CN115224700A

CN115224700A - Thyristor switching switch control method and device, electronic equipment and storage medium

Info

Publication number: CN115224700A
Application number: CN202211140240.2A
Authority: CN
Inventors: 宋国伟; 秦玲; 李新娟; 曲艳智; 李姗姗
Original assignee: Dongfang Power Beijing Technology Co ltd
Current assignee: Dongfang Power Beijing Technology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2022-10-21

Abstract

The application provides a control method and device of a thyristor switching switch, electronic equipment and a storage medium, which are applied to the technical field of electronic power, and particularly, when an alternating current power supply system needs to be compensated, a control signal of the thyristor switching switch on a C-phase channel is controlled to be started to conduct the C-phase channel; when the phase reaches 120 degrees after the voltage of the thyristor switching switch on the phase C circuit crosses zero, the control signal of the thyristor switching switch on the phase A circuit is controlled to be started so as to conduct the phase A circuit; and when the C-phase passage, the A-phase passage and the B-phase passage are all conducted, determining that the compensation system is put into an alternating current power supply system. When the compensation system is put into use, the putting sequence of the thyristor switching switches on the phase C path and the phase A path is controlled, and the paths corresponding to the thyristor switching switches of all phases can be ensured to be put into use, so that the accuracy of putting control over the thyristor switching switches is improved, and the compensation system can be further ensured to be quickly put into an alternating current power supply system.

Description

Thyristor switching switch control method and device, electronic equipment and storage medium

Technical Field

The present disclosure relates to the field of electronic power technologies, and in particular, to a method and an apparatus for controlling a thyristor switch, an electronic device, and a storage medium.

Background

Power electronics are increasingly used in ac power supply systems, and the use of these devices generates a large amount of reactive power and harmonics. The compensation system can compensate the reactive power and the harmonic in the alternating current power supply system; aiming at the load with rapid change and frequent start-stop of the alternating current power supply system, a quick zero-crossing fling-cut switch is needed for dynamic reactive power compensation, wherein the thyristor fling-cut switch is a quick zero-crossing fling-cut switch with high utilization rate.

However, in the compensation process, the phases of the current and the voltage on the capacitor in the compensation system are orthogonal in advance, and residual voltage may exist on the capacitor at the moment of switching off the thyristor switching switch, which may cause that the charging voltage of some phase capacitors may be greater than the peak value of the line voltage, so that the thyristor cannot be switched on any more, and further the compensation system is influenced to be rapidly put into an alternating current power supply system for compensation.

Disclosure of Invention

In view of this, an object of the present application is to provide a method and an apparatus for controlling a thyristor switch, an electronic device, and a storage medium, which control the switching sequence of the thyristor switches in the phase C path and the phase a path when the compensation system is switched in, so as to ensure that all paths corresponding to the thyristor switches of each phase can be switched in, thereby improving the accuracy of switching control of the thyristor switches, and further ensuring that the compensation system can be quickly switched in an ac power supply system.

In a first aspect, an embodiment of the present application provides a method for controlling a thyristor switching switch, where a compensation system is connected to an ac power supply system through the thyristor switching switch, and the compensation system is switched into the ac power supply system or switched off from the ac power supply system by switching on and off the thyristor switching switch; the control method comprises the following steps:

when the alternating current power supply system is determined to need compensation, controlling a control signal of a thyristor switching switch on a C-phase channel to be started so as to conduct the C-phase channel;

when the phase of the thyristor switching switch on the phase C circuit reaches 120 degrees after the voltage of the thyristor switching switch on the phase A circuit crosses zero, controlling a control signal of the thyristor switching switch on the phase A circuit to be started so as to conduct the phase A circuit; and when the C-phase path, the A-phase path and the B-phase path are all conducted, determining that the compensation system is put into the alternating current power supply system.

In one possible embodiment, the control method further includes:

when the AC power supply system is determined to be compensated, controlling a control signal of a thyristor switching switch on the phase A circuit to be started so as to cut off the phase A circuit from the AC power supply system;

when the phase reaches 240 degrees after the voltage of the thyristor switching switch on the phase-A circuit crosses zero, controlling the control signal of the thyristor switching switch on the phase-C circuit to be turned on so as to cut off the phase-C circuit from the alternating current power supply system; and when the C-phase path, the A-phase path and the B-phase path are all cut off from the alternating current power supply system, determining that the compensation system is cut off from the alternating current power supply system.

In a possible implementation manner, the alternating current power supply system is a three-phase voltage system, and the compensation system is respectively connected with each phase line of the alternating current power supply system through a thyristor switching switch; when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system, the phase C circuit is conducted through the following steps:

when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase C circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the phase C circuit is started, and the phase C circuit is conducted.

In one possible embodiment, when the cathode of the thyristor-switched switch is connected to the phase line and the anode of the thyristor-switched switch is connected to the compensation system, the phase C circuit is turned on by:

when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase C circuit crosses zero point from positive direction to negative direction, the control signal of the thyristor switching switch on the phase C circuit is started, and the phase C circuit is conducted.

In one possible embodiment, the a-phase path is cut out of the ac power supply system by:

and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from positive to negative, the control signal of the thyristor switching switch on the phase A circuit is started, and the phase A circuit is cut off from the alternating current power supply system.

