Bus tie switch control unit circuit and working method thereof

Abstract

The invention discloses a bus tie switch control unit circuit and a working method thereof. The control unit circuit comprises an energy storage power supply switch, an energy storage power supply circuit, a loop closing pressure plate, a selective tripping pressure plate, a closing pressure plate and an automatic opening control circuit, wherein the energy storage power supply switch is used for connecting an AC power supply live wire end of a spare power automatic switching device and an energy storage power supply live wire end of a bus tie switch; the energy storage power supply circuit is used for connecting an alternating current power supply zero line end of the spare power automatic switching device and an energy storage power supply zero line of the bus tie switch; the loop closing pressing plate is used for connecting the loop closing pressing plate control end of the spare power automatic switching device and the remote signaling common end of the bus tie switch; the selective tripping pressing plate is used for connecting the remote signaling common end of the bus tie switch and the selective tripping pressing plate control end of the spare power automatic switching device; the closing pressure plate is used for connecting an automatic closing terminal of the spare power automatic switching device and a closing coil control end of the bus tie switch; and the automatic opening control circuit is used for connecting an automatic opening terminal of the spare power automatic switching device and an opening coil control end of the bus tie switch. The working method is based on the control unit circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution control, and in particular to a bus tie switch control unit circuit and a working method thereof. Background Art

[0002] In the non-stop transformation of the power distribution system, the busbar tie switch, as the core control equipment of the low-voltage busbar tie cabinet, needs to work in conjunction with the dual power supply automatic switching measurement and control device to realize the dual power automatic switching and busbar segmentation / parallel operation functions.

[0003] However, in the existing technology, in order to realize the busbar switch opening and closing logic, status monitoring and linkage with the standby automatic switching device, it is necessary to install a variety of pressure plates, switches and indicator lights in the busbar cabinet. These components are connected to the different functional terminals of the busbar switch control circuit and the standby automatic switching device respectively through hard wiring, resulting in a wide variety of wiring types and crowded terminal blocks, which not only increases the complexity of on-site construction, but also prolongs the debugging and acceptance cycle. What is more serious is that the complicated wiring is prone to problems such as wiring errors and poor contact, causing the device to malfunction or refuse to operate, threatening the reliability of power supply. In addition, in subsequent operation and maintenance, troubleshooting requires checking each pressure plate, switch and indicator light circuit one by one, which is time-consuming and labor-intensive and poses a safety hazard. Summary of the Invention

[0004] The object of the present invention is to provide a busbar switch control unit circuit and its working method to solve at least one of the problems mentioned in the above background technology, such as the wide variety of wiring leading to complex on-site construction, extended debugging and acceptance cycle, and difficult troubleshooting.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A bus tie switch control unit circuit, comprising: An energy storage power switch, one end of which is used to electrically connect to the live wire end of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the live wire end of the energy storage power supply of the bus tie switch; An energy storage power supply circuit, one end of which is used to electrically connect to the neutral line terminal of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the neutral line of the energy storage power supply of the bus tie switch; A closing pressure plate, one end of which is used to electrically connect to the closing pressure plate control end of the standby automatic switching device, and the other end of which is used to electrically connect to the remote signal common end of the bus tie switch; A selective jump pressure plate, the selective jump pressure plate is connected in parallel with the closing pressure plate, one end of the selective jump pressure plate is used to electrically connect to the remote signal common terminal of the bus tie switch, and the other end of the selective jump pressure plate is used to electrically connect to the selective jump pressure plate control terminal of the standby automatic switching device; A closing pressure plate, one end of which is used to electrically connect to the automatic closing terminal of the backup automatic switching device, and the other end of which is used to electrically connect to the closing coil control terminal of the bus tie switch; An automatic tripping control circuit, one end of which is used to electrically connect to the automatic tripping terminal of the standby automatic switching device, and the other end of which is used to electrically connect to the tripping coil control end of the bus tie switch.

[0006] Optionally, a closing button is further included, which is connected in series with the closing pressure plate, and the other end of the closing button is used to electrically connect to the manual closing terminal of the standby automatic switching device.

[0007] Optionally, a trip button is also included, which is connected in parallel with the automatic trip control circuit. One end of the trip button is used to electrically connect to the trip coil control end of the main switch, and the other end of the trip button is used to electrically connect to the manual trip terminal of the standby automatic switching device.

