Solid-state circuit breaker device and reclosing control method

Abstract

The invention provides a solid-state circuit breaker device and a reclosing control method, and relates to the technical field of low-voltage electric appliances. The device comprises an isolating switch, an electronic switch, an opening and closing operation mechanism, a control unit, a metering unit, a driving unit and a current sampling assembly, the isolating switch is connected with a preset power supply, connected with the control unit through the opening and closing operation mechanism and connected with the electronic switch through the current sampling assembly, and the current acquisition end of the metering unit is connected with the output end of the current sampling assembly. The voltage acquisition end of the metering unit is connected to the output end of the isolating switch and the output end of the electronic switch, the output end of the metering unit is connected with the control unit, the control unit is connected with the electronic switch through the driving unit, and the output end of the electronic switch is used for being connected with an external load. The control unit is used for determining the fault type according to the current data, the voltage data or the temperature data collected by the metering unit, and judging whether the isolation switch and the electronic switch meet the switching-on condition or not through the control unit.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and in particular to a solid-state circuit breaker device and a reclosing control method. Background Art

[0002] Circuit breakers are common circuit protection devices. In the event of a circuit fault (such as undervoltage, loss of voltage, short circuit, overload, etc.), the circuit breaker will automatically disconnect, causing the load circuit to be de-energized, thereby achieving the protection function. In addition, some circuit breakers also have an automatic reclosing function, that is, when a line fault occurs and the circuit breaker trips, the automatic reclosing device will reclose the circuit breaker after a short time interval.

[0003] At present, in most cases, traditional mechanical circuit breakers automatically trip due to instantaneous overload or protective power failure. If they are successfully reclosed, the reliability of power supply in the power system can be improved. However, for permanent faults, the short-circuit fault still exists after the automatic reclosing device is activated, and it is very likely that the downstream electrical equipment will be short-circuited and burned when the circuit breaker is closed.

[0004] Therefore, the present application provides a solid-state circuit breaker that combines mechanics and electronics, which can open and close the solid-state circuit breaker in real time, quickly and continuously to avoid burning down lower-level equipment. Summary of the invention

[0005] The object of the present invention is to provide a solid-state circuit breaker device and a reclosing control method to address the deficiencies in the above-mentioned prior art, so as to open and close the solid-state circuit breaker in real time, quickly and continuously to avoid burning down the lower-level equipment.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] In a first aspect, an embodiment of the present application provides a solid-state circuit breaker device, comprising: an isolating switch, an electronic switch, an opening and closing operating mechanism, a control unit, a metering unit, a driving unit, and a current sampling component; wherein the input end of the isolating switch is connected to a preset power supply, the control end of the isolating switch is connected to the control unit through the opening and closing operating mechanism, and the output end of the isolating switch is connected to the electronic switch through the current sampling component;

[0008] The current collection end of the metering unit is connected to the output end of the current sampling component, one end of the voltage collection end of the metering unit is connected to the output end of the isolation switch, the other end of the voltage collection end of the metering unit is connected to the output end of the electronic switch, and the output end of the metering unit is connected to the control unit;

[0009] The control unit is connected to the control end of the electronic switch through the driving unit, and the output end of the electronic switch is used to connect an external load;

[0010] The control unit is used to determine the fault type according to the current data, voltage data or temperature data collected by the metering unit, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions.

[0011] In an optional embodiment, the opening and closing operating mechanism comprises: an opening operating mechanism and a closing operating mechanism, one end of the opening operating mechanism is connected to the disconnector, and a control end of the opening operating mechanism is connected to the control unit;

[0012] One end of the closing operating mechanism is connected to the isolating switch, and a control end of the closing operating mechanism is connected to the control unit.

[0013] In a second aspect, an embodiment of the present application provides a reclosing control method, which is applied to a control unit in the solid-state circuit breaker device described in the first aspect, and the method includes:

[0014] If the electronic switch is opened, or both the electronic switch and the isolating switch are opened, quickly acquiring the current data, voltage data or temperature data collected by the metering unit;

[0015] The fault type is determined according to the current data, the voltage data, the temperature data and a preset threshold, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet a closing condition.

[0016] In an optional implementation manner, before determining the fault type according to the current data, the voltage data, the temperature data and the preset threshold, the method further includes:

[0017] If the isolating switch is open, the isolating switch is closed by controlling the opening and closing operating mechanism.

[0018] In an optional implementation manner, after determining the fault type according to the current data, the voltage data, the temperature data and the preset threshold, the method further includes:

[0019] If the current mode is to allow automatic closing, then detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met;

[0020] If the current mode is not allowing automatic closing, information about the fault type is sent to the remote terminal.

[0021] In an optional implementation manner, if the current mode is to allow automatic closing, detecting whether the fault is eliminated according to the fault type and determining whether the closing condition is met includes:

[0022] If the fault type is a first type of fault, detecting whether the first type of fault is eliminated, wherein the first type of fault includes: an overload fault and a short circuit fault;

[0023] If the first type of fault is eliminated, the first type of fault is determined to be a transient fault, and whether to execute closing is determined according to preset conditions;

[0024] If the preset condition indicates automatic closing, control the electronic switch to perform a closing operation, and send a closing success message to the remote terminal; or, if the preset condition does not allow automatic closing, send a closing condition indication message to the remote terminal;

[0025] If the first type of fault is not eliminated, the first type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal.

[0026] In an optional implementation manner, if the fault type is a first type of fault, detecting whether the first type of fault is eliminated includes:

[0027] Transmitting a preset pulse to the electronic switch to quickly obtain the current data and voltage data collected by the metering unit;

[0028] Whether the first type of fault is eliminated is determined based on the current data, voltage data collected by the metering unit and the preset threshold.

[0029] In an optional implementation manner, the first type of fault is an overload fault, the preset threshold includes a first preset threshold, and judging whether the first type of fault is eliminated according to the acquired current data, voltage data collected by the metering unit and the preset threshold includes:

[0030] If the current data collected by the metering unit is less than the first preset threshold, it is determined that the first type of fault is eliminated and the first type of fault is determined to be a transient fault;

[0031] If the current data collected by the metering unit is greater than or equal to the first preset threshold, it is determined that the first type of fault has not been eliminated, the first type of fault is determined to be a permanent fault, and the isolating switch is controlled to restore to an initial state, wherein the initial state indicates the state of the isolating switch before the fault type is determined.

[0032] In an optional implementation manner, the first type of fault is a short circuit fault, the preset threshold includes a second preset threshold, and judging whether the first type of fault is eliminated according to the acquired current data, voltage data collected by the metering unit and the preset threshold includes:

[0033] If the output voltage data collected by the metering unit is equal to the input voltage data, and the current data collected by the metering unit is less than the second preset threshold, it is determined that the first type of fault is eliminated and the first type of fault is determined to be a transient fault;

[0034] If the output voltage data collected by the metering unit is less than the input voltage data, and / or the current data collected by the metering unit is greater than or equal to the second preset threshold, it is determined that the first type of fault has not been eliminated and the first type of fault is determined to be a permanent fault.

