Solid-state circuit breaker devices and reclosing control methods

Abstract

This application provides a solid-state circuit breaker device and a reclosing control method, relating to the field of low-voltage electrical equipment technology. The device includes: a disconnecting switch, an electronic switch, a tripping / closing operating mechanism, a control unit, a metering unit, a drive unit, and a current sampling component. The disconnecting switch is connected to a preset power supply. The disconnecting switch is connected to the control unit via the tripping / closing operating mechanism. The disconnecting switch is connected to the electronic switch via the current sampling component. The current acquisition terminal of the metering unit is connected to the output terminal of the current sampling component. The voltage acquisition terminal of the metering unit is connected to the output terminals of the disconnecting switch and the electronic switch, respectively. The output terminal of the metering unit is connected to the control unit. The control unit is connected to the electronic switch via the drive unit. The output terminal of the electronic switch is used to connect to an external load. The control unit is used to determine the fault type based on the current data, voltage data, or temperature data acquired by the metering unit, and to determine whether the disconnecting switch and the electronic switch meet the closing conditions.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and more specifically, to a solid-state circuit breaker device and a reclosing control method. Background Technology

[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 trip, cutting off power to the load circuit and thus 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] Currently, in most cases, traditional mechanical circuit breakers automatically trip due to momentary overload or protection failure. If reclosing is successful, it can improve the reliability of power supply. However, for permanent faults, the short circuit fault still exists after the automatic reclosing device operates, and there is a high possibility that the downstream electrical equipment will be short-circuited and burned out when the device is closed.

[0004] Therefore, this application provides a solid-state circuit breaker that combines mechanical and electronic components, which can open and close the solid-state circuit breaker in real time, quickly and continuously, to avoid burning out downstream equipment. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a solid-state circuit breaker device and a reclosing control method, so as to open and close the solid-state circuit breaker in real time, quickly and continuously, and avoid burning out downstream equipment.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0007] In a first aspect, embodiments of this application provide a solid-state circuit breaker device, including: a disconnecting switch, an electronic switch, a tripping and closing operating mechanism, a control unit, a metering unit, a drive unit, and a current sampling component; wherein, the input terminal of the disconnecting switch is connected to a preset power supply, the control terminal of the disconnecting switch is connected to the control unit through the tripping and closing operating mechanism, and the output terminal of the disconnecting switch is connected to the electronic switch through the current sampling component;

[0008] The current acquisition terminal of the metering unit is connected to the output terminal of the current sampling component, one end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the disconnecting switch, the other end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the electronic switch, and the output terminal of the metering unit is connected to the control unit.

[0009] The control unit is connected to the control terminal of the electronic switch via the drive unit, and the output terminal of the electronic switch is used to connect to an external load.

[0010] The control unit is used to determine the fault type based on 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 disconnecting switch meet the closing conditions.

[0011] In an optional embodiment, the opening and closing operation mechanism includes: an opening operation mechanism and a closing operation mechanism, one end of the opening operation mechanism is connected to the disconnecting switch, and the control end of the opening operation mechanism is connected to the control unit;

[0012] One end of the closing operation mechanism is connected to the disconnecting switch, and the control end of the closing operation mechanism is connected to the control unit.

[0013] Secondly, embodiments of this application provide a reclosing control method, applied to the control unit of the solid-state circuit breaker device described in the first aspect above, the method comprising:

[0014] If the electronic switch is tripped, or if both the electronic switch and the isolating switch are tripped, the current data, voltage data, or temperature data collected by the metering unit are quickly acquired.

[0015] Based on the current data, voltage data, temperature data, and preset threshold, the fault type is determined, wherein the fault type is used to analyze whether the electronic switch and the disconnecting switch meet the closing conditions.

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

[0017] If the disconnecting switch is opened, the disconnecting switch is closed by the opening and closing operation mechanism.

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

[0019] If the current mode is automatic closing, then the fault type is used to check whether the fault has been eliminated and to determine whether the closing conditions are met.

[0020] If the current mode is not allowed to automatically close the circuit breaker, then send the fault type information to the remote terminal.

[0021] In an optional implementation, the step of detecting whether the fault has been eliminated based on the fault type and determining whether the closing conditions are met if the current mode is automatic closing is enabled includes:

[0022] If the fault type is a first type of fault, then check whether the first type of fault has been eliminated. The first type of fault includes: overload fault and short circuit fault.

[0023] If the first type of fault is eliminated, it is determined that the first type of fault is a transient fault, and whether to close the circuit is determined according to preset conditions.

[0024] If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and a closing success message is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message is sent 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, the step of detecting whether the first type of fault has been eliminated if the fault type is a first type of fault includes:

[0027] A preset pulse is emitted to the electronic switch to quickly acquire the current and voltage data collected by the metering unit;

[0028] Based on the current data, voltage data, and preset threshold acquired by the metering unit, it is determined whether the first type of fault has been eliminated.

[0029] In an optional implementation, the first type of fault is an overload fault, the preset threshold includes a first preset threshold, and the step of determining whether the first type of fault has been eliminated based on the current data and 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, then the first type of fault is determined to be 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 disconnecting switch is controlled to return to the initial state, wherein the initial state indicates the state of the disconnecting switch before the fault type is determined.

[0032] In an optional implementation, the first type of fault is a short-circuit fault, the preset threshold includes a second preset threshold, and the step of determining whether the first type of fault has been eliminated based on the current data and 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, then the first type of fault is determined to be 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, then it is determined that the first type of fault has not been eliminated and that the first type of fault is a permanent fault.

[0035] In an optional implementation, the step of detecting whether the fault has been eliminated based on the fault type and determining whether the closing conditions are met if the current mode is automatic closing is enabled includes:

[0036] If the fault type is the second type, then the second type of fault is determined to be a phased fault, and it is checked whether the second type of fault has been eliminated. The second type of fault includes: high temperature fault, overvoltage fault and undervoltage fault.

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

[0038] If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and a closing success message is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message is sent 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. The disconnecting switch is then controlled to return to its initial state, wherein the initial state indicates the state of the disconnecting switch before the fault type was determined.

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

[0041] The current, voltage, and temperature data collected by the metering unit are acquired according to a preset time interval.

[0042] Based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold, it is determined whether the second type of fault has been eliminated.

[0043] In an optional implementation, the second type of fault is an overvoltage fault, and the preset threshold includes a third preset threshold and a fourth preset threshold. The step of determining whether the second type of fault has been eliminated based on 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, then the second type of fault is determined to be a stage fault, and it is detected whether the voltage data collected by the metering unit has recovered to the fourth preset threshold. If the voltage data collected by the metering unit has recovered to the fourth preset threshold, then the second type of fault is determined to be eliminated.

