Control system and control method for remotely controlling ice melting short circuit breaker of current collection circuit

Abstract

The invention discloses a control system and a control method for a remote control ice melting short circuit breaker of a current collection circuit, and relates to the technical field of disaster prevention and reduction of a power system. The control system has the functions of fault diagnosis and protection of ice melting switch misoperation, overcurrent and the like, and the control system can be used for preventing and controlling the ice melting switch in case of false closing of the ice melting switch and false power transmission in a closing state of the ice melting switch. The system can quickly diagnose and quickly trip before the action of other protection devices, so that a large-range power failure accident is avoided; an auxiliary switch and visual double-confirmation mode is adopted, so that the closing state of the circuit breaker can be effectively judged, and misoperation and unreliable operation in an ice melting process and a power transmission process after ice melting caused by improper closing of the switch can be prevented; the energy storage logic of the circuit breaker is changed, energy can be stored only when a circuit breaker energy storage instruction is sent out through background remote control and other safety conditions after detection are met, and it is guaranteed that the circuit breaker cannot be switched on due to misoperation and cannot trigger large-area power outage accidents in the normal state that a current collection circuit is electrified.

Description

Technical Field

[0001] This invention relates to the field of disaster prevention and mitigation technology in power systems, specifically to a control system and control method for a remote-controlled ice-melting short-circuit circuit breaker for power lines. Background Technology

[0002] The wind farm is located in a high-altitude micro-topographical area. Winter cold waves cause severe icing on the wind turbines, transmission lines, and overhead collector lines, ultimately leading to large-scale grid disconnection. To reduce icing damage to overhead collector lines, de-icing short-circuit switches need to be installed at the ends of the 35kV collector lines to work with the de-icing system. Currently, the de-icing short-circuit switches are manually operated. When de-icing different collector lines, operators must travel several kilometers to different mountain peaks to manually short-circuit them. This is difficult to implement on-site after roads become icy, resulting in low de-icing efficiency and significant safety risks.

[0003] Patent application No. 2024223982438, entitled "A Control System for a Remote-Controlled De-icing Short-Circuit Switch for Wind Power Collector Lines," discloses a short-circuit switch capable of remotely de-icing wind power collector lines. It also includes an intelligent control system that enables remote signaling, telemetry, and remote control of the high-voltage disconnector switch's status, as well as video monitoring, ensuring the normal and stable operation of the de-icing equipment and effectively improving the de-icing efficiency of wind farm collector lines. However, because the de-icing short-circuit switch based on the disconnector switch lacks current detection and live switching capabilities, it cannot quickly diagnose and trip the circuit breaker to prevent accidents in situations such as line overcurrent during de-icing, accidental manual closing of the de-icing switch under normal conditions, or accidental energization while the de-icing switch is closed.

[0004] Application number 2025101417532, entitled "Switching device and ice-melting system for power line melting system", describes a device based on a high-voltage circuit breaker as an ice-melting short-circuit switch. It is also remotely controlled, but only a simple structure is disclosed. The control, fault diagnosis, safety and reliability aspects are not specifically mentioned, which prevents the ice-melting short-circuit circuit breaker from playing its true role. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a control system and method for a remote-controlled de-icing short-circuit circuit breaker for power collection lines. This system enables remote control of the de-icing short-circuit circuit breaker, ensuring the circuit breaker is properly closed through dual confirmation via auxiliary switches and video images. This guarantees the normal and stable operation of the de-icing equipment and enables fault self-diagnosis, thereby improving the de-icing efficiency of wind farms.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A control system for a remote-controlled ice-melting short-circuit circuit breaker for a power line is disclosed. The remote-controlled ice-melting short-circuit circuit breaker is installed at the end of a 35kV power line and consists of a protective housing, a high-voltage circuit breaker body, a control box, and a control system. The control system includes a power supply and lightning protection system, a battery and management system, an intelligent control terminal and peripheral circuits and equipment, a main line live-line anti-operation hardware circuit, a circuit breaker operating mechanism and related circuits, and a host computer. Remote signaling, telemetry, and remote control of the ice-melting short-circuit circuit breaker are achieved through communication between the host computer and the control terminal. The main line live-line non-operation hardware circuit consists of a circuit breaker energy storage motor non-operation circuit and a circuit breaker closing live-line non-operation circuit. The main line live-line non-operation hardware circuit controls the ice-melting short-circuit circuit breaker to not automatically store energy under the normal state of the energized collector line. Energy can only be stored when the ice-melting short-circuit circuit breaker is remotely controlled by the background software and other corresponding safety conditions are met. The ice-melting short-circuit circuit breaker cannot be electrically closed under normal state. A pointer linked with the connecting rod is installed on the outside of the high-voltage circuit breaker body, and corresponding "open" and "close" marks are set. The camera in the system is aligned with the marks. The opening and closing status of the ice-melting short-circuit circuit breaker is double-confirmed by the auxiliary switch signal of the ice-melting short-circuit circuit breaker in the opening and closing position and the pointer position image information captured by the camera. Set up a rapid diagnosis and quick tripping procedure for short circuit faults caused by malfunction or accidental energization of the de-icing short-circuit circuit breaker. Under the premise that the collector line is energized, detect the line current and the opening and closing status of the circuit breaker. If there is any abnormality, control the de-icing short-circuit circuit breaker to trip before other protection devices.

