Capacitor switching method, intelligent capacitor device and electronic equipment

Abstract

The present application provides a capacitor switching method, an intelligent capacitor device and an electronic device, which belongs to the technical field of power equipment. The capacitor switching method includes: determining the first state information of the target capacitor connected to the target phase line, the first state information is used to indicate the first state of the target capacitor at the current moment; based on the power factor of the target phase line, determining the second state information of the target capacitor, the second state information is used to indicate the second state of the target capacitor at the next moment; when the second state is inconsistent with the first state, according to the first switch unit in the target switching switch, determine the second switch unit in the target switching switch; based on the second state, control the second switch unit to perform a conduction or disconnection action, and control the other switch units in the target switching switch except the second switch unit to remain in the conduction state, so that the target capacitor is connected to the target phase line at the next moment, or the target capacitor is disconnected from the target phase line at the next moment.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment, and in particular to a capacitor switching method, an intelligent capacitor device and an electronic device. Background Art

[0002] With the rapid development of power systems and the continuous improvement of power quality requirements, reactive power compensation equipment plays an increasingly important role in power systems. Reactive power compensation can not only improve the power factor of the power grid and reduce line losses, but also improve the stability and safety of the power system. As an important part of reactive power compensation equipment, smart capacitor devices are widely used in various power systems to adjust the reactive power of the power grid in real time.

[0003] In the prior art, when switching capacitors in smart capacitor devices, magnetic latching relays are usually used as switching switches. Magnetic latching relays have high mechanical strength and fast response characteristics, but they are prone to contact wear during frequent switching operations, resulting in a shortened electrical life. They are difficult to meet the stability and durability required for frequent switching of capacitors, affecting the overall reliability of smart capacitor devices. Summary of the invention

[0004] The present application provides a capacitor switching method, an intelligent capacitor device and an electronic device to solve the problem in the prior art that the switching switch is prone to contact wear during frequent switching operations, resulting in a shortened electrical life of the switching switch and poor reliability of the intelligent capacitor device.

[0005] In a first aspect, the present application provides a capacitor switching method, which is applied to an intelligent capacitor device, wherein the intelligent capacitor device includes a controller, multiple capacitors and multiple switching switches; the capacitors are connected to one or more phase lines of a three-phase alternating current; the switching switches include multiple switch units connected in series, the first switch unit connected in series is connected to an output end of a phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller.

[0006] The capacitor switching method comprises:

[0007] Determine first state information of a target capacitor connected to a target phase line; wherein the target phase line is any phase line of the three-phase alternating current; the first state information is used to indicate a first state of the target capacitor at a current moment, the first state being an on-state or a off-state;

[0008] Determine the second state information of the target capacitor based on the power factor of the target phase line; wherein the second state information is used to indicate the second state of the target capacitor at the next moment, and the second state is an input state or a disconnected state;

[0009] In the case where the second state is inconsistent with the first state, the second switch unit in the target switching switch is determined according to the first switch unit in the target switching switch; the target switching switch is the switching switch connected to the target capacitor; the first switch unit is the switch unit that last performed a conduction or disconnection action in the target switching switch; in the case where the first switch unit last performed a conduction action, the second switch unit is a switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; in the case where the first switch unit last performed a disconnection action, the second switch unit is the first switch unit;

[0010] Based on the second state, the second switch unit is controlled to perform an on or off action, and the other switch units in the target switching switch except the second switch unit are controlled to remain in the on state, so that the target capacitor is connected to the target phase line at the next moment, or the target capacitor is disconnected from the target phase line at the next moment.

[0011] The embodiment of the present application provides a capacitor switching method, which is applied to an intelligent capacitor device. The intelligent capacitor device includes a controller, multiple capacitors and multiple switching switches, and each switching switch includes multiple switch units connected in series. In the switching method, first, the first state of the target capacitor connected to the target phase line at the current moment is determined; secondly, the second state of the target capacitor at the next moment is determined based on the power factor of the target phase line, and when the second state is inconsistent with the first state, the second switch unit in the target switching switch connected to the target capacitor is determined according to the first switch unit in the target switching switch; finally, based on the second state, the second single switch is controlled to perform a conduction or disconnection action, and the other switch units except the second switch unit in the target switching switch are controlled to remain in a conducting state, so that the target capacitor is put into the target phase line at the next moment, or the target capacitor is cut off from the target phase line at the next moment. In the present application, the first switch unit in the target switching switch is the switch unit that last performed a conduction or disconnection action in the target switching switch. When the switch unit last performed a conduction action, the second switch unit is the switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; when the switch unit last performed a disconnection action, the second switch unit is the first switch unit. Compared with the prior art, the capacitor switching method of the present application can control different switch units in the target switching switch to switch the target capacitor in turn through a controller when the target capacitor is frequently switched, so as to evenly distribute the load of the frequent switching operation to each switch unit of the target switching switch, thereby reducing the operating frequency of a single switch unit, thereby effectively reducing the contact wear of a single switch unit, extending the electrical life of the target switching switch, and significantly improving the reliability of the intelligent capacitor device.

[0012] In one possible design, determining the second state information of the target capacitor based on the power factor of the target phase line includes:

[0013] Based on the power factor of the target phase line, an action instruction related to the target capacitor is generated; wherein the action instruction includes a holding instruction, an input instruction or a removal instruction; the holding instruction is used to make the target capacitor maintain the first state at the next moment; the input instruction is used to make the target capacitor be in the input state at the next moment; the removal instruction is used to make the target capacitor be in the removal state at the next moment;

[0014] The second state information is determined according to the action instruction.

[0015] In a possible design, when the first state is the switched-on state and the second state is the switched-off state, based on the second state, controlling the second switch unit to perform a switching-on or switching-off action, and controlling the other switch units in the target switching switch except the second switch unit to maintain a switching-on state, includes:

[0016] Based on the cut-off state, the second switch unit is controlled to perform a disconnection action, and the other switch units except the second switch unit in the target switching switch are controlled to remain in a conductive state, so that the target capacitor is disconnected from the target phase line at the next moment.

[0017] In a possible design, after controlling the second switch unit to perform a disconnection action based on the cut-off state, and controlling other switch units in the target switching switch except the second switch unit to maintain a conducting state, the method further includes:

[0018] Based on the first voltage and the second voltage respectively corresponding to both ends of the target switching switch, it is determined whether the target capacitor is successfully removed.

[0019] In a possible design, after judging whether the target capacitor is successfully removed based on the first voltage and the second voltage respectively corresponding to the two ends of the target switching switch, the method further includes:

[0020] In the case where the target capacitor fails to be removed, determining whether there is first identification information corresponding to the third switch unit in the fault record table; wherein the third switch unit is the switch unit that cannot be disconnected in the target switching switch;

[0021] If the first identification information does not exist in the fault record table, the second identification information corresponding to the second switch unit is used as the first identification information, and the second switch unit is regarded as the first switch unit, and the step of determining the second switch unit in the target switching switch according to the first switch unit in the target switching switch is repeatedly performed until the target capacitor is successfully removed or the target capacitor fails to be removed again;

[0022] When the target capacitor fails to be removed again and the first identification information exists in the fault record table, determining whether the third identification information is the same as the first identification information; wherein the third identification information is the identification information of the second switch unit corresponding to the target capacitor failing to be removed again;

[0023] When the third identification information is different from the first identification information, the second switch unit corresponding to the failure of the target capacitor to be removed again is regarded as the first switch unit, and the steps of determining the second switch unit in the target switching switch according to the first switch unit in the target switching switch are repeated until the target capacitor is successfully removed, or the third identification information is the same as the first identification information.

[0024] In a possible design, when the first identification information does not exist in the fault record table, the method further includes:

[0025] Sending a first alarm message; wherein the first alarm message is used to indicate that the second switch unit cannot be disconnected;

[0026] When the third identification information is the same as the first identification information, the method further includes:

[0027] Send a second alarm message; wherein the second alarm message is used to indicate that a removal fault occurs in the smart capacitor device.