[0045] 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 that the second type of fault is a permanent fault.

[0046] If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault.

[0047] In an optional implementation, the second type of fault is an undervoltage fault, and the preset threshold includes a fifth preset threshold. The step of determining whether the second type of fault has been eliminated based on the current data, voltage data, temperature data collected by the metering unit, and the preset threshold includes:

[0048] If the second type of fault is determined to be a phased fault, and the voltage data collected by the metering unit recovers to the fifth preset threshold, then the second type of fault is determined to be eliminated.

[0049] If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault.

[0050] In an optional implementation, the second type of fault is a high-temperature fault, and the preset threshold includes a sixth preset threshold. The step of determining whether the second type of fault has been eliminated based on the current data, voltage data, temperature data collected by the metering unit, and the preset threshold includes:

[0051] If the second type of fault is determined to be a phased fault, and the temperature data collected by the metering unit recovers to the sixth preset threshold, then the second type of fault is determined to be eliminated.

[0052] If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault.

[0053] In an optional implementation, after sending the fault type information to the remote terminal if the current mode is not allowed to automatically close, the method further includes:

[0054] Receive the fault check instruction sent by the remote terminal;

[0055] After receiving the fault check instruction, check whether the fault elimination has been completed;

[0056] If the fault clearance judgment is completed, then control the electronic switch to close;

[0057] If the fault clearance judgment is not completed, then check whether the fault has been cleared according to the fault type and determine whether the closing conditions are met.

[0058] In an optional implementation, after receiving the fault check instruction sent by the remote terminal, the process includes:

[0059] The reason for the circuit breaker tripping is determined based on the fault inspection indication;

[0060] If the reason for the circuit breaker tripping is a fault tripping, then check whether the fault clearance has been completed.

[0061] If the reason for the tripping is not a fault tripping, then control the electronic switch to close.

[0062] The beneficial effects of this application are:

[0063] This application provides a solid-state circuit breaker device and a reclosing control method. The solid-state circuit breaker device includes: a disconnecting switch, an electronic switch, a tripping and closing operating mechanism, a control unit, a metering unit, a drive unit, and a current sampling component. The input terminal of the disconnecting switch is connected to a preset power supply, the control terminal of the disconnecting switch is connected to the control unit via the tripping and closing operating mechanism, and the output terminal of the disconnecting switch is connected to the electronic switch via the current sampling component. The current acquisition terminal of the metering unit is connected to the output terminal of the current sampling component, one end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the disconnecting switch, the other end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the electronic switch, and the output terminal of the metering unit is connected to the control unit. The control unit is connected to the control terminal of the electronic switch via the drive unit, and the output terminal of the electronic switch is used to connect to an external load. The control unit is used to determine the fault type based on the current data, voltage data, or temperature data acquired by the metering unit, wherein the fault type is used to analyze whether the electronic switch and the disconnecting switch meet the closing conditions. The solid-state circuit breaker device provided in this application combines a disconnecting switch and an electronic switch, and uses a control unit to quickly determine the fault type, so as to determine whether the disconnecting switch and the electronic switch meet the closing conditions, avoiding the situation where the disconnecting switch and the electronic switch do not meet the closing conditions, but the closing operation is performed on the disconnecting switch and the electronic switch, thus ensuring the normal use of the solid-state circuit breaker and the external load. Attached Figure Description

[0064] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 This is a schematic diagram of the structure of a solid-state circuit breaker device provided in an embodiment of this application;

[0066] Figure 2 A schematic diagram of the structure of another solid-state circuit breaker device provided in the embodiments of this application;

[0067] Figure 3 This is one of the flowcharts illustrating a reclosing control method provided in an embodiment of this application;

[0068] Figure 4 A second schematic flowchart of a reclosing control method provided in an embodiment of this application;

[0069] Figure 5 The third schematic flowchart of a reclosing control method provided in this application embodiment;

[0070] Figure 6 The fourth flowchart illustrates a reclosing control method provided in this application embodiment;

[0071] Figure 7 Fifth of a flowchart illustrating a reclosing control method provided in this application embodiment;

[0072] Figure 8 A flowchart illustrating a reclosing control method provided in this application is shown in Figure 6.

[0073] Figure 9 The seventh flowchart illustrates a reclosing control method provided in this application embodiment;

[0074] Figure 10 This is the eighth flowchart illustrating a reclosing control method provided in an embodiment of this application.

[0075] Figure 11 A flowchart illustrating a reclosing control method provided in this application embodiment is shown in Figure 9.

[0076] Figure 12 This is the tenth flowchart illustrating a reclosing control method provided in an embodiment of this application.

[0077] Explanation of key component symbols: 110-Disconnecting switch; 120-Electronic switch; 130-Closing and tripping operating mechanism; 131-Closing operating mechanism; 132-Tripping operating mechanism; 140-Control unit; 150-Metering unit; 160-Drive unit; D-Current sampling component. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0079] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0080] In the description of this application, it should be noted that if the terms "upper", "lower", etc. appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0081] Furthermore, the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0082] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0083] The solid-state circuit breaker device provided in this application is illustrated below with reference to the accompanying drawings through several examples.

[0084] Figure 1This is a schematic diagram of a solid-state circuit breaker device provided in an embodiment of this application. Figure 1 As shown, the device includes: a disconnecting switch 110, an electronic switch 120, a circuit breaker operating mechanism 130, a control unit 140, a metering unit 150, a drive unit 160, and a current sampling component D; wherein, the input terminal of the disconnecting switch 110 is connected to a preset power supply, the control terminal of the disconnecting switch 110 is connected to the control unit 140 through the circuit breaker operating mechanism 130, and the output terminal of the disconnecting switch 110 is connected to the electronic switch 120 through the current sampling component D.

[0085] The current acquisition terminal of the metering unit 150 is connected to the output terminal of the current sampling component D. One end of the voltage acquisition terminal of the metering unit 150 is connected to the output terminal of the disconnecting switch 110, and the other end of the voltage acquisition terminal of the metering unit 150 is connected to the output terminal of the electronic switch 120. The output terminal of the metering unit 150 is connected to the control unit 140.

[0086] The control unit 140 is connected to the control terminal of the electronic switch 120 via the drive unit 160, and the output terminal of the electronic switch 120 is used to connect to an external load.

[0087] In this embodiment, the disconnecting switch 110 is a mechanical switch used to connect or disconnect the main circuit current in the solid-state circuit breaker device. The disconnecting switch 110 includes an open / closed state detection switch, which serves as the control terminal of the disconnecting switch 110 and is mechanically connected to the opening / closing operation mechanism 130. The opening / closing operation mechanism 130 is used to control the disconnecting switch 110 to connect or disconnect according to the control signal output by the control unit 140.