[0007] The intelligent control terminal and peripheral circuits and equipment include an intelligent control terminal and connected cabinet temperature and humidity sensor, ambient temperature sensor, heater, fiber optic communication and monitoring module and 4G network-based communication and monitoring module. The fiber optic communication and monitoring module and the 4G network-based communication and monitoring module are connected by corresponding communication lines and cameras. The heater is controlled by the data information from the temperature and humidity sensor to ensure the normal operation of the internal components of the protective shell.

[0008] The circuit breaker operating mechanism and related circuits include an energy storage motor, a closing electromagnet, a opening electromagnet, a three-phase current transformer, and a switch status sensor. The intelligent control terminal is equipped with an energy storage motor drive circuit, a closing coil drive circuit, an opening coil drive circuit, a current detection circuit, and a voltage detection circuit. The energy storage motor drive circuit is connected to the energy storage motor via a circuit breaker energy storage live-line failure circuit. The closing coil drive circuit is connected to the closing electromagnet via a circuit breaker closing live-line failure circuit. The opening coil drive circuit is connected to the opening electromagnet. The three-phase current transformer is connected to the current detection circuit. The switch status sensor is connected to the switch input interface of the intelligent control terminal. The intelligent control terminal determines whether a malfunction has occurred by using the line voltage information detected by the voltage detection circuit, the current information detected by the current detection circuit, and the status information of the switch status sensor.

[0009] The main line energized refusal-to-operate hardware circuit includes a step-down transformer, a rectifier module, a filter capacitor, a DC smoothing circuit, a voltage regulator circuit, a voltage comparator, a relay coil drive circuit, and an energized refusal-to-operate relay. The step-down transformer converts the 35kV collector line into a low-voltage AC signal, which is then converted into a DC voltage signal U1 that is basically proportional to the collector line voltage after passing through the rectifier module, filter capacitor, and DC smoothing circuit in sequence. The battery voltage of the power system is converted into an adjustable voltage threshold U0 through the voltage regulator circuit and voltage regulator circuit in sequence. The voltage threshold U0 is connected to the non-inverting input terminal of the voltage comparator, and the DC voltage signal U1 is connected to the inverting input terminal of the voltage comparator. The output terminal of the voltage comparator is connected to the relay coil drive circuit of the energized refusal-to-operate relay. The normally open contact K1 of the energized refusal-to-operate relay is connected in series with the positive voltage terminal of the energy storage motor and the positive voltage terminal of the closing electromagnet.