[0035] In an optional implementation manner, if the current mode is to allow automatic closing, detecting whether the fault is eliminated according to the fault type and determining whether the closing condition is met includes:

[0036] If the fault type is a second type of fault, the second type of fault is determined to be a staged fault, and whether the second type of fault is eliminated is detected, wherein the second type of fault includes: a high temperature fault, an overvoltage fault, and an undervoltage fault;

[0037] If the second type of fault is eliminated, whether to close the circuit breaker is determined according to the preset conditions;

[0038] If the preset condition indicates automatic closing, control the electronic switch to perform a closing operation, and send a closing success message to the remote terminal; or, if the preset condition does not allow automatic closing, send a closing condition indication message to the remote terminal;

[0039] If the second type of fault is not eliminated, the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolation switch is controlled to return to an initial state, wherein the initial state indicates the state of the isolation switch before the fault type is determined.

[0040] In an optional implementation manner, if the fault type is a second type of fault, determining that the second type of fault is a staged fault, and detecting whether the second type of fault is eliminated includes:

[0041] Acquire the current data, voltage data and temperature data collected by the metering unit according to a preset time interval;

[0042] Whether the second type of fault is eliminated is determined based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold.

[0043] In an optional implementation manner, the second type of fault is an overvoltage fault, the preset threshold includes a third preset threshold and a fourth preset threshold, and judging whether the second type of fault is eliminated according to the current data, voltage data, temperature data collected by the metering unit and the preset threshold, includes:

[0044] If the voltage data collected by the metering unit is less than or equal to the third preset threshold, the second type of fault is judged to be a staged fault, and whether the voltage data collected by the metering unit is restored to the fourth preset threshold is detected. If the voltage data collected by the metering unit is restored to the fourth preset threshold, it is judged that the second type of fault is eliminated;

[0047] If the voltage data collected by the metering unit is greater than the third preset threshold, it is determined that the second type of fault has not been eliminated, and the second type of fault is determined to be a permanent fault;

[0048] If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

[0049] In an optional implementation manner, the second type of fault is an undervoltage fault, the preset threshold includes a fifth preset threshold, and judging whether the second type of fault is eliminated based on the acquired current data, voltage data, temperature data collected by the metering unit and the preset threshold includes:

[0050] determining that the second type of fault is a stage fault, and if the voltage data collected by the metering unit is restored to the fifth preset threshold, determining that the second type of fault is eliminated;

[0051] If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

[0052] In an optional implementation manner, the second type of fault is a high temperature fault, the preset threshold includes a sixth preset threshold, and judging whether the second type of fault is eliminated based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold, includes:

[0053] determining that the second type of fault is a stage fault, and if the temperature data collected by the metering unit is restored to the sixth preset threshold, determining that the second type of fault is eliminated;

[0054] If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

[0055] In an optional implementation manner, if the current automatic closing mode is not allowed, after sending the information of the fault type to the remote terminal, the method further includes:

[0056] receiving a fault inspection indication sent by the remote terminal;

[0057] After receiving the fault inspection indication, detecting whether the fault elimination is judged to be completed;

[0058] If the fault elimination is judged to be complete, the electronic switch is controlled to close;

[0059] If the fault elimination judgment is not completed, it is detected whether the fault is eliminated according to the fault type, and whether the closing conditions are met.

[0060] In an optional implementation manner, after receiving the fault inspection indication sent by the remote terminal, the method further includes:

[0062] Obtaining the tripping reason according to the fault inspection indication;

[0063] If the tripping reason is a fault tripping, then detecting whether the fault elimination is completed;

[0064] If the tripping reason is not a fault tripping, the electronic switch is controlled to close.

[0065] The beneficial effects of this application are:

[0066] The embodiment of the present application provides a solid-state circuit breaker device and a reclosing control method, wherein the solid-state circuit breaker device includes: an isolating switch, an electronic switch, an opening and closing operating mechanism, a control unit, a metering unit, a driving unit and a current sampling component; wherein the input end of the isolating switch is connected to a preset power supply, the control end of the isolating switch is connected to the control unit through the opening and closing operating mechanism, and the output end of the isolating switch is connected to the electronic switch through the current sampling component; the current collection end of the metering unit is connected to the output end of the current sampling component, one end of the voltage collection end of the metering unit is connected to the output end of the isolating switch, the other end of the voltage collection end of the metering unit is connected to the output end of the electronic switch, and the output end of the metering unit is connected to the control unit; the control unit is connected to the control end of the electronic switch through the driving unit, and the output end of the electronic switch is used to connect an external load; the control unit is used to determine the fault type according to the current data, voltage data or temperature data collected by the metering unit, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions. In the solid-state circuit breaker device provided in the present application, the isolating switch and the electronic switch are combined, and a quick judgment of the fault type is achieved through a control unit to facilitate determination of whether the isolating switch and the electronic switch meet the closing conditions, thereby avoiding the situation where the isolating switch and the electronic switch do not meet the closing conditions but the isolating switch and the electronic switch are closed, thereby ensuring normal use of the solid-state circuit breaker and the external load. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0068] Figure 1 A schematic structural diagram of a solid-state circuit breaker device provided in an embodiment of the present application;

[0069] Figure 2 A structural schematic diagram of another solid-state circuit breaker device provided in an embodiment of the present application;

[0070] Figure 3 One of the flow charts of a reclosing control method provided in an embodiment of the present application;

[0071] Figure 4 A second flow chart of a reclosing control method provided in an embodiment of the present application;

[0072] Figure 5 A third flow chart of a reclosing control method provided in an embodiment of the present application;

[0073] Figure 6 A fourth flow chart of a reclosing control method provided in an embodiment of the present application;

[0074] Figure 7 A fifth flow chart of a reclosing control method provided in an embodiment of the present application;

[0075] Figure 8 A sixth flow chart of a reclosing control method provided in an embodiment of the present application;

[0076] Fig. 9 A seventh flow chart of a reclosing control method provided in an embodiment of the present application;

[0077] Fig.10 FIG8 is a flow chart of a reclosing control method provided in an embodiment of the present application;

[0078] Fig.11 A ninth flowchart of a reclosing control method provided in an embodiment of the present application;

[0079] Fig.12 The tenth flowchart of a reclosing control method provided in an embodiment of the present application.

[0080] Explanation of the main component symbols: 110-isolating switch; 120-electronic switch; 130-opening and closing operating mechanism; 131-closing operating mechanism; 132-opening operating mechanism; 140-control unit; 150-metering unit; 160-driving unit; D-current sampling component. DETAILED DESCRIPTION

[0081] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0082] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0083] In the description of the present application, it should be noted that if the terms "upper", "lower", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0084] In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0085] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0086] The solid-state circuit breaker device provided in the present application is specifically described below through multiple examples in conjunction with the accompanying drawings.

