CN108107287A - Based on closed loop response dynamic reactive generating means device for detecting performance and detection method - Google Patents

Abstract

The invention discloses a performance detection device and a detection method of a dynamic reactive power generator based on a closed-loop response, which solves the problem that various test performances cannot be truly and objectively completed when the dynamic reactive power generator is detected in the prior art. The present invention replaces the uncontrollable disturbance of the switching of the collector line of the measured field and station by the controllable disturbance set by the industrial computer under the real simulation of the power grid operation state of the measured field station, and achieves the best response characteristics of the dynamic reactive power generating device. The real waveform acquisition realizes the objective evaluation of the performance of the dynamic var generator; in particular, it realizes the test of the response characteristics of the dynamic var generator under the extreme state of low voltage and high voltage.

Description

Performance detection device and detection method of dynamic reactive power generator based on closed-loop response

technical field

The invention relates to a performance detection device and detection method of a dynamic reactive power generator based on a secondary disturbance closed-loop response, which is suitable for performance detection of dynamic reactive power generators with different capacities, voltage levels and principles.

Background technique

New energy sources such as wind power and photovoltaic power generation have the characteristics of intermittent and volatility. After they are connected to the traditional power grid in a large scale and in a concentrated manner, they have caused an impact on the power grid. The fluctuation of new energy grid-connected power will inevitably cause frequent fluctuations in the voltage of the grid-connected point. Especially when the power grid fails, both wind turbines and photovoltaic grid-connected inverters have high and low voltage ride-through processes. Due to the limitation of their reactive power adjustment capabilities, large-scale off-grid accidents of new energy power plants will occur, which seriously affects the surrounding electrification. Power quality of important power loads such as railways, satellite launch centers, and large public service industries. In order to improve the safety and stability of power grids containing large-capacity wind power and photovoltaic power systems, dynamic reactive power generators are equipped in such power grids to achieve the purpose of improving the power quality of their power grids. The configuration of dynamic reactive power generators for different new energy stations is configured according to the power grid structure and load conditions of the station. Dynamic reactive power generators generally have two working modes: constant voltage output mode and constant reactive power output mode. The dynamic reactive power generator usually performs reactive power compensation to the power grid in the constant voltage output mode. In this mode, the response time of the dynamic reactive power generator is the main index reflecting the performance of the dynamic reactive power generator. The calculation of the response time The starting point is when the power grid disturbance occurs, and the end point is when the reactive power output value of the dynamic reactive power generator reaches 90% of its stable output. The constant reactive power output mode of the dynamic reactive power generator is generally used for testing or in the debugging stage when the dynamic reactive power generator is connected to the grid.

Relevant standards put forward clear requirements for the response time and high and low voltage ride-through capabilities of dynamic reactive power generators in new energy stations. This requires real and objective testing and evaluation of the dynamic performance of the dynamic var generator on site to evaluate the performance of the dynamic var generator. At present, there are three main methods for testing the performance of dynamic var generators: (1) Step command adjustment detection method, which is to issue reactive step commands to the dynamic var generator, and then detect the change of reactive power from the original value This test method has the defect that it cannot truly detect the whole process response time of the dynamic var generator when the voltage disturbance occurs. (2) Secondary circuit disturbance simulation detection method, which is to input the analog voltage fluctuation amount on the secondary side of the dynamic reactive power generator, and measure the response of the primary side to determine the response process. This kind of test technology cannot form a closed-loop response, which is quite different from the actual response process, and the test results are not true. (3) One-time disturbance simulation detection method, generally select the collector line with the largest capacity connected to the bus, and switch it to create a bus voltage disturbance, and the rest of the collector lines on the bus are still running normally, taking this disturbance as a reference value , to test the response time of the dynamic var generator. This detection method is relatively scientific, but there are still the following three problems: First, because the capacity of each collector line connected to the busbar of the station is different, the depth of the busbar voltage drop caused by switching is uncontrollable, which affects the dynamic reactive power. The performance evaluation of the generating device is not objective; the second is that the busbar voltage drop depth produced by the existing switching collector line is limited, and the busbar voltage drop depth cannot meet the required drop depth index (the general wind farm requirement is 0.2 times rated voltage; the photovoltaic power station is a low voltage that requires 0 voltage); the third is that the way of switching the collector line cannot generate high voltage disturbances, resulting in the inability to complete the performance test of the dynamic reactive power generating device under the high voltage limit voltage.

