Protection method of low-voltage intelligent capacitance compensation device and readable storage medium

Abstract

The invention provides a protection method of a low-voltage intelligent capacitance compensation device and a readable storage medium. The protection method of the low-voltage intelligent capacitance compensation device comprises the steps of controlling a switching element of the low-voltage intelligent capacitance compensation device to execute a disconnection action under the condition that the low-voltage intelligent capacitance compensation device meets a first preset condition; acquiring a first voltage value corresponding to a static contact of the switching element and a second voltage value corresponding to a movable contact of the switching element; determining the current potential difference of the switching element according to the first voltage value and the second voltage value; under the condition that the current potential difference of the switching element is smaller than or equal to the preset potential difference, circularly executing the step of controlling the switching element to execute the disconnection action until the switching element meets a second preset condition; and controlling a shunt release of the low-voltage intelligent capacitance compensation device to act under the condition that the number of times that the switching element executes the disconnection action reaches a preset number of times, so that the low-voltage intelligent capacitance compensation device is separated from the power grid.

Description

Technical Field

[0001] The present application relates to the field of power control technology, and in particular to a protection method and a readable storage medium for a low-voltage intelligent capacitor compensation device. Background Art

[0002] Reactive power compensation is a key technology that improves the power factor of the power grid by reducing the loss of power transformers and transmission lines, improving power supply efficiency, and improving the power supply environment. In the power supply system, the low-voltage intelligent capacitor compensation device is an indispensable device for achieving reactive power compensation.

[0003] During the operation of the low-voltage intelligent capacitor compensation device, it is necessary to rely on the switching element (magnetic latching relay) in the low-voltage intelligent capacitor compensation device to control the connection and disconnection of the capacitor in the low-voltage intelligent capacitor compensation device. If a short-circuit fault occurs in the switching element, such as the moving contact of the normally open contact of the magnetic latching relay and its corresponding static contact are adhered, the low-voltage intelligent capacitor compensation device will not be able to disconnect from the power grid, which may cause reactive power overcompensation and reactive power reverse transmission, affecting the reliability of the low-voltage intelligent capacitor compensation device. Summary of the invention

[0004] The present application provides a protection method and a readable storage medium for a low-voltage intelligent capacitor compensation device to solve the problem in the prior art that the low-voltage intelligent capacitor compensation device cannot be disconnected from the power grid due to a short-circuit failure in a switching element, thereby affecting the reliability of the low-voltage intelligent capacitor compensation device.

[0005] In a first aspect, the present application provides a protection method for a low-voltage intelligent capacitor compensation device, comprising:

[0006] When the low-voltage intelligent capacitor compensation device meets the first preset condition, controlling the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action; wherein the disconnection action is used to put the switching element in a disconnected state;

[0007] Acquire a first voltage value corresponding to the stationary contact of the switching element, and a second voltage value corresponding to the moving contact of the switching element;

[0008] determining a current potential difference of the switching element according to the first voltage value and the second voltage value;

[0009] In the case where the current potential difference of the switching element is less than or equal to the preset potential difference, the above steps of controlling the switching element to perform the disconnection action are cyclically performed until the switching element meets a second preset condition; wherein the second preset condition is that the current potential difference of the switching element is greater than the preset potential difference, or the number of times the switching element performs the disconnection action reaches a preset number; the preset potential difference is a dividing value for distinguishing between connection and disconnection of the switching element;

[0010] When the number of disconnection actions performed by the switching element reaches a preset number, the shunt release of the low-voltage intelligent capacitor compensation device is controlled to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid.

[0011] In a possible design, the low-voltage intelligent capacitor compensation device includes a box, and the switching element and the shunt release are both installed in the box;

[0012] The first preset condition is that the current pressure in the box is equal to the preset pressure; wherein the preset pressure is a dividing value for distinguishing whether the box explodes.

[0013] In a possible design, when the low-voltage intelligent capacitor compensation device meets the first preset condition, controlling the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action includes:

[0014] Receive a first signal sent by a detection module; wherein the first signal is used to indicate that the current pressure in the box is equal to the preset pressure;

[0015] Based on the first signal, the switching element of the low-voltage intelligent capacitor compensation device is controlled to perform a disconnection action.

[0016] In a possible design, the detection module is a micro switch, and the first signal is a high-level signal.

[0017] In a possible design, when the current potential difference of the switching element is less than or equal to the preset potential difference, the step of controlling the switching element to perform the disconnection action is cyclically performed until the current potential difference of the switching element is not the preset potential difference, and the method further includes:

[0018] A first alarm signal is output, and the switching element is controlled to remain in an off state.

[0019] In one possible design, the first preset condition is at least one of an overvoltage protection condition, an undervoltage protection condition, a three-phase unbalance protection condition, a power-on protection condition, and a power-off protection condition.

[0020] In a possible design, when the current potential difference of the switching element is less than or equal to the preset potential difference, the step of controlling the switching element to perform the disconnection action is cyclically performed until the current potential difference of the switching element is not the preset potential difference, and the method further includes:

[0021] A second alarm signal is outputted, and when the low-voltage intelligent capacitor compensation device meets normal working conditions, the switching element is controlled to perform a closing action; wherein the closing action is used to put the switching element in a closed state.

[0022] In a possible design, when the number of disconnection actions performed by the switching element reaches a preset number, controlling the shunt release of the low-voltage intelligent capacitor compensation device to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid, including:

[0023] When the number of times the switching element performs the disconnection action reaches a preset number, sending a first message to a target device so that the target device outputs target prompt information based on the first message; wherein the target prompt information is used to indicate a fault of the switching element;

[0024] The shunt release of the low-voltage intelligent capacitor compensation device is controlled to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid.

[0025] In a second aspect, the present application provides an electronic device, characterized in that it includes: a memory and at least one processor;

[0026] The memory stores computer-executable instructions;

[0027] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method described in the first aspect or various possible designs of the first aspect.

[0028] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed, the method described in the first aspect or various possible designs of the first aspect are implemented.

