A wind farm primary frequency modulation device grid detection platform and an application method thereof

Abstract

The application discloses a wind farm primary frequency modulation device grid-connected detection platform and an application method thereof, and belongs to the technical field of wind power generation. The platform comprises a wind farm dynamic simulation system unit and a primary frequency modulation control system unit. The wind farm dynamic simulation system unit is composed of a wind farm digital simulation device, a power signal generating device, a frequency signal generating device, a display and a mouse keyboard. The primary frequency modulation control system unit is composed of a detected primary frequency modulation measurement and control device, a detected primary frequency modulation control device, a display and a mouse keyboard. The application is mainly used for carrying out the wind farm primary frequency modulation device grid-connected detection work. The wind farm dynamic simulation system can simulate the related characteristics of the wind farm power supply, an AGC system and an energy management system. Meanwhile, the wind farm dynamic simulation system can provide an analog interface and a data interface for the detected primary frequency modulation control device, so as to realize the laboratory closed-loop detection of the primary frequency modulation device function and performance.

Description

Technical Field

[0001] This invention relates to the field of power system technology, specifically to a grid connection testing platform for a primary frequency regulation device in a wind farm and its application method. Background Technology

[0002] With the increasing penetration rate of wind power, the lack of direct frequency coupling between wind turbines and the power grid makes it difficult for them to respond to frequency changes in the grid. This inevitably leads to a decrease in the inertia and primary frequency regulation capability of the entire power grid, thus affecting its safe and stable operation. To address this, the state has issued relevant standards requiring wind farms to possess primary frequency regulation capability and meet relevant performance requirements. However, actual field tests show that the primary frequency regulation performance of many wind farms does not meet the requirements. While the responsiveness of the wind turbines is one reason, another important factor is the functional and performance issues of the primary frequency regulation device itself. Therefore, establishing a testing platform that can effectively detect the performance of primary frequency regulation devices in wind farms has become a key concern for the power grid.

[0003] Currently, the method for grid connection testing of primary frequency regulation devices in wind farms generally adopts open-loop simulation verification to test the performance of the primary frequency regulation device item by item. However, this method ignores process control. For example, if the frequency exceeds the limit during AGC regulation, it is necessary to further verify whether the performance of the primary frequency regulation device can still meet the standard requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a grid connection testing platform for wind farm primary frequency regulation devices and its application method, which addresses the above-mentioned problems of the prior art. The present invention can simulate the active power output characteristics of the wind farm grid connection point, as well as the control characteristics of the AGC system and the EMS energy management system, thereby realizing the laboratory closed-loop testing of the function and performance of the primary frequency regulation device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A grid connection testing platform for a wind farm primary frequency regulation device includes a wind farm dynamic simulation system unit and a primary frequency regulation control system unit, wherein the wind farm dynamic simulation system unit includes:

[0007] A wind farm digital simulation device is used to generate active power control commands and primary frequency regulation control input frequency signals according to instructions.

[0008] A power signal generator is used to issue active power control commands.

[0009] A frequency signal generator is used to send out a primary frequency modulation control input frequency signal.

[0010] The first human-computer interaction module is used to display and operate the data and instructions from the host computer of the detection platform;

[0011] The wind farm digital simulation device is connected to the power signal generator, the frequency signal generator and the first human-machine interaction module, respectively.

[0012] The primary frequency modulation control system unit includes:

[0013] The primary frequency control device under test is used to realize data interaction with the primary frequency control measurement and control device under test and the wind farm digital simulation device, respectively.

[0014] The primary frequency modulation measurement and control device under inspection is used to monitor the power and frequency analog data output by the power signal generator and the frequency signal generator;

[0015] The primary frequency modulation control device under test, the primary frequency modulation measurement and control device under test, and the wind farm digital simulation device are interconnected, and the primary frequency modulation measurement and control device under test is connected to the output terminals of the power signal generator and the frequency signal generator, respectively.

[0016] Optionally, the wind farm dynamic simulation system unit is housed in a separate cabinet.