[0088] Electronic switch 120 is connected in series with the output terminal of disconnector switch 110 for quickly connecting and disconnecting the main circuit current. Electronic switch 120 may be composed of one or more of electronic switches such as MOSFET, IGBT, IGCT, or GTO, without limitation. One end of drive unit 160 is connected to the control terminal of electronic switch 120, and the other end of drive unit 160 is connected to control unit 140 for controlling the conduction and cutoff of electronic switch 120 according to the control signal of control unit 140.

[0089] 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 peripheral circuits. The input terminal of the loop sampling circuit serves as the current acquisition terminal for the metering voltage. Since the current sampling component D is located on the loop containing the isolating switch 110 and the electronic switch 120, the current acquisition terminal can acquire the loop current of the loop containing the isolating switch 110 and the electronic switch 120 through the current sampling component D. The input terminals of both the input voltage sampling circuit and the output voltage sampling circuit serve as voltage acquisition terminals for the metering voltage, used to acquire the output voltage through the isolating switch 110 and the output voltage through the electronic switch 120. The output voltage of switch 120 is controlled by the metering chip, which integrates multiple high-precision ADCs, reference voltage circuits, and digital signal processing circuits for measuring power, energy, RMS value, power factor, and frequency. By configuring the internal digital circuits of the metering chip, performing ADC offset correction, gain correction, and current and voltage calibration, the metering chip can directly obtain data such as loop current, input voltage, output voltage, power, and energy. Through the connection between metering unit 150 and control unit 140, the metering chip in metering unit 150 transmits the obtained loop current, input voltage, and output voltage data to control unit 140. Optionally, the current sampling component D can be located between the disconnecting switch and the electronic switch, or on one side of the disconnecting switch or the electronic switch; this embodiment is not limited to this.

[0090] The control unit 140 is used to determine the fault type based on the current data, voltage data or temperature data collected by the metering unit 150. The fault type is used to analyze whether the electronic switch 120 and the disconnecting switch 110 meet the closing conditions.

[0091] Specifically, the digital output terminal of the metering unit 150 is connected to the control unit 140 to process the sampled data. This allows the control unit 140 to determine the fault type based on the preset reclosing logic and the current and voltage data output by the metering unit 150. Based on the fault type and the corresponding fault handling method, the control unit 140 can determine whether the fault type meets the closing conditions and then manually or automatically close the circuit or alert the user to the fault, depending on the specific requirements.

[0092] It should be noted that the solid-state circuit breaker device also includes an interaction unit and an auxiliary unit. The interaction unit is connected to the control unit 140 and may include a communication unit, a display unit, and buttons. Communication methods via the communication unit may include RS485 communication, Ethernet, and wireless WiFi. The display unit may be an LCD screen displaying data such as fault type, energy, and power. The solid-state circuit breaker can connect to terminal equipment via the communication unit, or the closing method for different fault types can be configured via the display unit in the interaction unit. The auxiliary unit may be an auxiliary power supply. When the preset power supply fails, power can be supplied through the auxiliary unit to perform closing operations on the electronic switch 120 and the disconnecting switch 110.

[0093] In summary, this application provides a solid-state circuit breaker device, including: a disconnecting switch, an electronic switch, a tripping and closing operating mechanism, a control unit, a metering unit, a drive unit, and a current sampling component; wherein, the input terminal of the disconnecting switch is connected to a preset power supply, the control terminal of the disconnecting switch is connected to the control unit through the tripping and closing operating mechanism, and the output terminal of the disconnecting switch is connected to the electronic switch through the current sampling component; the current acquisition terminal of the metering unit is connected to the output terminal of the current sampling component, one end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the disconnecting switch, the other end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the electronic switch, and the output terminal of the metering unit is connected to the control unit; the control unit is connected to the control terminal of the electronic switch through the drive unit, and the output terminal of the electronic switch is used to connect to an external load; the control unit is used to determine the fault type based on 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 disconnecting switch meet the closing conditions. The solid-state circuit breaker device provided in this application combines a disconnecting switch and an electronic switch. The control unit enables rapid judgment of the fault type and determines whether the disconnecting switch and the electronic switch meet the closing conditions. This avoids situations where the disconnecting switch and the electronic switch do not meet the closing conditions, but the closing operation is performed on the disconnecting switch and the electronic switch, thus ensuring the normal use of the solid-state circuit breaker and the external load.

[0094] Figure 2 This is a structural schematic diagram of another solid-state circuit breaker device provided in an embodiment of this application. (See attached diagram.) Figure 2 As shown, the opening and closing operation mechanism 130 includes: opening operation mechanism 132 and closing operation mechanism 131. One end of the opening operation mechanism 132 is connected to the disconnecting switch 110, and the control end of the opening operation mechanism 132 is connected to the control unit 140.

[0095] One end of the closing operation mechanism 131 is connected to the disconnecting switch 110, and the control end of the closing operation mechanism 131 is connected to the control unit 140.

[0096] Specifically, the tripping operation mechanism 132 is used to trip the disconnector switch 110 when the solid-state circuit breaker system malfunctions or is remotely controlled. The tripping operation mechanism 132 can be a magnetic flux tripping unit, which is mechanically connected to the disconnector switch 110 and triggers the disconnector switch 110 to perform the tripping operation according to the tripping control signal issued by the control unit 140.

[0097] The closing operation mechanism 131 is used to close the disconnecting switch 110. The closing operation mechanism 131 is mechanically connected to the disconnecting switch 110, and the control terminal of the closing operation mechanism 131 is electrically connected to the closing control signal terminal of the control unit 140. The closing operation is triggered by the closing control signal issued by the control unit 140.

[0098] It should be noted that the opening and closing operating mechanism can also be an operating mechanism that has both opening and closing functions. One end of the operating mechanism is connected to the disconnecting switch, and the control end of the operating mechanism is connected to the control unit. The disconnecting switch is triggered to perform closing or opening operations according to the control signal issued by the control unit.

[0099] This application also provides a possible implementation of a reclosing control method, applied to a control unit in a solid-state circuit breaker device. Figure 3 This is one of the flowcharts illustrating a reclosing control method provided in an embodiment of this application, such as... Figure 3 As shown, the method includes:

[0100] S101. If the electronic switch is tripped, or both the electronic switch and the disconnecting switch are tripped, the current data, voltage data, or temperature data collected by the metering unit will be quickly acquired.

