Switching circuit of power distribution network and control method, device and medium thereof

Abstract

This invention proposes a circuit for opening and closing circuits in a power distribution network, along with its control method, device, and medium. The system includes: a primary-side actuator, communicatively connected to the power distribution network for controlling the network's opening and closing; a terminal processor for issuing opening and closing control signals; and multiple opening and closing transmission components, all connected in parallel. Each transmission component includes a series-connected optocoupler, a controllable switch, and a relay element. All optocouplers are connected in parallel, forming an optocoupler group. The input of the optocoupler group is communicatively connected to the output of the terminal processor. All relay elements are connected in parallel, forming a relay group. The output of the relay group is communicatively connected to the primary-side actuator. According to the technical solution of this invention, the primary-side actuator can be driven in parallel by multiple optocouplers and relay elements, achieving highly reliable output of the opening and closing control signals.

Description

Technical Field

[0001] This invention relates to the field of power distribution network technology, and in particular to a switching circuit for power distribution networks and its control method, device and medium. Background Technology

[0002] With the continuous advancement of new power system construction, distribution networks are characterized by dispersed access points, complex operation modes, and diverse fault types, placing higher demands on fault isolation speed and power restoration capabilities. Distribution network rapid protection and self-healing control technologies, represented by feeders, are gradually evolving from centralized control towards distributed, terminalized, and communication-based approaches. Traditional distributed protection schemes relying on fiber optics or wired private networks suffer from high construction costs, high construction difficulty, and insufficient flexibility when deployed on a large scale, making it difficult to meet the needs of rapid self-healing and large-scale application in distribution networks.

[0003] With the application of new low-power wide-area communication technologies such as 5G Reduced Capability (5G RedCap) in the power industry, distributed protection terminals are gradually realizing status transmission, protection coordination, and self-healing control wirelessly, placing higher demands on the real-time performance and reliability of the terminal's local execution link. In existing technologies, the opening and closing control signals are typically driven by the secondary terminal's main control chip through devices such as optocouplers and relays to the primary-side actuator. In this process, if a single optocoupler or relay fails, the opening and closing control signals may not be effectively executed, thus affecting the reliability of rapid fault isolation and self-healing control in the distribution network. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a circuit for opening and closing circuits in a power distribution network, as well as its control method, device, and medium, which can drive the primary-side actuator in parallel through multiple optocouplers and relay elements to achieve highly reliable output of the opening and closing control signal.

[0005] In a first aspect, embodiments of the present invention provide a circuit breaker for a power distribution network, the circuit breaker being communicatively connected to the power distribution network, the circuit breaker comprising: A primary-side actuator is communicatively connected to the power distribution network and is used for switching control of the power distribution network. A terminal processor, used to send out opening and closing control signals; Multiple circuit breaker opening and closing transmission components are connected in parallel. Each circuit breaker opening and closing transmission component includes an optocoupler, a controllable switch, and a relay element connected in series. All the optocouplers are connected in parallel to form an optocoupler group. The input end of the optocoupler group is communicatively connected to the output end of the terminal processor. All the relay elements are connected in parallel to form a relay group. The output end of the relay group is communicatively connected to the primary side actuator. The relay group is used to drive the primary side actuator to complete the circuit breaker opening and closing operation. The circuit breaker opening and closing transmission component is used to send the circuit breaker opening and closing control signal to the primary side actuator.

[0006] According to some embodiments of the present invention, it further includes: a sampling unit, which is communicatively connected to the primary-side actuator and the terminal processor, respectively, and the sampling unit is used to sample the operating status of the primary side of the distribution network; The terminal processor includes a 5G lightweight communication module, which is communicatively connected to the main station and / or adjacent terminals.

[0007] According to some embodiments of the present invention, the optocoupler includes a light-emitting diode (LED) and a phototransistor. The positive terminal of the LED is communicatively connected to the output terminal of the terminal processor, the negative terminal of the LED is grounded, the collector of the phototransistor is electrically connected to a first power supply voltage, and the emitter of the phototransistor is electrically connected to the controllable switch.