In one possible embodiment, the phase a path is cut out of the ac power supply system by:

and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, controlling a control signal of the thyristor switching switch on the phase A circuit to be started, and cutting the phase A circuit from the alternating current power supply system.

In a possible implementation manner, the compensation system includes a compensation main loop, and the compensation main loop includes a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; conducting the phase C path by:

when the alternating current power supply system needs to be compensated and the voltage of the thyristor switching switch on the C-phase circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the C-phase circuit is started, the inductance-capacitance group on the C-phase circuit is conducted with the connection in the alternating current power supply system, and the C-phase circuit is conducted.

In a possible implementation manner, the compensation system includes a compensation main loop, and the compensation main loop includes a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; cutting an A-phase path from the AC power supply system by:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase-A circuit crosses zero from negative to positive, the thyristor switching switch on the phase-A circuit is closed, the connection between the inductance-capacitance group on the phase-A circuit and the phase line in the alternating current power supply system is disconnected, and the phase-A circuit is cut off from the alternating current power supply system.

In a second aspect, an embodiment of the present application further provides a control device of a thyristor switching switch, where a compensation system is connected to an ac power supply system through the thyristor switching switch, and the compensation system is switched into the ac power supply system or switched off from the ac power supply system by switching on and off the thyristor switching switch; the control device includes:

the path conduction module is used for controlling the switching on of a control signal of a thyristor switching switch on the C-phase path when the AC power supply system needs to be compensated so as to conduct the C-phase path;

the system input module is used for controlling the control signal of the thyristor switching switch on the phase A circuit to be turned on to conduct the phase A circuit when the phase of the thyristor switching switch on the phase C circuit reaches 120 degrees after the voltage of the thyristor switching switch on the phase C circuit crosses zero; and when the C-phase path, the A-phase path and the B-phase path are all conducted, determining that the compensation system is put into the alternating current power supply system.

In a third aspect, an embodiment of the present application further provides an electronic device, including: the control method comprises a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, when an electronic device runs, the processor and the storage medium communicate through the bus, and the processor executes the machine-readable instructions to execute the steps of the control method of the thyristor switch according to any one of the first aspect.

In a fourth aspect, the present application further provides a computer-readable storage medium, where a computer program is stored, and the computer program is executed by a processor to perform the steps of the method for controlling a thyristor switch according to any one of the first aspect.

According to the control method and device for the thyristor switching switch, the electronic equipment and the storage medium, when the fact that the alternating current power supply system needs to be compensated is determined, the control signal of the thyristor switching switch on the C-phase channel is controlled to be started to conduct the C-phase channel; when the phase reaches 120 degrees after the voltage of the thyristor switching switch on the phase C circuit crosses zero, the control signal of the thyristor switching switch on the phase A circuit is controlled to be started so as to conduct the phase A circuit; and when the C-phase passage, the A-phase passage and the B-phase passage are all conducted, determining that the compensation system is put into an alternating current power supply system. In the embodiment of the application, when the compensation system is put into use, the putting sequence of the thyristor switching switches on the phase C path and the phase A path is controlled, so that the paths corresponding to the thyristor switching switches of all phases can be ensured to be put into use, the accuracy of putting control over the thyristor switching switches is improved, and the compensation system can be further ensured to be quickly put into an alternating current power supply system.

Furthermore, in the embodiment of the application, when the compensation system is cut off from the alternating current power supply system, the cutting-off sequence of the thyristor switching switches on the phase-C circuit and the phase-A circuit can be controlled, so that the cutting-off control accuracy of the thyristor switching switches is improved, and the compensation system can be further ensured to be cut off from the alternating current power supply system quickly.

Furthermore, because the switching sequence of the thyristor switching switches on the phase C path and the phase A path is controlled, the voltage values at two ends of the thyristor switching switches can be effectively reduced, and the service life of the thyristor switching switches is prolonged.

In order to make the aforementioned objects, features and advantages of the present application comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a flowchart of a method for controlling a thyristor fling-cut switch according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram illustrating a connection between an ac power supply system and a compensation system according to an embodiment of the present application;

fig. 3 is a schematic connection diagram of a corner interconnection method of a thyristor according to an embodiment of the present application;

fig. 4 is a schematic connection diagram of a thyristor corner external connection method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a control device of a thyristor fling-cut switch according to an embodiment of the present application;

fig. 6 is a second schematic structural diagram of a control device of a thyristor fling-cut switch according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. Every other embodiment that can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present application falls within the protection scope of the present application.

First, an application scenario to which the present application is applicable will be described. The method and the device can be applied to the technical field of electronic power.

Power electronics are increasingly used in ac power supply systems, and the use of these devices generates a large amount of reactive power and harmonics. The compensation system can compensate the reactive power and the harmonic waves in the alternating current power supply system; for the load with fast change and frequent start and stop of the alternating current power supply system, a switching switch with fast zero crossing needs to be adopted for dynamic reactive power compensation, wherein the thyristor switching switch is the switching switch with high utilization rate and fast zero crossing.

In the prior art, when a thyristor switching switch is controlled to be switched on, a zero crossing point can be detected through a zero crossing detection optocoupler MOC3083, and when the thyristor switching switch is switched off, zero current switching-off is realized through the characteristic of natural switching-off of the thyristor current zero crossing point.