[0008] Optionally, it also includes a closed position indicator light, one end of which is used to electrically connect to the remote signal 24V positive power supply terminal of the standby automatic transfer device, and the other end of the closed position indicator light is used to electrically connect to the switch closed contact of the main switch.

[0009] Optionally, it also includes a position indicator light, which is connected in parallel with the closed position indicator light. One end of the position indicator light is used to electrically connect to the remote signal 24V positive power supply end of the standby automatic switching device, and the other end of the position indicator light is used to electrically connect to the switch position contact of the main switch.

[0010] Optionally, it also includes a switch position signal line, which is connected in parallel with the position indicator light. One end of the switch position signal line is used to electrically connect the switch position contact of the main switch, and the other end of the switch position signal line is used to electrically connect the switch position signal end of the standby automatic transfer device.

[0011] Optionally, it also includes an energy storage indicator light, which is connected in parallel with the energy storage power supply circuit. One end of the energy storage indicator light is used to electrically connect to the AC power neutral line end of the standby automatic transfer device, and the other end of the energy storage indicator light is used to electrically connect to the energy storage indicator light signal end of the main switch.

[0012] Optionally, it also includes a telesignaling signal transmission circuit, which is connected in parallel with the closing pressure plate and the selection pressure plate, one end of the telesignaling signal transmission circuit is used to electrically connect the telesignaling common end of the main switch, and the other end of the telesignaling signal transmission circuit is used to electrically connect the telesignaling common end of the standby automatic transfer device.

[0013] Optionally, it also includes a switch fault signal transmission line, one end of which is used to electrically connect to the fault position signal end of the standby automatic transfer device, and the other end of the switch fault signal transmission line is used to electrically connect to the switch fault position signal end of the main switch.

[0014] A method for operating a bus tie switch control unit circuit, based on the bus tie switch control unit circuit provided in any one of the above embodiments, comprises: The energy storage power supply switch is closed and the closing pressure plate is engaged, thereby forming a live line path, a neutral line path, an automatic closing control path, and an automatic opening control path through the energy storage power supply circuit and the automatic opening control circuit; When the line is normal, the closing pressure plate and the tripping pressure plate are not put into operation, the bus tie breaker is opened, and the busbar is operated in separate columns; When a line fails or is under maintenance, the closing pressure plate and the selective tripping pressure plate are put into operation to form a closing control path and a selective tripping control path, and the standby automatic switching device controls the bus tie breaker to close and trips the faulty or under maintenance line; When the line is cleared of faults or maintenance is completed, the closing pressure plate and the selective tripping pressure plate are kept in operation, the closing control path and the selective tripping control path are maintained, and the standby automatic switching device controls the bus tie breaker to open, and the busbar separate operation is restored.

[0015] The beneficial effects of the present invention are: The busbar switch control unit circuit of the present invention solves technical problems in the prior art such as the complexity of on-site construction, extended debugging and acceptance cycles, and difficulty in troubleshooting caused by the wide variety of wiring types, and achieves beneficial effects: by standardizing the connection of key functional modules such as energy storage power supplies, ring closing pressure plates, and jump selection pressure plates, the complex wiring paths of dispersed components in traditional solutions are reduced. At the same time, the modular design supports interface standardization, which enables quick plug-in and replacement. There is no need to shut down the power and disconnect the wires during maintenance, which shortens the time for single maintenance, simplifies the on-site construction process, and reduces the complexity of troubleshooting.

[0016] Furthermore, by introducing a series manual closing button, the system's emergency response capability and operational safety are enhanced while retaining the automatic control function. It also has strong compatibility, convenient maintenance, and shortens maintenance time.

[0017] Furthermore, through the parallel manual trip button design, while retaining the automatic trip function, the operational reliability and response speed under emergency conditions are greatly improved, and the environmental adaptability and maintenance convenience are improved.

[0018] Furthermore, through the integration of the closed position indicator light, real-time visual monitoring of the busbar switch status is achieved, significantly improving operation and maintenance efficiency and safety.

[0019] Furthermore, through the parallel design of position indicator lights, real-time and redundant indication of the main circuit breaker's tripping status is achieved, significantly improving operation and maintenance efficiency and system reliability, while simplifying wiring and enhancing anti-interference capabilities.

