JP2008011590A - Hybrid power generator - Google Patents

Abstract

In a hybrid power generation apparatus using sunlight and wind power, an apparatus having a windmill rotation assist function uses the same switching element and a pair of freewheel diodes during power running or regeneration. This semiconductor requires a withstand voltage design that takes into account the generator voltage when generating rated power, and there is a problem that the power loss during rotation assistance at low wind speeds increases and the package becomes large.
A hybrid power generation apparatus includes a solar power generation means 1 for receiving and generating sunlight, a generator 3 for generating and receiving wind with a windmill 2, a generated power storage means 4 for storing the generated power, Rotation assist control means 5 using a semiconductor having a lower withstand voltage than the generated power storage means 4 for controlling the windmill 2 to rotate at the wind speed is provided, and stable power from sunlight and wind power is used for assist control during assist. As a supply source, semiconductor loss can be further reduced, stabilization at the time of assist, loss reduction, and downsizing can be achieved.
[Selection] Figure 1

Description

  The present invention relates to a power generation device using sunlight and wind power.

  Conventionally, this type of wind turbine generator is known to use an integrated control device (bidirectional chopper circuit) for performing power running operation or regenerative operation and rotating the generator as a power generator or a motor (for example, patent document). 1).

  Hereinafter, the wind power generator in Patent Document 1 will be described with reference to FIG.

  As shown in FIG. 10, the wind turbine generator includes a wind turbine 7 and a generator 8 having a rotating shaft directly or indirectly connected to the rotating shaft of the wind turbine 7. Or it becomes the structure which can be used as an electric motor, the reversible power converter 9 connected with the generator 8, the bidirectional | two-way direct current chopper 10, the control part 11 which controls the bidirectional direct current chopper 10, and the bidirectional direct current chopper 10 is provided with a storage battery 12 connected to 10.

  In this configuration, when the wind speed is low (below the wind speed at which rotation is started), the electric power of the storage battery 12 is supplied from the bidirectional DC chopper 10 through the reversible power converter 9, and the generator 8 is driven to rotate as an electric motor. Rotation assistance is performed.

  As in Patent Document 1, it is necessary to manufacture the device after considering whether or not to assist at a low wind speed from the beginning of installation.

  Further, as a wind turbine generator having a similar start assist device, one having a bidirectional buck-boost converter is known (see, for example, Patent Document 2).

  Hereinafter, the wind power generator in Patent Document 3 will be described with reference to FIG.

  As shown in FIG. 11, the wind turbine generator includes an inverter circuit 13 on the output side of the AC generator, and a bidirectional buck-boost converter circuit 14 on the output side of the inverter circuit 13. In the case where bidirectional DC power flows through 14 and the windmill does not reach a predetermined rotational speed, the generator 15 is configured to be used as an electric motor.

  In this configuration, when the wind speed is low (below the wind speed at which rotation is started), electric power for rotationally driving the generator 15 through the inverter circuit 13 from the bidirectional buck-boost converter circuit 14 is supplied, and the time until power generation The power generation efficiency is improved.

  As in Patent Document 1, it is necessary to manufacture the device after considering whether or not to assist at a low wind speed from the beginning of installation.

  Similarly, as a power generation device showing a specific assist control method, it has been proposed to perform power running operation until reaching the power generation start rotational speed as a trigger for starting power generation (for example, Patent Document 3).

  Hereinafter, the wind power generator in Patent Document 3 will be described with reference to FIG.

As shown in FIG. 12, the wind turbine generator is connected to a power system via a power generation control device 20 configured by a converter 18 and an inverter 19, a generator 17 driven by a windmill 16. Among these, the wind speed discriminator 21 and the rotation speed discriminator 22 determine that the wind speed is a wind speed capable of generating power, but the rotor rotation speed N is rotor stop rotation speed N _O ≦ N ≦ power generation start rotation speed N _P. Then, the output current of the converter 18 is controlled based on the output current characteristics in the output adjustment circuit 23, the output current of the converter 18 detected by the current detector CT1, and the rotor rotational speed N, and the power running operation of the generator 17 is performed. When the rotor rotation speed N is increased to the power generation start rotation speed N _P , the generator 17 is controlled to switch to the regenerative operation and start power generation. Further, when the wind turbine 16 does not start even at a wind speed at which power can be generated, the rotor is forcibly rotated by power running operation to reliably generate power.

  In this configuration, even when the wind speed is low (below the wind speed at which rotation is started), the generator 17, that is, the windmill 16 is driven to rotate according to the rotational speed of the rotor by performing a power running operation from the converter 18 through the inverter 19. Rotation is started by supplying electric power.

Also in this configuration, as in Patent Documents 1 and 2, it is necessary to manufacture the apparatus after considering whether or not to assist at a low wind speed from the beginning of installation.
JP 2004-64806 A JP 2003-299396 A JP-A-8-322298

  In such a power generator, the wind turbine is assisted to rotate only when the wind speed is low (for example, when the wind speed is 2.5 m / s or less). Therefore, the drive voltage of the connected generator reaches only the voltage for rotational driving, and does not become a high voltage as in a strong wind. Therefore, the withstand voltage required for the power control circuit for rotationally driving the windmill does not have to be so high, but the circuit for rotational driving, that is, the inverter circuit, and the converter circuit for controlling the generated power are the same. The withstand voltage will be the same. As a result, the circuit can be simplified, but since power is supplied via electronic components having a high withstand voltage during rotational driving, the loss in the course of passing through the power control circuit increases. This is because an electronic component having a high withstand voltage, that is, a semiconductor has a high saturation voltage or a high on-resistance. For this reason, there has been a problem that the power generated and stored cannot be effectively used as the heat sink becomes large due to loss by the power control circuit.

  The present invention solves the above-mentioned problem, and by rotating the withstand voltage of the power control circuit unit that assists the rotational drive of the wind power generator to be lower than the withstand voltage of the power control circuit used for storing the generated power, An object of the present invention is to provide a wind turbine generator that can reduce power loss during driving and that makes more effective use of generated power.