[0017] Optionally, the primary frequency modulation control system unit is located in a separate cabinet.

[0018] Optionally, the first human-computer interaction module includes a display, a keyboard, and a mouse, which are respectively connected to the wind farm digital simulation device.

[0019] Optionally, the primary frequency modulation control system unit further includes a second human-machine interaction module for displaying data and instructions from the host computer of the primary frequency modulation system, and the second human-machine interaction module is connected to the primary frequency modulation control device under test.

[0020] Optionally, the second human-computer interaction module includes a display, a keyboard, and a mouse, which are respectively connected to the primary frequency modulation control device under test.

[0021] Furthermore, the present invention also provides an application method for the aforementioned wind farm primary frequency regulation device grid access testing platform, comprising:

[0022] S101 simulates the control characteristics of the wind farm AGC system and EMS through the wind farm digital simulation device, and controls the power signal generator to issue active power control commands to simulate the active power output characteristics of the wind farm grid connection point, controls the frequency signal generator to issue primary frequency modulation control input frequency signals, and sends a primary frequency modulation enable action signal to the primary frequency modulation measurement and control device under test through the primary frequency modulation control device under test.

[0023] S102, after the primary frequency modulation enable signal, the primary frequency modulation measurement and control device under test performs primary frequency modulation measurement and control operation according to the issued active power control command and primary frequency modulation control input frequency signal, and sends the obtained power and frequency analog data to the primary frequency modulation control device under test.

[0024] S103, the wind farm digital simulation device collects and executes primary frequency regulation measurement and control operations through the tested primary frequency regulation control device, and obtains analog power and frequency data. The collected analog power and frequency data are compared with the calibration values ​​to determine whether the performance of the tested primary frequency regulation measurement and control device is qualified.

[0025] Optionally, the execution time of the control power signal generator issuing the active power control command to simulate the active power output characteristics of the wind farm grid connection point in step S101 is before the operation of sending the primary frequency modulation enable action signal to the primary frequency modulation measurement and control device under test through the primary frequency modulation control device under test.

[0026] Optionally, the wind farm digital simulation device and the tested primary frequency control device are distinguished by register addresses and function codes stored in different register addresses. The interaction signals have read-only and read / write attributes to realize read-only and read / write operations for information interaction.

[0027] Optionally, the different interactive signals include: active power control commands issued by the AGC substation to the Energy Management System (EMS), the theoretical active power of the power station, the lower limit of the active power of the power station, the total active power of all power generation units, the control mode of the Energy Management System (EMS), the primary frequency regulation enable signal under test, the active power control commands issued by the primary frequency regulation control device under test to the Energy Management System (EMS), the AGC activation signal, the dispatch AGC command, and the primary frequency regulation control input frequency under test.

[0028] Compared with the prior art, the present invention has the following main advantages:

[0029] 1. The wind farm primary frequency regulation device grid connection test platform of the present invention incorporates a power signal generator, which can receive the active power control command of the primary frequency regulation control device under test, and simulate and output the voltage and current secondary signals corresponding to the wind farm grid connection point, thereby achieving the purpose of dynamic closed-loop simulation test of the performance of the primary frequency regulation control device under test.

[0030] 2. The grid connection testing platform for wind farm primary frequency regulation devices of the present invention incorporates factors affecting the performance of primary frequency regulation control, such as wind farm AGC system and energy management system. It can provide more realistic and comprehensive test scenarios under various operating conditions of actual wind farms, laying a good test foundation for verifying the performance of the tested primary frequency regulation control device under various operating conditions, as well as its coordinated control function with AGC system and energy management system. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the device structure according to an embodiment of the present invention.

