Load cutover method and device of alternating current contactor and storage medium

Abstract

The invention discloses a load cutover method and device of an alternating current contactor and a storage medium. The method can be applied to a load cutover circuit of the alternating current contactor, the load cutover circuit at least comprises a phase-change switch unit, and the method comprises the following steps: acquiring an initial working state of a power system where the alternating current contactor is located; determining an original phase line of the power system from three phase lines of the power system based on the initial working state; the phase-change switch unit is controlled, a loop in the load cutover circuit is conducted, the conduction state of the loop is obtained, and the conduction state is used for representing whether the loop is conducted or not; switching the original phase line to a target phase line based on the conduction state, and determining a load cutover result of the AC contactor by using the target phase line; based on the load cutover result, a target working state of the power system is determined, and the target working state is used for representing the condition that the power system is in three-phase load balance. According to the invention, the technical problem of low load cutover efficiency of the power distribution area is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of AC contactors, and in particular to a load cutover method, a load cutover device and a storage medium of an AC contactor. Background Art

[0002] In low-voltage distribution areas, there are many users and they are relatively scattered, which easily leads to unbalanced three-phase loads. At present, in order to solve the unbalanced three-phase loads, the load is usually cut off in the distribution area by manually disconnecting the wires, so as to achieve the purpose of evenly distributing the three-phase loads in the distribution area. However, the three-phase wires are often installed at high places, and disconnecting the wires requires climbing, which leads to the technical problem of low load cut-off efficiency in the distribution area.

[0003] Currently, no effective solution has been proposed to the technical problem of low load cutover efficiency in the above-mentioned distribution station area. Summary of the invention

[0004] The embodiments of the present invention provide a load cutover method, device and storage medium of an AC contactor, so as to at least solve the technical problem of low load cutover efficiency in a distribution station area.

[0005] According to one aspect of the embodiment of the invention, a load cutover method of an AC contactor is provided. The method can be applied to a load cutover circuit of an AC contactor, the load cutover circuit at least comprising a phase-changing switch unit, and the method comprises: obtaining an initial working state of a power system in which the AC contactor is located, wherein the initial working state is used to characterize the situation that there is a three-phase load imbalance in the power system; based on the initial working state, determining an original phase line of the power system from three phase lines of the power system, wherein the load of the original phase line is higher than the phase lines other than the original phase line among the three phase lines; controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain the conduction state of the loop, wherein the conduction state is used to characterize whether the loop is conducted; based on the conduction state, switching the original phase line to a target phase line, and determining the load cutover result of the AC contactor using the target phase line, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to characterize the successful cutover of the load of the power system; based on the load cutover result, determining a target working state of the power system, wherein the target working state is used to characterize the situation that the power system is in a three-phase load balance.

[0006] Optionally, based on the conduction state, the original phase line is switched to the target phase line, and the target phase line is used to determine the load cutover result of the AC contactor, including: in response to the conduction state being that the first circuit of the circuit is in a conducted state, and all other circuits in the circuit except the first circuit are in a non-conducting state, the original phase line is switched to the target phase line, and the load cutover result is obtained using the target phase line, wherein the first circuit is the circuit in which the target phase line is located.

[0007] Optionally, controlling the phase-changing switch unit to turn on the loop in the load cutover circuit to obtain the conduction state of the loop includes: controlling the phase-changing switch unit to start the self-locking function of the load cutover circuit to obtain a first start-up result of the load cutover circuit; based on the first start-up result, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0008] Optionally, controlling the phase-changing switch unit to start the self-locking function of the load cutover circuit to obtain a first start-up result of the load cutover circuit includes: obtaining a first operation instruction of a target relay in the phase-changing switch unit; in response to the first operation instruction, triggering a first target operation button corresponding to the target relay to determine a first start-up result, wherein the first start-up result is used to characterize that the self-locking function of the load cutover circuit has been turned on.

[0009] Optionally, based on the first opening result, the loop in the load cutover circuit is turned on to determine the conduction state of the loop, including: based on the first opening result, determining the pull-in state of the target relay in the phase-changing switch unit; based on the pull-in state, turning on the loop to obtain the conduction state of the loop.

[0010] Optionally, controlling the phase-changing switch unit to turn on the loop in the load cutover circuit to obtain the conduction state of the loop includes: controlling the phase-changing switch unit to start the interlocking function of the load cutover circuit to obtain a second start-up result of the load cutover circuit; based on the second start-up result, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0011] Optionally, controlling the phase-changing switch unit, starting the interlocking function of the load cutover circuit, and obtaining a second start result of the load cutover circuit, includes: obtaining a second operation instruction of the target AC contactor in the phase-changing switch unit; in response to the second operation instruction, triggering a second target operation button corresponding to the target AC contactor, and determining a second start result, wherein the second start result is used to characterize that the interlocking function of the load cutover circuit has been turned on.

[0012] Optionally, based on the second opening result, the loop in the load cutover circuit is turned on to determine the conduction state of the loop, including: based on the second opening result, determining the closed state of the target AC contactor in the phase-changing switch unit; based on the closed state, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0013] According to one aspect of an embodiment of the present invention, a load cutover device for an AC contactor is provided, which is applied to a load cutover circuit of the AC contactor, wherein the load cutover circuit at least includes a phase-changing switch unit, and the device further includes: an acquisition unit, which is used to acquire an initial working state of a power system in which the AC contactor is located, wherein the initial working state is used to characterize the situation that there is a three-phase load imbalance in the power system; a first determination unit, which is used to determine an original phase line of the power system from three phase lines of the power system based on the initial working state, wherein the load of the original phase line is higher than that of the phase lines other than the original phase line among the three phase lines; and a control unit, Used to control the phase-changing switch unit, turn on the loop in the load cutover circuit, and obtain the conduction state of the loop, wherein the conduction state is used to characterize whether the loop is turned on; the switching unit is used to switch the original phase line to the target phase line based on the conduction state, and use the target phase line to determine the load cutover result of the AC contactor, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to characterize the successful cutover of the load of the power system; the second determination unit is used to determine the target working state of the power system based on the load cutover result, wherein the target working state is used to characterize the situation that the power system is in a three-phase load balance.