However, in the compensation process, the phases of the current and the voltage on the capacitor in the compensation system are orthogonal in advance, and residual voltage may exist on the capacitor at the moment of switching off the thyristor switching switch, which may cause that the charging voltage of some phase capacitors may be greater than the peak value of the line voltage (for example, when an angle external switching mode is adopted, the polarity and the magnitude of the charging voltage of each phase of the angle capacitor are different, and the charging voltage of each phase caused by different switching phase sequences (for example, switching according to the sequence of the phase a, the phase B and the phase C and switching according to the sequence of the phase B, the phase C and the phase a) is different, and the charging voltage of some phase capacitors may be greater than the peak value of the line voltage), so that the thyristor cannot be turned on any more, thereby affecting the rapid switching of the compensation system into the ac power supply system for compensation.

Based on this, the embodiment of the application provides a control method for thyristor switching switches, which ensures that all paths corresponding to each phase of thyristor switching switches can be put into use, so as to improve the accuracy of putting into control of the thyristor switching switches, and further ensures that a compensation system can be quickly put into an alternating-current power supply system.

Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling a thyristor switch according to an embodiment of the present disclosure. As shown in fig. 1, a method for controlling a thyristor switch provided in an embodiment of the present application includes:

s101, when the alternating current power supply system needs to be compensated, controlling a control signal of a thyristor switching switch on a C-phase channel to be started so as to conduct the C-phase channel;

s102, when the phase of the thyristor switching switch on the phase C channel reaches 120 degrees after the voltage of the thyristor switching switch on the phase A channel crosses zero, controlling the control signal of the thyristor switching switch on the phase A channel to be started so as to conduct the phase A channel; and when the C-phase path, the A-phase path and the B-phase path are all conducted, determining that the compensation system is put into the alternating current power supply system.

According to the control method for the thyristor switching switches, when the compensation system is switched in, the switching sequences of the thyristor switching switches on the C-phase path and the A-phase path are controlled, and it is guaranteed that the paths corresponding to the thyristor switching switches of all phases can be switched in, so that the accuracy of switching control over the thyristor switching switches is improved, and the compensation system can be further guaranteed to be rapidly switched into an alternating-current power supply system.

The following describes exemplary steps of an embodiment of the present application:

in the embodiment of the application, the scheme of the application is applied to an alternating current power supply system and a thyristor switching switch connected with a compensation system, and the compensation system is switched into the alternating current power supply system or is cut off from the alternating current power supply system through the on-off of the thyristor switching switch.

Among these, power electronic devices are increasingly used in ac power supply systems, and the use of these devices generates a large amount of reactive power and harmonics, so that an external compensation system is required to compensate for the reactive power and the harmonics.

The working principle of the compensation system is as follows: the basic principle of the compensation of the gratuitous power is that a device with a capacitive power load and a device with an inductive power load are connected in parallel in the same circuit, and when the capacitive load releases energy, the inductive load absorbs the energy; when the inductive load releases energy, the capacitive load absorbs the energy, and the energy is exchanged between the two coincidences. In this way, the reactive power absorbed by the inductive load can be compensated by the reactive power output by the capacitive load.

In one possible embodiment, reactive compensation is compensated in the power distribution system mainly by both dynamic compensation and static compensation. Aiming at a power distribution system with a stable load, a mechanical contactor is adopted for switching in a compensation mode. However, because the response time of the contactor is relatively long, the demand of the compensation method for reactive power of fluctuating loads in the system and the timely response of the system power factor cannot be well met. Therefore, when a load which is changed quickly and is started and stopped frequently exists in the power distribution system, the dynamic reactive power compensation of the quick zero-crossing switching switch is mainly adopted. The load change is responded in time, the compensation effect is good, and therefore a technical mode of rapidly switching the compensation system through thyristor switching is provided.

Specifically, the thyristor has three connections: the thyristor is in a conducting state, the gate current is removed, strong positive feedback is formed in the thyristor, and the thyristor still can maintain the conducting state, so that the thyristor can be switched on and switched off through the zero-crossing condition of the thyristor, and the compensating system is put into an alternating current power supply system or is cut off from the alternating current power supply system.

In a possible implementation manner, the manner of determining that the ac power supply system needs to be compensated may be that a central processing module included in the ac power supply system sends out a compensation signal to prompt that the ac power supply system needs to be compensated; the method can also be used for detecting the reactive power and the harmonic wave generated by the alternating current power supply system in real time, and when at least one of the reactive power and the harmonic wave generated by the alternating current power supply system reaches a preset threshold value, the fact that the alternating current power supply system needs to be compensated is determined.

In a possible implementation manner, the alternating current power supply system is a three-phase voltage system, and the compensation system is respectively connected with each phase line of the alternating current power supply system through a thyristor switching switch; the three-phase voltage comprises an A-phase voltage, a B-phase voltage and a C-phase voltage;

A. the phase B and the phase C are defined by phase sequence, if any phase is taken as the phase B, the phase with the phase leading 2 pi/3 radian of the phase B is defined as the phase A, the phase with the phase lagging 2 pi/3 radian of the phase B is defined as the phase C, and if any phase is taken as the phase B, the phase with the phase lagging 2 pi/3 radian of the phase B is defined as the phase A, and the phase with the phase leading 2 pi/3 radian of the phase B is defined as the phase C.

