High and low transient voltage simulation regulation and control system and method based on magnetically controlled reactor

Abstract

The invention provides a high and low transient voltage simulation regulation and control system and method based on a magnetically controlled reactor. The system comprises a high / low transient voltage generation system based on the magnetically controlled reactor, a local measurement and control system and a remote monitoring system. The simulation regulation and control system further comprises a simulation regulation and control system inlet wire switch K1, a system outlet wire switch K2, a bypass switch S1, a magnetic control current limiting reactor Xr, a step-down circuit breaker K3, a step-down circuit breaker K4, a magnetic control step-down reactor L1, a capacitor C and a magnetic control step-up reactor L2, and switching between a test working condition and a conventional working condition is carried out through switching-off and switching-on of the bypass switch S1. The magnetic control current-limiting reactor Xr and the magnetic control step-down reactor L1 form impedance partial voltage, and smooth change of an impedance value is realized through magnetic control so as to simulate voltage drop of a power grid; the magnetic control current limiting reactor Xr, the capacitor C and the magnetic control boost reactor L2 form a capacitor boost, and the reactance of the L2 is changed through magnetic control to change the flow of reactive power in a line, so that the voltage rise of a power grid is simulated.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation and grid connection, and in particular to a high and low transient voltage simulation control system and method based on a magnetically controlled reactor. Background Art

[0002] In recent years, the popularization of photovoltaic and wind power generation technologies has promoted the rapid growth of grid-connected installed capacity of new energy generators. The operation and control strategies of these units have an important impact on the safe and stable operation of the power system under the condition of grid faults. The statistical analysis results of recent new energy grid-offline accidents show that large-scale grid-offline accidents all have the characteristics of "low voltage + high voltage", which is manifested as after the grid voltage drop fault occurs, some new energy units with low voltage tolerance are disconnected from the grid because the terminal voltage is too high, thus triggering the high voltage protection action. With the popularization of low voltage tolerance test of new energy units, high voltage has become one of the important reasons for new energy grid disconnection in the new stage. At present, the research focus is mostly on the simulation of grid voltage drop faults in new energy power generation systems, while the simulation and regulation of the sharp rise of grid voltage is relatively lacking. In order to more accurately simulate the actual grid fault situation and meet the test requirements of new energy power generation systems under high voltage conditions, it is very important to develop a transient simulation system that can simulate low voltage and high voltage at the same time.

[0003] At present, there are three main technical routes for voltage transient simulation control systems: impedance form, transformer form, and power electronic conversion form. The transformer form of transient voltage simulation control system will generate large voltage / current stress when the tap is switched, and it is recommended that the transformer capacity is twice that of the device under test. The device using this solution has a short life and high cost; the power electronic conversion form requires the converter to withstand a certain voltage conversion rate, which makes the simulation system costly and large in size. The impedance form of voltage transient simulation control system is the most widely used, but its reactor needs to have taps with different impedance values. During testing, it is necessary to frequently select taps and combine the reactors in series and parallel to obtain the desired test voltage, which greatly reduces the test efficiency.

[0004] At present, there is no integrated system for high / low transient voltage simulation and control based on impedance, which cannot simultaneously meet the "low voltage + high voltage" testing requirements of new energy power generation systems.

[0005] The impedance-based low transient voltage simulation control system uses different series-parallel combinations of reactors to achieve test voltage. The voltage switching steps are complicated and the test efficiency is low. Summary of the invention

[0006] The present invention provides a high and low transient voltage simulation control system and method based on a magnetically controlled reactor, which solves the problems of insufficient test range and low test efficiency of the existing technical solutions. In order to solve the above technical problems, the technical solution adopted by the present invention is: A high / low transient voltage analog control system based on a magnetically controlled reactor, comprising a high / low transient voltage generating system based on a magnetically controlled reactor, a local measurement and control system, and a remote monitoring system; It also includes the simulated control system incoming switch K1, the system outgoing switch K2, the bypass switch S1, the magnetically controlled current limiting reactor Xr, the step-down circuit breaker K3, the step-down circuit breaker K4, the magnetically controlled step-down reactor L1, the capacitor C and the magnetically controlled step-up reactor L2. The test operating condition and the normal operating condition are switched by opening and closing the bypass switch S1.