[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the device where the storage medium is located is controlled to execute the method in the embodiment of the present invention.

[0015] According to another aspect of an embodiment of the present invention, a processor is provided. The processor is used to run a program, wherein the method in the embodiment of the present invention is executed when the program is run.

[0016] According to another aspect of the embodiments of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method in the embodiments of the present invention is implemented.

[0017] According to another aspect of an embodiment of the present invention, an electronic device is provided, the electronic device comprising a processor and a memory for storing instructions executable by the processor, wherein the processor is configured to execute the instructions to implement the method in the embodiment of the present invention.

[0018] In an embodiment of the present invention, an initial working state of an electric power system in which an AC contactor is located is obtained, wherein the initial working state is used to characterize a situation in which a three-phase load imbalance exists in the electric power system; based on the initial working state, an original phase line of the electric power system is determined from three phase lines of the electric power system, wherein the load of the original phase line is higher than the phase lines other than the original phase line among the three phase lines; a phase-changing switch unit is controlled to conduct a loop in a load cutover circuit to obtain a conduction state of the loop, wherein the conduction state is used to characterize whether the loop is conducted; based on the conduction state, the original phase line is switched to a target phase line, and a load cutover result of the AC contactor is determined using the target phase line, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to characterize a successful cutover of the load of the electric power system; based on the load cutover result, a target working state of the electric power system is determined, wherein the target working state is used to characterize a situation in which the electric power system is in a three-phase load balance. That is to say, the embodiment of the present invention can first obtain the initial working state of the power system in which the AC contactor is located, and then according to the initial working state obtained above, the original phase line of the power system can be determined from the three phase lines of the power system, and then the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit to obtain the conduction state of the loop. According to the conduction state of the loop at this time, the original phase line can be switched to the target phase line, and the target phase line can be used to achieve the purpose of determining the load cutover result of the AC contactor. Finally, according to the load cutover result obtained above, the target working state of the power system can be determined. Taking into account that after the original phase line of the power system is determined according to the initial working state of the power system, the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit, and then the conduction state of the loop at this time can be determined. Based on the conduction state obtained above, the original phase line is switched to the target phase line to obtain the load cutover result, so that the target working state of the power system can be determined, so that after the original phase line is switched to the target phase line, the distribution substation controlled by the power system can be converted from a situation where the three-phase load is unbalanced to a situation where the three-phase load is balanced in this distribution substation, so as to solve the technical problem of low load cutover efficiency in the distribution substation, and achieve the technical effect of improving the load cutover efficiency in the distribution substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a load cutover method of an AC contactor according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of a box in a load cutover circuit according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a phase-changing switch unit of a load cutover circuit according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of a load cutover device of an AC contactor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] According to an embodiment of the present invention, a load cutover method for an AC contactor is provided. It should be noted that in the flowchart of the accompanying drawings, the steps shown therein can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] The load cutover method of the AC contactor according to the embodiment of the present invention is introduced below.

[0028] Figure 1 The present invention is a flow chart of a load switching method of an AC contactor according to an embodiment of the present invention, the method is applied to a load switching circuit of an AC contactor, the load switching circuit at least includes a phase switching unit. The phase switching unit can be used to control the phase line connected in the power system to achieve the purpose of switching the phase line.

[0029] Optionally, the phase-changing switch unit uses three 160 ampere (A) AC contactors, one for each phase.

[0030] All contacts are conductive, and copper bars are used for input and output. The current-carrying size of the copper bars is equivalent to that of 70 square wires. There are three independent indicator lights, and the three independent indicator lights represent three phases, and there are three corresponding buttons and a main disconnect switch.

[0031] In this embodiment, the load cutover circuit may also include a box. Figure 2 is a schematic diagram of a box in a load cutover circuit according to an embodiment of the present invention, such as Figure 2 As shown, the size of the stainless steel double door is 600*500*250 mm, the inner door size is 430*375 mm, and the bottom plate size is 400*420 mm. The box is an outdoor stainless steel wall-mounted box with a lock on the door and no perspective window. The operation panel is visible after the door is opened.

[0032] In this embodiment, if Figure 1 As shown, the load cutover method of the AC contactor may include the following steps:

[0033] Step S101, obtaining the initial working state of the power system where the AC contactor is located.

[0034] In the technical solution provided in the above step S101 of the present invention, the initial working state of the power system in which the AC contactor is located can be obtained, wherein the initial working state is used to characterize the situation that the power system has a three-phase load imbalance. It should be noted that when the power system is in a three-phase load imbalance situation, the distribution substation controlled by the power system is also in a three-phase load imbalance situation.

[0035] Optionally, three-phase load imbalance refers to the imbalance of loads between phases in a three-phase circuit, that is, the currents of the three-phase lines are not equal. This situation may cause voltage fluctuations, power factor reduction, equipment overload and other problems in the circuit, affecting the stable operation of the power system.

[0036] For example, the initial working state of the AC contactor for characterizing the situation that the power system has a three-phase load imbalance can be obtained, which further indicates that the distribution station area controlled by the power system is also in a three-phase load imbalance situation.

[0037] Step S102: determining an original phase line of the power system from three phase lines of the power system based on the initial working state.