In a possible implementation manner, please refer to fig. 2, fig. 2 is a schematic diagram illustrating a connection between an ac power supply system and a compensation system provided in an embodiment of the present application, and as shown in fig. 2, the compensation system 210 is connected to three phase lines of an ac power supply system 230 through thyristor switch 220, and different phase line paths in the compensation system are connected to or disconnected from the ac power supply system through the on/off of the thyristor switch on the synchronous phase line.

In the embodiment of the application, the three-phase paths are ensured to be all conducted by controlling the turn-on sequence of the control signals of the thyristor switching switch on the phase C path and the thyristor switching switch on the phase A path, and then the three-phase compensation system is simultaneously put into an alternating current power supply system.

Specifically, when it is determined that the alternating current power supply system needs to be compensated, a control signal of a thyristor switching switch on the phase-C circuit is controlled to be turned on so as to conduct the phase-C circuit; when the phase of the thyristor switching switch on the phase C circuit reaches 120 degrees after the voltage of the thyristor switching switch on the phase A circuit crosses zero, controlling a control signal of the thyristor switching switch on the phase A circuit to be started so as to conduct the phase A circuit; and when the C-phase passage, the A-phase passage and the B-phase passage are all conducted, determining that the compensation system is put into an alternating current power supply system.

In a possible embodiment, after the compensation system is controlled to be put into the ac power supply system, when it is determined that the compensation of the ac power supply system is finished, the compensation system needs to be cut off, and when the compensation system is cut off, different phase line paths need to be cut off from the ac power supply system according to certain attributes.

In a possible embodiment, also, the manner of determining the end of the compensation of the ac power supply system may be that a central processing module included in the ac power supply system sends out a compensation end signal to prompt the end of the compensation of the ac power supply system; the method can also be used for detecting the reactive power and the harmonic wave generated by the alternating current power supply system in real time, and when at least one of the reactive power and the harmonic wave generated by the alternating current power supply system reaches a preset threshold value, the compensation of the alternating current power supply system can be stopped.

Specifically, the control method further includes:

a1: when the AC power supply system is determined to be compensated, controlling a control signal of a thyristor switching switch on the phase A path to be started so as to cut the phase A path from the AC power supply system;

a2: when the phase reaches 240 degrees after the voltage of the thyristor switching switch on the phase-A circuit crosses zero, controlling the control signal of the thyristor switching switch on the phase-C circuit to be turned on so as to cut off the phase-C circuit from the alternating current power supply system; and when the C-phase path, the A-phase path and the B-phase path are all cut off from the alternating current power supply system, determining that the compensation system is cut off from the alternating current power supply system.

In one possible embodiment, the thyristor may be a forward access compensation system or a reverse access compensation system; meanwhile, whether the alternating current power supply system is in a positive phase sequence or a negative phase sequence is also considered, the positive electrode of the thyristor switching switch is connected with the phase line and the negative electrode of the thyristor switching switch is connected with the compensation system, the negative electrode of the thyristor switching switch is connected with the phase line and the positive electrode of the thyristor switching switch is connected with the compensation system, and the conduction principle of different phase line passages in the compensation system is explained according to different phase sequences of the thyristor switching-in and the alternating current power supply system respectively:

the first method comprises the following steps: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is connected into the compensation system in the forward direction), if the alternating current power supply system is in a positive phase sequence:

conducting the phase C channel by:

b1: when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase C circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the phase C circuit is started, and the phase C circuit is conducted.

In the embodiment of the application, when it is determined that the alternating-current power supply system needs to compensate, when the voltage of the thyristor switching switch on the phase-C circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the phase-C circuit is turned on, and the phase-C circuit is turned on.

Similarly, the phase a path is turned on by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the voltage of the thyristor switch in the phase-C circuit reaches 120 ° after zero crossing, and when the voltage of the thyristor switch in the phase-a circuit crosses zero from negative to positive, the control signal of the thyristor switch in the phase-a circuit is turned on, and the phase-a circuit is turned on.

And the second method comprises the following steps: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is reversely connected into the compensation system), if the alternating current power supply system is in positive phase sequence:

conducting the phase C channel by:

c1: when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase C circuit crosses zero point from positive direction to negative direction, the control signal of the thyristor switching switch on the phase C circuit is started, and the phase C circuit is conducted.

In the embodiment of the application, when it is determined that the alternating current power supply system needs to be compensated, when the voltage of the thyristor switching switch on the phase-C circuit crosses zero from positive to negative, the control signal of the thyristor switching switch on the phase-C circuit is turned on, and the phase-C circuit is turned on.

Similarly, the phase a path is turned on by:

in the embodiment of the application, when it is determined that the alternating-current power supply system needs to compensate, when the phase of the voltage of the thyristor switching switch on the phase-C circuit reaches 120 degrees after zero crossing, and when the voltage of the thyristor switching switch on the phase-a circuit crosses zero from positive to negative, the control signal of the thyristor switching switch on the phase-a circuit is turned on, and the phase-a circuit is conducted.

And the third is that: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is connected into the compensation system in the forward direction), if the alternating current power supply system is in the reverse phase sequence: conducting the A-phase path by:

conducting the A-phase path by:

when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the phase A circuit is started, and the phase A circuit is conducted.