[0029] The protection method of the low-voltage intelligent capacitor compensation device provided in the embodiment of the present application, first, when the low-voltage intelligent capacitor compensation device meets the first preset condition, the switching element of the low-voltage intelligent capacitor compensation device is controlled to perform a disconnection action, and the current potential difference between the moving contact and the static contact of the switching element is monitored in real time; secondly, the current potential difference of the switching element is compared with the preset potential difference, and when the current potential difference is less than or equal to the preset potential difference, the switching element is cyclically controlled to perform the disconnection action until the current potential difference of the switching element is greater than the preset potential difference, or until the number of times the switching element performs the disconnection action reaches a preset number; wherein, when the current potential difference of the switching element is greater than the preset potential difference, the switching element is disconnected for a predetermined number of times. When the potential difference is set, it means that the moving contact and the static contact of the switching element have been separated, the switching element is in a disconnected state, and the low-voltage intelligent capacitor compensation device no longer performs reactive power compensation for the power grid; finally, when the number of disconnection actions performed by the switching element reaches a preset number of times and the current potential difference of the switching element is still less than or equal to the preset potential difference, the low-voltage intelligent capacitor compensation device is forced to be disconnected from the power grid through the shunt release, so as to prevent the low-voltage intelligent capacitor compensation device from continuing to perform reactive power compensation for the power grid, avoid reactive power overcompensation and reactive power reverse transmission, and at the same time, avoid the power factor of the power grid being too low, resulting in an increase in line loss in the power supply circuit, further improving the reliability and service life of the low-voltage intelligent capacitor compensation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flow chart of a protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application;

[0031] Figure 2 A flow chart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application;

[0032] Figure 3 A schematic flow chart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a protection device for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B can exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0040] In the description of this application, unless otherwise specified, "multiple" and "at least two" mean more than two (including two). Similarly, "multiple groups" and "at least two groups" mean more than two groups (including two).

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, "connected" or "connection" can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In order to make those skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings. It should be noted that different technical features in the present application can be combined with each other without conflict.

[0043] First, the terms involved in one or more embodiments of this specification are explained.

[0044] Low-voltage intelligent capacitor compensation device, a device used to improve the power factor of the power system; by automatically monitoring and adjusting the reactive power demand in the system, optimizing the power quality and reducing power loss. The low-voltage intelligent capacitor compensation device reduces the reactive power of the power system through capacitor compensation current, improves the power factor, and makes the power system run more efficiently.

[0045] The low voltage intelligent capacitor compensation device comprises a magnetic latching relay and a circuit breaker.

[0046] Magnetic latching relays are mainly used to control the connection and disconnection of capacitors in low-voltage intelligent capacitor compensation devices. Unlike traditional relays, magnetic latching relays have the advantages of energy saving and high stability, and are particularly suitable for the intelligent needs of capacitor compensation devices. After the magnetic latching relay completes the opening and closing operation at the moment of power-on, it can maintain the state without continuous power supply, which significantly reduces the energy consumption and is particularly suitable for intelligent compensation devices that require high efficiency and energy saving; the magnetic latching relay has a stable structure and strong anti-electromagnetic interference ability. It can maintain stable performance even in a strong electromagnetic environment, reduce the impact on the capacitor compensation device, and extend the service life of the capacitor compensation device; the magnetic latching relay can realize the precise switching of the capacitor according to the controller instructions, ensure that the power factor of the power system is adjusted to the optimal state in real time, and help reduce energy loss.

[0047] The circuit breaker includes a shunt release, which is mainly used for remote control and overload protection. When the low-voltage intelligent capacitor compensation device fails or needs to be manually disconnected, the shunt release can immediately cut off the circuit to ensure the safety of the low-voltage intelligent capacitor compensation device and the power grid.

[0048] Next, some specific embodiments and drawings are used to describe in detail how the present application solves the above-mentioned problem that the low-voltage intelligent capacitor compensation device cannot be disconnected from the power grid due to a short-circuit failure in the switching element, thereby affecting the reliability of the low-voltage intelligent capacitor compensation device.

[0049] Figure 1 A flow chart of a protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application. Figure 1 As shown, the protection method of the low-voltage intelligent capacitor compensation device provided in the embodiment of the present application specifically includes S101 to S105, and S101 to S105 are described in detail below.

[0050] It should be noted that the execution subject of the protection method of the low-voltage intelligent capacitor compensation device provided in the embodiment of the present application can be a microprocessor in the low-voltage intelligent capacitor compensation device.

[0051] S101. When the low-voltage intelligent capacitor compensation device meets a first preset condition, the microprocessor controls a switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action.

[0052] The disconnection action is used to put the switching element in a disconnected state.

[0053] It should be noted that the switching elements in the low-voltage intelligent capacitor compensation device are divided into two types: common compensation switches and separate compensation switches. The common compensation switch is used to switch the three-phase capacitor, using the △ connection method; the separate compensation switch is used to switch the split-phase capacitor, using the Y connection method. Regardless of the △ connection method or the Y connection method, the types of switching elements in the low-voltage intelligent capacitor compensation device are divided into three categories: the first category, semiconductor electronic switches (such as thyristors); the second category, compound switches (magnetic latching relays plus thyristors); the third category, synchronous switches (microprocessor-controlled magnetic latching relays).

[0054] In this embodiment, the type of the switching element is a synchronous switch, that is, the switching element is a magnetic latching relay controlled by a microprocessor.

[0055] When the magnetic latching relay does not fail, the microprocessor can put the magnetic latching relay in an open state by controlling the magnetic latching relay to perform an opening action; the microprocessor can put the magnetic latching relay in a closed state by controlling the magnetic latching relay to perform a closing action.

[0056] Among them, the first preset condition is a prerequisite for triggering the low-voltage intelligent capacitor compensation device to perform a protection action (disconnection action).

[0057] It should be noted that during the operation of the low-voltage intelligent capacitor compensation device, the microprocessor of the low-voltage intelligent capacitor compensation device monitors the operating status of the low-voltage intelligent capacitor compensation device in real time. When the low-voltage intelligent capacitor compensation device meets the first preset condition, the microprocessor sends a disconnection instruction to the magnetic holding relay of the low-voltage intelligent capacitor compensation device to control the magnetic holding relay to perform the disconnection action.