Contents of the invention

The invention provides a performance detection device and detection method of a dynamic reactive power generator based on a closed-loop response, which solves the problem that various test performances cannot be truly and objectively completed when the dynamic reactive power generator is detected in the prior art.

The present invention solves the above technical problems through the following technical solutions:

A performance detection device for a dynamic reactive power generator based on a secondary disturbance closed-loop response, including a high-voltage side bus, a low-voltage side bus and an industrial computer, and a dynamic reactive power generator and a low-voltage side voltage transformer are respectively connected to the low-voltage side bus. The high-voltage side voltage transformer is connected to the high-voltage side busbar, and the output voltage terminal of the dynamic reactive power generation device of the secondary control cabinet of the dynamic reactive power generation device is connected with the industrial computer through the first analog-to-digital converter. The output current terminal of the dynamic reactive power generator of the secondary control cabinet of the power generator is connected with the industrial computer through the second analog-to-digital converter, and the output terminal of the industrial computer is connected with the secondary control cabinet of the dynamic reactive power generator. The input voltage terminals of the dynamic var generating device are connected together.

The industrial computer is connected together with the secondary voltage test terminal of the voltage transformer on the high voltage side, and the industrial computer is connected with the secondary voltage test terminal of the voltage transformer on the low voltage side.

A method for detecting the performance of a dynamic reactive power generator based on a secondary disturbance closed-loop response, characterized in that it comprises the following steps:

First of all, determine the average value k of the change value k of the busbar voltage of the power grid busbar under test that can be caused by the unit reactive power compensation of the dynamic reactive power generating device. The specific determination method is: connect the The dynamic reactive power generating device is set in the constant reactive power output mode, and the reactive output value of the dynamic reactive power generating device is continuously adjusted through manual setting. The adjustment range is: the rated reactive power output capacity of the negative dynamic reactive power generating device to The rated reactive output capacity of the dynamic reactive power generating device, the change amount of each setting is 10% of the rated reactive output capacity, and the voltage of the high-voltage side bus is read through the secondary voltage test terminal of the high-voltage side voltage transformer Divide the read voltage change value of each high-voltage side bus by 10% of the rated reactive power output capacity (0.1Q _N ), and calculate the unit reactive power compensation capacity of a group of dynamic reactive power generators. The variation value of the grid bus voltage of the measured site and station caused by it is averaged to obtain the average value k of the variation value of the grid bus voltage of the measured site that can be caused by the unit reactive power compensation amount;

Secondly, connect the output end of the industrial computer with the input voltage end of the dynamic var generator of the secondary control cabinet of the dynamic var generator, set the reactive output of the dynamic var generator to the minimum reactive state, and set The value of the output terminal of the industrial computer is the rated voltage value of the high-voltage side busbar of the station under test. Then, connect the input voltage terminal of the dynamic reactive power generator of the secondary control cabinet of the dynamic reactive power generator to the high-voltage side of the station under test. The connection end of the secondary test of the high-voltage side voltage transformer on the bus is disconnected, and the output terminal of the industrial computer is used to replace the voltage of the high-voltage side bus of the station under test to test the response characteristics of the dynamic reactive power generator;

Next, set the dynamic reactive power generator in the constant voltage output mode;

