Extra-high voltage wire uninterrupted ground wire ice melting device and control method thereof

Abstract

The embodiment of the invention provides an extra-high voltage wire uninterrupted ground wire ice melting device and a control method thereof, and belongs to the technical field of power system operation and maintenance. The device comprises an extra-high voltage ground wire ice melting primary system which at least comprises a group of ground wire ice melting circuits and is used for converting an external power supply into direct-current heating current and applying the direct-current heating current to two ends of a ground wire; the extra-high voltage ground wire ice melting secondary system comprises a control module used for monitoring and controlling the operation state of each execution module in the extra-high voltage ground wire ice melting primary system, and an information interaction module used for collecting the operation parameters of the extra-high voltage ground wire ice melting primary system and uploading the operation parameters to a main station or a regulation and control system. The extra-high voltage ground wire ice melting power supply system comprises at least one commercial power supply device and at least one standby power supply device, and is used for supplying power to the extra-high voltage ground wire ice melting primary system and the extra-high voltage ground wire ice melting secondary system. According to the scheme, the continuity of ground wire ice melting operation and the stability of system operation are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of power system operation and maintenance technology, specifically to an ultra-high voltage (UHV) conductor ground wire de-icing device and a control method for the UHV conductor ground wire de-icing device. Background Technology

[0002] With the continuous construction and operation of ultra-high voltage power transmission projects in my country, the operational stability of transmission lines in complex geographical environments faces higher requirements. Especially in high-latitude, high-altitude, or mountainous areas, transmission lines often face severe icing problems in winter. Overhead ground wires, due to their high exposure and small heat capacity, are more prone to ice accumulation, leading to increased ground wire sag, excessive mechanical tension, and even serious faults such as wire jumps and breaks, seriously threatening the safe and stable operation of the lines.

[0003] To address the problem of ground wire icing, existing technologies mainly rely on manual ice removal, power outages for heating and de-icing, or the installation of mechanical de-icing devices. However, manual inspection and de-icing are inefficient, pose high safety risks, and are unsuitable for large-scale, continuous freezing weather; while power outages for de-icing disrupt power supply continuity, which is unacceptable, especially in ultra-high voltage (UHV) backbone networks. Some technologies propose short-term energized de-icing of ground wires, but these often only support a single power source, lack redundancy, and are ill-equipped to handle actual power outages and power fluctuations, resulting in insufficient system reliability and continuity.

[0004] Furthermore, in traditional ground wire de-icing devices, the control system mostly adopts an independent or localized structure, lacking effective communication with substations and control centers, making it difficult to achieve remote control, status monitoring, and centralized management. This "information silo" operation mode not only affects response efficiency but also makes it difficult to obtain key parameters such as equipment failure, de-icing progress, and temperature changes in a timely manner, limiting the level of intelligence and automation of ground wire de-icing operations.

[0005] Therefore, how to achieve a highly reliable, controllable, and information-visible ground wire de-icing solution under the condition of no power outage remains a technical challenge in the operation and maintenance of power systems. Summary of the Invention

[0006] The purpose of this invention is to provide an ultra-high voltage conductor ground wire de-icing device and its control method, so as to at least solve the problems in the prior art that ground wire de-icing operations cannot be carried out stably under the energized state of the transmission line, and that the system has a single power supply path and lacks power redundancy.

[0007] To achieve the above objectives, the first aspect of the present invention provides an ultra-high voltage (UHV) conductor ground wire de-icing device, the device comprising: an UHV ground wire de-icing primary system, an UHV ground wire de-icing secondary system, and an UHV ground wire de-icing power supply system; the UHV ground wire de-icing primary system includes at least one ground wire de-icing circuit for converting external power into DC heating current and applying it to both ends of the ground wire; the UHV ground wire de-icing secondary system includes a control module for monitoring and controlling the operating status of each execution module in the UHV ground wire de-icing primary system, and an information interaction module for collecting the operating parameters of the UHV ground wire de-icing primary system and uploading them to the main station or control system; the UHV ground wire de-icing power supply system includes at least one mains power supply device and at least one backup power supply device for supplying power to the UHV ground wire de-icing primary system and the UHV ground wire de-icing secondary system.

[0008] Optionally, the UHV ground wire de-icing primary system includes multiple ground wire de-icing circuits connected in parallel. Each group of ground wire de-icing circuits is sequentially connected to: a power conversion unit for converting the input voltage and current parameters into AC power suitable for ground wire heating; a rectifier unit for converting the AC power into DC power; an operation protection unit for cutting off the power supply path in case of circuit abnormality; and an output unit for applying DC current to both ends of the ground wire through a cable. The multiple ground wire de-icing circuits are interconnected through a circuit switching unit, which is used to switch the load to other normal circuits when one group of ground wire de-icing circuits fails.

[0009] Optionally, the output unit is connected to both ends of the ground wire of the transmission line via insulated cables. The output path is provided with an output path switching unit, which is used to select the conduction path among multiple ground wire sections and control the current application range to achieve segmented ground wire de-icing.

[0010] Optionally, the UHV ground wire de-icing secondary system includes a control module, which includes: a power conversion control unit for adjusting the working state of the power conversion unit and setting the output voltage parameters, the power conversion control unit establishing a communication connection with the power conversion unit; a rectifier control unit for controlling the operating mode of the rectifier unit and adjusting the rectifier output characteristics, the rectifier control unit communicating with the rectifier unit; a switching control unit for controlling the conduction state of the circuit switching unit and the output path switching unit, the switching control unit communicating with the two switching units respectively; and an output control unit for controlling the start / stop state of the output unit and setting the upper limit of the output current, the output control unit communicating with the output unit.