[0008] According to some embodiments of the present invention, the controllable switch is electrically connected to one end of the coil side of the relay element, the other end of the coil side of the relay element is grounded, one end of the contact side of the relay element is electrically connected to a second power supply voltage, and the other end is communicatively connected to the primary side actuator.

[0009] In a second aspect, embodiments of the present invention provide a control method for the switching circuit of a power distribution network, applied to the switching circuit of the power distribution network described in the first aspect, the method comprising: The terminal processor sends a circuit breaker control signal to the optocoupler group. When at least one optocoupler device in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group. The relay group receives a high-level signal. When at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary side actuator. The primary-side actuator is triggered by a high-level signal and performs on / off control of the power distribution network.

[0010] According to some embodiments of the present invention, it further includes: a sampling unit, which is communicatively connected to the primary-side actuator and the terminal processor, respectively, and the sampling unit is used to sample the operating status of the primary side of the distribution network; wherein, the terminal processor includes a 5G lightweight communication module, which is communicatively connected to the master station and / or adjacent terminals; Before the terminal processor sends the opening and closing control signal to the optocoupler group, it also includes: The terminal processor obtains the real-time status of the primary side of the distribution network from the sampling unit. When the real-time status of the primary side of the distribution network is abnormal, the terminal processor generates the opening and closing control signal. Alternatively, the 5G lightweight communication module of the terminal processor obtains a self-healing control instruction from the master station or the adjacent terminal, and generates the opening and closing control signal based on the self-healing control instruction.

[0011] According to some embodiments of the present invention, the optocoupler includes a light-emitting diode and a phototransistor, the positive terminal of the light-emitting diode is communicatively connected to the output terminal of the terminal processor, the negative terminal of the light-emitting diode is grounded, the collector of the phototransistor is electrically connected to a first supply voltage, and the emitter of the phototransistor is electrically connected to the controllable switch; When at least one optocoupler in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group, including: The terminal processor outputs all the opening and closing control signals to all the optocouplers, wherein the opening and closing control signals are high-level signals; Based on any one of the optocouplers, when the light-emitting diode of the optocoupler is in normal working condition, the light-emitting diode emits light based on a high-level signal, and the phototransistor closes based on the light-emitting diode. The first power supply voltage is conducted through the collector of the phototransistor to the relay group connected in series with the optocoupler.

[0012] According to some embodiments of the present invention, the controllable switch is electrically connected to one end of the coil side of the relay element, the other end of the coil side of the relay element is grounded, one end of the contact side of the relay element is electrically connected to a second power supply voltage, and the other end is communicatively connected to the primary side actuator; When at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary-side actuator, including: Based on any one of the relay elements, when the relay element is in normal working condition, the first power supply voltage is applied to the coil side of the relay element, and the contact side of the relay element is engaged; The second power supply voltage is output through the relay element that is activated on the contact side, and the second power supply voltage is conducted to the primary side actuator.

[0013] Thirdly, embodiments of the present invention provide a control device for the opening and closing circuit of a power distribution network, including at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to perform the control method for the opening and closing circuit of the power distribution network as described in the second aspect above.

[0014] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for executing the control method for the opening and closing circuits of a power distribution network as described in the second aspect above.

