TW202007067A - Wind power plant and control method of wind power plant Enabling the power generation output of wind power plant to match an upper limit value without using a communication equipment in high speed wide area - Google Patents

Abstract

To provide a wind power plant and control method of wind power plant capable of enabling the power generation output of wind power plant to match an upper limit value without using a communication equipment in high speed wide area. A wind power plant 9 has: a plurality of wind power generation devices 5a, 5b, 5c of generating power by receiving wind energy, a windmill controller 517a for controlling the power generation output of the wind power generation devices, and a power line sensor 8 for measuring the combined power output of a portion of the wind power generation devices 5b, 5c in the plurality of wind power generation devices 5a, 5b, 5c. At least a first windmill controller 517a for controlling the first wind power generation device 5a determines the power generation command value of the first power generation device 5a based upon the measured value of the combined power output of the portion of the wind power generation devices 5b, 5c measured by the power line sensor 8.

Description

Wind power plant and control method of wind power plant

The present invention relates to a wind power plant equipped with a plurality of wind power generators that use wind energy to generate electricity and a control method of the wind power plant.

Reducing the amount of carbon dioxide emissions considered to be the cause of global warming is a major issue. As one of the measures to reduce carbon dioxide emissions, the introduction of a wind power plant group composed of more than two wind power plants (hereinafter referred to as wind power plants) is prevailing. Although there are many cases where wind power plants are connected to the power system, it is worrying that the wind speed fluctuates and the power generation output fluctuates, causing the frequency of the power system connected to the destination to be adversely affected. As one of its measures, a scheme is proposed to set an upper limit on the power generation output of a wind power plant to suppress the frequency increase of the power system. For example, Patent Document 1 discloses a method of using a power plant controller that centrally controls a plurality of wind power generators to make the power generation output of the wind power plant coincide with a predetermined upper limit value. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Special Publication No. 2016-521538

[Problem to be solved by invention]

However, in the configuration described in Patent Document 1, the power plant controller must gradually update the output upper limit commands of all wind power generators in the wind power plant in accordance with changes in the power generation output of the wind power plant. Since the power generation output of a wind power plant may fluctuate at intervals of several seconds due to changes in wind speed, the power plant controller requires high-speed communication equipment. In addition, in order to connect hundreds of wind power generators to large-scale wind power plants, wide-area communication equipment is required. Therefore, in the configuration described in Patent Document 1, there arises a problem that a high-speed wide-area communication device needs to be installed in a power plant controller. Therefore, the present invention provides a wind power plant and a control method for a wind power plant that does not use high-speed wide-area communication equipment, and enables the power generation output of the wind power plant to be consistent with the upper limit value. [Means to solve the problem]

To solve the above problems, the wind power plant of the present invention is characterized by: have: A plurality of wind power generators that receive wind energy to generate electricity, a windmill controller for controlling the power generation output of the wind power generator, and a transmission line sensor that measures the combined power output of the wind power generators of some of the plurality of wind power generators At least a first windmill controller for controlling the first wind turbine generator, and determining the first wind turbine generator based on the measured value of the combined power generation output of the wind turbine generator measured by the power line sensor The power generation command value of the device.

In addition, the control method of the wind power plant of the present invention is provided with a plurality of wind power generators that receive wind energy to generate electricity, a windmill controller for controlling the power generation output of the wind power generator, and measuring the plurality of wind powers A control method of a wind power plant in which a transmission line sensor of a combined power generation output of a wind power generator of a part of a power generator is characterized by at least a first windmill controller for controlling the first wind power generator, according to The measured value of the combined power generation output of the wind power generator measured by the power line sensor determines the power generation command value of the first wind power generator. [Effect of the invention]

According to the present invention, it is possible to provide a wind power plant and a control method of a wind power plant that do not use high-speed wide-area communication equipment and can make the power generation output of the wind power plant consistent with the upper limit value. Problems, configurations, and effects other than the above will be apparent as described in the following embodiments.

[Form for carrying out the invention]

Hereinafter, the embodiments of the present invention will be described using the drawings. [Example 1]

Fig. 1 is an overall schematic diagram of a wind power plant according to Embodiment 1 of the present invention. As shown in FIG. 1, the wind power plant 9 of this embodiment is connected to the power system control station 6 through the communication network 12 and can be connected to each other, and the connection point 2 is used as the connection point to connect the wind power plant 9 Power system at the destination 1. Here, the communication network 12 can be wired or wireless. In addition, the wind power plant 9 consists of: connection transformer 3, transmission line 4 (4a, 4b, 4c), wind power generator 5 (5a, 5b, 5c), power plant controller 7, transmission line sensor 8, The wide area low speed communication 10 and the local high speed communication 11 are formed. The wind power generator 5 is connected to the connection point 2 through the transmission line 4 and the connection transformer 3. Furthermore, in the first figure, in the wind power plant 9, three wind power generators 5 of the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c are transmitted through the transmission line 4a, the transmission line 4b, and The case where the transmission line 4c is provided in series with the connection transformer 3 is shown as an example. However, the number of wind power generators 5 installed in the wind power plant 9 is not limited to this. For example, it may be a configuration in which two wind power generators 5 are installed, or four or more wind power generators 5 are installed.

As shown in Figure 1, the power plant controller 7 receives the power plant output upper limit command from the power system control station 6 through the communication network 12, and sends the wind turbine output upper limit command through wide area low-speed communication 10 (for example, a 20-minute cycle) To the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c. Here, the power plant controller 7 is installed in, for example, a building in the wind power plant 9. In order to suppress the frequency variation of the electric power system 1 within a predetermined value, the electric power system control unit 6 takes the role of outputting adjustment commands to wind power plants and thermal power plants. The power transmission line sensor 8 transmits the power flow measurement value of the power transmission line 4b to the wind power generator 5a through the local high-speed communication 11 (for example, one second period). Instead of the local high-speed communication 11, the analog output of the voltage sensor and the current sensor constituting the transmission line sensor 8 may be matched. Furthermore, the power flow of the transmission line 4b is the combined power generation output of the wind power generator 5b and the wind power generator 5c. Regarding other power transmission lines, the power generation output that flows into the wind power generator 5c to the power transmission line 4c. In addition, to the power transmission line 4a, the combined power generation output of all the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c flows.

Next, the configurations of the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c will be described using FIGS. 2 and 3. FIG. 2 shows a schematic configuration of one of the wind power generators 5b installed in the wind power plant 9 shown in FIG. 1, and FIG. 3 shows another of the wind power plants 9 installed in the first FIG. A diagram of the schematic configuration of the wind power generator 5a. In addition, since the structure of the wind power generator 5c is the same as the structure of the wind power generator 5b, the description is omitted below.