[0032] Legend: 1. Wind farm dynamic simulation system unit; 11. Wind farm digital simulation device; 12. Power signal generator; 13. Frequency signal generator; 14. First human-machine interaction module; 2. Primary frequency modulation control system unit; 21. Primary frequency modulation control device under test; 22. Primary frequency modulation measurement and control device under test; 23. Second human-machine interaction module. Detailed Implementation

[0033] like Figure 1 As shown, the grid connection detection platform for a wind farm primary frequency regulation device in this embodiment includes a wind farm dynamic simulation system unit 1 and a primary frequency regulation control system unit 2. The wind farm dynamic simulation system unit 1 includes:

[0034] The wind farm digital simulation device 11 is used to generate active power control commands and primary frequency regulation control input frequency signals according to instructions;

[0035] The power signal generator 12 is used to issue active power control commands;

[0036] Frequency signal generator 13 is used to send a primary frequency modulation control input frequency signal;

[0037] The first human-computer interaction module 14 is used to display and operate the data and instructions of the detection platform's host computer;

[0038] The wind farm digital simulation device 11 is connected to the power signal generator 12, the frequency signal generator 13 and the first human-machine interaction module 14, respectively.

[0039] The primary frequency modulation control system unit 2 includes:

[0040] The primary frequency control device 21 under test is used to realize data interaction with the primary frequency control device 22 under test and the wind farm digital simulation device 11 respectively.

[0041] The primary frequency modulation measurement and control device 22 under test is used to monitor the power and frequency analog data output by the power signal generator 12 and the frequency signal generator 13;

[0042] The primary frequency control device 21 under test, the primary frequency measurement and control device 22 under test, and the wind farm digital simulation device 11 are interconnected, and the primary frequency measurement and control device 22 under test is connected to the output terminals of the power signal generator 12 and the frequency signal generator 13, respectively.

[0043] In this embodiment, the wind farm dynamic simulation system unit 1 is located in a separate cabinet.

[0044] In this embodiment, the primary frequency modulation control system unit 2 is located in a separate cabinet.

[0045] In this embodiment, the first human-computer interaction module 14 includes a display, a keyboard, and a mouse, which are connected to the wind farm digital simulation device 11.

[0046] In this embodiment, the primary frequency modulation control system unit 2 further includes a second human-machine interaction module 23 for displaying the primary frequency modulation system host computer data and instructions. The second human-machine interaction module 23 is connected to the primary frequency modulation control device 21 under test.

[0047] In this embodiment, the second human-computer interaction module 23 includes a display, a keyboard, and a mouse, which are respectively connected to the primary frequency modulation control device 21 under test.

[0048] In this embodiment, the wind farm digital simulation device 11 and the primary frequency regulation control device under test 21 are specifically implemented using a computer. Alternatively, embedded terminal equipment can be used as needed. The power signal generator 12 and the frequency signal generator 13 are existing equipment. The primary frequency regulation measurement and control device under test 22 is the device under test, and its detailed implementation will not be described here.

[0049] Furthermore, this embodiment also provides an application method for the aforementioned wind farm primary frequency regulation device grid access testing platform, including:

[0050] S101, the wind farm digital simulation device 11 simulates the control characteristics of the wind farm AGC system and the energy management system EMS, and controls the power signal generator 12 to issue active power control commands to simulate the active power output characteristics of the wind farm grid connection point, controls the frequency signal generator 13 to issue primary frequency modulation control input frequency signals, and sends a primary frequency modulation enable action signal to the primary frequency modulation measurement and control device 22 under test through the primary frequency modulation control device 21.

[0051] S102, after the primary frequency modulation enable signal, the primary frequency modulation measurement and control device 22 under test performs primary frequency modulation measurement and control operation according to the issued active power control command and primary frequency modulation control input frequency signal, and sends the obtained power and frequency analog data to the primary frequency modulation control device 21 under test.

[0052] S103, the wind farm digital simulation device 11 collects and executes primary frequency regulation measurement and control operations through the tested primary frequency regulation control device 21, and obtains analog power and frequency data. The collected analog power and frequency data are then compared with calibration values ​​to determine whether the performance of the tested primary frequency regulation measurement and control device 22 is qualified. Specifically, if the error between a certain power and frequency analog data and the set value exceeds the set value, the performance of the tested primary frequency regulation measurement and control device 22 is deemed unqualified; if the errors between all power and frequency analog data and the set values ​​do not exceed the set values, the performance of the tested primary frequency regulation measurement and control device 22 is deemed qualified.

