Analog circuit breaker device and control method based on power distribution network remote control technology

Abstract

The application provides a kind of analog circuit breaker device and control method based on power distribution network remote control technology, including equipment body and external secondary cable;Battery, closing relay and opening relay are provided in equipment body, and charging interface, local / remote conversion switch, closing button and opening button electrically connected with battery are provided;External secondary cable is used to access power distribution network automation system secondary side loop, at least including remote closing input line, remote opening input line and closing and opening state output line;Under local file, button triggers corresponding relay action;Under remote file, remote control instruction triggers corresponding relay action through remote closing input line / remote opening input line, and relay contact end outputs closing state signal or opening state signal to secondary side loop through closing and opening state output line.The technical scheme of the application realizes secondary side remote control transmission and state return, improves the safety and reliability of power distribution automation remote control verification.

Description

Technical Field

[0001] This invention belongs to the field of power system dispatch automation technology, specifically relating to a simulated circuit breaker device and control method based on distribution network remote control technology. Background Technology

[0002] Distribution automation systems are responsible for remote status monitoring and remote control operation of switches in the operation of distribution networks. They can support functions such as remote switching operations in substations, remote fault isolation, and fault analysis, and are an important component of modern distribution network systems.

[0003] Existing power distribution automation systems typically consist of a power distribution automation master station system, a power distribution automation network, power distribution automation terminals, and power distribution automation secondary wiring. These components are connected layer by layer downwards and ultimately connected to the secondary box of the ring network cabinet in the power distribution substation, forming a "three-remote" closed loop with remote signaling, remote measurement, and remote control circuits.

[0004] Distribution automation terminals are deployed on-site to receive remote control messages from the master station and connect the corresponding remote control circuits of the ring network cabinets through execution units. They also collect remote signaling and telemetry information from the substations and upload it to the master station system. As the on-site terminals age, problems such as terminal aging and failures become increasingly prominent, requiring power supply companies to replace and upgrade them. Due to factors such as load characteristics, construction organization, and power outage costs, on-site terminal upgrades are difficult to implement through large-scale power outages; the common need is to implement them under conditions of no power outage or live operation.

[0005] However, according to the operation and maintenance requirements of power distribution automation, remote transmission verification is required after terminal replacement to confirm the correctness of the master station, terminals, and secondary circuits. But, directly performing actual remote control operations under both live and off-line conditions may pose a risk of malfunction and affect user power supply. Therefore, alternative verification methods are often used on-site. However, existing alternative verification methods are insufficient in verifying remote control functions, making it difficult to promptly expose problems in the system links, thus affecting the reliability and automation practicality of the terminal after commissioning. Furthermore, the remote control process may be constrained by conditions such as switch status, further increasing the difficulty of conducting verification under energized conditions.

[0006] Therefore, there is an urgent need for a device that can conduct remote control transmission verification under the condition of no power outage in the substation room, so as to improve the completeness of remote control function verification of the power distribution automation system and the reliability of terminal commissioning. Summary of the Invention

[0007] This invention provides a simulated circuit breaker device based on distribution network remote control technology. The solution constructs a device structure comprising a main body and external secondary cables. The main body includes a battery, closing relay, opening relay, local / remote switch, closing button, and opening button. The external secondary cables are connected to the secondary side circuit of the distribution network automation system and include at least a remote closing input line, a remote opening input line, and a closing / opening status output line. In the local setting, the corresponding relay is triggered by the button; in the remote setting, the corresponding relay is triggered by a remote control command. The relay contacts output a closing status signal or an opening status signal via the closing / opening status output line. This solves the problem of difficulty in covering the remote control link and the risk of misoperation after terminal replacement under conditions of no power outage or power-on.

[0008] In a first aspect, the present invention provides a simulated circuit breaker device based on power distribution network remote control technology, comprising a device body and external secondary cables: The device body includes a housing, a battery disposed within the housing, a relay execution unit, and a charging interface electrically connected to the battery. The relay execution unit includes a closing relay and a opening relay. The device body also includes a local / remote selector switch, a closing button, and a closing button, all mounted on the housing. One end of the external secondary cable is electrically connected to the secondary interface of the device body, and the other end is configured to access the secondary side circuit of the power distribution network automation system; the external secondary cable includes at least a remote closing input line, a remote opening input line, and an opening / closing status output line; When the local / remote selector switch is in the local position, the coil terminals of the closing relay and the opening relay are electrically connected to the closing button and the opening button, respectively. When the local / remote selector switch is in the remote position, the coil terminals of the closing relay and the opening relay are electrically connected to the remote closing input line and the remote opening input line, respectively. The contact terminals of the closing relay and the opening relay are electrically connected to the opening / closing status output line so as to output a closing status signal or an opening status signal representing the switch position to the secondary circuit when the corresponding relay is activated.