[0028] In a possible design, when the first state is the cut-off state and the second state is the switched-on state, based on the second state, controlling the second switch unit to perform a switching-on or switching-off action, and controlling the other switch units in the target switching switch except the second switch unit to maintain a switching-on state, includes:

[0029] Based on the input state, the second switch unit is controlled to perform a conduction action, and other switch units except the second switch unit in the target switching switch are controlled to maintain a conduction state, so that the target capacitor is input into the target phase line at the next moment.

[0030] In a possible design, after controlling the second switch unit to perform a conduction action based on the input state, and controlling other switch units in the target switching switch except the second switch unit to maintain a conduction state, the method further includes:

[0031] Based on the first voltage and the second voltage respectively corresponding to the two ends of the target capacitor, judging whether the target capacitor is successfully invested;

[0032] In the case where the target capacitor fails to be put into operation, a third alarm message is sent; wherein the third alarm message is used to indicate that a failure has occurred in the intelligent capacitor device.

[0033] In a second aspect, the present application provides a smart capacitor device, the smart capacitor device comprising a controller, a plurality of capacitors and a plurality of switching switches;

[0034] The capacitor is connected to one or more phase lines of three-phase alternating current;

[0035] The switching switch comprises a plurality of switch units connected in series, wherein the first switch unit connected in series is connected to the output end of one phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller;

[0036] Wherein, the controller is used to execute the method described in the first aspect or various possible designs of the first aspect.

[0037] In a third aspect, the present application provides an electronic device, including: a memory and at least one processor;

[0038] The memory stores computer-executable instructions;

[0039] 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.

[0040] In a fourth 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 is implemented.

[0041] In a fifth aspect, the present application provides a computer program product, which includes a computer program code. When the computer program code runs on a computer, the computer implements the method described in the first aspect or various possible designs of the first aspect.

[0042] In a sixth aspect, 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 implement the method described in the first aspect or various possible designs of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A flow chart of a capacitor switching method provided in an embodiment of the present application;

[0044] Figure 2 A circuit principle block diagram of a smart capacitor device provided in an embodiment of the present application;

[0045] Figure 3A circuit principle block diagram of another smart capacitor device provided in an embodiment of the present application;

[0046] Figure 4 A schematic diagram of a flow chart of another capacitor switching method provided in an embodiment of the present application;

[0047] Figure 5 A schematic diagram of the structure of a capacitor switching device provided in an embodiment of the present application;

[0048] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In the description of the present application, unless otherwise specified, "plurality" 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).

[0055] 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.

[0056] 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.

[0057] First, the terms involved in one or more embodiments of this specification are explained.

[0058] The separate compensation capacitor device is used to independently compensate each phase current in the three-phase four-wire power supply system. The separate compensation capacitor device can realize independent control of the three-phase current of A, B, and C through the switching switch, and provide compensation for each phase current respectively, so that the capacitor of each phase can be independently put into or out of the working state as needed. The separate compensation capacitor device is suitable for three-phase AC power systems with unbalanced loads.

[0059] The common compensation capacitor device is used to compensate the three phases of three-phase AC power at the same time. The three-phase capacitors of the common compensation capacitor device are simultaneously put into or removed at the same time, that is, the compensation of the three-phase current is carried out synchronously. The common compensation capacitor device is suitable for three-phase AC power with relatively balanced loads and the need to improve the power factor as a whole.

[0060] The following is an introduction to the implementation background of the technical solution provided in the embodiments of the present application.

[0061] With the rapid development of power systems and the continuous improvement of power quality requirements, reactive power compensation equipment plays an increasingly important role in power systems. Reactive power compensation can not only improve the power factor of the power grid and reduce line losses, but also improve the stability and safety of the power system. As an important part of reactive power compensation equipment, smart capacitor devices are widely used in various power systems to adjust the reactive power of the power grid in real time, thereby optimizing the operating efficiency and stability of the power system.

[0062] In the prior art, magnetic latching relays are usually used as the switching switch of capacitors in intelligent capacitor devices due to their high mechanical strength and fast response characteristics. However, in practical applications, after frequent switching operations, the contacts of magnetic latching relays will wear out, resulting in a shortened electrical life, making it difficult to meet the stability and durability required for frequent switching of capacitors. The contact wear of magnetic latching relays not only reduces the reliability of magnetic latching relays, but may also affect the overall stability of the intelligent capacitor device, thereby affecting the stable operation of the entire power system.

[0063] Based on the problems existing in the related art, the present application provides a capacitor switching method, which is applied to an intelligent capacitor device. The intelligent capacitor device includes a controller, multiple capacitors and multiple switching switches, and each switching switch includes multiple switch units connected in series. In the switching method, first, the first state of the target capacitor connected to the target phase line at the current moment is determined; secondly, the second state of the target capacitor at the next moment is determined based on the power factor of the target phase line, and when the second state is inconsistent with the first state, the second switch unit in the target switching switch connected to the target capacitor is determined according to the first switch unit in the target switching switch; finally, based on the second state, the second single switch is controlled to perform a conduction or disconnection action, and the other switch units except the second switch unit in the target switching switch are controlled to remain in a conducting state, so that the target capacitor is put into the target phase line at the next moment, or the target capacitor is cut off from the target phase line at the next moment. In the present application, the first switch unit in the target switching switch is the switch unit that last performed a conduction or disconnection action in the target switching switch. When the switch unit last performed a conduction action, the second switch unit is the switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; when the switch unit last performed a disconnection action, the second switch unit is the first switch unit. Compared with the prior art, the capacitor switching method of the present application can control different switch units in the target switching switch to switch the target capacitor in turn through a controller when the target capacitor is frequently switched, so as to evenly distribute the load of the frequent switching operation to each switch unit of the target switching switch, thereby reducing the operating frequency of a single switch unit, thereby effectively reducing the contact wear of a single switch unit, extending the electrical life of the target switching switch, and significantly improving the reliability of the intelligent capacitor device.

[0064] Next, some specific embodiments and drawings are used to describe in detail how the present application solves the above-mentioned problem that the electrical life of the switching switch is shortened and the reliability of the intelligent capacitor device is poor due to the contact wear of the switching switch during frequent switching operations.

[0065] Figure 1 A flow chart of a capacitor switching method provided in an embodiment of the present application. Figure 1 As shown, the capacitor switching method provided in the embodiment of the present application specifically includes S101 to S104, and S101 to S104 are described in detail below.

[0066] It should be noted that the capacitor switching method provided in the embodiment of the present application is applied to a smart capacitor device.

[0067] The intelligent capacitor device comprises a controller, a plurality of capacitors and a plurality of switching switches.

[0068] The capacitor is connected to one or more phase lines of the three-phase alternating current.

[0069] The switching switch includes a plurality of switch units connected in series, wherein the first switch unit connected in series is connected to the output end of a phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller.

[0070] Figure 2 This is a circuit principle block diagram of a smart capacitor device provided in an embodiment of the present application. Figure 2 As shown, in one embodiment of the present application, the smart capacitor device is a split-compensation capacitor device, and the smart capacitor device includes a controller 210 , three capacitors 220 , and three switching switches 230 .

[0071] It should be noted that the three capacitors 220 are connected in a Y-shaped manner. One end of the three capacitors 220 is connected to the neutral point, and the other end of each capacitor 220 is connected to a phase line of the three-phase alternating current 240, so that the three capacitors 220 form a "Y"-shaped structure.

[0072] In this embodiment, the three-phase AC power 240 is a three-phase four-wire AC power, and the three-phase AC power 240 includes three phase lines (A phase, B phase, and C phase) and a neutral line (N phase).

[0073] The three capacitors 220 correspond to the three switching switches 230 and the three phase lines of the three-phase alternating current 240 one by one, and each capacitor 220 is connected to its corresponding phase line through its corresponding switching switch 230 .

