CN203027153U - Universal smart power grid power electronic device - Google Patents

Abstract

The utility model relates to a universal smart power grid power electronic device which comprises a control system, a main circuit system and a mutual inductor hall sensor module, wherein an IGBT (Insulated Gate Bipolar Transistor) driving module of the control system is connected with a front-end inversion link and a rear-end inversion link of the main circuit system, a switching value processing module of the control system is connected with a front-end series reactor, a front-end soft charging link, a rear-end soft charging link and a rear-end series reactor of the main circuit system, the front-end series reactor and the rear-end series reactor are also respectively provided with a front-end connection port and a rear-end connection port which are connected with external power equipment so as to realize different functions, and two ends of the mutual inductor hall sensor module are respectively connected with an analog quantity processing module and the master circuit system electrically. Functions of two or more power electronic devices can be realized through the device only after the user only modifies the parameters and peripheral wirings, the universal smart power grid power electronic device is flexible and convenient to use, high in intelligentization and reliability, and capable of saving investment cost and reducing the idle equipment and waste.

Description

Universal smart grid power electronic device

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of power electronic control, especially, relate to a general smart power grids power electronic device.

[ background of the invention ]

At present, the power electronic industry is in an active development period, power electronic products are continuously emerging, and the method plays a great role in energy conservation and consumption reduction of industrial and mining enterprises, production process improvement and environmental pollution reduction. However, the price of the existing power electronic products is still expensive due to the restriction of components, technology, production, circulation and other links.

Moreover, the types of power electronic products used in factories are increasing, such as: equipment such as a four-quadrant frequency converter, a single-phase frequency converter, a soft starter, an active filter APF, a static var generator SVG, a direct current power supply, an uninterruptible power supply UPS, a wind power grid-connected converter, a photovoltaic grid-connected inverter and a dynamic voltage restorer DVR are continuously developed, but the products have single functions and can only realize independent functions. Many expensive power electronic devices have to face the dilemma of idling due to factors such as the update of factory automation equipment and the adjustment of product lines.

[ Utility model ] content

In order to solve the above-mentioned technical problem that exists among the prior art, the utility model provides a can realize four-quadrant three-phase converter, single-phase converter, soft starter, active power filter APF, static var generator SVG, DC power supply, uninterrupted power source UPS, wind-powered electricity generation grid-connected converter, photovoltaic grid-connected inverter, two kinds or more in functions such as dynamic voltage restorer DVR, use in a flexible way, and is convenient, and is intelligent and reliable high, practices thrift investment cost, reduce the idle and extravagant general smart power grids power electronics device of equipment.

The utility model provides a technical scheme that prior art problem adopted does:

a universal intelligent power grid power electronic device comprises a control system, a main loop system and a mutual inductor Hall sensor module; wherein,

the control system mainly comprises a central processing unit module, an analog quantity processing module, an IGBT driving module, a switching quantity processing module and a man-machine interface module, wherein the analog quantity processing module, the IGBT driving module, the switching quantity processing module and the man-machine interface module are all in conductive connection with the central processing unit module;

the main loop system mainly comprises a front-end series reactor, a front-end inversion link, a front-end soft charging link, an intermediate direct current link, a rear-end soft charging link, a rear-end inversion link and a rear-end series reactor, and is sequentially connected in a conduction manner;

and the output end of the IGBT driving module is in conduction connection with the front end inversion link and the rear end inversion link, the output end of the switching value processing module is in conduction connection with the front end series reactor, the front end soft charging link, the rear end soft charging link and the rear end series reactor, the front end series reactor and the rear end series reactor are respectively provided with a front end connection port and a rear end connection port which are used for being connected with external power equipment to realize different functions, and two ends of the mutual inductor Hall sensor module are respectively in electrical connection with the analog value processing module and the main loop system.

Furthermore, the central processing unit module comprises a DSP processing chip, an FPGA logic chip and a FLASH storage chip which are sequentially connected in a conduction mode, the analog quantity processing module comprises a mutual inductor module, an AD processing module and a Hall module, the mutual inductor module and the Hall module are connected with the AD processing module in a conduction mode, the AD processing module is connected with the DSP processing chip and the FPGA logic chip in a conduction mode, and the switching quantity processing module and the human-computer interface module are respectively connected with the FPGA logic chip and the DSP processing chip in a conduction mode.