Similarly, the C-phase channel is conducted through the following steps:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the voltage of the thyristor switch in the phase-a circuit reaches 120 ° after zero crossing, and when the voltage of the thyristor switch in the phase-C circuit crosses zero from negative to positive, the control signal of the thyristor switch in the phase-C circuit is turned on, and the phase-C circuit is turned on.

And a fourth step of: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is reversely connected into the compensation system), if the alternating current power supply system is in a reverse phase sequence:

conducting the A-phase path by:

when the alternating current power supply system is determined to need compensation, when the voltage of the thyristor switching switch on the phase A circuit crosses zero point from positive direction to negative direction, the control signal of the thyristor switching switch on the phase A circuit is started, and the phase A circuit is conducted.

Similarly, the C-phase channel is conducted through the following steps:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the voltage of the thyristor switch in the phase-a circuit reaches 120 ° after zero crossing, and when the voltage of the thyristor switch in the phase-C circuit crosses zero from positive to negative, the control signal of the thyristor switch in the phase-C circuit is turned on, and the phase-C circuit is turned on.

Similarly, when the compensation system is cut off, the turn-off condition of the thyristor also needs to be determined according to the phase sequence of the thyristor in different directions and the ac power supply system, and the principle of cutting off different phase line paths from the ac power supply system according to the phase sequence of the thyristor in different directions and the ac power supply system is as follows:

cutting off an A-phase path from the AC power supply system by:

d1: and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from positive to negative, the control signal of the thyristor switching switch on the phase A circuit is started, and the phase A circuit is cut off from the alternating current power supply system.

And when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from positive to negative, controlling a control signal of the thyristor switching switch on the phase A circuit to be started, and cutting off the phase A circuit from the alternating current power supply system.

Likewise, the C-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the voltage of the thyristor switch in the phase-a circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switch in the phase-C circuit crosses zero from positive to negative, the control signal of the thyristor switch in the phase-C circuit is controlled to be turned on, and the phase-C circuit is cut off from the ac power supply system.

cutting an A-phase path from the AC power supply system by:

e1: and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, controlling a control signal of the thyristor switching switch on the phase A circuit to be started, and cutting off the phase A circuit from the alternating current power supply system.

Likewise, the C-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the voltage of the thyristor switch in the phase-a circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switch in the phase-C circuit crosses zero from negative to positive, the control signal of the thyristor switch in the phase-C circuit is controlled to turn on, and the phase-C circuit is cut off from the ac power supply system.

And the third is that: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is connected into the compensation system in the forward direction), if the alternating current power supply system is in the reverse phase sequence:

cutting off a C-phase path from the AC power supply system by:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the C-phase circuit crosses zero from positive to negative, a control signal of the thyristor switching switch on the C-phase circuit is started, and the C-phase circuit is cut off from the alternating current power supply system.

Likewise, the a-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to be compensated, when the phase of the voltage of the thyristor switch in the phase-C circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switch in the phase-a circuit crosses zero from positive to negative, the control signal of the thyristor switch in the phase-a circuit is controlled to be turned on, and the phase-a circuit is cut off from the ac power supply system.

cutting off a C-phase path from the AC power supply system by:

and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase C circuit crosses zero from negative to positive, controlling a control signal of the thyristor switching switch on the phase C circuit to be started, and cutting off the phase C circuit from the alternating current power supply system.

Likewise, the a-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to be compensated, when the phase of the voltage of the thyristor switching switch in the phase-C circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switching switch in the phase-a circuit crosses zero from negative to positive, the control signal of the thyristor switching switch in the phase-a circuit is controlled to be turned on, and the phase-a circuit is cut off from the ac power supply system.

In one possible embodiment, the thyristor switch is connected with the angular inner control and the angular outer control in the main loop, the compensation system comprises a compensation main loop, and the compensation main loop comprises a plurality of inductance-capacitance groups; and each inductance-capacitance group is connected between different phase lines of the alternating current power supply system.

Specifically, referring to fig. 3, fig. 3 is a schematic connection diagram of the corner internal connection method of thyristors provided in the embodiment of the present application, as shown in fig. 3, a unit formed by connecting three groups of thyristors 310 and a single-phase capacitor 320 in series is connected in an angular manner between three phase lines, so as to form a "corner internal switching" topology; further, referring to fig. 4, fig. 4 is a connection schematic diagram of an angle external connection method of a thyristor according to an embodiment of the present application, and as shown in fig. 4, the thyristor is connected to an "angle external switching" topology between an angle capacitor and a phase line.

It is worth noting that the angle internal connection method and the angle external connection method have advantages and disadvantages respectively, and the angle internal connection method has the advantages that the current born by the thyristor is small, and the angle external connection method is adopted

The thyristor bears a voltage equal to the peak-peak value of the network voltage

Uab, the disadvantage is that only single phase capacitance can be selected. The angle external connection method has the advantages that the three-phase capacitor can be controlled by using two thyristor modules, and the defect that the thyristor bears large current and is in the angle internal connection method

The voltage born by the thyristor is larger than that born by the thyristor in the angle, and the control of the angle external connection method is more complicated than that of the angle internal connection method.

In a possible implementation mode, the two switching modes both adopt a soft switching working mode, namely, the thyristor is switched on at the moment that the positive voltage of the thyristor crosses zero from negative to positive so as to avoid inrush current; the thyristor is turned off at the instant when the thyristor current decreases from positive to zero to avoid operating overvoltages.