[0038] In the technical solution provided in the above step S102 of the present invention, after obtaining the initial working state of the power system, the purpose of determining the original phase line of the power system can be achieved from the three phase lines of the power system, wherein the load of the original phase line is higher than the phase lines other than the original phase line among the three phase lines, that is, the selected original phase line is the phase line with the highest load among the three phase lines.

[0039] For example, after obtaining the initial working state of the AC contactor used to characterize the situation where there is a three-phase load imbalance in the power system, the phase line with the highest load can be selected from the three phase lines of the power system as the original phase line, and then the original phase line can be processed in the next step, so that the distribution station area controlled by the power system can achieve the purpose of balanced three-phase load distribution.

[0040] It should be noted that this is only a preferred implementation method for determining the original phase line of the power system, and does not specifically limit the process and method for determining the original phase line of the power system. As long as the method and process for determining the original phase line of the power system from the three phase lines are based on the initial working state of the power system, they are within the protection scope of the present invention and are not listed here.

[0041] Step S103, controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain the conducting state of the loop.

[0042] In the technical solution provided in step S103 of the present invention, the phase-changing switch unit in the load cutover circuit can be controlled to turn on the loop in the load cutover circuit, so as to obtain the conduction state of the loop, wherein the conduction state is used to indicate whether the loop is turned on.

[0043] Optionally, each phase line in the load cutting circuit is provided with an AC contactor and an operation button, so that the operation button can be controlled to control the phase line corresponding to the operation button, so as to achieve the purpose of controlling the conduction state of the circuit in which the phase line is located.

[0044] Optionally, a phase-changing switch unit in the load cutover circuit is controlled to turn on one of the loops in the load cutover circuit, so that the conduction state of the loop can be obtained as being turned on.

[0045] For example, a phase-changing switch unit in the load cutover circuit is used to conduct a loop in the load cutover circuit, so that one loop in the load cutover circuit is in a conducting state.

[0046] It should be noted that this is only a preferred implementation method for obtaining the conduction state of the loop, and the process and method for obtaining the conduction state of the loop are not specifically limited. As long as the conduction of the loop in the load cutover circuit is controlled by using the phase-changing switch unit to achieve the purpose of determining the conduction state of the loop, it is within the protection scope of the present invention and will not be listed here.

[0047] Step S104: based on the conduction state, the original phase line is switched to the target phase line, and the load cutover result of the AC contactor is determined by using the target phase line.

[0048] In the technical solution provided in the above step S104 of the present invention, the original phase line can be switched to the target phase line according to the above-obtained conduction state of the loop, and the load cutover result of the AC contactor can be determined by using the target phase line.

[0049] Optionally, the load of the target phase line is lower than the load of the original phase line. The load cutover result is used to indicate that the load of the power system is successfully cutover.

[0050] For example, according to the conduction state of the obtained loop, the phase conductor with high load is reconnected to the phase conductor with low load, so that the load of the power system is finally successfully cut over, so that the distribution station area controlled by the power system can achieve the purpose of balanced distribution of three-phase load.

[0051] Step S105: determining a target operating state of the power system based on the load cutover result.

[0052] In the technical solution provided in the above step S105 of the present invention, after obtaining the load cutover result of the AC contactor, the target working state of the power system can be determined, wherein the target working state is used to represent the situation where the power system is in a three-phase load balance.

[0053] For example, after a single-phase conductor with a high load is reconnected to a single-phase conductor with a low load and the load of the power system is successfully cut over, the target working state of the power system at this time can be determined. That is to say, after a single-phase conductor with a high load is successfully reconnected to a single-phase conductor with a low load, the power system is converted from the original situation of unbalanced three-phase load to a situation where the three-phase load can be evenly distributed, thereby achieving balanced three-phase load distribution in the distribution station area controlled by the power system.

[0054] It should be noted that this is only a preferred implementation method for determining the target operating state of the power system, and does not specifically limit the process and method for determining the target operating state of the power system. As long as the process and method for determining the target operating state of the power system can be determined based on the load cutover result of the AC contactor, they are within the protection scope of the present invention and are not listed here.

[0055] In the above steps S101 to S105 of the present invention, the initial working state of the power system in which the AC contactor is located can be first obtained, and then according to the above-obtained initial working state, the original phase line of the power system can be determined from the three phase lines of the power system, and then the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit to obtain the conduction state of the loop. According to the conduction state of the loop at this time, the original phase line can be switched to the target phase line, and the target phase line can be used to achieve the purpose of determining the load cutover result of the AC contactor. Finally, according to the above-obtained load cutover result, the target working state of the power system can be determined. Taking into account that after the original phase line of the power system is determined according to the initial working state of the power system, the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit, and then the conduction state of the loop at this time can be determined. Based on the conduction state obtained above, the original phase line is switched to the target phase line to obtain the load cutover result, so that the target working state of the power system can be determined, so that after the original phase line is switched to the target phase line, the distribution substation controlled by the power system can be converted from a situation where the three-phase load is unbalanced to a situation where the three-phase load is balanced in this distribution substation, so as to solve the technical problem of low load cutover efficiency in the distribution substation, and achieve the technical effect of improving the load cutover efficiency in the distribution substation.

[0056] The above method of this embodiment is further introduced below.

[0057] As an optional implementation method, based on the conduction state, the original phase line is switched to the target phase line, and the target phase line is used to determine the load cutover result of the AC contactor, including: in response to the conduction state being that the first circuit of the circuit is in a conducted state, and all other circuits in the circuit except the first circuit are in a non-conducting state, the original phase line is switched to the target phase line, and the load cutover result is obtained using the target phase line, wherein the first circuit is the circuit where the target phase line is located.