[0020] Furthermore, through the parallel design of the switch position signal line and the position indicator light, dual monitoring and high-precision control of the position status are achieved, significantly improving system reliability, diagnostic efficiency and compatibility.

[0021] Furthermore, through the parallel design of the energy storage indicator light and the power supply line, real-time monitoring of the energy storage status and fault warning are achieved, which significantly improves operation and maintenance efficiency and system safety and facilitates maintenance.

[0022] Furthermore, through the redundant parallel design of the remote signal transmission line, high-reliability, low-latency signal interaction is achieved between the main switch and the backup automatic transfer device, significantly improving the system synchronization, anti-interference ability and operation and maintenance efficiency.

[0023] The working method of the bus tie switch control unit circuit of the present invention solves technical problems in the prior art such as the complexity of on-site construction, extended debugging and acceptance cycles, and difficulty in troubleshooting caused by the wide variety of wiring types, and achieves beneficial effects: by standardizing the connection of key functional modules such as energy storage power supplies, loop closing pressure plates, and selective jump pressure plates, traditional scattered wiring is integrated into standardized loops, and through standardized pressure plate activation and deactivation logic and multi-stage control strategies, manual intervention links are reduced, and automatic switching of bus tie switch modes is achieved, which significantly improves the reliability and response speed of bus tie switch operations, simplifies the construction process, and shortens construction and maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 4 is a topological diagram of a bus tie switch control unit circuit provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention.

[0028] Below, refer to Figure 1 A bus tie switch control unit circuit and its working method involved in an embodiment of the present invention are described in detail.

[0029] The first embodiment of the present invention provides a busbar switch control unit circuit for communication between the busbar switch and the standby automatic switching device. As described in the background art, a variety of pressure plates, switches and indicator lights are installed in the busbar cabinet. These components are connected to the different functional terminals of the busbar switch control circuit and the standby automatic switching device respectively through hard wiring, resulting in a wide variety of wiring types and crowded terminal blocks, which not only increases the complexity of on-site construction, but also prolongs the debugging and acceptance cycle. In subsequent operation and maintenance, troubleshooting requires checking each pressure plate, switch and indicator light circuit one by one, which is time-consuming and labor-intensive and poses a safety hazard. The following is a detailed explanation with reference to the accompanying drawings.

[0030] like Figure 1 As shown, a bus tie switch control unit circuit includes: An energy storage power switch, one end of which is used to electrically connect to the live wire end of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the live wire end of the energy storage power supply of the bus tie switch; An energy storage power supply circuit, one end of which is used to electrically connect to the neutral line terminal of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the neutral line of the energy storage power supply of the bus tie switch; A closing pressure plate, one end of which is used to electrically connect to the closing pressure plate control end of the standby automatic switching device, and the other end of which is used to electrically connect to the remote signal common end of the bus tie switch; A selective jump pressure plate, the selective jump pressure plate is connected in parallel with the closing pressure plate, one end of the selective jump pressure plate is used to electrically connect to the remote signal common terminal of the bus tie switch, and the other end of the selective jump pressure plate is used to electrically connect to the selective jump pressure plate control terminal of the standby automatic switching device; A closing pressure plate, one end of which is used to electrically connect to the automatic closing terminal of the backup automatic switching device, and the other end of which is used to electrically connect to the closing coil control terminal of the bus tie switch; An automatic tripping control circuit, one end of which is used to electrically connect to the automatic tripping terminal of the standby automatic switching device, and the other end of which is used to electrically connect to the tripping coil control end of the bus tie switch.

[0031] It should be noted that both ends of the energy storage power switch, the energy storage power line, the closing pressure plate, the closing pressure plate and the automatic tripping control line are provided with lines and interfaces for connecting the standby automatic transfer device and the bus tie switch respectively; the parameters and specifications of the energy storage power switch, the energy storage power line, the closing pressure plate, the selective tripping pressure plate, the closing pressure plate and the automatic tripping control line are set according to actual safety specifications. In this embodiment, preferably, the energy storage power switch, the closing pressure plate, the selective tripping pressure plate and the closing pressure plate are made of insulating material; in order to avoid ground loop interference, the neutral line end of the energy storage power line is independently isolated from the grounding terminal of the bus tie cabinet; in order to improve power safety, the control unit can be configured with a fuse (such as a 5A fast-blow type) to protect the energy storage power circuit from short-circuit impact.

