Method for monitoring GIS (gas insulated switchgear) by aid of high-frequency partial discharge online system

Abstract

A method for monitoring a GIS (gas insulated switchgear) by the aid of a high-frequency partial discharge online system comprises following steps that 1), the high-frequency partial discharge online system simultaneously independently detects a plurality of GIS monitoring points by the aid of an ultra-high-frequency method; 2), the high-frequency partial discharge online monitoring system shows an arrangement diagram of partial discharge probe marks and distribution; 3), the high-frequency partial discharge online monitoring system is provided with a filtering device; 4) the high-frequency partial discharge online monitoring system has a real-time data display function; 5), an expert system of the high-frequency partial discharge online monitoring system can realize automatic qualitative judgment of an ultra-high-frequency signal, and the type of the ultra-high-frequency signal is displayed on a man-machine interaction interface; 6), the high-frequency partial discharge online monitoring system provides a discharge history records and trend monitoring; 7), the high-frequency partial discharge online monitoring system realizes self checking automatically; and 8), the high-frequency partial discharge online monitoring system realizes remote monitoring. Compared with the prior art, the method for monitoring the GIS by the aid of the high-frequency partial discharge online system timely and effectively detects the GIS by the aid of a series of means, and effectively guarantees normal running of system equipment.

Description

technical field [0001] The invention relates to a method for monitoring GIS, in particular to a method for monitoring GIS by a high-frequency local on-line system. Background technique [0002] With the development of society, the demand for electric power continues to increase, and the requirements for power quality are also getting higher and higher. At the same time, the requirements for safe operation of equipment are also correspondingly increased. GIS (Gas Insulated Switchgear, Gas Insulated Switchgear) is more and more used due to its small size, all components are sealed without environmental interference, convenient installation, high operational reliability, long maintenance cycle, and small maintenance workload. in the power system. With the development of the power system towards ultra-high voltage, high reliability and compactness, GIS has become the main development direction in the future. Due to the limitation of the design and manufacturing level, the insu...

AI Technical Summary

Problems solved by technology

Due to the limitation of design and manufacturing level, the insulation problems of GIS occur from time to time, and there is still a certain gap between GIS and the goal of maintenance-free.

The practical experience in the installation and operation of GIS substations at home and abroad shows that most GIS accidents are caused by insulation defects, such defects mainly include: free metal particles exceeding a certain size in the gas chamber, protrusions on the electrode surface or suspended potential These defects may cause insulation failure during GIS operation, and even cause serious accidents

Due to the relatively difficult maintenance of GIS equipment, once GIS fails, it will take a long time to repair, the area affected by the power outage will be large, and the consequences will be very serious. Therefore, early warning of insulation failures inside GIS is very important