An integrated intelligent monitoring device for 27.5kV electrified railway
Patent Information
- Application Number
- CN202522138659.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0002]目前我国已成为世界高速铁路第一大国，高速铁路里程日益增加，,因此，高速铁路牵引供电系统的安全，可靠，经济运行对高速铁路运输极其重要，国内已建和在建的高速铁路，其牵引供电系统采用27.5kV牵引供电方式，可靠性高，并具有较强的负载能力，随着27.5kV高压电缆及附件在高铁的大量使用，27.5kV高压电缆及附件已成为高铁牵引供电系统的重要组成部分，从近年来27.5kV高压电缆在各条高铁线路的使用情况来看，高压电缆在设计,施工,运营维护过程中存在的隐患在后期运行过程中不断暴露出来，降低了客运专线及高铁线路的供电安全可靠性，给高铁运行带来隐患
[0006]本实用新型提供的用于27.5kV电气化铁路的集成式智能监测装置实现了集信号采集、数据处理、智能分析及远程监控于一体的电缆智能监测，用于电气化铁路27.5kV电缆接地环流以及局放的监测和故障预警高效、安全、可靠，保障了铁路供电安全。
Smart Images
Figure CN224922016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety monitoring technology for electrified railway power systems, and in particular to an integrated intelligent monitoring device for 27.5kV electrified railways. Background Technology
[0002] Currently, my country has become the world's largest country in high-speed rail, with its high-speed rail mileage increasing daily. Therefore, the safe, reliable, and economical operation of the high-speed rail traction power supply system is extremely important for high-speed rail transportation. The high-speed rail systems already built and under construction in China use 27.5kV traction power supply, which is highly reliable and has strong load capacity. With the extensive use of 27.5kV high-voltage cables and accessories in high-speed rail, they have become an important component of the high-speed rail traction power supply system. However, judging from the usage of 27.5kV high-voltage cables on various high-speed rail lines in recent years, hidden dangers in the design, construction, operation, and maintenance of high-voltage cables have been continuously exposed during later operation, reducing the power supply safety and reliability of passenger dedicated lines and high-speed rail lines, and posing potential risks to high-speed rail operation.
[0003] As an important carrier of energy and information transmission, the safety and stability of cables directly affect the normal operation of the entire railway system. Traditional cable monitoring methods have problems such as limited monitoring range, poor data real-time performance, and inaccurate fault location, which make it difficult to meet the needs of modern operation and maintenance management. Therefore, it is of great significance to develop an efficient, intelligent, and integrated cable monitoring device. Summary of the Invention
[0004] The purpose of this invention is to provide an integrated intelligent monitoring device for 27.5kV electrified railways, which is used to monitor the operating status of 27.5kV high-voltage cables in real time. Through multiple sensors and intelligent algorithms, it realizes online monitoring, automatic diagnosis and fault early warning of high-voltage cables, effectively improving the safety and reliability of railway traction power supply systems.
[0005] The technical solution proposed in this utility model is implemented as follows: An integrated intelligent monitoring device for 27.5kV electrified railways consists of a housing, a control unit, a sensor module, and a power module. The housing is cylindrical, comprising two semi-cylindrical structures, one end of which is rotatably connected by a hinge, and the other end is fastened by screws. During use, the housing is fixed to the outside of the transmission line. The housing houses the sensor module, control unit, and power module. The sensor module includes a grounding current sensor for detecting the grounding current of the cable sheath and a partial discharge sensor for monitoring partial discharge phenomena inside the cable. The inner diameter of the grounding current sensor matches the outer diameter of the grounding cable, supporting closed or open clamp installation. The partial discharge sensor has a detection frequency band between 500MHz and 1500MHz, is embedded in the housing, and is connected to the housing by screws. It is circular, divided into upper and lower parts, and fits tightly against the housing. The control unit includes a microprocessor, a data storage chip, and a communication device. The microprocessor's input / output interface is connected to the sensor; its data bus and address bus are connected to the data storage chip's data bus and address bus; the microprocessor's input / output interface is connected to the communication interface of the communication device; and the microprocessor's power interface is connected to the power output terminal of the power module. The communication device supports LoRa / 4G / 5G technology standards and is installed by being embedded in the housing and connected to the housing with screws, fitting tightly against the housing. The power module includes a solar-powered electronics module, a battery-powered electronics module, and a CT sensor-powered electronics module. These three sub-modules are connected to the control unit via a switch. A flexible photovoltaic panel covers the top of the housing, and high-transmittance glass is installed on the outside of the flexible photovoltaic panel.
