Precise fault location system for high voltage cables

IN-500 Cable Precise Fault Location System

Precise fault location system for high voltage cables

Precise fault location system for high voltage cablesStructure and working principle

  • cable termination: Located at the ends of high-voltage cables, it is the component that connects the cable to other electrical equipment, and is distributed at the end position of each line.
  • transducersIt consists of a traveling wave sensor and a high-frequency sensor. The traveling wave sensor is used to detect traveling wave signals generated by cable faults, while the high-frequency sensor is used to capture high-frequency signals generated by faults, through which the location of faults can be determined.
  • Mains and earth cables: The main cable is the main channel for transmitting electrical energy; the grounding cable is used for the grounding protection of the cable system to ensure the safe operation of the system.
  • Monitoring equipment: Receive the signals from the sensor, analyze and process the signals, and then realize the precise location of high-voltage cable faults.

Electricity extraction method

  • solar powerSolar panels convert light energy into electricity through the solar photovoltaic effect, providing a green and environmentally friendly source of power for the monitoring system, and are suitable for outdoor environments with sufficient light.
  • Single / Dual CT Pickup: Current transformers (CTs) are capable of sensing electrical energy from the current in high-voltage cables to power monitoring equipment. The single/dual CTs can be flexibly adapted to different cable system configurations and power supply requirements.
The system can efficiently and accurately locate high-voltage cable faults and guarantee the reliable operation of the power system through signal acquisition by sensors, analysis and processing by monitoring equipment, together with diversified power-taking methods.

Device Introduction

High-voltage cable fault location system utilizes the systematic method of high-speed transient traveling wave on-line monitoring and power grid topology analysis to realize the on-line monitoring of power cables and to locate the fault points of power cables. The specific method is to install high-frequency sensors at the double-end direct grounding or cross-interconnection points of high-voltage cables, the cable in the event of a fault in the transient traveling wave signal acquisition to each on-site monitoring device, through the monitoring device to analyze and process the signals uploaded to the system backstage, the system backstage through the wave analysis to automatically calculate the distance to the point of failure through double-end ranging technology, through the system backstage to indicate the location of the point of failure.

Positioning principle

Precise fault location system for high voltage cables

Equipment parameters

traveling wave data Traveling wave bandwidth: 1kHz～20MHz; Sampling rate: ≥100MHz
Device Accuracy Positioning accuracy: ≤L*0.2%+5m (L is the length of the interval cable); timing accuracy: ±10ns;
Installation Wall-mounted fixing; 304*184*77, 4*M22; also can be customized with floor standing cabinet;
protection class Cast aluminum chassis: IP68; floor standing cabinet: IP55;
environmental adaptation Ambient temperature: -40℃～+70℃; Ambient humidity: 0～95% (no condensation);
Operating power CT induction pickup, AC220V utility, solar power pickup, composite fiber optic cable, etc., can be used in combination according to the project situation
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