[0010] A control method for a remote-controlled ice-melting short-circuit circuit breaker for a power line is provided, applied to the control system of the aforementioned remote-controlled ice-melting short-circuit circuit breaker. The method includes automatic closing control and fault self-diagnosis control of the ice-melting short-circuit circuit breaker, and is implemented through the following steps: Step S1: The host computer sends a remote energy storage command; Step S2: After receiving the energy storage command, the intelligent control terminal determines the ambient temperature based on the detected ambient temperature. If the ambient temperature is higher than the temperature threshold, alarm code 1 is sent and the process ends; if the ambient temperature is lower than the temperature threshold, proceed to the next step. Step S3: The intelligent control terminal detects the voltage of the collector line. If the collector line is energized, alarm code 2 is sent, and the process ends; if the collector line is not energized, proceed to the next step. Step S4: The intelligent control terminal controls the circuit breaker's energy storage; Step S5: If the main line is energized and the operating hardware circuit detects that the collector line is energized, it sends alarm code 3 and the process ends; if the main line is energized and the operating hardware circuit detects that the collector line is not energized, the energy storage motor starts and proceeds to the next step. Step S6: The energy storage motor starts, and within the time threshold, the intelligent control terminal does not detect an energy storage completion signal, sends alarm code 4, and the process ends; The energy storage motor starts, and within the time threshold, the intelligent control terminal detects an energy storage completion signal, the energy storage motor stops, and proceeds to the next step. Step S7: The intelligent control terminal sends the energy storage completion signal to the backend, and the process ends; the energy storage status of the de-icing short-circuit breaker is observed through the camera view of the backend software, and the de-icing short-circuit breaker is closed. Step S8: The background software issues a remote closing command; Step S9: After receiving the closing command, the intelligent control terminal judges the ambient temperature. If the ambient temperature is higher than the temperature threshold, it sends alarm code 5 and the process ends; if the ambient temperature is lower than the temperature threshold, it proceeds to the next step. Step S10: The intelligent control terminal detects the voltage of the collector line. If the line is found to be carrying 35kV voltage, alarm code 6 is sent and the process ends; if the collector line is found to be de-energized, proceed to the next step. Step S11: The intelligent control terminal controls the de-icing short-circuit circuit breaker to close; Step S12: The main line energized failure hardware circuit detects that the collector line is energized, the closing electromagnet does not operate, and the circuit breaker does not close; the main line energized failure hardware circuit detects that the collector line is not energized, the closing electromagnet operates, triggering the circuit breaker to close; when no current is detected in the closing electromagnet, it is diagnosed that the main line energized failure hardware has not operated, the voltage detection circuit is faulty, and alarm code 7 is sent. Step S13: When the closing electromagnet is energized and the intelligent control terminal does not detect the closing signal within the time threshold, alarm code 8 is sent and the process ends. Step S14: When the closing electromagnet is energized and within the time threshold, the intelligent control terminal detects the closing position signal, the closing electromagnet is de-energized, and the process proceeds to the next step. Step S15: After confirming that the circuit breaker is closed, refresh the remote signaling signal and send it to the backend; Step S16: The process ends. The status of the opening and closing indicator pointer of the de-icing short-circuit switch can be observed through the camera view of the background software. After the video confirms that the switch is closed, the line is powered on to de-ic. The alarm code displayed in the backend is as follows: Alarm 1: There is no ice damage on the power collection line; this is an operational error. Alarm 2: The power supply line was not de-energized; this is an operational error. Alarm 3: Motor drive circuit failure; voltage detection circuit failure; Alarm 4: Motor drive circuit failure; switch closing failure; Alarm 5: There is no ice damage on the power collection line; this is an operational error. Alarm 6: The collector line is not de-energized; this is an operational error. Alarm 7: The collector line is not de-energized; the voltage detection circuit is faulty. Alarm 8: Closing failure.

[0011] The present invention has the following beneficial effects: 1. The control system has fault diagnosis and protection functions for malfunction of the de-icing switch, overcurrent, etc. In the event of overcurrent, malfunction of de-icing switch in normal operation of the collector line, or malfunction of power supply when de-icing switch is closed, the system can quickly diagnose and trip the circuit breaker before other protection devices, thus avoiding large-scale power outage accidents. 2. A dual confirmation method using auxiliary switches and visual inspection was adopted to ensure effective judgment of the circuit breaker's closing status and prevent misoperation and unreliable operation during the de-icing process and the power-on process after de-icing due to incomplete switch closing. 3. The energy storage logic of the circuit breaker has been changed. Under the normal condition of the collector line being energized, the de-icing short-circuit circuit breaker cannot automatically store energy after the closing spring energy is released. It can only store energy when the operator remotely issues an energy storage command to the circuit breaker and meets other safety conditions after testing. This ensures that the circuit breaker will not malfunction and close under the normal condition of the collector line being energized, and will not trigger a large-scale power outage accident. 4. A hardware circuit for preventing operation when the main line is energized was designed. It is not controlled by the control terminal and realizes energization detection through pure hardware circuit. When the line is energized, even if the control terminal issues an erroneous action command, the de-icing switch will not store energy or close, thus avoiding power outage accidents caused by the de-icing switch malfunction. 5. The energization judgment and relay drive part of the main line energized failure hardware circuit adopts reverse logic design, which solves the problems of coil heating, circuit failure, functional failure and unreliability caused by conventional interlock relays being in the energized state for a long time. 6. A strict closing action control and automatic fault diagnosis control program has been designed to ensure the reliability of the closing action of the de-icing short-circuit circuit breaker. It has a high degree of intelligence and realizes rapid de-icing of the collection line through remote control, which greatly improves the de-icing efficiency, saves manpower, ensures personnel safety, and greatly reduces the economic losses caused by accidents. It is suitable for large-scale application in wind farms. Attached Figure Description

[0012] Figure 1 The schematic diagram of the control system for the de-icing short-circuit circuit breaker; Figure 2 This is a diagram showing the outer shape of the protective casing of the de-icing short-circuit circuit breaker; Figure 3 This is a view of the other side of the protective casing of the de-icing short-circuit circuit breaker. Figure 4 A schematic diagram of the main circuit's energized and non-operating hardware circuit; Figure 5 This is a schematic diagram of the control method flow. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: like Figure 1-3 As shown, the control system of the remote-controlled ice-melting short-circuit circuit breaker for the power collection line is located at the end of the 35kV power collection line. It consists of a protective housing 1, a high-voltage circuit breaker body, a control box, and a control system. The control system of the remote-controlled ice-melting short-circuit circuit breaker includes a power supply and lightning protection system 01, a battery and management system 02, an intelligent control terminal and peripheral circuits and equipment 03, a main line live-line anti-operation hardware circuit 04, a circuit breaker operating mechanism and related circuits 05, and a host computer. The remote signaling, telemetry, and remote control of the ice-melting short-circuit circuit breaker are realized through communication between the host computer and the control terminal.