As shown in FIG. 2, the wind power generator 5b includes a wind blade 54b that rotates upon receiving wind, a hub 52b for supporting the wind blade 54b, a windmill body (not shown), and a rotatable tower that supports the windmill body (Not shown). The wind turbine body (not shown) includes a rotating shaft 55b connected to the blade hub 52b and rotating together with the blade hub 52b, and a generator 56b connected to the rotating shaft 55b to rotate the rotor to generate power generation operation. The part that transmits the rotational energy of the wind blade 54b to the generator 56b is called a power transmission unit. In addition, the rotor is constituted by the wind blades 54b and the hub 52b. In addition, the wind power generator 5b includes an anemometer 51b, a variable pitch mechanism 53b, an AC voltage sensor (57b, 515b), an AC current sensor (58b, 514b), a rotation speed detector 59b, and effective power The calculation unit 510b, the transformer 511b, the DC voltage sensor 512b, the inverter 513b, the step-up transformer 516b, and the windmill controller 517b.

The anemometer 51b is used to measure the wind speed (wind speed) to which the wind blade 54b is subjected. The wind energy received by the wind blade 54b is transmitted to the generator 56b through the variable pitch mechanism portion 53b, the hub 52b, and the rotating shaft 55b. The generator 56b converts wind energy into power generation output (electric energy), and sends the power generation output to the transformer 511b. The transformer 511b controls the AC of the generator 56b according to the measured values of the AC voltage sensor 57b and the AC current sensor 58b, and the target value of the power generation output P _G2 ^* (the power generation output is effective power) instructed by the windmill controller 517b Voltage and AC current. In addition, the transformer 511b converts the AC voltage and AC current of the generator 56b into a DC voltage and DC current, and sends the DC voltage and DC current to the inverter 513b. The inverter 513b controls the DC voltage between the transformer 511b and the inverter 513b and the reactive power of the inverter 513b based on the DC voltage sensor 512b, the AC voltage sensor 515b, and the AC current sensor 514b Output. In addition, the inverter 513b inversely converts the DC voltage and DC current sent from the transformer 511b into AC voltage and AC current, and sends the power generation output of the generator 56b to the step-up transformer 516b. The voltage of the step-up transformer 516b is stepped up, and the power generation output is sent to the transmission line 4b.

The rotation speed detector 59b detects the rotation speed ωr of the generator 56b from the AC voltage measurement value of the AC voltage sensor 57b. The effective power calculation unit 510b calculates the power generation output _PG (effective power) of the generator 56b from the AC voltage measurement value of the AC voltage sensor 57b and the AC current measurement value of the AC current sensor 58b.

Windmill controller 517b, based on the wind speed measurement value V _W using the anemometer 51b, the wind turbine output upper limit command value P _{WT_UL} ^* instructed by the power plant controller 7 using the wide-area low-speed communication 10 (FIG. 1 ), by the rotation speed The rotation speed ωr of the generator 56b detected by the detector 59b and the power generation output P _G of the generator 56b calculated by the effective power calculation unit 510b determine the power generation output target value P _G2 ^* and the pitch angle target value θ _PITCH ^* . The windmill controller 517b sends the power generation output target value P _G2 ^* to the transformer 511b, and sends the pitch angle target value θ _PITCH ^* to the variable pitch mechanism part 53b. Transformer 511 b, the power generation output is the output power target value of tracking P _G2 P _G transmitted from the wind turbine controller 517b ^* a way to control the output current of the generator 56b. The variable pitch mechanism unit 53b adjusts the pitch angle (angle of the wind blade relative to the wind direction) of the wind blade 54b so as to match the target pitch angle value θ _PITCH ^* sent from the windmill controller 517b.

As shown in FIG. 3, the wind power generator 5a is different from the wind power generator 5b and the wind power generator 5c in that the power flow measurement value P _LINE (wind power generator 5b) of the transmission line sensor 8 is input to the windmill controller 517a And the measurement value of the combined power generation output of the wind power generator 5c). Windmill controller 517a, based on the wind speed measurement value V _W by the anemometer 51a, the wind turbine output upper limit command value P _{WT_UL} * commanded by the power plant controller 7 via the wide area low speed communication 10 (Figure 1), by the rotation speed The rotation speed ωr of the generator 56a detected by the detector 59a, the power generation output _PG calculated by the effective power calculation unit 510a, and the power flow measurement value P _LINE from the transmission line sensor 8 determine the power generation output target value P _G2 * and the target value of pitch angle θ _PITCH *. In other words, the wind turbine controller 517a determines that the measurement value of the combined power generation output of the other wind power generator 5b and the wind power generator 5c (the power flow measurement value P _{LINE of the} transmission line sensor 8) is excessively insufficient, and obtains the power generation output target The value P _G2 * makes the power generation output P _G of the wind power generator 5 a become the determined power generation output target value P _G2 *, and controls the output current of the generator 56 a. In addition, the details will be described later. The anemometer 51a to step-up transformer 516a of the constituent elements of the wind power generator 5a shown in FIG. 3 are the same as the anemometer 51b to step-up transformer 516b of the wind power generator 5b shown in FIG. 2 described above. Function, detailed description is omitted here.

Next, the power plant controller 7 will be described using Figures 4 and 5. FIG. 4 shows a schematic configuration of the power plant controller 7 provided in the wind power plant 9 shown in FIG. 1, and FIG. 5 shows an example of a table stored in the control table memory device 74 shown in FIG. 4. Figure.

As shown in FIG. 4, the power plant controller 7 includes a reception unit 71, a windmill output upper limit determination unit 72, a transmission unit 73, and a control table memory device 74. The receiving unit 71 obtains the power plant output upper limit command value instructed through the communication network 12 from the power system control office 6. The windmill output upper limit determining unit 72 determines each wind power generator 5a, wind power generator 5b, and wind power generator 5c based on the power plant output upper limit command acquired at the receiving unit 71 and the table stored in the control parameter memory device 74 Windmill output upper limit command value. The transmission unit 73 transmits the windmill output upper limit command value determined by the windmill output upper limit determination unit 72 to each wind power generator 5a, the wind power generator 5b, and the wind power generator 5c through the wide-area low-speed communication 10.

As shown in FIG. 5, the control table memory device 74 constituting the power plant controller 7 is stored in a table format corresponding to the identification number of each wind power generator and the output upper limit distribution ratio (%). In the example shown in Figure 5, "wind power generator identification number" "5a" corresponds to "output upper limit distribution ratio (%)" "100", "wind power generator identification number" "5b" corresponds to "output upper limit The distribution ratio (%)" "50" and the "wind turbine identification number" "5c" are stored corresponding to the "output upper limit distribution ratio (%)" "50".

The wind turbine output upper limit determining unit 72 determines each wind power generator 5a, wind power generator 5b, and wind power generation based on the following formula (1) from the power plant output upper limit command and the output upper limit distribution ratio shown in the table of FIG. 5 The windmill of the device 5c outputs an upper limit command value. P _{WT_UL} ^* (i)=P _{WF_UL} ^* ×α(i)/100 ･･･(1) Here, P _{WT_UL} ^* (i) is the wind turbine output upper limit command value, P _{WF_UL} ^* is the power plant output upper limit command value, α(i) is the output upper limit distribution ratio, and i is the identification number of the wind power generator (5a, 5b, 5c).

Here, a method for determining the wind turbine output upper limit command value P _{WT_UL} ^* by substituting a specific numerical value into the formula (1) for the wind turbine output upper limit determining unit 72 constituting the power plant controller will be described.