[0058] In this embodiment, a microprocessor is used to determine whether the low-voltage intelligent capacitor compensation device meets the first preset condition, and when the low-voltage intelligent capacitor compensation device meets the first preset condition, the magnetic holding relay of the low-voltage intelligent capacitor compensation device is controlled to perform a disconnection action, so as to timely cut off the reactive compensation when an abnormal situation occurs in the low-voltage intelligent capacitor compensation device, avoid unnecessary over-compensation or avoid potential damage to the power grid and the low-voltage intelligent capacitor compensation device, and improve the reliability of the low-voltage intelligent capacitor compensation device.

[0059] S102: The microprocessor obtains a first voltage value corresponding to a stationary contact of a switching element and a second voltage value corresponding to a moving contact of the switching element.

[0060] Among them, the moving contact of the switching element refers to the contact in the magnetic holding relay that can move and change position when the power is turned on or off; the static contact of the switching element refers to the fixed contact in the magnetic holding relay that does not move, and is usually in contact or disconnection with the moving contact to achieve closing or opening.

[0061] It should be noted that when the moving contact of the normally open contact of the magnetic latching relay and its corresponding static contact are stuck, the microprocessor controlling the magnetic latching relay to perform the disconnection action cannot separate the moving contact from the static contact of the magnetic latching relay, thereby causing the magnetic latching relay to remain in a closed state and the magnetic latching relay cannot be disconnected normally.

[0062] The first voltage value corresponds to the voltage of the stationary contact of the switching element, and the second voltage value corresponds to the voltage of the moving contact of the switching element.

[0063] It should be noted that in the prior art, during the operation of the low-voltage intelligent capacitor compensation device, the microprocessor needs to obtain the first voltage value and the second voltage value in real time to perform fault warning and diagnosis, operation data recording and analysis, energy consumption monitoring and energy-saving control, etc. of the low-voltage intelligent capacitor compensation device.

[0064] The method for the microprocessor to obtain the first voltage value and the second voltage value is an existing method, which will not be described in detail in this embodiment.

[0065] In this embodiment, by acquiring the first voltage value and the second voltage value of the magnetic latching relay in real time through the microprocessor, the connection status of the static contact and the moving contact of the magnetic latching relay can be accurately determined, and potential abnormal conditions such as contact adhesion or incomplete disconnection can be discovered in time, thereby improving the reliability and safety of the disconnection action of the magnetic latching relay and significantly enhancing the stability of the low-voltage intelligent capacitor compensation device.

[0066] S103: The microprocessor determines the current potential difference of the switching element according to the first voltage value and the second voltage value.

[0067] It should be noted that the current potential difference of the magnetic latching relay is the difference between the first voltage value and the second voltage value of the magnetic latching relay.

[0068] In this embodiment, by calculating the potential difference between the static contact and the moving contact of the magnetic latching relay, fault conditions such as contact adhesion or incomplete disconnection of the magnetic latching relay can be quickly and accurately identified.

[0069] S104: When the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor cyclically executes the above steps of controlling the switching element to perform a disconnection action until the switching element meets a second preset condition.

[0070] Figure 2 A flow chart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application. Figure 2 As shown, after the microprocessor determines the current potential difference of the magnetic latching relay in S103, the microprocessor executes step a, which is described in detail below.

[0071] Step a: The microprocessor determines whether the current potential difference of the switching element is less than or equal to the preset potential difference.

[0072] It should be noted that when the current potential difference of the magnetic holding relay is less than or equal to the preset potential difference, the microprocessor executes S104; when the current potential difference of the magnetic holding relay is greater than the preset potential difference, it means that the static contact and the moving contact of the magnetic holding relay are disconnected, and the microprocessor executes step b or step c.

[0073] The preset potential difference is a dividing value for distinguishing whether the switching element is connected or disconnected.

[0074] It should be noted that in an actual circuit, even if the static contact and the moving contact of the magnetic latching relay are disconnected, there may be a small residual voltage, so the preset potential difference approaches zero.

[0075] For example, the preset potential difference is 0.05V.

[0076] When the current potential difference of the magnetic holding relay is less than or equal to the preset potential difference, it indicates that the static contact and the moving contact of the magnetic holding relay are stuck. Therefore, the microprocessor executes S104 to control the magnetic holding relay to cyclically perform the disconnection action and try to separate the static contact and the moving contact of the magnetic holding relay.

[0077] The second preset condition is that the current potential difference of the switching element is greater than the preset potential difference, or the number of times the switching element performs the disconnection action reaches a preset number.

[0078] It should be noted that when the current potential difference of the magnetic latching relay is greater than the preset potential difference, it means that the static contact and the moving contact of the magnetic latching relay are separated, the magnetic latching relay is in the disconnected state, and the microprocessor executes step b or step c.

[0079] If the current potential difference of the magnetic latching relay is still less than or equal to the preset potential difference after the magnetic latching relay performs the disconnection action for a preset number of times, the microprocessor will no longer control the magnetic latching relay to perform the disconnection action to avoid damage to the magnetic latching relay.

[0080] In this embodiment, the microprocessor determines whether the magnetic latching relay is in the disconnected state by comparing the current potential difference of the magnetic latching relay with the preset potential difference. When the current potential difference of the magnetic latching relay is less than or equal to the preset potential difference, that is, the moving contact and the static contact of the magnetic latching relay are stuck, the microprocessor controls the magnetic latching relay to cyclically perform the disconnection action until the current potential difference of the magnetic latching relay is greater than the preset potential difference, or until the number of times the magnetic latching relay performs the disconnection action reaches the preset number, which can effectively increase the success rate of the sticking failure of the moving contact and the static contact of the magnetic latching relay, and at the same time, avoid the loss of the magnetic latching relay due to frequent operation.

[0081] Figure 3 A flowchart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application is shown below. Figure 2 and Figure 3 As shown, S104, when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor cyclically executes the above steps of controlling the switching element to perform the disconnection action until the switching element meets the second preset condition. Specifically, it can be: when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor determines whether the number of times the switching element performs the disconnection action reaches the preset number, and when the number of times the switching element performs the disconnection action reaches the preset number, the microprocessor executes S105; when the number of times the switching element performs the disconnection action does not reach the preset number, the microprocessor cyclically executes the steps of controlling the switching element to perform the disconnection action until the switching element meets the second preset condition.

[0082] S105. When the number of disconnection actions performed by the switching element reaches a preset number, the microprocessor controls the shunt release of the low-voltage intelligent capacitor compensation device to operate so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid.

[0083] The preset number of times can be set by the operation and maintenance personnel themselves, and will not be described in detail in this embodiment.

