Voltage source converter synchronous switch event processing method, device, equipment, medium and product
By predicting the switching state in a voltage source converter using the voltage, current, and PWM signal of the switching branch, and verifying it using inductor current and capacitor voltage, the problem of computational complexity and low efficiency in synchronous switching event processing of voltage source converters is solved, and efficient synchronous switching processing is achieved.
Patent Information
- Application Number
- CN202411142164.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2026-03-03
AI Technical Summary
Existing methods for handling synchronous switching events in voltage source converters are computationally complex and computationally intensive, affecting simulation efficiency. Furthermore, they cannot accurately handle certain operating conditions, and are prone to misjudgment, especially during DC-side faults.
By judging the switching branch voltage, current and PWM signal of the voltage source converter, the switching state of the switching group is predicted, and the inductor current and capacitor voltage are used for verification. Switching event processing is only performed when the verification is successful, avoiding iterative calculation of the whole system.
It improves the efficiency and accuracy of electromagnetic transient simulation, is applicable to both normal and abnormal operating conditions, reduces the enumeration process, and improves the processing efficiency of synchronous switching events.
Smart Images
Figure CN121597940A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of synchronous switching, and in particular to a method, apparatus, equipment, medium, and product for handling synchronous switching events in a voltage source converter. Background Technology
[0002] Electromagnetic transient simulation is one of the fundamental tools for power system safety and stability analysis, requiring a balance between accuracy and efficiency. With the introduction of the "dual-carbon" goal, China is building a new power system primarily based on renewable energy. To support the large-scale development and utilization of clean energy, technologies such as new energy power generation and DC transmission have developed rapidly in recent years, leading to a continuous increase in the penetration rate of power electronic equipment in power systems. This places higher demands on the accuracy and efficiency of electromagnetic transient simulation. To accurately describe the electromagnetic transient characteristics of a new power system containing a large number of voltage source converters (VSCs), it is necessary to consider synchronous switching events during the simulation process in detail, i.e., to use appropriate switching event processing algorithms to obtain the correct on / off states of switching devices. Synchronous switching refers to the interlocking action of multiple switches at a certain moment during the simulation process due to mutual causal relationships.
[0003] The existing VSC synchronous switch event handling methods mainly have the following problems:
[0004] 1) Traditional methods require iterative calculations of the entire system after each switching action. Such calculations are complex and computationally intensive, which seriously affects simulation efficiency.
[0005] 2) CloudPSS proposes a synchronous switch prediction method to handle synchronous switching between upper and lower bridge arms. However, due to the lack of a post-prediction verification step, it cannot cover all operating conditions, such as misjudgment when there is a DC side fault.
[0006] 3) RTDS proposes a method for predicting synchronous switches based on exhaustive enumeration of switch combinations. Obviously, when the equipment has a large number of switching elements, the exhaustive enumeration method has low computational efficiency. Summary of the Invention
[0007] The purpose of this application is to provide a method, device, equipment, medium, and product for handling synchronous switching events of voltage source converters, which can solve the problem of the contradiction between the accuracy and efficiency of electromagnetic transient simulation in power systems containing VSC converters.
[0008] To achieve the above objectives, this application provides the following solution:
[0009] In a first aspect, this application provides a method for handling synchronous switching events in a voltage source converter. The voltage source converter includes a switching group, an inductor, and a capacitor. The switching group includes a first IGBT, a first diode, a second IGBT, and a second diode. The first IGBT and the first diode constitute the upper bridge arm, and the second IGBT and the second diode constitute the lower bridge arm. The method for handling synchronous switching events in the voltage source converter includes:
[0010] The switching state of the switching group is determined based on the switching branch voltage, switching branch current, and PWM signal of the voltage source converter.
[0011] If the switching state of the switch group changes, the switching state of the switch group is predicted based on the inductor current and the PWM signal.
[0012] Circuit calculations are performed based on the predicted switching states of the switch group to obtain the inductor current and capacitor voltage;
[0013] The predicted switching state of the switch group is verified based on the inductor current and the capacitor voltage; if the verification passes, a switching event is processed; if the verification fails, the switching state of the switch group is re-predicted.