[0015] The circuit for opening and closing a power distribution network according to an embodiment of the present invention has at least the following advantages: a primary-side actuator, which is communicatively connected to the power distribution network and is used to control the opening and closing of the power distribution network; a terminal processor, which is used to send opening and closing control signals; and multiple opening and closing transmission components, all of which are connected in parallel. Each opening and closing transmission component includes an optocoupler, a controllable switch, and a relay element connected in series. All of the optocouplers are connected in parallel and form an optocoupler group. The input end of the optocoupler group is communicatively connected to the output end of the terminal processor. All of the relay elements are connected in parallel and form a relay group. The output end of the relay group is communicatively connected to the primary-side actuator. The relay group is used to drive the primary-side actuator to complete the opening and closing operation. The circuit for opening and closing transmission components is used to send the opening and closing control signals to the primary-side actuator. According to the technical solution of the present invention, the circuit structure for opening and closing includes multiple parallel opening and closing transmission components. All optocouplers and relay elements in all the opening and closing transmission components are connected in parallel. When the terminal processor sends the opening and closing control signal, and at least one optocoupler is working normally, the optocoupler group can transmit the opening and closing control signal from the terminal processor to the controllable switch. The controllable switch transmits the opening and closing control signal to the relay group. When at least one relay element in the relay group is working normally, the relay group can open the opening and closing control signal from the relay contacts. The primary side actuator can perform switching control on the distribution network based on the acquired opening and closing control signal. That is, the opening and closing circuit of this application improves the high reliability output of the opening and closing control signal. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of a switching circuit provided in one embodiment of the present invention; Figure 2 This is an electrical schematic diagram of multiple opening and closing transmission components provided in another embodiment of the present invention; Figure 3 This is an electrical schematic diagram provided by another embodiment of the present invention when the number of opening and closing transmission components is two; Figure 4 This is a schematic diagram illustrating the propagation speed of each signal during a specific opening and closing operation, provided in another embodiment of the present invention. Figure 5 This is a flowchart of a control method for the opening and closing circuit of a power distribution network provided in another embodiment of the present invention; Figure 6 This is a structural diagram of a control device for the opening and closing circuit of a power distribution network provided in another embodiment of the present invention. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do 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. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] This invention provides a circuit for opening and closing circuits in a power distribution network, along with its control method, apparatus, and medium. The circuit includes: a primary-side actuator communicatively connected to the power distribution network for controlling the opening and closing of the network; a terminal processor for issuing opening and closing control signals; and multiple opening and closing transmission components connected in parallel. Each transmission component includes a series-connected optocoupler, a controllable switch, and a relay element. All optocouplers are connected in parallel, forming an optocoupler group. The input of the optocoupler group is communicatively connected to the output of the terminal processor. All relay elements are connected in parallel, forming a relay group. The output of the relay group is communicatively connected to the primary-side actuator, driving it to complete opening and closing operations. The circuit for opening and closing transmission components sends the opening and closing control signals to the primary-side actuator. According to the technical solution of the present invention, the circuit structure for opening and closing includes multiple parallel opening and closing transmission components. All optocouplers and relay elements in all the opening and closing transmission components are connected in parallel. When the terminal processor sends the opening and closing control signal, and at least one optocoupler is working normally, the optocoupler group can transmit the opening and closing control signal from the terminal processor to the controllable switch. The controllable switch transmits the opening and closing control signal to the relay group. When at least one relay element in the relay group is working normally, the relay group can open the opening and closing control signal from the relay contacts. The primary side actuator can perform switching control on the distribution network based on the acquired opening and closing control signal. That is, the opening and closing circuit of this application improves the high reliability output of the opening and closing control signal.

[0022] First, refer to Figures 1 to 3 The switching circuit of the distribution network 100 provided in this application embodiment is communicatively connected to the distribution network 100, and includes: The primary actuator 10 is communicatively connected to the distribution network 100 and is used to control the opening and closing of the distribution network 100. Terminal processor 20 is used to send out opening and closing control signals; Multiple opening and closing transmission components are connected in parallel. Each opening and closing transmission component includes optocouplers, controllable switches, and relays connected in series. All optocouplers are connected in parallel to form an optocoupler group 30. The input of the optocoupler group 30 is communicatively connected to the output of the terminal processor 20. All relays are connected in parallel to form a relay group 40. The output of the relay group 40 is communicatively connected to the primary side actuator 10. The relay group 40 is used to drive the primary side actuator 10 to complete the opening and closing operation. The opening and closing transmission components are used to send the opening and closing control signals to the primary side actuator 10.

[0023] It should be noted that the terminal processor 20 is the core control unit of the protection and self-healing control terminal. When it is necessary to perform local opening and closing actions, the terminal processor 20 sends opening and closing control commands to the opening and closing circuit.