[0084] For example, the preset number of times is two.

[0085] It should be noted that when the number of disconnection actions performed by the magnetic latching relay reaches the preset number of times, and the current potential difference of the magnetic latching relay is still less than or equal to the preset potential difference, it means that there is a serious adhesion or failure between the moving contact and the static contact of the magnetic latching relay, which cannot be solved by repeatedly performing the disconnection action. Therefore, the microprocessor sends a command to the shunt release to enable the shunt release to completely disconnect the low-voltage intelligent capacitor compensation device from the power grid by disconnecting the circuit.

[0086] The shunt release can immediately cut off the connection between the low-voltage intelligent capacitor compensation device and the power grid, ensuring that the low-voltage intelligent capacitor compensation device no longer continues to operate or produces reactive overcompensation under a fault condition, preventing the power grid equipment and the low-voltage intelligent capacitor compensation device from being subjected to excessive current shocks due to the fault, reducing the risk of fault expansion, and extending the life of the low-voltage intelligent capacitor compensation device and power grid equipment.

[0087] In this embodiment, when the number of times the magnetic latching relay performs the disconnection action reaches a preset number and the current potential difference of the magnetic latching relay is still less than or equal to the preset potential difference, the microprocessor forces the low-voltage intelligent capacitor compensation device to be disconnected from the power grid through the shunt release, thereby achieving safety protection for the low-voltage intelligent capacitor compensation device and the power grid, preventing reactive power over-compensation and reactive power reverse transmission problems caused by adhesion between the moving contact and the static contact of the magnetic latching relay, and reducing the risk of the low-voltage intelligent capacitor compensation device and power grid equipment carrying current shocks for a long time due to a failure of the magnetic latching relay, thereby improving the reliability and service life of the low-voltage intelligent capacitor compensation device.

[0088] It should be noted that when protecting the low-voltage intelligent capacitor compensation device, if the microprocessor in S104 cyclically executes the steps of controlling the switching element to perform the disconnection action when the current potential difference of the switching element is less than or equal to the preset potential difference, and the current potential difference of the switching element is greater than the preset potential difference when the number of times the switching element performs the disconnection action has not reached the preset number of times, then the protection method of the low-voltage intelligent capacitor compensation device only needs to execute the above steps S101 to S104, and there is no need to execute the above step S105; if the microprocessor in S104 cyclically executes the steps of controlling the switching element to perform the disconnection action when the current potential difference of the switching element is less than or equal to the preset potential difference, and the number of times the switching element performs the disconnection action reaches the preset number of times, the current potential difference of the switching element is still less than or equal to the preset potential difference, then the protection method of the low-voltage intelligent capacitor compensation device needs to execute the above steps S101 to S105.

[0089] In the embodiment of the present application, first, when the low-voltage intelligent capacitor compensation device meets the first preset condition, the switching element of the low-voltage intelligent capacitor compensation device is controlled to perform a disconnection action, and the current potential difference between the moving contact and the static contact of the switching element is monitored in real time; secondly, the current potential difference of the switching element is compared with the preset potential difference, and when the current potential difference is less than or equal to the preset potential difference, the switching element is cyclically controlled to perform the disconnection action until the current potential difference of the switching element is greater than the preset potential difference, or until the number of times the switching element performs the disconnection action reaches a preset number; wherein, when the current potential difference of the switching element is greater than the preset potential difference, it indicates that The moving contact and the static contact of the switching element have been separated, the switching element is in a disconnected state, and the low-voltage intelligent capacitor compensation device no longer performs reactive power compensation for the power grid; finally, when the number of disconnection actions performed by the switching element reaches a preset number and the current potential difference of the switching element is still less than or equal to the preset potential difference, the low-voltage intelligent capacitor compensation device is forced to be disconnected from the power grid through the shunt release, so as to prevent the low-voltage intelligent capacitor compensation device from continuing to perform reactive power compensation for the power grid, avoid reactive power overcompensation and reactive power reverse transmission, and at the same time, avoid the power factor of the power grid being too low, resulting in an increase in line loss in the power supply circuit, further improving the reliability and service life of the low-voltage intelligent capacitor compensation device.

[0090] In the above embodiment, the microprocessor controls the switching element to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition. Next, the content of a first preset condition is described in detail.

[0091] In a possible embodiment, the low-voltage intelligent capacitor compensation device includes a box, and the switching element and the shunt release are both installed in the box.

[0092] It should be noted that the installation method of the magnetic latching relay and the shunt release in the box is the same as the installation method of the magnetic latching relay and the shunt release in the box in the prior art, and this embodiment will not be repeated.

[0093] The first preset condition is that the current pressure in the box is equal to the preset pressure.

[0094] The preset pressure is the dividing value for distinguishing whether an explosion occurs in the box.

[0095] It should be noted that since explosions are usually accompanied by rapid gas expansion and a sharp rise in pressure, the pressure inside the box can be used as a monitoring indicator to monitor potential explosion risks.

[0096] During the operation of the low-voltage intelligent capacitor compensation device, abnormal current, short circuit or component failure may cause the electrical components in the box to overheat, generate gas or a small range of chemical reactions. If these gases gather and cannot be discharged in time, the pressure in the box will gradually increase, and when it reaches a critical value, it indicates that the risk of explosion increases.

[0097] The preset pressure is the safety critical pressure value in the box. When the current pressure in the box reaches or exceeds the preset pressure, it means that gas may be rapidly generated inside the box and the box may explode.

[0098] It should be noted that the preset pressure can be set by the operation and maintenance personnel themselves, and this embodiment will not be described in detail.

[0099] In this embodiment, when the current pressure in the box of the low-voltage intelligent capacitor compensation device is equal to the preset pressure, the microprocessor controls the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action, and executes the above steps S102 to S104, or executes the above steps S102 to S105.

[0100] In an embodiment of the present application, the current pressure in the box is set to be equal to the preset pressure as the first preset condition. When the current pressure in the box is equal to the preset pressure, the microprocessor of the low-voltage intelligent capacitor compensation device will control the switching element to disconnect, or start the shunt release to disconnect the low-voltage intelligent capacitor compensation device from the power grid, thereby preventing the risk of explosion due to gas accumulation or abnormal reaction, and improving the safety and reliability of the use of the low-voltage intelligent capacitor compensation device.