[0014] Secondly, this application provides a synchronous switching event processing device for a voltage source converter, comprising:
[0015] The judgment module is used to determine whether the switching state of the switching group has changed based on the switching branch voltage, switching branch current and PWM signal of the voltage source converter;
[0016] The switch state prediction module is used to predict the switching state of the switch group based on the inductor current and PWM signal when the switching state of the switch group changes.
[0017] The circuit calculation module is used to perform circuit calculations based on the predicted switching state of the switch group to obtain the inductor current and capacitor voltage.
[0018] The verification module is used to verify the predicted switching state of the switch group based on the inductor current and the capacitor voltage; if the verification passes, the switching event is processed; if the verification fails, the switching state of the switch group is re-predicted.
[0019] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the voltage source converter synchronous switching event processing method described above.
[0020] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the voltage source converter synchronous switching event handling method described above.
[0021] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the voltage source converter synchronous switching event processing method described above.
[0022] According to the specific embodiments provided in this application, the following technical effects are disclosed:
[0023] This application provides a method, apparatus, device, medium, and product for handling synchronous switching events in a voltage source converter. When the switching state of the switching group changes, the switching state of the switching group is predicted based on the inductor current and PWM signal. Circuit calculations are performed to obtain the inductor current and capacitor voltage. Then, circuit equivalence is performed to verify the accuracy of the predicted switching state of the switching group. This application utilizes the principle that the inductor current and capacitor voltage cannot change abruptly, treating each phase of the voltage source converter as an independent unit for processing. The processing is confined to the internal power electronic equipment where the switching group is located and is independent of the external system, achieving efficient synchronous switching processing without requiring iterative solutions for the entire system. Furthermore, since the switching group of the voltage source converter consists of a three-phase half-bridge, the switching states of the bridge arms of the three-phase half-bridge can be synchronously processed using the method provided in this application, greatly improving simulation efficiency. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a flowchart illustrating a synchronous switching event handling method for a voltage source converter according to an embodiment of this application.
[0026] Figure 2 This is a schematic diagram of the topology of a voltage source converter;
[0027] Figure 3 This is a schematic diagram of the equivalent circuit;
[0028] Figure 4 To solve the circuit diagram;
[0029] Figure 5 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation
[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] like Figure 2 As shown, a voltage source converter (hereinafter referred to as the converter) includes a switching group, an inductor L and a capacitor. The switching group includes a first IGBT (T1), a first diode D1, a second IGBT (T2) and a second diode D2. The first IGBT and the first diode form the upper bridge arm, and the second IGBT and the second diode form the lower bridge arm.
[0033] In each simulation step, the IGBT turn-on condition in the switching group is the presence of a PWM signal (g) and the branch voltage v ce >0; The IGBT turn-off condition is the absence of a PWM signal (g) or the branch current i ce ≤0; the diode conduction condition is the voltage v across its terminals. d >0; The diode turn-off condition is the diode branch current i d ≤0. Because the IGBTs and diodes in the switching group cannot be turned on simultaneously under normal operating conditions, the switching group has three switching states:
[0034] State 1: Both the IGBT and the diode are in the off state;
[0035] State 2: The IGBT is in the off state, and the diode is in the on state;
[0036] State 3: The IGBT is in the on state, and the diode is in the off state.
[0037] In one exemplary embodiment, such as Figure 1 As shown, a method for handling synchronous switching events in a voltage source converter is provided. This method is executed by a computer device, specifically by a terminal or server alone, or by both a terminal and a server. In this embodiment, the method is described using a server as an example, and includes the following steps S1 to S4. Wherein:
[0038] S1: Determine whether the switching state of the switching group has changed based on the switching branch voltage, switching branch current, and PWM signal of the voltage source converter. The switching branch voltage and switching branch current use the associated reference direction.
[0039] If the PWM signal of the upper bridge arm is 1 or the PWM signal of the lower bridge arm is 1, and the voltage of the switch branch is positive, then the switch branch is determined to be on. If the switch branch of the previous step is off, then the switch state of the switch group is determined to have changed; otherwise, the switch state of the switch group has not changed.
[0040] If the PWM signal of the upper bridge arm is 0 or the PWM signal of the lower bridge arm is 0, and the current of the switch branch is positive, then the switch branch is determined to be off. If the switch branch of the previous step is on, then the switch state of the switch group is determined to have changed. Otherwise, the switch state of the switch group has not changed.