Further, the front-end series reactor and the rear-end series reactor are respectively composed of a series reactor L1 and a bypass contactor KM1, a series reactor L2 and a bypass contactor KM2 which are mutually connected in a conducting manner, the front-end soft charging link and the rear-end soft charging link are respectively composed of a soft charging resistor R1 and a bypass contactor KM3 which are mutually connected in a conducting manner, a soft charging resistor R2 and a bypass contactor KM4, and the output end of the switching value processing module is in conducting connection with the bypass contactors KM 1-KM 4.

Furthermore, the front-end inverter link and the rear-end inverter link are formed by connecting more than two half-bridge inverters in parallel, and the number of the half-bridge inverters is consistent with that of the reactors in the series reactors L1 and L2, and the half-bridge inverters are in one-to-one conduction connection.

Further, the front-end inverter link and the rear-end inverter link are respectively formed by connecting three half-bridge inverters A1-A6 and three half-bridge inverters B1-B6 in parallel, the series reactor L1 and the series reactor L2 are respectively formed by three reactors, and an A-C connection port and an X-Z connection port are respectively formed at the front end and the rear end.

Furthermore, the intermediate direct current link is composed of at least one capacitor and a power diode, and the capacitors and the power diode are connected in parallel.

The utility model has the advantages that:

in the technical scheme of the utility model, the user only needs to modify parameters and peripheral wiring, and can realize two or more than two of the functions of a four-quadrant three-phase frequency converter, a single-phase frequency converter, a soft starter, an active power filter APF, a static var generator SVG, a direct current power supply, an uninterruptible power supply UPS, a wind power grid-connected converter, a photovoltaic grid-connected inverter, a dynamic voltage restorer DVR and the like through the universal intelligent power grid power electronic device, various power electronic devices are integrated on one platform, thereby realizing the intellectualization and the reliability of the power grid, greatly saving the investment of the user, reducing the idle and the waste of the devices, playing different functions in different production periods of a factory, reserving an external interface simultaneously, and facilitating the user to reach the requirement of self-expanding capacity according to the recommendation of the manufacturer, the limitation that the electrical manufacturers produce equipment with different capacities to meet the single requirement of users is broken.

[ description of the drawings ]

Fig. 1 is a schematic block diagram of a first embodiment of a universal smart grid power electronic device according to the present invention;

fig. 2 is a schematic structural diagram of a universal smart grid power electronic device according to the present invention for implementing a four-quadrant three-phase frequency converter function;

fig. 3 is a schematic structural diagram of a universal smart grid power electronic device according to the present invention for implementing a single-phase inverter function;

fig. 4 is a schematic structural diagram of the universal smart grid power electronic device according to the present invention for implementing the function of the motor soft starter;

fig. 5 is a schematic structural diagram of a general smart grid power electronic device according to the present invention, which implements functions of an active power filter and a static var generator;

fig. 6 is a schematic structural diagram of the universal smart grid power electronic device according to the present invention for implementing a dc power supply function;

fig. 7 is a schematic structural diagram of a universal smart grid power electronic device according to the present invention for implementing an uninterruptible power supply function;

fig. 8 and fig. 9 are schematic structural diagrams illustrating a general smart grid power electronic device according to the present invention for implementing the function of the wind power grid-connected converter;

fig. 10 and fig. 11 are schematic structural diagrams illustrating a general smart grid power electronic device according to the present invention for implementing the function of a photovoltaic grid-connected inverter;

fig. 12 is a schematic structural diagram of a general smart grid power electronic device implementing a function of a voltage fast restorer.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 12:

the utility model provides a universal intelligent power grid power electronic device, which comprises a control system 1, a main loop system 2 and a mutual inductor Hall sensor module 3; the control system 1 mainly comprises a central processor module 11, an analog quantity processing module 12, an IGBT driving module 13, a switching quantity processing module 14 and a man-machine interface module 15, wherein the analog quantity processing module 12, the IGBT driving module 13, the switching quantity processing module 14 and the man-machine interface module 15 are all in conductive connection with the central processor module 11; the main loop system 2 mainly comprises a front-end series reactor 21, a front-end inversion link 22, a front-end soft charging link 23, an intermediate direct current link 24, a rear-end soft charging link 25, a rear-end inversion link 26 and a rear-end series reactor 27, and is sequentially connected in a conduction manner; moreover, the output end of the IGBT driving module 13 (for example, 2SD315 driver from conccept corporation) is conductively connected to the front-end inverter link 22 and the rear-end inverter link 26, and is mainly used for receiving a driving signal sent by the FPGA logic chip 112 to drive the front-end inverter link 22 and the rear-end inverter link 26; the output end of the switching value processing module 14 is in conduction connection with a front-end series reactor 21, a front-end soft charging link 23, a rear-end soft charging link 25 and a rear-end series reactor 27, and the front-end series reactor 21 and the rear-end series reactor 27 are further respectively provided with a front-end connection port 211 and a rear-end connection port 271 which are used for being connected with external power equipment to achieve different functions. The concrete structure is as follows: the central processor module 11 is the core of the control system 1, and includes a DSP processing chip 111 (e.g., TMS320F2812 processing chip of TI company), an FPGA logic chip 112 (e.g., EP3C16Q240 logic chip of Altera company) and a FLASH memory chip 113 which are connected in turn, and is mainly used for acquisition, operation processing, generation of PWM control signals, communication and other functions of analog quantities and switching quantities, and corresponding processing programs are stored in the externally extended FLASH memory chip 113; the analog quantity processing module 12 comprises a transformer module 121 (such as an LMZ1-0.5 current transformer and a JDG4-0.5 voltage transformer), an AD processing module 122 (such as an HCPL7840 isolation operational amplifier and an AD7605 conversion chip) and a Hall module 123 (such as an LT308-S6 current Hall module and an LV25-1000 voltage Hall), the transformer module 121 and the Hall module 123 are in conductive connection with the AD processing module 122, the AD processing module 122 is in conductive connection with a DSP processing chip 111 and an FPGA logic chip 112, the switching value processing module 14 and a man-machine interface module 15 are in conductive connection with the FPGA logic chip 112 and the DSP processing chip 111 respectively, the switching value processing module 14 is mainly used for isolation processing of input and output switching value signals, and functions of receiving of user control signals, detecting of equipment state switching values, indicating of equipment states, controlling contactors and the like, the input is isolated by an optocoupler (such as a TLP521-4 isolating optocoupler), the output is isolated by a relay (such as a JHC-5F024A-2H relay), and the human-computer interface 15 mainly realizes the functions of state viewing, parameter modification, fault indication, operation and the like of the user on the equipment; the front-end series reactor 21 and the rear-end series reactor 27 are respectively composed of a series reactor L1 and a bypass contactor KM1 which are mutually connected in a conducting manner, a series reactor L2 and a bypass contactor KM 2; the front-end inverter link 22 and the rear-end inverter link 26 are respectively formed by connecting three half-bridge inverters a 1-a 6 and three half-bridge inverters B1-B6 in parallel, the series reactor L1 and the series reactor L2 are respectively formed by three reactors, and a-C connection ports and X-Z connection ports are respectively formed at the front end and the rear end, the three half-bridge inverters a 1-a 6 and the three half-bridge inverters B1-B6 are respectively in one-to-one conduction connection with three reactors in the series reactor L1 and the series reactor L2 (of course, the front-end inverter link 22 and the rear-end inverter link 26 can also be formed by connecting more than two half-bridge inverters in parallel, and the number of the half-bridge inverters is consistent with the number of reactors in the series reactor L1 and the series reactor L2 and is in one-to-one conduction connection); the front-end soft charging link 23 and the rear-end soft charging link 25 are respectively composed of a soft charging resistor R1, a bypass contactor KM3, a soft charging resistor R2 and a bypass contactor KM4 which are mutually connected in a conducting manner, and the output end of the switching value processing module 14 is connected with the bypass contactors KM 1-KM 4 in a conducting manner; the intermediate dc link 24 is composed of at least one capacitor and a power diode, and they are connected in parallel.