[0074] For each switching switch 230 , the first switch unit 2301 connected in series is connected to the output end of the phase line corresponding to the switching switch 230 , and the last switch unit 2301 connected in series is connected to the capacitor 220 corresponding to the switching switch 230 , and the control end of each switch unit 2301 in the switching switch 230 is connected to the controller 210 .

[0075] Figure 3 This is a circuit principle block diagram of another smart capacitor device provided in an embodiment of the present application. Figure 3 As shown, in another embodiment of the present application, the smart capacitor device is a co-complementary capacitor device, and the smart capacitor device includes a controller 310 , three capacitors 320 and two switching switches 330 .

[0076] It should be noted that the three capacitors 320 are connected in a delta connection. For each of the three capacitors 320, one end of the capacitor 320 is connected to one phase line of the three-phase alternating current 340, and the other end of the capacitor 320 is connected to another phase line of the three-phase alternating current 340, and the three capacitors 320 form a closed triangle structure between the three phase lines of the three-phase alternating current 340.

[0077] In this embodiment, the three-phase AC power 340 is a three-phase three-wire AC power, and the three-phase AC power 340 includes three phase lines (A phase, B phase, and C phase).

[0078] The three capacitors 320 are respectively a first capacitor, a second capacitor and a third capacitor; the two switching switches 330 are respectively a first switching switch and a second switching switch. One end of the first capacitor is connected to the output end of the A phase of the three-phase alternating current 340 through the first switching switch, and the other end of the first capacitor is connected to the output end of the B phase of the three-phase alternating current 340; one end of the second capacitor is connected to the output end of the B phase of the three-phase alternating current 340, and the other end of the second capacitor is connected to the output end of the C phase of the three-phase alternating current 340 through the second switching switch; one end of the third capacitor is connected to the output end of the C phase of the three-phase alternating current 340, and the other end of the third capacitor is connected to the output end of the A phase of the three-phase alternating current 340.

[0079] For the first switching switch, the first switch unit 3301 connected in series is connected to the output end of phase A of the three-phase alternating current 340, the last switch unit 2301 connected in series is connected to one end of the first capacitor, and the control end of each switch unit 3301 in the first switching switch is connected to the controller 310.

[0080] For the second switching switch, the first switch unit 3301 connected in series is connected to the output end of the C phase of the three-phase AC power 340, the last switch unit 2301 connected in series is connected to the other end of the second capacitor, and the control end of each switch unit 3301 in the second switching switch is connected to the controller 310.

[0081] In the above embodiment, it should be noted that the number of switch units in the switching switch can be manually set by the power system management personnel according to actual conditions, and this embodiment does not make any specific limitation on this.

[0082] For example, the switching switch includes 10 switching units connected in series.

[0083] Regardless of whether the smart capacitor device is a separate compensation capacitor device or a common compensation capacitor device, the capacitor switching method provided in the embodiment of the present application can be used to switch the capacitor in the smart capacitor device. The capacitor switching method provided in the embodiment of the present application is described in detail below.

[0084] It should be noted that the executor of the capacitor switching method provided in the embodiment of the present application is a controller in the smart capacitor device.

[0085] S101. A controller determines first state information of a target capacitor connected to a target phase line.

[0086] The target phase line is any phase line of the three-phase alternating current. The target capacitor is a capacitor in the intelligent capacitor device connected to the target phase line.

[0087] It should be noted that when the load of three-phase AC power is unbalanced and the intelligent capacitor device is a split compensation capacitor device, the controller needs to determine whether reactive compensation is required for one or more phase lines based on the power factor of the three phase lines of the three-phase AC power. By setting the target phase line to any phase line of the three-phase AC power, independent compensation for each phase line can be achieved, so that the intelligent capacitor device can flexibly adjust the input or removal state of the capacitor connected to different phase lines according to the power factor of different phase lines, thereby effectively balancing the load of the three-phase AC power, improving the power factor of the three-phase AC power, and optimizing the operating efficiency of the power grid.

[0088] It should be noted that when the load of three-phase AC is balanced and the intelligent capacitor device is a co-compensation capacitor device, the reactive power compensation requirements of the three phases of the three-phase AC are consistent. The controller only needs to determine whether reactive power compensation is required for the three phases of the three-phase AC at the same time based on the power factor of any phase of the three-phase AC. By setting the target phase line to any phase of the three-phase AC, the controller adjusts the input state or disconnection state of all capacitors connected to the three-phase AC by monitoring the power factor of any phase, which simplifies the control logic and ensures the reactive power compensation effect of the entire power grid.

[0089] The first state information is used to indicate a first state of the target capacitor at the current moment, and the first state is an on-state or a off-state.

[0090] It should be noted that the controller can detect the first voltage and the second voltage corresponding to the target switching switch at the current moment through the voltage detection module in the intelligent capacitor device, and determine the state of the target switching switch based on the first voltage and the second voltage corresponding to the target switching switch, and then determine the first state of the target capacitor based on the state of the target switching switch.

[0091] The target switching switch is a switching switch in the intelligent capacitor device that is connected to the target capacitor.

[0092] Specifically, the smart capacitor device also includes a plurality of voltage detection modules.

[0093] In some embodiments, when the smart capacitor device is a split-compensation capacitor device, the number of voltage detection modules is three, and the three voltage detection modules, three switching switches, three capacitors, and three phase lines of the three-phase alternating current correspond one to one.

[0094] In other embodiments, when the intelligent capacitor device is a common compensation capacitor device, the number of voltage detection modules is two, and the two voltage detection modules correspond one to one to the two switching switches, one of the two voltage detection modules corresponds to A of the three-phase alternating current, and the other voltage detection module corresponds to C of the three-phase alternating current.

[0095] In the above embodiment, whether the intelligent capacitor device is a separate compensation capacitor device or a common compensation capacitor device, for each voltage detection module, the first input end of the voltage detection module is connected to the output end of the phase line of the corresponding three-phase alternating current, the second input end of the voltage detection module is connected to the output end of the corresponding switching switch, and the first output end and the second output end of the voltage detection module are connected to the controller. The voltage detection module is used to detect the first voltage and the second voltage corresponding to the two ends of the corresponding switching switch.

[0096] When the first input end of the voltage detection module is connected to the output end of the phase line of the corresponding three-phase alternating current, the voltage detection module can detect the first voltage corresponding to one end of the corresponding switching switch; when the second output end of the voltage detection module is connected to the output end of the corresponding switching switch, the voltage detection module can detect the second voltage corresponding to the other end of the corresponding switching switch, and send the detected first voltage and second voltage to the controller, so that the controller can determine the state of each switching switch according to the first voltage and second voltage corresponding to each switching switch, and then determine the switching state of the capacitor corresponding to each switching switch.

[0097] The structure of the voltage detection module is an existing structure, and this embodiment will not be described in detail.

[0098] In this embodiment, for any switching switch, when the first voltage and the second voltage corresponding to the switching switch are equal, the switching switch is turned on, and the capacitor corresponding to the switching switch is in the switched-on state; when the first voltage and the second voltage corresponding to the switching switch are not equal, the switching switch is turned off, and the capacitor corresponding to the switching switch is in the cut-off state.

[0099] S102: The controller determines second state information of the target capacitor based on the power factor of the target phase line.

[0100] The controller may determine the power factor of the target phase line according to the phase current of the target phase line and the phase voltage or line voltage of the target phase line.

[0101] It should be noted that the method in which the controller determines the power factor of the target phase line based on the phase current of the target phase line and the phase voltage or line voltage of the target phase line is an existing method, which will not be described in detail in this embodiment.

[0102] The second state information is used to indicate a second state of the target capacitor at the next moment, and the second state is an on state or a off state.

[0103] The next moment is a moment after the current moment. The controller may determine the second state of the target capacitor at the next moment according to the power factor of the target phase line at the current moment.