[0101] In this embodiment, the control unit in the solid-state circuit breaker device performs fault detection on the main circuit. If it detects that the electronic switch has tripped but the disconnector has not tripped, or that both the electronic switch and the disconnector have tripped, it determines that a circuit fault has occurred. At the same time, the control unit quickly acquires the current data, voltage data, or temperature data collected and transmitted by the metering unit.

[0102] S102. Determine the fault type based on current data, voltage data, temperature data, and preset thresholds.

[0103] The fault type is used to analyze whether the electronic switch and disconnector meet the closing conditions. The control unit compares the current data with a preset threshold. If the acquired current data is greater than the preset threshold, a fault is determined in the main circuit, and the corresponding fault type is identified. Based on the determined fault type, the control unit uses the corresponding fault handling method to analyze whether the electronic switch and disconnector meet the closing conditions. If the electronic switch and disconnector meet the closing conditions, the control unit sends a closing control signal to the drive unit, causing the drive unit to control the electronic switch to perform the closing operation. Of course, depending on the mode, only the fault type can be acquired, and the closing can be performed manually; this embodiment does not impose any restrictions.

[0104] This application provides a reclosing control method, including: if the electronic switch is open, or both the electronic switch and the disconnecting switch are open, acquiring current data, voltage data, or temperature data collected by the metering unit; and determining the fault type based on the current data, voltage data, temperature data, and a preset threshold. The fault type is used to analyze whether the electronic switch and the disconnecting switch meet the closing conditions. The method provided in this application determines whether the electronic switch and the disconnecting switch meet the closing conditions by determining the fault type. If the electronic switch and the disconnecting switch meet the closing conditions, a reclosing operation is performed on them. This avoids reclosing operations when a fault in the solid-state circuit breaker circuit is not eliminated or a permanent fault occurs, which could damage the solid-state circuit breaker or the external load, effectively ensuring the safe use of the solid-state circuit breaker and the external load.

[0105] This application embodiment also provides another possible implementation of the reclosing control method, which, before determining the fault type based on current data, voltage data, temperature data, and a preset threshold, further includes:

[0106] If the disconnector is opened, the disconnector is closed by controlling the opening and closing operation mechanism.

[0107] Specifically, when the control unit detects that the electronic switch is open, or that both the electronic switch and the disconnector are open, it determines that a fault has occurred in the main circuit. The control unit determines the level of the fault type based on the opening status of the electronic switch and the disconnector. The fault type levels can include: Level 1 fault type: electronic switch open, disconnector not open; Level 2 fault type: both electronic switch and disconnector are open. When the fault type is determined to be a Level 2 fault, the control unit will send a closing control signal to the closing operation mechanism in the opening and closing operation mechanism, so as to control the disconnector to perform the closing operation through the closing operation mechanism.

[0108] This application also provides another possible implementation of the reclosing control method. Figure 4 This is a second schematic flowchart of a reclosing control method provided in an embodiment of this application, as shown below. Figure 4As shown, after determining the fault type based on current data, voltage data, temperature data, and preset thresholds, the process also includes:

[0109] S201. If the current mode is automatic closing, check whether the fault has been eliminated according to the fault type and determine whether the closing conditions are met.

[0110] S202. If the current mode is not allowed to automatically close the circuit breaker, send fault type information to the remote terminal.

[0111] Depending on different scenarios or safety requirements, the circuit breaker mode can be pre-configured or flexibly adjusted. In this embodiment, the control unit determines the fault type based on current data, voltage data, and preset thresholds, and then determines the current closing mode. If the current setting is to allow automatic closing, the control unit checks whether the fault has been eliminated based on the fault type. If the fault has been eliminated, the control unit determines that the electronic switch and disconnector meet the closing conditions; if the fault has not been eliminated, the control unit determines that the electronic switch and disconnector do not meet the closing conditions.

[0112] If the current setting does not allow automatic closing, the system will detect whether the fault has been cleared based on the fault type. Regardless of whether the fault has been cleared, the system will only send the fault type information to the remote terminal and will not perform a closing operation on the electronic switch.

[0113] This application also provides another possible implementation of the reclosing control method. Figure 5 This is the third flowchart illustrating a reclosing control method provided in an embodiment of this application, as shown below. Figure 5 As shown, if the current mode is automatic closing, the system checks whether the fault has been cleared based on the fault type and determines whether the closing conditions are met, including:

[0114] S301. If the fault type is a Class I fault, then check whether the Class I fault has been eliminated.

[0115] The first category of faults includes overload faults and short-circuit faults.

[0116] If the control unit determines that the fault in the main circuit is a Class I fault based on the current and voltage data collected by the metering unit, the control unit uses the fault handling method corresponding to the Class I fault to detect whether the Class I fault has been eliminated.

[0117] S302. If the first type of fault is eliminated, the first type of fault is determined to be a transient fault, and whether to close the circuit is determined according to the preset conditions.

[0118] S303. If the preset conditions indicate automatic closing, control the electronic switch to perform the closing operation and send a closing success message to the remote terminal; or, if the preset conditions do not allow automatic closing, send a closing condition satisfaction indication message to the remote terminal.

[0119] Specifically, after the control unit detects the elimination of the first type of fault by using the fault handling method corresponding to the first type of fault, it determines that the first type of fault is a transient fault and determines whether the preset conditions indicate automatic closing.

[0120] 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 the 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, the control unit sends a closing condition indication message to the remote terminal, indicating that the first type of fault has been eliminated and the closing condition has been met.

[0121] 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 control isolating switch is restored to its initial state.

[0122] The initial state indicator refers to the state of the disconnector before the fault type is determined.

[0123] Specifically, after the control unit detects that the first type of fault has not been eliminated by using the fault handling method corresponding to the first type of fault, it determines that the first type of fault is a permanent fault. If the disconnecting switch was in the open state before the fault type was determined, the control unit sends a opening control signal to the opening operation mechanism of the opening and closing operation mechanism to control the disconnecting switch to perform the opening operation. If the disconnecting switch was in the closed state before the fault type was determined, the control unit sends a closing control signal to the closing operation mechanism of the opening and closing operation mechanism to control the disconnecting switch to perform the closing operation, and sends fault information to the remote terminal for the user to perform manual fault troubleshooting.

[0124] In the method provided in this application embodiment, for a fault type of the first type, the control unit determines whether the first type fault has been eliminated by adopting the fault handling method corresponding to the first type fault. If the first type fault is eliminated, it is determined that the first type fault is a transient fault, and it is determined whether to perform closing according to preset conditions. If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and reclosing information is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, the closing condition indication information is sent to the remote terminal; if the first type fault is not eliminated, it is determined that the first type fault is a permanent fault, fault information is sent to the remote terminal, and the isolating switch is controlled to return to its initial state. By the control unit's determination of whether the first type fault has been eliminated, the electronic switch is closed after the first type fault is eliminated, ensuring the safe use of the solid-state circuit breaker and the external load, and avoiding damage to the solid-state circuit breaker and the external load due to the closing operation.