[0014] The main line live-line non-operation hardware circuit 04 consists of a circuit breaker energy storage motor non-operation circuit 041 and a circuit breaker closing live-line non-operation circuit 042. The main line live-line non-operation hardware circuit 04 controls the de-icing short-circuit circuit breaker to not automatically store energy under the normal state of the energized collector line. Energy can only be stored when the de-icing short-circuit circuit breaker is remotely controlled by the background software and other corresponding safety conditions are met. The de-icing short-circuit circuit breaker cannot be electrically closed under normal state. A pointer linked with the connecting rod is installed on the outside of the high-voltage circuit breaker body, and corresponding "open" and "close" marks are set. The camera in the system is aligned with the marks. The opening and closing status of the ice-melting short-circuit circuit breaker is double-confirmed by the auxiliary switch signal of the ice-melting short-circuit circuit breaker in the opening and closing position and the pointer position image information captured by the camera. Set up a rapid diagnosis and quick tripping procedure for short circuit faults caused by malfunction or accidental energization of the de-icing short-circuit circuit breaker. Under the premise that the collector line is energized, detect the line current and the opening and closing status of the circuit breaker. If there is any abnormality, control the de-icing short-circuit circuit breaker to trip before other protection devices.

[0015] Specifically, the protective housing 1 consists of two parts: a high-voltage chamber 11 and a low-voltage chamber 12. The high-voltage chamber 11 houses the high-voltage circuit breaker body, and an observation window 13 is provided corresponding to the circuit breaker status indicator section for easy observation and maintenance by maintenance personnel and for 4G signal transmission and transmission within the protective housing. The interior contains circuit breaker mounting brackets, high-voltage cable inlet holes, etc. The low-voltage chamber 12 houses the control box of the control system. The protective housing 1, in conjunction with the internal temperature and humidity control system, ensures the protection of the switch against de-icing and short-circuiting in harsh environments and prevents icing in winter, thereby ensuring reliable operation of the switch and normal operation of the video monitoring system during icing periods.

[0016] The power supply and secondary lightning protection system 01 consists of a voltage transformer 011, a secondary lightning protection module 012, and a secondary EMI filter circuit 013. Due to the severe lightning hazards at wind power sites, in addition to adding surge arresters on the main line side and lightning protection module 012 on the low-voltage side, a secondary EMI filter circuit 013 is designed at the rear end of the lightning protection module 012 to attenuate electromagnetic interference signals, suppress backflow noise at the power input, improve the electromagnetic compatibility of the entire system, and enhance the lightning protection capabilities of the intelligent control terminal 031's battery management system, voltage detection port, and hardware anti-operation circuit.

[0017] The battery and management system 02 consists of a battery charging management module 021 and a lead-acid battery pack 022. When the main line is energized, the system draws power from the line through a voltage transformer 011 to maintain the operation of the control system and simultaneously charges the lead-acid battery pack 022. During the de-icing process, when the collector line is de-energized, the system automatically switches to power supply from the lead-acid battery 022, which can provide DC24V and DC12V power to ensure the normal operation of the intelligent control terminal, communication module, and camera, as well as the energy storage and opening / closing actions of the de-icing circuit breaker.

[0018] In a preferred embodiment, the intelligent control terminal and peripheral circuits and devices 03 include an intelligent control terminal 031 and connected to it an internal temperature and humidity sensor 032, an ambient temperature sensor 033, a heater 034, a fiber optic communication and monitoring module 035, and a 4G network-based communication and monitoring module 036. The fiber optic communication and monitoring module 035 and the 4G network-based communication and monitoring module 036 are connected by corresponding communication lines and cameras. The heater 034 is controlled by the data information from the temperature and humidity sensor 032 to ensure that the temperature inside the protective housing 1 is greater than 0 degrees Celsius, thereby ensuring that the de-icing short-circuit switch and video monitoring system do not freeze in winter and that they can reliably open and close and be monitored normally during the de-icing period.

[0019] The specific control method of the heater 034 is as follows: the control program of the intelligent control terminal 031 is set with a low temperature threshold L and a low temperature threshold H. The heater 034 is controlled to work according to the temperature and humidity data. When the temperature inside the protective shell 1 is lower than the low temperature threshold L, the intelligent control terminal 031 controls the heater 034 to heat up and at the same time controls the heat exchange fan of the heater 034 to start to improve the heating efficiency. At this time, the temperature inside the protective shell 1 continues to rise. When the temperature is higher than the low temperature threshold H, the intelligent control terminal 031 controls the heater to stop working. After a delay (e.g., 30 seconds), the heat exchange fan is stopped.