[0024] It should be noted that the optocoupler group 30 is composed of multiple optocoupler devices. The input terminal of the optocoupler group 30 is connected in parallel to the output terminal of the terminal processor 20. The output terminal of the terminal processor 20 is the control signal output port. The optocoupler group 30 is used to realize electrical isolation between the terminal processor 20 and the subsequent drive circuit, and to provide multiple redundant control paths.

[0025] It should be noted that the relay group 40 is composed of multiple relay elements, and each relay is communicatively connected to the output side of the optocoupler group 30. The relay group 40 is used to drive the primary side actuator 10 to complete the opening and closing operation.

[0026] It should be noted that the primary side actuator 10 includes opening and closing coils, switching components and arc extinguishing devices, etc. The primary side actuator 10 is used to perform fast and reliable opening and closing control on the distribution network 100.

[0027] It should be noted that distribution network 100 is an electrical power transmission network, and under normal circumstances, the current in distribution network 100 is a stable sine wave.

[0028] Reference Figure 2 , Figure 2 This is an electrical schematic diagram of multiple opening and closing transmission components provided in another embodiment of the present invention. Based on different application scenarios and terminal reliability requirements of the distribution network 100, the number of optocouplers in the optocoupler group 30 and the number of relay elements in the relay group 40 are increased, thereby increasing the total number of opening and closing transmission components composed of the optocoupler group 30, all controllable switches, and the relay group 40. This expands the parallel opening and closing transmission components into a multi-path parallel structure. With the increase in the number of parallel paths, the reliability and response speed of the opening and closing circuit are further improved, making it suitable for key node terminals in the distribution network 100 with high requirements for power supply reliability and timely operation.

[0029] For example, refer to Figure 3 and Figure 4 , Figure 3 This is an electrical schematic diagram provided by another embodiment of the present invention when the number of opening and closing transmission components is two; Figure 4 This is a schematic diagram illustrating the propagation speed of various signals during a specific opening and closing operation, provided in another embodiment of the present invention; assuming... Figure 3 The propagation speed of each signal in the data is as follows: Figure 4 As shown. The time required for the terminal processor 20 to reach the optocoupler U1 is 500 ns (nanoseconds), the time required for the terminal processor 20 to reach the optocoupler U2 is 500 ns, the time required for the optocoupler U1 to reach the relay element K1 is 500 ns, the time required for the optocoupler U1 to reach the relay element K2 is 450 ns, the time required for the optocoupler U2 to reach the relay element K1 is 500 ns, the time required for the optocoupler U2 to reach the relay element K2 is 500 ns, the time required for the relay element K1 to reach the signal output is 480 ns, and the time required for the relay element K2 to reach the signal output is 500 ns. It is easy to see that the fastest path for transmitting the opening and closing control signal is terminal processor 20—optocoupler U1—relay element K2—signal output, requiring only 1.45 μs (microseconds). The fastest transmission path appears for each signal output, which is much faster than the traditional method using only one optocoupler and one relay element. This feature, combined with the low latency and high reliability of 5G RedCap communication, is conducive to building an end-to-end rapid protection and self-healing control system.

[0030] This invention addresses the application requirements of fast protection and self-healing control terminals for distribution networks based on 5G RedCap mobile communication technology, proposing a multi-channel parallel redundant circuit structure for opening and closing. This invention uses multiple optocouplers and relays to drive the primary-side actuator 10 in parallel, enabling the opening and closing control signal to automatically select the fastest effective path during each operation. This significantly reduces local execution latency at the terminal, fully leveraging the low latency advantage of 5G RedCap communication. Furthermore, it effectively avoids the problem of the opening and closing control signal failing to execute normally due to the failure of a single optocoupler, relay, or control I / O port (i.e., output and output terminals) of the terminal processor 20, significantly improving the reliability and security of the distribution network 100 fast protection and self-healing control terminal in complex operating environments. This invention is applicable to wireless, distributed distribution network 100 protection and self-healing control systems, providing high real-time performance and high reliability terminal execution layer technology support for new distribution networks 100.