[0058] In this embodiment, after obtaining the conduction state of the circuit, if the conduction state is that the first circuit of the circuit is in a conducted state, and the other circuits in the circuit except the first circuit are in a non-conducting state, the original phase line can be switched to the target phase line, thereby achieving the purpose of determining the load cutover result of the AC contactor.

[0059] For example, after obtaining the conduction state of the loop, it is determined that the conduction state of the loop where the target phase line is located is a conducted state, and the conduction states of the loops where the other two phase lines are located are not conducted states. That is to say, when one phase line is conducted, the other two phase lines are disconnected, so that the original phase line can be switched to the target phase line, so that the load of the power system can be successfully cutover.

[0060] As an optional implementation method, controlling the phase-changing switch unit to turn on the loop in the load cutover circuit to obtain the conduction state of the loop includes: controlling the phase-changing switch unit to start the self-locking function of the load cutover circuit to obtain a first start-up result of the load cutover circuit; based on the first start-up result, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0061] In this embodiment, the phase-changing switch unit can be controlled to start the self-locking function of the load cutover circuit and obtain the first start-up result of the load cutover circuit. Then, according to the first start-up result obtained above, the loop in the load cutover circuit can be turned on, so that the conduction state of the loop can be determined.

[0062] Optionally, the self-locking function of the load cutover circuit is used to indicate that when a short circuit or overload occurs, the circuit will be automatically disconnected and locked, thereby avoiding dangerous situations such as damage to electrical equipment or fire.

[0063] For example, the phase-changing switch unit can be controlled to start the self-locking function of the load cutover circuit. When the self-locking function of the load cutover circuit is started, the first circuit where the target phase line in the circuit is located can be turned on, and other circuits except the first circuit can be turned off.

[0064] As an optional implementation method, controlling the phase-changing switch unit, starting the self-locking function of the load cutover circuit, and obtaining a first start-up result of the load cutover circuit include: obtaining a first operation instruction of a target relay in the phase-changing switch unit; in response to the first operation instruction, triggering a first target operation button corresponding to the target relay, and determining a first start-up result, wherein the first start-up result is used to characterize that the self-locking function of the load cutover circuit has been turned on.

[0065] In this embodiment, a first operation instruction of a target relay in the phase-changing switch unit may be obtained, and after executing the first operation instruction, a first target operation button corresponding to the target relay is triggered to achieve the purpose of determining a first opening result.

[0066] Optionally, the target relay may be an intermediate relay on the target phase line, which may be referred to as the target intermediate relay. The first target operation button may be a jog button, which may be referred to as the first operation button. The first operation instruction is used to instruct pressing the first target operation button.

[0067] For example, obtaining an instruction for representing pressing the first target operation button of the target relay in the phase-changing switch unit and then executing the instruction can trigger the first target operation button corresponding to the target relay at this time, thereby achieving the purpose of turning on the self-locking function of the load cutover circuit.

[0068] As an optional implementation method, based on the first start-up result, the loop in the load cutover circuit is turned on to determine the conduction state of the loop, including: based on the first start-up result, determining the pull-in state of the target relay in the phase-changing switch unit; based on the pull-in state, turning on the loop to obtain the conduction state of the loop.

[0069] In this embodiment, after obtaining the first opening result, the pull-in state of the target relay in the phase-changing switch unit can be determined, and then according to the pull-in state obtained above, the loop in the load cutover circuit is turned on to determine the conduction state of the loop. The pull-in state of the target relay is used to indicate that the target relay is in a normal working state.

[0070] Optionally, Figure 3 is a schematic diagram of a phase-changing switch unit of a load cutover circuit according to an embodiment of the present invention, such as Figure 3 As shown, the input is alternating current (AC), and is 3-phase 4-wire (eg, U, V, W, and N), 80 volts (V), and 50 hertz (HZ).

[0071] Alternatively, if Figure 3 As shown, the operation button SB0, the operation button SB1, the operation button SB2 and the operation button SB3 are all momentary buttons, and the normally open auxiliary contacts of the intermediate relay KA01, the intermediate relay KA02 and the intermediate relay KA03 are respectively connected in parallel to the corresponding operation buttons. At this time, the operation button corresponding to the phase of the target phase line is pressed, and the intermediate relay corresponding to the operation button always remains in the energized state, which further indicates that the phase line has been turned on.

[0072] As an optional implementation method, controlling the phase-changing switch unit to turn on the loop in the load cutover circuit to obtain the conduction state of the loop includes: controlling the phase-changing switch unit to start the interlocking function of the load cutover circuit to obtain a second start-up result of the load cutover circuit; based on the second start-up result, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0073] In this embodiment, the phase-changing switch unit can be controlled to start the interlocking function of the load cutover circuit and obtain the second start-up result of the load cutover circuit. Then, according to the second start-up result obtained above, the loop in the load cutover circuit can be turned on to determine the conduction state of the loop.

[0074] Optionally, the interlocking function of the load cutover circuit is used to indicate that the safe operation of the circuit and the safety of personnel can be ensured during the load cutover operation. The interlocking function can prevent erroneous operation or non-compliance with safety regulations during the load cutover operation, thereby ensuring the normal operation of the circuit and equipment.

[0075] For example, the phase-changing switch unit can be controlled to start the interlocking function of the load cutover circuit. When the interlocking function of the load cutover circuit is started, the first circuit where the target phase line in the circuit is located can be turned on, and other circuits except the first circuit can be turned off.

[0076] As an optional implementation method, controlling the phase-changing switch unit, starting the interlocking function of the load cutover circuit, and obtaining a second start result of the load cutover circuit, includes: obtaining a second operation instruction of the target AC contactor in the phase-changing switch unit; in response to the second operation instruction, triggering a second target operation button corresponding to the target AC contactor, and determining a second start result, wherein the second start result is used to indicate that the interlocking function of the load cutover circuit has been turned on.