[0087] Figure 1This is a schematic diagram of the structure of a solid-state circuit breaker device provided in an embodiment of the present application. Figure 1 As shown, the device includes: an isolating switch 110, an electronic switch 120, an opening and closing operating mechanism 130, a control unit 140, a metering unit 150, a driving unit 160 and a current sampling component D; wherein, the input end of the isolating switch 110 is connected to a preset power supply, the control end of the isolating switch 110 is connected to the control unit 140 through the opening and closing operating mechanism 130, and the output end of the isolating switch 110 is connected to the electronic switch 120 through the current sampling component D.

[0088] The current collection end of the metering unit 150 is connected to the output end of the current sampling component D, one end of the voltage collection end of the metering unit 150 is connected to the output end of the isolation switch 110, the other end of the voltage collection end of the metering unit 150 is connected to the output end of the electronic switch 120, and the output end of the metering unit 150 is connected to the control unit 140.

[0089] The control unit 140 is connected to the control end of the electronic switch 120 through the driving unit 160 , and the output end of the electronic switch 120 is used to connect to an external load.

[0090] In this embodiment, the isolating switch 110 is a mechanical switch used to connect or disconnect the main circuit current in the solid-state circuit breaker device, wherein the isolating switch 110 includes an opening and closing state detection switch, which is mechanically connected to the opening and closing operating mechanism 130 as the control end of the isolating switch 110, and the opening and closing operating mechanism 130 is used to control the connection or disconnection of the isolating switch 110 according to the control signal output by the control unit 140.

[0091] The electronic switch 120 is connected in series to the output end of the isolating switch 110, and is used to quickly connect and disconnect the main circuit current, wherein the electronic switch 120 can be composed of one or more electronic switches 120 such as MOSFET, IGBT, IGCT or GTO, which are not limited here. One end of the driving unit 160 is connected to the control end of the electronic switch 120, and the other end of the driving unit 160 is connected to the control unit 140, and is used to control the conduction and disconnection of the electronic switch 120 according to the control signal of the control unit 140.

[0092] The metering unit 150 may include: a loop current sampling circuit, an input voltage sampling circuit, an output voltage sampling circuit, a metering chip and a peripheral circuit, wherein the input end of the loop circuit sampling circuit serves as a current collection end for the metering voltage. Since the current sampling component D is arranged on the loop where the isolating switch 110 and the electronic switch 120 are located, the current collection end can collect the loop current of the loop where the isolating switch 110 and the electronic switch 120 are located through the current sampling component D. The input end of the input voltage sampling circuit and the input end of the output voltage sampling circuit both serve as voltage collection ends for the metering voltage, and are used to collect the output voltage through the isolating switch 110 and the output voltage through the electronic switch The output voltage of switch 120 is measured, and the metering chip integrates multiple high-precision ADCs, reference voltage circuits, and digital signal processing circuits for all power, energy, effective value, power factor, and frequency measurements. By performing some necessary mode configurations on the internal digital circuits of the metering chip, ADC offset correction, gain correction, current and voltage calibration, the metering chip can directly obtain loop current, input voltage, output voltage, power, electric energy and other data. Through the connection between the metering unit 150 and the control unit 140, the metering chip in the metering unit 150 transmits the obtained loop current, input voltage, output voltage and other data to the control unit 140. Optionally, the current sampling component D can be arranged between the isolating switch and the electronic switch, or on one side of the isolating switch or the electronic switch, which is not limited in this embodiment.

[0093] The control unit 140 is used to determine the fault type according to the current data, voltage data or temperature data collected by the metering unit 150, wherein the fault type is used to analyze whether the electronic switch 120 and the isolating switch 110 meet the closing conditions.

[0094] Specifically, the digital output end of the metering unit 150 is connected to the control unit 140 to realize the processing of the sampled data, so that the control unit 140 can determine the fault type according to the preset configured reclosing logic and the current data and voltage data obtained from the output of the metering unit 150, and determine whether the fault type meets the closing conditions according to the fault type and the corresponding fault handling method, and further manually or automatically close the circuit, or remind the fault according to specific needs.

[0095] It should be noted that the solid-state circuit breaker device also includes: an interactive unit and an auxiliary unit, wherein the interactive unit is connected to the control unit 140, and the interactive unit may include: a communication unit, a display unit and a button, and the communication method through the communication unit may include: RS485 communication method, Ethernet, wireless WiFi and other communication methods, and the display unit may be a liquid crystal display screen, which displays data such as fault type, electric energy, and power. The solid-state circuit breaker can be connected to the terminal device through the communication unit, or the closing method of different fault types can be configured through the display unit in the interactive unit. The auxiliary unit can be an auxiliary power supply. When the preset power supply is powered off, it can be powered by the auxiliary unit to realize the closing operation of the electronic switch 120 and the isolating switch 110.

[0096] In summary, an embodiment of the present application provides a solid-state circuit breaker device, including: an isolating switch, an electronic switch, an opening and closing operating mechanism, a control unit, a metering unit, a drive unit and a current sampling component; wherein, the input end of the isolating switch is connected to a preset power supply, the control end of the isolating switch is connected to the control unit through the opening and closing operating mechanism, and the output end of the isolating switch is connected to the electronic switch through the current sampling component; the current collection end of the metering unit is connected to the output end of the current sampling component, one end of the voltage collection end of the metering unit is connected to the output end of the isolating switch, the other end of the voltage collection end of the metering unit is connected to the output end of the electronic switch, and the output end of the metering unit is connected to the control unit; the control unit is connected to the control end of the electronic switch through the drive unit, and the output end of the electronic switch is used to connect an external load; the control unit is used to determine the fault type according to the current data, voltage data or temperature data collected by the metering unit, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions. In the solid-state circuit breaker device provided in the present application, the isolating switch and the electronic switch are combined, and a control unit is used to quickly determine the fault type and determine whether the isolating switch and the electronic switch meet the closing conditions, thereby avoiding the situation where the isolating switch and the electronic switch do not meet the closing conditions but the isolating switch and the electronic switch are closed, thereby ensuring the normal use of the solid-state circuit breaker and the external load.

[0097] Figure 2 This is a schematic diagram of the structure of another solid-state circuit breaker device provided in an embodiment of the present application. Figure 2 As shown, the opening and closing operating mechanism 130 includes: an opening operating mechanism 132 and a closing operating mechanism 131 , one end of the opening operating mechanism 132 is connected to the disconnector 110 , and the control end of the opening operating mechanism 132 is connected to the control unit 140 .

[0098] One end of the closing operating mechanism 131 is connected to the disconnector 110 , and a control end of the closing operating mechanism 131 is connected to the control unit 140 .