[0101] In the above embodiment, the microprocessor needs to control the switching element to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition. Next, the specific process of the microprocessor controlling the switching element to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition is described in detail.

[0102] In a possible embodiment, S101, the microprocessor controls the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition. This can be achieved through S1011 and S1012. S1011 and S1012 are described in detail below.

[0103] S1011. The microprocessor receives a first signal sent by the detection module.

[0104] The first signal is used to indicate that the current pressure in the box is equal to the preset pressure.

[0105] It should be noted that the detection module is used to detect the current pressure in the box in real time. When the detection module detects that the current pressure in the box is equal to the preset pressure, a first signal is sent to the microprocessor; when the detection module detects that the current pressure in the box is less than the preset pressure, a second signal is sent to the microprocessor, and the second signal is used to indicate that the current pressure in the box is less than the preset pressure.

[0106] The detection module can be a pressure sensor (piezoresistive pressure sensor, capacitive pressure sensor, optical fiber pressure sensor), a micro switch, a differential pressure switch, or other sensor modules that can detect pressure changes in the box in real time. This embodiment does not make specific limitations on this.

[0107] In this embodiment, a detection module is set to perform real-time detection of the current pressure in the box, and when it is detected that the current pressure in the box is equal to the preset pressure, a first signal is sent to the microprocessor, thereby providing accurate and real-time trigger conditions for the subsequent protection operation of the low-voltage intelligent capacitor compensation device, so that the low-voltage intelligent capacitor compensation device can quickly initiate protection measures when the current pressure in the box reaches the preset pressure, thereby preventing the box from exploding, thereby improving the safety of using the low-voltage intelligent capacitor compensation device.

[0108] S1012: The microprocessor controls the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action based on the first signal.

[0109] It should be noted that after receiving the first signal sent by the detection module, the microprocessor controls the switching element to perform a disconnection action to cut off the connection between the capacitor in the low-voltage intelligent capacitor compensation device and the power grid, so that the low-voltage intelligent capacitor compensation device stops reactive compensation and prevents the low-voltage intelligent capacitor compensation device from continuing to operate in a dangerous state.

[0110] In an embodiment of the present application, a detection module is set to detect the current pressure in the box in real time to ensure that when the current pressure in the box reaches a preset pressure, the microprocessor can immediately receive the first signal sent by the detection module and control the switching element to perform a disconnection action, thereby achieving a rapid response to abnormal pressure inside the box, preventing safety hazards caused by excessive high pressure, and effectively preventing the risk of explosion of the low-voltage intelligent capacitor compensation device, extending the service life of the low-voltage intelligent capacitor compensation device, and significantly enhancing the safety and reliability of the use of the low-voltage intelligent capacitor compensation device.

[0111] In the above embodiment, the microprocessor needs to receive the first signal sent by the detection module. Next, the specific structure of the detection module is described in detail.

[0112] In a possible embodiment, the detection module is a micro switch, and the first signal is a high level signal.

[0113] Among them, the micro switch is a switching device that detects pressure or other physical changes through mechanical contacts. The contacts of the micro switch are automatically triggered when the pressure reaches the preset pressure and converted into an electrical signal.

[0114] It should be noted that the micro switch is installed on the box body and extends into the box body.

[0115] When the current pressure in the box is equal to the preset pressure, the micro switch is triggered, the micro switch outputs a high level signal (first signal), and sends the first signal to the microprocessor.

[0116] When the current pressure in the box is less than the preset pressure, the micro switch is not triggered, and the micro switch outputs a low level signal (second signal) and sends the second signal to the microprocessor. The microprocessor does not perform any action when receiving the second signal sent by the micro switch.

[0117] In the embodiment of the present application, the micro switch is set as a detection module, and the current pressure in the box is simply and reliably monitored by the micro switch. When the current pressure in the box reaches the preset pressure, the micro switch sends a high-level signal to the microprocessor, and the microprocessor immediately controls the switching element to perform a disconnection action according to the high-level signal, preventing the low-voltage intelligent capacitor compensation device from continuing to operate under abnormal pressure, effectively reducing safety hazards, and facilitating the stable operation of the low-voltage intelligent capacitor compensation device.

[0118] In the above embodiment, when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor needs to cyclically execute the above steps of controlling the switching element to perform the disconnection action until the current potential difference of the switching element is greater than the preset potential difference. Next, the step b that the microprocessor needs to execute after the first preset condition is that the current pressure in the box is equal to the preset pressure, the low-voltage intelligent capacitor compensation device meets the first preset condition, and the current potential difference of the switching element is greater than the preset potential difference is described in detail.

[0119] Figure 2 A flow chart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application. Figure 2 As shown, in a possible embodiment, in S104, when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor cyclically executes the above-mentioned step of controlling the switching element to perform the disconnection action until the switching element meets the second preset condition. The method also includes step b, and step b is described in detail below.

[0120] Step b: the microprocessor outputs a first alarm signal and controls the switching element to remain in an off state.

[0121] When the first preset condition is that the current pressure in the box is equal to the preset pressure, the low-voltage intelligent capacitor compensation device meets the first preset condition, and the current potential difference of the switching element is greater than the preset potential difference, the microprocessor outputs a first alarm signal and controls the switching element to remain in the disconnected state.

[0122] The first alarm signal is used to remind the operation and maintenance personnel that the low-voltage intelligent capacitor compensation device has failed and the switching element is in a disconnected state.

[0123] It should be noted that the microprocessor may output the first alarm signal through a display in the low-voltage intelligent capacitor compensation device, or may output the first alarm signal through other methods, which is not specifically limited in this embodiment.

[0124] When the current pressure in the low-voltage intelligent capacitor compensation device is equal to the preset pressure, the microprocessor controls the switching element to perform the disconnection action. In order to prevent the switching element from accidentally closing and causing the box to explode when the fault in the box has not been completely eliminated, the microprocessor needs to further control the switching element to remain in the disconnected state, ensuring that the switching element will not close again when the current pressure in the box is greater than the preset pressure, thereby preventing potential safety hazards and avoiding the risk of explosion caused by continued reactive power compensation, significantly improving the safety and reliability of the low-voltage intelligent capacitor compensation device in hazardous environments.