For example, when the power plant output upper limit command value P _{WF_UL} ^* is _{6 MW} , the windmill output upper limit determining unit 74 _uses the output distribution ratio shown in FIG. 5 according to the above equation (1), and the windmill output upper limit command value P _{WT_UL} ^* respectively: The wind power generator 5a is 6MW, the wind power generator 5b is 3MW, and the wind power generator 5c is 3MW. The wind power generator 5b and the wind power generator 5c respectively control the power generation output P _{G of the} generator 56b and the generator 56c to 3MW of the wind turbine output upper limit command value P _{WT_UL} ^* . On the other hand, the wind power generator 5a sums the power generation output _{PG of the} generator 56a and the power flow measurement value P _LINE (the combined power generation output of the wind power generator 5b and the wind power generator 5c) of the transmission line sensor 8, Control the 6MW of the wind turbine output upper limit command value P _{WT_UL} ^* . Furthermore, when the respective power generation output _{PG of the} wind power generator 5b and the wind power generator 5c coincides with the 3MW of the wind turbine output upper limit command value P _{WT_UL} ^* , the combined output is _{6 MW} , which is the same as the power plant output upper limit command value P _{WF_UL} ^* 6MW matches, so the power generation output of the wind power generator 5a is 0MW.

In addition, assuming that the rated output of the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c are all 5 MW, the power generation output _{PG of the} wind power generator 5b coincides with the 3MW of the wind turbine output upper limit command value P _{WT_UL} ^* , and the wind power generator When each power generation output P _G of 5c is 2 MW and does not match the 3 MW of the wind turbine output upper limit command value P _{WT_UL} ^* , the combined output of the wind power generator 5 b and the wind power generator 5 c is 5 MW, relative to the power plant output upper limit command value P The 6MW of _{WF_UL} ^* is less than 1MW. At this time, the generator 56a is adjusted so that the power generation output _PG of the wind power generator 5a is 1 MW, and the total value of the power generation output _PG of the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c is 6 MW. The 6MW of the power plant output upper limit command value P _{WF_UL} ^* is consistent. That is, the wind power generator 5a adjusts the power generation output _PG to compensate for the shortage when the respective power generation outputs P _G of the wind power generator 5b and the wind power generator 5c are insufficient relative to the wind turbine output upper limit command value P _{WT_UL} ^* .

Next, the structures of the windmill controller 517a constituting the wind turbine generator 5a, the windmill controller 517b constituting the wind turbine generator 5b, and the windmill controller 517c constituting the wind turbine generator 5c will be described using FIGS. 6 and 7. FIG. 6 shows a schematic configuration of the windmill controller 517b constituting the wind power generator 5b shown in FIG. 2, and FIG. 7 shows a schematic configuration of the windmill controller 517a constituting the wind power generator 5a shown in FIG. 3. Figure. In addition, since the structure of the windmill controller 517c constituting the wind turbine generator 5c is the same as the structure of the windmill controller 517b constituting the wind turbine generator 5b, the description will be omitted below.

As shown in FIG. 6, the windmill controller 517b constituting the wind power generator 5b includes a maximum power tracking controller 5171b (MPPT: Maximum power point tracking), a subtractor, and a rotation speed controller 5172b (ASR: Auto speedregulator), And the limiter 5173b structure.

The maximum power tracking controller 5171b (MPPT) inputs the anemometer speed value V _W by the anemometer 51b and the power generation output P _G calculated by the effective power calculation unit 510b to calculate the rotation speed command value that maximizes the power generation output P _G ωr ^* . The subtractor calculates the difference between the rotation speed command value ωr ^* calculated by the maximum power tracking controller 5171b (MPPT) and the rotation speed measurement value ωr of the generator 56b detected by the rotation speed detector 59b, and the calculation result The difference is output to the rotation speed controller 5172b (ASR). The rotation speed controller 5172b (ASR), the difference input from the subtractor is zero, that is, the rotation speed command value ωr ^* and the rotation speed measurement value ωr of the generator 56b detected by the rotation speed detector 59b are Consistent way to determine the target value of power generation output before suppression P _G1 ^* and the target value of pitch angle θ _PITCH ^* . The rotation speed controller 5172b (ASR) outputs the determined pre-suppression power generation output target value P _G1 ^* to the limiter 5173b, and sends the pitch angle target value θ _PITCH ^* to the variable pitch mechanism unit 53b. Limiter 5173b, was calculated to be suppressed before generating the output target value P _G1 ^* upper limit of the wind turbine output command value _P WT_UL ^* the upper limit of the target value of the power generation output P _G2 ^*. Furthermore, when the power generation output is suppressed to increase the rotation speed measurement value ωr, the rotation speed controller 5172b (ASR) adjusts the pitch angle target value θ _PITCH ^* to suppress the increase in the rotation speed measurement value ωr. The limiter 5173b transmits the calculated power generation output target value P _G2 ^* to the transformer 511b.

As shown in FIG. 7, the wind turbine controller 517a constituting the wind power generator 5a is different from the wind turbine controller 517b constituting the wind power generator 5b shown in FIG. 6 in that it receives power from the power line sensor 8 This is the measured value of the power flow P _LINE ^* . Furthermore, the windmill controller 517a subtracts the power flow measurement value (wind power generator 5b and wind power generator 5c) from the wind turbine output upper limit command value P _{WT_UL} ^* (the same value as the power plant output upper limit command value P _{WF_UL} ^* ) The value P _{WT_UL} 2 ^* (measured value of the combined power generation output) (the deficiency of the upper limit command relative to the power generation output of the power plant) is input to the limiter 5173a. Since the other configuration of the windmill controller 517a is the same as that of the windmill controller 517b, the description is omitted.

Next, the operation of the entire wind power plant 9 will be described. FIG. 8 shows a flowchart of the operation of the entire wind power plant 9 shown in FIG. 1. As shown in FIG. 8, in step S101, the power system control station 6 sets the initial value of the power plant output upper limit command value P _{WF_UL} ^* . Here, as the initial value of the power plant output upper limit command value P _{WF_UL} ^* , the rated output (maximum output) of the wind power plant 9 is set. In step S102, it is determined whether the power plant controller 7 receives the power plant output upper limit command value P _{WF_UL} ^* from the power system control station 6 through the communication network 12. As a result of the determination, if the power plant output upper limit command value P _{WF_UL} ^{* has} not been received, the process proceeds to step S104. On the other hand, as a result of the determination, when receiving the power plant output upper limit command value P _{WF_UL} ^* , the process proceeds to step S103. Furthermore, the period of receiving the power plant output upper limit command value P _{WF_UL} ^* from the power system control office 6 through the communication network 12, for example: setting 1 hour.