[0077] In this embodiment, the second operation instruction of the target AC contactor in the phase-changing switch unit can be obtained, and then according to the second operation instruction obtained above, the second target operation button corresponding to the target AC contactor can be triggered, thereby achieving the purpose of determining the second opening result.

[0078] Optionally, the second operation instruction is used to instruct pressing a second target operation button. The target AC contactor may be an AC contactor on a target phase line, which may be referred to as a target contactor. The second target operation button may be a jog button, which may be referred to as a second operation button.

[0079] For example, obtaining an instruction for representing pressing the second target operation button of the target AC contactor in the phase-changing switch unit and then executing the instruction can trigger the second target operation button corresponding to the target AC contactor at this time, thereby achieving the purpose of starting the interlocking function of the load cutover circuit.

[0080] As an optional implementation method, based on the second opening result, the loop in the load cutover circuit is turned on to determine the conduction state of the loop, including: based on the second opening result, determining the closed state of the target AC contactor in the phase-changing switch unit; based on the closed state, turning on the loop in the load cutover circuit to determine the conduction state of the loop.

[0081] In this embodiment, after obtaining the second opening result, the closed state of the target AC contactor in the phase-changing switch unit can be determined, and then according to the closed state obtained above, the loop in the load cutover circuit is turned on, so that the conduction state of the loop can be determined. The closed state of the target AC contactor is used to indicate that the target AC contactor is in a normal working state.

[0082] Alternatively, if Figure 3As shown, the output end of the operation button SB1 is connected to one end of the coil of contactor KM01, and is connected in series with the normally closed auxiliary contacts of contactor KM02 and contactor KM02; the output end of the operation button SB2 is connected to one end of the coil of contactor KM02, and is connected in series with the normally closed auxiliary contacts of contactor KM01 and contactor KM03; the output end of the operation button SB3 is connected to one end of the coil of contactor KM03, and is connected in series with the normally closed auxiliary contacts of contactor KM01 and contactor KM02.

[0083] Optionally, the contactors corresponding to the operation buttons cannot be closed at the same time. When one operation button is pressed, the contactors corresponding to other buttons will be disconnected, thereby realizing the interlocking function.

[0084] In this embodiment, the initial working state of the power system in which the AC contactor is located can be obtained first, and then based on the initial working state obtained above, the original phase line of the power system can be determined from the three phase lines of the power system, and then the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit to obtain the conduction state of the loop. According to the conduction state of the loop at this time, the original phase line can be switched to the target phase line, and the target phase line can be used to achieve the purpose of determining the load cutover result of the AC contactor. Finally, according to the load cutover result obtained above, the target working state of the power system can be determined. Taking into account that after the original phase line of the power system is determined according to the initial working state of the power system, the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit, and then the conduction state of the loop at this time can be determined. Based on the conduction state obtained above, the original phase line is switched to the target phase line to obtain the load cutover result, so that the target working state of the power system can be determined, so that after the original phase line is switched to the target phase line, the distribution substation controlled by the power system can be converted from a situation where the three-phase load is unbalanced to a situation where the three-phase load is balanced in this distribution substation, so as to solve the technical problem of low load cutover efficiency in the distribution substation, and achieve the technical effect of improving the load cutover efficiency in the distribution substation.

[0085] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0086] In low-voltage distribution areas, there are many users and they are scattered, which leads to the long-term existence of three-phase load imbalance. Among them, the three-phase load imbalance can easily cause the voltage of the distribution transformer to be unstable, and then the loss of the distribution transformer and the line will increase, thus affecting the economic benefits of the power supply company and the safe use of electricity by users, and even endangering the safety of people and equipment in serious cases.

[0087] At present, in response to the above-mentioned three-phase load imbalance, the method of manually disconnecting the wires is usually adopted to realize the load cutting of the distribution station area, so as to achieve the purpose of evenly distributing the three-phase load in the distribution station area. The process of manually disconnecting the 0.4 kilovolt (kV) wire is relatively complicated. The staff first disconnects the load switch of the transformer low-voltage output line to ensure that the line is not energized, and then disconnects the wire. The disconnection process of a single wire takes between 15 and 20 minutes, and the manpower and time costs are high. In addition, the three-phase wires are often installed at high places, and disconnecting the wires requires climbing operations, which leads to the technical problem of low load cutting efficiency in the distribution station area.

[0088] Therefore, in order to solve the above problems, the present invention proposes a load cutting method for an AC contactor, which can first obtain the initial working state of the power system in which the AC contactor is located, and then according to the initial working state obtained above, the original phase line of the power system can be determined from the three phase lines of the power system, and then the phase-changing switch unit can be controlled to turn on the loop in the load cutting circuit to obtain the conduction state of the loop. According to the conduction state of the loop at this time, the original phase line can be switched to the target phase line, and the target phase line can be used to achieve the purpose of determining the load cutting result of the AC contactor. Finally, according to the load cutting result obtained above, the target working state of the power system can be determined. Taking into account that after the original phase line of the power system is determined according to the initial working state of the power system, the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit, and then the conduction state of the loop at this time can be determined. Based on the conduction state obtained above, the original phase line is switched to the target phase line to obtain the load cutover result, so that the target working state of the power system can be determined, so that after the original phase line is switched to the target phase line, the distribution substation controlled by the power system can be converted from a situation where the three-phase load is unbalanced to a situation where the three-phase load is balanced in this distribution substation, so as to solve the technical problem of low load cutover efficiency in the distribution substation, and achieve the technical effect of improving the load cutover efficiency in the distribution substation.