[0125] This application also provides another possible implementation of the reclosing control method. Figure 6 This is the fourth flowchart illustrating a reclosing control method provided in an embodiment of this application, as shown below. Figure 6 As shown, if the fault type is a Class I fault, then the detection of whether the Class I fault has been eliminated includes:

[0126] S401: Send a preset pulse to the electronic switch to quickly acquire the current and voltage data collected by the metering unit.

[0127] S402. Based on the current data, voltage data and preset threshold collected by the metering unit, determine whether the first type of fault has been eliminated.

[0128] If the first type of fault is an overload fault, the preset threshold includes the first preset threshold.

[0129] Optionally, if the current data collected by the metering unit is less than the first preset threshold, the first type of fault is determined to be 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, the first type of fault is determined to be eliminated and the first type of fault is determined to be a permanent fault.

[0130] Specifically, if the control unit determines that the first type of fault in the main circuit is an overload fault based on the current and voltage data collected by the metering unit, the control unit uses the fault handling method corresponding to the overload fault to detect whether the overload fault has been eliminated.

[0131] The control unit continuously sends pulse signals to the drive unit to control the on and off of the electronic switch, and quickly turns the electronic switch on and off. The metering unit repeatedly and rapidly measures the circuit current. The control unit compares the measured circuit current data with a first preset threshold, i.e., a preset overload current threshold, to determine whether the overload fault has been eliminated. If the control unit determines that the measured circuit current data is less than the first preset threshold, it determines that the overload fault has been eliminated and that the overload fault is transient. If the control unit determines that the measured circuit current data is greater than or equal to the first preset threshold, it determines that the overload fault has not been eliminated and that the overload fault is permanent.

[0132] If the first type of fault is a short circuit fault, the preset threshold includes the second preset threshold.

[0133] 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 the second preset threshold, then the first type of fault is determined to be 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, then the first type of fault is determined to be eliminated, and the first type of fault is determined to be a permanent fault.

[0134] Specifically, if the control unit determines that the first type of fault in the main circuit is a short circuit fault based on the current and voltage data collected by the metering unit, the control unit will detect whether the short circuit fault has been eliminated by using the fault handling method corresponding to the short circuit fault.

[0135] The control unit continuously sends pulse signals to the drive unit to control the on and off of the electronic switch, and quickly turns the electronic switch on and off. The metering unit measures the loop current data, the input voltage data on both sides of the electronic switch, and the output voltage data. The control unit compares the input and output voltage data to see if they are close, and compares the measured loop current data with a preset short-circuit current threshold to determine whether the short-circuit fault has been eliminated. If the control unit determines 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 the short-circuit fault is determined to be eliminated, and the overload fault is determined to be transient. If the control unit determines 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 the short-circuit fault is determined to be not eliminated, and the overload fault is determined to be permanent.

[0136] It should be noted that, for the first type of fault, the number and width of pulse signals sent by the control unit to the drive unit can be set differently for different first type of faults, so that the current and voltage data collected by the metering unit can be obtained when the first type of fault is an overload fault, and the current and voltage data collected by the metering unit can be obtained when the first type of fault is a short circuit fault.

[0137] This application also provides another possible implementation of the reclosing control method. Figure 7 This is the fifth flowchart illustrating a reclosing control method provided in an embodiment of this application, as shown below. Figure 7 As shown, if the current mode is automatic closing, the system checks whether the fault has been cleared based on the fault type and determines whether the closing conditions are met, including:

[0138] S501. If the fault type is a second type of fault, then the second type of fault is determined to be a stage fault, and the second type of fault is checked to see if it has been eliminated.

[0139] The second category of faults includes: high temperature faults, overvoltage faults, and undervoltage faults.

[0140] If the control unit determines that the fault in the main circuit is a second-type fault based on the current, voltage, or temperature data collected by the metering unit, it judges the second-type fault as a stage fault and uses the fault handling method corresponding to the second-type fault to detect whether the second-type fault has been eliminated.

[0141] S502. If the second type of fault is eliminated, determine whether to close the circuit breaker according to the preset conditions.

[0142] S503. If the preset conditions indicate automatic closing, control the electronic switch to perform the closing operation and send a closing success message to the remote terminal; or, if the preset conditions do not allow automatic closing, send a closing condition satisfaction indication message to the remote terminal.

[0143] Specifically, the control unit detects the elimination of the second type of fault by using the fault handling method corresponding to the second type of fault, and then determines whether the preset conditions indicate automatic closing.

[0144] 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 the closing operation and sends fault information to the remote terminal. If the second type of fault is eliminated but automatic closing is not allowed, the control unit sends a closing condition indication message to the remote terminal, indicating that the second type of fault has been eliminated and the closing condition has been met.

[0145] 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 control isolating switch is restored to its initial state.

[0146] The initial state indicator refers to the state of the disconnector before the fault type is determined.

[0147] Specifically, after the control unit detects that the second type of fault has not been eliminated by using the fault handling method corresponding to the second type of fault, it determines that the second type of fault is a permanent fault. If the disconnecting switch was in the open state before the fault type was determined, the control unit sends a opening control signal to the opening operation mechanism of the opening and closing operation mechanism to control the disconnecting switch to perform the opening operation. If the disconnecting switch was in the closed state before the fault type was determined, the control unit sends a closing control signal to the closing operation mechanism of the opening and closing operation mechanism to control the disconnecting switch to perform the closing operation, and sends fault information to the remote terminal for the user to perform manual fault troubleshooting.

[0148] In the method provided in this application embodiment, for a fault type of the second category, the second category fault is determined to be a phased fault. The control unit determines whether the second category fault has been eliminated by adopting the fault handling method corresponding to the second category fault. If the second category fault is eliminated, it determines whether to perform closing based on preset conditions. If the preset conditions indicate automatic closing, it controls the electronic switch to perform the closing operation and sends fault information to the remote terminal. Alternatively, if the preset conditions do not allow automatic closing, it sends a closing condition indication information to the remote terminal. If the second category fault is not eliminated, it is determined to be a permanent fault, and fault information is sent to the remote terminal. The disconnecting switch is also controlled to return to its initial state. By determining whether the second category fault has been eliminated by the control unit, the electronic switch is closed after the second category fault is eliminated, ensuring the safe use of the solid-state circuit breaker and the external load, and avoiding damage to the solid-state circuit breaker and the external load due to the closing operation.