In step S103, for example, the power plant controller 7 updates the power plant output upper limit command value P _{WF_UL} ^* received every one hour period, and proceeds to step S104. In step S104, the wind turbine output upper limit determining unit 72 constituting the power plant controller 7 determines each wind power generator 5a, wind power generator 5b, and each of the wind power generators 5a, 5b using the received power plant output upper limit command value P _{WF_UL} ^* according to the above equation (1) The wind turbine output upper limit command value P _{WT_UL} ^{* of the} wind power generator 5c. Then, the determined wind turbine output upper limit command value P _{WT_UL} ^* for each wind power generation device is caused to be transmitted to each wind power generation device via the wide area low-speed communication 10 by the transmission unit 73 constituting the power plant controller 7. Here, the sending cycle of the windmill output upper limit command value P _{WT_UL} ^{* is} the same as the receiving cycle of the above power plant output upper limit command value P _{WF_UL} ^* , for example: setting 1 hour.

In step S105, it is determined whether the wind power generator at the transmission destination of the upper limit command value P _{WT_UL} ^* of the windmill is the wind power generator 5a using the measured value of the transmission line sensor 8 and is not the wind power generator 5a, that is, the windmill When the upper limit command value P _{WT_UL} ^* is output and the destination wind power generator is the wind power generator 5b and the wind power generator 5c, the process proceeds to step S109. On the other hand, when the transmission destination is the wind power generator 5a using the measured value of the transmission line sensor 8, the process proceeds to step S106.

In step S106, it is determined whether the windmill controller 517a constituting the wind power generator 5a is a power flow measurement value P _LINE (measured value of the combined power generation output of the wind power generator 5b and the wind power generator 5c) received by the transmission line sensor 8 . In this reception cycle, for example: set 1 second. When the electric power flow measurement value P _LINE is not received by the transmission line sensor 8, the process proceeds to step S111. On the other hand, when the electric power flow measurement value P _LINE is received by the transmission line sensor 8, it proceeds to step S107. In step S107, the windmill controller 517a constituting the wind power generator 5a receives the power generation output _PG (effective power) of the wind power generator 5a calculated by the effective power calculation unit 510a, and proceeds to step S108. In step S108, the wind turbine controller 517a constituting the wind power generator 5a subtracts the power of the transmission line sensor 8 from the wind turbine output upper limit command value P _{WT_UL} * (the same value as the power plant output upper limit command value P _{WF_UL} *) The value P _{WT_UL} 2* (the shortage of the upper limit command relative to the power plant power generation output) of the power flow measurement value P _LINE (measured value of the combined power generation output of the wind power generator 5b and the wind power generator 5c) is input to the limiter 5173a. By this, the total output of the power flow measurement value P _LINE (measured value of the combined power generation output of the wind power generator 5b and the wind power generator 5c) and the power generation output P _G (effective power) of the wind power generator 5a is controlled to track the upper limit of the windmill output Command value P _{WT_UL} * (the same value as the power plant output upper limit command value P _{WF_UL} *). And it proceeds to step S111.

In step S109, the windmill controller 517b constituting the wind power generator 5b receives the power generation output _PG calculated by the effective power calculation unit 510b. In step S110, the windmill controller 517b sets the windmill output upper limit command value P _{WT_UL} * received by the power plant controller 7 to the upper limit value of the limiter 5173b, and adjusts each update cycle (for example: 1 hour) to Step S111.

In step S111, it is determined whether the wind power plant 9 is in operation. When the wind power plant 9 is stopped or not in operation, the operation is ended. On the other hand, when the wind power plant 9 is in operation, the processes of steps S102 to S110 described above are repeatedly executed.

Next, according to the wind power plant 9 of the present embodiment, the principle of making the power generation output of the wind power plant 9 coincide with the output upper limit command for communication equipment that does not use high-speed wide area is explained using FIGS. 9 and 10. FIG. 9 is a graph illustrating the power generation output of the wind power generator of this embodiment. In a single time section, examples of each possible power generation output 13 (13a of each wind power generator 5a, wind power generator 5b, and wind power generator 5c , 13b, 13c), one of the power generation output 14 (14a, 14b, 14c), and the wind turbine output upper limit command value 15 (15b, 15c). Furthermore, the wind turbine generator 5a sets a wind turbine output upper limit command value with respect to the combined output of the wind turbine generator 5a, the wind turbine generator 5b, and the wind turbine generator 5c. Therefore, the wind turbine output upper limit command value 15a of the wind power generator 5a is not shown in FIG. 9. As shown in FIG. 9, in the wind power generator 5c, the possible power generation output 13c is increased via the wind turbine output upper limit command value 15c, so by suppressing the power generation output, the wind turbine output upper limit command value 15c and the power generation output 14c are matched. In the wind power generator 5b, the possible power generation output 13b is reduced via the wind turbine output upper limit command value 15b. Therefore, for the wind turbine output upper limit command value 15b, the power generation output 14b is smaller than the insufficient portion 16b. In the wind power generator 5a, the power generation output 14a is adjusted, and the insufficient portion 16b of the wind power generator 5b is adjusted to generate power.

FIG. 10 is a graph illustrating the combined power generation output of the wind power plant 9 of the present embodiment, and shows one example of a graph of the power plant power generation output and the power plant output upper limit command value on the horizontal axis of time. The power generation output of the power plant is a combined value of the power generation outputs 14 (14a, 14b, and 14c) of each wind power generator 5a, wind power generator 5b, and wind power generator 5c. Therefore, FIG. 10 also shows the power generation output 14 (14a, 14b, 14c). As shown in FIG. 10, the power plant output upper limit command value 17 is updated by the power system control unit 6 at time t (t0, t1, t2, t3). The power plant controller 7 updates the wind turbine output upper limit command value 17 to update the wind turbine output upper limit command value to times t1 and t2. Then, the wind turbine output upper limit command value is sent to each wind power generator 5a, wind power generator 5b, and wind power generator 5c. The update period of the power plant output upper limit command value 17 and the windmill output upper limit command value, for example: 20 minutes.

As described in FIG. 9 above, when the combined power generation output (14b+14c) of the wind power generator 5b and the wind power generator 5c is smaller than the power plant output upper limit command value 17, the supply and its shortage ( For example: 16b shown in Figure 9) The same amount of power generation output (13a). In addition, the wind power generation device 5a can detect the deficiency (for example: shown in FIG. 9) by the transmission line sensor 8 shown in FIG. 3 and the local high-speed communication 11 (e.g., 1 second cycle) 16b).