[0041] If the switching state of the switch group changes, the entire system is calculated and the calculation proceeds to the next time step; if the switching state of the switch group changes, step S2 is executed.
[0042] S2: If the switching state of the switch group changes, the switching state of the switch group is predicted based on the inductor current and PWM signal.
[0043] Under normal operating conditions, the PWM signals g1 and g2 of the switching group are complementary (g1 is the PWM signal of the upper bridge arm, and g2 is the PWM signal of the lower bridge arm), and the DC side voltage v P Always greater than voltage v N Next, based on the inductor current i o The size and direction can be analyzed in three cases:
[0044] when i o The direction is outflow from the converter, i. o When <0, if g1g2 changes from 01 to 10, T2 is forcibly turned off, while T1 may be turned on, because i o The current cannot change abruptly. The DC current may flow from point P to point O via T1, or it may flow from point N to point O via D2. Assuming the DC current flows into point O via D2, the voltage v at this time... O equals v N Due to voltage v P Greater than voltage v N At this time, T1 continues to conduct, and the current at point P is injected into point O through T1, and the voltage v O equals v P D2 is turned off due to reverse voltage, so the final circuit state becomes T1 is on and the other switches are off; if g1g2 changes from 10 to 01, T1 is forcibly turned off, and T2 may be turned on, because i oThe current cannot change abruptly; the DC current can only flow from point N through D1 into point O. At this time, the circuit state changes to D2 being on and the other switches being off.
[0045] when i o The size is 0, i o When = 0, if g1g2 changes from 01 to 10, T2 is forcibly turned off. Based on the above analysis, since the voltage v P Greater than voltage v N At this time, T1 is turned on. If g1g2 changes from 10 to 01, T1 is forcibly turned off. Due to the voltage v N ≤v O ≤v P At this time, T2 is turned on.
[0046] when i o When the direction is inflow into the converter, i.e. o When the value is greater than 0, similarly, if g1g2 changes from 01 to 10, the circuit state becomes D1 is on and the other switches are off; if g1g2 changes from 10 to 01, the circuit state becomes T2 is on and the other switches are off.
[0047] The above analysis yields the switch state table under non-blocking conditions, as shown in Table 1. It can be seen that under normal operating conditions, the conduction and cutoff of the upper and lower bridge arms can be determined based on the PWM signals of each IGBT. When the circuit structure becomes a voltage source converter, only the three half-bridges need to be analyzed separately to determine the final state. Therefore, when handling synchronous switching events, the switch state can be predicted based on the PWM signals. Furthermore, when a DC-side open-circuit fault occurs, the inductor current is 0, and based on this condition, the switch state can be predicted as both upper and lower bridge arms being off, thus allowing for the prediction of three possible states.
[0048] Table 1 Switch Status
[0049]
[0050] S3: Based on the predicted switching states of the switch group, perform circuit calculations to obtain the inductor current and capacitor voltage. The calculation method used is the nodal voltage method.
[0051] S4: Verify the predicted switching state of the switch group based on the inductor current and the capacitor voltage; if the verification passes, perform switching event processing; if the verification fails, re-predict the switching state of the switch group. Specifically: Perform equivalent replacement on the inductors and circuits in the voltage source converter to obtain an equivalent circuit; in the equivalent circuit, use controlled current sources and controlled voltage sources to replace the inductors and capacitors, where the value of the controlled current source is the inductor current and the value of the controlled voltage source is the capacitor voltage; solve the equivalent circuit according to the predicted switching state of the switch group to obtain the bridge arm branch voltage and bridge arm branch current; verify the predicted switching state of the switch group based on the bridge arm branch voltage and bridge arm branch current.
[0052] The predicted switching states of the switch groups are verified by checking the values within one simulation step. Figure 2 The voltage source converter shown is equivalent to the one described above. The equivalent circuit is as follows: Figure 3 As shown. The inductor and capacitor are replaced by controlled current and voltage sources, respectively, with values obtained from the inductor current and capacitor voltage calculated in step S3 above. Then, the equivalent circuit is solved using the predicted switching states of the switch group, employing the nodal voltage method. The solved circuit is shown below. Figure 4 As shown, R1 represents the parallel equivalent resistance of S1 and D1, R2 represents the parallel equivalent resistance of S2 and D2, and i g1 and i g2 These represent the current flowing through the upper and lower bridge arms, respectively.