[0149] This application also provides another possible implementation of the reclosing control method. Figure 8 This is the sixth flowchart illustrating a reclosing control method provided in this application embodiment, as shown below. Figure 8 As shown, if the fault type is a second type of fault, then the second type of fault is determined to be a staged fault, and it is checked whether the second type of fault has been eliminated, including:

[0150] S601: Obtain current data, voltage data, or temperature data collected by the metering unit according to a preset time interval.

[0151] S602. Based on the current data, voltage data, temperature data and preset thresholds collected by the metering unit, determine whether the second type of fault has been eliminated.

[0152] If the second type of fault is an overvoltage fault, the preset thresholds include the third preset threshold and the fourth preset threshold.

[0153] 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 determined to be a phased fault, and it is detected whether the voltage data collected by the metering unit recovers to the fourth preset threshold. If the voltage data collected by the metering unit recovers to the fourth preset threshold, the second type of fault is determined to be eliminated. If the voltage data collected by the metering unit is greater than the third preset threshold, the second type of fault is determined to be not eliminated and 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.

[0154] Specifically, if the control unit determines that the fault in the main circuit is an overvoltage fault based on the current and voltage data collected by the metering unit, the control unit uses the fault handling method corresponding to the overvoltage fault to check whether the overvoltage fault has been eliminated.

[0155] The control unit detects the input voltage data in the main circuit through the metering unit at preset time intervals. The control unit compares the input voltage data with a third preset threshold, i.e., the preset maximum allowable threshold voltage, to determine whether the overvoltage fault has been eliminated. If the control unit determines that the input voltage data is less than or equal to the third preset threshold, i.e., the preset maximum allowable threshold voltage, the overvoltage fault is determined to be a temporary fault, and detection continues until the input voltage returns to normal, i.e., returns to the fourth preset threshold, and the overvoltage fault is determined to be eliminated. If the control unit determines that the input voltage data is greater than the third preset threshold, i.e., the preset maximum allowable threshold voltage, the overvoltage fault is determined to be a permanent fault. Alternatively, if the control unit detects the input voltage data in the main circuit through the metering unit at preset time intervals and repeatedly experiences overvoltage recovery followed by a recurrence of the fault after the electronic switch is closed, the voltage is determined to be unstable, and the fault is determined to be permanent.

[0156] If the second type of fault is an undervoltage fault, the preset threshold includes the fifth preset threshold.

[0157] Optionally, if the voltage data collected by the metering unit recovers to the fifth preset threshold, the second type of fault is determined to be a phased fault. If the second type of fault is determined to be a phased fault, the second type of fault is determined to be a permanent fault.

[0158] Specifically, if the control unit determines that the fault in the main circuit is an undervoltage fault based on the current and voltage data collected by the metering unit, the control unit uses the fault handling method corresponding to the undervoltage fault to detect whether the undervoltage fault has been eliminated.

[0159] The control unit detects the input voltage data in the main circuit through the metering unit at preset time intervals. The control unit compares the input voltage data with a fifth preset threshold to determine whether the undervoltage fault has been eliminated. The control unit continues detection; if the input voltage data recovers to the fifth preset threshold (i.e., the preset threshold voltage), the undervoltage fault is determined to be eliminated. However, if, during the control unit's detection of the input voltage data in the main circuit at preset time intervals, multiple instances occur where the undervoltage recovers but the fault recurs after the electronic switch is closed, the voltage is determined to be unstable and constitutes a permanent fault.

[0160] If the second type of fault is a high temperature fault, the preset threshold includes the sixth preset threshold.

[0161] Optionally, if the second type of fault is determined to be a phased fault, and the temperature data collected by the metering unit recovers to the sixth preset threshold, then the second type of fault is determined to be eliminated; if the second type of fault is eliminated and then a fault occurs again within a preset time, then the second type of fault is determined to be a permanent fault.

[0162] Specifically, if the control unit determines that the fault in the main circuit is a high-temperature fault based on the temperature data collected by the metering unit, the control unit uses the fault handling method corresponding to the temperature fault to detect whether the temperature fault has been eliminated.

[0163] The control unit monitors the temperature data in the main circuit via a metering unit at preset time intervals. The control unit compares the temperature data with a preset temperature threshold to determine if the high-temperature fault has been eliminated. If the control unit determines that the temperature data does not meet the sixth preset threshold, it continues monitoring until the temperature returns to the sixth preset threshold, at which point the high-temperature fault is considered eliminated. If, during the control unit's monitoring of the temperature data in the main circuit via the metering unit at preset time intervals, multiple instances occur where the high temperature recovers but the fault recurs after the electronic switch is closed, the fault is determined to be permanent.

[0164] This application also provides another possible implementation of the reclosing control method. Figure 9 This is the seventh flowchart illustrating a reclosing control method provided in this application embodiment, as shown below. Figure 9 As shown, in one scenario, the closing is remotely controlled by a staff member. Optionally, if the current mode is not allowed to automatically close, after sending the fault type information to the remote terminal, the following is also included:

[0165] S701, Receive fault check instructions sent by remote terminal.

[0166] 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 conditions indicate that automatic closing is not allowed, it only sends closing condition indication information to the remote terminal. This allows the remote terminal to send a fault detection indication to the control unit based on the received closing condition indication information, thereby enabling the control unit to receive the fault inspection indication sent by the remote terminal.

[0167] Alternatively, when the main circuit of the solid-state circuit breaker is not faulty and is in a non-operating state, the remote terminal sends a fault detection instruction to the control unit to wake up the solid-state circuit breaker, causing the disconnecting switch and electronic switch in the solid-state circuit breaker to close, so that the control unit can receive the fault check instruction sent by the remote terminal.

[0168] S702. After receiving the fault inspection instruction, check whether the fault elimination has been completed.

[0169] S703. If the fault clearance judgment is completed, the electronic switch is closed.

[0170] S704. If the fault clearance judgment is not completed, check whether the fault has been cleared according to the fault type and determine whether the closing conditions are met.

[0171] Specifically, the control unit detects whether the fault elimination judgment has been completed, that is, to determine 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 the fault has been eliminated or not eliminated.

[0172] If the fault has been determined to be eliminated, meaning the fault meets the closing conditions, the control unit sends a closing control signal to the drive unit to control the electronic switch to perform the closing operation.

[0173] If the fault is not eliminated, the control unit determines the fault type based on the current and voltage data collected by the metering unit, and checks whether the fault has been eliminated and whether the closing conditions are met. The specific judgment process is described in detail in steps S101-S602 above, and will not be repeated here.