[0011] Optionally, the information interaction module in the UHV ground wire de-icing secondary system includes: a multi-channel data interface unit for acquiring status signals and operating parameters from the power conversion control unit, rectifier control unit, switching control unit, and output control unit; a protocol adaptation unit for converting the acquired data into a format and generating data packets that support standard protocols; a data processing unit for real-time caching, anomaly preprocessing, and verification marking of the acquired data; and a communication security unit for implementing data integrity verification and link anomaly alarms. The information interaction module supports bidirectional communication with the substation or control system.

[0012] Optionally, the UHV ground wire de-icing power system includes: a grid input unit for receiving external AC power; a voltage conversion unit electrically connected to the grid input unit for converting high-voltage input into low-voltage output adapted for use by the control system; a standby power generation unit electrically connected to the voltage conversion unit for providing backup power when the grid power supply is abnormal; and a power switching unit located between the grid input unit and the standby power generation unit for automatic switching between primary and backup power supplies. The output terminal of the voltage conversion unit is connected to the UHV ground wire de-icing primary system and the UHV ground wire de-icing secondary system respectively via power supply lines.

[0013] Optionally, the primary system, secondary system and power supply system of the UHV ground wire de-icing system are all integrated and encapsulated in a structural housing with dustproof, waterproof and corrosion-resistant functions; the UHV conductor uninterrupted ground wire de-icing device is set within a preset range of the transmission line tower and is connected to the ground wire end point and the power supply access point respectively through insulated cables.

[0014] The second aspect of this invention provides a control method for an ultra-high voltage (UHV) conductor ground wire de-icing device that is not subject to power outages. The method is applied to the aforementioned UHV conductor ground wire de-icing device and includes: a control module of the UHV ground wire de-icing secondary system acquiring operating parameters of the UHV ground wire de-icing primary system, and determining whether to enter the de-icing control process based on the operating parameters; when the start-up conditions are met, sequentially controlling the power conversion unit and rectifier unit to operate, generating DC heating current; selecting a target ground wire de-icing circuit based on the control loop switching unit, and controlling the output path switching unit to select a target ground wire section; applying DC current to the selected ground wire section through the output unit, and uploading the operating status and electrical parameters to the control system through the information interaction module; and executing shutdown control or switching to another ground wire de-icing circuit if a fault or abnormal parameter is detected during the de-icing process.

[0015] Optionally, if a fault or abnormal parameter is detected during the de-icing process, shutdown control or switching to another ground wire de-icing circuit is executed, including: determining whether there is a usable backup ground wire de-icing circuit; if a backup circuit exists, stopping the operation of the current faulty circuit, driving the circuit switching unit to switch to the backup ground wire de-icing circuit, and restarting the power conversion unit and rectifier unit of the backup circuit; if no backup circuit exists, controlling the output unit to stop outputting, and simultaneously shutting down the current power conversion unit and rectifier unit, entering the shutdown protection state.

[0016] On the other hand, the present invention provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the control method of the above-described ultra-high voltage conductor uninterrupted ground wire de-icing device.

[0017] Through the above technical solution, this invention, via the coordinated configuration of a primary system, a secondary system, and a power supply system, enables stable de-icing operations on ground wires without power interruption on transmission lines. The primary system performs power conversion, rectification, and DC heating output, ensuring a stable application of the de-icing current. The secondary system has control and monitoring functions, dynamically adjusting the operating status of each execution module and synchronizing data with the main station or control system through an information interaction module. The power supply system supports redundant configuration of mains power and backup power, improving overall power supply reliability and preventing de-icing interruptions due to power outages. The overall structure effectively improves the continuity of ground wire de-icing operations and the stability of system operation.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of an ultra-high voltage conductor grounding wire de-icing device provided in one embodiment of the present invention; Figure 2 This is a flowchart of the control method for an ultra-high voltage conductor grounding wire de-icing device provided in one embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures 10 - UHV ground wire de-icing primary system; 101 - Power conversion unit; 102 - Circuit switching unit; 103 - Rectifier unit; 104 - Operation protection unit; 105 - Output path switching unit; 106 - Output unit; 20 - UHV ground wire de-icing secondary system; 201 - Mains control interface unit; 202 - Generator control interface unit; 203 - Power conversion control unit; 204 - Rectifier control unit; 205 - Switching control unit; 206 - Output control unit; 207 - Information interaction module; 30 - UHV ground wire de-icing power supply system; 301 - Grid input unit; 302 - Voltage conversion unit; 303 - Backup power generation unit. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Figure 1 This is a schematic diagram of an ultra-high voltage conductor ground wire de-icing device provided in one embodiment of the present invention. Figure 1 As shown, this invention provides an ultra-high voltage (UHV) conductor ground wire de-icing device that does not require power interruption. The device includes: a primary UHV ground wire de-icing system 10; a secondary UHV ground wire de-icing system 20; and an UHV ground wire de-icing power supply system 30. The primary UHV ground wire de-icing system 10 includes at least one set of ground wire de-icing circuits for converting external power into DC heating current and applying it to both ends of the ground wire. The secondary UHV ground wire de-icing system 20 includes a control module for monitoring and controlling the operating status of each execution module in the primary UHV ground wire de-icing system 10, and an information interaction module for collecting the operating parameters of the primary UHV ground wire de-icing system 10 and uploading them to the main station or control system. The UHV ground wire de-icing power supply system 30 includes at least one mains power supply device and at least one backup power supply device for supplying power to the primary UHV ground wire de-icing system 10 and the secondary UHV ground wire de-icing system 20.