[0099] Specifically, the opening operating mechanism 132 is used to perform an opening operation on the disconnecting switch 110 when a fault occurs in the solid-state circuit breaker system or when it is remotely controlled, wherein the opening operating mechanism 132 can be a flux tripping unit, which is mechanically connected to the disconnecting switch 110 and triggers the disconnecting switch 110 to perform an opening operation according to the opening control signal issued by the control unit 140.

[0100] The closing operating mechanism 131 is used to perform closing operation on the disconnector 110, wherein the closing operating mechanism 131 is mechanically connected to the disconnector 110, and the control end of the closing operating mechanism 131 is electrically connected to the closing control signal end of the control unit 140, and the disconnector 110 is triggered to perform closing operation according to the closing control signal sent by the control unit 140.

[0101] It should be noted that the opening and closing operating mechanism can also be an operating mechanism with both opening and closing functions. One end of the operating mechanism is connected to the disconnector, and the control end of the operating mechanism is connected to the control unit. The disconnector is triggered to perform closing or opening operation according to the control signal sent by the control unit.

[0102] The embodiment of the present application also provides a possible implementation of a reclosing control method, which is applied to a control unit in a solid-state circuit breaker device. Figure 3 One of the flow charts of a reclosing control method provided in an embodiment of the present application is as follows: Figure 3 As shown, the method includes:

[0103] S101. If the electronic switch is opened, or both the electronic switch and the isolating switch are opened, quickly obtain current data, voltage data or temperature data collected by a metering unit.

[0104] In this embodiment, the control unit in the solid-state circuit breaker device performs fault detection on the main circuit. If it is detected that the electronic switch is opened but the isolating switch is not opened, or both the electronic switch and the isolating switch are opened, it is determined that a circuit fault has occurred. At the same time, the control unit quickly obtains the current data, voltage data or temperature data collected and transmitted by the metering unit.

[0105] S102: Determine the fault type according to the current data, the voltage data, the temperature data and a preset threshold.

[0106] Among them, the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions. The control unit compares the current data with the preset threshold. If the acquired current data is greater than the preset threshold, it is determined that the main circuit has a fault, and the fault type corresponding to the fault is determined, so that the control unit uses the corresponding fault handling method to analyze whether the electronic switch and the isolating switch meet the closing conditions according to the determined fault type. If the electronic switch and the isolating switch meet the closing conditions, the control unit sends a closing control signal to the drive unit, so that the drive unit controls the electronic switch to perform the closing operation. Of course, it is also possible to obtain only the fault type according to different modes and manually close the switch, which is not limited in this embodiment.

[0107] An embodiment of the present application provides a reclosing control method, including: if the electronic switch is open, or the electronic switch and the isolating switch are both open, then obtaining current data, voltage data or temperature data collected by a metering unit; and determining the fault type based on the current data, voltage data, temperature data and a preset threshold, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions. The method provided in the present application determines the fault type to determine whether the electronic switch and the isolating switch meet the closing conditions. If it is determined that the electronic switch and the isolating switch meet the closing conditions, a reclosing operation is performed on them, thereby avoiding a reclosing operation when a fault in a solid-state circuit breaker circuit has not been eliminated or a permanent fault occurs, resulting in damage to the solid-state circuit breaker or an external load, thereby effectively ensuring the safe use of the solid-state circuit breaker and the external load.

[0108] The embodiment of the present application also provides another possible implementation of the reclosing control method, which includes, before determining the fault type according to the current data, the voltage data, the temperature data and the preset threshold value:

[0109] If the disconnector is open, the disconnector is closed by controlling the opening and closing operating mechanism.

[0110] Specifically, when the control unit detects that the electronic switch is open, or the electronic switch and the isolating switch are both open, it is determined that a fault has occurred in the main circuit. The control unit determines the level of the fault type based on the open status of the electronic switch and the isolating switch. The levels of the fault types may include: Level 1 fault type: the electronic switch is open and the isolating switch is not open; Level 2 fault type: the electronic switch and the isolating switch are both open. When it is determined that the level of the fault type is a level 2 fault, the control unit sends a closing control signal to the closing operating mechanism in the opening and closing operating mechanism, so as to control the isolating switch to perform a closing operation through the closing operating mechanism.

[0111] The embodiment of the present application also provides another possible implementation of the reclosing control method. Figure 4 A second flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Figure 4As shown, after determining the fault type according to the current data, the voltage data, the temperature data and the preset threshold, the following is further included:

[0112] S201. If the current mode is to allow automatic closing, detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met.

[0113] S202: If the current mode is not to allow automatic closing, send information about the fault type to the remote terminal.

[0114] According to different scenarios or safety requirements, the mode of the circuit breaker can be pre-configured or flexibly adjusted. In this embodiment, the control unit determines the fault type based on the current data, voltage data and preset threshold value, and determines the current closing mode. If the current setting is to allow automatic closing, it detects whether the fault is eliminated according to the fault type. If the fault is eliminated, it determines that the electronic switch and the isolating switch meet the closing conditions. If the fault is not eliminated, it determines that the electronic switch and the isolating switch do not meet the closing conditions.

[0115] If the current setting does not allow automatic closing, the fault type will be used to detect whether the fault has been eliminated. Regardless of whether the fault has been eliminated, only the fault type information will be sent to the remote terminal, and the electronic switch will not be closed.

[0116] The embodiment of the present application also provides another possible implementation of the reclosing control method. Figure 5 A third flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Figure 5 As shown, if the current mode is to allow automatic closing, it is detected whether the fault is eliminated according to the fault type, and whether the closing conditions are met, including:

[0117] S301. If the fault type is a first type fault, detect whether the first type fault is eliminated.

[0118] Among them, the first type of faults include: overload faults and short circuit faults.

[0119] If the control unit determines that the fault in the main circuit is a first type fault according to the current data and voltage data collected by the metering unit, the control unit uses a fault handling method corresponding to the first type fault to detect whether the first type fault is eliminated.

[0120] S302: If the first type of fault is eliminated, determine that the first type of fault is a transient fault, and determine whether to close the circuit breaker according to preset conditions.

[0121] S303. If the preset conditions indicate automatic closing, control the electronic switch to perform closing operation and send closing success information to the remote terminal; or, if the preset conditions do not allow automatic closing, send closing condition indication information to the remote terminal.

[0122] Specifically, the control unit detects that the first type of fault is eliminated by using the fault handling method corresponding to the first type of fault, determines that the first type of fault is a transient fault, and determines whether the preset condition indicates automatic closing.

[0123] Among them, if the first type of fault is eliminated and automatic closing is allowed, the control unit sends a closing control signal to the drive unit to control the electronic switch to perform a closing operation, and sends a closing success message to the remote terminal. If the first type of fault is eliminated but automatic closing is not allowed, an indication message that the closing conditions are met is sent to the remote terminal, indicating that the first type of fault is eliminated and the closing conditions are met.

[0124] S304: If the first type of fault is not eliminated, the first type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolating switch is controlled to return to the initial state.

[0125] The initial state indication is the state of the disconnector before the fault type is determined.