[0174] This application also provides another possible implementation of the reclosing control method. Figure 10 This is the eighth flowchart illustrating a reclosing control method provided in this application embodiment, as shown below. Figure 10 As shown, after receiving the fault check instruction sent by the remote terminal, the process includes:

[0175] S801. Obtain the reason for tripping based on the fault detection indication.

[0176] S802. If the tripping reason is fault tripping, check whether the fault clearance has been completed.

[0177] In this embodiment, the control unit determines the cause of the solid-state circuit breaker tripping based on the received fault check instruction. The cause of tripping may include fault tripping and non-fault tripping. If the cause of tripping is fault tripping, it indicates that a fault has occurred in the main circuit of the solid-state circuit breaker. After the control unit determines the fault type, since the preset conditions indicate that automatic closing is not allowed, it only sends closing condition instruction information to the remote terminal. This allows the remote terminal to send a fault detection instruction to the control unit based on the received closing condition instruction information, instructing the control unit to perform fault detection and allow automatic closing.

[0178] S803. If the tripping reason is not a fault tripping, then control the electronic switch to close.

[0179] If the non-fault tripping indicator indicates that the main circuit of the solid-state circuit breaker has not experienced a fault and is in a non-operating state, then the indicator control unit will control the isolating switch and electronic switch to perform a closing operation.

[0180] When the current mode allows automatic closing, this application embodiment also provides a possible implementation of the reclosing control method. Figure 11 This is the ninth flowchart illustrating a reclosing control method provided in an embodiment of this application, as shown below. Figure 11As shown, the method includes:

[0181] S901. If the electronic switch is tripped, or both the electronic switch and the disconnecting switch are tripped, the current data, voltage data, or temperature data collected by the metering unit shall be obtained.

[0182] S902. If the disconnecting switch is opened, the disconnecting switch is closed by controlling the opening and closing operation mechanism.

[0183] S903. Determine the fault type based on current data, voltage data, temperature data, and preset thresholds.

[0184] S904. If the current mode is automatic closing, check whether the fault has been eliminated according to the fault type and determine whether the closing conditions are met.

[0185] S905. If the fault type is a Class I fault, then check whether the Class I fault has been eliminated.

[0186] S906. If the fault type is a second type of fault, then the second type of fault is determined to be a stage fault, and the second type of fault is checked to see if it has been eliminated.

[0187] S907. If the first type of fault is eliminated, the first type of fault is determined to be a transient fault, and whether to close the circuit is determined according to the preset conditions.

[0188] S908. If the second type of fault is eliminated, determine whether to close the circuit breaker according to the preset conditions.

[0189] S909. If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation and a closing success message is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message is sent to the remote terminal.

[0190] S910. 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 control isolating switch is restored to its initial state.

[0191] 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 control isolating switch is restored to its initial state.

[0192] Specifically, the contents of steps S901-S911 have been explained in detail in S101-S602 above, and will not be repeated here.

[0193] When the current mode is not allowed to automatically close, this application embodiment also provides a possible implementation of the reclosing control method. Figure 12 This is the tenth flowchart illustrating a reclosing control method provided in an embodiment of this application. Figure 12 As shown, the method includes:

[0194] S1001, Receive fault check instructions sent by remote terminal.

[0195] S1002. Obtain the reason for tripping based on the fault detection indication.

[0196] S1003. If the tripping reason is fault tripping, check whether the fault clearance judgment is completed.

[0197] S1004. If the fault clearance judgment is completed, the electronic switch is closed.

[0198] S1005. If the fault clearance judgment is not completed, check whether the fault has been cleared according to the fault type and determine whether the closing conditions are met.

[0199] S1006. If the tripping is not due to a fault, then the electronic control switch will be closed.

[0200] The process of checking whether the fault has been eliminated based on the fault type and determining whether the closing conditions are met is similar to steps S901-S911 above, and will not be repeated here.

[0201] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A solid-state circuit breaker device, characterized in that, include: The device comprises a disconnecting switch, an electronic switch, a closing / opening mechanism, a control unit, a metering unit, a drive unit, and a current sampling component; wherein, the input terminal of the disconnecting switch is connected to a preset power supply, the control terminal of the disconnecting switch is connected to the control unit through the closing / opening mechanism, and the output terminal of the disconnecting switch is connected to the electronic switch through the current sampling component. The current acquisition terminal of the metering unit is connected to the output terminal of the current sampling component, one end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the disconnecting switch, the other end of the voltage acquisition terminal of the metering unit is connected to the output terminal of the electronic switch, and the output terminal of the metering unit is connected to the control unit. The control unit is connected to the control terminal of the electronic switch via the drive unit, and the output terminal of the electronic switch is used to connect to an external load. The control unit is used to determine the fault type based on 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 disconnecting switch meet the closing conditions. The control unit is also configured to perform the following steps: If the current mode is automatic closing, then the fault type is checked to see if it has been eliminated and whether the closing conditions are met; if the current mode is not automatic closing, then the fault type information is sent to the remote terminal. If the current mode is automatic closing, then according to the fault type, it is detected whether the fault has been eliminated and whether the closing conditions are met, including: If the fault type is the second type, then the second type of fault is determined to be a phased fault, and it is checked whether the second type of fault has been eliminated. The second type of fault includes: high temperature fault, overvoltage fault, and undervoltage fault. If the second type of fault is eliminated, it is determined whether to perform closing according to preset conditions. If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and a closing success message is sent to the remote terminal. Alternatively, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message is sent to the remote terminal. If the second type of fault is not eliminated, then the second type of fault is determined to be a permanent fault, and fault information is sent to the remote terminal. The disconnecting switch is controlled to return to its initial state, where the initial state indicates the state of the disconnecting switch before the fault type was determined. If the fault type is the second type of fault, then the second type of fault is determined to be a staged fault, and it is checked whether the second type of fault has been eliminated, including: The metering unit collects current data, voltage data, or temperature data at preset time intervals; based on the collected current data, voltage data, temperature data, and preset threshold, it is determined whether the second type of fault has been eliminated. The second type of fault is an overvoltage fault. The preset threshold includes a third preset threshold and a fourth preset threshold. The step of determining whether the second type of fault has been eliminated based on 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, then the second type of fault is determined to be a phased fault, and it is detected whether the voltage data collected by the metering unit recovers to the fourth preset threshold. If the voltage data collected by the metering unit recovers to the fourth preset threshold, then the second type of fault is determined to be eliminated. If the voltage data collected by the metering unit is greater than the third preset threshold, then the second type of fault is determined to be not 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, then the second type of fault is determined to be a permanent fault. If the current mode is not allowed to automatically close, after sending the fault type information to the remote terminal, the method further includes: The system receives a fault check instruction sent by the remote terminal; after receiving the fault check instruction, it checks whether the fault elimination judgment is completed; if the fault elimination judgment is completed, it controls the electronic switch to close; if the fault elimination judgment is not completed, it checks whether the fault is eliminated according to the fault type and determines whether the closing conditions are met. After receiving the fault check instruction sent by the remote terminal, the process includes: The cause of the circuit breaker tripping is obtained according to the fault inspection indication; if the cause of the circuit breaker tripping is fault tripping, the fault elimination is checked to see if the judgment is completed; if the cause of the circuit breaker tripping is not fault tripping, the electronic switch is controlled to close.