[0053] voltage v o and bridge arm current i g1 i g2 The solution can be obtained quickly using equations (1) and (2).
[0054]
[0055] The switching state of the circuit is then re-determined based on the obtained bridge arm branch voltage and bridge arm branch current. If the determined switching state matches the prediction result, the prediction result is correct, and the circuit enters the switching event processing flow. If the above prediction result does not match the determination result, the switching state is that the remaining upper and lower bridge arms are both conducting. Then, the entire system is updated and solved based on the determined switching state, and the switching event is processed before proceeding to the next time step calculation. The processing of switching events is not discussed in this application.
[0056] This application has the following beneficial effects:
[0057] (1) The different operating states of the converter were considered, and the accurate switching state of the converter switching group was determined according to the proposed synchronous switching event processing method. The switching state can be synchronously switched using this method, which greatly improves the simulation efficiency.
[0058] (2) This application utilizes the principle that inductor current and capacitor voltage cannot change abruptly, treats each phase of the converter as an independent unit, and confines the processing to the power electronic equipment where the switch is located and is independent of the external system, thus realizing efficient processing of synchronous switches without the need for iterative solution of the entire system.
[0059] (3) This application is applicable to both normal and abnormal working conditions, and can avoid the enumeration process after each switching action, thus effectively improving processing efficiency.
[0060] (4) This application will not enter the subsequent judgment process (enumeration process) after each switching action, but will only enter when the prediction result is inconsistent and the verification is performed, which greatly improves the processing efficiency of synchronous switching events.
[0061] Based on the same inventive concept, this application also provides an apparatus for implementing the voltage source converter synchronous switching event processing method described above. The solution provided by this apparatus is similar to the implementation described in the above method; therefore, the specific limitations in one or more embodiments of the voltage source converter synchronous switching event processing apparatus provided below can be found in the limitations of the voltage source converter synchronous switching event processing method described above, and will not be repeated here.
[0062] In one exemplary embodiment, a voltage source converter synchronous switching event processing device is provided, comprising:
[0063] The judgment module is used to determine whether the switching state of the switching group has changed based on the switching branch voltage, switching branch current and PWM signal of the voltage source converter.
[0064] The switch state prediction module is used to predict the switching state of the switch group based on the inductor current and PWM signal when the switching state of the switch group changes.
[0065] The circuit calculation module is used to perform circuit calculations based on the predicted switching state of the switch group to obtain the inductor current and capacitor voltage.
[0066] The verification module is used to verify the predicted switching state of the switch group based on the inductor current and the capacitor voltage; if the verification passes, the switching event is processed; if the verification fails, the switching state of the switch group is re-predicted.
[0067] In one exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments. The computer device may be a server or a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data to be processed. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for handling synchronous switching events in a voltage source converter.
[0068] Those skilled in the art will understand that Figure 5 The structures shown are merely block diagrams of some structures related to the present application and do not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than shown in the figures, or combine certain components, or have different component arrangements. In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.
[0069] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0070] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0071] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.
[0072] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).
[0073] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0075] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for handling synchronous switching events in a voltage source converter, wherein the voltage source converter includes a switching group, an inductor, and a capacitor, the switching group including a first IGBT, a first diode, a second IGBT, and a second diode, the first IGBT and the first diode forming an upper bridge arm, and the second IGBT and the second diode forming a lower bridge arm, characterized in that, The voltage source converter synchronous switching event handling method includes: The switching state of the switching group is determined based on the switching branch voltage, switching branch current, and PWM signal of the voltage source converter. If the switching state of the switch group changes, the switching state of the switch group is predicted based on the inductor current and the PWM signal. Circuit calculations are performed based on the predicted switching states of the switch group to obtain the inductor current and capacitor voltage; The predicted switching state of the switch group is verified based on the inductor current and the capacitor voltage; if the verification passes, a switching event is processed; if the verification fails, the switching state of the switch group is re-predicted.