[0007] The above-mentioned simulation control system incoming switch K1 is connected to the external power grid isolation transformer, the system incoming switch K1 is connected in series with the magnetically controlled current limiting reactor Xr, the system outgoing switch K2 is connected to the tested new energy power generation system, the step-down circuit breaker K3 is connected in series with the magnetically controlled step-down reactor L1, the step-up circuit breaker K4 controls the capacitor C and the magnetically controlled step-up reactor L2 at the same time, the capacitor C is connected in parallel with the magnetically controlled step-up transformer L2; the end of the magnetically controlled step-down reactor L1, the capacitor C, and the magnetically controlled step-up transformer L2 that is not connected to the circuit breaker is grounded; the bypass switch S1 is connected in parallel with the magnetically controlled current limiting reactor Xr.

[0008] The initial state of the bypass switch S1 is closed, the initial states of the system incoming switch K1 and the system outgoing switch K2 are closed, and the initial states of the circuit breakers K3 and K4 are open.

[0009] The above-mentioned closed system incoming switch K1 and system outgoing switch K2 enable the high / low transient voltage simulation control system to be connected to the power grid and the system under test; When the voltage at the transient voltage test point needs to be reduced, the bypass switch S1 is disconnected, and the step-down circuit breaker K3 is closed. By adjusting the reactance values ​​of the magnetically controlled current limiting reactor Kr and the magnetically controlled step-down reactor L1, the reactance ratio of the two changes to obtain different transient voltage drop amplitudes. When the voltage at the transient voltage test point needs to be raised, the step-down circuit breaker K3 is disconnected, the step-up circuit breaker K4 is closed, and the reactance value of the magnetically controlled current limiting reactor is kept unchanged. By adjusting the reactance values ​​of the capacitor C and the magnetically controlled boost reactor L2, different transient voltage raising amplitudes can be obtained.

[0010] The above-mentioned magnetically controlled current limiting reactor Xr, magnetically controlled step-down reactor L1, and magnetically controlled step-up transformer L2 are all equipped with control modules to enable the reactors to exhibit specific reactance values ​​within a specified time.

[0011] The three-phase high / low transient voltage parameters of the above-mentioned analog control system are the same, but the control module can realize independent control of one of the phases.

[0012] The impedance of the magnetically controlled current limiting reactor Xr is X xr , the resistance of the magnetically controlled current limiting reactor Xr is R xr , there is X xr / R xr >10.

[0013] The above-mentioned local measurement and control system is connected to the high / low transient voltage generating system and communicates with the remote monitoring system at the same time. The local measurement and control system collects information from the voltage generating system, performs analysis and judgment, and implements voltage control. It can also upload voltage change information to an external remote monitoring system through the network function.

[0014] Using the above-mentioned control method of the high and low transient voltage simulation control system based on the magnetically controlled reactor, the specific steps of carrying out low transient voltage simulation control are as follows: Step 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, magnetically controlled step-down reactor L1, capacitor C, magnetically controlled step-up reactor L2, etc., have been installed and inspected; Step 2. Keep the bypass switch S1 closed to ensure that the system is in normal working mode. Close the system inlet switch K1 and the system outlet switch K2 to connect the simulation control system with the external power grid and the new energy power generation system under test; Step 3, disconnect the bypass switch S1 to connect the magnetically controlled current limiting reactor Xr in series with the system; close the step-down circuit breaker K3 to connect the magnetically controlled step-down reactor L1 in series with the system; Step 4, adjust the reactance values ​​of the magnetically controlled current limiting reactor Xr and the magnetically controlled voltage-reducing reactor L1 through the control module to achieve the required low transient voltage drop amplitude; Step 5. Use the local measurement and control system to monitor voltage changes in real time to ensure that the voltage drop meets the test requirements. Record all key data during the test, including voltage, current, time and other parameters; analyze the data to evaluate the performance and stability of the new energy power generation system under low transient voltage conditions; Step 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