  The hybrid power generation device of the present invention includes solar power generation means for receiving and generating sunlight, wind power generation means for receiving and generating wind with a windmill, and generated power storage means for storing electric power generated by the wind power generation means, A power generation device including rotation assist control means for controlling the windmill to rotate at a low wind speed, wherein a withstand voltage of a power supply circuit provided in the rotation assist control means is a charging circuit provided in the generated power storage means The breakdown voltage is set to be lower than the withstand voltage.

  By this means, by supplying optimum power to the generator at the time of rotation assist at a low wind speed (for example, when the wind speed is 2.5 m / s or less), the withstand voltage of the power supply circuit is set to the minimum withstand voltage. In the semiconductor of the power supply circuit, it is possible to reduce the saturation voltage or the on-resistance at the time of on-state, and it is possible to make the circuit configuration lighter, smaller, and lower loss. By adopting a configuration that effectively uses electric power, that is, electric power charged in the storage battery, a hybrid power generator that can perform rotation assist control more stably can be obtained.

  Further, the rotation assist control means is configured to include additional connection means that can be freely attached and detached.

  By this means, it is possible to obtain a simpler and lower-cost hybrid power generator that is not connected when rotation driving is not required.

  Further, the rotation assist control means includes a branch means for branching the output end of the generator provided in the wind power generation means in the additional connection means, and the rotation means for the rotation assist control means or the generated power storage means according to the state of the windmill. Is configured to switch between.

  By this means, there is provided a hybrid power generator capable of starting and stopping the rotation assist according to the windmill situation and at the same time controlling so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. can get.

  The rotation assist control means controls the additional connection means so that the voltage amplitude of any one phase of the generator does not exceed the withstand voltage of the rotation assist control means, and the rotation assist control means transfers the generated power to the generated power storage means. It is configured to perform switching.

  By this means, there is provided a hybrid power generator capable of starting and stopping the rotation assist according to the windmill situation and at the same time controlling so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. can get.

  Further, the rotation assist control means stores in advance the correlation between the voltage amplitude of one phase of the generator and the voltage frequency, and controls the additional connection means so that the voltage frequency does not exceed the specified frequency, thereby rotating the rotation assist. The configuration is such that the control means switches to the generated power storage means.

  By this means, there is provided a hybrid power generator capable of starting and stopping the rotation assist according to the windmill situation and at the same time controlling so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. can get.

  Further, the voltage frequency is measured at the cycle of the zero cross point.

  By this means, a hybrid power generator capable of detecting the voltage frequency with a simpler configuration can be obtained.

  Further, the rotation assist control means controls the rotation assist control by controlling the additional connection means so that the current frequency does not exceed the specified frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency. It is configured to switch from the means to the generated power storage means.

  By this means, there is provided a hybrid power generator capable of starting and stopping the rotation assist according to the windmill situation and at the same time controlling so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. can get.

  Further, the current frequency is measured at the cycle of the zero cross point.

  By this means, a hybrid power generator capable of detecting the current frequency with a simpler configuration can be obtained.

  Further, the rotation assist control means controls the additional connection means so that the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means does not exceed the predetermined value range. Thus, the rotation assist control means is switched to the generated power storage means.

  By this means, there is provided a hybrid power generator capable of starting and stopping the rotation assist according to the windmill situation and at the same time controlling so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. can get.

  The rotation assist control means controls the additional connection means when the voltage amplitude of any one phase of the generator falls below a predetermined voltage so as to switch from the generated power storage means to the rotation assist control means. This is a simple configuration.

  By this means, it is possible to obtain a hybrid power generator that can start and stop the rotation assist in accordance with the windmill situation and at the same time detect whether or not the rotation has stopped with a simple configuration.

  Furthermore, the rotation assist control means controls the additional connection means when the voltage frequency falls below a predetermined frequency based on the correlation between the voltage amplitude and voltage frequency of any one of the previously stored generators, and generates generated power. The storage means is switched to the rotation assist control means.

  By this means, it is possible to obtain a hybrid power generator that can start and stop the rotation assist in accordance with the windmill situation and at the same time detect whether or not the rotation has stopped with a simple configuration.

  Further, the rotation assist control means controls the additional connecting means when the current frequency falls below a predetermined frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency, thereby generating generated power. The storage means is switched to the rotation assist control means.

  By this means, it is possible to obtain a hybrid power generator that can start and stop the rotation assist in accordance with the windmill situation and at the same time detect whether or not the rotation has stopped with a simple configuration.

  Further, the rotation assist control means controls the additional connection means when the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means falls below a predetermined value range. Thus, the generated power storage means is switched to the rotation assist control means.

  By this means, it is possible to obtain a hybrid power generator that can start and stop the rotation assist in accordance with the windmill situation and at the same time detect whether or not the rotation has stopped with a simple configuration.

  The rotation assist control means is configured to minimize the frequency of switching between the rotation assist control means and the generated power storage means and the change from the generated power storage means to the rotation assist control means. It is.

  By this means, the mutual switching between the rotation assist control means and the generated power storage means can be suppressed to the minimum number of times, and a hybrid power generator capable of performing stable rotation assist control can be obtained.

  Further, the rotation assist control means switches the voltage amplitude of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The voltage amplitude of any one phase of the generator is different from each other.

  By this means, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and a hybrid power generator capable of performing smoother control can be obtained.

  The rotation assist control means switches the voltage frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The voltage frequency of any one phase of the generator is different from each other.

  By this means, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and a hybrid power generator capable of performing smoother control can be obtained.

  Further, the rotation assist control means switches the current frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The current frequency of any one phase of the generator is different from each other.

  By this means, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and a hybrid power generator capable of performing smoother control can be obtained.

  Further, the rotation assist control means is a voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the rotation assist control means to the generated power storage means and the withstand voltage of the power supply circuit of the rotation assist control means. And the voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the generated power storage means to the rotation assist control means is different from the withstand voltage of the power supply circuit of the rotation assist control means. This is a simple configuration.

  By this means, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and a hybrid power generator capable of performing smoother control can be obtained.