As described above, according to this embodiment, without using a high-speed wide-area communication device, it is possible to provide a wind power plant and a control method of the wind power plant that can make the power generation output of the wind power plant consistent with the upper limit value. Specifically, when the power generation output of the power plant is limited to a predetermined upper limit value, the transmission line sensor 8 and the local high-speed communication 11 can make the power generation output of the power plant coincide with the upper limit value. Thereby, it is possible to reduce the capacity of the wind power plant 9 without enhancing the equipment for changing the wide-area low-speed communication 10 between the connected power plant controller 7 and each wind power generator 5a, wind power generator 5b, and wind power generator 5c to high-speed communication. Equipment costs. In addition, by making the power generation output of the power plant coincide with the upper limit value, the power supplied to the power system 1 can be maximized by the wind power plant 9 within the restricted range, which contributes to the reduction of carbon dioxide emissions. <Modification of Example 1> FIG. 11 is a graph illustrating a power plant output upper limit command in Modification 1 of Embodiment 1, and FIG. 12 is a table illustrating a power plant output upper limit command in Modification 1 of Embodiment 1. FIG. The power plant output upper limit command and windmill output upper limit command in Embodiment 1 described above can replace the upper limit value (W: watt) of the power generation output as the time change rate (W/min) of the power generation output. FIG. 11 shows a graph of the power plant output upper limit command with the horizontal axis as the time when the power plant output upper limit command is the time change rate of the power generation output. In Fig. 11, the rise time change of the power generation output of the power plant from time t1 to t2 is limited to (P2-P1)/(t2-t1) or less. The power plant controller 7 converts the power plant output upper limit command shown in FIG. 11 into a table corresponding to the time shown in FIG. 12 and the power plant output upper limit command, and sends it to each wind power generator 5a, wind power generator 5b , And wind power generator 5c. With this, it can be realized with the same configuration as in the first embodiment. [Example 2]

Fig. 13 is a diagram showing the overall configuration of a wind power plant 9a according to Example 2 of another embodiment of the present invention. In the wind power plant 9a of the present embodiment, the wind power generator (5a, 5b, 5c), the transmission line (4a, 4b, 4c), and the wind power generator (5d, 5e) of the same configuration as the transmission line sensor 8 5f), the transmission line (4e, 4f, 4g), and the transmission line sensor 8a are different from Embodiment 1 in that they are connected in parallel to the connection transformer 3. In addition, it differs from Example 1 in that the switch 18 (18a, 18b, 18c, 18d, 18e) and the transmission line (4d, 4h) are added. A switch 14e is arranged between the transmission lines 4d and 4h. The switch 14 (a, b, c, d, e) can switch between open and closed states, and electrically connect or disconnect the transmission lines at both ends. In the following, the same components as those in the first embodiment are given the same symbols, and descriptions that are the same as those in the first embodiment are omitted.

Fig. 14 shows a schematic configuration of a power plant controller 7a provided in the wind power plant 9a shown in Fig. 13. As shown in FIG. 14, the configuration of the power plant controller 7a of this embodiment is different from that of the power plant controller 7 of the first embodiment described above, and the opening and closing state of the switch 18 is acquired by the receiving unit 71a. The windmill output upper limit determining unit 72a determines each wind power generation based on the power plant output upper limit command instructed by the power system control unit 6 through the communication network 12, the opening and closing state of the switch 14, and the table stored in the control table memory device 74a The windmill of the device 5 outputs the upper limit command value. The wind turbine output upper limit command value is sent to each wind power generator 5 by the signaling unit 73.

FIG. 15 shows an example of a table stored in the control table storage device 74a shown in FIG. 14. As shown in FIG. 15, the control table memory device 74a constituting the power plant controller 7a corresponds to the opening and closing status of the switch 18, the windmill number, the use of transmission line sensors, and the output upper limit distribution ratio (%), Save in table form. The wind turbine output upper limit determining unit 72a constituting the power plant controller 7a is divided into three types (forms 1, 2, and 3 shown in FIG. 14) of output upper limit distribution ratios according to the combination of the opening and closing states of the switch 18.

Fig. 16 is a diagram showing the wiring (form 1) of the wind power plant 9a of this embodiment. As shown in Fig. 15, in the form 1, "the opening and closing state of the switch", "the switch 18a and the switch 18b" and "the switch 18c and the switch 18d" are all the "closed state", and only the "switch" "18e" is "on state". Therefore, as shown in FIG. 16, the transmission line 4d and the transmission line 4h are disconnected. This state is the same as the wind power generator 5a, the wind power generator 5b, and the wind power generator 5c of the first embodiment described above, as long as the wind power generator 5d, the wind power generator 5e, and the wind power generator 5f are controlled.

Fig. 17 is a diagram showing the wiring (form 2) of the wind power plant 9a of this embodiment. As shown in FIG. 15, in the form 2, "the open and closed state of the switch", "the open and close device 18a and the open and close device 18b" are the "closed state", and the "open and closed device 18c and the open and closed device 18d" are the "open state", The "switch 18e" is in the "closed state". Therefore, as shown in FIG. 17, the connection transformer 3 and the transmission line 4e are disconnected. In this case, the transmission line sensor 8 is used to measure the combined power generation output of the wind power generator 5b, the wind power generator 5c, the wind power generator 5d, the wind power generator 5e, and the wind power generator 5f. Therefore, the wind power generation device 5b, the wind power generation device 5c, the wind power generation device 5d, the wind power generation device 5e, and the wind power generation device 5f control their own power generation output to match the wind turbine output upper limit command value P _{WT_UL} *. In addition, the wind power generator 5a only needs to be controlled so that the power generation output of the power plant matches the upper limit output value P _{WF_UL} * of the power plant using the transmission line sensor 8.

Fig. 18 is a diagram showing the wiring (form 3) of the wind power plant 9a of this embodiment. As shown in FIG. 15, in the form 3, in the "open-close state of the switch", only "the opener 18a and the opener 18b" are the "open state", "the opener 18c and the opener 18d" and the "opener 18e""Is"closed". Therefore, as shown in FIG. 18, the connection transformer 3 and the transmission line 4a are disconnected. In this case, the transmission line sensor 8a is used to measure the combined power generation output of the wind power generator 5a, the wind power generator 5b, the wind power generator 5c, the wind power generator 5e, and the wind power generator 5f. Therefore, the wind power generation device 5a, the wind power generation device 5b, the wind power generation device 5c, the wind power generation device 5e, and the wind power generation device 5f control their own power generation output to match the wind turbine output upper limit command value P _{WT_UL} *. In addition, the wind power generation device 5d may be controlled so that the power generation output of the power plant matches the upper limit output value P _{WF_UL} * of the power plant using the transmission line sensor 8a.

Next, the operation of the entire wind power plant 9a will be described. FIG. 19 shows a flowchart of the operation of the entire wind power plant 9a shown in FIG. As shown in FIG. 19, in step S201, the power system control unit 6 sets the initial value of the power plant output upper limit command value P _{WF_UL} ^* . Here, as the initial value of the power plant output upper limit command value P _{WF_UL} ^* , the rated output (maximum output) of the wind power plant 9a is set. In step S202, it is determined whether the power plant controller 7a has received the power plant output upper limit command value P _{WF_UL} ^* from the power system control station 6 through the communication network 12. As a result of the determination, if the power plant output upper limit command value P _{WF_UL} ^* is not received, the process proceeds to step S204. On the other hand, as a result of the determination, when receiving the power plant output upper limit command value P _{WF_UL} ^* , the process proceeds to step S203. Furthermore, the period of receiving the power plant output upper limit command value P _{WF_UL} ^* from the power system control office 6 through the communication network 12, for example: setting 1 hour.

In step S203, for example, the power plant controller 7a updates the power plant output upper limit command value P _{WF_UL} ^* received at a 1-hour period, and proceeds to step S204. In step 204, the initial value of the opening and closing state of the switch is set. Here, the initial value of the opening and closing state of the switch is set to the opening and closing state when the power transmission line 4 is sound (the form 1 shown in FIG. 15).