[0032] Therefore, by standardizing the connection of key functional modules such as energy storage power supply, closing pressure plate, and jump pressure plate, the complex wiring paths of scattered components in traditional solutions are reduced. At the same time, the modular design supports interface standardization, which enables quick plug-in and replacement. There is no need to cut off the power and disconnect the wires during maintenance, which shortens the time for single maintenance, simplifies the on-site construction process, and reduces the complexity of troubleshooting.

[0033] In this embodiment, preferably, a closing button is further included, the closing button is connected in series with the closing pressure plate, and the other end of the closing button is used to electrically connect to the manual closing terminal of the standby automatic switching device.

[0034] In this embodiment, preferably, a trip button is also included, which is connected in parallel with the automatic trip control circuit, one end of the trip button is used to electrically connect to the trip coil control end of the main switch, and the other end of the trip button is used to electrically connect to the manual trip terminal of the standby automatic switching device.

[0035] In this embodiment, preferably, a closing indicator light is also included, one end of which is used to electrically connect to the remote signal 24V positive power supply end of the standby automatic switching device, and the other end of the closing indicator light is used to electrically connect to the switch closing contact of the main switch.

[0036] In this embodiment, preferably, it also includes a position indicator light, which is connected in parallel with the closed position indicator light, one end of the position indicator light is used to electrically connect to the remote signal 24V positive power supply end of the standby automatic switching device, and the other end of the position indicator light is used to electrically connect to the switch position contact of the main switch.

[0037] In this embodiment, preferably, a switch position signal line is also included, and the switch position signal line is connected in parallel with the position indicator light. One end of the switch position signal line is used to electrically connect the switch position contact of the main switch, and the other end of the switch position signal line is used to electrically connect the switch position signal end of the standby automatic transfer device.

[0038] In this embodiment, preferably, it also includes an energy storage indicator light, which is connected in parallel with the energy storage power supply circuit. One end of the energy storage indicator light is used to electrically connect to the AC power neutral line terminal of the standby automatic transfer device, and the other end of the energy storage indicator light is used to electrically connect to the energy storage indicator light signal terminal of the main switch.

[0039] In this embodiment, preferably, a telesignaling signal transmission line is further included, wherein the telesignaling signal transmission line is connected in parallel with the closing pressure plate and the selection pressure plate, one end of the telesignaling signal transmission line is used to electrically connect the telesignaling common end of the main coupling switch, and the other end of the telesignaling signal transmission line is used to electrically connect the telesignaling common end of the standby automatic switching device.

[0040] In this embodiment, preferably, it also includes a switch fault signal transmission line, one end of the switch fault signal transmission line is used to electrically connect to the fault position signal end of the standby automatic transfer device, and the other end of the switch fault signal transmission line is used to electrically connect to the switch fault position signal end of the main switch.

[0041] Therefore, the busbar switch control unit circuit of the present invention solves technical problems in the prior art such as the complexity of on-site construction, the extension of debugging and acceptance cycles, and the difficulty of troubleshooting due to the wide variety of wiring types, and achieves beneficial effects: by standardizing the connection of key functional modules such as energy storage power supplies, ring closing pressure plates, and jump selection pressure plates, the complex wiring paths of dispersed components in traditional solutions are reduced. At the same time, the modular design supports interface standardization, which enables quick plug-in and replacement. There is no need to cut off the power and disconnect the wires during maintenance, which shortens the time for single maintenance, simplifies the on-site construction process, and reduces the complexity of troubleshooting.

[0042] Furthermore, by introducing a series manual closing button, the system's emergency response capability and operational safety are enhanced while retaining the automatic control function. It also has strong compatibility, convenient maintenance, and shortens maintenance time.

[0043] Furthermore, through the parallel manual trip button design, while retaining the automatic trip function, the operational reliability and response speed under emergency conditions are greatly improved, and the environmental adaptability and maintenance convenience are improved.

[0044] Furthermore, through the integration of the closed position indicator light, real-time visual monitoring of the busbar switch status is achieved, significantly improving operation and maintenance efficiency and safety.