[0104] It should be noted that when the power factor of the target phase line is less than the first preset power factor, it means that the reactive power demand of the target phase line is large and the reactive power compensation of the target phase line needs to be increased. Therefore, the second state of the target capacitor at the next moment is the input state.

[0105] When the power factor of the target phase line is greater than the second preset power factor, it indicates that the reactive power of the target phase line has been well compensated, and may even exceed the compensation requirement of the target phase line. Therefore, the second state of the target capacitor at the next moment is the cut-off state.

[0106] It should be noted that the first preset power factor is less than the second preset power factor. The first preset power factor and the second power factor can be manually set by power system management personnel according to actual conditions, and this embodiment does not specifically limit this.

[0107] For example, the first preset power factor is 0.95, and the second preset power factor is 0.98.

[0108] S103: When the second state is inconsistent with the first state, the controller determines the second switch unit in the target switching switch according to the first switch unit in the target switching switch.

[0109] It should be noted that, when the second state is consistent with the first state, there is no need to perform any switching operation on the target capacitor, and the target capacitor maintains the first state.

[0110] When the second state is inconsistent with the first state, it indicates that the controller needs to switch the state of the target capacitor at the next moment, and therefore, the controller needs to determine the second switch unit in the target switching switch.

[0111] The target switching switch is a switching switch connected to the target capacitor.

[0112] The target switching switch is used to control the connection and disconnection of the target capacitor and the target phase line. When the target switching switch is turned on, the target capacitor is connected to the target phase line and the target capacitor is in the on state; when the target switching switch is turned off, the target capacitor is disconnected from the target phase line and the target capacitor is in the off state.

[0113] It should be noted that, when the target switching switch is turned on, the multiple switch units included in the target switching switch are all kept in the turned-on state; when the target switching switch is turned off, one of the multiple switch units included in the target switching switch is turned off, and the other switch units are all kept in the turned-on state. That is, the controller can control the target switching switch to perform the on or off action by only controlling one switch unit in the target switching switch to perform the on or off action, thereby controlling the target capacitor to be turned on or off.

[0114] The first switch unit is the switch unit that last performed a turn-on or turn-off action in the target switching switch.

[0115] It should be noted that the first switch unit is a switch unit that performs a turn-on or turn-off action in the target switching switch when the target capacitor is switched on or off last time.

[0116] For example, the target switching switch includes three switch units connected in series, and the three switch units connected in series are switch unit S1, switch unit S2 and switch unit S3, respectively. Switch unit S1 is also connected to the output end of the target phase line, and switch unit S3 is also connected to the capacitor corresponding to the target switching switch. Before the last moment of the current moment, switch unit S1 is in the disconnected state, and switch unit S2 and switch unit S3 are both in the on state. At this time, the target capacitor is in the cut-off state; at the last moment, the target capacitor needs to be put into the target phase line, and the controller controls switch unit S1 to perform the on action to turn on the target switching switch, thereby putting the target capacitor into the target phase line. In this case, the first switch unit is switch unit S1.

[0117] Wherein, when the first switch unit performs the conduction action last time, the second switch unit is a switch unit adjacent to the first switch unit along the series direction, or the second switch unit is the first switch unit.

[0118] It should be noted that, when the first switch unit performs a turn-on action last time and the first switch unit is the last switch unit in the target switching switch, the second switch unit is the first switch unit in the target switching switch.

[0119] When the first switch unit performs a conduction action last time and the first switch unit is any switch unit except the last switch unit in the target switching switch, the second switch unit is a switch unit adjacent to the first switch unit in the series connection direction.

[0120] It should be noted that the series connection direction refers to the direction from the target phase line to the target capacitor.

[0121] For example, the target switching switch includes three switch units connected in series, and the three switch units connected in series are switch unit S1, switch unit S2 and switch unit S3, respectively. Switch unit S1 is also connected to the output end of the target phase line, and switch unit S3 is also connected to the capacitor corresponding to the target switching switch. Before the previous moment of the current moment, switch unit S2 is in the disconnected state, and switch unit S1 and switch unit S3 are both in the on state. At this time, the target capacitor is in the cut-off state; at the previous moment, the target capacitor needs to be put into the target phase line, and the controller controls switch unit S2 to perform the on action to turn on the target switching switch, thereby putting the target capacitor into the target phase line. In this case, the first switch unit is switch unit S2, and the second switch unit is switch unit S3 adjacent to switch unit S2 in the series direction.

[0122] For another example, the target switching switch includes three switch units connected in series, and the three switch units connected in series are switch unit S1, switch unit S2 and switch unit S3, respectively. Switch unit S1 is also connected to the output end of the target phase line, and switch unit S3 is also connected to the capacitor corresponding to the target switching switch. Before the last moment of the current moment, switch unit S3 is in the disconnected state, and switch unit S1 and switch unit S2 are both in the on state. At this time, the target capacitor is in the cut-off state; at the last moment, the target capacitor needs to be put into the target phase line, and the controller controls switch unit S3 to perform the on action to turn on the target switching switch, thereby putting the target capacitor into the target phase line. In this case, the first switch unit is switch unit S3, and the second switch unit is switch unit S1.

[0123] Wherein, when the first switch unit last performed a disconnection action, the second switch unit is the first switch unit.

[0124] It should be noted that each time the target capacitor is switched on and off, the controller can switch on and off the target capacitor by controlling only one switch unit in the target switching switch to perform a switch-on or switch-off action, and all switch units in the target switching switch except the switch unit that performs the switch-on or switch-off action remain in the on state.

[0125] S104. Based on the second state, the controller controls the second switch unit to perform an on or off action, and controls the other switch units in the target switching switch except the second switch unit to remain in the on state, so that the target capacitor is connected to the target phase line at the next moment, or the target capacitor is disconnected from the target phase line at the next moment.

[0126] It should be noted that, when the second state is the switched-on state, the controller controls the second switch unit to perform a conduction action to switch on the target switching switch, thereby switching the target capacitor on to the target phase line at the next moment.

[0127] When the second state is the cut-off state, the controller controls the second switch unit to perform a disconnection action, so that the target switching switch is disconnected, and then the target capacitor is disconnected from the target phase line at the next moment.

[0128] It should be noted that no matter whether the second switch unit performs the on-action or the off-action, the other switch units in the target switching switch except the second switch unit remain in the on state to ensure that the controller can control the switching of the target capacitor only by controlling the second switch unit, thereby effectively improving the switching efficiency of the target capacitor.

[0129] The embodiment of the present application provides a capacitor switching method, which is applied to an intelligent capacitor device. The intelligent capacitor device includes a controller, multiple capacitors and multiple switching switches, and each switching switch includes multiple switch units connected in series. In the switching method, first, the first state of the target capacitor connected to the target phase line at the current moment is determined; secondly, the second state of the target capacitor at the next moment is determined based on the power factor of the target phase line, and when the second state is inconsistent with the first state, the second switch unit in the target switching switch connected to the target capacitor is determined according to the first switch unit in the target switching switch; finally, based on the second state, the second single switch is controlled to perform a conduction or disconnection action, and the other switch units except the second switch unit in the target switching switch are controlled to remain in a conducting state, so that the target capacitor is put into the target phase line at the next moment, or the target capacitor is cut off from the target phase line at the next moment. In the present application, the first switch unit in the target switching switch is the switch unit that last performed a conduction or disconnection action in the target switching switch. When the switch unit last performed a conduction action, the second switch unit is the switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; when the switch unit last performed a disconnection action, the second switch unit is the first switch unit. Compared with the prior art, the capacitor switching method of the present application can control different switch units in the target switching switch to switch the target capacitor in turn through a controller when the target capacitor is frequently switched, so as to evenly distribute the load of the frequent switching operation to each switch unit of the target switching switch, thereby reducing the operating frequency of a single switch unit, thereby effectively reducing the contact wear of a single switch unit, extending the electrical life of the target switching switch, and significantly improving the reliability of the intelligent capacitor device.