[0031] In existing power distribution network 100° fast protection and self-healing control systems, the system terminal typically consists of primary equipment and a secondary control unit. The primary equipment is responsible for power switching, while the secondary control unit collects and analyzes operating status data such as voltage and current. When a fault or abnormal condition is detected, the secondary control unit sends a tripping control command to the primary equipment to achieve fault isolation or power restoration. With the application of new low-power wide-area communication technologies such as 5G Reduced Capability (5G RedCap) in the power industry, distributed protection terminals are gradually realizing status transmission, protection coordination, and self-healing control wirelessly, placing higher demands on the real-time performance and reliability of the terminal's local execution link. In existing technologies, tripping control signals are typically driven by the secondary terminal's main control chip via optocouplers, relays, and other devices to the primary-side actuator 10. In this process, if a single optocoupler or relay fails, the control command may not be effectively executed, thus affecting the reliability of the power distribution network's 100° fault rapid isolation and self-healing control. Simultaneously, the traditional single-channel drive structure has a bottleneck in response speed, making it difficult to fully leverage the overall advantages of the low-latency characteristics of 5G RedCap communication.

[0032] This invention proposes a circuit for opening and closing the circuit of a distribution network 100 fast protection and self-healing control terminal based on 5G RedCap mobile communication technology. While meeting the requirements of wireless communication distributed control, it achieves high-speed response and high-reliability output of opening and closing control commands, thereby improving the safety and stability of the terminal in complex operating environments.

[0033] Additionally, in one embodiment, reference is made to Figure 2 and Figure 3 It also includes: The sampling unit 50 is communicatively connected to the primary side actuator 10 and the terminal processor 20, respectively. The sampling unit 50 is used to sample the operating status of the primary side of the distribution network 100. The terminal processor 20 includes a 5G lightweight communication module, which is connected to the main station and / or adjacent terminals.

[0034] It should be noted that the circuit for opening and closing also includes a sampling unit 50. The terminal processor 20 can collect the operating status of the primary side voltage, current and other parameters of the distribution network 100 in real time through the sampling unit 50, and complete fault detection and criterion calculation based on the built-in protection algorithm. During operation, the sampling unit 50 continuously monitors the operating status of the primary side and sends the collected data to the terminal processor 20.

[0035] It should be noted that the terminal processor 20 includes a 5G lightweight communication module, namely a 5G RedCap communication module. The 5G RedCap communication module enables information exchange with the main station or adjacent terminals to realize distributed protection coordination and the distribution of self-healing control strategies.

[0036] It should be noted that when the terminal processor 20 receives a self-healing control command based on local protection logic or via the 5G RedCap communication module and needs to perform a circuit breaker operation, the processor simultaneously outputs a circuit breaker control signal to the multi-channel optocoupler group 30. Any valid circuit breaker control signal can turn on the corresponding optocoupler device, thereby driving the multi-channel relay group 40 to operate, realizing the rapid circuit breaker operation of the primary side actuator 10.

[0037] Additionally, in one embodiment, reference is made to Figure 2 and Figure 3 The optocoupler includes a light-emitting diode (LED) and a phototransistor. The positive terminal of the LED is connected to the output terminal of the terminal processor 20, the negative terminal of the LED is grounded, the collector of the phototransistor is electrically connected to the first power supply voltage, and the emitter of the phototransistor is electrically connected to the controllable switch.

[0038] It should be noted that when the optocoupler is in normal working condition, after receiving the opening and closing control signal, the LED turns on. This causes the phototransistor to be triggered by the LED, turning on as well. This allows the first supply voltage to be transmitted to the controllable switch via the phototransistor. When the controllable switch is functioning normally and is in the closed state, the first supply voltage is transmitted to the relay element connected in series with the controllable switch.