[0089] In this embodiment, a load cutting circuit based on an AC contactor can be proposed, in which the input end is connected to a three-phase conductor, and the output end outputs a single-phase conductor. The opening and closing of the AC contactor is controlled by operating a button on the device, thereby controlling the change of the phase sequence of the output end conductor.

[0090] Optionally, the load cutover circuit may be composed of a box and a phase-changing switch unit, wherein the three switches in the phase-changing switch unit have a locking function, so that when one phase line is turned on, the other two phase lines are disconnected. The phase sequence of the conductors can be changed by manually operating a button.

[0091] Alternatively, if Figure 2As shown, the box is an outdoor stainless steel wall-mounted box with a locked door and no perspective window. The operation panel is visible after the door is opened.

[0092] Optionally, the phase-changing switch unit uses three 160A AC contactors, one for each phase, with all contacts turned on. Copper bars are used for both input and output, and the overcurrent size of the copper bar is equivalent to that of a 70 square wire. There are three independent indicator lights (for example, EL01, EL02, and EL03), and the three independent indicator lights represent three phases, and there are three corresponding buttons and a main disconnect switch.

[0093] Alternatively, if Figure 3 As shown, the operation button SB1, the operation button SB2 and the operation button SB3 are all momentary buttons, and the normally open auxiliary contacts of the intermediate relays KA01, KA02 and KA03 are respectively connected in parallel to the corresponding operation buttons. At this time, the operation button corresponding to the phase of the target phase line is pressed, and the intermediate relay corresponding to the operation button always remains in the energized state, which further indicates that the phase line has been turned on.

[0094] Optionally, the output end of the operation button SB1 is connected to one end of the coil of the contactor KM01, and is connected in series with the normally closed auxiliary contacts of the contactor KM02 and the contactor KM02; the output end of the operation button SB2 is connected to one end of the coil of the contactor KM02, and is connected in series with the normally closed auxiliary contacts of the contactor KM01 and the contactor KM03; the output end of the operation button SB3 is connected to one end of the coil of the contactor KM03, and is connected in series with the normally closed auxiliary contacts of the contactor KM01 and the contactor KM02. The contactors corresponding to the operation buttons cannot be closed at the same time. When one operation button is pressed, the contactors corresponding to the other buttons will be disconnected, thereby realizing the interlocking function.

[0095] In this embodiment, the initial working state of the power system in which the AC contactor is located can be obtained first, and then based on the initial working state obtained above, the original phase line of the power system can be determined from the three phase lines of the power system, and then the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit to obtain the conduction state of the loop. According to the conduction state of the loop at this time, the original phase line can be switched to the target phase line, and the target phase line can be used to achieve the purpose of determining the load cutover result of the AC contactor. Finally, according to the load cutover result obtained above, the target working state of the power system can be determined. Taking into account that after the original phase line of the power system is determined according to the initial working state of the power system, the phase-changing switch unit can be controlled to turn on the loop in the load cutover circuit, and then the conduction state of the loop at this time can be determined. Based on the conduction state obtained above, the original phase line is switched to the target phase line to obtain the load cutover result, so that the target working state of the power system can be determined, so that after the original phase line is switched to the target phase line, the distribution substation controlled by the power system can be converted from a situation where the three-phase load is unbalanced to a situation where the three-phase load is balanced in this distribution substation, so as to solve the technical problem of low load cutover efficiency in the distribution substation, and achieve the technical effect of improving the load cutover efficiency in the distribution substation.

[0096] According to an embodiment of the present invention, a load cutover device for an AC contactor is provided. It should be noted that the load cutover device for an AC contactor can be used to execute a load cutover method for an AC contactor in Embodiment 1.

[0097] Figure 4 Schematic diagram of a load cutover device of an AC contactor according to an embodiment of the present invention. The load cutover device of the AC contactor is applied to a load cutover circuit of the AC contactor. The load cutover circuit at least includes a phase-changing switch unit. Figure 4 As shown, a load cutover device 400 for an AC contactor may include: an acquisition unit 401 , a first determination unit 402 , a control unit 403 , a switching unit 404 and a second determination unit 405 .

[0098] The acquisition unit 401 is used to acquire the initial working state of the power system where the AC contactor is located, wherein the initial working state is used to indicate that there is a three-phase load imbalance in the power system.

[0099] The first determining unit 402 is configured to determine an original phase line of the power system from three phase lines of the power system based on an initial working state, wherein a load of the original phase line is higher than a load of phase lines other than the original phase line among the three phase lines.

[0100] The control unit 403 is used to control the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain the conduction state of the loop, wherein the conduction state is used to indicate whether the loop is conducted.

[0101] The switching unit 404 is used to switch the original phase line to the target phase line based on the conduction state, and use the target phase line to determine the load cutover result of the AC contactor, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to indicate that the load of the power system is successfully cutover.

[0102] The second determining unit 405 is used to determine a target operating state of the power system based on the load cutover result, wherein the target operating state is used to represent a situation where the power system is in a three-phase load balance.

[0103] Optionally, the switching unit 404 may include: a switching module, which is used to switch the original phase line to the target phase line in response to the first loop of the conduction state being in the conducted state, and the other loops in the loop except the first loop being in the non-conducting state, and obtain the load cutover result using the target phase line, wherein the first loop is the loop where the target phase line is located.

[0104] Optionally, the control unit 403 may include: a control module, used to control the phase-changing switch unit, start the self-locking function of the load cutover circuit, and obtain a first start-up result of the load cutover circuit; a determination module, used to turn on the loop in the load cutover circuit based on the first start-up result, and determine the conduction state of the loop.