[0130] In the above embodiment, the controller needs to determine the second state information of the target capacitor based on the power factor of the target phase line. Next, the specific process of the controller determining the second state information of the target capacitor based on the power factor of the target phase line is described in detail.

[0131] Figure 4A schematic diagram of another capacitor switching method provided in an embodiment of the present application. Figure 4 As shown, in a possible embodiment, the method steps shown in S102 above can be implemented by S1021 and S1022, and S1021 and S1022 are described in detail below.

[0132] S1021. The controller generates an action instruction related to the target capacitance based on the power factor of the target phase line.

[0133] The action instructions include a hold instruction, an input instruction or a cut instruction.

[0134] The holding instruction is used to keep the target capacitor in the first state at the next moment; that is, the holding instruction is used to indicate that the second state is the first state.

[0135] It should be noted that when the power factor of the target phase line is greater than or equal to the first preset power factor, and the power factor of the target phase line is less than or equal to the second preset power factor, it means that the state of the target capacitor has adapted to the requirements of the target phase line. Therefore, the controller generates a hold instruction to instruct the target switching switch to maintain the current state at the next moment, so that the target capacitor continues to maintain its first state at the current moment at the next moment.

[0136] The input instruction is used to make the target capacitor in the input state at the next moment.

[0137] It should be noted that when the power factor of the target phase line is less than the first preset power factor, it means that reactive compensation is required for the target phase line. Therefore, the controller generates an input instruction to instruct the target switching switch to be in the on state at the next moment, thereby making the target capacitor in the input state at the next moment.

[0138] The cut-off instruction is used to make the target capacitor in a cut-off state at the next moment.

[0139] It should be noted that when the power factor of the target phase line is greater than the second preset power factor, it means that the reactive power of the target phase line is excessive. Therefore, the controller generates a cut-off instruction to instruct the target switching switch to be in the disconnected state at the next moment, thereby making the target capacitor in the cut-off state at the next moment.

[0140] S1022: The controller determines second state information according to the action instruction.

[0141] The controller may determine the second state of the target capacitor at the next moment according to the action instruction.

[0142] When the first state is the input state and the action instruction includes a hold instruction, the second state is the input state; when the first state is the cut-off state and the action instruction includes a hold instruction, the second state is the cut-off state; when the action instruction includes an input instruction, the second state of the target capacitor is the input state; when the action instruction includes a cut-off instruction, the second state of the target capacitor is the cut-off state.

[0143] In an embodiment of the present application, the controller generates a hold instruction, an input instruction, or a cut-off instruction related to the target capacitor according to the change in the power factor of the target phase line, ensuring that the second state of the target capacitor matches the actual demand of the target phase line, optimizing the reactive compensation, and avoiding overcompensation or undercompensation.

[0144] In the above embodiment, the controller needs to determine whether the second state is consistent with the first state, and when the second state is inconsistent with the first state, the controller determines the second switch unit in the target switching switch according to the first switch unit in the target switching switch. Next, the specific process of the controller determining whether the second state is consistent with the first state is described in detail.

[0145] like Figure 4 As shown, before the method step shown in the above S103, the capacitor switching method further includes S10a1 to S10a3, and S10a1 to S10a3 are described in detail below.

[0146] S10a1: The controller determines whether the first state is a cut-off state.

[0147] It should be noted that the controller can detect the first voltage and the second voltage corresponding to the target switching switch at the current moment through the voltage detection module in the above embodiment to determine whether the target switching switch is turned on, and further determine whether the first state of the target capacitor is the cut-off state.

[0148] When the first voltage and the second voltage corresponding to the target switching switch at the current moment are not equal, the target switching switch is disconnected, and the first state of the target capacitor is the cut-off state; when the first voltage and the second voltage corresponding to the target switching switch at the current moment are equal, the target switching switch is turned on, and the first state of the target capacitor is the put-in state.

[0149] It should be noted that, when the controller determines that the first state is the cut-off state, the controller executes S10a2; when the controller determines that the first state is the input state, the controller executes S10a3.

[0150] S10a2: The controller determines whether the second state is a cut-off state.

[0151] It should be noted that the controller may determine the second state of the target capacitor according to the method shown in the above embodiment S1022, and this embodiment does not specifically limit this.

[0152] When the controller determines that the second state is the cut-off state, that is, the second state is consistent with the first state, there is no need to perform a switching operation on the target capacitor. At this time, the controller repeats the steps shown in the above embodiment S101 to achieve real-time detection of the target phase line, ensuring that the smart capacitor device responds to the reactive power compensation demand of the target phase line in a timely manner, thereby effectively improving the stability of the power system.

[0153] When the controller determines that the second state is the switched-on state, that is, the second state is inconsistent with the first state, the controller executes the steps shown in the above embodiment S103 to determine the second switch unit in the target switching switch.

[0154] S10a3: The controller determines whether the second state is the input state.

[0155] It should be noted that the controller may determine the second state of the target capacitor according to the method shown in the above embodiment S1022, and this embodiment does not specifically limit this.

[0156] When the controller determines that the second state is the switched-on state, that is, the second state is consistent with the first state, there is no need to switch the target capacitor. At this time, the controller repeats the steps shown in the above embodiment S101.

[0157] When the controller determines that the second state is the cut-off state, that is, the second state is inconsistent with the first state, the controller executes the method steps shown in the above embodiment S103 to determine the second switch unit in the target switching switch.

[0158] In the above embodiment, the controller needs to control the second switch unit to perform an on or off action based on the second state, and control the other switch units in the target switching switch except the second switch unit to remain in the on state. Next, the method executed by the controller when the first state is the on state and the second state is the off state is described in detail.

[0159] like Figure 4 As shown, in a possible embodiment, when the second state is inconsistent with the first state, and the first state is the input state, and the second state is the cut-off state, the method steps shown in the above S104 can be implemented by S1041, and S1041 is described in detail below.

[0160] S1041. The controller controls the second switch unit to perform a disconnection action based on the cut-off state, and controls the other switch units in the target switching switch except the second switch unit to remain in a conducting state, so that the target capacitor is disconnected from the target phase line at the next moment.

[0161] It should be noted that when the first state of the target capacitor is the on state, all switch units in the target switching switch remain in the on state. In order to make the second state of the target capacitor the off state, the controller only needs to control the second switch unit in the target switching switch to perform the off action at the next moment, and control all switch units in the target switching switch except the second switch unit to remain in the on state, so that the target switching switch can be disconnected at the first moment. When the target switching switch is disconnected, the target capacitor is disconnected from the target phase line, and the target capacitor is in the off state.

[0162] In an embodiment of the present application, when the second state is inconsistent with the first state, and the first state is the on state and the second state is the off state, the controller controls the second switch unit to perform the disconnection action, and controls the other switch units in the target switching switch except the second switch unit to remain in the on state, so that the target capacitor is disconnected from the target phase line at the next moment, thereby realizing the removal of the target capacitor, avoiding excessive compensation of the reactive power of the target phase line, and further avoiding the grid fluctuation or instability caused by excessive compensation of reactive power.

[0163] In the above embodiment, after the controller controls the second switch unit to perform a disconnection action based on the removal state, and controls the switch units other than the second switch unit in the target switching switch to remain in the on state, it is still necessary to determine whether the target capacitor is successfully removed. Next, the specific process of the controller determining whether the target capacitor is successfully removed is described in detail.

[0164] like Figure 4 As shown, in a possible embodiment, after the method shown in S1041 above, the capacitor switching method further includes S10b, and S10b is described in detail below.

[0165] S10b: The controller determines whether the target capacitor is successfully removed based on the first voltage and the second voltage corresponding to both ends of the target switching switch.

[0166] It should be noted that the method for the controller to obtain the first voltage and the second voltage respectively corresponding to the two ends of the target switching switch can refer to the method shown in the above S101, which will not be described in detail in this embodiment.