[0009] By adopting the above scheme, the present invention provides a simulated circuit breaker device based on distribution network remote control technology. This device incorporates a battery, a closing relay, and a opening relay within its main body, and connects to the secondary circuit of the distribution network automation system via external secondary cables. This enables the simulated circuit breaker device to provide executable closing and opening actions without relying on the actual opening and closing of the primary equipment on-site. By setting a local / remote switching switch, and connecting the closing and opening buttons to the corresponding relay coils in the local position, isolation and switching between the local operation path and the remote control path are achieved. Furthermore, in the remote position, the remote closing input line and remote opening input line are connected to the corresponding relay coils, realizing the input link for remote control commands to trigger relay actions. By electrically connecting the relay contact terminals to the closing / opening status output lines, a closing status signal or an opening status signal is output to the secondary circuit when the corresponding relay operates. This significantly improves the feasibility and integrity of remote control transmission verification for distribution automation under uninterrupted power supply conditions.

[0010] In some embodiments of the present invention, the other end of the external secondary cable is provided with a connector, which is one or more of the following: a ring main unit terminal block connector, a secondary wire clamp connector, or an aviation plug connector.

[0011] In some embodiments of the present invention, the device body is provided with a secondary terminal, one end of the external secondary cable is electrically connected to the secondary terminal, and the secondary terminal constitutes at least a part of the secondary interface.

[0012] In some embodiments of the present invention, the device body further includes a power switch, which is connected in series between the power supply circuit of the battery and the relay execution unit.

[0013] In some embodiments of the present invention, the device body further includes a closing indicator light and a closing indicator light. The closing indicator light is electrically connected to the closing status signal corresponding to the action of the closing relay, and the closing indicator light is electrically connected to the opening status signal corresponding to the action of the opening relay.

[0014] In some embodiments of the present invention, the external secondary cable further includes a remote control common terminal line, which together with the remote connection input line and the remote disconnect input line constitutes a remote control input circuit under the remote position.

[0015] In some embodiments of the present invention, the external secondary cable further includes a remote signaling common terminal line and a handle position line, wherein the handle position line is used to output the position status of the local / remote selector switch to the secondary side circuit.

[0016] Compared with existing technologies, the advantages of this invention are as follows: by setting terminal block connections, secondary clamp connections, or aviation plug connections at the ends of external secondary cables, the device can quickly access and adapt to the secondary interface forms of ring main units in different stations; by setting secondary terminals in the device body as components of secondary interfaces, standardized termination and maintainable wiring of external cables and internal circuits of the device can be achieved; by setting power switch components in series in the power supply circuits of the battery and relay execution unit, on / off control and maintenance isolation of the device's power supply circuit can be achieved; furthermore, by setting closing indicator lights and opening indicator lights and electrically connecting them with corresponding status signals, visual status verification of the local / remote transmission process can be achieved; by adding a remote control common terminal line in the external secondary cables, the remote closing input line, remote opening input line, and common terminal can form a unified remote control input circuit to adapt to different terminal remote control wiring habits; furthermore, by adding a remote signaling common terminal line and a handle position line and outputting the switch position status, the mode status can be synchronously sent up in the secondary side circuit, significantly improving the standardization, operability, and traceability of on-site transmission verification wiring.

[0017] A second aspect of the present invention provides a method for controlling a simulated circuit breaker based on power distribution network remote control technology. The method is applied to a simulated circuit breaker device based on power distribution network remote control technology and includes the following steps: One end of the external secondary cable is electrically connected to the secondary interface of the equipment body, and the other end of the external secondary cable is connected to the secondary side circuit of the power distribution automation system. The external secondary cable includes at least a remote closing input line, a remote opening input line, and an opening / closing status output line. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. The closing or opening status signal generated by the contact terminals of the closing relay and the opening relay when the corresponding relays are activated is output to the secondary circuit through the closing / opening status output line.