Finally, test the various response characteristics of the dynamic var generating device respectively, the steps are as follows: The first step is to test the response characteristics of the dynamic var generating device under general voltage fluctuation: subtract the rated voltage value of the high-voltage side bus from The dead zone voltage value of the dynamic reactive power generating device has obtained the difference, and the voltage value of the output terminal of the industrial computer is set to 0.95 times the difference, and the output voltage of the dynamic reactive power generating device on the secondary control cabinet of the dynamic reactive power generating device is collected The voltage value on the terminal and the current value on the output current terminal of the dynamic reactive power generating device on the secondary control cabinet of the dynamic reactive power generating device, and the output reactive power _Q1 of the dynamic reactive power generating device is continuously calculated by using the instantaneous reactive power theory , the product of the calculated output reactive power Q ₁ and the average value k of the grid bus voltage change value plus the rated voltage value of the high-voltage side bus is equal to the voltage value on the output terminal of the industrial computer , which can be simulated and measured, when the disturbance of 0.95 times of its rated voltage value appears on the high-voltage side bus, the response characteristics of the dynamic var generator; 0.85 times, 0.8 times, 0.75 times and 0.7 times of the difference are obtained by subtracting the dead zone voltage value of the dynamic var generator from the rated voltage value, and the rated voltage value of the high voltage side bus plus the dead zone voltage of the dynamic var generator The value obtained is 1.05 times and 1.1 times of the value, and the response characteristics of the dynamic var generator can be simulated and measured when the corresponding voltage disturbance occurs on the high-voltage side bus;

The second step is to test the response characteristics of the dynamic var generator under the low voltage ride-through of the wind farm: set the voltage value of the output terminal of the industrial computer to 0.2 times the rated voltage of the high-voltage side bus, and collect the dynamic var generator The voltage value on the output voltage terminal of the dynamic reactive power generator on the secondary control cabinet and the current value on the output current terminal of the dynamic reactive power generator on the secondary control cabinet of the dynamic reactive power generator are continuously calculated by using the instantaneous reactive power theory The output reactive power Q ₁ of the dynamic reactive power generating device, the product of the output reactive power Q ₁ of the dynamic reactive power generating device and the average value k of the change value of the grid bus voltage is added to the rated voltage value of the high-voltage side bus It is equal to the voltage value on the output terminal of the industrial computer; it can be simulated and measured, and the response characteristic test of the dynamic reactive power generation device under the low voltage ride-through of the wind farm;

The third step is to test the response characteristics of the dynamic reactive power generator under the low voltage ride-through of the photovoltaic power station: set the voltage value of the output terminal of the industrial computer to 0, and collect the dynamic reactive power on the secondary control cabinet of the dynamic reactive power generator The voltage value on the output voltage terminal of the generator and the current value on the output current terminal of the dynamic reactive power generator on the secondary control cabinet of the dynamic reactive power generator are used to continuously calculate the output reactive power of the dynamic reactive power generator by using the instantaneous reactive power theory. Work power Q ₁ , the product of the output reactive power Q ₁ of the dynamic reactive power generating device and the average value k of the grid bus voltage change and the rated voltage value of the high-voltage side bus are equal to the output of the industrial computer. Voltage value; it can be simulated and measured, and the response characteristic test of the dynamic reactive power generating device under the low voltage ride-through of the photovoltaic power station;

Step 4: Test the response characteristics of the dynamic var generator under high voltage ride-through: set the voltage value of the output terminal of the industrial computer to 1.3 times the rated voltage of the high-voltage side bus, and collect the secondary control of the dynamic var generator The voltage value on the output voltage terminal of the dynamic reactive power generator on the cabinet and the current value on the output current terminal of the dynamic reactive power generator on the secondary control cabinet of the dynamic reactive power generator are continuously calculated by using the instantaneous reactive power theory. The output reactive power Q ₁ of the generating device, the product of the output reactive power Q ₁ of the dynamic reactive power generating device and the average value k of the change value of the grid bus voltage and the rated voltage value of the high-voltage side bus are equal to the industrial computer The voltage value on the output terminal of the device can be simulated to measure the response characteristics of the dynamic reactive power generating device under high voltage ride through.

The present invention replaces the uncontrollable disturbance of the switching of the collector line of the measured field and station by the controllable disturbance set by the industrial computer under the real simulation of the power grid operation state of the measured field station, and achieves the best response characteristics of the dynamic reactive power generating device. The real waveform acquisition realizes the objective evaluation of the performance of the dynamic var generator; in particular, it realizes the test of the response characteristics of the dynamic var generator under the extreme state of low voltage and high voltage.