[0125] In an embodiment of the present application, when the current pressure in the box of the low-voltage intelligent capacitor compensation device is equal to the preset pressure and the current potential difference of the switching element is greater than the preset potential difference, the microprocessor outputs a first alarm signal and controls the switching element to remain in a disconnected state, ensuring that the switching element is no longer closed, thereby preventing the risk of explosion caused by accidental operation of the low-voltage intelligent capacitor compensation device, improving the reliability and safety of the low-voltage intelligent capacitor compensation device in hazardous environments, providing timely fault feedback for operation and maintenance personnel, and significantly enhancing the overall safety performance of the low-voltage intelligent capacitor compensation device.

[0126] In the above embodiment, the microprocessor controls the switching element to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition. Next, another first preset condition is described in detail.

[0127] In another possible embodiment, the first preset condition is at least one of an overvoltage protection condition, an undervoltage protection condition, a three-phase unbalance protection condition, a power-on protection condition, and a power-off protection condition.

[0128] It should be noted that when the grid voltage exceeds the rated value, the low-voltage intelligent capacitor compensation device will trigger overvoltage protection. Excessive voltage may damage the capacitor and switching components in the low-voltage intelligent capacitor compensation device, so the first preset condition can be an overvoltage protection condition.

[0129] When the grid voltage is lower than the rated value, the low-voltage intelligent capacitor compensation device will trigger undervoltage protection and cut off the reactive compensation of the capacitor to avoid invalid compensation. Therefore, the first preset condition can also be an undervoltage protection condition.

[0130] When the three-phase voltage or current in the power grid is unbalanced, it may cause abnormal heating or even damage to the low-voltage intelligent capacitor compensation device and other equipment. Therefore, the first preset condition may also be a three-phase unbalance protection condition.

[0131] The instantaneous impact during power-on may cause damage to the low-voltage intelligent capacitor compensation device, so the first preset condition may also be a power-on protection condition.

[0132] The power-off protection condition is triggered when the low-voltage intelligent capacitor compensation device is powered off or the power is interrupted to prevent the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact of the impact on the low-voltage intelligent capacitor compensation device caused by the sudden restoration of power supply. Therefore, the first preset condition can also be the power-off protection condition.

[0133] In addition, the first preset condition may also be an over-temperature protection condition, a harmonic voltage over-limit protection condition, a harmonic current over-limit protection condition, a phase loss protection condition, etc., which is not specifically limited in this embodiment.

[0134] The contents of the over-temperature protection conditions, harmonic voltage over-limit protection conditions, harmonic current over-limit protection conditions and phase loss protection conditions are the same as those in the prior art, and are not described in detail in this embodiment.

[0135] In the embodiment of the present application, by setting the overvoltage protection condition, undervoltage protection condition, three-phase unbalanced protection condition, power-on protection condition or power-off protection condition as the first preset condition, the adaptability and protection capability of the low-voltage intelligent capacitor compensation device under various abnormal power conditions are significantly enhanced. Its technical effect is that the low-voltage intelligent capacitor compensation device can respond quickly when the power environment fluctuates abnormally, control the switching element to perform the disconnection action, cut off the reactive power compensation function of the low-voltage intelligent capacitor compensation device, prevent the low-voltage intelligent capacitor compensation device from being damaged or malfunctioning, and ensure the safe operation of the low-voltage intelligent capacitor compensation device under complex power conditions, thereby effectively improving the stability and reliability of the low-voltage intelligent capacitor compensation device.

[0136] In the above embodiment, when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor needs to cyclically execute the above steps of controlling the switching element to perform the disconnection action until the current potential difference of the switching element is greater than the preset potential difference. Next, when the first preset condition is at least one of the overvoltage protection condition, the undervoltage protection condition, the three-phase unbalanced protection condition, the power-on protection condition, and the power-off protection condition, the low-voltage intelligent capacitor compensation device meets the first preset condition, and the current potential difference of the switching element is greater than the preset potential difference, the step c that the microprocessor needs to execute is described in detail.

[0137] Figure 3 A flowchart of another protection method for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application is shown below. Figure 3 As shown, in another possible embodiment, in S104, when the current potential difference of the switching element is less than or equal to the preset potential difference, the microprocessor cyclically executes the above-mentioned step of controlling the switching element to perform the disconnection action until the switching element meets the second preset condition. The method also includes step c, and step c is described in detail below.

[0138] Step c: the microprocessor outputs a second alarm signal, and when the low-voltage intelligent capacitor compensation device meets normal working conditions, controls the switching element to perform a closing action.

[0139] The closing action is used to put the switching element in a closed state.

[0140] When the first preset condition is at least one of the overvoltage protection condition, the undervoltage protection condition, the three-phase unbalance protection condition, the power-on protection condition, and the power-off protection condition, and the low-voltage intelligent capacitor compensation device meets the first preset condition, and the current potential difference of the switching element is greater than the preset potential difference, the microprocessor outputs a second alarm signal, and when the low-voltage intelligent capacitor compensation device meets the normal working conditions, controls the switching element to perform a closing action.

[0141] The second alarm signal is used to remind the operation and maintenance personnel that the fault of the low-voltage intelligent capacitor compensation device has been eliminated and the switching element has returned to a controllable state.

[0142] It should be noted that the microprocessor may output the second alarm signal through a display in the low-voltage intelligent capacitor compensation device, or may output the second alarm signal through other methods, which is not specifically limited in this embodiment.

[0143] Normal operating conditions are when the voltage, current and other parameters of the power grid return to a safe range.

[0144] The microprocessor controls the switching element to perform a disconnection action when the first preset condition is at least one of an overvoltage protection condition, an undervoltage protection condition, a three-phase unbalanced protection condition, a power-on protection condition, and a power-off protection condition, and the low-voltage intelligent capacitor compensation device meets the first preset condition. When the low-voltage intelligent capacitor compensation device meets normal working conditions, the microprocessor controls the switching element to perform a closing action, so that the low-voltage intelligent capacitor compensation device can resume reactive power compensation operation after safety detection, thereby avoiding the impact of the power factor and power quality of the power grid due to the long-term shutdown of the low-voltage intelligent capacitor compensation device.