  According to the present invention, wind power generation means for receiving and generating wind with a windmill, generated power storage means for storing electric power generated by the wind power generation means, and rotation assist control means for controlling the windmill to rotate at a low wind speed. A wind turbine having a withstand voltage of a power supply circuit provided in the rotation assist control means lower than a withstand voltage of a charging circuit provided in the generated power storage means. While supplying optimal power to the generator at the time of rotation assist at a low wind speed that does not start rotation (for example, when the wind speed is 2.5 m / s or less), the withstand voltage of the power supply circuit is set to the minimum withstand voltage, In power supply circuit semiconductors, it is possible to reduce the saturation voltage or on-resistance during on-state, making it possible to make the circuit configuration lighter, smaller, and lower loss. Possible to provide a hybrid-type power generating device which can take advantage performs rotation assist control.

  According to the present invention, solar power generation means for receiving and generating sunlight, wind power generation means for receiving and generating wind with a windmill, generated power storage means for storing electric power generated by the wind power generation means, and at low wind speeds A power generation device including rotation assist control means for controlling the windmill to rotate, wherein the withstand voltage of the power supply circuit provided in the rotation assist control means is the withstand voltage of the charging circuit provided in the generated power storage means By adopting a lower configuration, the withstand voltage of the power supply circuit is minimized while supplying optimal power to the generator during rotation assist at low wind speeds (for example, when the wind speed is 2.5 m / s or less). In the semiconductor of the power supply circuit, it is possible to reduce the saturation voltage or the on-resistance of the power supply circuit, and to make the circuit configuration lighter, smaller, and lower loss. Possible to provide a hybrid-type power generating device which can power generated by the power generator, i.e. by effectively using the electric power charged in the storage battery performs rotation assist control.

  Further, by providing the additional connection means that allows the rotation assist control means to be freely attached and detached, it is possible to provide a simpler and lower cost hybrid power generation apparatus that is not connected when rotation driving is not required.

  Further, the rotation assist control means includes a branch means for branching the output end of the generator provided in the wind power generation means in the additional connection means, and the rotation means for the rotation assist control means or the generated power storage means according to the state of the windmill. The rotation assist can be started and stopped according to the windmill situation, and at the same time, the control can be performed so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. It is possible to provide a hybrid power generator that can be used.

  The rotation assist control means controls the additional connection means so that the voltage amplitude of any one phase of the generator does not exceed the withstand voltage of the rotation assist control means, and the rotation assist control means transfers the generated power to the generated power storage means. By adopting a configuration for switching, rotation assist can be started and stopped according to the windmill conditions, and at the same time, control can be performed so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. A hybrid power generator can be provided.

  Further, the rotation assist control means controls the rotation assist control by controlling the additional connection means so that the voltage frequency does not exceed the specified frequency based on the correlation between the voltage amplitude and the voltage frequency of any one phase of the generator stored in advance. By switching from the means to the generated power storage means, the rotation assist can be started and stopped according to the windmill situation, and at the same time the withstand voltage of the power supply circuit provided in the rotation assist control means is reduced. It is possible to provide a hybrid power generator that can be controlled so as not to exceed.

  In addition, by adopting a configuration in which the voltage frequency is measured at the cycle of the zero cross point, a hybrid power generator that can detect the voltage frequency with a simpler configuration can be provided.

  Further, the rotation assist control means controls the rotation assist control by controlling the additional connection means so that the current frequency does not exceed the specified frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency. By switching from the means to the generated power storage means, the rotation assist can be started and stopped according to the windmill situation, and at the same time the withstand voltage of the power supply circuit provided in the rotation assist control means is reduced. It is possible to provide a hybrid power generator that can be controlled so as not to exceed.

  In addition, by adopting a configuration in which the current frequency is measured at the cycle of the zero cross point, it is possible to provide a hybrid power generator that can detect the current frequency with a simpler configuration.

  Further, the rotation assist control means controls the additional connection means so that the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means does not exceed the predetermined value range. The rotation assist control means can be switched from the rotation assist control means to the generated power storage means, so that the rotation assist can be started and stopped according to the situation of the windmill, and at the same time, the rotation assist control means is provided. It is possible to provide a hybrid power generator that can be controlled so as not to exceed the withstand voltage of the power supply circuit.

  The rotation assist control means controls the additional connection means when the voltage amplitude of any one phase of the generator falls below a predetermined voltage so as to switch from the generated power storage means to the rotation assist control means. By adopting a simple configuration, it is possible to provide a hybrid power generator that can start and stop the rotation assist according to the state of the windmill and at the same time detect whether or not the rotation has stopped with a simple configuration.

  Furthermore, the rotation assist control means controls the additional connection means when the voltage frequency falls below a predetermined frequency based on the correlation between the voltage amplitude and voltage frequency of any one of the previously stored generators, and generates generated power. By switching from the storage means to the rotation assist control means, the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped is detected with a simple structure. It is possible to provide a hybrid power generation device that can be used.

  Further, the rotation assist control means controls the additional connecting means when the current frequency falls below a predetermined frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency, thereby generating generated power. By switching from the storage means to the rotation assist control means, the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped is detected with a simple structure. It is possible to provide a hybrid power generation device that can be used.

  Further, the rotation assist control means controls the additional connection means when the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means falls below a predetermined value range. Thus, by switching from the generated power storage means to the rotation assist control means, the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped. Can be provided with a simple configuration.

  In addition, the rotation assist control means is configured to minimize the frequency of switching between the rotation assist control means and the generated power storage means and the change from the generated power storage means to the rotation assist control means. Therefore, the mutual switching between the rotation assist control means and the generated power storage means can be suppressed to a minimum number of times, and a hybrid power generator capable of performing stable rotation assist control can be provided.