The first method comprises the following steps: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is positively connected into the compensation system), if the alternating current power supply system is in positive phase sequence:

conducting the phase C channel by:

f1: when the alternating current power supply system needs to be compensated and the voltage of the thyristor switching switch on the C-phase circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the C-phase circuit is started, the inductance-capacitance group on the C-phase circuit is conducted with the connection in the alternating current power supply system, and the C-phase circuit is conducted.

In this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the voltage of the thyristor switch in the phase C circuit crosses zero from negative to positive, the control signal of the thyristor switch in the phase C circuit is turned on, the inductance-capacitance group in the phase C circuit is connected and conducted with the ac power supply system, and the phase C circuit is conducted.

Similarly, the phase a path is turned on by:

in the embodiment of the application, when it is determined that the alternating-current power supply system needs to perform compensation, when the phase of the voltage of the thyristor switching switch on the phase-C circuit reaches 120 degrees after zero crossing, and the voltage of the thyristor switching switch on the phase-a circuit crosses zero from negative to positive, the control signal of the thyristor switching switch on the phase-a circuit is turned on, the inductance-capacitance group on the phase-a circuit is connected and conducted with the alternating-current power supply system, and the phase-a circuit is conducted.

in the embodiment of the application, when it is determined that the alternating current power supply system needs to be compensated, when the voltage of the thyristor fling-cut switch on the phase C path crosses zero from positive to negative, a control signal of the thyristor fling-cut switch on the phase C path is turned on, the inductance-capacitance group on the phase C path is connected and conducted with the alternating current power supply system, and the phase C path is conducted.

Similarly, the phase a path is turned on by:

in this embodiment of the application, when it is determined that the ac power supply system needs to be compensated, when the phase of the thyristor switching switch in the phase-C circuit reaches 120 ° after zero crossing, and when the voltage of the thyristor switching switch in the phase-a circuit crosses zero from positive to negative, the control signal of the thyristor switching switch in the phase-a circuit is turned on, the inductance-capacitance group in the phase-a circuit is connected to and conducted with the ac power supply system, and the phase-a circuit is conducted.

turning on the A-phase path by:

when the fact that the alternating current power supply system needs to be compensated is determined, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, a control signal of the thyristor switching switch on the phase A circuit is started, the inductance-capacitance group on the phase A circuit is communicated with the connection in the alternating current power supply system, and the phase A circuit is communicated.

Similarly, the C-phase channel is conducted through the following steps:

in this embodiment of the application, when it is determined that the ac power supply system needs to be compensated, when the phase of the voltage of the thyristor switch in the phase-a circuit reaches 120 ° after zero crossing and the voltage of the thyristor switch in the phase-C circuit crosses zero from negative to positive, the control signal of the thyristor switch in the phase-C circuit is turned on, the inductance-capacitance group in the phase-C circuit is connected to and conducted with the ac power supply system, and the phase-C circuit is conducted. And a fourth step of: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the negative direction of the thyristor is connected into the compensation system), if the alternating current power supply system is in a reverse phase sequence:

in the embodiment of the application, when the alternating current power supply system needs to be compensated, when the voltage of the thyristor switching switch on the phase a circuit crosses zero from positive to negative, the control signal of the thyristor switching switch on the phase a circuit is turned on, the inductance-capacitance group on the phase a circuit is connected and conducted with the alternating current power supply system, and the phase a circuit is conducted.

Similarly, the phase C channel is conducted through the following steps:

in this embodiment of the application, when it is determined that the ac power supply system needs to be compensated, when the phase of the thyristor switched switch in the phase-a circuit reaches 120 ° after the voltage zero-crossing, and when the voltage of the thyristor switched switch in the phase-C circuit crosses zero from positive to negative, the control signal of the thyristor switched switch in the phase-C circuit is turned on, the inductance-capacitance group in the phase-C circuit is connected to the ac power supply system, and the phase-C circuit is connected to the ac power supply system.

cutting off an A-phase path from the AC power supply system by:

g1: and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, the thyristor switching switch on the phase A circuit is closed, the connection between the inductance and capacitance group on the phase A circuit and the phase line in the alternating current power supply system is disconnected, and the phase A circuit is cut off from the alternating current power supply system.

And when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase-A circuit crosses zero point from positive to negative, the thyristor switching switch on the phase-A circuit is closed, the connection between the inductance-capacitance group on the phase-A circuit and the phase line in the alternating current power supply system is disconnected, and the phase-A circuit is cut off from the alternating current power supply system.

Likewise, the C-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the thyristor switched switch in the phase-a circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switched switch in the phase-C circuit crosses zero from positive to negative, the thyristor switched switch in the phase-C circuit is turned off, the connection between the inductance-capacitance group in the phase-C circuit and the phase line in the ac power supply system is disconnected, and the phase-C circuit is cut off from the ac power supply system.

and when the alternating current power supply system is determined to be compensated, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, the thyristor switching switch on the phase A circuit is closed, the connection between the inductance and capacitance group on the phase A circuit and the phase line in the alternating current power supply system is disconnected, and the phase A circuit is cut off from the alternating current power supply system.