[0145] In an embodiment of the present application, the microprocessor outputs a second alarm signal when the first preset condition is at least one of an overvoltage protection condition, an undervoltage protection condition, a three-phase unbalance protection condition, a power-on protection condition, and a power-off protection condition, and the low-voltage intelligent capacitor compensation device meets the first preset condition and the current potential difference of the switching element is greater than the preset potential difference, and controls the switching element to perform a closing action when the low-voltage intelligent capacitor compensation device meets normal working conditions, so that the low-voltage intelligent capacitor compensation device can resume reactive compensation operation after safety detection, thereby avoiding affecting the power factor and power quality of the power grid due to long-term shutdown of the low-voltage intelligent capacitor compensation device.

[0146] In the above embodiment, the microprocessor needs to control the shunt release of the low-voltage intelligent capacitor compensation device to operate when the number of disconnection actions performed by the switching element reaches a preset number of times, so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid. Next, the specific process of the microprocessor controlling the shunt release of the low-voltage intelligent capacitor compensation device to operate when the number of disconnection actions performed by the switching element reaches a preset number of times, so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid is described in detail.

[0147] In a possible embodiment, S105, the microprocessor controls the shunt release of the low-voltage intelligent capacitor compensation device to operate when the number of disconnection actions performed by the switching element reaches a preset number, so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid. This can be achieved through S1051 and S1052. S1051 and S1052 are described in detail below.

[0148] S1051: When the number of disconnection actions performed by the switching element reaches a preset number, the microprocessor sends a first message to a target device, so that the target device outputs target prompt information based on the first message.

[0149] In the case of reactive power compensation for the power grid, multiple low-voltage intelligent capacitor compensation devices are required to work simultaneously to perform reactive power compensation for the power grid.

[0150] Among them, the target device can be a microprocessor of a target low-voltage intelligent capacitor compensation device among multiple low-voltage intelligent capacitor compensation devices, or it can be a controller dedicated to managing multiple low-voltage intelligent capacitor compensation devices. This embodiment does not make specific limitations on this.

[0151] It should be noted that the target low-voltage intelligent capacitor compensation device is a low-voltage intelligent capacitor compensation device selected from multiple low-voltage intelligent capacitor compensation devices based on the host election rule. The host election rule is an existing rule and will not be described in detail in this embodiment.

[0152] The first message is used to notify the target device that a switching element of the low-voltage intelligent capacitor compensation device where the microprocessor is located has failed.

[0153] It should be noted that the first message may be a fault warning message, for example, "switching component failure, please check".

[0154] The target prompt information is used to indicate a switching component failure.

[0155] It should be noted that the target prompt information is used to indicate a switching component failure and to prompt the operation and maintenance personnel to take necessary inspection and maintenance measures on the switching component.

[0156] In this embodiment, the microprocessor can send a first message to the target device, so that the target device outputs target prompt information based on the first message. The target device can also detect the status of the low-voltage intelligent capacitor compensation device in real time, and actively output the target prompt information when a switching element failure of the low-voltage intelligent capacitor compensation device is detected.

[0157] S1052. The microprocessor controls the shunt release of the low-voltage intelligent capacitor compensation device to operate so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid.

[0158] It should be noted that the implementation method of S1052 is the same as the implementation method of the embodiment shown in the above S105, and this embodiment will not elaborate on it.

[0159] In an embodiment of the present application, when the number of times the magnetic latching relay performs the disconnection action reaches a preset number and the current potential difference of the magnetic latching relay is still less than or equal to the preset potential difference, the microprocessor sends a first message to the target device, so that the target device outputs target prompt information based on the first message, prompting the operation and maintenance personnel to take necessary inspection and maintenance measures for the switching elements; at the same time, the low-voltage intelligent capacitor compensation device is forced to be disconnected from the power grid through the shunt release, thereby achieving safety protection for the low-voltage intelligent capacitor compensation device and the power grid, preventing reactive over-compensation and reactive reverse transmission problems caused by the adhesion of the moving contact and the static contact of the magnetic latching relay, and reducing the risk of the low-voltage intelligent capacitor compensation device and the power grid equipment carrying current shocks for a long time due to the failure of the magnetic latching relay, thereby improving the reliability and service life of the low-voltage intelligent capacitor compensation device.

[0160] Figure 4 A schematic diagram of the structure of a protection device for a low-voltage intelligent capacitor compensation device provided in an embodiment of the present application. Figure 4 As shown, the protection device 400 of the low-voltage intelligent capacitor compensation device provided in this embodiment can exist independently and be used to implement the operations corresponding to the microprocessor in the above method embodiment.

[0161] The protection device 400 of the low voltage intelligent capacitor compensation device may include: a transceiver module 401 and a processing module 402. The processing module 402 is used for data processing, and the transceiver module 401 may implement corresponding communication functions. The transceiver module 401 may also be called a communication interface or a communication unit.

[0162] Optionally, the protection device 400 of the low-voltage intelligent capacitor compensation device may also include a storage unit, which can be used to store instructions and / or data. The processing module 402 can read the instructions and / or data in the storage unit so that the protection device 400 of the low-voltage intelligent capacitor compensation device implements the steps implemented by the microprocessor in the aforementioned method embodiment.

[0163] The transceiver module 401 is used to execute the reception-related operations of the microprocessor in the above method embodiment, and the processing module 402 is used to execute the processing-related operations of the microprocessor in the above method embodiment.

[0164] Optionally, the transceiver module 401 may include a sending module and a receiving module. The sending module is used to perform the sending operation in the above method embodiment. The receiving module is used to perform the receiving operation in the above method embodiment.

[0165] It should be noted that the protection device 400 of the low-voltage intelligent capacitor compensation device may include a sending module but not a receiving module. Alternatively, the protection device 400 of the low-voltage intelligent capacitor compensation device may include a receiving module but not a sending module. Specifically, it depends on whether the above scheme executed by the protection device 400 of the low-voltage intelligent capacitor compensation device includes a sending action and a receiving action.

[0166] As an example, the protection device 400 of the low-voltage intelligent capacitor compensation device is used to perform the above Figure 1 The actions performed by the microprocessor in the illustrated embodiment.

[0167] The protection device 400 of the low-voltage intelligent capacitor compensation apparatus may include: a transceiver module 401 and a processing module 402 .

[0168] The processing module 402 is used to control the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action when the low-voltage intelligent capacitor compensation device meets the first preset condition; wherein the disconnection action is used to put the switching element in a disconnected state.