Description of drawings

Fig. 1 is a schematic diagram of wiring of a performance detection device of a dynamic reactive power generator based on a secondary disturbance closed-loop response of the present invention.

Detailed ways

The present invention is described in detail below according to accompanying drawing:

A performance detection device for a dynamic reactive power generator based on a secondary disturbance closed-loop response, including a high-voltage side bus 1, a low-voltage side bus 2, and an industrial computer 6, and a dynamic reactive power generator 5 and a low-voltage side bus 2 are connected to the low-voltage side bus 2, respectively. The side voltage transformer 4 is connected with the high voltage side voltage transformer 3 on the high voltage side bus bar 1, and the output voltage terminal V _{out of} the dynamic reactive power generating device of the secondary control cabinet 7 of the dynamic reactive power generating device 5 is passed through the first modulus The converter 8 is connected with the industrial computer 6, and the dynamic reactive power generator output current terminal _Iout of the secondary control cabinet 7 of the dynamic reactive power generator 5 is connected with the industrial computer 6 through the second analog-to-digital converter 9. Together, the output terminal _V1 of the industrial computer 6 is connected with the input voltage terminal V _in of the dynamic reactive power generator of the secondary control cabinet 7 of the dynamic reactive power generator 5 .

The industrial computer 6 is connected with the secondary voltage test terminal of the voltage transformer 3 at the high voltage side, and the industrial computer 6 is connected with the secondary voltage test terminal of the voltage transformer 4 at the low voltage side.

A method for detecting the performance of a dynamic reactive power generator based on a secondary disturbance closed-loop response, characterized in that it comprises the following steps:

First of all, determine the average value k of the change value k of the busbar voltage of the power grid busbar under test that can be caused by the unit reactive power compensation of the dynamic reactive power generating device 5. The specific determination method is: connect the low-voltage side busbar The dynamic reactive power generating device 5 on 2 is set in the constant reactive power output mode. Through manual setting, the reactive power output value of the dynamic reactive power generating device 5 is continuously adjusted. The adjustment range is: the rated value of the negative dynamic reactive power generating device 5 Reactive power output capacity-Q _N to the rated reactive power output capacity Q _N of the dynamic reactive power generating device 5, the change amount of each setting is 10% of the rated reactive power output capacity, and through the secondary of the high-voltage side voltage transformer 3 Measure the voltage test terminal, read the change value of the voltage of bus 1 on the high-voltage side, and record the results as follows:

When the reactive power output is -Q _N , record the voltage value of the high voltage side as V _H1 ;

When the reactive power output is -0.9Q _N , record the voltage value of the high voltage side as V _H2 ;

When the reactive power output is -0.8Q _N , record the voltage value of the high voltage side as V _H3 ;

When the reactive power output is -0.7Q _N , record the voltage value of the high voltage side as V _H4 ;

When the reactive power output is -0.6Q _N , record the voltage value of the high voltage side as V _H5 ;

When the reactive power output is -0.5Q _N , record the voltage value of the high voltage side as V _H6 ;

When the reactive power output is -0.4Q _N , record the voltage value of the high voltage side as V _H7 ;

When the reactive power output is -0.3Q _N , record the voltage value of the high voltage side as V _H8 ;

When the reactive power output is -0.2Q _N , record the voltage value of the high voltage side as V _H9 ;

When the reactive power output is -0.1Q _N , record the voltage value of the high voltage side as V _H10 ;

When the reactive power output is 0, record the voltage value of the high voltage side as V _H11 ;

When the reactive power output is 0.1Q _N , record the voltage value of the high voltage side as V _H12 ;

When the reactive power output is 0.2Q _N , record the voltage value of the high voltage side as V _H13 ;

When the reactive power output is 0.3Q _N , record the voltage value of the high voltage side as V _H14 ;

When the reactive power output is 0.4Q _N , record the voltage value of the high voltage side as V _H15 ;

When the reactive power output is 0.5Q _N , record the voltage value of the high voltage side as V _H16 ;