[0018] A third aspect of the present invention provides a method for controlling a simulated circuit breaker based on power distribution network remote control technology. The method is applied to a simulated circuit breaker device based on power distribution network remote control technology and includes the following steps: Connect one end of the external secondary cable to the secondary interface of the equipment body, and connect the other end of the external secondary cable to the remote control output terminal and the remote signaling input terminal of the power distribution automation terminal. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. The closing status signal or opening status signal generated by the contact terminals of the closing relay and the opening relay when the corresponding relays are activated is output to the remote signaling input terminal of the power distribution automation terminal through the closing / opening status output line.

[0019] A fourth aspect of the present invention provides a method for controlling a simulated circuit breaker based on power distribution network remote control technology. The method is applied to a simulated circuit breaker device based on power distribution network remote control technology and includes the following steps: Disconnect the control power supply to the distribution network automation terminal; Remove the remote control line and remote signaling line corresponding to the distribution network automation terminal from the secondary side circuit of the ring main unit; electrically connect one end of the external secondary cable to the secondary interface of the equipment body, and connect the other end of the external secondary cable to the secondary side circuit of the ring main unit. The external secondary cable includes at least a remote closing input line, a remote opening input line, and a closing / opening status output line. The remote closing input line is electrically connected to the remote closing circuit terminal in the secondary side circuit of the ring main unit, the remote opening input line is electrically connected to the remote opening circuit terminal in the secondary side circuit of the ring main unit, and the closing / opening status output line is electrically connected to the remote signaling circuit terminal in the secondary side circuit of the ring main unit. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the corresponding relay is activated, a closing status signal or a closing status signal is output to the secondary circuit of the ring main unit through the opening and closing status output line.

[0020] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and will also become apparent in part to those skilled in the art upon studying the text, or may be learned by practice of the invention. The objects and other advantages of the invention will become apparent from the description and the accompanying drawings.

[0021] Those skilled in the art will understand that the objectives and advantages achievable with the present invention are not limited to those specifically described above, and that the above and other objectives achievable with the present invention will become clearer from the following detailed description. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] In the attached diagram: Figure 1 This is a schematic diagram of a simulated circuit breaker device based on power distribution network remote control technology, provided as an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the control panel of a simulated circuit breaker device based on power distribution network remote control technology, provided as an embodiment of the present invention.

[0025] Figure 3 This invention provides an internal core electrical wiring diagram for a simulated circuit breaker device based on power distribution network remote control technology.

[0026] Figure 4 This is a flowchart illustrating a simulated circuit breaker control method based on power distribution network remote control technology, provided as an embodiment of the present invention. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0029] Figure 1 This is a schematic diagram of a simulated circuit breaker device based on power distribution network remote control technology provided in an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the control panel of a simulated circuit breaker device based on power distribution network remote control technology, provided in an embodiment of the present invention.

[0031] Figure 3 This is an internal core electrical wiring diagram of a simulated circuit breaker device based on power distribution network remote control technology, provided by an embodiment of the present invention.

[0032] Example 1, as Figure 1 , 2 As shown in Figure 3, the present invention provides a simulated circuit breaker device based on power distribution network remote control technology, comprising a device body and external secondary cables: The device body includes a housing, a battery 101 disposed within the housing, a relay execution unit 102, and a charging interface 105 electrically connected to the battery. The relay execution unit 101 includes a closing relay and a closing relay. The device body also includes a local / remote switch 104 disposed on the housing, as well as a closing button and a closing button 103. The equipment body includes a detachable outer casing with on / off indicator lights, a local / remote transfer switch (also known as a universal transfer switch), on / off buttons, and a charging port. The casing houses a lithium battery, secondary terminals, and a relay. External secondary cables can be connected to the power distribution automation system via the secondary side of the ring main unit using various methods, including ring main unit terminal blocks, secondary clamps, and aviation plugs, depending on their respective cable definitions.

[0033] The local opening / closing button and the remote control cable in the secondary cable are connected to the relay through the local and remote positions of the transfer switch, respectively. When the opening / closing button is activated, or when the secondary cable receives the remote control command from the power distribution automation terminal, the circuit is opened, supplying power from the battery to the relay to complete the opening and closing of the simulated circuit breaker. The opening / closing signal is sent to the automation secondary circuit, and the opening / closing status is indicated by the opening / closing indicator light connected to the relay.

[0034] The device of this invention can realize remote / local, opening / closing signals of a simulated primary switch; realize remote control command operation of a simulated master station, thereby verifying that the secondary circuit wiring, terminal point table configuration, master station table configuration, master station parameter settings, and communication all meet production conditions, realizing the most critical verification for the grid-connected operation of power distribution automation.