Likewise, the C-phase path is cut out of the ac power supply system by:

in this embodiment, when it is determined that the ac power supply system needs to perform compensation, when the phase of the thyristor switch in the phase-a circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switch in the phase-C circuit crosses zero from negative to positive, the thyristor switch in the phase-C circuit is turned off, the connection between the inductance-capacitance group in the phase-C circuit and the phase line in the ac power supply system is disconnected, and the phase-C circuit is cut off from the ac power supply system.

And the third is that: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is reversely connected into the compensation system), if the alternating current power supply system is in a reverse phase sequence:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase C circuit crosses zero from positive to negative, the thyristor switching switch on the phase C circuit is closed, the connection between the inductance-capacitance group on the phase C circuit and the phase line in the alternating current power supply system is disconnected, and the phase C circuit is cut off from the alternating current power supply system.

Likewise, the a-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the thyristor switched switch in the phase-C circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switched switch in the phase-a circuit crosses zero from positive to negative, the thyristor switched switch in the phase-a circuit is turned off, the connection between the inductance-capacitance group in the phase-a circuit and the phase line in the ac power supply system is disconnected, and the phase-a circuit is cut off from the ac power supply system.

And fourthly: when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system (the thyristor is connected into the compensation system in the forward direction), if the alternating current power supply system is in the reverse phase sequence:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase C circuit crosses zero from negative to positive, the thyristor switching switch on the phase C circuit is closed, the connection between the inductance-capacitance group on the phase C circuit and the phase line in the alternating current power supply system is disconnected, and the phase C circuit is cut off from the alternating current power supply system.

Likewise, the a-phase path is cut out of the ac power supply system by:

in this embodiment of the application, when it is determined that the ac power supply system needs to perform compensation, when the phase of the thyristor switched switch in the phase-C circuit reaches 240 ° after zero crossing, and when the voltage of the thyristor switched switch in the phase-a circuit crosses zero from negative to positive, the thyristor switched switch in the phase-a circuit is turned off, the connection between the inductance-capacitance group in the phase-a circuit and the phase line in the ac power supply system is disconnected, and the phase-a circuit is cut off from the ac power supply system.

According to the control method of the thyristor switching switch, when the fact that the alternating current power supply system needs to be compensated is determined, the control signal of the thyristor switching switch on the C-phase circuit is controlled to be started to conduct the C-phase circuit; when the phase reaches 120 degrees after the voltage of the thyristor switching switch on the phase C circuit crosses zero, the control signal of the thyristor switching switch on the phase A circuit is controlled to be started so as to conduct the phase A circuit; and when the C-phase passage, the A-phase passage and the B-phase passage are all conducted, determining that the compensation system is put into an alternating current power supply system. In the embodiment of the application, when the compensation system is put into use, the putting sequence of the thyristor switching switches on the phase C path and the phase A path is controlled, so that the paths corresponding to the thyristor switching switches of all phases can be ensured to be put into use, the accuracy of putting control over the thyristor switching switches is improved, and the compensation system can be further ensured to be quickly put into an alternating current power supply system.

Furthermore, in the embodiment of the application, when the compensation system is removed from the alternating current power supply system, the removal sequence of the thyristor switching switches on the phase C circuit and the phase a circuit can be controlled, so that the accuracy of the removal control of the thyristor switching switches is improved, and the compensation system can be further ensured to be removed from the alternating current power supply system quickly.

Furthermore, as the switching sequence of the thyristor switching switches on the C-phase circuit and the A-phase circuit is controlled, the voltage values at two ends of the thyristor switching switches can be effectively reduced, and the service life of the thyristor switching switches is prolonged.

Based on the same inventive concept, the embodiment of the present application further provides a control device of a thyristor switch corresponding to the control method of the thyristor switch, and as the principle of solving the problem of the device in the embodiment of the present application is similar to the control method of the thyristor switch in the embodiment of the present application, the implementation of the device may refer to the implementation of the method, and repeated details are not repeated.

Referring to fig. 5 and fig. 6, fig. 5 is a first schematic structural diagram of a control device of a thyristor fling-cut switch provided in the embodiment of the present application, and fig. 6 is a second schematic structural diagram of the control device of the thyristor fling-cut switch provided in the embodiment of the present application. As shown in fig. 5, the control device 500 of the thyristor-switched switch includes:

a path conduction module 510, configured to control a control signal of a thyristor switching switch on a phase C path to turn on when it is determined that the ac power supply system needs to perform compensation, so as to conduct the phase C path;

the system input module 520 is used for controlling the control signal of the thyristor switching switch on the phase-A circuit to be turned on to conduct the phase-A circuit when the phase of the thyristor switching switch on the phase-C circuit reaches 120 degrees after the voltage of the thyristor switching switch on the phase-C circuit crosses zero; and when the C-phase path, the A-phase path and the B-phase path are all conducted, determining that the compensation system is put into the alternating current power supply system.

In one possible embodiment, the control device 500 of the thyristor-switched switch further includes a system cut-off module 530, and the system cut-off module 530 is configured to:

when the AC power supply system is determined to be compensated, controlling a control signal of a thyristor switching switch on the phase A path to be started so as to cut the phase A path from the AC power supply system;

In a possible embodiment, the ac power supply system is a three-phase voltage system, and the compensation system is connected to each phase line of the ac power supply system through a thyristor switching switch; when the anode of the thyristor switching switch is connected to the phase line and the cathode of the thyristor switching switch is connected to the compensation system, the path conducting module 510 is configured to conduct the phase C path through the following steps:

In a possible implementation, when the cathode of the thyristor-switched switch is connected to the phase line and the anode of the thyristor-switched switch is connected to the compensation system, the path-conduction module 510 is configured to conduct the C-phase path by:

In one possible embodiment, the system removal module 530 is configured to remove the a-phase path from the ac power supply system by:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase A circuit crosses zero point from positive to negative, a control signal of the thyristor switching switch on the phase A circuit is started, and the phase A circuit is cut off from the alternating current power supply system.