[0015] Using the above-mentioned control method of the high and low transient voltage simulation control system based on the magnetically controlled reactor, the specific steps of carrying out high transient voltage simulation control are as follows: Step 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, capacitor C, magnetically controlled boost reactor L2, etc., have been installed and inspected; Step 2, keep the bypass switch S1 closed to ensure that the system is in normal working mode; close the system incoming switch K1 and the system outgoing switch K2, and connect the simulation control system with the external power grid and the new energy power generation system under test; Step 3, disconnect the bypass switch S1, disconnect the step-down circuit breaker K3, ensure that the magnetically controlled step-down reactor L1 is not involved in the circuit, close the boost circuit breaker K4, and connect the capacitor C and the magnetically controlled boost reactor L2 in series with the system; Step 4, adjust the reactance value of the magnetically controlled boost reactor L2 through the control module to achieve the required high transient voltage rise amplitude; Step 5. Use the local measurement and control system to monitor the changes in voltage and reactive power in real time to ensure that the voltage rise meets the test requirements; record all key data during the test, including voltage rise amplitude, current, reactive power, time and other parameters; analyze the recorded data to evaluate the performance and stability of the new energy power generation system under high transient voltage conditions; Step 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

[0016] The present invention provides a high and low transient voltage simulation control system and method based on a magnetically controlled reactor. A magnetically controlled current limiting reactor Xr and a magnetically controlled step-down reactor L1 form an impedance voltage divider, and a smooth change of the impedance value is achieved through magnetic control to simulate a grid voltage drop; the magnetically controlled current limiting reactor Xr, a capacitor C and a magnetically controlled boost reactor L2 form a capacitor boost, and the reactance of L2 is changed by magnetic control to change the flow of reactive power in the line, thereby simulating a grid voltage rise.

[0017] 1. The impedance value of the reactor changes smoothly, avoiding arcing and large voltage / current stress during traditional mechanical tap switching, and improving the service life of the test equipment and the test safety factor.

[0018] 2. The reactance value of the reactor is controlled by the control module, and it is no longer necessary to connect multiple groups of reactors in series or parallel to obtain the desired value.

[0019] 3. Three-phase independent control; able to independently realize voltage drop and rise of each phase.

[0020] 4. The local measurement and control system is connected to the high / low transient voltage generation system and can communicate with the remote monitoring system to achieve real-time monitoring and control of voltage change information. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the principle of a high / low transient voltage simulation control system based on a magnetically controlled reactor of the present invention.

[0022] Figure 2 The present invention is a flowchart of a low transient voltage simulation control system operation.

[0023] Figure 3 The present invention is a flowchart of a high transient voltage simulation control system operation. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following content will systematically and completely describe the specific technical solutions of the present invention in combination with the drawings provided according to the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] Embodiment 1: The present invention provides a high / low transient voltage simulation control system with real working conditions and accurate control, comprising a high / low transient voltage generating system based on a magnetically controlled reactor, a local measurement and control system and a remote monitoring system.

[0026] A high / low transient voltage analog control system based on a magnetically controlled reactor comprises a system incoming switch K1, a system outgoing switch K2, a bypass switch S1, a magnetically controlled current limiting reactor Xr, a step-down circuit breaker K3, a step-down circuit breaker K4, a magnetically controlled step-down reactor L1, a capacitor C, and a magnetically controlled step-up reactor L2.

[0027] The external grid isolation transformer is connected to the incoming switch K1 of the simulation control system, the incoming switch K1 of the system is connected in series with the magnetically controlled current limiting reactor Xr, the outgoing switch K2 of the system is connected to the tested new energy power generation system, the step-down circuit breaker K3 is connected in series with the magnetically controlled step-down reactor L1, the step-up circuit breaker K4 controls the capacitor C and the magnetically controlled step-up reactor L2 at the same time, and the capacitor C is connected in parallel with the magnetically controlled step-up transformer L2. The end of the magnetically controlled step-down reactor L1, the capacitor C, and the magnetically controlled step-up transformer L2 that is not connected to the circuit breaker is grounded. The bypass switch S1 is connected in parallel with the magnetically controlled current limiting reactor Xr, and the test experimental condition and the normal condition are switched by opening and closing the bypass switch S1.

[0028] The initial state of the bypass switch S1 is closed, the system incoming switch K1 and the system outgoing switch K2 are closed, and the circuit breakers K3 and K4 are open.