[0020] The intelligent control terminal 031 has independent 4G and fiber optic communication methods, enabling video monitoring and communication between the host computer and the de-icing short-circuit breaker. The fiber optic communication method involves connecting the intelligent control terminal 031 and the camera to a fiber optic module, which is then connected to the wind turbine's fiber optic network. A convergence switch is installed at the substation, and a ring network is established through the wind farm's fiber optic channel. The background software enables remote signaling, telemetry, and remote control of the de-icing circuit breaker under normal and de-icing conditions. The camera can also be used to observe the switch's opening and closing status, ice accumulation, surge arrester readings, and other statuses. Monitorable information includes the de-icing short-circuit breaker's energy storage status, opening and closing position information, primary line voltage, effective value of the three-phase current, ambient temperature, battery charge, cabinet temperature and humidity, total number of switch opening and closing operations, and control box temperature and humidity.

[0021] In a preferred embodiment, the circuit breaker operating mechanism and related circuits 05 include an energy storage motor 051, a closing electromagnet 052, a opening electromagnet 053, a three-phase current transformer 054, and a switch status sensor 055. The intelligent control terminal 031 is equipped with an energy storage motor drive circuit 037, a closing coil drive circuit 038, an opening coil drive circuit 039, a current detection circuit 030, and a voltage detection circuit 0300. A circuit breaker energy storage energized anti-operation circuit 041 is connected between the energy storage motor drive circuit 037 and the energy storage motor 051. The closing coil drive circuit 038 and the closing electromagnet 052 are connected to the circuit breaker closing live anti-operation circuit 042. The opening coil drive circuit 039 is connected to the opening electromagnet 053. The three-phase current transformer 054 is connected to the current detection circuit 030. The switch status sensor 055 is connected to the switch input interface of the intelligent control terminal 031. The intelligent control terminal 031 determines whether a malfunction has occurred by using the line voltage information detected by the voltage detection circuit 0300, the current information detected by the current detection circuit 030, and the status information of the switch status sensor 055.

[0022] like Figure 4As shown, in a preferred embodiment, the main line live-line failure-to-operate hardware circuit 04 includes a step-down transformer 040, a rectifier module 041, a filter capacitor 042, a DC smoothing circuit 043, a voltage regulator circuit 044, a voltage adjustment circuit 045, a voltage comparator 046, a relay coil drive circuit 047, and a live-line failure-to-operate relay 048. The step-down transformer 040 converts the 35kV collector line into a low-voltage AC signal, which is then converted into a voltage substantially proportional to the collector line voltage by passing through the rectifier module 041, the filter capacitor 042, and the DC smoothing circuit 043 connected in sequence. The DC voltage signal U1 and the battery voltage 049 of the power system are converted into an adjustable voltage threshold U0 through the sequentially connected voltage regulator circuit 044 and voltage regulating circuit 045. The voltage threshold U0 is connected to the non-inverting input terminal of the voltage comparator 046, and the DC voltage signal U1 is connected to the inverting input terminal of the voltage comparator 046. The output terminal of the voltage comparator 046 is connected to the relay coil drive circuit 047 of the energized non-operating relay 048. The normally open contact K1 of the energized non-operating relay 048 is connected in series with the positive voltage terminal of the energy storage motor 051 and the positive voltage terminal of the closing electromagnet 052. This constitutes a voltage comparison circuit with inverse logic. Under normal conditions, the collector line carries a 35kV voltage. At this time, U1 is greater than the voltage threshold U0, the operational amplifier A1 outputs a low level, and the energized anti-operation relay 048 does not operate. Since the normally open contact K1 of the energized anti-operation relay 048 is connected in series with the positive voltage terminals of the energy storage motor 051 and the closing electromagnet 052, even if the intelligent control terminal 031 issues incorrect energy storage and closing commands, driving relays K2 and K3 to operate, the energy storage motor 051 and the closing electromagnet 052 will still not operate. When the collector line is de-energized, U1 is less than the voltage threshold U0, the operational amplifier A1 outputs a high level, the coil of the energized anti-operation relay 048 is energized, the relay is energized, K1 is closed, and at this time, there is voltage at the positive voltage terminals of the energy storage motor 051 and the closing electromagnet 052, allowing the energy storage motor 051 and the closing electromagnet 052 to operate normally.

[0023] The main line live-line anti-operation hardware circuit 04 is independent of the control system and not controlled by the intelligent control terminal 031. It achieves live-line detection through pure hardware and controls the live-line anti-operation relay 048 to actuate. Even if the intelligent control terminal 031 issues an erroneous action command, causing the energy storage motor drive circuit 037 and the closing electromagnet drive circuit 038 to activate, the de-icing switch will not activate, preventing power outages caused by the de-icing switch erroneously closing. The circuit's voltage stabilizing circuit 044, voltage comparator 046, and voltage regulating circuit 045 allow the anti-maloperation threshold to be adjusted according to actual conditions. The live-line detection and relay drive sections of the circuit employ a reverse logic design, solving the problems of coil overheating, mechanical fatigue-induced circuit failures, and unreliability caused by conventional interlocking relays being in a continuously engaged state for extended periods.