[0023] Preferably, the UHV ground wire de-icing primary system 10 includes multiple ground wire de-icing circuits connected in parallel. Each group of ground wire de-icing circuits is sequentially connected to: a power conversion unit 101 for converting the input voltage and current parameters into AC power suitable for ground wire heating; a rectifier unit 103 for converting the AC power into DC power; an operation protection unit 104 for cutting off the power supply path in case of circuit abnormality; and an output unit 106 for applying DC current to both ends of the ground wire through a cable. The multiple ground wire de-icing circuits are interconnected by a circuit switching unit 102, which is used to switch the load to other normal circuits when one group of ground wire de-icing circuits fails.

[0024] In this embodiment of the invention, the UHV ground wire de-icing primary system 10 is the core execution system for achieving DC heating and de-icing. It includes multiple ground wire de-icing circuits connected in parallel, which can adapt to the ground wire heating requirements of different line sections and different operating conditions. Each group of ground wire de-icing circuits forms a closed loop and has a complete structure, including a power conversion unit 101, a rectifier unit 103, an operation protection unit 104, and an output unit 106 in sequence, which has the characteristics of compact structure and clear division of functions.

[0025] The power conversion unit 101 converts the voltage and current parameters of the connected transmission line into medium-voltage AC parameters suitable for ground wire heating. This module can dynamically adjust the output voltage level and power parameters according to control commands, ensuring the input stability of the rectifier unit 103 and improving the overall energy efficiency conversion ratio. The rectifier unit 103 rectifies the AC power, outputting a continuous and stable DC current, providing a foundation for subsequent DC heating. To adapt to different ground wire lengths, icing thicknesses, and temperature environments, the rectification parameters can be flexibly set, and multiple parallel outputs are supported.

[0026] The operation protection unit 104 is located between the rectifier output and the load to monitor key operating parameters of the grounding de-icing circuit. Once it detects excessive output current, abnormal voltage fluctuations, or excessively rapid temperature rise, it can quickly cut off the power supply to prevent equipment damage or further system malfunctions. This protection mechanism can be linked with the secondary system to achieve both local triggering and remote shutdown modes, providing high safety and reliability.

[0027] Output unit 106 is connected to the ground wire and applies the rectified DC current to both ends of the transmission line ground wire through insulated wires, thereby forming a closed loop in the icing section. The ground wire heats up itself after the current passes through it, causing the ice to gradually fall off. Output unit 106 is designed to support multi-segment wiring and segmented control, and can be combined with a switching device to achieve precise heating of different line sections.

[0028] To enhance system reliability and continuity, multiple grounding de-icing circuits are interconnected via a loop switching unit 102. This switching unit 102 can automatically or manually switch the de-icing task to another healthy circuit when a fault occurs in one circuit or during planned maintenance, ensuring uninterrupted overall de-icing operations. The switching process is monitored in real-time by the control module, which performs the switching action based on priority rules. The loop switching unit 102 has both mechanical interlocking and communication control interfaces, ensuring safety and responsiveness during operation.

[0029] The parallel structure of multiple ground wire de-icing circuits not only increases the overall system capacity limit but also enhances operational redundancy. When load demand increases, multiple circuits can be connected in parallel to work simultaneously; when some circuits are under maintenance or malfunction, the remaining circuits can quickly take over the task, thus forming a flexible, adjustable, and fault-tolerant ground wire heating system.

[0030] Based on the present invention, by constructing multiple fully functional ground wire de-icing circuits with independent output capabilities and interconnecting them through a loop switching unit 102, the UHV ground wire de-icing primary system 10 achieves high-reliability power supply, automatic fault switching, distributed operational redundancy, and high current output capability during the ground wire heating process. Compared with the traditional single-circuit structure, it can more effectively cope with actual working conditions such as system anomalies and power fluctuations, ensuring the continuity, safety, and adaptability of ground wire de-icing operations under uninterrupted power conditions.

[0031] Preferably, the output unit 106 is connected to both ends of the ground wire of the transmission line via insulated cables. The output path is provided with an output path switching unit 105, which is used to select a conduction path among multiple ground wire sections and control the current application range to achieve segmented ground wire de-icing.

[0032] In this embodiment of the invention, the output unit 106 is used to transmit the DC current output by the rectifier unit 103 to the ground wire of the transmission line and complete the final ice-melting heating task. The output end of the output unit 106 is connected to the two ends of the ground wire of the transmission line through insulated cables, so that the DC current can form a closed loop in the target ground wire section, thereby generating a current heating effect in the ground wire, causing the attached ice layer to heat up and fall off. To ensure the safety and reliability of the ice-melting current transmission, the output cable is made of special profile with high insulation level, tensile strength, and cold resistance, and is reasonably pre-buried according to the line span.

[0033] To accommodate transmission line sections of varying lengths and operating conditions, an output path switching unit 105 is further incorporated into the output path. This unit, comprised of a switch control module connected to multiple ground wire sections, is used to switch the conduction path between these sections. Specifically, the output path switching unit 105 can selectively conduct a target section according to instructions from the control module, applying DC current only to the two ends of that ground wire section, thus forming a local closed loop and achieving segmented heating. Unselected sections remain disconnected and do not participate in the current de-icing cycle, preventing energy waste and localized overheating.