  Further, the rotation assist control means switches the voltage amplitude of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. By adopting a configuration in which the voltage amplitude of one phase of the generator is different, hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control is performed. It is possible to provide a hybrid power generator that can

  The rotation assist control means switches the voltage frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. By adopting a configuration in which the voltage frequency of any one phase of the generator is different, hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control is performed. It is possible to provide a hybrid power generator that can

  Further, the rotation assist control means switches the current frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. By making the current frequency of one of the generators different from each other, hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control is performed. It is possible to provide a hybrid power generator that can

  Further, the rotation assist control means is a voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the rotation assist control means to the generated power storage means and the withstand voltage of the power supply circuit of the rotation assist control means. And the voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the generated power storage means to the rotation assist control means is different from the withstand voltage of the power supply circuit of the rotation assist control means. By adopting a simple configuration, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and it is possible to provide a hybrid power generator capable of performing smoother control.

  According to the present invention, solar power generation means for receiving and generating sunlight, wind power generation means for receiving and generating wind with a windmill, generated power storage means for storing electric power generated by the wind power generation means, and at low wind speeds A power generation device including rotation assist control means for controlling the windmill to rotate, wherein the withstand voltage of the power supply circuit provided in the rotation assist control means is the withstand voltage of the charging circuit provided in the generated power storage means While being configured to be lower, while supplying optimal power to the generator at the time of rotation assist at a low wind speed that does not start rotation of the windmill (for example, when the wind speed is 2.5 m / s or less), By making the withstand voltage of the power supply circuit the minimum withstand voltage and reducing the on-state saturation voltage or the on-resistance in the semiconductor of the power supply circuit, the circuit structure is lighter, smaller, and less lossy. It is possible to have the effect that the power generated by solar power and wind power generation, that is, effectively using the electric power charged in the storage battery can be performed rotation assist control.

  In addition, it is configured to include an additional connection means that allows the rotation assist control means to be freely attached and detached, so that it is not connected when rotation driving is not required, and the operation can be simplified and reduced in cost. Have.

  Further, the rotation assist control means includes a branch means for branching the output end of the generator provided in the wind power generation means in the additional connection means, and the rotation means for the rotation assist control means or the generated power storage means according to the state of the windmill. Rotation assist can be started and stopped according to the windmill conditions, and at the same time, control is performed so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. Has the effect of being able to

  The rotation assist control means controls the additional connection means so that the voltage amplitude of any one phase of the generator does not exceed the withstand voltage of the rotation assist control means, and the rotation assist control means transfers the generated power to the generated power storage means. It is configured to perform switching, and rotation assist can be started and stopped according to the windmill situation, and at the same time, control can be performed so as not to exceed the withstand voltage of the power supply circuit provided in the rotation assist control means. Has the effect of being able to.

  Further, the rotation assist control means stores in advance the correlation between the voltage amplitude of one phase of the generator and the voltage frequency, and controls the additional connection means so that the voltage frequency does not exceed the specified frequency, thereby rotating the rotation assist. It is configured to switch from the control means to the generated power storage means, and the rotation assist can be started and stopped according to the windmill situation, and at the same time, the resistance of the power supply circuit provided in the rotation assist control means can be increased. The voltage can be controlled so as not to exceed the voltage.

  Further, the voltage frequency is configured to be measured at a cycle of the zero cross point, and has an effect that the voltage frequency can be detected with a simpler configuration.

  Further, the rotation assist control means controls the rotation assist control by controlling the additional connection means so that the current frequency does not exceed the specified frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency. The power supply circuit provided in the rotation assist control means can be started and stopped at the same time as the rotation assist can be started and stopped according to the windmill situation. It has the effect that it can be controlled so as not to exceed.

  In addition, the current frequency is configured to be measured at the cycle of the zero cross point, and has an effect that the current frequency can be detected with a simpler configuration.

  Further, the rotation assist control means controls the additional connection means so that the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means does not exceed the predetermined value range. The rotation assist control means is switched to the generated power storage means, and the rotation assist can be started and stopped according to the windmill situation, and at the same time provided in the rotation assist control means. The power supply circuit can be controlled so as not to exceed the withstand voltage.

  The rotation assist control means controls the additional connection means when the voltage amplitude of any one phase of the generator falls below a predetermined voltage so as to switch from the generated power storage means to the rotation assist control means. The rotation assist can be started and stopped according to the windmill situation, and at the same time, it is possible to detect whether or not the rotation is stopped with a simple configuration.

  Furthermore, the rotation assist control means controls the additional connection means when the voltage frequency falls below a predetermined frequency based on the correlation between the voltage amplitude and voltage frequency of any one of the previously stored generators, and generates generated power. It is configured to switch from the storage means to the rotation assist control means, and the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped or not is simplified. It has the effect that it can be detected.

  Further, the rotation assist control means controls the additional connecting means when the current frequency falls below a predetermined frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency, thereby generating generated power. It is configured to switch from the storage means to the rotation assist control means, and the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped or not is simplified. It has the effect that it can be detected.

  Further, the rotation assist control means controls the additional connection means when the voltage difference between the DC input voltage of the three-phase PWM inverter provided therein and the withstand voltage of the power supply circuit of the rotation assist control means falls below a predetermined value range. Then, the configuration is such that the generated power storage means is switched to the rotation assist control means, and the rotation assist can be started and stopped according to the windmill situation, and at the same time whether the rotation has stopped. This has the effect that it can be detected with a simple configuration.

  The rotation assist control means is configured to minimize the frequency of switching between the rotation assist control means and the generated power storage means and the change from the generated power storage means to the rotation assist control means. Thus, the mutual switching between the rotation assist control means and the generated power storage means can be suppressed to a minimum number of times, and stable rotation assist control can be performed.

  Further, the rotation assist control means switches the voltage amplitude of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The voltage amplitude of any one phase of the generator is different, and hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control is possible. It has the effect that it can be performed.

  The rotation assist control means switches the voltage frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The voltage frequency of any one phase of the generator is different, and hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control can be achieved. It has the effect that it can be performed.

  Further, the rotation assist control means switches the current frequency of any one of the generators that switches from the rotation assist control means to the generated power storage means, and switches from the generated power storage means to the rotation assist control means. The current frequency of any one of the generators is configured to be different from each other, and hunting can be avoided by switching between the rotation assist control means and the generated power storage means, and smoother control can be achieved. It has the effect that it can be performed.