2. The apparatus as claimed in claim 1, characterized in that, The opening and closing operation mechanism includes an opening operation mechanism and a closing operation mechanism. One end of the opening operation mechanism is connected to the disconnecting switch, and the control end of the opening operation mechanism is connected to the control unit. One end of the closing operation mechanism is connected to the disconnecting switch, and the control end of the closing operation mechanism is connected to the control unit.

3. A reclosing control method, characterized in that, The method, applied to the control unit in the solid-state circuit breaker device according to claim 1 or 2, comprises: If the electronic switch is tripped, or if both the electronic switch and the isolating switch are tripped, the current data, voltage data, or temperature data collected by the metering unit are quickly acquired. Based on the current data, voltage data, temperature data, and preset threshold, the fault type is determined, wherein the fault type is used to analyze whether the electronic switch and the disconnecting switch meet the closing conditions; After determining the fault type based on the current data, voltage data, temperature data, and preset threshold, the method further includes: If the current mode is automatic closing, then the fault type is used to check whether the fault has been eliminated and to determine whether the closing conditions are met. If the current mode is not allowed to automatically close, then send the fault type information to the remote terminal; If the current mode is automatic closing, then according to the fault type, it is detected whether the fault has been eliminated and whether the closing conditions are met, including: If the fault type is the second type, then the second type of fault is determined to be a phased fault, and it is checked whether the second type of fault has been eliminated. The second type of fault includes: high temperature fault, overvoltage fault and undervoltage fault. If the second type of fault is eliminated, determine whether to close the circuit breaker based on preset conditions; If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and a closing success message is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message 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. The disconnecting switch is then controlled to return to its initial state, wherein the initial state indicates the state of the disconnecting switch before the fault type was determined. If the fault type is the second type of fault, then the second type of fault is determined to be a staged fault, and it is checked whether the second type of fault has been eliminated, including: The current, voltage, or temperature data collected by the metering unit are acquired according to a preset time interval. Based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold, it is determined whether the second type of fault has been eliminated; The second type of fault is an overvoltage fault. The preset threshold includes a third preset threshold and a fourth preset threshold. The step of determining whether the second type of fault has been eliminated based on 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, then the second type of fault is determined to be a stage fault, and it is detected whether the voltage data collected by the metering unit has recovered to the fourth preset threshold. If the voltage data collected by the metering unit has recovered to the fourth preset threshold, then the second type of fault is determined to be 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 that the second type of fault is a permanent fault. If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault. If the current mode is not allowed to automatically close, after sending the fault type information to the remote terminal, the method further includes: Receive the fault check instruction sent by the remote terminal; After receiving the fault check instruction, check whether the fault elimination has been completed; If the fault clearance judgment is completed, then control the electronic switch to close; If the fault clearance judgment is not completed, check whether the fault has been cleared according to the fault type and determine whether the closing conditions are met. After receiving the fault check instruction sent by the remote terminal, the process includes: The reason for the circuit breaker tripping is determined based on the fault inspection indication; If the reason for the circuit breaker tripping is a fault tripping, then check whether the fault clearance has been completed. If the reason for the tripping is not a fault tripping, then control the electronic switch to close.

4. The method as described in claim 3, characterized in that, Before determining the fault type based on the current data, voltage data, temperature data, and a preset threshold, the method further includes: If the disconnecting switch is opened, the disconnecting switch is closed by the opening and closing operation mechanism.

5. The method as described in claim 3, characterized in that, If the current mode is automatic closing, then according to the fault type, it is detected whether the fault has been eliminated and whether the closing conditions are met, including: If the fault type is a first type of fault, then check whether the first type of fault has been eliminated. The first type of fault includes: overload fault and short circuit fault. If the first type of fault is eliminated, it is determined that the first type of fault is a transient fault, and whether to close the circuit is determined according to preset conditions. If the preset conditions indicate automatic closing, the electronic switch is controlled to perform the closing operation, and a closing success message is sent to the remote terminal; or, if the preset conditions do not allow automatic closing, a closing condition satisfaction indication message is sent 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 the remote terminal. The disconnecting switch is then controlled to return to its initial state, wherein the initial state indicates the state of the disconnecting switch before the fault type was determined.

6. The method as described in claim 5, characterized in that, If the fault type is a first type of fault, then detecting whether the first type of fault has been eliminated includes: A preset pulse is emitted to the electronic switch to quickly acquire the current and voltage data collected by the metering unit; Based on the current data, voltage data, and preset threshold acquired by the metering unit, it is determined whether the first type of fault has been eliminated.

7. The method as described in claim 6, characterized in that, The first type of fault is an overload fault. The preset threshold includes a first preset threshold. The step of determining whether the first type of fault has been eliminated based on the current data and 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, then it is determined that the first type of fault has been eliminated and that the first type of fault is 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.

8. The method as described in claim 6, characterized in that, The first type of fault is a short-circuit fault. The preset threshold includes a second preset threshold. The step of determining whether the first type of fault has been eliminated based on the current data and 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, then the first type of fault is determined to be 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, then 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 as described in claim 3, characterized in that, The second type of fault is an undervoltage fault. The preset threshold includes a fifth preset threshold. The step of determining whether the second type of fault has been eliminated based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold includes: If the second type of fault is determined to be a phased fault, and the voltage data collected by the metering unit recovers to the fifth preset threshold, then the second type of fault is determined to be eliminated. If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault.

10. The method as described in claim 3, characterized in that, The second type of fault is a high-temperature fault. The preset threshold includes a sixth preset threshold. The step of determining whether the second type of fault has been eliminated based on the current data, voltage data, temperature data collected by the metering unit and the preset threshold includes: If the second type of fault is determined to be a phased fault, and the temperature data collected by the metering unit recovers to the sixth preset threshold, then the second type of fault is determined to be eliminated. If the second type of fault reappears within a preset time after the second type of fault has been eliminated, then the second type of fault is determined to be a permanent fault.

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