In step 205, it is determined whether the power plant controller 7a uses the receiver of the power plant controller 7a via the wide area low-speed communication 10 via the switch 18a, switch 18b, switch 18c, switch 18d, and switch 18e 71a receives the open/close state. When it is received, the process proceeds to step S206. On the other hand, when it is not received, the process proceeds to step S207. Furthermore, the timing of receiving the opening and closing state of the switch, for example, when the transmission line 4a or the transmission line 4e is disconnected due to an accident. In step S206, the opened and closed states of the received switch 18a, switch 18b, switch 18c, switch 18d, and switch 18e are updated and stored in the control table memory device 74a.

In step S207, the wind turbine output upper limit determining unit 72a of the power plant controller 7a configured selects the form corresponding to the open/closed state from the open/closed state of the switch 18 and the table shown in FIG. 15. According to the output upper limit distribution ratio corresponding to the selected form and the power plant output upper limit command value P _{WF_UL} ^* , the individual wind turbine output upper limit command value P _{WT_UL} ^{* of} each wind power generator is obtained by the above equation (1). The individual windmill output upper limit command value P _{WT_UL} ^* obtained from the windmill output upper limit determining unit 72 a is transmitted to the corresponding wind power generator through the wide-area low-speed communication 10 via the transmitting unit 73. Here, the sending cycle of the windmill output upper limit command value P _{WT_UL} ^{* is} the same as the receiving cycle of the above power plant output upper limit command value P _{WF_UL} ^* , for example: setting 1 hour.

In step S208, it is determined whether the wind power generator at the transmission destination of the upper limit command value P _{WT_UL} ^* of the windmill is a wind power generator using the measured value of the power line sensor, and a wind power generator using the measured value of the power line sensor The situation is the same as that in the first embodiment described above, and proceeds to step S106 shown in FIG. 8. On the other hand, in the case of a wind power generator that does not use the measured value of the transmission line sensor, it is the same as the first embodiment described above, and proceeds to step S109 shown in FIG. 8. After that, the same processing as in steps S107 to S111 is executed in the same manner as in the above-described first embodiment.

According to the above, according to the present embodiment, in addition to the effects of the above-mentioned first embodiment, corresponding to the opening and closing state of the switch 18, the transmission line sensor to be used is selected, for example, the transmission line 4a or the transmission line 4e is disconnected due to an accident, It can also make the output of the power plant consistent with the upper limit. [Example 3]

Fig. 20 is a diagram showing the overall configuration of a wind power plant 9b according to Example 3 of another embodiment of the present invention. The wind power plant 9b of the present embodiment is different from the first embodiment in that the transmission line sensor 8 is added and the transmission line sensor 8b is added. The transmission line sensor 8b transmits the power flow measurement value P _LINE (b) (the power generation output of the wind power generator 5c) to the wind power generator 5b through the local high-speed communication 11b. In the following, the same components as those in the first embodiment are given the same symbols, and descriptions that are the same as those in the first embodiment are omitted.

Fig. 21 shows a schematic configuration of a power plant controller 7b provided in the wind power plant 9b shown in Fig. 20. As shown in FIG. 21, the configuration of the power plant controller 7b of this embodiment is different from the power plant controller 7 of the first embodiment described above, and the power generation output P _G (a ). The wind turbine output upper limit determining unit 72b is based on the power plant output upper limit command value P _{WF_UL} ^* , the power generation output P _G (a), and the table stored in the control table memory device 74b, which are instructed by the power system control unit 6 through the communication network 12, To determine the upper limit wind turbine output command value P _{WT_UL} ^{* of} each wind power generator 5. The windmill output upper limit command value P _{WT_UL} ^{* is} sent to each wind power generator 5 through the wide-area low-speed communication 10 through the transmission unit 73.

FIG. 22 shows an example of a table stored in the control table storage device 74b shown in FIG. 21. As shown in FIG. 22, the control table memory device 74b constituting the power plant controller 7b corresponds to the critical value of the power generation output P _G (a) of the wind power generator 5a, the windmill number, the presence or absence of transmission line sensors, and The output upper limit distribution ratio (%) is saved in the form of a table. The wind turbine output upper limit determining unit 72b constituting the power plant controller 7b is divided into two types (form 1, 2) of output upper limit distribution ratios corresponding to the power generation output P _G (a).

As shown in FIG. 22, in the form 1, "the critical value of the power generation output P _G (a) of the wind power generator 5a", for example, the case of "more than 10% of the rated output". In this case, as in the first embodiment described above, the wind power generator 5b and the wind power generator 5c control their own power generation output to match the wind turbine output upper limit command value P _{WT_UL} *. In addition, the wind power generator 5a uses the measurement value of the transmission line sensor 8 to control the power plant power generation output to match the power plant output upper limit command value P _{WF_UL} *. Form 2, "the critical value of the power generation output P _G (a) of the wind power generator 5a", for example: "the rated output has not reached 10%". In this case, since the output adjustment capability of the wind power generator 5a is small, the wind power generator 5a does not use the transmission line sensor 8 and controls its own power generation output to 0W. Furthermore, the wind power generator 5b uses the measured value of the transmission line sensor 8b to control the power plant power generation output to coincide with the power plant output upper limit command value P _{WF_UL} *. In addition, the wind power generator 5c performs the same operation as the first embodiment.

Next, the operation of the entire wind power plant 9b will be described, and FIG. 23 shows a flowchart of the operation of the entire wind power plant 9b shown in FIG. 20. As shown in FIG. 23, in step S301, the power system control unit 6 sets the initial value of the power plant output upper limit command value P _{WF_UL} ^* . Here, as the initial value of the power plant output upper limit command value P _{WF_UL} ^* , the rated output (maximum output) of the wind power plant 9b is set. In step S302, it is determined whether the power plant controller 7b has received the power plant output upper limit command value P _{WF_UL} ^* from the power system control station 6 through the communication network 12. As a result of the determination, if the power plant output upper limit command value P _{WF_UL} ^* is not received, the process proceeds to step S304. On the other hand, as a result of the determination, when receiving the power plant output upper limit command value P _{WF_UL} ^* , the process proceeds to step S303. Furthermore, the period of receiving the power plant output upper limit command value P _{WF_UL} ^* from the power system control office 6 through the communication network 12, for example: setting 1 hour.

In step 304, the power plant controller 7b sets the initial value of the power generation output _PG of the wind power generator. Here, for example, the rated output of the wind power generator 5a is set as the initial value. In step S305, it is determined whether the power plant controller 7b receives the power generation output measurement value P _{G of the} wind power generator 5a through the wide-area low-speed communication 10. When the measurement value _PG of the power generation output of the wind power generator 5a is not received, the process proceeds to step S307. On the other hand, when the measured value _PG of the power generation output of the wind power generator 5a is received, the process proceeds to step S306. Here, the reception cycle of the measured value P _G of the power generation output of the wind power generator 5 a is, for example, set for 10 minutes.

