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

A high-frequency office and high-frequency technology, applied in the field of high-frequency office online system monitoring GIS, can solve the problems of difficult maintenance, large area affected by power outages, and long repair time, and achieve the effect of ensuring normal operation.

Active Publication Date: 2012-07-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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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

Method used

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Embodiment Construction

[0007] The method for monitoring GIS by the high-frequency localization on-line system comprises the following steps; 1) the high-frequency localization on-line monitoring system uses the UHF method to independently detect multiple GIS monitoring points at the same time; 2) the high-frequency localization on-line monitoring The system lists the layout diagram of the identification and distribution of PD probes, which is convenient for users to read information; 3) The high-frequency PD on-line monitoring system is equipped with a filtering device, and each probe has an independent filtering device to distinguish PD signals from internal and external Interference signal; 4) The high-frequency partial discharge online monitoring system has real-time data display function, which can directly display the signal detected by the probe; 5) The expert system of the high-frequency partial discharge online monitoring system can realize automatic qualitative judgment of UHF signals, And d...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 倪镭姚明王怡风房岭锋马骏陈平杨明钱纲
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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