[0006] The integrated intelligent monitoring device for 27.5kV electrified railways provided by this utility model realizes intelligent cable monitoring that integrates signal acquisition, data processing, intelligent analysis and remote monitoring. It is efficient, safe and reliable for monitoring and fault early warning of grounding circulating current and partial discharge of 27.5kV cables in electrified railways, ensuring the safety of railway power supply. Attached Figure Description
[0007] Figure 1 Internal structure diagram of integrated intelligent cable monitoring device Figure 2 Block diagram of the control unit for integrated intelligent cable monitoring device Figure 3 External view of integrated intelligent cable monitoring device Detailed Implementation
[0008] The technical solution and advantages of this utility model will be further described below with reference to the accompanying drawings and embodiments. For example... Figure 1 As shown, an integrated intelligent cable monitoring device for 27.5kV electrified railways includes a housing, a control unit, a sensor module, and a power supply module.
[0009] During installation and use, the housing is a cylindrical structure fixed to the outside of the power transmission line. The upper and lower semi-cylindrical structures are connected on one side by a hinge and on the other side by screws. The top of the housing is covered with a flexible photovoltaic panel to power the equipment. There is an interface for debugging the equipment at the bottom. It has a built-in control unit, sensor module, and power module.
[0010] The sensor module includes a grounding current sensor and a partial discharge sensor. The grounding current sensor detects the grounding current of the cable sheath. As an example, the grounding current sensor model is SE-HLCT-01, with a measurement range of 0.1 to 300A, a measurement accuracy of 0.5 class, a resolution of 0.1A, an installation method of closed or open clamp type, an inner diameter that matches the outer diameter of the grounding cable, an operating temperature of -25℃ to +70℃, an operating environment humidity of 0 to 100% or water immersion, and a shell material of flame retardant, corrosion resistant, and non-magnetic.
[0011] Partial discharge sensor is used to monitor partial discharge phenomena inside cables: Model: DY-KJF-380, detection frequency band: 500MHz~1500MHz (ultra-high frequency), sampling period: 3s, monitoring content: partial discharge amount, number of discharges.
[0012] The control unit includes a microprocessor, a data storage chip, and communication devices. The microprocessor is an STM32, a 32-bit microcontroller (MCU) based on the ARM Cortex-M core. It is widely used in embedded system development, and its high performance, low power consumption, rich peripherals, and robust ecosystem make it a mainstream choice in the embedded field. The chip incorporates intelligent algorithms and expert systems for integrated cable intelligent monitoring of 27.5kV electrified railways, enabling online monitoring, automatic diagnosis, and fault early warning of high-voltage cables. Each pin of the chip can be set to an input mode to read and process signals from sensors. The data storage unit uses the W9825GKH-6 synchronous dynamic random access memory (SDRAM) chip, with both the address bus and data bus connected to the microcontroller chip to store data for system operation; The communication device is responsible for receiving and transmitting data. As an example, a communication device supporting LoRa technology, model E95-DTU(400SL30-485), is used and connected to the housing via screws. This device also supports communication devices using 4G / 5G technology standards.
[0013] The power module converts the energy obtained from the photovoltaic panel and the power supply CT, and controls the charging and discharging of the battery to ensure a normal and continuous power supply for the entire device.
Claims
1. An integrated intelligent monitoring device for 27.5kV electrified railways, characterized in that: It consists of a housing, a control unit, a sensor module, and a power module. The housing is cylindrical in shape and includes two semi-cylindrical structures, one end of which is connected by a hinge, and the other end is fastened by screws. When in use, the housing is fixed to the outside of the power transmission line. The housing contains the sensor module, control unit, and power module.
2. The integrated intelligent monitoring device for 27.5kV electrified railways according to claim 1, characterized in that: The sensor module includes a grounding circulating current sensor for detecting the grounding current of the cable sheath and a partial discharge sensor for monitoring partial discharge phenomena inside the cable. The inner diameter of the grounding circulating current sensor matches the outer diameter of the grounding cable and supports closed or open clamp installation. The detection frequency band of the partial discharge sensor is between 500MHz and 1500MHz. It is embedded in the housing and connected to the housing with screws. It is circular and divided into upper and lower parts, which fit tightly with the housing.
3. The integrated intelligent monitoring device for 27.5kV electrified railways according to claim 1, characterized in that: The control unit includes a microprocessor, a data storage chip, and a communication device. The input / output interface of the microprocessor is connected to the sensor, the data bus and address bus of the microprocessor are connected to the data bus and address bus of the data storage chip, the input / output interface of the microprocessor is connected to the communication interface of the communication device, and the power supply interface of the microprocessor is connected to the power supply output terminal of the power module.
4. The integrated intelligent monitoring device for 27.5kV electrified railways according to claim 3, characterized in that: The communication device supports LoRa / 4G / 5G technology standards. Installation method: It is embedded in the housing and connected to the housing with screws, fitting tightly to the housing.
5. The integrated intelligent monitoring device for 27.5kV electrified railways according to claim 1, characterized in that: The power supply module includes a solar power supply module, a battery power supply module, and a CT sensor power supply module. The three sub-modules are connected to the control unit via a switch.
6. The integrated intelligent monitoring device for 27.5kV electrified railways according to claim 1, characterized in that: The shell is covered with flexible photovoltaic panels, and high-transmittance glass is installed on the outside of the flexible photovoltaic panels.