In step S306, the power generation output measurement value P _{G of the} wind power generator 5a is updated. In step S307, the wind turbine output upper limit determining unit 72b constituting the power plant controller 7b selects the corresponding power generation output measurement value P _G based on the received power generation output measurement value P _G of the wind power generator 5a and the table shown in FIG. 22 status. From the output upper limit distribution ratio corresponding to the selected form and the power plant output upper limit command value P _{WF_UL} ^* , the individual wind turbine output upper limit command value P _{WT_UL} ^{* of} each wind power generation device is obtained by the above formula (1). The individual windmill output upper limit command value P _{WT_UL} ^* obtained from the windmill output upper limit determining unit 72b is transmitted to the corresponding wind power generator 5a, wind power generator 5b, and wind power generator 5c through the wide-area low-speed communication 10 via the transmission unit 73 . The sending cycle of the windmill output upper limit command value P _{WT_UL} ^{* is} the same as the receiving cycle of the power plant output upper limit command value P _{WF_UL} ^* , for example: setting 1 hour.

In step S308, it is determined whether the wind power generator at the transmission destination of the wind turbine output upper limit command value P _{WT_UL} ^* is a wind power generator using the measured value of the power line sensor, and a wind power generator using the measured value of the power line sensor The situation is the same as in the first embodiment described above, and proceeds to step S106 shown in FIG. 8. On the other hand, in the case of a wind power generator that does not use the measured value of the transmission line sensor, it is the same as the first embodiment described above, and proceeds to step S109 shown in FIG. 8. After that, the same processing as in steps S107 to S111 is executed in the same manner as in the above-described first embodiment.

According to the above, according to this embodiment, in addition to the effects of the foregoing embodiment 1, it includes: a plurality of transmission line sensors 8 and transmission line sensors 8b, corresponding to the power generation output P _G (a) of the wind power generator 5a, which is selected for use Even if the wind speed (power generation output) of the wind power generator 5a decreases, the power transmission line sensor of the power generation unit can make the power generation output of the power plant coincide with the upper limit value. [Example 4]

Fig. 24 is a diagram showing the overall configuration of a wind power plant according to Example 4 of another embodiment of the present invention. The wind power plant 9c of this embodiment, instead of the power plant controller 7, includes the first power plant controller 19 and the second power plant controller 20, which are different from the above-described first and second embodiments. In the following, the same components as those in the first embodiment are given the same symbols, and descriptions that are the same as those in the first embodiment are omitted.

As shown in FIG. 24, the first power plant controller 19 communicates with more than half of the wind power plant 5b, the wind power plant 5c, the wind power plant 5e, and the wind power plant 5f in the wind power plant 9c through wide-area low-speed communication Communication 10a (for example: a 20-minute cycle) sends the windmill output upper limit command value P _{WT_UL} ^* to each wind power generator. The first power plant controller 19 determines the wind turbine output upper limit command value P _{WT_UL} ^{* that} limits the respective power generation outputs of the wind power generator 5 b, the wind power generator 5 c, the wind power generator 5 e, and the wind power generator _{5 f} . The second power plant controller 20 communicates with the local high-speed communication 11b (for example, a 1 second period) through a part of the wind power plant 5a and the wind power plant 5d in the wind power plant 9c and the transmission line sensors (8, 8a), Send the wind turbine output upper limit command value P _{WT_UL} ^* to each wind turbine generator. The second power plant controller 20 monitors the measured values of the transmission line sensors (8, 8a) such that the power plant output and the power plant output upper limit command value P _{WF_UL} ^* agree to determine the wind power plant 5a and wind power generation The windmill output upper limit command value P _{WT_UL} ^{* of the} device 5d.

According to the above, according to this embodiment, in addition to the effects of the above-mentioned embodiment 1, it includes: a plurality of power plant controllers and transmission line sensors, moreover, the other power plant controller is equipped with a part of the wind power generation device and The local high-speed communication of power line sensor communication can make the output of the power plant consistent with the upper limit.

Furthermore, the present invention is not limited to the above-mentioned Embodiment 1 to Embodiment 4, and includes various modifications. For example, the above-mentioned embodiment clearly explains the present invention, so the detailed description will be made, but it is not limited to having all the described structures. In addition, a part of the configuration of a certain embodiment may be replaced with the configuration of another embodiment, or a configuration of another embodiment may be added to the configuration of a certain embodiment. In addition, part of the configuration of each embodiment may be added, deleted, or replaced with another configuration.

In addition, each of the above-mentioned configurations, functions, processing units, processing means, etc., may be implemented in hardware by, for example, those designed using integrated circuits. In addition, for each of the above-mentioned configurations, functions, etc., the processor can interpret the program that realizes each function, or it can be implemented by software. Information such as programs, tables, and files that implement various functions can be stored in storage devices such as memory, hard disk, SSD (Solid-State-Drive), or recording media such as IC cards, SD cards, and DVDs.

1‧‧‧Power system 2‧‧‧Contact point 3‧‧‧ Connected transformer 4‧‧‧ transmission line 5‧‧‧Wind power plant 6‧‧‧ Power System Control Office 7‧‧‧ Power plant controller 8‧‧‧Power line sensor 9‧‧‧Wind power plant 10‧‧‧ Wide area low speed communication 11‧‧‧Local high-speed communication 12‧‧‧Communication network 13‧‧‧Possible power generation output 14‧‧‧Generation output 15‧‧‧Windmill output upper limit command value 16‧‧‧Insufficient part 17‧‧‧Power plant output upper limit command value 18‧‧‧Switch 51‧‧‧Anemometer 52‧‧‧Impeller 53‧‧‧Variable pitch mechanism 54‧‧‧Wind blades 55‧‧‧rotation axis 56‧‧‧Generator 57‧‧‧AC voltage sensor 58‧‧‧AC current sensor 59‧‧‧rotation speed detector 71‧‧‧Receiving Department 72‧‧‧Windmill output upper limit decision department 73‧‧‧ Communication Department 74‧‧‧Control form memory device 510‧‧‧Efficient Power Calculation Department 511‧‧‧Transformer 512‧‧‧DC voltage sensor 513‧‧‧Inverter 514‧‧‧AC current sensor 515‧‧‧AC voltage sensor 516‧‧‧ Step-up transformer 517‧‧‧Windmill Controller 5171‧‧‧Maximum power tracking controller 5172‧‧‧rotation speed controller 5173‧‧‧ Limiter