In addition, the two ends of the mutual inductor hall sensor module 3 are respectively electrically connected with the analog quantity processing module 12 and the main loop system 2, the mutual inductor in the mutual inductor hall sensor module 3 is mainly used for collecting several groups of signals such as front-end and rear-end three-phase voltages of the front-end series reactor 21 and the rear-end series reactor 27, front-end and rear-end three-phase currents of the power electronic device, and grid-side three-phase currents, and the mutual inductor hall sensor module 3 is mainly used for collecting direct-current bus voltages and simultaneously transmitting the direct-current bus voltages to the control system 1 so as to monitor the running state of the main loop system 2.

The following is a detailed description of the various functions realized by the power electronic device according to the present invention.

(1) Four-quadrant three-phase converter: the device can be used for loads of common fans and water pumps, and can meet the requirements of hoisting equipment, equipment needing rapid braking and long-term heavy-load electric braking. In order to improve the electricity-saving effect and reduce the energy loss in the braking process, the deceleration energy is recycled and fed back to the power grid, and the effects of energy conservation and environmental protection are achieved. As shown in fig. 2, when the device realizes the function of a four-quadrant three-phase frequency converter, the a-C connection ports are connected with a three-phase power grid 41, and the X-Z connection ports are connected with a three-phase motor 42; when the three-phase motor 42 works in an electric state, the control system 1 generates 6 paths of PWM control signals (pulse signals) and controls the on and off of 6 IGBTs of three half-bridge inverters A1-A6 in the front-end inversion link 22 through the IGBT driving module 13, the on and off of the IGBTs and an input reactor (L1 or L2. When the three-phase motor 42 works in the second quadrant or the fourth quadrant, the bus voltage of the intermediate direct-current link 24 is increased, the three half-bridge inverters A1-A6 are in an inversion state, and electric energy is fed back to the power grid.

(2) Single-phase converter: the application is similar to a four-quadrant three-phase frequency converter, and the difference is only that: as shown in fig. 3, when the device realizes the function of a single-phase frequency converter, only the B, C connection port is connected with the three-box power grid 51, and the Y, Z connection port is connected with the three-phase motor 52.

(3) The motor soft starter comprises: the starting device is a novel starting device designed and produced by adopting a power electronic technology and a microprocessing technology, can effectively limit the starting current of the AC asynchronous motor during starting, and can be widely applied to loads such as fans, water pumps, conveying and compressors. As shown in fig. 4, when the device realizes the function of a motor soft starter, an a-C connection port is connected with a three-phase power supply 61, an X-Z connection port is connected with a three-phase asynchronous motor 62, and a bypass contactor 63 is arranged, wherein the front end and the rear end of the bypass contactor 63 are respectively connected with the a-C connection port and the X-Z connection port; the motor soft starter actually uses a frequency converter mode to operate a three-phase asynchronous motor 62 to 50Hz, and then a bypass contactor 63 is attracted to switch to a power frequency operation state.

(4) Active Power Filter (APF) and Static Var Generator (SVG): the dynamic harmonic wave suppression reactive power compensation device is a novel power electronic device for dynamically suppressing harmonic waves and compensating reactive power, and can compensate the harmonic waves with variable sizes and frequencies and the reactive power with variable sizes and frequencies. As shown in fig. 5, when the apparatus realizes the APF and SVG functions, the a-C connection ports and the X-Z connection ports are both connected to the three-phase power grid 71, the APF and SVG adopt the same circuit structure, and only the difference of the internal algorithms makes the apparatus in the state of compensating harmonic waves or compensating reactive power, specifically: when the function of an Active Power Filter (APF) is realized, the load current is detected through a current transformer in a transformer module 121, the harmonic component in the load current is extracted through calculation of a DSP processing chip 111, and then the harmonic component is sent to an internal IGBT through a PWM signal to control an inverter to generate a harmonic current which is equal to the load harmonic current in magnitude and opposite in direction and is injected into a power grid, so that the purpose of filtering is achieved; when the Static Var Generator (SVG) function is realized, the Static Var Generator (SVG) is connected in parallel to a power grid through a front-end series reactor 21 and a rear-end series reactor 27, the amplitude and the phase of output voltage at the alternating current side of a front-end inversion link 22 and a rear-end inversion link 26 are properly adjusted, or the current flowing through the front-end and rear reactors at the output side of a direct control device is rapidly absorbed or sent out, so that the purpose of rapidly and dynamically adjusting the reactive power is realized, the impact current of an impact type load can be tracked, and the harmonic current can also be tracked and compensated.