[0105] Optionally, the control module may include: a first acquisition submodule, used to acquire a first operation instruction of a target relay in a phase-changing switch unit; a first determination submodule, used to trigger a first target operation button corresponding to the target relay in response to the first operation instruction, and determine a first start-up result, wherein the first start-up result is used to characterize that the self-locking function of the load cutover circuit has been turned on.

[0106] Optionally, the determination module may include: a second determination submodule, used to determine the energized state of the target relay in the phase-changing switch unit based on the first start-up result; and a second acquisition submodule, used to conduct the circuit based on the energized state to obtain the conduction state of the circuit.

[0107] Optionally, the control unit 403 may include: a starting module, used to control the phase-changing switch unit, start the interlocking function of the load cutover circuit, and obtain a second start-up result of the load cutover circuit; a conduction module, used to conduct the loop in the load cutover circuit based on the second start-up result, and determine the conduction state of the loop.

[0108] Optionally, the starting module may include: a third acquisition submodule, used to acquire a second operation instruction of a target AC contactor in the phase-changing switch unit; a third determination submodule, used to trigger a second target operation button corresponding to the target AC contactor in response to the second operation instruction, and determine a second start-up result, wherein the second start-up result is used to indicate that the interlocking function of the load cutover circuit has been turned on.

[0109] Optionally, the conduction module may include: a fourth determination submodule, used to determine the closing state of the target AC contactor in the phase-changing switch unit based on the second opening result; and a fifth determination submodule, used to conduct the loop in the load cutover circuit based on the closing state and determine the conduction state of the loop.

[0110] In this embodiment, the initial working state of the power system in which the AC contactor is located is obtained by the acquisition unit, wherein the initial working state is used to characterize the situation that there is a three-phase load imbalance in the power system; the original phase line of the power system is determined from the three phase lines of the power system by the first determination unit based on the initial working state, wherein the load of the original phase line is higher than the phase lines other than the original phase line among the three phase lines; the control unit controls the phase-changing switch unit to turn on the loop in the load cutover circuit to obtain the conduction state of the loop, wherein the conduction state is used to characterize whether the loop is turned on; the original phase line is switched to the target phase line based on the conduction state by the switching unit, and the load cutover result of the AC contactor is determined by using the target phase line, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to characterize the successful cutover of the load of the power system; the target working state of the power system is determined by the second determination unit based on the load cutover result, wherein the target working state is used to characterize the situation that the power system is in a three-phase load balance, so as to solve the technical problem of low load cutover efficiency in the distribution station area, and achieve the technical effect of improving the load cutover efficiency in the distribution station area.

[0111] According to an embodiment of the present invention, a computer-readable storage medium is also provided, which includes a stored program, wherein when the program is executed by a processor, the device where the readable storage medium is located is controlled to execute the load cutover method of the AC contactor in the embodiment.

[0112] Optionally, the storage medium is used to switch the original phase line to the target phase line based on the conduction state, and use the target phase line to determine the load cutover result of the AC contactor, including: in response to the conduction state being that the first circuit of the circuit is in a conducted state, and all other circuits in the circuit except the first circuit are in a non-conducting state, the original phase line is switched to the target phase line, and the load cutover result is obtained using the target phase line, wherein the first circuit is the circuit in which the target phase line is located.

[0113] Optionally, the storage medium is used to switch the original phase line to the target phase line based on the conduction state, and use the target phase line to determine the load cutover result of the AC contactor, including: in response to the conduction state being that the first circuit of the circuit is in a conducted state, and all other circuits in the circuit except the first circuit are in a non-conducting state, the original phase line is switched to the target phase line, and the load cutover result is obtained using the target phase line, wherein the first circuit is the circuit in which the target phase line is located.

[0114] Optionally, the storage medium is used to control the phase-changing switch unit, turn on the loop in the load cutover circuit, and obtain the conduction state of the loop, including: controlling the phase-changing switch unit, starting the self-locking function of the load cutover circuit, and obtaining a first start-up result of the load cutover circuit; based on the first start-up result, turn on the loop in the load cutover circuit and determine the conduction state of the loop.

[0115] Optionally, the storage medium is used to control the phase-changing switch unit, start the self-locking function of the load cutover circuit, and obtain a first start-up result of the load cutover circuit, including: obtaining a first operation instruction of a target relay in the phase-changing switch unit; in response to the first operation instruction, triggering a first target operation button corresponding to the target relay, and determining a first start-up result, wherein the first start-up result is used to characterize that the self-locking function of the load cutover circuit has been turned on.

[0116] Optionally, the storage medium is used to turn on the loop in the load cutover circuit based on the first turn-on result and determine the conduction state of the loop, including: determining the pull-in state of the target relay in the phase-changing switch unit based on the first turn-on result; turning on the loop based on the pull-in state to obtain the conduction state of the loop.

[0117] Optionally, the storage medium is used to control the phase-changing switch unit, turn on the loop in the load cutover circuit, and obtain the conduction state of the loop, including: controlling the phase-changing switch unit, starting the interlocking function of the load cutover circuit, and obtaining a second start-up result of the load cutover circuit; based on the second start-up result, turn on the loop in the load cutover circuit and determine the conduction state of the loop.

[0118] Optionally, the storage medium is used to control the phase-changing switch unit, start the interlocking function of the load cutover circuit, and obtain a second start-up result of the load cutover circuit, including: obtaining a second operation instruction of the target AC contactor in the phase-changing switch unit; in response to the second operation instruction, triggering a second target operation button corresponding to the target AC contactor, and determining a second start-up result, wherein the second start-up result is used to characterize that the interlocking function of the load cutover circuit has been turned on.