[0035] Figure 3 KM+ and KM- represent the positive and negative terminals of the battery, which is used to simulate the operating power supply of automated devices in real-world scenarios. Figure 3 DK in the diagram represents an air switch, corresponding to... Figure 2The power switch uses an air switch DK to simulate the operating power switch installed on the secondary side of the ring main unit in a real-world scenario.

[0036] One end of the external secondary cable is electrically connected to the secondary interface of the device body, and the other end is configured to access the secondary side circuit of the power distribution network automation system; the external secondary cable includes at least a remote closing input line, a remote opening input line, and an opening / closing status output line; When the local / remote selector switch is in the local position, the coil terminals of the closing relay and the opening relay are electrically connected to the closing button and the opening button, respectively. When the local / remote selector switch is in the remote position, the coil terminals of the closing relay and the opening relay are electrically connected to the remote closing input line and the remote opening input line, respectively. The contact terminals of the closing relay and the opening relay are electrically connected to the opening / closing status output line so as to output a closing status signal or an opening status signal representing the switch position to the secondary circuit when the corresponding relay is activated.

[0037] Figure 3 The manual closing and manual opening circuits in the diagram simulate the manual opening and closing circuits of a primary switch, respectively. SA represents the remote / local switch handle. Figure 2 The changeover switch in the circuit. SB1 is the closing button, simulating the closing button on the ring main unit, corresponding to... Figure 2 The closing button is SB2; SB2 is the opening button, simulating the opening button on the ring main unit, corresponding to... Figure 2 The circuit breaker has a trip button; rectangular HQ and rectangular TQ simulate the closing and tripping coils of the primary switch, respectively; switch-shaped HQ simulates the normally open closing relay on the secondary side of the ring main unit, and switch-shaped TQ simulates the normally closed tripping relay on the secondary side of the ring main unit. HFCOM is the remote control common terminal. The tripping and closing operations are explained according to the electrical schematic and device appearance diagram: When the changeover switch SA is set to local, SA in the circuit is closed, the switch is in the tripped state, so the TQ coil is de-energized, and the TQ normally closed relay is closed. When the closing button SB1 is pressed, the manual closing circuit is connected, the HQ coil is energized, the HQ normally open relay is closed, switch-shaped HQ is energized, the closing holding circuit is connected, and the switch is closed. The manual tripping is similar and will not be described in detail.

[0038] Figure 3 The remote closing and remote opening circuits in the diagram simulate the remote opening and closing circuits of a primary switch, respectively, where SA represents the remote / local handle, corresponding to... Figure 2 The changeover switch in the middle. Figure 3The remote closing and remote opening relays in the switch-type remote switch represent remote control relays within the distribution automation unit (DTU). When the changeover switch is switched to the remote position, the SA in the remote closing and remote opening circuits closes. At this time, the master station sends a remote control command, and the distribution automation unit processes the command and activates the remote closing and remote opening relays respectively, thereby connecting the closing and opening circuits and realizing the remote operation of the switch.

[0039] like Figure 3 As shown, a battery is installed inside the equipment as the control power source. The positive and negative terminals of the battery form control power buses (e.g., KM+ and KM-). The battery is electrically connected to the relay execution circuit via a power switch (two circuit breakers DK in the diagram) to provide power to the coil circuits of the closing and opening relays. The charging interface is electrically connected to the battery for charging.

[0040] The operating modes of the simulated circuit breaker device are divided into local operating mode and remote operating mode.

[0041] On-site work mode: When the local / remote selector switch (e.g., SA) is in the local position, the closing button and the opening button are respectively connected to the corresponding relay coil circuit: (1) When the closing button (e.g., SB1) is pressed, the closing button circuit is turned on, which energizes the closing relay coil (rectangular HQ); (2) When the trip button (e.g. SB2) is pressed, the trip button circuit is turned on, which energizes the trip relay coil (rectangular TQ).

[0042] When in the local position, the contacts of the closing relay (switch type HQ) or the contacts of the opening relay (switch type TQ) switch as the corresponding coil is energized, forming a status signal corresponding to the closing or opening state on the opening / closing state output circuit; when the equipment body is equipped with opening and closing indicator lights, the indicator lights display according to the changes of the corresponding status signals.