[Figure 1] An overall schematic configuration diagram of a wind power plant according to Embodiment 1 of an embodiment of the present invention. [Figure 2] A diagram showing a schematic configuration of a wind power generator 5b installed in the wind power plant shown in Figure 1. [FIG. 3] A diagram showing a schematic configuration of another wind power generator 5 a installed in the wind power plant shown in FIG. 1. [FIG. 4] A diagram showing a schematic configuration of a power plant controller installed in the wind power plant shown in FIG. 1. [Fig. 5] A diagram showing an example of a table stored in the control table storage device shown in Fig. 4. [FIG. 6] A diagram showing a schematic configuration of a windmill controller 517b that constitutes the wind turbine generator 5b shown in FIG. 2. [FIG. 7] A diagram showing a schematic configuration of a windmill controller 517a that constitutes the wind turbine generator 5a shown in FIG. 3. [Figure 8] A flowchart showing the operation of the entire wind power plant shown in Figure 1. [FIG. 9] It is a graph explaining the power generation output of the wind power generator of Example 1. [FIG. [Figure 10] A graph illustrating the combined power generation output of the wind power plant of Example 1. [FIG. 11] It is a graph explaining the power plant output upper limit command according to Modification 1 of Embodiment 1. [FIG. [Fig. 12] A table explaining a power plant output upper limit command according to Modification 1 of Embodiment 1. [Fig. [Fig. 13] A diagram showing the overall configuration of a wind power plant according to Example 2 of another embodiment of the present invention. [Fig. 14] A diagram showing a schematic configuration of a power plant controller provided in the wind power plant shown in Fig. 13. [Fig. 15] A diagram showing an example of a table stored in the control table storage device shown in Fig. 14. [Fig. 16] A diagram showing the wiring (form 1) of the wind power plant of the second embodiment. [Fig. 17] A diagram showing the wiring (form 2) of the wind power plant of the second embodiment. [Fig. 18] A diagram showing the connection (form 3) of the wind power plant of the second embodiment. [Fig. 19] A flowchart showing the operation of the entire wind power plant shown in Fig. 13. [Figure 20] A schematic diagram of the overall configuration of a wind power plant according to Example 3 of another embodiment of the present invention. [Fig. 21] A diagram showing a schematic configuration of a power plant controller provided in the wind power plant shown in Fig. 20. [Fig. [FIG. 22] A diagram showing an example of a table stored in the control table storage device shown in FIG. 21. [Figure 23] A flowchart showing the operation of the entire wind power plant shown in Figure 20. [Fig. 24] A diagram showing the overall configuration of a wind power plant according to Example 4 of another embodiment of the present invention.

1‧‧‧Power system

2‧‧‧Contact point

3‧‧‧ Connected transformer

4a, 4b, 4c‧‧‧ transmission line

5a, 5b, 5c ‧‧‧ wind power generator

6‧‧‧ Power System Control Office

7‧‧‧ Power plant controller

8‧‧‧Power line sensor

9‧‧‧Wind power plant

10‧‧‧ Wide area low speed communication

11‧‧‧Local high-speed communication

12‧‧‧Communication network

Claims (11)

A wind power plant, have: Multiple wind power generators that receive wind energy and generate electricity; A windmill controller that controls the power generation output of the aforementioned wind power generator; and A transmission line sensor that measures the combined power output of the wind power generator of a part of the aforementioned plurality of wind power generators; The first wind turbine controller that controls the first wind power generator determines the first wind power generator based on at least the measured value of the combined power generation output of the wind power generator measured by the power line sensor Power generation command value. The wind power plant as recited in claim 1, wherein, Equipped with a power plant controller, which receives the power plant output upper limit command value from the power system control station through the communication network, and sends the upper limit command value of each windmill output to the aforementioned plurality of wind power generation devices through wide-area low-speed communication; The aforementioned power plant controller has: The receiving department that receives the aforementioned upper limit output value of the power plant; and A wind turbine output upper limit determining section that determines the wind turbine output upper limit command value based on the upper limit value of the combined output of the plurality of wind power generators and a predetermined distribution ratio; The first windmill controller receives the measured value of the synthetic power output measured by the transmission line sensor through local high-speed communication, and determines the aforementioned value based on the measured value of the synthetic power output and the upper limit command value of the windmill output The power generation command value of the first wind power generator. The wind power plant as recited in claim 2, wherein, Equipped with a switch, which is to switch the connection and disconnection between the wind power generator or the wind power generator and the power system; The power plant controller has a control table memory device which stores a table corresponding to at least the opening and closing state of the switch, whether the transmission line sensor is used, and the distribution ratio; the wind turbine output upper limit determination unit is stored in the control according to The table of the table memory device determines the wind turbine output upper limit command value. The wind power plant as recited in claim 2, wherein, The power plant controller has a control table memory device that stores a table corresponding to at least the critical value of the power output of the first wind power generator, whether the power line sensor is used, and the distribution ratio; the wind turbine output upper limit is determined The unit determines the wind turbine output upper limit command value based on the table stored in the control table memory device. The wind power plant as recited in claim 4, wherein, The power plant controller receives the measurement value of the power generation output of the first wind power generator using the receiver, and the power generation output measurement value of the first wind power generator does not reach the critical value of the power generation output of the first wind power generator The wind turbine output upper limit determination unit determines the wind turbine output upper limit command value of the other wind power generator based on the measured value of the combined power generation output of the other wind power generator. The wind power plant as recited in claim 2, wherein, The aforementioned power plant controller includes a first power plant controller and a second power plant controller; The first power plant controller is connected to the wide-area low-speed communication through the wind power generator of the aforementioned part; The second power plant controller is connected to the local high-speed communication through at least the first wind power generator and the transmission line sensor. A control method for a wind power plant comprising: a plurality of wind power generators that receive wind energy and generate electricity; a windmill controller that controls the power generation output of the wind power generator; and a part of the plurality of wind power generators The transmission line sensor of the combined power generation output of the wind power generator; its characteristics are: The first wind turbine controller that controls the first wind power generator determines the first wind power generator based on at least the measured value of the combined power generation output of the wind power generator measured by the power line sensor Power generation command value. The control method of a wind power plant as described in claim 7, wherein, The aforementioned wind power plant is provided with a power plant controller, which receives the power plant output upper limit command value from the power system control station through a communication network, and transmits the upper limit output value of each windmill to the plurality of wind power generators through wide area low-speed communication ; The power plant controller determines the wind turbine output upper limit command value based on the upper limit value of the combined output of the plurality of wind power generators and a predetermined distribution ratio; The first windmill controller receives the measured value of the combined power generation output measured by the transmission line sensor through local high-speed communication, and determines the first 1 The power generation command value of the wind power generator. The control method of a wind power plant as recited in claim 8, wherein, The aforementioned wind power plant is equipped with a switch, which is to switch the connection and disconnection between the wind power generators or the wind power generators and the power system; The power plant controller stores a table corresponding to at least the opening and closing state of the switch, whether the transmission line sensor is used, and the distribution ratio, and determines the wind turbine output upper limit command value based on the stored table. The control method of a wind power plant as recited in claim 8, wherein, The power plant controller stores a table corresponding to at least the critical value of the power output of the first wind power generator, whether the power line sensor is used, and the distribution ratio, and determines the windmill output upper limit command according to the saved table value. The control method of a wind power plant as recited in claim 10, wherein, The power plant controller receives the measurement value of the power generation output of the first wind power generation device. When the measurement value of the power generation output of the first wind power generation device does not reach the critical value of the power generation output of the first wind power generation device, another wind power is used. The measured value of the combined power generation output of the power generating device is the aforementioned power plant output upper limit command value to determine the wind turbine output upper limit command value of the aforementioned other wind power generator device.

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