The safe operation of high-voltage cables is crucial in modern power systems. In order to ensure the reliability and stability of cable lines, a precise fault location system for high-voltage cables has emerged. This article will provide a detailed introduction to the functions and parameters of a high-voltage cable fault precise positioning system produced by Dunheng brand, model DH-ZWGZ100. The system can be applied to the precise positioning and identification of faults in cable lines with voltage levels of 35-500kV.

　　1、 System Overview

The high-voltage cable fault precise positioning system adopts advanced technologies such as 100Mbps high-speed sampling, Beidou high-precision timing, and precise calibration of signal phase error, with a positioning accuracy of less than 5 meters. This system not only has high-precision fault location capabilities, but also achieves automatic and rapid fault identification through artificial intelligence deep learning algorithms, providing great convenience for cable inspection personnel.

　　2、 System architecture

The system consists of a cable monitoring terminal host, a monitoring platform, as well as mobile SMS and web clients. The cable monitoring terminal host is responsible for high-speed collection of cable fault traveling wave signals and fault power frequency signals, and uploading real-time data to the monitoring platform. The monitoring platform uses artificial intelligence deep learning algorithms to diagnose the collected data and output fault diagnosis results. Operations personnel can view relevant information in real-time through mobile SMS and web clients to ensure timely detection and handling of faults.

　　3、 Main functions

　　1. High precision cable fault locationBased on excellent hardware performance and precise calibration technology for application signal phase error, the positioning accuracy of this system is less than 5 meters, which can accurately and quickly locate cable fault points.

　　2. Real time collection of cable fault currentThe system monitors the fault current at the cable installation point in real-time, with a sampling rate of 2KPS. When a fault occurs, it is possible to record the fault current at 10K sampling points, providing detailed data support for fault analysis.

　　3. Real time collection of cable fault traveling wavesThe system monitors the high-frequency traveling current parameters of cable installation points in real-time, with a sampling rate of up to 50/100MSPS. When a fault occurs, it is possible to record the fault current for a duration of 1000us to ensure the capture of the complete fault waveform.

　　4. Intelligent fault recognitionThe fault recognition program using intelligent deep learning algorithms has a recognition rate of over 95% for fault types, and the fault recognition time is less than 5 minutes, greatly improving the efficiency and accuracy of fault handling.

　　5. Beidou/GPS positioning functionThe cable monitoring terminal adopts the Beidou/GPS dual timing system, with a timing accuracy of up to 10ns, effectively ensuring positioning accuracy.

　　6. Remote data communicationThe system adopts 4G wireless communication to achieve remote transmission and communication of local data. Operations personnel can perform parameter configuration, remote upgrades, and other operations on terminals through the cloud platform, improving the flexibility and maintainability of the system.

　　7. Multiple power supply methodsTo adapt to different application scenarios, the cable monitoring host can choose multiple power supply methods such as mains power, solar power, CT power, etc., to meet on-site installation requirements.

　　4、 Technical parameters

performance parameters	performance metrics	performance parameters	performance metrics
precise positioning	≤ 5 meters	High frequency signal bandwidth	≥200k
Positioning reliability rate	≥95%	High frequency signal amplitude	5A~5000A
Fault location time	<1 minute	Sampling rate of hidden current	1M
Fault analysis method	Deep learning algorithms	Hidden danger current signal bandwidth	10~200k
Power frequency sampling rate	2~10K	Potential hazard current amplitude	1mA~1A
Frequency signal bandwidth	≤1khz	time service accuracy	10ns
Traveling wave sampling rate	20~100M	Energy harvesting method	Municipal power/CT/solar energy
Operating Temperature	-40℃~90℃	Operating Humidity	1%~95%

In summary, the high-voltage cable fault precise positioning system produced by Dunheng brand has a wide range of application prospects in the power system due to its high precision, real-time performance, intelligence, and flexibility. This system can not only improve the operational reliability of cable lines, but also provide strong technical support and guarantee for cable inspection personnel.