When the reactive power output is 0.6Q _N , record the voltage value of the high voltage side as V _H17 ;

When the reactive power output is 0.7Q _N , record the voltage value of the high voltage side as V _H18 ;

When the reactive power output is 0.8Q _N , record the voltage value of the high voltage side as V _H19 ;

When the reactive power output is 0.9Q _N , record the voltage value of the high voltage side as V _H20 ;

When the reactive power output is Q _N , record the voltage value of the high voltage side as V _H21 ;

Divide the read voltage change value of each high-voltage side bus 1 by 10% of the rated reactive power output capacity, that is, 0.1Q _N , to calculate the The change value of the grid bus voltage of the measured station is averaged to obtain the average value k of the change value of the grid bus voltage of the measured station that can be caused by the unit reactive power compensation amount. The specific calculation formula is as follows:

in:

The value range of i is 1-20;

Secondly, the output terminal V of the industrial computer ₆ is connected together with the dynamic reactive power generator input voltage terminal V _in of the secondary control cabinet 7 of the dynamic reactive power generator 5, and the reactive power output of the dynamic reactive power generator 5 is set. It is the minimum reactive power state, and the value of the output terminal V ₁ of the industrial computer 6 is set to the rated voltage value V _HN of the high-voltage side bus 1 of the station under test, and then the secondary control cabinet 7 of the dynamic reactive power generating device 5 The input voltage terminal V _in of the dynamic reactive power generating device is disconnected from the connection terminal of the secondary measurement of the high voltage side voltage transformer 3 on the high voltage side bus bar 1 of the station under test, and the output terminal V ₁ of the industrial computer 6 is used to Replacing the voltage of the busbar 1 on the high-voltage side of the station under test to perform a response characteristic test of the dynamic reactive power generating device 5;

Next, the dynamic reactive power generating device 5 is set under the constant voltage output mode;

Finally, test the various response characteristics of the dynamic var generating device 5 respectively, the steps are as follows:

The first step is to test the response characteristics of the dynamic var generator 5 under general voltage fluctuations: subtract the dead zone voltage V _d of the dynamic var generator 5 from the rated voltage V _HN of the high-voltage side bus 1 to obtain the difference Value, the voltage value of the output terminal _V1 of setting industrial computer 6 is 0.95 times of this difference, collects the dynamic reactive power generating device output voltage terminal V _out on the secondary control cabinet 7 of the dynamic reactive power generating device 5 Voltage value and the current value on the output current terminal _Iout of the dynamic reactive power generating device on the secondary control cabinet 7 of the dynamic reactive power generating device 5, utilize the instantaneous reactive power theory to continuously calculate the output reactive power of the dynamic reactive power generating device 5 Power Q ₁ , the product of the calculated output reactive power Q ₁ and the average value k of the grid bus voltage change plus the rated voltage V _HN of the high-voltage side bus 1 is equal to the industrial computer 6 The voltage value on the output terminal _V1 can be simulated and measured. When the disturbance of 0.95 times of its rated voltage value V _HN occurs on the high-voltage side bus 1, the response characteristics of the dynamic reactive power generating device 5; then, set the industrial control respectively. The output V ₁ of the machine 6 is 0.9 times (V _HN -V _d ), 0.85 times (V _HN -V _d ), 0.8 times (V _HN -V _d ), 0.75 times (V _HN -V _d ), 0.7 times (V _HN -V _d ), 1.05 times (V _HN +V _d ), 1.1 times (V _HN +V _d ), it can be simulated and measured, when 0.9 times (V _HN -V _d ) appears on the high-voltage side bus 1 , 0.85 times (V _HN -V _d ), 0.8 times (V _HN -V _d ), 0.75 times (V _HN -V _d ), 0.7 times (V _HN -V _d ), 1.05 times (V _HN +V _d ) , 1.1 times (V _HN +V _d ) disturbance, the response characteristics of the dynamic reactive power generator 5;