[0029] Close the system incoming switch K1 and the system outgoing switch K2 to connect the high / low transient voltage simulation control system to the power grid and the system under test. When the voltage at the transient voltage test point needs to be lowered, disconnect the bypass switch S1 and close the step-down circuit breaker K3. By adjusting the reactance values ​​of the magnetically controlled current limiting reactor Kr and the magnetically controlled step-down reactor L1, the ratio of the reactances of the two changes to obtain different transient voltage drop amplitudes. When the voltage at the transient voltage test point needs to be raised, disconnect the step-down circuit breaker K3 and close the step-up circuit breaker K4. Keep the reactance value of the magnetically controlled current limiting reactor unchanged. By adjusting the reactance values ​​of the capacitor C and the magnetically controlled step-up reactor L2, different transient voltage raising amplitudes can be obtained.

[0030] The advantage of the magnetically controlled reactor is that its reactance value can be smoothly adjusted within a large range. The magnetically controlled current limiting reactor Xr, the magnetically controlled step-down reactor L1, and the magnetically controlled step-up transformer L2 are all equipped with control modules, which can achieve a specific reactance value for the reactor within a specified time; the parameters of the three-phase high / low transient voltage simulation control system are the same, but the control module can achieve independent control of a certain phase.

[0031] In order to reduce the active power consumption of the magnetically controlled current limiting reactor Xr on its resistance, it is required that Xr xr / R xr >10.

[0032] The local measurement and control system is connected to the high / low transient voltage generation system and communicates with the remote monitoring system. The local measurement and control system collects information from the voltage generation system, performs analysis and judgment to implement voltage control, and can also upload voltage change information to an external remote monitoring system through the network function.

[0033] Embodiment 2: A high / low transient voltage analog control system based on magnetically controlled reactor, the system schematic diagram is as follows Figure 1 As shown, the system is based on the principles of impedance voltage division and reactive voltage boosting, and can simulate voltage drop or voltage rise faults generated by the power grid to meet the "low voltage + high voltage" testing requirements of the new energy power generation system.

[0034] The system includes a system incoming switch K1, a system outgoing switch K2, a bypass switch S1, a magnetically controlled current limiting reactor Xr, a step-down circuit breaker K3, a step-down circuit breaker K4, a magnetically controlled step-down reactor L1, a capacitor C, and a magnetically controlled step-up reactor L2. The external power grid isolation transformer is connected to the analog control system incoming switch K1, the system incoming switch K1 is connected in series with the magnetically controlled current limiting reactor Xr, the system outgoing switch K2 is connected to the measured new energy power generation system, the step-down circuit breaker K3 is connected in series with the magnetically controlled step-down reactor L1, the step-up circuit breaker K4 controls the capacitor C and the magnetically controlled step-up reactor L2 at the same time, and the capacitor C is connected in parallel with the magnetically controlled step-up transformer L2. The end of the magnetically controlled step-down reactor L1, the capacitor C, and the magnetically controlled step-up transformer L2 that is not connected to the circuit breaker is grounded. The bypass switch S1 is connected in parallel with the magnetically controlled current limiting reactor Xr, and the test operating condition and the normal operating condition are switched by opening and closing the bypass switch S1.

[0035] The specific steps for carrying out low transient voltage simulation control are as follows: 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, magnetically controlled step-down reactor L1, capacitor C, magnetically controlled step-up reactor L2, etc., have been installed and inspected; 2. Keep the bypass switch S1 closed to ensure that the system is in normal working mode. Close the system inlet switch K1 and the system outlet switch K2 to connect the simulation control system with the external power grid and the new energy power generation system under test; 3. Open the bypass switch S1 to connect the magnetically controlled current limiting reactor Xr in series with the system. Close the step-down circuit breaker K3 to connect the magnetically controlled step-down reactor L1 in series with the system; 4. Adjust the reactance values ​​of the magnetically controlled current limiting reactor Xr and the magnetically controlled voltage-reducing reactor L1 through the control module to achieve the required low transient voltage drop amplitude; 5. Use the local measurement and control system to monitor voltage changes in real time to ensure that the voltage drop meets the test requirements; record all key data during the test, including voltage, current, time and other parameters; analyze the data to evaluate the performance and stability of the new energy power generation system under low transient voltage conditions.