  Further, the rotation assist control means is a voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the rotation assist control means to the generated power storage means and the withstand voltage of the power supply circuit of the rotation assist control means. And the voltage difference between the DC input voltage of the three-phase PWM inverter provided inside for switching from the generated power storage means to the rotation assist control means is different from the withstand voltage of the power supply circuit of the rotation assist control means. Therefore, it is possible to avoid hunting by switching between the rotation assist control means and the generated power storage means, and it is possible to perform smoother control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a configuration diagram of a hybrid power generation apparatus according to Embodiment 1 of the present invention. Fig.1 (a) shows the block diagram of the wind power generation part of the hybrid type power generator, and FIG.1 (b) shows the block diagram of the solar power generation means.

  As shown in the figure, the hybrid power generation apparatus includes solar power generation means 1 for receiving and generating sunlight, a generator 3 as wind power generation means for receiving and generating wind with a windmill 2, and electric power generated by the generator 3. A generated power storage means 4 for storing and a rotation assist control means 5 for controlling the windmill 2 to rotate at a low wind speed are provided. The generated power storage means 4 includes a full-wave rectifier circuit unit 4a that converts AC power generated by the generator 3 into DC power, and a DC voltage that is converted into DC through the full-wave rectifier circuit unit 4a. It is comprised by the charge control part 4c which controls charge to the storage battery 4b so that a voltage may not be exceeded. The rotation assist control means 5 further includes a discharge circuit unit 5a that supplies the storage battery 4b as a power source for rotation assist, and a three-phase circuit that converts DC power obtained from the storage battery 4b through the discharge circuit unit 5a into AC power. A PWM inverter 5b is provided. Further, the additional connection means 6 includes a three-phase PWM inverter section 5b, an input section 6a for inputting a switching signal from the generated power storage means 4, and a three-phase PWM inverter section 5b or full-wave rectification from the generator 3 according to the switching signal. A switching unit 6b is provided as branching means for switching the connection to the circuit unit 4a.

  Next, the rotation assist control means 5 converts the DC power obtained from the storage battery 4b through the discharge circuit unit 5a into AC power, and the discharge circuit unit 5a that supplies the storage battery 4b as a power source for rotation assist. A three-phase PWM inverter unit 5b is provided. Further, the additional connection means 6 connects the input unit 6a for inputting the switching signal from the three-phase PWM inverter unit 5b and the connection from the generator 3 to the three-phase PWM inverter unit 5b or the full-wave rectifying circuit unit 4a according to the switching signal. A switching unit 6b for switching is provided. In this configuration, the input section 6a provided in the additional connection means 6 is normally connected to the full-wave rectifier circuit section 4a, that is, when there is no rotation assist control means 5, the full-wave rectifier circuit section 4a It is connected. Further, when there is no rotation assist control means 5, the power generated by the windmill 2 is simply stored in the storage battery 4b or used as a load. Furthermore, the discharge circuit unit 5a and the three-phase PWM inverter unit 5b determine whether or not to drive from the generated voltage and generated current of the generator 3. For example, the driving is started when the generated voltage is not more than the specified voltage V_low and the generated current is not more than the specified current I_low, and the driving is stopped when the generated voltage is not less than V_hi. However, the direction in which the specified current I_low flows during power generation is positive. When this drive is started, a switching signal is output to the additional connecting means 6. Further, the additional connection means 6 is connected to the full-wave rectifier circuit unit 4a or the three-phase PWM inverter unit 5b by switching the switching unit 6b according to the switching signal of the input unit 6a.

  Next, a control flowchart of the charging control unit 4c will be described with reference to FIG.

  As shown in the figure, the charging control unit 4c compares the actual value Vdc of the DC voltage with a specified upper limit voltage value (target value Vdc_ref), and calculates a charging current target value Idc_ref. Next, the voltage detection value Vbatt of the storage battery 4b is input, it is determined whether or not the specified voltage Vbatt_c has been reached, and when the specified voltage Vbatt_c has been reached, the charging current for controlling to the specified voltage Vbatt_c Implement limit control to limit to If not, control is performed within a range not exceeding the maximum charging current Idc_max of the storage battery 4b. In this case, the generated power becomes excessive due to limit control or limiting by the maximum charging current, but in this case, the voltage after full-wave rectification increases. When the voltage after full-wave rectification rises to the second specified voltage Vdc_ref2, control is performed so that a protective resistor is connected. The protection resistor is disconnected based on the detection calculation value of the generated power of the generator 3.

  Next, a control flowchart of the three-phase PWM inverter unit 5b will be described with reference to FIG.

  As shown in the figure, the phase voltages for the three phases of the generator 3 are input, and it is determined whether or not a specified voltage (for example, Vmax−Vm) has been exceeded. At this time, Vmax indicates the maximum rated voltage of the semiconductor used in the three-phase PWM inverter 5b, and Vm indicates a margin voltage. As a result of the determination, if the voltage is not more than the specified voltage, the rotation assist is continued. When the specified voltage is exceeded, that is, the three-phase PWM inverter unit 5b is stopped and a switching signal is output to the input unit 6a so that it can be used within a safe region that does not exceed the withstand voltage of the three-phase PWM inverter unit 5b. Conversely, the phase voltages for the three phases of the generator 3 are input, and it is determined whether or not the voltage falls below a specified voltage (for example, Vmin + Vm). At this time, Vmin indicates a minimum voltage at which the wind turbine 2 can continue to rotate independently, and Vm indicates a margin voltage. As a result of the determination, if the voltage is lower than the specified voltage, the rotation assist is turned on. Here, the prescribed voltage (Vmax−Vm) for separating the assist and the prescribed voltage (Vmin + Vm) for turning on the assist are different from each other. By making the voltage to be switched different from each other, the frequency of switching is minimized.

  With the above configuration, when the rotation assist control means 5 is not connected, only the electric power generated by the normal windmill 2 is controlled and stored in the storage battery 4b. When the rotation assist control means 5 is connected, Then, the generator 3 is driven as a motor to assist rotation. In addition, during rotation assist, it can be used in a region where the withstand voltage of the semiconductor of the three-phase PWM inverter 5b does not exceed the semiconductor, and at the same time, by using a semiconductor component with a low withstand voltage, the saturation voltage is low or the on-resistance Can be small.