[0053] The control power signal generator 12 issues an active power control command to simulate the active power output characteristics of the wind farm grid connection point, and the control frequency signal generator 13 issues a primary frequency regulation control input frequency signal. The primary frequency regulation control device 21 sends a primary frequency regulation enable action signal to the primary frequency regulation measurement and control device 22 under test. These actions should be performed separately. In this embodiment, before the operation of the control power signal generator 12 issuing an active power control command to the energy management system (EMS) and sending a primary frequency regulation enable action signal to the primary frequency regulation measurement and control device 22 under test through the primary frequency regulation control device 21 in step S101.

[0054] In this embodiment, the wind farm digital simulation device 11 and the primary frequency regulation control device under test 21 exchange information through registers. The registers distinguish different interaction signals between the wind farm digital simulation device 11 and the primary frequency regulation control device 21 by register addresses and function codes stored in different register addresses. The interaction signals have read-only and read / write attributes to realize read-only and read / write operations for information interaction. As an optional implementation, in this embodiment, the primary frequency regulation control device 21 under test is the master station and the wind farm digital simulation device 11 is the slave station, so that the primary frequency regulation control device 21 under test can read and write information in the wind farm digital simulation device 11.

[0055] In this embodiment, the different interactive signals include: active power control commands issued by the AGC substation to the Energy Management System (EMS), the theoretical active power of the power plant, the lower limit of the active power of the power plant, the total active power of all power generation units, the control mode of the Energy Management System (EMS), the primary frequency regulation enable signal under test, the active power control commands issued by the primary frequency regulation control device 21 under test to the Energy Management System (EMS), the AGC activation signal, the dispatch AGC command, and the primary frequency regulation control input frequency under test. Table 1 shows the information interaction points between the wind farm digital simulation device and the primary frequency regulation control device under test.

[0056] Table 1: Information Interaction Points Between the Wind Farm Digital Simulation Device and the Tested Primary Frequency Regulation Control Device

[0057]

[0058]

[0059] The primary frequency regulation device grid access testing platform of this embodiment provides a closed-loop dynamic simulation test environment for the primary frequency regulation device. Step S101 simulates the control characteristics of the wind farm AGC system and EMS through the wind farm digital simulation device 11, including: the TV ratio of the simulated grid connection point of the test platform is 1100:1, the TA ratio is 600:1, the secondary current rating is 1A, the communication protocol with the primary frequency regulation control device under test adopts the standard Modbus TCP protocol, the communication port is port 503, the IP address is 192.168.2.15, and the byte order of the floating point number is C, D, A, B.

[0060] In summary, the wind farm primary frequency regulation device grid connection testing platform of this embodiment includes a wind farm dynamic simulation system unit and a primary frequency regulation control system unit. The wind farm dynamic simulation system unit consists of a wind farm digital simulation device, a power signal generator, a frequency signal generator, a display, and a mouse and keyboard. The primary frequency regulation control system unit consists of the primary frequency regulation measurement and control device under test, the primary frequency regulation control device under test, a display, and a mouse and keyboard. This wind farm primary frequency regulation device grid connection testing platform is mainly used to conduct grid connection testing of wind farm primary frequency regulation devices. The wind farm dynamic simulation system can simulate the relevant characteristics of wind farm power supply, AGC system, and energy management system. Simultaneously, it can provide simulation and data interfaces for the primary frequency regulation control device under test, thereby realizing closed-loop laboratory testing of the primary frequency regulation device's functions and performance.