[0024] like Figure 5 As shown, a control method for a remote-controlled ice-melting short-circuit circuit breaker for a power line is applied to the control system of the aforementioned remote-controlled ice-melting short-circuit circuit breaker. The method includes automatic closing control and fault self-diagnosis control of the ice-melting short-circuit circuit breaker, and is implemented through the following steps: Step S1: The background software 06 issues a remote energy storage command; Step S2: After receiving the energy storage command, the intelligent control terminal makes a judgment based on the detected ambient temperature value. When the ambient temperature is higher than the temperature threshold (e.g., 0℃), alarm code 1 is sent and the process ends; if the temperature is lower than the temperature threshold (e.g., 0℃), proceed to the next step. Step S3: If the above conditions are met, the intelligent control terminal detects the voltage of the collector line. When the line is detected to be carrying 35kV voltage, alarm code 2 is sent and the process ends; if the collector line is not energized, proceed to the next step. Step S4: When the above conditions are met, the intelligent control terminal controls the circuit breaker to store energy; Step S5: When the main line energized failure hardware circuit detects that the collector line is energized, the energized failure relay controlled by the circuit does not operate. At this time, the armature circuit of the energy storage motor cannot be connected, and the energy storage motor does not start. At this time, the intelligent control terminal detects that there is no current in the armature circuit of the energy storage motor, and diagnoses it as a failure of the hardware failure circuit. Then, alarm code 3 is sent, and the process ends. When the main line energized failure hardware circuit detects that the collector line is not energized, the energized failure relay controlled by the circuit operates, and the normally open contact closes. At this time, the armature circuit of the energy storage motor is connected, the energy storage motor starts, and the process proceeds to the next step. Step S6: When the energy storage motor starts and the intelligent control terminal does not detect the energy storage completion signal within the time threshold (e.g., 12 seconds), alarm code 4 is sent and the process ends; when the energy storage motor starts and the intelligent control terminal detects the energy storage completion signal within the time threshold (e.g., 12 seconds), the energy storage motor stops at the moment the energy storage completion signal is detected, and the process proceeds to the next step. Step S7: After the energy storage motor stops, the intelligent control terminal sends the energy storage completion signal to the background, and the process ends; at this time, the operator can observe the energy storage status of the de-icing short-circuit breaker through the camera view of the background software. When the video confirms that the energy storage is completed, the de-icing short-circuit breaker can be operated to close. Step S8: The background software issues a remote closing command; Step S9: After receiving the closing command, the intelligent control terminal makes a judgment based on the detected ambient temperature value. When the ambient temperature is higher than the temperature threshold (e.g., 0℃), the system sends alarm code 5 to the background software, and the process ends; if the temperature is lower than the temperature threshold (e.g., 0℃), proceed to the next step. Step S10: If the above conditions are met, the intelligent control terminal detects the voltage of the collector line. When the line is detected to be carrying 35kV voltage, alarm code 6 is sent and the process ends; if the collector line is not energized, proceed to the next step. Step S11: When the above conditions are met, the intelligent control terminal controls the de-icing short-circuit circuit breaker to close. Step S12: When the main line energized failure-to-operate hardware circuit detects that the collector line is energized, the energized failure-to-operate relay controlled by the circuit does not operate. At this time, the closing electromagnet circuit cannot be connected, the closing electromagnet does not operate, and the circuit breaker does not close. When the main line energized failure-to-operate hardware circuit detects that the collector line is not energized, the energized failure-to-operate relay controlled by the circuit operates, the normally open contact closes, the closing electromagnet circuit is connected, and the closing electromagnet operates to trigger the circuit breaker to close. When no current is detected in the closing electromagnet, it is diagnosed that the main line energized failure-to-operate hardware has not operated, the voltage detection circuit is faulty, and alarm code 7 is sent. Step S13: When the closing electromagnet is energized, and the intelligent control terminal does not detect the closing signal within the time threshold (e.g., 500 milliseconds), alarm code 8 is sent and the process ends. Step S14: When the closing electromagnet is energized, and within a time threshold (e.g., 500 milliseconds), the intelligent control terminal detects a closing signal, the closing electromagnet is de-energized at the moment the closing signal is detected, and proceeds to the next step. Step S15: Once the closing is confirmed, refresh the remote signaling signal and send it to the backend; Step S16: The process ends. At this time, the operator can observe the status of the opening and closing indicator pointer of the de-icing short-circuit switch through the camera view of the background software. When the video confirms that the switch is closed, the line can be powered on to de-ic.

