Research and Application of Automatic Fault Diagnosis and Isolation Device for Distribution Line

Junfeng Liu,Shiyang Zheng,Cheng Wang,M.M.H Mostafa,S Manickam,Keyin Jia,Minghongtian Chen

doi:10.1051/e3sconf/202126101015

Junfeng Liu, Shiyang Zheng + Show 5 more

Open Access

https://doi.org/10.1051/e3sconf/202126101015

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Abstract

This paper takes the equipment of a specific project as an example to develop an automatic fault diagnosis and isolation device for 10kV overhead line or cable line when a user has grounding and shortcircuit faults, so as to realize fast fault location, isolation and recovery, reduce the power outage time of users, and thus improve the reliability of distribution network. The project takes the 10kV South and North Trunk Lines ‘hand in hand’ power supply network as the research object, and studies the solutions of the automatic fault isolation function and the restoration of power supply, hoping to further improve the level of rapid power recovery, reduce power loss, and improve the reliability, automation and information level of power supply for reference.

Highlights

Automatic diagnosis and isolation device for distribution fault is a fault isolation device which integrates high voltage vacuum circuit breaker and intelligent controller
The circuit breaker can be combined with an isolating switch and can be equipped with an intelligent controller
Front-end system consists of fault isolation device and fault location device

Summary

Introduction

Automatic diagnosis and isolation device for distribution fault is a fault isolation device which integrates high voltage vacuum circuit breaker and intelligent controller. The device has manual and electric operation functions, uses vacuum arc extinguishing and SF6 gas insulation medium is used. The circuit breaker can be combined with an isolating switch and can be equipped with an intelligent controller. As a power supply device, the selfprovided PT becomes an only circuit breaker, which has the output function of voltage and current signal, and has the characteristics of controllability. The device can operate independently as a complete system, and can be extended compatible with the power automation SCADA system

Principle of automatic line fault diagnosis and isolation device

Integrated system of fault isolation device and fault location device

Background

Automatic fault diagnosis module

Fault isolation module

Application of automatic fault isolation system

Automatic isolation of interphase short circuit faults in user areas

Application of fault location system

Application of background platform system

Application of grounding short circuit technology

Conclusions