[0167] When the first voltage and the second voltage corresponding to the target switching switch are equal, it indicates that the target capacitor is still in the switched-on state, and the controller determines that the removal of the target capacitor has failed.

[0168] When the first voltage and the second voltage corresponding to the target switching switch are not equal, it indicates that the target capacitor is in a cut-off state, and the controller determines that the cut-off of the target capacitor is successful.

[0169] In an embodiment of the present application, the controller determines whether the target capacitor is successfully removed by detecting the first voltage and the second voltage at both ends of the target switching switch, so as to ensure that each step in the target capacitor switching process is effectively verified, thereby avoiding unnecessary losses caused by human operation or failure of the intelligent capacitor device.

[0170] In the above embodiment, the controller needs to determine whether the target capacitor is successfully removed based on the first voltage and the second voltage corresponding to both ends of the target switching switch. Next, the method executed by the controller after determining whether the target capacitor is successfully removed is described in detail.

[0171] like Figure 4 As shown, in a possible embodiment, when the controller determines that the target capacitor is removed successfully, after the method step shown in S10b above, the capacitor switching method further includes S10c1 and S10c2. S10c1 and S10c2 are described in detail below.

[0172] S10c1: When the target capacitor is removed successfully, the controller determines whether there is first identification information corresponding to the third switch unit in the fault record table.

[0173] The fault record table is a data table for storing the first identification information corresponding to the third switch unit in the target switching switch.

[0174] The third switch unit is a switch unit that cannot be disconnected in the target switching switch. Specifically, the third switch unit is a switch unit that cannot be normally disconnected due to contact adhesion in the target switching switch.

[0175] It should be noted that each switch unit corresponds to a unique identification information, and the identification information may be the serial number of the switch unit in the target switching switch, or may be other information, which is not specifically limited in this embodiment.

[0176] For example, the target switching switch includes three switch units connected in series, the three switch units connected in series are switch unit S1, switch unit S2 and switch unit S3, and the serial numbers of switch unit S1, switch unit S2 and switch unit S3 in the target switching switch are 1, 2 and 3 respectively according to the serial connection sequence. In the case where switch unit S2 is the third switch unit, the first identification information stored in the fault record table is 2.

[0177] It should be noted that, when the first identification information corresponding to the third switch unit does not exist in the fault record table, it means that all switch units in the target switching switch can work normally. At this time, the controller repeats the steps shown in the above embodiment S101 to realize real-time detection of the target phase line.

[0178] When the first identification information corresponding to the third switch unit exists in the fault record table, it indicates that a contact sticking fault occurs in the third switch unit in the target switching switch. At this time, the controller executes S10c2.

[0179] S10c2, the controller controls the intelligent capacitor device to stop working.

[0180] In this embodiment, when there is first identification information in the fault record table, that is, when there is a third switch unit in the target switching switch, the controller controls the smart capacitor device to stop working, thereby preventing the smart capacitor device from performing a switching operation again when there is a switch unit failure, thereby avoiding causing greater damage to the power system and the smart capacitor device.

[0181] like Figure 4 As shown, in a possible embodiment, when the controller determines that the target capacitor removal fails, after the method step shown in S10b above, the capacitor switching method further includes S10d1 to S10d4, and S10d1 to S10d4 are described in detail below.

[0182] S10d1: When the removal of the target capacitor fails, the controller determines whether there is first identification information corresponding to the third switch unit in the fault record table.

[0183] It should be noted that, when the target capacitor removal fails, the method for the controller to determine whether there is the first identification information corresponding to the third switch unit in the fault record table is the same as the method shown in S10c1 above, which will not be described in detail in this embodiment.

[0184] When the target capacitor fails to be removed and the first identification information does not exist in the fault record table, the controller executes the method steps shown in S10d2; when the target capacitor fails to be removed and the first identification information exists in the fault record table, the controller can directly execute the method steps shown in S10d3.

[0185] S10d2. When the controller does not have the first identification information in the fault record table, the controller uses the second identification information corresponding to the second switch unit as the first identification information, and regards the second switch unit as the first switch unit, and repeats the method steps shown in the above S103 until the target capacitor is successfully removed or the target capacitor fails to be removed again.

[0186] When the first identification information does not exist in the fault record table, it means that the second switch unit is the switch unit that has the first fault that cannot be disconnected in the target switching switch. Therefore, the controller stores the second identification information corresponding to the second switch unit as the first identification information in the fault record table; at the same time, the controller also regards the second switch unit as the first switch unit, and repeats the method steps shown in S103 above to determine a new second switch unit, and judge whether the target capacitor can be successfully removed through the new second switch unit.

[0187] It should be noted that, when the controller repeatedly executes the method steps shown in S103 and successfully removes the target capacitor through the new second switch unit, the controller executes the method steps shown in S10c1. When the controller repeatedly executes the method steps shown in S103 and fails to remove the target capacitor again through the new second switch unit, the controller executes the method steps shown in S10d3.

[0188] S10d3: When the target capacitor fails to be removed again and the first identification information exists in the fault record table, the controller determines whether the third identification information is the same as the first identification information.

[0189] The third identification information refers to the identification information corresponding to the new second switch unit determined in S10d2 above, that is, the third identification information is the identification information of the second switch unit corresponding to the target capacitor when the removal fails again.

[0190] It should be noted that, in the event that the target capacitor fails to be removed again, the controller needs to determine again whether the first identification information exists in the fault record table. Since the second identification information corresponding to the second switch unit has been stored as the first identification information in the fault record table in the above S10d2, therefore, in the method steps shown in S10d3, in the event that the target capacitor fails to be removed again, the first identification information must exist in the fault record table.

[0191] When the third identification information is different from the first identification information, the controller executes the method steps shown in S10d4.

[0192] S10d4. When the third identification information is different from the first identification information, the second switch unit corresponding to the target capacitor when the removal fails again is regarded as the first switch unit, and the method steps shown in the above S103 are repeatedly executed until the target capacitor is successfully removed, or the third identification information is the same as the first identification information.

[0193] It should be noted that, when the controller repeatedly executes the method steps shown in S103 above and successfully removes the target capacitor, the controller executes the method steps shown in S10c1 above. When the controller repeatedly executes the method steps shown in S103 above, and the third identification information is the same as the first identification information, it means that the controller has controlled each switch unit in the target switching switch to perform a disconnection operation, and each switch unit has a contact adhesion failure and cannot be successfully disconnected. In this case, the controller can determine that the target capacitor cannot be successfully removed through the target switching switch, and the controller executes the method steps shown in S10c2 above.

[0194] In this embodiment, by judging whether the third identification information is the same as the first identification information, it is determined whether to continue to regard the second switch unit as the first switch unit and repeat the method steps shown in the above S103. In the case where the third identification information is different from the first identification information, the second switch unit is continued to be regarded as the first switch unit and the method steps shown in the above S103 are repeated, so that the controller determines whether all the switch units of the target switching switch have all had contact adhesion failures; in the case where there are switch units in the target switching switch that have not had contact adhesion failures, the controller can also successfully remove the target capacitor. In the case where the third identification information is the same as the first identification information, the controller can determine that all the switch units of the target switching switch have had contact adhesion failures, and the controller no longer repeats the method steps shown in the above S103 to avoid continuing to repeat invalid operations.

[0195] In the above embodiment, when the first identification information does not exist in the fault record table, the controller also needs to send the first alarm information to the monitoring computer; when the third identification information is the same as the first identification information, the controller also needs to send the second alarm information to the monitoring computer. Next, the specific contents of the first alarm information and the second alarm information are described in detail.

[0196] like Figure 4 As shown, in a possible embodiment, after the method step shown in S10d2 above, the capacitor switching method further includes S10e, and S10e is described in detail below.

[0197] S10e: The controller sends a first alarm message.