[0034] The output path switching unit 105 can perform sequential control according to a preset operating strategy, that is, it can switch to different sections in turn within a certain time interval to complete the segmented heating of multiple ground wires. This switching process can be linked with the fault detection module. If a fault condition such as abnormal contact or sudden resistance change occurs in a certain section, that section can be skipped and the system will automatically enter the next ice melting task. The output path switching unit 105 supports multiple control methods, including timed rotation, load balancing, and manual intervention priority setting, and has strong adaptability and scheduling flexibility.

[0035] In addition, the status information of the output path switching unit 105 is also transmitted back to the control module in the secondary system 20 in real time, and uploaded to the substation system or control center through the information interaction module 207. Maintenance personnel can remotely view the de-icing progress of each ground wire section, the output current distribution, and the equipment response status based on the system report status, thereby improving the visualization and management efficiency of the overall de-icing process.

[0036] Based on the present invention, by setting a controllable output path switching unit 105 in the output path and combining segmented conduction and timing control strategies, segmented de-icing management, rational energy allocation, and controllable output range of the ground wire of long-distance transmission lines are achieved. This structure effectively improves heating efficiency, reduces the risk of local overload, and enhances the system's refined control capabilities and resource utilization efficiency. It is suitable for efficient de-icing operations in complex terrain, long lines, and variable ice conditions.

[0037] Preferably, the UHV ground wire de-icing secondary system 20 includes a control module, which includes: a power conversion control unit 203 for adjusting the working state of the power conversion unit 203 and setting the output voltage parameters, the power conversion control unit 203 establishing a communication connection with the power conversion unit 101; a rectification control unit 204 for controlling the operating mode of the rectifier unit 103 and adjusting the rectification output characteristics, the rectification control unit 204 communicating with the rectifier unit 103; a switching control unit 205 for controlling the conduction state of the circuit switching unit 102 and the output path switching unit 105, the switching control unit 205 communicating with the two switching units respectively; and an output control unit 206 for controlling the start / stop state of the output unit 106 and setting the upper limit of the output current, the output control unit 206 communicating with the output unit 106.

[0038] In this embodiment of the invention, the UHV ground wire de-icing secondary system 20 provides core logic control and operation management functions for the entire de-icing device. Its internal control module is capable of real-time monitoring, parameter adjustment, state switching, and protection actions for each functional unit in the primary system 10. This control module integrates multiple functional units, which work collaboratively to form a closed-loop control system, ensuring the stability, responsiveness, and automation level of the entire de-icing process.

[0039] The power conversion control unit 203 controls the operating status of the power conversion unit 101 in the primary system 10, including start / stop control, output power adjustment, and voltage amplitude setting. This control unit establishes a communication connection with the power conversion unit 101 to acquire real-time operating data of the converter. Based on ground load requirements and overall system power demand, it dynamically adjusts the output voltage parameters to ensure that the AC power input to the rectifier unit 103 is within its optimal operating range. This control mechanism significantly improves system power utilization and power supply stability.

[0040] The rectifier control unit 204 is communicatively connected to the rectifier unit 103 and is used to control its operating mode and rectified output characteristics. The rectifier unit 103 may include various structures, such as bridge rectification and parallel module rectification. The rectifier control unit 204 sets the rectification mode (full-wave, half-wave, periodic control) and adjusts the output voltage and current parameters to ensure that the output DC power meets the heating requirements of different sections of the ground wire. The rectifier control unit 204 also has an anomaly detection function, which can issue a shutdown command and notify the protection system to intervene when the rectifier experiences excessive temperature rise or voltage instability.

[0041] To enable flexible selection of multiple parallel ground wire de-icing circuits and multiple ground wire paths, a switching control unit 205 is included in the control module. This unit establishes communication connections with the loop switching unit 102 and the output path switching unit 105 in the primary system 10. The loop switching control function is mainly used to control the switching device to switch to the backup loop when the main de-icing circuit fails or maintenance is required, ensuring continuous system operation. The output path switching control is used to switch de-icing tasks between different ground wire sections. By controlling the conduction state of the output path, the segmented heating of multiple sections is completed sequentially. The switching control unit 205 has task queue management, timed scheduling, and priority setting functions. It can set a multi-segment rotation strategy in the early stages of system operation to improve system scheduling efficiency.

[0042] The output control unit 206 directly controls the output unit 106 in the primary system 10. Its core functions are to control the output on / off state and set the maximum output current parameter to prevent local overheating of the ground wire or device overload caused by abnormal current. The control unit 206 has real-time current monitoring capabilities, which can quickly identify the load type at the initial stage of system startup and automatically match the upper limit of the output current. It also has a fault response mechanism, which can promptly stop the operation and exit in scenarios such as abnormal ground wire connection or output abnormality, ensuring overall operational safety.

[0043] Through the coordinated operation of the aforementioned multiple control units, the entire control module can achieve comprehensive control and dynamic management of the core execution components in the primary system 10, playing a crucial role in central scheduling and risk protection during the ground wire de-icing process.