[0126] Specifically, the control unit detects that the first type of fault has not been eliminated by adopting the fault handling method corresponding to the first type of fault, and determines that the first type of fault is a permanent fault. If the state of the disconnector before determining the fault type is in the open state, the control unit sends an opening control signal to the opening operating mechanism of the opening and closing operating mechanism to control the disconnector to perform an opening operation; if the state of the disconnector before determining the fault type is in the closed state, the control unit sends a closing control signal to the closing operating mechanism of the opening and closing operating mechanism to control the disconnector to perform a closing operation, and sends fault information to the remote terminal for the user to perform manual fault troubleshooting.

[0127] In the method provided in the embodiment of the present application, for the fault type of the first type of fault, the control unit determines whether the first type of fault is eliminated by adopting the fault handling method corresponding to the first type of fault. If the first type of fault is eliminated, the first type of fault is judged to be a transient fault, and whether to perform closing is determined according to the preset conditions. If the preset conditions indicate automatic closing, the electronic switch is controlled to perform closing operation, and reclosing information is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, an indication information that the closing condition is met is sent to the remote terminal; if the first type of fault is not eliminated, the first type of fault is judged to be a permanent fault, fault information is sent to the remote terminal, and the isolating switch is controlled to return to the initial state. The control unit determines whether the first type of fault is eliminated, so that when the first type of fault is eliminated, the electronic switch is closed to ensure the safe use of the solid-state circuit breaker and the external load, and avoid damage to the solid-state circuit breaker and the external load due to the closing operation.

[0128] The embodiment of the present application also provides another possible implementation of the reclosing control method. Figure 6 A fourth flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Figure 6 As shown, if the fault type is a first type fault, then detecting whether the first type fault is eliminated includes:

[0129] S401, transmitting a preset pulse to the electronic switch to quickly obtain current data and voltage data collected by the metering unit.

[0130] S402: Determine whether the first type of fault is eliminated based on the current data, voltage data and preset thresholds collected by the metering unit.

[0131] If the first type of fault is an overload fault, the preset threshold includes a first preset threshold.

[0132] Optionally, if the current data collected by the metering unit is less than a first preset threshold, it is judged that the first type of fault is eliminated, and the first type of fault is judged to be a transient fault; if the current data collected by the metering unit is greater than or equal to the first preset threshold, it is judged that the first type of fault is not eliminated, and the first type of fault is judged to be a permanent fault.

[0133] Specifically, if the control unit determines that the first type of fault in the main circuit is an overload fault according to the current data and voltage data collected by the metering unit, the control unit uses a fault handling method corresponding to the overload fault to detect whether the overload fault is eliminated.

[0134] The control unit continuously sends pulse signals to the drive unit multiple times to control the on and off of the electronic switch, and quickly turns off the electronic switch, and repeatedly and quickly measures the loop current through the metering unit. The control unit compares the measured loop current data with the first preset threshold, that is, the preset overload current threshold, to determine whether the overload fault is eliminated. If the control unit determines that the measured loop current data is less than the first preset threshold, it is determined that the overload fault is eliminated, and the overload fault is determined to be a transient fault; if the control unit determines that the measured loop current data is greater than or equal to the first preset threshold, it is determined that the overload fault is not eliminated, and the overload fault is determined to be a permanent fault.

[0135] If the first type of fault is a short circuit fault, the preset threshold includes a second preset threshold.

[0136] Optionally, if the output voltage data collected by the metering unit is equal to the input voltage data, and the current data collected by the metering unit is less than a second preset threshold, it is judged that the first type of fault is eliminated, and the first type of fault is judged to be a transient fault; if the output voltage data collected by the metering unit is less than the input voltage data, and / or the current data collected by the metering unit is greater than or equal to the second preset threshold, it is judged that the first type of fault has not been eliminated, and the first type of fault is judged to be a permanent fault.

[0137] Specifically, if the control unit determines that the first type of fault in the main circuit is a short circuit fault according to the current data and voltage data collected by the metering unit, the control unit detects whether the short circuit fault is eliminated by adopting a fault handling method corresponding to the short circuit fault.

[0138] Among them, the control unit continuously sends pulse signals to the driving unit for multiple times to control the on and off of the electronic switch, and quickly disconnects the electronic switch, and measures the loop current data, the input voltage data and the output voltage data on both sides of the electronic switch through the metering unit. The control unit compares whether the input voltage data and the output voltage data are close, and compares the measured loop current data with the preset short-circuit current threshold, thereby judging whether the short-circuit fault is eliminated. If the control unit judges that the output voltage data is equal to the input voltage data, and the measured loop current data is less than the second preset threshold, i.e., the preset short-circuit current threshold, then it is determined that the short-circuit fault is eliminated, and the overload fault is judged to be a transient fault; if the control unit judges that the output voltage data is less than the input voltage data, and / or the measured loop current data is greater than or equal to the second preset threshold, i.e., the preset short-circuit current threshold, then it is determined that the short-circuit fault is not eliminated, and the overload fault is judged to be a permanent fault.

[0139] It should be noted that for the first type of fault, the number and width of the pulse signal sent by the control unit to the drive unit can be set differently for different first type of faults, so that the current data and voltage data collected by the metering unit when the first type of fault is an overload fault can be obtained, and the current data and voltage data collected by the metering unit when the first type of fault is a short circuit fault can be obtained.

[0140] The embodiment of the present application also provides another possible implementation of the reclosing control method. Figure 7 A fifth flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Figure 7 As shown, if the current mode is to allow automatic closing, it is detected whether the fault is eliminated according to the fault type, and whether the closing conditions are met, including:

[0141] S501. If the fault type is a second type fault, determine that the second type fault is a stage fault, and detect whether the second type fault is eliminated.

[0142] Among them, the second type of faults include: high temperature fault, overvoltage fault and undervoltage fault.

[0143] If the control unit determines that the fault in the main circuit is a second type fault based on the current data, voltage data or temperature data collected by the metering unit, the second type fault is judged to be a stage fault, and the control unit uses the fault handling method corresponding to the second type fault to detect whether the second type fault is eliminated.

[0144] S502: If the second type of fault is eliminated, determine whether to close the circuit breaker according to preset conditions.

[0145] S503. If the preset conditions indicate automatic closing, control the electronic switch to perform closing operation and send closing success information to the remote terminal; or, if the preset conditions do not allow automatic closing, send closing condition indication information to the remote terminal.

[0146] Specifically, the control unit detects that the second type of fault is eliminated by adopting the fault handling method corresponding to the second type of fault, and determines whether the preset condition indicates automatic closing.

[0147] Among them, if the second type of fault is eliminated and automatic closing is allowed, the control unit sends a closing control signal to the drive unit to control the electronic switch to perform a closing operation, and sends fault information to the remote terminal. If the second type of fault is eliminated but automatic closing is not allowed, an indication information that the closing conditions are met is sent to the remote terminal, indicating that the second type of fault is eliminated and the closing conditions are met.