[0119] Optionally, the storage medium is used to turn on the loop in the load cutover circuit based on the second turn-on result and determine the conduction state of the loop, including: determining the closed state of the target AC contactor in the phase-changing switch unit based on the second turn-on result; and turning on the loop in the load cutover circuit based on the closed state to determine the conduction state of the loop.

[0120] According to an embodiment of the present invention, a processor is further provided. The processor is used to run a program. When the program is run, the load cutover method of the AC contactor in the embodiment is executed.

[0121] According to an embodiment of the present invention, a computer program product is further provided, including a computer program, and when the computer program is executed by a processor, the load cutover method of the AC contactor in the embodiment of the present invention is implemented.

[0122] According to an embodiment of the present invention, an electronic device is further provided, the electronic device comprising a processor and a memory for storing instructions executable by the processor, wherein the processor is configured to execute the instructions to implement the load cutover method of the AC contactor in the embodiment of the present invention.

[0123] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0124] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units can be a logical function division, and there can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0126] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0127] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0128] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0129] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A load cutover method for an AC contactor, characterized in that: A load cutover circuit applied to an AC contactor, the load cutover circuit comprising at least a phase-changing switch unit, including: Acquire an initial working state of the power system in which the AC contactor is located, wherein the initial working state is used to characterize a situation in which the power system has a three-phase load imbalance; Based on the initial working state, determining an original phase line of the power system from the three phase lines of the power system, wherein the load of the original phase line is higher than the load of the phase lines other than the original phase line among the three phase lines; Controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain a conduction state of the loop, wherein the conduction state is used to indicate whether the loop is conducted; Based on the conduction state, the original phase line is switched to a target phase line, and the load cutover result of the AC contactor is determined by using the target phase line, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to indicate that the load of the power system is successfully cutover; Based on the load cutover result, a target operating state of the power system is determined, wherein the target operating state is used to characterize that the power system is in a state of three-phase load balance.

2. The method according to claim 1, characterized in that Based on the conduction state, the original phase line is switched to a target phase line, and the load cutover result of the AC contactor is determined by using the target phase line, including: In response to the conduction state being that the first loop of the loop is in a conducted state, and the other loops in the loop except the first loop are in a non-conducting state, the original phase line is switched to a target phase line, and the load cutover result is obtained using the target phase line, wherein the first loop is the loop where the target phase line is located.

3. The method according to claim 1, characterized in that Controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain the conduction state of the loop includes: Controlling the phase-changing switch unit to start the self-locking function of the load cutover circuit to obtain a first opening result of the load cutover circuit; Based on the first start-up result, a loop in the load cutover circuit is turned on, and a conduction state of the loop is determined.

4. The method according to claim 3, characterized in that Controlling the phase-changing switch unit to start the self-locking function of the load cutover circuit to obtain a first opening result of the load cutover circuit includes: Acquire a first operation instruction of a target relay in the phase-changing switch unit; In response to the first operation instruction, a first target operation button corresponding to the target relay is triggered, and the first opening result is determined, wherein the first opening result is used to indicate that the self-locking function of the load cutover circuit has been turned on.

5. The method according to claim 3, characterized in that: Based on the first opening result, turning on a loop in the load cutover circuit and determining a conduction state of the loop includes: Based on the first opening result, determining the pull-in state of the target relay in the phase-changing switch unit; Based on the pull-in state, the circuit is turned on to obtain a conduction state of the circuit.

6. The method according to claim 1, characterized in that Controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain the conduction state of the loop includes: Controlling the phase-changing switch unit to start the interlocking function of the load cutover circuit to obtain a second start result of the load cutover circuit; Based on the second start-up result, a loop in the load cutover circuit is turned on, and a conduction state of the loop is determined.

7. The method according to claim 6, characterized in that Controlling the phase-changing switch unit to start the interlocking function of the load cutover circuit to obtain a second start result of the load cutover circuit includes: Obtaining a second operation instruction of a target AC contactor in the phase-changing switch unit; In response to the second operation instruction, a second target operation button corresponding to the target AC contactor is triggered to determine the second opening result, wherein the second opening result is used to indicate that the interlocking function of the load cutover circuit has been turned on.

8. The method according to claim 6, characterized in that Based on the second opening result, turning on a loop in the load cutover circuit and determining a conduction state of the loop includes: Based on the second opening result, determining a closing state of a target AC contactor in the phase-changing switch unit; Based on the closed state, a loop in the load cutover circuit is turned on, and a conduction state of the loop is determined.

9. A load cutover device for an AC contactor, characterized in that: A load cutover circuit applied to an AC contactor, the load cutover circuit comprising at least a phase-changing switch unit, including: An acquisition unit, used for acquiring an initial working state of the power system in which the AC contactor is located, wherein the initial working state is used for indicating that there is a three-phase load imbalance in the power system; A first determining unit is configured to determine, based on the initial working state, an original phase line of the power system from the three phase lines of the power system, wherein a load of the original phase line is higher than a load of a phase line other than the original phase line among the three phase lines; A control unit, used for controlling the phase-changing switch unit to conduct the loop in the load cutover circuit to obtain a conduction state of the loop, wherein the conduction state is used to indicate whether the loop is conducted; A switching unit, configured to switch the original phase line to a target phase line based on the conduction state, and determine a load cutover result of the AC contactor using the target phase line, wherein the load of the target phase line is lower than the load of the original phase line, and the load cutover result is used to indicate that the load of the power system is successfully cutover; The second determining unit is used to determine a target operating state of the power system based on the load cutover result, wherein the target operating state is used to represent that the power system is in a state of three-phase load balance.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the device where the storage medium is located is controlled to execute the method according to any one of claims 1 to 8.

Images