[0043] Remote work mode: When the local / remote selector switch is in the remote position, the remote closing input line and the remote opening input line in the external secondary cable are respectively connected to the corresponding relay coil circuit: (1) When the remote closing input line receives the remote closing command output by the distribution automation terminal and forms a remote closing circuit, the closing relay coil (rectangular HQ) is energized and closed; (2) When the remote disconnection input line receives the remote disconnection command output by the power distribution automation terminal and forms a remote disconnection circuit, the trip relay coil (rectangular TQ) is energized and engaged.

[0044] Under the aforementioned remote setting, the contacts of the closing relay (switch type HQ) or the contacts of the opening relay (switch type TQ) switch as the corresponding coil is energized, and output the closing status signal or the opening status signal to the secondary circuit through the opening / closing status output line of the external secondary cable.

[0045] When using the secondary side terminal access method of the ring main unit, first disconnect the control power supply of the distribution automation terminal; disconnect the remote control line and remote signaling line corresponding to the distribution automation terminal in the secondary side circuit of the ring main unit; then complete the electrical connection of the external secondary cable according to the terminal function: connect the remote closing input line to the remote closing circuit terminal in the secondary side circuit of the ring main unit, connect the remote opening input line to the remote opening circuit terminal in the secondary side circuit of the ring main unit, and connect the opening and closing status output line to the remote signaling circuit terminal in the secondary side circuit of the ring main unit.

[0046] After the above access is completed, when the local / remote selector switch is in the local or remote position, the relay coil circuit is turned on and the contact status is output according to the aforementioned local working mode circuit or remote working mode circuit, respectively.

[0047] By adopting the above scheme, the present invention provides a simulated circuit breaker device based on distribution network remote control technology. This device incorporates a battery, a closing relay, and a opening relay within its main body, and connects to the secondary circuit of the distribution network automation system via external secondary cables. This enables the simulated circuit breaker device to provide executable closing and opening actions without relying on the actual opening and closing of the primary equipment on-site. By setting a local / remote switching switch, and connecting the closing and opening buttons to the corresponding relay coils in the local position, isolation and switching between the local operation path and the remote control path are achieved. Furthermore, in the remote position, the remote closing input line and remote opening input line are connected to the corresponding relay coils, realizing the input link for remote control commands to trigger relay actions. By electrically connecting the relay contact terminals to the closing / opening status output lines, a closing status signal or an opening status signal is output to the secondary circuit when the corresponding relay operates. This significantly improves the feasibility and integrity of remote control transmission verification for distribution automation under uninterrupted power supply conditions.

[0048] In some embodiments of the present invention, the other end of the external secondary cable is provided with a connector, which is one or more of the following: a ring main unit terminal block connector, a secondary wire clamp connector, or an aviation plug connector.

[0049] In some embodiments of the present invention, the device body is provided with a secondary terminal, one end of the external secondary cable is electrically connected to the secondary terminal, and the secondary terminal constitutes at least a part of the secondary interface.

[0050] In some embodiments of the present invention, the device body further includes a power switch, which is connected in series between the power supply circuit of the battery and the relay execution unit.

[0051] In some embodiments of the present invention, the device body further includes a closing indicator light and a closing indicator light. The closing indicator light is electrically connected to the closing status signal corresponding to the action of the closing relay, and the closing indicator light is electrically connected to the opening status signal corresponding to the action of the opening relay.

[0052] In some embodiments of the present invention, the external secondary cable further includes a remote control common terminal line, which together with the remote connection input line and the remote disconnect input line constitutes a remote control input circuit under the remote position.

[0053] In some embodiments of the present invention, the external secondary cable further includes a remote signaling common terminal line and a handle position line, wherein the handle position line is used to output the position status of the local / remote selector switch to the secondary side circuit.

[0054] In some embodiments of the present invention, the method further includes connecting the external secondary cable to the remote control output terminal and the remote signaling input terminal of the power distribution automation terminal, so that the method performs remote control input and opening / closing status output within the scope of the power distribution automation system and the power distribution automation terminal.