[0045] Furthermore, through the parallel design of position indicator lights, real-time and redundant indication of the main circuit breaker's tripping status is achieved, significantly improving operation and maintenance efficiency and system reliability, while simplifying wiring and enhancing anti-interference capabilities.

[0046] Furthermore, through the parallel design of the switch position signal line and the position indicator light, dual monitoring and high-precision control of the position status are achieved, significantly improving system reliability, diagnostic efficiency and compatibility.

[0047] Furthermore, through the parallel design of the energy storage indicator light and the power supply line, real-time monitoring of the energy storage status and fault warning are achieved, which significantly improves operation and maintenance efficiency and system safety and facilitates maintenance.

[0048] Furthermore, through the redundant parallel design of the remote signal transmission line, high-reliability, low-latency signal interaction is achieved between the main switch and the backup automatic transfer device, significantly improving the system synchronization, anti-interference ability and operation and maintenance efficiency.

[0049] In one embodiment, a closing button is further included, and the closing button is connected in series with the closing pressure plate, and the other end of the closing button is used to electrically connect the manual closing terminal of the standby automatic switching device. It should be noted that when the electrical connection between the closing pressure plate and the automatic closing terminal of the standby automatic switching device is disconnected, the closing button is pressed, and the closing pressure plate and the manual closing terminal of the standby automatic switching device are electrically connected through the closing button; for the sake of operational safety, the closing button can be configured with a mechanical or electrical interlocking device to ensure that when the closing pressure plate is not engaged, the closing button is physically locked to prevent unauthorized operation, and at the same time, the button is automatically reset after operation to avoid overheating of the coil caused by maintaining the closed state for a long time. Therefore, by introducing a series manual closing button, while retaining the automatic control function, the emergency response capability and operational safety of the system are enhanced, and the system has strong compatibility, convenient maintenance, and shortened maintenance time. It is suitable for low-voltage distribution scenarios with strict requirements on power supply continuity.

[0050] In one embodiment, a trip button is further included, and the trip button is connected in parallel with the automatic trip control circuit. One end of the trip button is used to electrically connect to the trip coil control end of the main switch, and the other end of the trip button is used to electrically connect to the manual trip terminal of the standby automatic switching device. It should be noted that when a fault occurs in the trip automatic control circuit and the standby automatic switching device is disconnected from the main switch, the trip button is pressed, and the standby automatic switching device and the main switch are electrically connected through the trip button; a status feedback contact can be configured to upload the button operation status to the standby automatic switching device in real time to avoid signal conflicts. Therefore, through the parallel manual trip button design, while retaining the automatic trip function, the operational reliability and response speed under emergency conditions are greatly improved, the environmental adaptability and maintenance convenience are improved, and it is suitable for low-voltage distribution systems with extremely high power supply safety requirements.

[0051] In one embodiment, a closed position indicator light is also included. One end of the closed position indicator light is electrically connected to the 24V positive power supply terminal of the backup automatic switching device, and the other end of the closed position indicator light is electrically connected to the closed position contact of the busbar breaker. It should be noted that the indicator light must be installed in a visible area of the cabinet door; a resettable fuse (such as a 500mA) can be connected in series with the indicator light to prevent damage to the remote signal power supply of the backup automatic switching device due to a short circuit. Thus, the integration of the closed position indicator light enables real-time visual monitoring of the busbar breaker status, significantly improving operation and maintenance efficiency and safety, and is suitable for low-voltage power distribution scenarios with strict status monitoring requirements.

[0052] In one embodiment, the system also includes a position indicator light connected in parallel with the closed position indicator light. One end of the position indicator light is electrically connected to the 24V positive power supply terminal of the remote signal of the backup automatic switching device, and the other end of the position indicator light is electrically connected to the switch position contact of the bus tie breaker. Thus, the parallel design of the position indicator lights provides real-time, redundant indication of the bus tie breaker's open state, significantly improving operation and maintenance efficiency and system reliability. It also simplifies wiring and enhances anti-interference capabilities, making it suitable for low-voltage power distribution scenarios with strict status visibility requirements.