[0036] 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

[0037] The specific steps for carrying out high transient voltage simulation control are as follows: 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, capacitor C, magnetically controlled boost reactor L2, etc., have been installed and inspected; 2. Keep the bypass switch S1 closed to ensure that the system is in normal working mode. Close the system inlet switch K1 and the system outlet switch K2 to connect the simulation control system with the external power grid and the new energy power generation system under test; 3. Disconnect the bypass switch S1, disconnect the step-down circuit breaker K3, ensure that the magnetically controlled step-down reactor L1 is not involved in the circuit, close the boost circuit breaker K4, and connect the capacitor C and the magnetically controlled boost reactor L2 in series with the system; 4. Adjust the reactance value of the magnetically controlled boost reactor L2 through the control module to achieve the required high transient voltage rise amplitude; 5. Use the local measurement and control system to monitor the changes in voltage and reactive power in real time to ensure that the voltage rise meets the test requirements; record all key data during the test, including voltage rise amplitude, current, reactive power, time and other parameters; analyze the recorded data to evaluate the performance and stability of the new energy power generation system under high transient voltage conditions.

[0038] 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

[0039] The present invention has the following improvements: 1. The magnetically controlled current limiting reactor Xr, the magnetically controlled voltage-stepping reactor L1 and the magnetically controlled voltage-stepping reactor L2 are magnetically controlled reactors. The advantages of the magnetically controlled reactors are that the reactance adjustment range is large and the reactance changes smoothly, which avoids arcing and large voltage / current stresses generated during traditional mechanical tap switching, and improves the service life of the test equipment and the test safety factor; the reactance value of the reactor is controlled by the control module, and there is no need to connect multiple groups of reactors in series and parallel to obtain the desired size.

[0040] 2. Through K3 and K4 and their branches, voltage drop and voltage rise can be achieved at the transient voltage test point using only one set of equipment.

Claims

1. A high and low transient voltage simulation control system based on magnetically controlled reactors, characterized in that: It includes high / low transient voltage generation system based on magnetically controlled reactor, local measurement and control system and remote monitoring system; It also includes the simulated control system incoming switch K1, the system outgoing switch K2, the bypass switch S1, the magnetically controlled current limiting reactor Xr, the step-down circuit breaker K3, the step-down circuit breaker K4, the magnetically controlled step-down reactor L1, the capacitor C and the magnetically controlled step-up reactor L2. The test operating condition and the normal operating condition are switched by opening and closing the bypass switch S1.

2. According to the high and low transient voltage simulation control system based on magnetic controlled reactor described in claim 1, it is characterized in that: The analog control system incoming switch K1 is connected to the external power grid isolation transformer, the system incoming switch K1 is connected in series with the magnetically controlled current limiting reactor Xr, the system outgoing switch K2 is connected to the tested new energy power generation system, the step-down circuit breaker K3 is connected in series with the magnetically controlled step-down reactor L1, the step-up circuit breaker K4 controls the capacitor C and the magnetically controlled step-up reactor L2 at the same time, the capacitor C is connected in parallel with the magnetically controlled step-up transformer L2; the end of the magnetically controlled step-down reactor L1, the capacitor C, and the magnetically controlled step-up transformer L2 that is not connected to the circuit breaker is grounded; the bypass switch S1 is connected in parallel with the magnetically controlled current limiting reactor Xr.

3. According to the high and low transient voltage simulation control system based on magnetically controlled reactors as described in claim 2, it is characterized in that: The bypass switch S1 is initially closed, the system inlet switch K1 and the system outlet switch K2 are initially closed, and the circuit breakers K3 and K4 are initially open.

4. According to the high and low transient voltage simulation control system based on magnetic controlled reactor as described in claim 3, it is characterized in that: The closed system inlet switch K1 and the system outlet switch K2 enable the high / low transient voltage simulation control system to be connected to the power grid and the system under test; When the voltage at the transient voltage test point needs to be reduced, the bypass switch S1 is disconnected, and the step-down circuit breaker K3 is closed. By adjusting the reactance values ​​of the magnetically controlled current limiting reactor Kr and the magnetically controlled step-down reactor L1, the reactance ratio of the two changes to obtain different transient voltage drop amplitudes. When the voltage at the transient voltage test point needs to be raised, the step-down circuit breaker K3 is disconnected, the step-up circuit breaker K4 is closed, and the reactance value of the magnetically controlled current limiting reactor is kept unchanged. By adjusting the reactance values ​​of the capacitor C and the magnetically controlled boost reactor L2, different transient voltage raising amplitudes can be obtained.