[0039] Additionally, in one embodiment, reference is made to Figure 2 and Figure 3 The controllable switch is electrically connected to one end of the coil side of the relay element, the other end of the coil side of the relay element is grounded, one end of the contact side of the relay element is electrically connected to the second power supply voltage, and the other end is communicatively connected to the primary side actuator 10.

[0040] It should be noted that when the relay element is in normal working condition, after the first power supply voltage is transmitted to the relay element, the coil end of the relay element is energized, the coil end generates a magnetic field, triggering the contact end to act; the contact end of the relay element is powered by the second power supply voltage, which is the power output end of the relay element. When the coil end is energized and generates a magnetic field, the contact end is attracted, realizing that the second power supply voltage is output through the attracted contact to the primary side actuator 10; when the second power supply voltage is transmitted to the primary side actuator 10, the primary side actuator 10 is triggered, and the primary side actuator 10 performs opening and closing control on the distribution network 100.

[0041] In addition, embodiments of the present invention provide a control method for the opening and closing circuits of a power distribution network, applicable to... Figures 1 to 3 The switching circuit of the distribution network shown in the embodiment is referred to Figure 5 The method includes, but is not limited to, the following steps: S10, the terminal processor sends a circuit breaker control signal to the optocoupler group. When at least one optocoupler device in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group. S20, the relay group receives a high-level signal. When at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary side actuator. S30, the primary side actuator is triggered by a high-level signal, and the primary side actuator performs on-off control of the power distribution network.

[0042] It should be noted that the circuit opening and closing and the control method of the circuit opening and closing of the present invention are applicable to the circuit opening and closing of the distribution network fast protection and self-healing control terminal based on 5GRedCap mobile communication technology. While meeting the requirements of wireless communication distributed control, it realizes the highly reliable output of the circuit opening and closing control command, and improves the safety and stability of the terminal in complex operating environments.

[0043] It should be noted that, referring to Figure 3 When one of the circuit breaker closing and tripping transmission components fails during actual operation, assuming that the optocoupler U1 in the circuit breaker closing and tripping transmission component fails, the controllable unit switch Z1 will be disconnected, and then the signal will be transmitted through the optocoupler U2. The same applies to the failure of the relay element K1 and the output terminal IO1 of the terminal processor. Even if some components fail, as long as the circuit breaker closing and tripping control signal can be guaranteed to have one path, that is, at least one optocoupler, one controllable switch and one relay element are working normally, the circuit breaker closing and tripping control signal can still be output.

[0044] In another embodiment, in step S10, before the terminal processor sends the opening and closing control signal to the optocoupler group, the following steps are included, but are not limited to: S011, the terminal processor obtains the real-time status of the primary side of the distribution network from the sampling unit. When the real-time status of the primary side of the distribution network is abnormal, the terminal processor generates a tripping control signal. S012, or, the 5G lightweight communication module of the terminal processor obtains self-healing control instructions from the main station or adjacent terminals, and generates opening and closing control signals based on the self-healing control instructions.

[0045] It should be noted that the technical principles of how the terminal processor generates opening and closing control signals based on local protection logic or via the 5G RedCap communication module can be found in [reference needed]. Figures 1 to 3 The description of the illustrated embodiments will not be repeated here.

[0046] In another embodiment, in step S10, when at least one optocoupler in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group, which may include, but is not limited to, the following steps: S101, the terminal processor output sends all opening and closing control signals to all optocouplers, wherein the opening and closing control signals are high-level signals; S102, based on any optocoupler device, when the light-emitting diode of the optocoupler device is in normal working condition, the light-emitting diode emits light based on a high-level signal, and the phototransistor closes based on the light-emitting diode. The first supply voltage is conducted through the collector of the phototransistor to the relay group connected in series with the optocoupler element.

[0047] It should be noted that the technical principles of the working logic of optocouplers can be found by referring to [reference needed]. Figures 1 to 3 The description of the illustrated embodiments will not be repeated here.

[0048] In another embodiment, in step S20, when at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary-side actuator, which may include, but is not limited to, the following steps: S201, based on any relay element, when the relay element is in normal working condition, the first power supply voltage is turned on to the coil side of the relay element, and the contact side of the relay element is energized; S202, the second power supply voltage is output through the relay element activated on the contact side, and the second power supply voltage is conducted to the primary side actuator.