[0198] In the smart capacitor device provided in the present application, the controller is also connected to the monitoring computer through a communication module, so that the controller can upload relevant data to the monitoring computer for remote monitoring; in addition, the monitoring computer can also send relevant instructions to the controller through the communication module to facilitate remote management.

[0199] The first alarm information is used to indicate that the second switch unit cannot be disconnected.

[0200] In this embodiment, when the controller controls the second switch unit to perform a disconnection action to cut off the target capacitance, and the target capacitance removal fails, and the first identification information does not exist in the fault record table, the controller sends a first alarm message to the monitoring computer to promptly inform the monitoring personnel that the second switch unit has a contact adhesion failure and cannot be disconnected.

[0201] When the third identification information is the same as the first identification information, the capacitor switching method further includes S10f, which is described in detail below.

[0202] S10f. The controller sends a second alarm message.

[0203] The second alarm information is used to indicate that a removal failure occurs in the intelligent capacitor device.

[0204] In this embodiment, the controller sends a second alarm message to the monitoring computer when the third identification information is the same as the first identification information, so as to report the problem to the monitoring computer in a timely manner when a fault occurs in the smart capacitor device, thereby providing important reference information for subsequent maintenance and troubleshooting of the smart capacitor device, thereby improving the operation and maintenance efficiency and safety of the smart capacitor device.

[0205] In the above embodiment, the controller needs to control the second switch unit to perform an on or off action based on the second state, and control the other switch units in the target switching switch except the second switch unit to remain in the on state. Next, the method executed by the controller when the first state is the cut-off state and the second state is the put-in state is described in detail.

[0206] like Figure 4 As shown, in a possible embodiment, when the second state is inconsistent with the first state, and the first state is the cut-off state, and the second state is the input state, the method shown in S104 above can be implemented by S1042, and S1042 is described in detail below.

[0207] S1042: The controller controls the second switch unit to perform a conduction action based on the input state, and controls the other switch units in the target switching switch except the second switch unit to maintain the conduction state, so that the target capacitor is connected to the target phase line at the next moment.

[0208] It should be noted that when the first state of the target capacitor is the cut-off state, the first switch unit in the target switching switch is disconnected, and the switch units other than the first switch unit in the target switching switch remain in the on state. In order to make the second state of the target capacitor the on state, the controller controls the first switch unit (the second switch unit) to perform the on action at the next moment, and controls the switch units other than the second switch unit in the target switching switch to remain in the on state. At this time, all switch units in the target switching switch remain in the on state, and the target switching switch is turned on. When the target switching switch is turned on, the target capacitor is connected to the target phase line, and the target capacitor is in the on state.

[0209] In an embodiment of the present application, when the second state is inconsistent with the first state, and the first state is a cut-off state and the second state is an input state, the controller controls the second switch unit in the target switching switch to perform a conduction action, and controls the other switch units in the target switching switch except the second switch unit to remain in the on state, so that all switch units in the target switching switch remain in the on state, and then the target capacitor is connected to the target phase line at the next moment, thereby realizing the input of the target capacitor.

[0210] In the above embodiment, after the controller controls the second switch unit to perform the conduction action based on the input state, and controls the switch units other than the second switch unit in the target switching switch to maintain the conduction state, it is still necessary to determine whether the target capacitor is successfully input. Next, the specific process of the controller determining whether the target capacitor is successfully input is described in detail.

[0211] like Figure 4 As shown, in a possible embodiment, after the method shown in S1042 above, the capacitor switching method further includes S10g1 and S10g2, and S10g1 and S10g2 are described in detail below.

[0212] S10g1. The controller determines whether the target capacitor is successfully switched on based on the first voltage and the second voltage corresponding to both ends of the target switching switch.

[0213] It should be noted that the method for the controller to obtain the first voltage and the second voltage respectively corresponding to the two ends of the target switching switch can refer to the method shown in the above S101, which will not be described in detail in this embodiment.

[0214] When the first voltage and the second voltage corresponding to the target switching switch are equal, it indicates that the target capacitor is in the switched-on state, and the controller determines that the target capacitor is successfully switched-on. When the controller determines that the target capacitor is successfully switched-on, the controller repeatedly executes the steps shown in the above embodiment S101 to achieve real-time detection of the target phase line.

[0215] When the first voltage and the second voltage corresponding to the target switching switch are not equal, it indicates that the target capacitor is still in the cut-off state, and the controller determines that the target capacitor fails to be switched on. When the controller determines that the target capacitor fails to be switched on, the controller executes S10g2.

[0216] S10g2: When the target capacitor fails to be put into operation, the controller sends a third alarm message.

[0217] The third alarm information is used to indicate that a failure has occurred in the intelligent capacitor device.

[0218] It should be noted that in the event of a failure in the target capacitor being put into operation, the controller sends a third alarm message to the monitoring computer, which can promptly report the problem to the monitoring computer when a failure occurs in the smart capacitor device, providing important reference information for subsequent maintenance and troubleshooting of the smart capacitor device, thereby improving the operation and maintenance efficiency and safety of the smart capacitor device.

[0219] In this embodiment, the controller determines whether the target capacitor is successfully switched on by detecting the first voltage and the second voltage across the target switching switch, so as to ensure that each step in the switching process of the target capacitor is effectively verified, thereby avoiding unnecessary losses caused by human operation or failure of the intelligent capacitor device.

[0220] An embodiment of the present application provides a smart capacitor device, which includes a controller, multiple capacitors, and multiple switching switches.

[0221] The capacitor is connected to one or more phase lines of the three-phase alternating current.

[0222] The switching switch includes a plurality of switch units connected in series, wherein the first switch unit connected in series is connected to the output end of a phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller.

[0223] The controller is used to execute the operations performed by the controller in the above method embodiment.

[0224] It should be noted that the structures of the controller, multiple capacitors and multiple switching switches included in the intelligent capacitor device have been described in detail in the above method embodiment, and will not be repeated here for the sake of brevity.

[0225] Figure 5 This is a schematic diagram of the structure of a capacitor switching device provided in an embodiment of the present application. Figure 5 As shown, the capacitor switching device 500 provided in this embodiment can exist independently and be used to implement the operations corresponding to the controller in the above method embodiment.

[0226] The capacitor switching device 500 may include: a transceiver module 501 and a processing module 502. The processing module 502 is used for data processing, and the transceiver module 501 may implement corresponding communication functions. The transceiver module 501 may also be called a communication interface or a communication unit.

[0227] Optionally, the capacitor switching device 500 may further include a storage unit, which may be used to store instructions and / or data. The processing module 502 may read the instructions and / or data in the storage unit so that the capacitor switching device 500 implements the steps implemented by the controller in the aforementioned method embodiment.

[0228] The transceiver module 501 is used to execute the reception-related operations of the controller in the foregoing method embodiment, and the processing module 502 is used to execute the processing-related operations of the controller in the foregoing method embodiment.

[0229] Optionally, the transceiver module 501 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.

[0230] It should be noted that the capacitor switching device 500 may include a sending module but not a receiving module. Alternatively, the capacitor switching device 500 may include a receiving module but not a sending module. Specifically, it depends on whether the above solution executed by the capacitor switching device 500 includes a sending action and a receiving action.

[0231] As an example, the capacitor switching device 500 is used to perform the above Figure 1 Actions performed by the controller in the illustrated embodiment.

[0232] The capacitor switching device 500 may include: a transceiver module 501 and a processing module 502 .

[0233] Processing module 502 is used to determine the first state information of the target capacitor connected to the target phase line; wherein the target phase line is any phase line of the three-phase alternating current; the first state information is used to indicate the first state of the target capacitor at the current moment, and the first state is the input state or the disconnected state.

[0234] The processing module 502 is further used to determine the second state information of the target capacitor based on the power factor of the target phase line; wherein the second state information is used to indicate the second state of the target capacitor at the next moment, and the second state is the switched-on state or the switched-off state.