5. According to the high and low transient voltage simulation control system based on magnetic controlled reactor as described in claim 4, it is characterized in that: The magnetically controlled current limiting reactor Xr, the magnetically controlled step-down reactor L1 and the magnetically controlled step-up transformer L2 are all equipped with control modules to enable the reactors to exhibit specific reactance values ​​within a specified time.

6. According to the high and low transient voltage simulation control system based on magnetically controlled reactors as described in claim 5, it is characterized in that: The three-phase high / low transient voltage parameters of the analog control system are the same, but the control module can realize independent control of one of the phases.

7. A high and low transient voltage simulation control system based on a magnetically controlled reactor according to claim 6, characterized in that: The impedance of the magnetically controlled current limiting reactor Xr is X xr , the resistance of the magnetically controlled current limiting reactor Xr is R xr , there is X xr / R xr >10.

8. A high and low transient voltage simulation control system based on a magnetically controlled reactor according to claim 7, characterized in that: The local measurement and control system is connected to the high / low transient voltage generating system and communicates with the remote monitoring system. The local measurement and control system collects information from the voltage generating system, performs analysis and judgment to implement voltage control, and can also upload voltage change information to an external remote monitoring system through the network function.

9. A control method for a high and low transient voltage simulation control system based on a magnetically controlled reactor according to claim 8, characterized in that: The specific steps for carrying out low transient voltage simulation control are as follows: Step 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, magnetically controlled step-down reactor L1, capacitor C, magnetically controlled step-up reactor L2, etc., have been installed and inspected; Step 2, keep the bypass switch S1 closed to ensure that the system is in normal working mode; close the system incoming switch K1 and the system outgoing switch K2, and connect the simulation control system with the external power grid and the new energy power generation system under test; Step 3, disconnect the bypass switch S1 to connect the magnetically controlled current limiting reactor Xr in series with the system; close the step-down circuit breaker K3 to connect the magnetically controlled step-down reactor L1 in series with the system; Step 4, adjust the reactance values ​​of the magnetically controlled current limiting reactor Xr and the magnetically controlled voltage-reducing reactor L1 through the control module to achieve the required low transient voltage drop amplitude; Step 5. Use the local measurement and control system to monitor voltage changes in real time to ensure that the voltage drop meets the test requirements; record all key data during the test, including voltage, current, time and other parameters; analyze the data to evaluate the performance and stability of the new energy power generation system under low transient voltage conditions; Step 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

10. A control method for a high and low transient voltage simulation control system based on a magnetically controlled reactor according to claim 9, characterized in that: The specific steps for carrying out high transient voltage simulation control are as follows: Step 1. Ensure that all equipment and components, including magnetically controlled current limiting reactor Xr, capacitor C, magnetically controlled boost reactor L2, etc., have been installed and inspected; Step 2, keep the bypass switch S1 closed to ensure that the system is in normal working mode; close the system incoming switch K1 and the system outgoing switch K2, and connect the simulation control system with the external power grid and the new energy power generation system under test; Step 3, disconnect the bypass switch S1, disconnect the step-down circuit breaker K3, ensure that the magnetically controlled step-down reactor L1 is not involved in the circuit, close the boost circuit breaker K4, and connect the capacitor C and the magnetically controlled boost reactor L2 in series with the system; Step 4, adjust the reactance value of the magnetically controlled boost reactor L2 through the control module to achieve the required high transient voltage rise amplitude; Step 5. Use the local measurement and control system to monitor the changes in voltage and reactive power in real time to ensure that the voltage rise meets the test requirements; record all key data during the test, including voltage rise amplitude, current, reactive power, time and other parameters; analyze the recorded data to evaluate the performance and stability of the new energy power generation system under high transient voltage conditions; Step 6. After completing the test, disconnect all related circuit breakers and restore bypass switch S1 to the closed state to ensure that the system safely exits the test mode.

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