[0044] Preferably, the information interaction module 207 in the UHV ground wire de-icing secondary system 20 includes: a multi-channel data interface unit for collecting status signals and operating parameters from the power conversion control unit 203, rectifier control unit 204, switching control unit 205, and output control unit 206 respectively; a protocol adaptation unit for converting the format of the collected data and generating data packets that support standard protocols; a data processing unit for real-time caching, anomaly preprocessing, and verification marking of the collected data; and a communication security unit for implementing data integrity verification and link anomaly alarms. The information interaction module 207 supports bidirectional communication with the substation or control system.

[0045] In this embodiment of the invention, the information interaction module 207 serves as the data acquisition and information uploading hub in the device, undertaking the transmission, processing, and remote communication functions of key operating parameters. Its structure includes multiple functional units, which respectively complete tasks such as data interface, protocol adaptation, cache preprocessing, anomaly detection, and link protection, ensuring efficient information acquisition, stable transmission, and secure interaction throughout the entire ground wire de-icing process.

[0046] The multi-channel data interface unit connects the information interaction module 207 with various functional units within the control module, including the power conversion control unit 203, rectifier control unit 204, switching control unit 205, and output control unit 206. This interface unit supports multi-channel parallel data access and employs a differential signal acquisition mechanism. It can classify, receive, and format the status signals, voltage and current parameters, and load change data returned by each module, providing an efficient data source for subsequent processing. Simultaneously, this unit has a filtering function, which can shield against short-term pulse interference and occasional data spikes, improving the stability and accuracy of the data source.

[0047] The UHV ground wire de-icing secondary system 20 also includes a mains power control interface unit 201 and a generator control interface unit 202. The mains power control interface unit 201 establishes a connection with the main power supply system from the grid. It has real-time detection capabilities for parameters such as mains input voltage, current, and frequency, and supports monitoring and reporting of mains power supply status. When the mains power supply is normal, the system defaults to using mains power as the primary energy input path. When abnormal fluctuations or power outages are detected, the mains power control interface unit 201 can send an alarm signal to the control module through the secondary system, triggering the switching logic of the backup power generation path.

[0048] The generator control interface unit 202 is used to establish a communication control connection with the standby power generation system 303, including sending generator start / stop commands, providing real-time feedback on operating status, recording operating time, and monitoring and uploading operating parameters such as fuel, voltage, and current. This unit has remote start / stop functionality, enabling it to quickly start the generator and complete the power switching process after the control module issues a standby power supply request, ensuring uninterrupted system operation even in the event of a main power failure.

[0049] Through the coordinated operation of the mains power control interface unit 201 and the generator control interface unit 202, the system realizes real-time monitoring and intelligent scheduling of the main and backup power paths, effectively improving the power supply adaptability and operational reliability of the entire UHV ground wire de-icing device in complex power environments, and providing a solid power guarantee for the ground wire de-icing process.

[0050] The protocol adaptation unit is used to encapsulate the collected raw data at the communication protocol level. Since different power system backends may use communication protocols such as IEC 61850, Modbus, and DL / T645, this unit can automatically identify the target system protocol type and convert the collected data into standard format data packets, achieving seamless integration with substations or control systems. This adaptation function supports a dynamic protocol switching mechanism, automatically adjusting the communication protocol according to changes in the network environment or equipment upgrades, ensuring system compatibility during long-term operation.

[0051] The data processing unit is located at the core of the interface acquisition and upload process, responsible for real-time data caching, classification management, anomaly preprocessing, and verification. When the amount of acquired data is large or the communication channel is temporarily blocked, this unit can cache the data stream for a certain period of time to prevent information loss. Simultaneously, the built-in preprocessing algorithm can set thresholds for key parameters. Once a value deviating from the normal range is detected, such as a sudden voltage surge, current drop, or switching failure, it can be marked as "suspected anomaly" and a status identifier code can be added for priority handling by the backend system.

[0052] The communication security unit is used to ensure the integrity and security of data during transmission. It consists of two parts: a data verification module and a link alarm module. The former can perform cyclic redundancy check (CRC) or hash fingerprint verification on the uploaded data to prevent data from being tampered with or accidentally damaged during transmission; the latter monitors the link connection status in real time and immediately issues a link anomaly alarm when events such as communication interruption, abnormal delay, or data packet errors occur, and feeds back the status to the control module or the host system.

[0053] The entire information interaction module 207 establishes a two-way communication channel with the substation's backend system or control platform via a bus or Ethernet interface, enabling real-time uploading of operational data and rapid response to remote commands. This module can not only upload key electrical parameters and system status information during the ground wire de-icing process, but also receive control commands from the control center, enabling remote start / stop control, parameter adjustment, and task scheduling.

[0054] Preferably, the UHV ground wire de-icing power system 30 includes: a grid input unit 301 for receiving external AC power; a voltage conversion unit 302 electrically connected to the grid input unit 301 for converting high-voltage input into low-voltage output adapted to the control system; a standby power generation unit 303 electrically connected to the voltage conversion unit 302 for providing backup power when the grid power supply is abnormal; a power switching unit disposed between the grid input unit 301 and the standby power generation unit 303 for automatic switching between primary and backup power; and the output terminal of the voltage conversion unit 302 is connected to the UHV ground wire de-icing primary system 10 and the UHV ground wire de-icing secondary system 20 respectively via power supply lines.