(5) A direct-current power supply: the device is used for maintaining a stable direct current power supply formed in a circuit. The direct current power supply system is suitable for large power plants, hydraulic power plants, ultrahigh voltage transformer substations and unattended transformer substations and is used as a direct current power supply for electric devices such as control, signal, protection, automatic reclosing operation, emergency lighting, direct current oil pumps, opening and closing of various direct current operating mechanisms, instruments of secondary circuits, control alternating current uninterrupted power supplies of automation devices and the like. As shown in fig. 6, when the apparatus implements the dc power supply function, the a-C connection ports and the X-Z connection ports are both connected to a three-phase power supply 81, the M and N connection ports are connected to the positive and negative electrodes of a battery 83 through a contactor 82, the contactor 82 is disconnected when the battery 83 is fully charged without a backup power supply, the dc power supply is provided by a capacitor in the intermediate dc link 24, and the contactor 82 is closed when the front-end power supply is de-energized, and the dc power supply is provided by the battery 83. And the PWM rectification mode of the UPS is also adopted, so that the voltage fluctuation of the direct current bus can be well controlled, the stability of the provided direct current power supply and the stability of the charging voltage and the charging current of the storage battery 83 are ensured, and the front-end inversion link 22 is adopted to realize the PWM rectification to charge the battery, so that harmonic pollution to a power grid can not be generated.

(6) Uninterruptible Power Supply (UPS): the uninterruptible power supply is a constant-voltage constant-frequency uninterruptible power supply which comprises an energy storage device and takes an inverter as a main component. When the mains supply input is normal, the UPS supplies the mains supply to the load for use after stabilizing the voltage of the mains supply, and the UPS is an alternating current mains supply voltage stabilizer and also charges a built-in battery; when the commercial power is interrupted (accident power failure), the UPS supplies the electric energy of the battery in the UPS to the load continuously by an inversion conversion method. As shown in fig. 7, when the apparatus implements the UPS function, the a-C connection ports are connected to a three-phase power grid 91, and the X-Z connection ports are connected to a three-phase load; m, N, two terminals are connected with the positive and negative electrodes of the storage battery 93 through a contactor 92, the contactor 92 is disconnected when the storage battery 93 is fully charged without a backup power supply, the back-end inverse direct current power supply is provided by the capacitor in the middle direct current link 24, the contactor 92 is closed when the front-end power supply is power-off, and the storage battery 93 provides the direct current power supply for the back-end inverse link 26; in addition, another contactor 94 may be connected externally, and the contactor 94 may be used to determine whether to directly supply external power or to provide stable and clean power through the UPS, or to select switching between the on-line mode and the off-line mode of the UPS. Because the front end adopts a PWM rectification mode, the voltage fluctuation of a direct current bus can be well controlled, the charging voltage and the charging current of the storage battery 93 are ensured to be stable, and the harmonic pollution of a front end rectification link to a power supply is reduced.