[0148] S504: If the second type of fault is not eliminated, the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolating switch is controlled to return to the initial state.

[0149] The initial state indication is the state of the disconnector before the fault type is determined.

[0150] Specifically, the control unit detects that the second type of fault has not been eliminated by adopting the fault handling method corresponding to the second type of fault, and determines that the second type of fault is a permanent fault. If the state of the disconnector before determining the fault type is in the open state, the control unit sends an opening control signal to the opening operating mechanism of the opening and closing operating mechanism to control the disconnector to perform an opening operation; if the state of the disconnector before determining the fault type is in the closed state, the control unit sends a closing control signal to the closing operating mechanism of the opening and closing operating mechanism to control the disconnector to perform a closing operation, and sends fault information to the remote terminal for the user to perform manual fault troubleshooting.

[0151] In the method provided in the embodiment of the present application, for the fault type of the second type of fault, the second type of fault is determined to be a stage fault, and the control unit determines whether the second type of fault is eliminated by adopting the fault handling method corresponding to the second type of fault. If the second type of fault is eliminated, it is determined whether to perform closing according to the preset conditions; if the preset conditions indicate automatic closing, the electronic switch is controlled to perform closing operation, and fault information is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, an indication information that the closing condition is met is sent to the remote terminal; if the second type of fault is not eliminated, the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolating switch is controlled to return to the initial state. The control unit determines whether the second type of fault is eliminated, so that when the second type of fault is eliminated, the electronic switch is closed to ensure the safe use of the solid-state circuit breaker and the external load, and avoid damage to the solid-state circuit breaker and the external load due to the closing operation.

[0152] The embodiment of the present application also provides another possible implementation of the reclosing control method. Figure 8 A sixth flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Figure 8 As shown, if the fault type is a second type fault, the second type fault is determined to be a stage fault, and whether the second type fault is eliminated is detected, including:

[0153] S601. Acquire current data, voltage data or temperature data collected by a metering unit according to a preset time interval.

[0154] S602: Determine whether the second type of fault is eliminated based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold.

[0155] If the second type of fault is an overvoltage fault, the preset threshold includes a third preset threshold and a fourth preset threshold.

[0156] Optionally, if the voltage data collected by the metering unit is less than or equal to the third preset threshold, the second type of fault is judged to be a stage fault, and it is detected whether the voltage data collected by the metering unit is restored to the fourth preset threshold; if the voltage data collected by the metering unit is restored to the fourth preset threshold, the second type of fault is judged to be eliminated; if the voltage data collected by the metering unit is greater than the third preset threshold, it is judged that the second type of fault has not been eliminated, and the second type of fault is judged to be a permanent fault; if the second type of fault is eliminated and a fault occurs again within a preset time, the second type of fault is judged to be a permanent fault.

[0157] Specifically, if the control unit determines that the fault in the main circuit is an overvoltage fault according to the current data and voltage data collected by the metering unit, the control unit uses a fault handling method corresponding to the overvoltage fault to detect whether the overvoltage fault is eliminated.

[0158] Among them, the control unit detects the input voltage data in the main circuit through the metering unit according to the preset time interval, and the control unit compares the input voltage data with the third preset threshold, that is, the preset maximum allowable threshold voltage, so as to determine whether the overvoltage fault is eliminated. If the control unit determines that the input voltage data is less than or equal to the third preset threshold, that is, the preset maximum allowable threshold voltage, the overvoltage fault is determined to be a staged fault, and the detection is continued until the input voltage returns to normal, that is, it returns to the fourth preset threshold, and it is determined that the overvoltage fault is eliminated; if the control unit determines that the input voltage data is greater than the third preset threshold, that is, the preset maximum allowable threshold voltage, the overvoltage fault is determined to be a permanent fault, or, when the control unit detects the input voltage data in the main circuit through the metering unit according to the preset time interval, if the overvoltage recovery occurs for multiple consecutive times but the fault occurs again after the electronic switch is closed, the voltage is determined to be unstable and it is determined to be a permanent fault.

[0159] If the second type of fault is an undervoltage fault, the preset threshold includes a fifth preset threshold.

[0160] Optionally, the second type of fault is judged to be a stage fault. If the voltage data collected by the metering unit recovers to the fifth preset threshold, the second type of fault is judged to be eliminated; if the second type of fault is eliminated and a fault occurs again within a preset time, the second type of fault is judged to be a permanent fault.

[0161] Specifically, if the control unit determines that the fault in the main circuit is an undervoltage fault according to the current data and voltage data collected by the metering unit, the control unit uses a fault handling method corresponding to the undervoltage fault to detect whether the undervoltage fault is eliminated.

[0162] Among them, the control unit detects the input voltage data in the main circuit through the metering unit according to the preset time interval, and the control unit compares the input voltage data with the fifth preset threshold value to determine whether the undervoltage fault is eliminated. The control unit continues to detect, and if it is detected that the input voltage data recovers to the fifth preset threshold value, that is, the preset threshold voltage, it is determined that the undervoltage fault is eliminated; if the control unit detects the input voltage data in the main circuit through the metering unit according to the preset time interval, and the undervoltage is recovered for multiple consecutive times but the fault occurs again after the electronic switch is closed, it is determined that the voltage is unstable and it is determined to be a permanent fault.

[0163] If the second type of fault is a high temperature fault, the preset threshold includes a sixth preset threshold.

[0164] Optionally, the second type of fault is judged to be a stage fault. If the temperature data collected by the metering unit recovers to the sixth preset threshold, the second type of fault is judged to be eliminated; if the second type of fault is eliminated and then fails again within a preset time, the second type of fault is judged to be a permanent fault.

[0165] Specifically, if the control unit determines that the fault in the main circuit is a high temperature fault according to the temperature data collected by the metering unit, the control unit uses a fault handling method corresponding to the temperature fault to detect whether the temperature fault is eliminated.

[0166] The control unit detects the temperature data in the main circuit through the metering unit according to the preset time interval, and compares the temperature data with the preset temperature threshold to determine whether the high temperature fault is eliminated. If the control unit determines that the temperature data does not meet the sixth preset threshold, that is, the preset temperature threshold, the detection is continued until the temperature recovers to the sixth preset threshold, and it is determined that the high temperature fault is eliminated. If the control unit detects the temperature data in the main circuit through the metering unit according to the preset time interval, and the high temperature is recovered for multiple times but the fault occurs again after the electronic switch is closed, it is determined to be a permanent fault.

[0167] The embodiment of the present application also provides another possible implementation of the reclosing control method. Fig. 9 A seventh flow chart of a reclosing control method provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, in one scenario, the staff remotely controls the closing of the switch. Optionally, if the automatic closing mode is not allowed at present, after sending the fault type information to the remote terminal, it also includes:

[0168] S701. Receive a fault inspection instruction sent by a remote terminal.