The second step is to test the response characteristics of the dynamic var generator 5 under the low voltage ride-through of the wind farm: set the voltage value of the output terminal of the industrial computer to 0.2 times the rated voltage value of the high-voltage side bus, and collect the dynamic var generator The voltage value on the output voltage terminal V _out of the dynamic reactive power generating device on the secondary control cabinet 7 of the dynamic reactive power generating device 5 and the voltage value on the output current terminal I _out of the dynamic reactive power generating device on the secondary control cabinet 7 of the dynamic reactive power generating device 5 Current value, using the instantaneous reactive power theory to continuously calculate the output reactive power Q ₁ of the dynamic reactive power generator 5, the average value k of the output reactive power Q ₁ of the dynamic reactive power generator 5 and the change value of the grid bus voltage After the product of the product and the rated voltage value V _HN of the high-voltage side bus 1 are added, it is equal to the voltage value on the output terminal V ₁ of the industrial computer 6; it can be simulated and measured that the dynamic reactive power generating device 5 under the low voltage ride-through of the wind farm Response characteristic test;

The third step, the response characteristic test of the dynamic reactive power generation device 5 under the low voltage ride-through of the photovoltaic power station: the voltage value of the output terminal V of the setting industrial computer is 0, and the voltage value of the output terminal _V1 of the industrial computer 6 is set. 0 times of the difference, the voltage value on the output voltage terminal V _out of the dynamic reactive power generating device on the secondary control cabinet 7 of the acquisition dynamic reactive power generating device 5 and the voltage value on the secondary control cabinet 7 of the dynamic reactive power generating device 5 The current value on the output current terminal I _out of the dynamic reactive power generating device, the output reactive power Q ₁ of the dynamic reactive power generating device 5 is continuously calculated by using the instantaneous reactive power theory, and the output reactive power Q of the dynamic reactive power generating device 5 is The product of ₁ and the average value k of the variation value of the grid bus voltage and the rated voltage value V _HN of the high-voltage side bus 1 are added to be equal to the voltage value on the output terminal V ₁ of the industrial computer 6; it can be simulated and measured. Response characteristic test of dynamic reactive power generating device 5 under low voltage ride-through of photovoltaic power station;

Step 4: Test the response characteristics of the dynamic var generator 5 under high voltage ride-through: set the voltage value of the output terminal of the industrial computer to 1.3 times the rated voltage of the high-voltage side busbar, and collect the dynamic var generator 5 The voltage value on the dynamic reactive power generating device output voltage terminal _Vout on the secondary control cabinet 7 and the current value on the dynamic reactive power generating device output current terminal _Iout on the secondary control cabinet 7 of the dynamic reactive power generating device 5, Continuously calculate the output reactive power Q ₁ of the dynamic reactive power generating device 5 by using the instantaneous reactive power theory, the product of the output reactive power Q ₁ of the dynamic reactive power generating device 5 and the average value k of the variation value of the grid bus voltage and The sum of the rated voltage value V _HN of the high-voltage side busbar 1 is equal to the voltage value on the output terminal _V1 of the industrial computer 6; the response characteristics of the dynamic reactive power generator 5 under high voltage ride-through can be simulated and measured.

Claims (3)