[0055] In this embodiment of the invention, the ultra-high voltage ground wire de-icing power supply system 30 is the core support system of the entire device, responsible for providing continuous, stable, and adaptable power to the ground wire de-icing circuit in the primary system 10 and the control module and information interaction module 207 in the secondary system 20. The power supply system 30 has a clear structure and closed-loop operation logic, comprising multiple core components such as a grid input unit 301, a voltage conversion unit 302, a backup power generation unit 303, and a power switching unit. It also possesses automatic switching between primary and backup power supplies and multi-path power supply capabilities, adapting to different operating conditions and sudden abnormal scenarios.

[0056] The power grid input unit 301 is used to receive AC power from the external power grid and is the default main power supply path for this device. This input unit 301 is typically connected to the power supply bus of a substation or power distribution system via a switch cabinet or feeder interface, and is equipped with a voltage monitoring module and surge suppression device. It can dynamically identify input voltage fluctuations and has short-time overvoltage protection capabilities to ensure the safety and stability of the power input.

[0057] The voltage conversion unit 302 is located between the power grid input and the downstream equipment, and is used to convert the received high-voltage AC power into a low-voltage output suitable for the control system and execution circuits. According to system design requirements, this unit 302 can output multiple voltage levels, such as providing DC 24V / 48V to the secondary system 20 and 380V AC or DC bus voltage to the primary system 10. The voltage conversion unit 302 adopts an isolated multi-winding structure, has multi-channel output capability, and supports overload protection and over-temperature shutdown functions, ensuring that the entire system maintains stable power supply under various load fluctuations.

[0058] The backup power generation unit 303 serves as an emergency power supply configuration in case of main power failure. It is electrically connected to the voltage conversion unit 302 and automatically switches to this power generation path when the grid cannot provide power. The power generation unit 303 can be in the form of a diesel generator set, a gas-fired emergency power station, or an energy storage inverter, and possesses rapid start-up and self-diagnostic capabilities. To enhance its adaptability to field deployment, the power generation unit 303 supports remote start-up and shutdown control and features functions such as fuel monitoring, temperature control protection, and operating time recording, ensuring reliable start-up capabilities even under extreme conditions such as low temperatures and prolonged shutdowns.

[0059] The power switching unit is the core component of primary and backup power dispatching. Located between the grid input unit 301 and the backup generator unit 303, its main function is to automatically switch from the primary power source to the backup power source when an abnormal grid input is detected (such as undervoltage, frequency drift, or complete power outage). The switching process has a short response time, accurate operation, and can implement "no-backflow" logic to avoid equipment restarts caused by returning to an unstable primary source after switching. The power switching unit also has a manual forced switching function, suitable for manual intervention in special operation and maintenance scenarios.

[0060] The output of voltage conversion unit 302 is connected to the primary system 10 and the secondary system 20 of UHV ground wire de-icing via power supply lines. Each line is equipped with overcurrent protection, leakage detection, and electrical isolation mechanisms to ensure power supply safety. The system supports a multi-circuit independent power supply layout. If a single branch experiences a short circuit or damage, other circuits can still operate normally, further improving power supply redundancy.

[0061] Preferably, the primary system 10, secondary system 20, and power supply system 30 of the UHV ground wire de-icing system are all integrated and encapsulated in a structural housing with dustproof, waterproof, and corrosion-resistant functions; the UHV conductor uninterrupted ground wire de-icing device is set within a preset range of the transmission line tower and is connected to the ground wire endpoint and the power supply access point respectively through insulated cables.

[0062] In this embodiment of the invention, the primary system 10, secondary system 20, and power system 30 of the ultra-high voltage ground wire de-icing system adopt a unified integrated packaging design, and are installed as a whole in an integrated structural housing with dustproof, waterproof, and corrosion-resistant functions. This housing is made of industrial-grade composite materials or stainless steel plates, possessing excellent sealing performance and structural strength. The surface of the housing is coated with an anti-corrosion coating, enabling long-term stable operation in harsh natural environments such as high humidity, strong winds and sandstorms, and acid rain. Simultaneously, a partitioned mounting rack is provided inside the housing to separate and arrange different functional system modules, preventing electromagnetic interference and heat accumulation, and improving the stability and safety of system operation.

[0063] The ultra-high voltage (UHV) transmission line ground wire de-icing device is installed within a pre-defined area on the transmission line tower, typically on an equipment base a certain distance from the tower foundation, to ensure the shortest path connection with the ground wire endpoints and the power system. The device connects to both ends of the ground wire and the power input node via insulated cables. These cables possess tensile strength, cold resistance, and flame retardancy, making them suitable for extreme climates such as mountainous areas, deserts, and high altitudes. To prevent damage from wild animals or external forces, protective fences or video monitoring terminals can be installed around the device.

[0064] This integrated installation method enables the device to be deployed quickly, maintained easily, and highly adaptable. It is especially suitable for standardized deployment along newly built transmission lines, facilitating large-scale mass application.

[0065] Figure 1 This is a flowchart illustrating the control method for an ultra-high voltage conductor uninterrupted ground wire de-icing device according to one embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a control method for an ultra-high voltage conductor ground wire de-icing device, the method comprising: Step S10: The control module of the UHV ground wire de-icing secondary system collects the operating parameters of the UHV ground wire de-icing primary system and determines whether to enter the de-icing control process based on the operating parameters.

[0066] Specifically, the control module of the UHV ground wire de-icing secondary system collects the operating parameters of the UHV ground wire de-icing primary system and determines whether to enter the de-icing control process based on these parameters. In this step, the control module monitors the operating status of key modules such as the power conversion unit, rectifier unit, and output unit in real time, including indicators such as temperature, current, and voltage. When the ice thickness exceeds a preset value, or the ground wire temperature is within the de-icing initiation temperature range, the system triggers the de-icing process initiation logic, providing a data basis for subsequent control command issuance.