[0025] The alarm code displayed in the backend is as follows: Alarm 1: There is no ice damage on the power collection line; this is an operational error. Alarm 2: The power supply line was not de-energized; this is an operational error. Alarm 3: Motor drive circuit failure; voltage detection circuit failure; Alarm 4: Motor drive circuit failure; switch closing failure; Alarm 5: There is no ice damage on the power collection line; this is an operational error. Alarm 6: The collector line is not de-energized; this is an operational error. Alarm 7: The collector line is not de-energized; the voltage detection circuit is faulty. Alarm 8: Closing failure.

[0026] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A control system for a remote-controlled de-icing short-circuit circuit breaker for a power line, wherein the remote-controlled de-icing short-circuit circuit breaker is installed at the end of a 35kV power line and consists of a protective housing (1), a high-voltage circuit breaker body, a control box, and a control system. The control system of the remote-controlled de-icing short-circuit circuit breaker includes a power supply and lightning protection system (01), a battery and management system (02), an intelligent control terminal and peripheral circuits and equipment (03), a main line live-line anti-operation hardware circuit (04), a circuit breaker operating mechanism and related circuits (05), and a host computer. The remote signaling, telemetry, and remote control of the de-icing short-circuit circuit breaker are realized through communication between the host computer and the intelligent control terminal. The system is characterized by: The main line live-line non-operation hardware circuit (04) consists of a circuit breaker energy storage motor non-operation circuit (041) and a circuit breaker closing live-line non-operation circuit (042). The main line live-line non-operation hardware circuit (04) controls the de-icing short-circuit circuit breaker to not automatically store energy under the normal state of the energized collection line. Energy can only be stored when the de-icing short-circuit circuit breaker is remotely controlled by the background software and under other corresponding safety conditions. The de-icing short-circuit circuit breaker cannot be electrically closed under normal state. A pointer linked with the connecting rod is installed on the outside of the high-voltage circuit breaker body, and corresponding "open" and "close" marks are set. The camera in the system is aligned with the marks. The opening and closing status of the ice-melting short-circuit circuit breaker is double-confirmed by the auxiliary switch signal of the ice-melting short-circuit circuit breaker in the opening and closing position and the pointer position image information captured by the camera. Set up a rapid diagnosis and quick tripping procedure for short circuit faults caused by malfunction or accidental energization of the de-icing short-circuit circuit breaker. Under the premise that the collector line is energized, detect the line current and the opening and closing status of the circuit breaker. If there is any abnormality, control the de-icing short-circuit circuit breaker to trip before other protection devices.

2. The control system for the remote-controlled ice-melting short-circuit circuit breaker for power collection lines according to claim 1, characterized in that, The intelligent control terminal and peripheral circuits and devices (03) include an intelligent control terminal (031) and connected to it an internal temperature and humidity sensor (032), an ambient temperature sensor (033), a heater (034), a fiber optic communication and monitoring module (035), and a 4G network-based communication and monitoring module (036). The fiber optic communication and monitoring module (035) and the 4G network-based communication and monitoring module (036) are connected by corresponding communication lines and cameras. The heater (034) is controlled by the data information of the temperature and humidity sensor (032) so that the internal components of the protective shell (1) can work normally.

3. The control system for the remote-controlled ice-melting short-circuit circuit breaker for power collection lines according to claim 1, characterized in that, The circuit breaker operating mechanism and related circuits (05) include an energy storage motor (051), a closing electromagnet (052), a opening electromagnet (053), a three-phase current transformer (054), and a switch status sensor (055). The intelligent control terminal (031) is equipped with an energy storage motor drive circuit (037), a closing coil drive circuit (038), an opening coil drive circuit (039), a current detection circuit (030), and a voltage detection circuit (0300). The energy storage motor drive circuit (037) and the energy storage motor (051) are connected to a circuit breaker energy storage live-line failure circuit (041). The closing coil... The drive circuit (038) is connected to the closing electromagnet (052) via a circuit breaker closing live-line failure circuit (042). The opening coil drive circuit (039) is connected to the opening electromagnet (053). The three-phase current transformer (054) is connected to the current detection circuit (030). The switch status sensor (055) is connected to the switch input interface of the intelligent control terminal (031). The intelligent control terminal (031) determines whether a malfunction has occurred by using the line voltage information detected by the voltage detection circuit (0300), the current information detected by the current detection circuit (030), and the status information of the switch status sensor (055).