[0169] In this embodiment, when a fault occurs in the main circuit of the solid-state circuit breaker, after the control unit determines the fault type, since the preset condition indicates that automatic closing is not allowed, only closing condition indication information is sent to the remote terminal, so that the remote terminal can send a fault detection indication to the control unit according to the received closing condition indication information, and the control unit can receive the fault inspection indication sent by the remote terminal.

[0170] Alternatively, when there is no fault in the main circuit of the solid-state circuit breaker and it is in a non-working state, the remote terminal sends a fault detection indication to the control unit to wake up the solid-state circuit breaker so that the isolating switch and the electronic switch in the solid-state circuit breaker are closed, so that the control unit can receive the fault inspection indication sent by the remote terminal.

[0171] S702: After receiving the fault inspection instruction, check whether the fault elimination is completed.

[0172] S703: If the fault elimination is determined to be complete, the electronic switch is controlled to close.

[0173] S704: If the fault elimination judgment is not completed, detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met.

[0174] Specifically, the control unit detects whether the fault elimination is judged to be completed, that is, determines whether the fault type of the fault in the solid-state circuit breaker circuit has been determined before receiving the fault detection indication, and whether it has been judged that the fault has been eliminated or not.

[0175] If it has been determined that the fault has been eliminated, that is, the fault meets the closing condition, the control unit sends a closing control signal to the drive unit to control the electronic switch to perform a closing operation.

[0176] If the fault has not been eliminated, the control unit determines the fault type based on the current data and voltage data collected by the metering unit, and detects whether the fault has been eliminated and whether the closing conditions are met. The specific judgment process is described in detail in the above steps S101-S602 and will not be repeated here.

[0177] The embodiment of the present application also provides another possible implementation of the reclosing control method. Fig.10 The eighth flow chart of a reclosing control method provided in the embodiment of the present application is as follows: Fig.10 As shown, after receiving the fault check indication sent by the remote terminal, the following steps are included:

[0178] S801. Obtain the tripping reason according to the fault detection indication.

[0179] S802: If the tripping reason is a fault tripping, then check whether the fault elimination is completed.

[0180] In this embodiment, the control unit determines the reason for the solid-state circuit breaker to be tripped according to the received fault inspection indication. The tripping reason may include: fault tripping and non-fault tripping. If the tripping reason is fault tripping, it indicates that a fault occurs in the main circuit of the solid-state circuit breaker. After the control unit determines the type of fault, since the preset condition indicates that automatic closing is not allowed, only closing condition indication information is sent to the remote terminal, so that the remote terminal sends a fault detection indication to the control unit according to the received closing condition indication information, instructing the control unit to perform fault detection and allow automatic closing.

[0181] S803: If the reason for the trip is not a fault trip, control the electronic switch to close.

[0182] Among them, the non-fault opening indicates that there is no fault in the main circuit of the solid-state circuit breaker and it is in a non-working state, and then the control unit is instructed to control the isolating switch and the electronic switch to perform a closing operation.

[0183] When the current mode is to allow automatic closing, the embodiment of the present application further provides a possible implementation of a reclosing control method. Fig.11 A ninth flow chart of a reclosing control method provided in an embodiment of the present application is as follows: Fig.11As shown, the method includes:

[0184] S901. If the electronic switch is opened, or both the electronic switch and the isolating switch are opened, current data, voltage data or temperature data collected by a metering unit is obtained.

[0185] S902. If the isolating switch is open, the isolating switch is closed by controlling the opening and closing operating mechanism.

[0186] S903: Determine the fault type according to the current data, the voltage data, the temperature data and a preset threshold.

[0187] S904: If the current mode is to allow automatic closing, detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met.

[0188] S905: If the fault type is a first type fault, detect whether the first type fault is eliminated.

[0189] S906: If the fault type is a second type fault, determine that the second type fault is a stage fault, and detect whether the second type fault is eliminated.

[0190] S907. If the first type of fault is eliminated, determine that the first type of fault is a transient fault, and determine whether to execute closing according to preset conditions.

[0191] S908. If the second type of fault is eliminated, determine whether to close the circuit breaker according to preset conditions.

[0192] S909. If the preset conditions indicate automatic closing, control the electronic switch to perform closing operation and send closing success information to the remote terminal; or, if the preset conditions do not allow automatic closing, send closing condition indication information to the remote terminal.

[0193] S910. If the first type of fault is not eliminated, determine that the first type of fault is a permanent fault, send fault information to the remote terminal, and control the isolation switch to return to the initial state.

[0194] S911. If the second type of fault is not eliminated, the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolating switch is controlled to return to the initial state.

[0195] Specifically, the content descriptions in steps S901-S911 have been explained in detail in the above S101-S602, and will not be repeated here.

[0196] When the current mode is not allowing automatic closing, the embodiment of the present application further provides a possible implementation of a reclosing control method. Fig.12 A tenth flowchart of a reclosing control method provided in an embodiment of the present application is shown in FIG. Fig.12 As shown, the method includes:

[0197] S1001. Receive a fault inspection indication sent by a remote terminal.

[0198] S1002. Obtain the tripping reason according to the fault detection indication.

[0199] S1003. If the reason for the trip is a fault trip, then check whether the fault elimination is complete.

[0200] S1004: If the fault elimination is determined to be complete, the electronic switch is controlled to close.

[0201] S1005: If the fault elimination judgment is not completed, detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met.

[0202] S1006. If the reason for the trip is not a fault trip, control the electronic switch to close.

[0203] Among them, detecting whether the fault is eliminated according to the fault type and determining whether the closing condition is met are similar to the above steps S901-S911 and will not be repeated here.

[0204] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A solid-state circuit breaker device, characterized in that: include: An isolating switch, an electronic switch, an opening and closing operating mechanism, a control unit, a metering unit, a driving unit and a current sampling component; wherein the input end of the isolating switch is connected to a preset power supply, the control end of the isolating switch is connected to the control unit through the opening and closing operating mechanism, and the output end of the isolating switch is connected to the electronic switch through the current sampling component; The current collection end of the metering unit is connected to the output end of the current sampling component, one end of the voltage collection end of the metering unit is connected to the output end of the isolation switch, the other end of the voltage collection end of the metering unit is connected to the output end of the electronic switch, and the output end of the metering unit is connected to the control unit; The control unit is connected to the control end of the electronic switch through the driving unit, and the output end of the electronic switch is used to connect an external load; The control unit is used to determine the fault type according to the current data, voltage data or temperature data collected by the metering unit, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet the closing conditions.

2. The device according to claim 1, characterized in that The opening and closing operating mechanism comprises: an opening operating mechanism and a closing operating mechanism, one end of the opening operating mechanism is connected to the disconnector, and the control end of the opening operating mechanism is connected to the control unit; One end of the closing operating mechanism is connected to the isolating switch, and a control end of the closing operating mechanism is connected to the control unit.