[0049] It should be noted that the technical principles of the working logic of relay components can be found by referring to... Figures 1 to 3 The description of the illustrated embodiments will not be repeated here.

[0050] Reference Figure 2 , Figure 2 This is an electrical schematic diagram of multiple opening and closing transmission components provided in another embodiment of the present invention. The opening and closing circuit structure of the present invention includes multiple opening and closing transmission components, that is, it allows multiple control paths to exist in parallel. Even if a fault occurs in the optocoupler, relay element, or the I / O port of the terminal processor communicating with the optocoupler in one path, the remaining paths can still ensure the effective transmission and execution of the opening and closing control signals. (Refer to...) Figure 3Taking two optocouplers and relays as an example, as shown in the figure, the two opening and closing control signals IO1 and IO2 of the terminal processor simultaneously control optocoupler U1 and optocoupler U2. When IO1 sends a high-level signal, the light-emitting diodes in optocoupler U1 and optocoupler U2 light up, and the phototransistor side of optocoupler U1 and optocoupler U2 closes. Similarly, when IO2 sends a high-level signal, the phototransistor side of optocoupler U1 and optocoupler U2 also closes. Subsequently, optocoupler U1 closes, and the first supply voltage of the collector of the phototransistor of optocoupler U1 is conducted to one side of relay elements K1 and K2, causing relay elements K1 and K2 to engage. Similarly, when the first supply voltage of the collector of the phototransistor of optocoupler U2 is conducted to one side of relay elements K1 and K2, relay elements K1 and K2 also engage. Finally, relay elements K1 and K2 are turned on, and the second supply voltage is output through the contacts of relay elements K1 and K2.

[0051] like Figure 6 As shown, Figure 6 This is a structural diagram of a control device for the opening and closing circuit of a power distribution network according to an embodiment of the present invention. The present invention also provides a control device for the opening and closing circuit of a power distribution network, comprising: The processor 401 can be implemented using a general-purpose central processing unit (CPU), microprocessor, application specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 402 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 402 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 402, and the processor 401 calls and executes the control method for the opening and closing circuits of the power distribution network according to the embodiments of this application. Input / output interface 403 is used to implement information input and output; The communication interface 404 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.). Bus 405 transmits information between various components of the device (e.g., processor 401, memory 402, input / output interface 403, and communication interface 404); The processor 401, memory 402, input / output interface 403 and communication interface 404 are connected to each other within the device via bus 405.

[0052] This application embodiment also provides a storage medium, which is a computer-readable storage medium, storing a computer program that, when executed by a processor, implements the control method for the opening and closing circuits of the power distribution network described above.

[0053] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0054] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0055] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A switching circuit for a power distribution network, characterized in that, The circuit breaker is communicatively connected to the power distribution network, and the circuit breaker includes: A primary-side actuator is communicatively connected to the power distribution network and is used for switching control of the power distribution network. A terminal processor, used to send out opening and closing control signals; Multiple circuit breaker opening and closing transmission components are connected in parallel. Each circuit breaker opening and closing transmission component includes an optocoupler, a controllable switch, and a relay element connected in series. All the optocouplers are connected in parallel to form an optocoupler group. The input end of the optocoupler group is communicatively connected to the output end of the terminal processor. All the relay elements are connected in parallel to form a relay group. The output end of the relay group is communicatively connected to the primary side actuator. The relay group is used to drive the primary side actuator to complete the circuit breaker opening and closing operation. The circuit breaker opening and closing transmission component is used to send the circuit breaker opening and closing control signal to the primary side actuator.

2. The switching circuit for a power distribution network according to claim 1, characterized in that, Also includes: A sampling unit is communicatively connected to the primary-side actuator and the terminal processor, respectively, and the sampling unit is used to sample the operating status of the primary side of the distribution network; The terminal processor includes a 5G lightweight communication module, which is communicatively connected to the main station and / or adjacent terminals.