[0169] The processing module 402 is further configured to obtain a first voltage value corresponding to a stationary contact of the switching element and a second voltage value corresponding to a moving contact of the switching element.

[0170] The processing module 402 is further configured to determine a current potential difference of the switching element according to the first voltage value and the second voltage value.

[0171] The processing module 402 is further used to, when the current potential difference of the switching element is less than or equal to the preset potential difference, cyclically execute the above-mentioned step of controlling the switching element to perform the disconnection action until the switching element meets the second preset condition; wherein the second preset condition is that the current potential difference of the switching element is greater than the preset potential difference, or the number of times the switching element performs the disconnection action reaches a preset number; the preset potential difference is a dividing value for distinguishing between connection and disconnection of the switching element.

[0172] The processing module 402 is also used to control the shunt release of the low-voltage intelligent capacitor compensation device to operate when the number of disconnection actions performed by the switching element reaches a preset number, so as to disconnect the low-voltage intelligent capacitor compensation device from the power grid.

[0173] It should be understood that the execution of the above-mentioned corresponding processes by each module has been described in detail in the above-mentioned method embodiment, and for the sake of brevity, it will not be repeated here.

[0174] The processing module 402 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 401 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 401 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0175] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown, the electronic device 500 provided in this embodiment includes: a memory 501 and a processor 502 .

[0176] The memory 501 may be an independent physical unit, and may be connected to the processor 502 via a bus 503. The memory 501 and the processor 502 may also be integrated together and implemented by hardware. The memory 501 is used to store program instructions, and the processor 502 calls the program instructions to execute the operations performed by the microprocessor in any of the above method embodiments.

[0177] Optionally, when part or all of the methods of the above embodiments are implemented by software, the electronic device 500 may also include only a processor 502. The memory 501 for storing programs is located outside the electronic device 500, and the processor 502 is connected to the memory through circuits / wires for reading and executing the programs stored in the memory. The processor 502 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 502 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0178] The memory 501 may include a volatile memory, such as a random-access memory (RAM); the memory may also include a non-volatile memory, such as a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above types of memory.

[0179] Illustratively, the present application provides a chip, comprising: an interface circuit and a logic circuit, wherein the interface circuit is used to receive signals from other chips outside the chip and transmit them to the logic circuit, or to send signals from the logic circuit to other chips outside the chip, and the logic circuit is used to execute the operations performed by the microprocessor in the above method embodiment.

[0180] Illustratively, the present application provides a computer-readable storage medium on which computer program instructions are stored. The computer program instructions are executed by a processor of an electronic device so that the electronic device performs the operations performed by the microprocessor in the above method embodiment.

[0181] Illustratively, the present application provides a computer program product. When the computer program product is executed on an electronic device, the electronic device executes the operations executed by the microprocessor in the above method embodiment.

[0182] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protection method for a low-voltage intelligent capacitor compensation device, characterized in that: The method comprises: When the low-voltage intelligent capacitor compensation device meets the first preset condition, controlling the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action; wherein the disconnection action is used to put the switching element in a disconnected state; Acquire a first voltage value corresponding to the stationary contact of the switching element, and a second voltage value corresponding to the moving contact of the switching element; determining a current potential difference of the switching element according to the first voltage value and the second voltage value; In the case where the current potential difference of the switching element is less than or equal to the preset potential difference, the above steps of controlling the switching element to perform the disconnection action are cyclically performed until the switching element meets a second preset condition; wherein the second preset condition is that the current potential difference of the switching element is greater than the preset potential difference, or the number of times the switching element performs the disconnection action reaches a preset number; the preset potential difference is a dividing value for distinguishing between connection and disconnection of the switching element; When the number of disconnection actions performed by the switching element reaches a preset number, the shunt release of the low-voltage intelligent capacitor compensation device is controlled to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid.

2. The method according to claim 1, characterized in that The low-voltage intelligent capacitor compensation device comprises a box, and the switching element and the shunt release are both installed in the box; The first preset condition is that the current pressure in the box is equal to the preset pressure; wherein the preset pressure is a dividing value for distinguishing whether the box explodes.

3. The method according to claim 2, characterized in that When the low-voltage intelligent capacitor compensation device meets the first preset condition, controlling the switching element of the low-voltage intelligent capacitor compensation device to perform a disconnection action includes: Receive a first signal sent by a detection module; wherein the first signal is used to indicate that the current pressure in the box is equal to the preset pressure; Based on the first signal, the switching element of the low-voltage intelligent capacitor compensation device is controlled to perform a disconnection action.

4. The method according to claim 3, characterized in that The detection module is a micro switch, and the first signal is a high level signal.

5. The method according to claim 2, characterized in that: In the case where the current potential difference of the switching element is less than or equal to the preset potential difference, the step of controlling the switching element to perform the disconnection action is cyclically performed until the current potential difference of the switching element is not the preset potential difference, and the method further includes: A first alarm signal is output, and the switching element is controlled to remain in an off state.

6. The method according to claim 1, characterized in that The first preset condition is at least one of an overvoltage protection condition, an undervoltage protection condition, a three-phase unbalance protection condition, a power-on protection condition, and a power-off protection condition.

7. The method according to claim 6, characterized in that In the case where the current potential difference of the switching element is less than or equal to the preset potential difference, the step of controlling the switching element to perform the disconnection action is cyclically performed until the current potential difference of the switching element is not the preset potential difference, and the method further includes: A second alarm signal is outputted, and when the low-voltage intelligent capacitor compensation device meets normal working conditions, the switching element is controlled to perform a closing action; wherein the closing action is used to put the switching element in a closed state.

8. The method according to claim 1, characterized in that When the number of disconnection actions performed by the switching element reaches a preset number, controlling the shunt release of the low-voltage intelligent capacitor compensation device to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid, including: When the number of times the switching element performs the disconnection action reaches a preset number, sending a first message to a target device so that the target device outputs target prompt information based on the first message; wherein the target prompt information is used to indicate a fault of the switching element; The shunt release of the low-voltage intelligent capacitor compensation device is controlled to operate so that the low-voltage intelligent capacitor compensation device is disconnected from the power grid.

9. An electronic device, characterized in that: include: memory and at least one processor; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed, the method according to any one of claims 1 to 8 is implemented.

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