4. The control system for the remote-controlled ice-melting short-circuit circuit breaker for power collection lines according to claim 1, characterized in that, The main line live-line failure-to-operate hardware circuit (04) includes a step-down transformer (040), a rectifier module (041), a filter capacitor (042), a DC smoothing circuit (043), a voltage regulator circuit (044), a voltage adjustment circuit (045), a voltage comparator (046), a relay coil drive circuit (047), and a live-line failure-to-operate relay (048). The step-down transformer (040) converts the 35kV collector line into a low-voltage AC signal, which is then converted into a DC signal that is basically proportional to the collector line voltage after passing through the rectifier module (041), filter capacitor (042), and DC smoothing circuit (043) connected in sequence. The voltage signal U1, the battery voltage of the power system, is converted into an adjustable voltage threshold U0 through the voltage regulator circuit (044) and voltage regulator circuit (045) connected in sequence. The voltage threshold U0 is connected to the non-inverting input terminal of the voltage comparator (046), and the DC voltage signal U1 is connected to the inverting input terminal of the voltage comparator (046). The output terminal of the voltage comparator (046) is connected to the relay coil drive circuit (047) of the energized non-operating relay (048). The normally open contact K1 of the energized non-operating relay (048) is connected in series with the positive voltage terminal of the energy storage motor (051) and the positive voltage terminal of the closing electromagnet (052).

5. A control method for a remote-controlled ice-melting short-circuit circuit breaker for a power line, applied to the control system of the remote-controlled ice-melting short-circuit circuit breaker for a power line as described in claims 1-4, characterized in that, It includes automatic closing control of the de-icing short-circuit circuit breaker and fault self-diagnosis control, which is achieved through the following steps: Step S1: The host computer sends a remote energy storage command; Step S2: After receiving the energy storage command, the intelligent control terminal determines the ambient temperature based on the detected ambient temperature. If the ambient temperature is higher than the temperature threshold, alarm code 1 is sent and the process ends; if the ambient temperature is lower than the temperature threshold, proceed to the next step. Step S3: The intelligent control terminal detects the voltage of the collector line. If the collector line is energized, alarm code 2 is sent, and the process ends; if the collector line is not energized, proceed to the next step. Step S4: The intelligent control terminal controls the circuit breaker's energy storage; Step S5: If the main line is energized and the operating hardware circuit detects that the collector line is energized, it sends alarm code 3 and the process ends; if the main line is energized and the operating hardware circuit detects that the collector line is not energized, the energy storage motor starts and proceeds to the next step. Step S6: The energy storage motor starts, and within the time threshold, the intelligent control terminal does not detect an energy storage completion signal, sends alarm code 4, and the process ends; The energy storage motor starts, and within the time threshold, the intelligent control terminal detects an energy storage completion signal, the energy storage motor stops, and proceeds to the next step. Step S7: The intelligent control terminal sends the energy storage completion signal to the backend, and the process ends; the energy storage status of the de-icing short-circuit breaker is observed through the camera view of the backend software, and the de-icing short-circuit breaker is closed. Step S8: The background software issues a remote closing command; Step S9: After receiving the closing command, the intelligent control terminal judges the ambient temperature. If the ambient temperature is higher than the temperature threshold, it sends alarm code 5 and the process ends; if the ambient temperature is lower than the temperature threshold, it proceeds to the next step. Step S10: The intelligent control terminal detects the voltage of the collector line. If the line is found to be carrying 35kV voltage, alarm code 6 is sent and the process ends; if the collector line is found to be de-energized, proceed to the next step. Step S11: The intelligent control terminal controls the de-icing short-circuit circuit breaker to close; Step S12: The main line energized failure hardware circuit detects that the collector line is energized, the closing electromagnet does not operate, and the circuit breaker does not close; the main line energized failure hardware circuit detects that the collector line is not energized, the closing electromagnet operates, triggering the circuit breaker to close; when no current is detected in the closing electromagnet, it is diagnosed that the main line energized failure hardware has not operated, the voltage detection circuit is faulty, and alarm code 7 is sent. Step S13: When the closing electromagnet is energized and the intelligent control terminal does not detect the closing signal within the time threshold, alarm code 8 is sent and the process ends. Step S14: When the closing electromagnet is energized and within the time threshold, the intelligent control terminal detects the closing position signal, the closing electromagnet is de-energized, and the process proceeds to the next step. Step S15: After confirming that the circuit breaker is closed, refresh the remote signaling signal and send it to the backend; Step S16: The process ends. The status of the opening and closing indicator pointer of the de-icing short-circuit switch can be observed through the camera view of the background software. After the video confirms that the switch is closed, the line is powered on to de-ic. The alarm code displayed in the backend is as follows: Alarm 1: There is no ice damage on the power collection line; this is an operational error. Alarm 2: The power supply line was not de-energized; this is an operational error. Alarm 3: Motor drive circuit failure; voltage detection circuit failure; Alarm 4: Motor drive circuit failure; switch closing failure; Alarm 5: There is no ice damage on the power collection line; this is an operational error. Alarm 6: The collector line is not de-energized; this is an operational error. Alarm 7: The collector line is not de-energized; the voltage detection circuit is faulty. Alarm 8: Closing failure.

Images