3. The switching circuit for a power distribution network according to claim 1, characterized in that, The optocoupler includes a light-emitting diode (LED) and a phototransistor. The positive terminal of the LED is communicatively connected to the output terminal of the terminal processor, the negative terminal of the LED is grounded, the collector of the phototransistor is electrically connected to a first power supply voltage, and the emitter of the phototransistor is electrically connected to the controllable switch.

4. The switching circuit for a power distribution network according to claim 1, characterized in that, The controllable switch is electrically connected to one end of the coil side of the relay element, the other end of the coil side of the relay element is grounded, one end of the contact side of the relay element is electrically connected to the second power supply voltage, and the other end is communicatively connected to the primary side actuator.

5. A control method for the opening and closing circuits of a power distribution network, characterized in that, The method, applied to the switching circuit of the distribution network according to any one of claims 1 to 4, comprises: The terminal processor sends a circuit breaker control signal to the optocoupler group. When at least one optocoupler device in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group. The relay group receives a high-level signal. When at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary side actuator. The primary-side actuator is triggered by a high-level signal and performs on / off control of the power distribution network.

6. The control method for the opening and closing circuit of a power distribution network according to claim 5, characterized in that, Also includes: A sampling unit is communicatively connected to the primary-side actuator and the terminal processor, respectively. The sampling unit is used to sample the operating status of the primary side of the distribution network. The terminal processor includes a 5G lightweight communication module, which is communicatively connected to the master station and / or adjacent terminals. Before the terminal processor sends the opening and closing control signal to the optocoupler group, it also includes: The terminal processor obtains the real-time status of the primary side of the distribution network from the sampling unit. When the real-time status of the primary side of the distribution network is abnormal, the terminal processor generates the opening and closing control signal. Alternatively, the 5G lightweight communication module of the terminal processor obtains a self-healing control instruction from the master station or the adjacent terminal, and generates the opening and closing control signal based on the self-healing control instruction.

7. The control method for the opening and closing circuit of a power distribution network according to claim 5, characterized in that, The optocoupler includes a light-emitting diode (LED) and a phototransistor. The positive terminal of the LED is communicatively connected to the output terminal of the terminal processor, the negative terminal of the LED is grounded, the collector of the phototransistor is electrically connected to a first power supply voltage, and the emitter of the phototransistor is electrically connected to the controllable switch. When at least one optocoupler in the optocoupler group is turned on, the optocoupler group sends a high-level signal to the relay group, including: The terminal processor outputs all the opening and closing control signals to all the optocouplers, wherein the opening and closing control signals are high-level signals; Based on any one of the optocouplers, when the light-emitting diode of the optocoupler is in normal working condition, the light-emitting diode emits light based on a high-level signal, and the phototransistor closes based on the light-emitting diode. The first power supply voltage is conducted through the collector of the phototransistor to the relay group connected in series with the optocoupler.

8. The control method for the opening and closing circuit of a power distribution network according to claim 7, characterized in that, The controllable switch is electrically connected to one end of the coil side of the relay element, the other end of the coil side of the relay element is grounded, one end of the contact side of the relay element is electrically connected to the second power supply voltage, and the other end is communicatively connected to the primary side actuator. When at least one relay element in the relay group is turned on, the relay group sends a high-level signal to the primary-side actuator, including: Based on any one of the relay elements, when the relay element is in normal working condition, the first power supply voltage is applied to the coil side of the relay element, and the contact side of the relay element is engaged; The second power supply voltage is output through the relay element that is activated on the contact side, and the second power supply voltage is conducted to the primary side actuator.

9. A control device for the opening and closing circuits of a power distribution network, characterized in that, It includes at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions executable by the at least one control processor, which, when executed by the at least one control processor, enable the at least one control processor to perform the control method for the opening and closing circuits of the distribution network as described in any one of claims 5 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the control method for the opening and closing circuits of a power distribution network as described in any one of claims 5 to 8.

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