[0053] In one embodiment, a switch position signal line is further included. The switch position signal line is connected in parallel with the position indicator light. One end of the switch position signal line is used to electrically connect to the switch position contact of the busbar switch, and the other end of the switch position signal line is used to electrically connect to the switch position signal terminal of the backup automatic transfer device. It should be noted that through the opening position signal line, the busbar switch sends a switch position signal to the switch position signal terminal of the backup automatic transfer device. The switch position signal line can be a shielded twisted pair (such as RVSP 2×0.5mm²), with the shielding layer grounded at one end to suppress signal jumps caused by electromagnetic interference (EMI). Therefore, the parallel design of the switch position signal line and the position indicator light achieves dual monitoring and high-precision control of the position status, significantly improving system reliability, diagnostic efficiency, and compatibility. It is suitable for smart power distribution scenarios that require high real-time performance and redundancy.

[0054] In one embodiment, an energy storage indicator light is further included. The energy storage indicator light is connected in parallel with the energy storage power supply circuit. One end of the energy storage indicator light is electrically connected to the neutral terminal of the AC power supply of the backup automatic transfer device, and the other end of the energy storage indicator light is electrically connected to the energy storage indicator light signal terminal of the busbar switch. It should be noted that the energy storage indicator light should be installed near the energy storage motor to facilitate status observation; the connecting wire can be made of high-temperature resistant silicone wire (e.g., -40°C to +180°C) to prevent insulation aging caused by motor heating. Thus, the parallel design of the energy storage indicator light and the power supply circuit achieves real-time monitoring of the energy storage status and fault warning, significantly improving operation and maintenance efficiency and system safety, facilitating maintenance, and is suitable for low-voltage power distribution scenarios with stringent requirements for energy storage reliability.

[0055] In one embodiment, a telesignaling signal transmission line is further included, wherein the telesignaling signal transmission line is connected in parallel with the closing pressure plate and the selective jump pressure plate, and one end of the telesignaling signal transmission line is used to electrically connect to the telesignaling common end of the busbar switch, and the other end of the telesignaling signal transmission line is used to electrically connect to the telesignaling common end of the standby automatic transfer device. It should be noted that the parallel path priority can be verified during the debugging phase, and the standby automatic transfer device can respond to the telesignaling line signal first, with the pressure plate signal as an auxiliary; thus, through the redundant parallel design of the telesignaling signal transmission line, a highly reliable and low-latency signal interaction between the busbar switch and the standby automatic transfer device is achieved, which significantly improves the system synchronization, anti-interference ability and operation and maintenance efficiency, and is suitable for intelligent distribution systems with strict requirements on signal integrity.

[0056] In one embodiment, a switch fault signal transmission line is further included, one end of which is used to electrically connect to the fault position signal end of the backup automatic switching device, and the other end of the switch fault signal transmission line is used to electrically connect to the switch fault position signal end of the busbar switch. It should be noted that the fault signal line needs to be laid in layers with the power cable; during debugging, typical faults (such as overcurrent and mechanical jamming) need to be simulated to verify the signal transmission integrity and the backup automatic switching response logic. Therefore, through the design of a dedicated fault signal transmission line, the precise positioning and rapid isolation of the busbar switch fault are achieved, significantly improving the system safety, operation and maintenance efficiency, and intelligence level, and is suitable for critical power distribution scenarios with extremely high requirements for fault response.

[0057] The second embodiment of the present invention provides a working method of a bus tie switch control unit circuit, which is described in detail below.

[0058] A method for operating a bus tie switch control unit circuit, based on the bus tie switch control unit circuit provided in any one of the above embodiments, comprises: The energy storage power supply switch is closed and the closing pressure plate is engaged, thereby forming a live line path, a neutral line path, an automatic closing control path, and an automatic opening control path through the energy storage power supply circuit and the automatic opening control circuit; When the line is normal, the closing pressure plate and the tripping pressure plate are not put into operation, the bus tie breaker is opened, and the busbar is operated in separate columns; When a line fails or is under maintenance, the closing pressure plate and the selective tripping pressure plate are put into operation to form a closing control path and a selective tripping control path, and the standby automatic switching device controls the bus tie breaker to close and trips the faulty or under maintenance line; When the line is cleared of faults or maintenance is completed, the closing pressure plate and the selective tripping pressure plate are kept in operation, the closing control path and the selective tripping control path are maintained, and the standby automatic switching device controls the bus tie breaker to open, and the busbar separate operation is restored.