[0055] Compared with existing technologies, the advantages of this invention are as follows: by setting terminal block connections, secondary clamp connections, or aviation plug connections at the ends of external secondary cables, the device can quickly access and adapt to the secondary interface forms of ring main units in different stations; by setting secondary terminals in the device body as components of secondary interfaces, standardized termination and maintainable wiring of external cables and internal circuits of the device can be achieved; by setting power switch components in series in the power supply circuits of the battery and relay execution unit, on / off control and maintenance isolation of the device's power supply circuit can be achieved; furthermore, by setting closing indicator lights and opening indicator lights and electrically connecting them with corresponding status signals, visual status verification of the local / remote transmission process can be achieved; by adding a remote control common terminal line in the external secondary cables, the remote closing input line, remote opening input line, and common terminal can form a unified remote control input circuit to adapt to different terminal remote control wiring habits; furthermore, by adding a remote signaling common terminal line and a handle position line and outputting the switch position status, the mode status can be synchronously sent up in the secondary side circuit, significantly improving the standardization, operability, and traceability of on-site transmission verification wiring.

[0056] Figure 4 This is a flowchart illustrating a simulated circuit breaker control method based on power distribution network remote control technology, provided in an embodiment of the present invention.

[0057] Example 2, as Figure 3 As shown in Figure 4, the present invention also provides a simulated circuit breaker control method based on distribution network remote control technology. The method is applied to a simulated circuit breaker device based on distribution network remote control technology and includes the following steps: One end of the external secondary cable is electrically connected to the secondary interface of the equipment body, and the other end of the external secondary cable is connected to the secondary side circuit of the power distribution automation system. The external secondary cable includes at least a remote closing input line, a remote opening input line, and an opening / closing status output line. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. The closing or opening status signal generated by the contact terminals of the closing relay and the opening relay when the corresponding relays are activated is output to the secondary circuit through the closing / opening status output line.

[0058] In one embodiment of the present invention, if it is necessary to connect the device of the present invention to the secondary side circuit of the ring main unit, disconnect the control power supply of the power distribution automation terminal; remove the remote control line and remote signaling line corresponding to the power distribution automation terminal in the secondary side circuit of the ring main unit; electrically connect the remote closing input line of the external secondary cable to the remote closing circuit terminal in the secondary side circuit of the ring main unit, electrically connect the remote opening input line of the external secondary cable to the remote opening circuit terminal in the secondary side circuit of the ring main unit, and electrically connect the opening and closing status output line of the external secondary cable to the remote signaling circuit terminal in the secondary side circuit of the ring main unit.

[0059] In this embodiment, the analog circuit breaker control method based on distribution network remote control technology is divided into the following two access control modes: Method 1: When remote transmission of live equipment is required, disconnect the control power supply of the distribution automation terminal. Disconnect the secondary remote signaling common terminal, remote / local switch handle, power switch, remote control common terminal, opening line, and closing line of the ring main unit, and take safety precautions. Connect the remote signaling common terminal, power switch, remote / local switch handle, opening line, closing line, and remote control common terminal of the simulated circuit breaker's secondary cable side to the corresponding terminals on the secondary side of the ring main unit. Connect the opening line, closing line, and remote control common terminal to the remote control line. Open the simulated circuit breaker switch to start the automated transmission process. This method can verify the correctness of the three parts: the distribution automation master station, the distribution automation terminal, and the secondary wiring between the distribution automation terminal and the ring main unit.

[0060] Method 2: When remote control of live equipment is required, disconnect the power supply to the distribution automation terminal. Disconnect the ring main unit's secondary remote signaling common terminal, remote / local switch handle, power switch, remote control common terminal, opening line, and closing line, and ensure safety measures are in place. Directly connect the remote signaling common terminal, power switch, remote / local switch handle, opening line, closing line, and remote control common terminal of the simulated circuit breaker's secondary cable side to the distribution automation terminal. Open the simulated circuit breaker switch to begin the automated transmission process. This method verifies the correctness of both the distribution automation master station and the distribution automation terminal. Transmit the remote / local and switch positions by switching the remote / local handle and using the manual opening / closing buttons. The indicator lights on the simulated circuit breaker simulate the switch position: a red light indicates the switch is closed, and a green light indicates the switch is open. Before remote control transmission, switch the remote local handle to the remote position. At this time, the power distribution automation master station can perform remote opening and closing operations according to the simulated circuit breaker switch position. The opening and closing indicator lights are used to check whether the remote control command has been executed correctly and whether the remote master station and the actual site are completely consistent.