(7) Wind power grid-connected converter: the wind energy is converted into electric energy and is merged into a power grid, so that the active component of wind power generation can be transmitted to the power grid, and the reactive component at the power grid end can be connected and adjusted, thereby playing a role in reactive compensation. The wind power generator is divided into an asynchronous double-fed type and a permanent magnet direct-driven type, and corresponding wind power converters are different. As shown in fig. 8, when the device realizes the function of the wind power grid-connected converter, for the permanent-magnet direct-driven wind power generator, the a-C connection ports are connected with the output end of the permanent-magnet direct-driven wind power generator 101, the X-Z connection ports are connected with the three-phase power grid 102, and the electricity generated by the permanent-magnet direct-driven wind power generator 101 is inverted into PWM pulse signals through the rear-end soft-charging link 25 and the rear-end inversion link 26 and is grid-connected through the rear-end series reactor 27 after passing through the front-end series reactor 21, the front-end inversion link 22 and the PWM rectification of the front-end soft-charging link 23 of the device and the capacitor filtering in the intermediate direct-. As shown in fig. 9, for an asynchronous doubly-fed wind power generator, a grid-connected switch 103 is required to be added, an a-C connection port is connected with a rotor coil of an asynchronous doubly-fed wind power generator 104, a front end of the grid-connected switch 103 is connected with a stator coil of the asynchronous doubly-fed wind power generator 104, a rear end of the grid-connected switch 103 is connected with a three-phase power grid 105, an X-Z connection port is connected with the three-phase power grid 105, the device obtains power from a rear-end inversion link 26, outputs the three-phase power from a front-end inversion link 22 to provide excitation of the asynchronous doubly-fed wind power generator 104, adjusts an excitation current amplitude value, can adjust emitted active power, adjust an excitation current phase, adjust emitted reactive power, and achieve independent adjustment of the active power and the reactive power, so as to achieve the purpose of; therefore, the asynchronous doubly-fed wind generator 104 can absorb more reactive power through alternating current excitation, participate in reactive power regulation of the power grid, and solve the defect of the rise of the voltage fluctuation of the power grid, so that the operation efficiency, the electric energy quality and the stability of the power grid are improved; the asynchronous doubly-fed wind generator 104 can also accurately adjust the output voltage of the stator of the generator by implementing alternating current excitation on the rotor, so that the output voltage meets the grid connection requirement, and safe and quick flexible grid connection operation is realized.

(8) Photovoltaic grid-connected inverter: the device is used for converting direct current output by a solar cell into alternating current meeting the requirements of a power grid and inputting the alternating current into the power grid, and is the core of energy conversion and control of a grid-connected photovoltaic system. As shown in fig. 10 and 11, when the device implements the function of the photovoltaic grid-connected inverter, the device may be directly connected to the three-phase power grid 106 or connected to the three-phase power grid 106 through a transformer 107, that is, the a-C connection port and the X-Z connection port are directly connected to the three-phase power grid 106, or connected to the three-phase power grid 106 through two transformers 107 (TR 1 and TR 2). The device outputs voltage to a series reactor L1 and a series reactor L2 in a front end series reactor 21 and a rear end series reactor 27 through the inversion of a front end inversion link 22 and a rear end inversion link 26, and current generated on the series reactor L1 and the series reactor L2 flows into a three-phase power supply grid 106 or flows into the three-phase power supply grid 106 through a transformer 107.

(9) Voltage fast restorer (DVR): the series voltage compensation device has the capability of compensating active power besides reactive power, and can restore the voltage of a user side to a normal value within a few milliseconds when a voltage sag occurs in a system; the main function of the voltage compensation circuit is to inhibit dynamic and steady voltage drop, surge and flicker, has good dynamic voltage compensation capability, can effectively inhibit harmonic waves and three-phase imbalance, and improves the quality of electric energy; when the system voltage is interfered, the short-time voltage drop (several cycles to dozens of cycles) of the load side is the main reason of the sensitive load and the computer equipment failure, and the Dynamic Voltage Regulator (DVR) generates compensation voltage within 1-2 milliseconds to offset the interference of the system voltage, so that the voltage of the load side can not be disturbed, and the safe and reliable operation of the sensitive load and the computer load is ensured. The dynamic voltage regulator has high response speed, can ensure that the voltage waveform of a load side is a standard sine, and eliminates the influence of voltage harmonics and voltage fluctuation and flicker on the load. As shown in fig. 12, when the apparatus implements the function of the voltage fast restorer, the a-C connection ports are directly connected to the three-phase power grid 108, the X-Z connection ports are added with the coupling transformer 109 and the compensation capacitor 100 to be connected to the three-phase power grid 108, the neutral point of the coupling transformer 109 is connected to the key point (Q connection port) of the intermediate dc link 24 of the apparatus, the front-end inverter link 22 mainly provides the bus dc voltage, and the rear-end inverter link 26 inverts the voltage according to the actual condition of the grid and couples the voltage to the three-phase power grid 108 through the coupling transformer 109, so as to compensate and suppress the sudden rise and sudden fall of the grid voltage.