[0059] It should be noted that operations must be performed in the correct order to avoid safety risks caused by operational errors; during the separate operation, the standby automatic switching device can forcibly lock the closing pressure plate operation authority, and only authorize the operation and maintenance senior account to unlock it; therefore, the working method of the main coupling switch control unit circuit of the present invention solves the technical problems in the prior art such as the wide variety of wiring leading to complex on-site construction, extended debugging and acceptance cycles, and difficult troubleshooting, and achieves beneficial effects: by standardizing the connection of key functional modules such as energy storage power supplies, closing pressure plates, and selective jump pressure plates, the traditional scattered wiring is integrated into a standardized loop, and through standardized pressure plate switching logic and multi-stage control strategies, the manual intervention link is reduced, and the main coupling switch mode is automatically switched, which significantly improves the reliability and response speed of the main coupling switch operation, simplifies the construction process, and shortens the construction and maintenance time.

[0060] In one embodiment, it further includes: When the busbar split operation is restored, the closing pressure plate and the selective tripping pressure plate are withdrawn to disconnect the closing control path and the selective tripping control path.

[0061] It's important to note that after the pressure plate is released, the backup automatic switching device can execute a signal reset command (such as clearing the loop closing flag) to prevent historical signals from interfering with subsequent logic decisions. Therefore, by designing a separate loop closing / tripping pressure plate after separate operation, operating mode isolation and equipment protection are achieved, significantly improving system safety, O&M efficiency, and equipment lifespan. This design is suitable for low-voltage distribution systems that require strict distinction between operating states.

[0062] like Figure 1 As shown, an optional working process of the bus tie switch control unit circuit and working method thereof in the present invention is as follows: Closing the energy storage power supply switch so that the live wire end of the AC power supply of the backup automatic switching device is electrically connected to the live wire end of the energy storage power supply of the bus tie switch to form a live wire path; Through the energy storage power supply circuit, the AC power neutral terminal of the backup automatic switching device is electrically connected to the energy storage power neutral terminal of the bus tie switch to form a neutral line path, and the energy storage indicator light is on; The closing pressure plate is put into operation, so that the automatic closing terminal of the standby automatic switching device is electrically connected to the closing coil control terminal of the bus tie switch, forming an automatic closing control path: Through the automatic opening control circuit, the automatic opening terminal of the standby automatic switching device is electrically connected to the opening coil control terminal of the bus tie switch, forming an automatic opening control path, and the opening position indicator light is on; When the first incoming line and the second incoming line are normal, the closing pressure plate and the selective tripping pressure plate are not put into operation, the closing control path and the selective tripping control path are not formed, the bus tie breaker is opened, and the first incoming line and the second incoming line are used to independently power the first bus and the second bus, respectively, forming a separate operation, and the position indicator light is on; When it is detected that the first incoming line has a fault or needs maintenance, the closing pressure plate is put into operation, so that the closing pressure plate control end of the standby automatic switching device is electrically connected to the remote signal common end of the bus tie switch, forming a closing control path, allowing the bus tie switch to be closed, and the standby automatic switching device sends a closing instruction to the bus tie switch through the closing pressure plate, the bus tie switch is closed, the closed position indicator light is on, and the open position indicator light is off; at the same time, the tripping pressure plate is put into operation, so that the tripping pressure plate control end of the standby automatic switching device is electrically connected to the remote signal common end of the bus tie switch, forming a tripping control path, and the standby automatic switching device triggers the tripping of the first incoming line through the tripping control signal, and supplies power to the first bus and the second bus through the second incoming line; When the first incoming line is rectified or maintenance is completed, the closing pressure plate and the selective tripping pressure plate are kept in operation, the closing control path and the selective tripping control path are maintained, and the standby automatic switching device detects through the closing control path that the power data of the first incoming line and the second incoming line meet the separation conditions and sends a tripping instruction to the main coupling switch. The main coupling switch is opened, and independent power is supplied through the first incoming line and the second incoming line respectively, and the separation operation is restored. The opening position indicator light is on, and the closing position indicator light is off.