2. The method for handling synchronous switching events in a voltage source converter according to claim 1, characterized in that, The switching state of the switching group is determined based on the switching branch voltage, switching branch current, and PWM signal of the voltage source converter. Specifically, this includes: If the PWM signal of the upper bridge arm is 1 or the PWM signal of the lower bridge arm is 1, and the voltage of the switch branch is positive, and the switch branch of the previous step is turned off, then it is determined that the switching state of the switch group has changed; otherwise, the switching state of the switch group has not changed. If the PWM signal of the upper bridge arm is 0 or the PWM signal of the lower bridge arm is 0, and the current of the switch branch is positive, and the switch branch of the previous step is on, then it is determined that the switching state of the switch group has changed; otherwise, the switching state of the switch group has not changed.
3. The method for handling synchronous switching events in a voltage source converter according to claim 1, characterized in that, Predicting the switching state of the switching group based on inductor current and PWM signal, specifically including: When the inductor current is less than zero and the PWM signal of the switching group is 10, the upper bridge arm is turned on and the lower bridge arm is turned off. When the inductor current is less than zero and the PWM signal of the switching group is 01, the upper bridge arm is turned off and the lower bridge arm is turned on. When the inductor current is zero and the PWM signal of the switching group is 10, the upper bridge arm is turned on and the lower bridge arm is turned off. When the inductor current is zero and the PWM signal of the switching group is 01, the upper bridge arm is turned off and the lower bridge arm is turned on. When the inductor current is greater than zero and the PWM signal of the switching group is 10, the upper bridge arm is turned on and the lower bridge arm is turned off. When the inductor current is greater than zero and the PWM signal of the switching group is 01, the upper bridge arm is turned off and the lower bridge arm is turned on.
4. The method for handling synchronous switching events in a voltage source converter according to claim 1, characterized in that, Based on the predicted switching states of the switch group, circuit calculations are performed to obtain the inductor current and capacitor voltage, specifically including: Based on the predicted switching state of the switch group, the nodal voltage method is used to perform circuit calculations to obtain the inductor current and capacitor voltage.
5. The method for handling synchronous switching events in a voltage source converter according to claim 1, characterized in that, The predicted switching state of the switch group is verified based on the inductor current and the capacitor voltage, specifically including: The inductors and circuits in the voltage source converter are replaced by equivalent circuits to obtain an equivalent circuit. In the equivalent circuit, a controlled current source and a controlled voltage source are used to replace the inductors and capacitors. The value of the controlled current source is the inductor current, and the value of the controlled voltage source is the capacitor voltage. The equivalent circuit is solved based on the predicted switching state of the switch group to obtain the bridge arm branch voltage and bridge arm branch current. The predicted switching state of the switch group is verified based on the voltage and current of the bridge arm branch.
6. The method for handling synchronous switching events in a voltage source converter according to claim 5, characterized in that, The equivalent circuit is solved based on the predicted switching states of the switch group to obtain the bridge arm branch voltage and bridge arm branch current, specifically including: Based on the switching state of the switch group, the equivalent circuit is solved using the nodal voltage method to obtain the inductor current and capacitor voltage.
7. A synchronous switching event processing device for a voltage source converter, wherein the voltage source converter includes a switching group, an inductor, and a capacitor, the switching group includes a first IGBT, a first diode, a second IGBT, and a second diode, the first IGBT and the first diode forming an upper bridge arm, and the second IGBT and the second diode forming a lower bridge arm, characterized in that, The voltage source converter synchronous switching event processing device includes: The judgment module is used to determine whether the switching state of the switching group has changed based on the switching branch voltage, switching branch current and PWM signal of the voltage source converter; The switch state prediction module is used to predict the switching state of the switch group based on the inductor current and PWM signal when the switching state of the switch group changes. The circuit calculation module is used to perform circuit calculations based on the predicted switching state of the switch group to obtain the inductor current and capacitor voltage. The verification module is used to verify the predicted switching state of the switch group based on the inductor current and the capacitor voltage; if the verification passes, the switching event is processed; if the verification fails, the switching state of the switch group is re-predicted.
8. A computer device, comprising: The memory and processor contain a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the steps of the voltage source converter synchronous switching event handling method according to any one of claims 1-6.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the synchronous switching event handling method for a voltage source converter as described in any one of claims 1-6.
10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the synchronous switching event handling method for a voltage source converter as described in any one of claims 1-6.