  As described above, according to the first embodiment, the power loss of the three-phase PWM inverter unit 5b can be reduced at the time of rotation assist, and the rotation assist control is performed by effectively using the power charged in the storage battery 4b. be able to.

  In the first embodiment, the additional connection means 6 is configured to switch the connection from the generator 3 to the full-wave rectifier circuit unit 4a. However, the three-phase PWM inverter unit is parallel to the full-wave rectifier circuit unit 4a. There is no difference in operation and effect even if the semiconductor device of the three-phase PWM inverter unit 5b is separated by configuring 5b.

(Embodiment 2)
FIG. 4 shows a configuration diagram of a hybrid power generation device according to Embodiment 2 of the present invention. FIG. 4A shows a configuration diagram of a wind power generation part of the hybrid power generation device, and FIG. 4B shows a configuration diagram of the solar power generation means.

  The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in the figure, the hybrid power generator includes a generator 3 as a wind power generator that receives wind from the windmill 2, power generation storage means 4 that stores electric power generated by the generator 3, and a windmill at a low wind speed. Is provided with rotation assist control means 5B for controlling so as to rotate. The generated power storage means 4 includes a full-wave rectifier circuit unit 4a that converts AC power generated by the generator 3 into DC power, and a DC voltage that is converted into DC through the full-wave rectifier circuit unit 4a. It is comprised by the charge control part 4c which controls charge to the storage battery 4b so that a voltage may not be exceeded. Further, the rotation assist control means 5B includes a discharge circuit unit 5Ba that supplies the storage battery 4b as a power source for rotation assist, and a three-phase circuit that converts DC power obtained from the storage battery 4b via the discharge circuit unit 5Ba into AC power. A PWM inverter 5Bb is provided. The additional connecting means 6 includes a three-phase PWM inverter 5Bb, an input part 6a for inputting a switching signal from the generated power storage means 4, and a three-phase PWM inverter 5Bb or full-wave rectification from the generator 3 according to the switching signal. A switching unit 6b is provided as branching means for switching the connection to the circuit unit 4a.

  Next, a control flowchart of the three-phase PWM inverter unit 5Bb will be described with reference to FIG.

  As shown in the figure, each voltage frequency for the three phases of the generator 3 is detected. Each voltage frequency is detected based on a time deviation from the zero cross to the next zero cross. From the calculated time deviation, it is determined whether or not the correlation between the voltage of the generator 3 and the voltage frequency and the generator current at that time exceeds a specified frequency (for example, Fmax−Fm). At this time, Fmax represents a generator frequency corresponding to the maximum rated voltage Vmax of the semiconductor used for the three-phase PWM inverter 5Bb, and Fm represents a margin frequency. As a result of the determination, if the frequency is not more than the specified frequency and the power supply for rotation assist is not more than the specified value, the rotation assist is continued. When the specified frequency is exceeded, that is, when the region that may exceed the withstand voltage of the three-phase PWM inverter unit 5Bb is reached, the three-phase PWM inverter unit 5Bb is stopped and a switching signal is output to the input unit 6a. On the contrary, it is determined whether or not the correlation between the voltage of the generator 3 and the voltage frequency is based on the calculated time deviation, and the generator current at that time is below a specified frequency (for example, Fmin + Fm). At this time, Fmin indicates the minimum frequency at which the windmill 2 can continue to rotate independently, and Fm indicates the margin frequency. As a result of the determination, if the frequency is below the specified frequency and the power supply for rotation assist is below the specified value, the rotation assist is turned on. Here, the prescribed frequency (Fmax−Fm) for separating the assist and the prescribed frequency (Fmin + Fm) for turning on the assist are different from each other. By making the switching frequency different from each other, the switching frequency is minimized.

  With the above configuration, when the rotation assist control means 5B is not connected, only the electric power generated by the normal windmill 2 is controlled and stored in the storage battery 4b. When the rotation assist control means 5B is connected, Then, the generator 3 is driven as a motor to assist rotation. In addition, during rotation assist, it can be used in a region where the withstand voltage of the semiconductor of the three-phase PWM inverter unit 5Bb does not exceed the semiconductor withstand voltage. Can be small.

  As described above, according to the second embodiment, the power loss of the three-phase PWM inverter unit 5Bb can be reduced during rotation assist, and rotation assist control is performed by effectively utilizing the power charged in the storage battery 4b. be able to.

(Embodiment 3)
FIG. 6 shows a configuration diagram of a hybrid power generation device according to Embodiment 3 of the present invention. FIG. 6A shows a configuration diagram of a wind power generation part of the hybrid power generation device, and FIG. 6B shows a configuration diagram of the solar power generation means.

  The same parts as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in the figure, the hybrid power generator includes a generator 3 as a wind power generator that receives wind from the windmill 2, power generation storage means 4 that stores electric power generated by the generator 3, and a windmill at a low wind speed. Rotation assist control means 5C for controlling the motor to rotate. The generated power storage means 4 includes a full-wave rectifier circuit unit 4a that converts AC power generated by the generator 3 into DC power, and a DC voltage that is converted into DC through the full-wave rectifier circuit unit 4a. It is comprised by the charge control part 4c which controls charge to the storage battery 4b so that a voltage may not be exceeded. Further, the rotation assist control means 5C includes a discharge circuit unit 5Ca that supplies the storage battery 4b as a power source for rotation assist, and a three-phase circuit that converts DC power obtained from the storage battery 4b via the discharge circuit unit 5Ca into AC power. A PWM inverter 5Cb is provided. The additional connection means 6 includes a three-phase PWM inverter 5Cb, an input part 6a for inputting a switching signal from the generated power storage means 4, and a three-phase PWM inverter 5Cb or full-wave rectification from the generator 3 according to the switching signal. A switching unit 6b is provided as branching means for switching the connection to the circuit unit 4a.

  Next, a control flowchart of the three-phase PWM inverter unit 5Cb will be described with reference to FIG.