[0235] The processing module 502 is also used to determine the second switch unit in the target switching switch according to the first switch unit in the target switching switch when the second state is inconsistent with the first state; the target switching switch is the switching switch connected to the target capacitor; the first switch unit is the switch unit in the target switching switch that last performed a conduction or disconnection action; when the first switch unit last performed a conduction action, the second switch unit is the switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; when the first switch unit last performed a disconnection action, the second switch unit is the first switch unit.

[0236] The processing module 502 controls the second switch unit to perform an on or off action based on the second state, and controls the other switch units in the target switching switch except the second switch unit to remain in the on state, so that the target capacitor is connected to the target phase line at the next moment, or the target capacitor is disconnected from the target phase line at the next moment.

[0237] It should be understood that the execution of the above corresponding processes by each module has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0238] The processing module 502 in the above embodiment can be implemented by at least one processor or processor-related circuit. The transceiver module 501 can be implemented by a transceiver or a transceiver-related circuit. The transceiver module 501 can also be called a communication unit or a communication interface. The storage unit can be implemented by at least one memory.

[0239] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the electronic device 600 provided in this embodiment includes: a memory 601 and a processor 602 .

[0240] The memory 601 may be an independent physical unit, and may be connected to the processor 602 via a bus 603. The memory 601 and the processor 602 may also be integrated together and implemented by hardware. The memory 601 is used to store program instructions, and the processor 602 calls the program instructions to execute the operations executed by the controller in any of the above method embodiments.

[0241] Optionally, when part or all of the methods of the above embodiments are implemented by software, the electronic device 600 may also include only a processor 602. The memory 601 for storing programs is located outside the electronic device 600, and the processor 602 is connected to the memory through circuits / wires to read and execute the programs stored in the memory. The processor 602 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP. The processor 602 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.

[0242] The memory 601 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.

[0243] Exemplarily, 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 controller in the above method embodiment.

[0244] 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 executes the operations performed by the controller in the above method embodiment.

[0245] 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 controller in the above method embodiment.

[0246] 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 capacitor switching method, characterized in that: The method is applied to an intelligent capacitor device, which includes a controller, a plurality of capacitors and a plurality of switching switches; the capacitors are connected to one or more phase lines of a three-phase alternating current; the switching switches include a plurality of switch units connected in series, the first switch unit connected in series is connected to an output end of one phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller; The method comprises: Determine first state information of a target capacitor connected to a target phase line; wherein the target phase line is any phase line of the three-phase alternating current; the first state information is used to indicate a first state of the target capacitor at a current moment, the first state being an on-state or a off-state; Determine the second state information of the target capacitor based on the power factor of the target phase line; wherein the second state information is used to indicate the second state of the target capacitor at the next moment, and the second state is an input state or a disconnected state; In the case where the second state is inconsistent with the first state, the second switch unit in the target switching switch is determined according to the first switch unit in the target switching switch; the target switching switch is the switching switch connected to the target capacitor; the first switch unit is the switch unit that last performed a conduction or disconnection action in the target switching switch; in the case where the first switch unit last performed a conduction action, the second switch unit is a switch unit adjacent to the first switch unit in the series direction, or the second switch unit is the first switch unit; in the case where the first switch unit last performed a disconnection action, the second switch unit is the first switch unit; Based on the second state, the second switch unit is controlled to perform an on or off action, and the other switch units in the target switching switch except the second switch unit are controlled to remain in the on state, so that the target capacitor is connected to the target phase line at the next moment, or the target capacitor is disconnected from the target phase line at the next moment.

2. The method according to claim 1, characterized in that The determining, based on the power factor of the target phase line, second state information of the target capacitor includes: Based on the power factor of the target phase line, an action instruction related to the target capacitor is generated; wherein the action instruction includes a holding instruction, an input instruction or a removal instruction; the holding instruction is used to make the target capacitor maintain the first state at the next moment; the input instruction is used to make the target capacitor be in the input state at the next moment; the removal instruction is used to make the target capacitor be in the removal state at the next moment; The second state information is determined according to the action instruction.

3. The method according to claim 1, characterized in that In the case where the first state is the switched-on state and the second state is the switched-off state, based on the second state, controlling the second switch unit to perform a switching-on or switching-off action, and controlling the other switch units in the target switching switch except the second switch unit to maintain a switching-on state, includes: Based on the cut-off state, the second switch unit is controlled to perform a disconnection action, and the other switch units except the second switch unit in the target switching switch are controlled to remain in a conductive state, so that the target capacitor is disconnected from the target phase line at the next moment.

4. The method according to claim 3, characterized in that After controlling the second switch unit to perform a disconnection action based on the cut-off state, and controlling the other switch units in the target switching switch except the second switch unit to maintain a conducting state, the method further includes: Based on the first voltage and the second voltage respectively corresponding to both ends of the target switching switch, it is determined whether the target capacitor is successfully removed.

5. The method according to claim 4, characterized in that After judging whether the target capacitor is successfully removed based on the first voltage and the second voltage respectively corresponding to both ends of the target switching switch, the method further includes: In the case where the target capacitor fails to be removed, determining whether there is first identification information corresponding to the third switch unit in the fault record table; wherein the third switch unit is the switch unit that cannot be disconnected in the target switching switch; If the first identification information does not exist in the fault record table, the second identification information corresponding to the second switch unit is used as the first identification information, and the second switch unit is regarded as the first switch unit, and the step of determining the second switch unit in the target switching switch according to the first switch unit in the target switching switch is repeatedly performed until the target capacitor is successfully removed or the target capacitor fails to be removed again; When the target capacitor fails to be removed again and the first identification information exists in the fault record table, determining whether the third identification information is the same as the first identification information; wherein the third identification information is the identification information of the second switch unit corresponding to the target capacitor failing to be removed again; When the third identification information is different from the first identification information, the second switch unit corresponding to the failure of the target capacitor to be removed again is regarded as the first switch unit, and the steps of determining the second switch unit in the target switching switch according to the first switch unit in the target switching switch are repeated until the target capacitor is successfully removed, or the third identification information is the same as the first identification information.

6. The method according to claim 5, characterized in that When the first identification information does not exist in the fault record table, the method further includes: Sending a first alarm message; wherein the first alarm message is used to indicate that the second switch unit cannot be disconnected; When the third identification information is the same as the first identification information, the method further includes: Send a second alarm message; wherein the second alarm message is used to indicate that a removal fault occurs in the smart capacitor device.

7. The method according to claim 1, characterized in that In the case where the first state is the cut-off state and the second state is the put-in state, based on the second state, controlling the second switch unit to perform an on or off action, and controlling the other switch units in the target switching switch except the second switch unit to maintain an on state, includes: Based on the input state, the second switch unit is controlled to perform a conduction action, and other switch units except the second switch unit in the target switching switch are controlled to maintain a conduction state, so that the target capacitor is input into the target phase line at the next moment.

8. The method according to claim 7, characterized in that After controlling the second switch unit to perform a conduction action based on the input state, and controlling the other switch units in the target switching switch except the second switch unit to maintain a conduction state, the method further includes: Based on the first voltage and the second voltage respectively corresponding to the two ends of the target capacitor, judging whether the target capacitor is successfully invested; In the case where the target capacitor fails to be put into operation, a third alarm message is sent; wherein the third alarm message is used to indicate that a failure has occurred in the intelligent capacitor device.

9. A smart capacitor device, characterized in that: The intelligent capacitor device includes a controller, a plurality of capacitors and a plurality of switching switches; The capacitor is connected to one or more phase lines of three-phase alternating current; The switching switch comprises a plurality of switch units connected in series, wherein the first switch unit connected in series is connected to the output end of one phase line of the three-phase alternating current, the last switch unit connected in series is connected to one or more capacitors, and the control end of the switch unit is connected to the controller; Wherein, the controller is used to execute the capacitor switching method described in any one of claims 1 to 8.

10. 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 capacitor switching method according to any one of claims 1 to 8.

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