1. A dynamic reactive power generator performance detection device based on the secondary disturbance closed-loop response, including the high-voltage side bus (1), the low-voltage side bus (2) and the industrial computer (6), respectively on the low-voltage side bus (2) A dynamic reactive power generating device (5) and a low-voltage side voltage transformer (4) are connected, and a high-voltage side voltage transformer (3) is connected to the high-voltage side busbar (1). It is characterized in that the dynamic reactive power generating device (5 ) The output voltage terminal ( V _out ) of the dynamic var generator of the secondary control cabinet (7) is connected with the industrial computer (6) through the first analog-to-digital converter (8), and the dynamic var generator ( 5) The output current terminal ( I _out ) of the dynamic reactive power generating device of the secondary control cabinet (7) is connected with the industrial computer (6) through the second analog-to-digital converter (9), and the industrial computer (6) The output terminal ( V ₁ ) of the dynamic var generator ( 5 ) is connected with the input voltage terminal ( V _in ) of the dynamic var generator ( 7 ) of the dynamic var generator ( 5 ). 2. A performance detection device for a dynamic reactive power generator based on a secondary disturbance closed-loop response according to claim 1, characterized in that the secondary voltage measurement of the industrial computer (6) and the voltage transformer (3) on the high voltage side The test terminals are connected together, and the industrial computer (6) is connected together with the secondary voltage test terminal of the voltage transformer (4) on the low-voltage side. 3. A dynamic reactive power generation device performance detection method based on secondary disturbance closed-loop response, characterized in that, comprising the following steps: First, determine the average value k of the change value k of the bus voltage of the power grid bus under test that can be caused by the unit reactive power compensation of the dynamic reactive power generating device (5). The specific determination method is: connect the low-voltage The dynamic reactive power generator (5) on the side busbar (2) is set in the constant reactive power output mode, and the reactive output value of the dynamic reactive power generator (5) is continuously adjusted through manual setting, and the adjustment range is: negative From the rated reactive output capacity (- Q _N ) of the dynamic reactive power generator (5) to the rated reactive output capacity ( Q _N ) of the dynamic reactive power generator (5), the amount of change for each setting is the rated reactive output 10% of the capacity, and through the secondary voltage test terminal of the voltage transformer (3) on the high voltage side, read the voltage change value of the bus bar (1) on the high voltage side, and read the voltage of each bus bar (1) on the high voltage side Divide the voltage change value by 10% of the rated reactive power output capacity (0.1 Q _N ), and calculate the change of the bus voltage of the power grid busbar under test that can be caused by the unit reactive power compensation amount of a group of dynamic reactive power generators (5) value, and then average it to obtain the average value k of the change value of the grid bus voltage of the measured station that can be caused by the unit reactive power compensation amount; Secondly, connect the output terminal (V ₁ ) of the industrial computer (6) with the input voltage terminal (V _in ) of the dynamic var generator (7) of the secondary control cabinet (7) of the dynamic var generator (5), and set The reactive power output of the dynamic reactive power generating device (5) is in the minimum reactive power state, and the value of the output terminal (V ₁ ) of the industrial computer (6) is set to the rated voltage value of the high-voltage side busbar (1) of the station under test (V _HN ), and then connect the input voltage terminal (V in ) of the dynamic var generator (V _in ) of the secondary control cabinet (7) of the dynamic var generator (5) to the high voltage side busbar (1) of the station under test The secondary measuring connection end of the high-voltage side voltage transformer (3) is disconnected, and the output terminal (V ₁ ) of the industrial computer (6) is used to replace the voltage of the high-voltage side busbar (1) of the field station under test. Conduct a response characteristic test of the dynamic var generator (5); Next, set the dynamic var generating device (5) in the constant voltage output mode; Finally, test the various response characteristics of the dynamic var generating device (5), the steps are as follows: The first step is to test the response characteristics of the dynamic var generator (5) under general voltage fluctuations: subtract the dead zone voltage of the dynamic var generator (5) from the rated voltage value V _HN of the high-voltage side bus (1) The value V _d obtained the difference ( V _HN - V _d ), set the voltage value of the output terminal (V ₁ ) of the industrial computer (6) to be 0.95 times the difference, and collect the dynamic reactive power generation device (5) The voltage value on the output voltage terminal (V _out ) of the dynamic var generator on the secondary control cabinet (7) and the output of the dynamic var generator on the secondary control cabinet (7) of the dynamic