  As shown in the figure, each current frequency for the three phases of the generator 3 is detected. Each current frequency is detected based on a time deviation from the zero cross to the next zero cross. From the calculated time deviation, it is determined whether or not the correlation between the voltage of the generator 3 and the current frequency, and the generator current at that time exceeds a specified frequency (for example, Fmax−Fm). At this time, Fmax represents a generator frequency corresponding to the maximum rated voltage Vmax of the semiconductor used for the three-phase PWM inverter 5Cb, and Fm represents a margin frequency. As a result of the determination, if the frequency is not more than the specified frequency and the power supply for rotation assist is not more than the specified value, the rotation assist is continued. When the specified frequency is exceeded, that is, when the region that may exceed the withstand voltage of the three-phase PWM inverter unit 5Cb is reached, the three-phase PWM inverter unit 5Cb is stopped and a switching signal is output to the input unit 6a. Conversely, when the current frequency falls below a predetermined frequency (Fmin + Fm), a switching signal is output to the input unit 6a to switch from the generated power storage means 4 to the rotation assist control means 5C. Here, the prescribed frequency (Fmax−Fm) for separating the assist and the prescribed frequency (Fmin + Fm) for turning on the assist are different from each other. By making the switching frequency different from each other, the switching frequency is minimized.

  With the above configuration, when the rotation assist control means 5C is not connected, only the electric power generated by the normal windmill 2 is controlled and stored in the storage battery 4b. When the rotation assist control means 5C is connected, Then, the generator 3 is driven as a motor to assist rotation. Further, during rotation assist, it can be used in a region where the withstand voltage of the semiconductor of the three-phase PWM inverter unit 5Cb does not exceed the semiconductor, and at the same time, by using a semiconductor component with a low withstand voltage, the saturation voltage is low or the on-resistance is reduced. Can be small.

  As described above, according to the third embodiment, the power loss of the three-phase PWM inverter unit 5Cb can be reduced during rotation assist, and rotation assist control is performed by effectively using the power charged in the storage battery. Can do.

(Embodiment 4)
FIG. 8 shows a configuration diagram of a hybrid power generation device according to Embodiment 4 of the present invention. Fig.8 (a) shows the block diagram of the wind power generation part of the hybrid type power generator, and FIG.8 (b) shows the block diagram of the solar power generation means.

  In addition, the same number is attached | subjected to the same part as either of Embodiment 1 thru | or 3, and the detailed description is abbreviate | omitted.

  As shown in the figure, the hybrid power generator includes a generator 3 as a wind power generator that receives wind from the windmill 2, power generation storage means 4 that stores electric power generated by the generator 3, and a windmill at a low wind speed. Is provided with rotation assist control means 5D for controlling the motor to rotate. The generated power storage means 4 includes a full-wave rectifier circuit unit 4a that converts AC power generated by the generator 3 into DC power, and a DC voltage that is converted into DC through the full-wave rectifier circuit unit 4a. It is comprised by the charge control part 4c which controls charge to the storage battery 4b so that a voltage may not be exceeded. Further, the rotation assist control means 5D includes a discharge circuit unit 5Da that supplies the storage battery 4b as a power source for rotation assist, and a three-phase circuit that converts DC power obtained from the storage battery 4b via the discharge circuit unit 5Da into AC power. A PWM inverter 5Db is provided. Further, the additional connection means 6 includes a three-phase PWM inverter 5Db, an input part 6a for inputting a switching signal from the generated power storage means 4, and a three-phase PWM inverter 5Db or full-wave rectification from the generator 3 according to the switching signal. A switching unit 6b is provided as branching means for switching the connection to the circuit unit 4a.

  Next, a control flowchart of the three-phase PWM inverter unit 5Db will be described with reference to FIG.

  As shown in the figure, the three-phase PWM inverter unit 5Db detects the output voltage of the discharge circuit unit 5Da, that is, the DC input voltage of the three-phase PWM inverter unit 5Db. The DC input voltage at this time is detected, and the deviation between the withstand voltage Vmax of the semiconductor and the detected voltage value Vdc (t) is calculated. When the deviation at this time falls below the margin voltage Vm, the three-phase PWM inverter unit 5Db is stopped and a switching signal is output to the input unit 6a. On the contrary, when this deviation exceeds the maximum margin voltage Vlm, a switching signal is output to the input unit 6a to switch to the three-phase PWM inverter unit 5Db and start the stopped three-phase PWM inverter unit 5Db. . Here, the margin voltage Vm for separating the assist and the maximum margin voltage Vlm for turning on the assist are different from each other. By making the voltage to be switched different from each other, the frequency of switching is minimized.

  Normally, when the windmill 2 can be driven to rotate independently by wind power, the discharge power from the discharge circuit unit 5Da is not required, and as a result, the output voltage of the discharge circuit unit 5Da increases, but the windmill 2 is autonomous. When the rotation drive cannot be performed, the output circuit is supplied from the discharge circuit unit 5Da to the generator 3 via the three-phase PWM inverter unit 5Db, so that the output voltage is not increased and the control voltage is maintained. This power balance is used for the above determination.

  With the above configuration, when the rotation assist control means 5D is not connected, only the electric power generated by the normal windmill 2 is controlled and stored in the storage battery 4b. When the rotation assist control means 5D is connected, Then, the generator 3 is driven as a motor to assist rotation. Further, during rotation assist, it can be used in a region where the withstand voltage of the semiconductor of the three-phase PWM inverter unit 5Db does not exceed the semiconductor, and at the same time, by using a semiconductor component having a low withstand voltage, the saturation voltage is low or the on-resistance is reduced. Can be small.

  As described above, according to the fourth embodiment, the power loss of the three-phase PWM inverter unit 5Db can be reduced during rotation assist, and rotation assist control is performed by effectively utilizing the power charged in the storage battery 4b. be able to.

  It assists and accelerates the rotational drive of the wind power generator, and can be applied to propeller type and Darrieus type as well as Savonius windmill.