In one possible embodiment, the system removal module 530 is further configured to remove the a-phase path from the ac power supply system by:

In a possible implementation manner, the compensation system includes a compensation main loop, and the compensation main loop includes a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; the path conducting module 510 is configured to conduct the C-phase path by:

In a possible implementation manner, the compensation system includes a compensation main loop, and the compensation main loop includes a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; the system removal module 530 is further configured to remove the a-phase path from the ac power system by:

When the control device of the thyristor switching switch provided by the embodiment of the application determines that an alternating current power supply system needs to be compensated, the control device firstly controls the control signal of the thyristor switching switch on a C-phase circuit to be started so as to conduct the C-phase circuit; when the phase reaches 120 degrees after the voltage of the thyristor switching switch on the phase C circuit crosses zero, the control signal of the thyristor switching switch on the phase A circuit is controlled to be started so as to conduct the phase A circuit; and when the C-phase passage, the A-phase passage and the B-phase passage are all conducted, determining that the compensation system is put into an alternating current power supply system. In the embodiment of the application, when the compensation system is put into use, the putting sequence of the thyristor switching switches on the C-phase path and the A-phase path is controlled, and the paths corresponding to the thyristor switching switches of all phases can be guaranteed to be put into use, so that the accuracy of putting control over the thyristor switching switches is improved, and the compensation system can be further guaranteed to be quickly put into an alternating current power supply system.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. As shown in fig. 7, the electronic device 700 includes a processor 710, a memory 720, and a bus 730.

The memory 720 stores machine-readable instructions executable by the processor 710, when the electronic device 700 runs, the processor 710 communicates with the memory 720 through the bus 730, and when the machine-readable instructions are executed by the processor 710, the steps of the method for controlling a thyristor switching switch in the method embodiment shown in fig. 1 may be executed.

An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for controlling a thyristor switching switch in the method embodiment shown in fig. 1 may be executed.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in software functional units and sold or used as a stand-alone product, may be stored in a non-transitory computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the technical solutions, and the scope of the present application is not limited to the above-mentioned embodiments, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A control method of a thyristor switching switch is characterized in that a compensation system is connected with an alternating current power supply system through the thyristor switching switch, and the compensation system is switched into the alternating current power supply system or cut off from the alternating current power supply system through the on-off of the thyristor switching switch; the control method comprises the following steps:

2. The control method according to claim 1, characterized by further comprising:

3. The control method according to claim 2, wherein the alternating current power supply system is a three-phase voltage system, and the compensation system is respectively connected with each phase line of the alternating current power supply system through a thyristor switching switch; when the anode of the thyristor switching switch is connected with the phase line and the cathode of the thyristor switching switch is connected with the compensation system, the phase C circuit is conducted through the following steps:

4. The control method according to claim 3, wherein when the cathode of the thyristor-switched switch is connected to the phase line and the anode of the thyristor-switched switch is connected to the compensation system, the phase C path is turned on by:

5. The control method according to claim 3, characterized in that an A-phase path is cut out from the AC power supply system by:

6. The control method according to claim 4, characterized in that an A-phase path is cut out from the AC power supply system by:

and when the compensation of the alternating current power supply system is determined to be finished, when the voltage of the thyristor switching switch on the phase A circuit crosses zero from negative to positive, controlling a control signal of the thyristor switching switch on the phase A circuit to be started, and cutting off the phase A circuit from the alternating current power supply system.

7. The control method according to claim 3, wherein the compensation system comprises a compensation main loop, and the compensation main loop comprises a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; conducting the phase C path by:

8. The control method according to claim 5, wherein the compensation system comprises a compensation main loop, and the compensation main loop comprises a plurality of inductance-capacitance groups; each inductance-capacitance group is connected between different phase lines of the alternating current power supply system; cutting off an A-phase path from the AC power supply system by:

9. A control device of a thyristor switching switch is characterized in that a compensation system is connected with an alternating current power supply system through the thyristor switching switch, and the compensation system is switched into the alternating current power supply system or cut off from the alternating current power supply system through the on-off of the thyristor switching switch; the control device includes:

the circuit conduction module is used for controlling the starting of a control signal of a thyristor switching switch on a C-phase circuit when the AC power supply system needs to be compensated so as to conduct the C-phase circuit;

the system input module is used for controlling the control signal of the thyristor switching switch on the phase A circuit to be started to conduct the phase A circuit when the phase of the voltage of the thyristor switching switch on the phase C circuit reaches 120 degrees after zero crossing; and when the C-phase path, the A-phase path and the B-phase path are all conducted, determining that the compensation system is put into the alternating current power supply system.

10. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating with each other via the bus when the electronic device is running, the processor executing the machine-readable instructions to perform the steps of the method for controlling a thyristor-switched switch according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, performs the steps of the method of controlling a thyristor-switched switch according to any one of claims 1 to 8.