3. A reclosing control method, characterized in that: A control unit applied to the solid-state circuit breaker device according to claim 1 or 2, the method comprising: If the electronic switch is opened, or both the electronic switch and the isolating switch are opened, quickly acquiring the current data, voltage data or temperature data collected by the metering unit; The fault type is determined according to the current data, the voltage data, the temperature data and a preset threshold, wherein the fault type is used to analyze whether the electronic switch and the isolating switch meet a closing condition.

4. The method according to claim 3, characterized in that Before determining the fault type according to the current data, the voltage data, the temperature data and the preset threshold, the method further includes: If the isolating switch is open, the isolating switch is closed by controlling the opening and closing operating mechanism.

5. The method according to claim 4, characterized in that After determining the fault type according to the current data, voltage data, temperature data and preset threshold, the method further includes: If the current mode is to allow automatic closing, then detect whether the fault is eliminated according to the fault type, and determine whether the closing condition is met; If the current mode is not to allow automatic closing, information about the fault type is sent to the remote terminal.

6. The method according to claim 5, characterized in that If the current mode is to allow automatic closing, detecting whether the fault is eliminated according to the fault type and determining whether the closing condition is met includes: If the fault type is a first type of fault, detecting whether the first type of fault is eliminated, wherein the first type of fault includes: an overload fault and a short circuit fault; If the first type of fault is eliminated, the first type of fault is determined to be a transient fault, and whether to execute closing is determined according to preset conditions; If the preset condition indicates automatic closing, control the electronic switch to perform a closing operation, and send a closing success message to the remote terminal; or, if the preset condition does not allow automatic closing, send a closing condition indication message to the remote terminal; If the first type of fault is not eliminated, the first type of fault is determined to be a permanent fault, and fault information is sent to a remote terminal, and the isolation switch is controlled to restore to an initial state, wherein the initial state indicates the state of the isolation switch before the fault type is determined.

7. The method according to claim 6, characterized in that If the fault type is a first type fault, detecting whether the first type fault is eliminated includes: Transmitting a preset pulse to the electronic switch to quickly obtain the current data and voltage data collected by the metering unit; Whether the first type of fault is eliminated is determined based on the current data, voltage data collected by the metering unit and the preset threshold.

8. The method according to claim 7, characterized in that The first type of fault is an overload fault, the preset threshold includes a first preset threshold, and judging whether the first type of fault is eliminated according to the current data, voltage data collected by the metering unit and the preset threshold, includes: If the current data collected by the metering unit is less than the first preset threshold, it is determined that the first type of fault is eliminated and the first type of fault is determined to be a transient fault; If the current data collected by the metering unit is greater than or equal to the first preset threshold, it is determined that the first type of fault has not been eliminated and that the first type of fault is a permanent fault.

9. The method according to claim 7, characterized in that The first type of fault is a short circuit fault, the preset threshold includes a second preset threshold, and judging whether the first type of fault is eliminated according to the current data, voltage data collected by the metering unit and the preset threshold, includes: If the output voltage data collected by the metering unit is equal to the input voltage data, and the current data collected by the metering unit is less than the second preset threshold, it is determined that the first type of fault is eliminated and the first type of fault is determined to be a transient fault; If the output voltage data collected by the metering unit is less than the input voltage data, and / or the current data collected by the metering unit is greater than or equal to the second preset threshold, it is determined that the first type of fault has not been eliminated and the first type of fault is determined to be a permanent fault.

10. The method according to claim 5, characterized in that If the current mode is to allow automatic closing, detecting whether the fault is eliminated according to the fault type and determining whether the closing condition is met includes: If the fault type is a second type of fault, the second type of fault is determined to be a staged fault, and whether the second type of fault is eliminated is detected, wherein the second type of fault includes: a high temperature fault, an overvoltage fault, and an undervoltage fault; If the second type of fault is eliminated, whether to close the circuit breaker is determined according to the preset conditions; If the preset condition indicates automatic closing, control the electronic switch to perform a closing operation, and send a closing success message to the remote terminal; or, if the preset condition does not allow automatic closing, send a closing condition indication message to the remote terminal; If the second type of fault is not eliminated, the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal, and the isolation switch is controlled to return to an initial state, wherein the initial state indicates the state of the isolation switch before the fault type is determined.

11. The method according to claim 10, characterized in that If the fault type is a second type of fault, determining that the second type of fault is a staged fault, and detecting whether the second type of fault is eliminated, includes: Acquiring current data, voltage data or temperature data collected by the metering unit according to a preset time interval; Whether the second type of fault is eliminated is determined based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold.

12. The method according to claim 11, characterized in that The second type of fault is an overvoltage fault, the preset threshold includes a third preset threshold and a fourth preset threshold, and judging whether the second type of fault is eliminated according to the current data, voltage data, temperature data collected by the metering unit and the preset threshold, includes: If the voltage data collected by the metering unit is less than or equal to the third preset threshold, the second type of fault is judged to be a staged fault, and whether the voltage data collected by the metering unit is restored to the fourth preset threshold is detected. If the voltage data collected by the metering unit is restored to the fourth preset threshold, it is judged that the second type of fault is eliminated; If the voltage data collected by the metering unit is greater than the third preset threshold, it is determined that the second type of fault has not been eliminated, and the second type of fault is determined to be a permanent fault; If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

13. The method according to claim 11, characterized in that The second type of fault is an undervoltage fault, the preset threshold includes a fifth preset threshold, and judging whether the second type of fault is eliminated based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold, includes: determining that the second type of fault is a stage fault, and if the voltage data collected by the metering unit is restored to the fifth preset threshold, determining that the second type of fault is eliminated; If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

14. The method according to claim 11, characterized in that The second type of fault is a high temperature fault, the preset threshold includes a sixth preset threshold, and judging whether the second type of fault is eliminated according to the current data, voltage data, temperature data collected by the metering unit and the preset threshold, includes: determining that the second type of fault is a stage fault, and if the temperature data collected by the metering unit is restored to the sixth preset threshold, determining that the second type of fault is eliminated; If the second type of fault is eliminated and then reappears within a preset time, the second type of fault is determined to be a permanent fault.

15. The method according to claim 5, characterized in that If the current automatic closing mode is not allowed, after sending the fault type information to the remote terminal, the method further includes: receiving a fault inspection indication sent by the remote terminal; After receiving the fault inspection indication, detecting whether the fault elimination is judged to be completed; If the fault elimination is judged to be complete, the electronic switch is controlled to close; If the fault elimination judgment is not completed, it is detected whether the fault is eliminated according to the fault type, and whether the closing conditions are met.

16. The method according to claim 15, characterized in that After receiving the fault inspection indication sent by the remote terminal, the method further comprises: Obtaining the tripping reason according to the fault inspection indication; If the tripping reason is a fault tripping, then detecting whether the fault elimination is completed; If the tripping reason is not a fault tripping, the electronic switch is controlled to close.

Images