[0063] Furthermore, the terms "first" and "another" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" or "several" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the description of this specification, the reference terms "one embodiment", "an example", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0066] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bus tie switch control unit circuit, characterized in that: include: An energy storage power switch, one end of which is used to electrically connect to the live wire end of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the live wire end of the energy storage power supply of the bus tie switch; An energy storage power supply circuit, one end of which is used to electrically connect to the neutral line terminal of the AC power supply of the backup automatic switching device, and the other end of which is used to electrically connect to the neutral line of the energy storage power supply of the bus tie switch; A closing pressure plate, one end of which is used to electrically connect to the closing pressure plate control end of the standby automatic switching device, and the other end of which is used to electrically connect to the remote signal common end of the bus tie switch; A selective jump pressure plate, the selective jump pressure plate is connected in parallel with the closing pressure plate, one end of the selective jump pressure plate is used to electrically connect to the remote signal common terminal of the bus tie switch, and the other end of the selective jump pressure plate is used to electrically connect to the selective jump pressure plate control terminal of the standby automatic switching device; A closing pressure plate, one end of which is used to electrically connect to the automatic closing terminal of the backup automatic switching device, and the other end of which is used to electrically connect to the closing coil control terminal of the bus tie switch; An automatic tripping control circuit, one end of which is used to electrically connect to the automatic tripping terminal of the standby automatic switching device, and the other end of which is used to electrically connect to the tripping coil control end of the bus tie switch.

2. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes a closing button, which is connected in series with the closing pressure plate, and the other end of the closing button is used to electrically connect to the manual closing terminal of the standby automatic switching device.

3. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes a trip button, which is connected in parallel with the automatic trip control circuit. One end of the trip button is used to electrically connect to the trip coil control end of the main switch, and the other end of the trip button is used to electrically connect to the manual trip terminal of the standby automatic switching device.

4. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes a closing indicator light, one end of which is used to electrically connect to the remote signal 24V positive power supply end of the standby automatic transfer device, and the other end of which is used to electrically connect to the switch closing contact of the busbar switch.

5. The bus tie switch control unit circuit according to claim 4, characterized in that: It also includes a position indicator light, which is connected in parallel with the closed position indicator light. One end of the position indicator light is used to electrically connect to the remote signal 24V positive power supply end of the standby automatic transfer device, and the other end of the position indicator light is used to electrically connect to the switch position contact of the main switch.

6. The bus tie switch control unit circuit according to claim 5, characterized in that: It also includes a switch position signal line, which is connected in parallel with the position indicator light. One end of the switch position signal line is used to electrically connect the switch position contact of the main switch, and the other end of the switch position signal line is used to electrically connect the switch position signal end of the standby automatic transfer device.

7. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes an energy storage indicator light, which is connected in parallel with the energy storage power supply circuit. One end of the energy storage indicator light is used to electrically connect to the AC power neutral line end of the standby automatic transfer device, and the other end of the energy storage indicator light is used to electrically connect to the energy storage indicator light signal end of the busbar switch.

8. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes a remote signal transmission circuit, which is connected in parallel with the closing pressure plate and the selection pressure plate. One end of the remote signal transmission circuit is used to electrically connect the remote signal common end of the main switch, and the other end of the remote signal transmission circuit is used to electrically connect the remote signal common end of the standby automatic transfer device.

9. The bus tie switch control unit circuit according to claim 1, characterized in that: It also includes a switch fault signal transmission line, one end of which is used to electrically connect to the fault position signal end of the standby automatic switching device, and the other end of which is used to electrically connect to the switch fault position signal end of the busbar switch.

10. A method for operating a bus tie switch control unit circuit, characterized in that: The bus tie switch control unit circuit according to any one of claims 1 to 9 comprises: The energy storage power supply switch is closed and the closing pressure plate is engaged, thereby forming a live line path, a neutral line path, an automatic closing control path, and an automatic opening control path through the energy storage power supply circuit and the automatic opening control circuit; When the line is normal, the closing pressure plate and the tripping pressure plate are not put into operation, the bus tie breaker is opened, and the busbar is operated in separate columns; When a line fails or is under maintenance, the closing pressure plate and the selective tripping pressure plate are put into operation to form a closing control path and a selective tripping control path, and the standby automatic switching device controls the bus tie breaker to close and trips the faulty or under maintenance line; When the line is cleared of faults or maintenance is completed, the closing pressure plate and the selective tripping pressure plate are kept in operation, the closing control path and the selective tripping control path are maintained, and the standby automatic switching device controls the bus tie breaker to open, and the busbar separate operation is restored.

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