Thus, the user only needs to modify parameters and peripheral wiring, and can realize two or more than two of the functions of a four-quadrant three-phase frequency converter, a single-phase frequency converter, a soft starter, an active power filter APF, a static var generator SVG, a direct current power supply, an uninterruptible power supply UPS, a wind power grid-connected converter, a photovoltaic grid-connected inverter, a dynamic voltage restorer DVR and the like through the universal intelligent power grid power electronic device, various power electronic equipment is integrated on a platform, thereby realizing the intellectualization and the reliability of the power grid, greatly saving the investment of users, reducing the idle and the waste of equipment, playing different roles in different production periods of factories, meanwhile, an external interface is reserved in the device, so that a user can conveniently reach the requirement of capacity self-expansion according to the recommendation of a manufacturer, and the limitation that an electrical manufacturer produces equipment with different capacities to meet the single requirement of the user is broken.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (6)

1. A general smart grid power electronic device characterized in that: the system comprises a control system (1), a main loop system (2) and a mutual inductor Hall sensor module (3); wherein,

the control system (1) mainly comprises a central processing unit module (11), an analog quantity processing module (12), an IGBT driving module (13), a switching value processing module (14) and a human-computer interface module (15), wherein the analog quantity processing module (12), the IGBT driving module (13), the switching value processing module (14) and the human-computer interface module (15) are all in conductive connection with the central processing unit module (11);

the main loop system (2) mainly comprises a front-end series reactor (21), a front-end inversion link (22), a front-end soft charging link (23), an intermediate direct-current link (24), a rear-end soft charging link (25), a rear-end inversion link (26) and a rear-end series reactor (27), and is sequentially connected in a conduction manner;

moreover, the output end of the IGBT driving module (13) is in conduction connection with the front end inversion link (22) and the rear end inversion link (26), the output end of the switching value processing module (14) is in conduction connection with the front end series reactor (21), the front end soft charging link (23), the rear end soft charging link (25) and the rear end series reactor (27), the front end series reactor (21) and the rear end series reactor (27) are further respectively provided with a front end connection port (211) and a rear end connection port (271) which are used for being connected with external power equipment to achieve different functions, and the two ends of the mutual inductor Hall sensor module (3) are respectively electrically connected with the analog value processing module (12) and the main loop system (2).

2. The universal smart grid power electronic device as recited in claim 1, wherein: central processing unit module (11) is including DSP processing chip (111), FPGA logic chip (112) and FLASH memory chip (113) of turn-on connection in proper order, analog quantity processing module (12) including mutual-inductor module (121), AD processing module (122) and hall module (123), mutual-inductor module (121) and hall module (123) with AD processing module (122) turn-on connection, AD processing module (122) with DSP processing chip (111) and FPGA logic chip (112) turn-on connection, switching value processing module (14) and man-machine interface module (15) respectively with FPGA logic chip (112) and DSP processing chip (111) turn-on connection.

3. A universal smart grid power electronic device as claimed in claim 1 or 2, wherein: the front-end series reactor (21) and the rear-end series reactor (27) are respectively composed of a series reactor L1, a bypass contactor KM1, a series reactor L2 and a bypass contactor KM2 which are mutually connected in a conducting manner, the front-end soft charging link (23) and the rear-end soft charging link (25) are respectively composed of a soft charging resistor R1, a bypass contactor KM3, a soft charging resistor R2 and a bypass contactor KM4 which are mutually connected in a conducting manner, and the output end of the switching value processing module (14) is in conducting connection with the bypass contactors KM 1-KM 4.

4. The universal smart grid power electronic device as recited in claim 3, wherein: the front-end inversion link (22) and the rear-end inversion link (26) are formed by connecting more than two half-bridge inverters in parallel, and the number of the half-bridge inverters is consistent with that of the reactors in the series reactor L1 and the series reactor L2 and is in one-to-one conduction connection.

5. The universal smart grid power electronic device as recited in claim 4, wherein: the front-end inversion link (22) and the rear-end inversion link (26) are respectively formed by connecting three half-bridge inverters A1-A6 and three half-bridge inverters B1-B6 in parallel, the series reactor L1 and the series reactor L2 are respectively formed by three reactors, and an A-C connection port and an X-Z connection port are respectively formed at the front end and the rear end.

6. The universal smart grid power electronic device as recited in claim 5, wherein: the intermediate direct current link (24) is composed of at least one capacitor and a power diode, and the capacitors and the power diode are connected in parallel.

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