[0067] Step S20: When the start-up conditions are met, the power conversion unit and the rectifier unit are put into operation in sequence to generate DC heating current.

[0068] Specifically, when the startup conditions are met, the power conversion unit and the rectifier unit are sequentially activated to generate DC heating current. The control module first issues a startup command to the power conversion unit, configures parameters such as output voltage and current, and monitors whether the output of the conversion unit meets the rectification input requirements. Subsequently, the rectifier unit is started to efficiently convert AC energy into continuous DC current, providing a stable power supply for the ground wire heating process. This process is strictly executed according to the electrical coordination sequence to avoid power surges and load imbalances.

[0069] Step S30: Select the target ground wire de-icing circuit based on the control loop switching unit, and control the output path switching unit to select the target ground wire segment.

[0070] Specifically, the control loop switching unit selects the target grounding de-icing circuit, and the control output path switching unit selects the target grounding segment. In this step, the switching control unit issues instructions to connect a specific grounding de-icing circuit based on the icing state of the grounding segment and the task priority. Loop switching ensures a stable closed power path, while output path switching precisely locates the target segment, achieving accurate control of the de-icing area and preventing energy dispersion or accidental contact with other grounding areas.

[0071] Step S40: Apply DC current to the selected ground wire section through the output unit, and upload the operating status and electrical parameters to the control system through the information interaction module.

[0072] Specifically, the output unit applies DC current to the selected ground wire section, and the information interaction module uploads the operating status and electrical parameters to the control system. The output control unit controls the output unit to conduct within the set current limit, thereby heating the ground wire. During the process, the information interaction module collects information such as current load parameters, voltage and current values, and temperature rise trends in real time, and transmits this information back to the substation backend or control platform via standard communication protocols to achieve process monitoring and dynamic scheduling.

[0073] Step S50: If a fault or abnormal parameter is detected during the de-icing process, execute shutdown control or switch to another grounded de-icing circuit.

[0074] Specifically, if a fault or abnormal parameter is detected during the de-icing process, a shutdown control will be implemented or the system will switch to another grounded de-icing circuit. This fault handling mechanism involves the control module analyzing feedback information from each node in the system in real time, including overcurrent, overvoltage, grounding anomalies, and communication interruptions. If the operating conditions no longer meet the safety threshold, the system will immediately stop the corresponding output path, or the switching control unit will guide the task to switch to a backup grounded circuit to ensure the continuity of the de-icing process and the safety of the equipment.

[0075] Preferably, if a fault or abnormal parameter is detected during the de-icing process, shutdown control or switching to another ground wire de-icing circuit is executed, including: determining whether there is a usable backup ground wire de-icing circuit; if a backup circuit exists, stopping the operation of the current faulty circuit, driving the circuit switching unit to switch to the backup ground wire de-icing circuit, and restarting the power conversion unit and rectifier unit of the backup circuit; if no backup circuit exists, controlling the output unit to stop outputting, and simultaneously shutting down the current power conversion unit and rectifier unit, entering a shutdown protection state.

[0076] In one possible implementation, this embodiment proposes an adaptive de-icing timing strategy based on nighttime off-peak load windows. This method fully utilizes the fluctuation patterns of the power grid load, prioritizing high-current de-icing operations during nighttime off-peak load periods (e.g., 0:00–5:00) to mitigate the impact on power grid dispatching and improve de-icing efficiency and system stability. Specific steps include: after receiving a signal that the ice thickness meets the start-up conditions, the control module first assesses the load level for the current period. If it determines that it is an off-peak period, it automatically enters "enhanced mode," increasing the output voltage setting of the power conversion unit and simultaneously raising the upper limit of the rectifier output current. In this mode, higher power density can be achieved in each heating cycle, accelerating the ground wire thermal effect response speed, thereby shortening the time required for a single de-icing segment.

[0077] Furthermore, this method introduces a "temperature rise curve feedback comparison" mechanism, continuously monitoring the ground wire temperature rise rate and comparing it with historical parameter curves during the de-icing process. If the expected effect is not achieved during off-peak load periods, the control logic can extend the de-icing duration of the current section or increase the number of de-icing cycles to avoid energy waste. When the system enters the daytime peak load period, the control module automatically switches to "steady-state energy-saving mode," reducing the output power and using a "rotation + intermittent" approach to process the remaining ground wire sections, ensuring no interference with the main grid load curve. Through this strategy, the de-icing process not only integrates into the grid operation rhythm but also improves the overall energy efficiency ratio and operational safety margin, making it particularly suitable for load-sensitive areas or line scenarios with high control precision requirements.

[0078] The present invention also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the control method of the above-described ultra-high voltage conductor uninterrupted ground wire de-icing device.

[0079] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0080] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details described above. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe the various possible combinations.

[0081] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the embodiments of the present invention, they should also be regarded as the content disclosed by the embodiments of the present invention.