Configuration diagram of hybrid power generation device according to Embodiment 1 of the present invention ((a) is a configuration diagram of a wind power generation part of the hybrid power generation device, (b) is a configuration diagram of the solar power generation means) Control flowchart of the charging control unit 4c Control flowchart of the three-phase PWM inverter unit 5b Explanatory drawing of the hybrid power generator of Embodiment 2 of this invention ((a) is a block diagram of the wind power generation part of the hybrid power generator, (b) is a block diagram of the solar power generation means) Control flow chart of the same three-phase PWM inverter 5Bb Configuration diagram of hybrid power generation device according to Embodiment 3 of the present invention ((a) is a configuration diagram of a wind power generation part of the hybrid power generation device, (b) is a configuration diagram of the solar power generation means) Control flowchart of the three-phase PWM inverter unit 5Cb Configuration diagram of hybrid power generation device of embodiment 4 of the present invention ((a) is a configuration diagram of a wind power generation part of the hybrid power generation device, (b) is a configuration diagram of the solar power generation means) Control flow chart of the same three-phase PWM inverter 5Db Configuration diagram of a conventional wind power generator in Patent Document 1 Configuration diagram of a conventional wind power generator in Patent Document 2 Configuration diagram of wind power generator in conventional Patent Document 3

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation means 2 Windmill 3 Generator 4 Power generation storage means 4a Full wave rectification circuit part 4b Storage battery 4c Charge control part 5, 5B, 5C, 5D Rotation assist control means 5a, 5Ba, 5Ca, 5Da Discharge circuit part 5b, 5Bb, 5Cb, 5Db Three-phase PWM inverter part 6 Additional connection means 6a Input part 6b Switching part

Claims (18)

Solar power generation means for receiving and generating sunlight, wind power generation means for receiving and generating wind with a windmill, generated power storage means for storing power generated by the solar power generation means or the wind power generation means, and at low wind speeds A hybrid provided with additional connection means for additionally connecting rotation assist control means for assisting rotation of the windmill by discharging control of electric power stored in the generated power storage means so that the windmill rotates and using the generator as an electric motor A hybrid power generator, wherein a withstand voltage of a power supply circuit provided in the rotation assist control means is lower than a withstand voltage of a charging circuit provided in the generated power storage means. 2. The hybrid power generator according to claim 1, further comprising additional connecting means for freely attaching and detaching the rotation assist control means. The additional connection means switches the output means of the generator provided in the wind power generation means, and switches the rotation assist control means or the generated power storage means according to the state of the windmill. Item 2. The hybrid power generator according to Item 1. The additional connection means switches from the rotation assist control means to the generated power storage means so that the voltage amplitude of any one phase of the generator does not exceed the withstand voltage of the rotation assist control means. The hybrid power generator according to 1. The additional connection means switches from the rotation assist control means to the generated power storage means so that the voltage frequency does not exceed the specified frequency based on the correlation between the voltage amplitude and voltage frequency of any one phase of the generator stored in advance. The hybrid power generator according to claim 1. The hybrid power generator according to claim 4, wherein the voltage frequency is measured at a cycle of a zero cross point. The additional connection means switches from the rotation assist control means to the generated power storage means so that the current frequency does not exceed the specified frequency based on the correlation between the voltage amplitude and current frequency of any one of the previously stored generators. The hybrid power generator according to claim 1. The hybrid power generator according to claim 6, wherein the current frequency is measured at a cycle of a zero cross point. The additional connecting means generates power from the rotation assist control means so that the voltage difference between the DC voltage after rectifying the AC voltage of the generator and the withstand voltage of the power supply circuit of the rotation assist control means does not exceed a predetermined value range. 2. The hybrid power generator according to claim 1, wherein switching to storage means is performed. 2. The hybrid according to claim 1, wherein the additional connection means switches from the generated power storage means to the rotation assist control means when the voltage amplitude of any one phase of the generator falls below a predetermined voltage. Type generator. The additional connection means switches from the generated power storage means to the rotation assist control means when the voltage frequency falls below a predetermined frequency based on the correlation between the voltage amplitude and voltage frequency of any one of the previously stored generators. The hybrid power generator according to claim 1, wherein the hybrid power generator is performed. The additional connection means switches from the generated power storage means to the rotation assist control means when the current frequency falls below a predetermined frequency based on the correlation between the voltage amplitude of one phase of the generator stored in advance and the current frequency. The hybrid power generator according to claim 1, wherein the hybrid power generator is performed. When the voltage difference between the DC voltage after rectifying the AC voltage of the generator and the withstand voltage of the power supply circuit of the rotation assist control means falls below a predetermined value range, the additional connection means is supplied from the generated power storage means to the rotation assist. 2. The hybrid power generator according to claim 1, wherein switching to the control means is performed. The additional connection means is characterized in that the frequency of switching from the rotation assist control means to the generated power storage means and the change from the generated power storage means to the rotation assist control means is minimized. The hybrid power generator according to any one of 3 to 9. The additional connection means includes a voltage amplitude of any one of the generators that performs switching from the rotation assist control means to the generated power storage means, and a generator that performs switching from the generated power storage means to the rotation assist control means. The hybrid power generator according to claim 3 or 9, wherein the voltage amplitude of any one phase is different. The additional connection means includes a voltage frequency of any one of the generators that performs switching from the rotation assist control means to the generated power storage means, and a generator that performs switching from the generated power storage means to the rotation assist control means. The hybrid power generator according to claim 4 or 10, wherein any one of the phases has a different voltage frequency. The additional connection means includes a current frequency of any one of the generators that performs switching from the rotation assist control means to the generated power storage means, and a generator that performs switching from the generated power storage means to the rotation assist control means. The hybrid power generator according to claim 6 or 11, wherein any one phase has a different current frequency. The additional connection means includes a voltage difference between a DC voltage after rectifying the AC voltage of the generator that performs switching from the rotation assist control means to the generated power storage means and a withstand voltage of the power supply circuit of the rotation assist control means, and the power generation The voltage difference between the DC voltage after rectifying the AC voltage of the generator that performs switching from the power storage means to the rotation assist control means and the withstand voltage of the power supply circuit of the rotation assist control means are different from each other. Item 15. The hybrid power generator according to Item 8 or 12.

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