[0061] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A simulated circuit breaker device based on power distribution network remote control technology, characterized in that, Including the device itself and external secondary cables; The device body includes a housing, a battery disposed within the housing, a relay execution unit, and a charging interface electrically connected to the battery. The relay execution unit includes a closing relay and a opening relay. The device body also includes a local / remote selector switch, a closing button, and a closing button, all mounted on the housing. One end of the external secondary cable is electrically connected to the secondary interface of the device body, and the other end is configured to access the secondary side circuit of the power distribution network automation system; the external secondary cable includes at least a remote closing input line, a remote opening input line, and an opening / closing status output line; When the local / remote selector switch is in the local position, the coil terminals of the closing relay and the opening relay are electrically connected to the closing button and the opening button, respectively. When the local / remote selector switch is in the remote position, the coil terminals of the closing relay and the opening relay are electrically connected to the remote closing input line and the remote opening input line, respectively. The contact terminals of the closing relay and the opening relay are electrically connected to the opening / closing status output line so as to output a closing status signal or an opening status signal representing the switch position to the secondary circuit when the corresponding relay is activated.

2. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The other end of the external secondary cable is provided with a connector, which is one or more of the following: ring main unit terminal block connector, secondary wire clamp connector, or aviation plug connector.

3. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The device body is provided with a secondary terminal, one end of the external secondary cable is electrically connected to the secondary terminal, and the secondary terminal constitutes at least a part of the secondary interface.

4. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The device body also includes a power switch, which is connected in series between the power supply circuit of the battery and the relay execution unit.

5. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The device body also includes a closing indicator light and a closing indicator light. The closing indicator light is electrically connected to the closing status signal corresponding to the action of the closing relay, and the closing indicator light is electrically connected to the opening status signal corresponding to the action of the opening relay.

6. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The external secondary cable also includes a remote control common terminal line, which together with the remote connection input line and the remote disconnect input line constitutes a remote control input circuit under the remote position.

7. The simulated circuit breaker device based on power distribution network remote control technology according to claim 1, characterized in that, The external secondary cable also includes a remote signaling common terminal line and a handle position line. The handle position line is used to output the position status of the local / remote selector switch to the secondary side circuit.

8. A simulated circuit breaker control method based on distribution network remote control technology, characterized in that, The method, applied to the analog circuit breaker device based on power distribution network remote control technology as described in any one of claims 1-7, includes the following steps: Connect one end of the external secondary cable to the secondary interface of the equipment body, and connect the other end of the external secondary cable to the secondary side circuit of the power distribution automation system. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. The closing or opening status signal generated by the contact terminals of the closing relay and the opening relay when the corresponding relays are activated is output to the secondary circuit through the closing / opening status output line.

9. A simulated circuit breaker control method based on distribution network remote control technology, characterized in that, The method, applied to the analog circuit breaker device based on power distribution network remote control technology as described in any one of claims 1-7, includes the following steps: Connect one end of the external secondary cable to the secondary interface of the equipment body, and connect the other end of the external secondary cable to the remote control output terminal and the remote signaling input terminal of the power distribution automation terminal. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. The closing or opening status signal generated by the contact terminals of the closing relay and the opening relay when the corresponding relays are activated is output to the remote signaling input terminal of the power distribution automation terminal through the closing / opening status output line.

10. A simulated circuit breaker control method based on power distribution network remote control technology, characterized in that, The method, applied to the analog circuit breaker device based on power distribution network remote control technology as described in any one of claims 1-7, includes the following steps: Disconnect the control power supply to the distribution network automation terminal; Remove the remote control line and remote signaling line corresponding to the distribution network automation terminal from the secondary side circuit of the ring main unit; electrically connect one end of the external secondary cable to the secondary interface of the equipment body, and connect the other end of the external secondary cable to the secondary side circuit of the ring main unit. The external secondary cable includes at least a remote closing input line, a remote opening input line, and a closing / opening status output line. The remote closing input line is electrically connected to the remote closing circuit terminal in the secondary side circuit of the ring main unit, the remote opening input line is electrically connected to the remote opening circuit terminal in the secondary side circuit of the ring main unit, and the closing / opening status output line is electrically connected to the remote signaling circuit terminal in the secondary side circuit of the ring main unit. Switch the local / remote selector switch to local or remote mode; When the local / remote selector switch is in the local position, the trigger signals of the closing button and the opening button are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the local / remote selector switch is in the remote position, the remote closing command received through the remote closing input line and the remote opening command received through the remote opening input line are respectively input to the coil terminals of the closing relay and the opening relay to drive the corresponding relays to operate. When the corresponding relay is activated, a closing status signal or a closing status signal is output to the secondary circuit of the ring main unit through the opening and closing status output line.

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