[0061] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An application method for a grid connection testing platform for a primary frequency regulation device in a wind farm, characterized in that, The wind farm primary frequency regulation device grid access detection platform includes a wind farm dynamic simulation system unit (1) and a primary frequency regulation control system unit (2). The wind farm dynamic simulation system unit (1) includes: a wind farm digital simulation device (11) for generating active power control commands and primary frequency regulation control input frequency signals according to instructions; a power signal generator (12) for issuing active power control commands; a frequency signal generator (13) for issuing primary frequency regulation control input frequency signals; and a first human-machine interaction module (14) for displaying and operating the detection platform's host computer data and commands. The wind farm digital simulation device (11) is connected to the power signal generator (12), the frequency signal generator (13), and the first human-machine interaction module (14) respectively. The primary frequency control system unit (2) is connected to the module (14); the primary frequency control system unit (2) includes: a primary frequency control device (21) under test, used to realize data interaction with the primary frequency control device (22) under test and the wind farm digital simulation device (11); the primary frequency control device (22) under test is used to monitor the power and frequency analog data output by the power signal generator (12) and the frequency signal generator (13); the primary frequency control device (21) under test, the primary frequency control device (22) under test and the wind farm digital simulation device (11) are interconnected, and the primary frequency control device (22) under test is connected to the output terminals of the power signal generator (12) and the frequency signal generator (13) respectively; The application method includes: S101, simulating the control characteristics of the wind farm AGC system and the energy management system EMS through the wind farm digital simulation device (11), and controlling the power signal generator (12) to issue active power control commands to simulate the active power output characteristics of the wind farm grid connection point, controlling the frequency signal generator (13) to issue the primary frequency modulation control input frequency signal, and sending the primary frequency modulation enable action signal to the primary frequency modulation measurement and control device (22) under test through the primary frequency modulation control device (21); S102, after the primary frequency modulation enable action signal, the primary frequency modulation measurement and control device (22) under test performs the primary frequency modulation measurement and control operation according to the issued active power control command and the primary frequency modulation control input frequency signal, and sends the obtained power and frequency analog data to the primary frequency modulation control device under test. 21); S103, the wind farm digital simulation device (11) collects and executes the primary frequency regulation measurement and control operation through the primary frequency regulation control device (21) under test and obtains the power and frequency analog data, and compares the collected power and frequency analog data with the calibration value to determine whether the performance of the primary frequency regulation measurement and control device (22) under test is qualified; the wind farm digital simulation device (11) and the primary frequency regulation control device (21) under test interact with each other through registers. The registers distinguish different interaction signals between the wind farm digital simulation device (11) and the primary frequency regulation control device (21) under test through register addresses and function codes stored in different register addresses. The interaction signals have read-only and read / write attributes to realize read-only and read / write operations for information interaction.

2. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, The wind farm dynamic simulation system unit (1) is located in an independent cabinet.

3. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, The primary frequency modulation control system unit (2) is located in a separate cabinet.

4. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, The first human-computer interaction module (14) includes a display, a keyboard and a mouse, which are connected to the wind farm digital simulation device (11).

5. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, The primary frequency modulation control system unit (2) further includes a second human-machine interaction module (23) for displaying primary frequency modulation system host computer data and instructions. The second human-machine interaction module (23) is connected to the primary frequency modulation control device (21) under test.

6. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 5, characterized in that, The second human-computer interaction module (23) includes a display, a keyboard and a mouse, which are respectively connected to the primary frequency modulation control device (21) under test.

7. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, In step S101, the execution time of the control power signal generating device (12) issuing the active power control command to simulate the active power output characteristics of the wind farm grid connection point is before the operation of the primary frequency regulation control device (21) sending the primary frequency regulation enable action signal to the primary frequency regulation measurement and control device (22) under test.

8. The application method of the grid connection testing platform for wind farm primary frequency regulation devices according to claim 1, characterized in that, The different interactive signals include: active power control commands issued by the AGC substation to the Energy Management System (EMS), the theoretical active power of the power station, the lower limit of the active power of the power station, the total active power of all power generation units, the control mode of the Energy Management System (EMS), the primary frequency regulation enable action signal under test, the active power control commands issued by the primary frequency regulation control device under test to the Energy Management System (EMS), the AGC activation signal, the dispatch AGC command, and the primary frequency regulation control input frequency under test.

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