Claims

1. A device for de-icing the ground wire of an ultra-high voltage power transmission line without interrupting power supply, characterized in that, The device includes: UHV ground wire de-icing primary system, UHV ground wire de-icing secondary system, and UHV ground wire de-icing power supply system; The ultra-high voltage ground wire de-icing primary system includes at least one set of ground wire de-icing circuits for converting external power into DC heating current and applying it to both ends of the ground wire; The UHV ground wire de-icing secondary system includes a control module for monitoring and controlling the operating status of each execution module in the UHV ground wire de-icing primary system, and an information interaction module for collecting the operating parameters of the UHV ground wire de-icing primary system and uploading them to the main station or control system. The ultra-high voltage ground wire de-icing power supply system includes at least one mains power supply device and at least one backup power supply device, used to supply power to the ultra-high voltage ground wire de-icing primary system and the ultra-high voltage ground wire de-icing secondary system.

2. The apparatus according to claim 1, characterized in that, The ultra-high voltage ground wire de-icing primary system includes multiple ground wire de-icing circuits connected in parallel, and each group of ground wire de-icing circuits is sequentially connected to: A power conversion unit used to convert the input voltage and current parameters into AC power suitable for ground wire heating operation; A rectifier unit for converting the alternating current into direct current; Operational protection unit used to cut off the power supply path in case of circuit abnormality; An output unit used to apply direct current to both ends of the ground wire through a cable; The multiple ground wire de-icing circuits are interconnected by a loop switching unit, which is used to switch the load to other normal circuits when one of the ground wire de-icing circuits fails.

3. The apparatus according to claim 1, characterized in that, The output unit is connected to both ends of the ground wire of the transmission line via insulated cables. The output path is equipped with an output path switching unit, which is used to select the conduction path between multiple ground wire sections and control the current application range to achieve segmented ground wire de-icing.

4. The apparatus according to claim 3, characterized in that, The ultra-high voltage ground wire de-icing secondary system includes a control module, which includes: An energy conversion control unit is used to adjust the working state of the energy conversion unit and set the output voltage parameters. The energy conversion control unit establishes a communication connection with the energy conversion unit. A rectification control unit is used to control the operating mode of the rectification unit and adjust the rectification output characteristics. The rectification control unit is communicatively connected to the rectification unit. A switching control unit is used to control the conduction state of the loop switching unit and the output path switching unit, and the switching control unit is communicatively connected to the two switching units respectively. An output control unit is used to control the start / stop state of the output unit and set the upper limit of the output current. The output control unit is communicatively connected to the output unit.

5. The apparatus according to claim 3, characterized in that, The information interaction module in the UHV ground wire de-icing secondary system includes: A multi-channel data interface unit is used to collect status signals and operating parameters from the power conversion control unit, rectifier control unit, switching control unit, and output control unit, respectively. The protocol adaptation unit is used to convert the format of the collected data and generate data packets that support standard protocols. The data processing unit is used for real-time caching, anomaly preprocessing, and verification marking of the collected data; The communication security unit is used to implement data integrity verification and link anomaly alarm; The information interaction module supports two-way communication with substations or control systems.

6. The apparatus according to claim 3, characterized in that, The ultra-high voltage ground wire de-icing power supply system includes: A power grid input unit for receiving external AC power; A voltage conversion unit electrically connected to the power grid input unit is used to convert the high voltage input into a low voltage output adapted to the control system. A backup power generation unit electrically connected to the voltage conversion unit is used to provide backup power when the power grid supply is abnormal; The power switching unit, located between the grid input unit and the standby power generation unit, is used for automatic switching between the main and standby power supplies. The output of the voltage conversion unit is connected to the primary system for de-icing the UHV ground wire and the secondary system for de-icing the UHV ground wire via power supply lines.

7. The apparatus according to claim 3, characterized in that, The primary system, secondary system and power supply system of the ultra-high voltage ground wire de-icing system are all integrated and encapsulated in a structural shell with dustproof, waterproof and corrosion-resistant functions; The ultra-high voltage conductor uninterrupted ground wire de-icing device is installed within a predetermined range of the transmission line tower and is connected to the ground wire endpoint and the power supply access point respectively via insulated cables.

8. A control method for an ultra-high voltage conductor ground wire de-icing device, characterized in that, The method is applied to the ultra-high voltage conductor uninterrupted ground wire de-icing device according to any one of claims 1-7, and the method includes: The control module of the UHV ground wire de-icing secondary system collects the operating parameters of the UHV ground wire de-icing primary system and determines whether to enter the de-icing control process based on the operating parameters. When the startup conditions are met, the power conversion unit and the rectifier unit are sequentially put into operation to generate DC heating current. The target ground wire de-icing circuit is selected based on the control loop switching unit, and the target ground wire segment is selected based on the control output path switching unit. The DC current is applied to the selected ground wire section through the output unit, and the operating status and electrical parameters are uploaded to the control system by the information interaction module. If a fault or abnormal parameter is detected during the de-icing process, a shutdown control will be implemented or the circuit will be switched to another grounded de-icing circuit.

9. The method according to claim 8, characterized in that, If a fault or abnormal parameter is detected during the de-icing process, a shutdown control will be implemented or the circuit will be switched to another grounded de-icing circuit, including: Determine if a usable backup ground wire de-icing circuit exists; If a backup circuit exists, the operation of the current faulty circuit is stopped, the drive circuit switching unit is switched to the backup ground wire de-icing circuit, and the power conversion unit and rectifier unit of the backup circuit are restarted. If there is no backup circuit, the control output unit stops outputting and simultaneously shuts down the current power conversion unit and rectifier unit, entering a shutdown protection state.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the control method for the ultra-high voltage conductor uninterrupted ground wire de-icing device as described in any one of claims 8 and 9.

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