var generator (5) The current value on the current terminal (I _out ), using the instantaneous reactive power theory to continuously calculate the output reactive power Q ₁ of the dynamic reactive power generator (5), the calculated output reactive power Q ₁ and the change of the grid bus voltage The product of the average value k of the value plus the rated voltage value V _HN of the high-voltage side busbar (1) is equal to the voltage value on the output terminal (V ₁ ) of the industrial computer (6), which can be simulated It is determined that when the high-voltage side bus (1) is disturbed by 0.95 times of its rated voltage value V _HN , the response characteristics of the dynamic reactive power generating device (5); then, the output terminals of the industrial computer (6) ( V ₁ ) 0.9 times of the difference ( V _HN - V _d ), 0.85 times of the difference ( V _HN - V _d ), 0.8 times of the difference ( V _HN - V _d ), 0.8 times of the difference ( V _HN - V _d ), 0.75 times of the difference ( V _HN - V _d ), 1.05 times of the difference ( V _HN - V _d ), and 1.1 times of the difference ( V _HN - V _d ), which can be measured by simulation, When 0.9 times of the difference ( V _HN - V _d ), 0.85 times of the difference ( V _HN - V _d ), 0.8 times of the difference ( V _HN - V _d ), or 0.75 times of ( V _HN - V _d ), 0.7 times of difference ( V _HN - V _d ), 1.05 times of difference ( V _HN - V _d ), 1.1 times of difference ( V _HN - V _d ) , the response characteristics of the dynamic var generator (5); The second step is to test the response characteristics of the dynamic reactive power generation device (5) under the low voltage ride-through of the wind farm: set the voltage value of the output terminal of the industrial computer to 0.2 times the rated voltage value of the high-voltage side busbar, and collect dynamic reactive power The voltage value on the output voltage terminal (V out ) of the dynamic reactive power generating device (V _out ) on the secondary control cabinet (7) of the generating device (5) and the voltage value on the secondary control cabinet (7) of the dynamic reactive power generating device (5) The current value on the output current terminal (I _out ) of the dynamic reactive power generator is continuously calculated by using the instantaneous reactive power theory to calculate the output reactive power Q ₁ of the dynamic reactive power generator (5), and the dynamic reactive power generator (5) The product of the output reactive power Q ₁ and the average value k of the change value of the grid bus voltage and the rated voltage value V _HN of the high-voltage side bus (1) is equal to the output terminal (V ₁ ) of the industrial computer (6) The voltage value; it can be simulated and measured, and the response characteristic test of the dynamic reactive power generating device (5) under the low voltage ride-through of the wind farm; The third step is to test the response characteristics of the dynamic reactive power generating device (5) under the low voltage ride-through of the photovoltaic power station: set the voltage value of the output terminal of the industrial computer to 0, and set the output terminal (V) of the industrial computer (6) to ₁ ) the voltage value is 0 times of the difference _, collect the voltage value and dynamic The current value on the output current terminal (I _{out ) of the dynamic reactive power generator (I out} ) on the secondary control cabinet (7) of the reactive power generator (5) is continuously calculated by using the instantaneous reactive power theory of the dynamic reactive power generator (5) output reactive power Q ₁ , the product of the output reactive power Q ₁ of the dynamic reactive power generator (5) and the average value k of the grid bus voltage variation and the rated voltage value V _HN of the high-voltage side bus (1) After the addition, it is equal to the voltage value on the output terminal (V ₁ ) of the industrial computer (6); it can be simulated and measured to test the response characteristics of the dynamic reactive power generating device (5) under the low voltage ride-through of the photovoltaic power station; Step 4: Test the response characteristics of the dynamic reactive power generator (5) under high voltage ride-through: set the voltage value of the output terminal of the industrial computer to 1.3 times the rated voltage value of the high-voltage side bus, and collect the dynamic reactive power generator ( 5) The voltage value on the output voltage terminal (V _out ) of the dynamic reactive power generator on the secondary control cabinet (7) and the dynamic reactive power on the secondary control cabinet (7) of the dynamic reactive power generator (5) The current value on the output current terminal (I _out ) of the generating device, and the output reactive power Q ₁ of the dynamic reactive power generating device (5) is continuously calculated by using the instantaneous reactive power theory, and the output reactive power of the dynamic reactive power generating device (5) The product of the power Q ₁ and the average value k of the change value of the grid bus voltage and the rated voltage value V _HN of the high-voltage side bus (1) is equal to the voltage value on the output terminal V ₁ of the industrial computer (6); that is The response characteristics of the dynamic reactive power generating device (5) under high voltage ride-through can be simulated and measured.