Partial discharge detecting system and method for high voltage switch cabinet

Abstract

The invention discloses a partial discharge detecting system and method for a high voltage switch cabinet, and on-line monitoring is conducted on the intelligent high voltage switch cabinet through an acoustoelectric joint on-line monitoring system based on the information fusion technology by joint adoption of an ultrasonic monitoring method and an ultrahigh frequency monitoring method. According to the partial discharge detecting system and method for the high voltage switch cabinet, the advantages of the ultrasonic monitoring method and the ultrahigh frequency monitoring method are integrated, information fusion of a characteristic layer and a strategy layer is conducted on a discharge signal obtained through the information fusion technology, and fault diagnosis is conducted on the fused discharge information. Insulation faults and discharge situations in the intelligent high voltage switch cabinet are found in time through on-line monitoring, so that safe operation of an intelligent power grid is ensured. The partial discharge detecting system and method for the high voltage switch cabinet solve the problems in the prior art that the ultrasonic detecting range is narrow and is not favorable for analysis of the discharge information, a detecting device cannot display the discharge information on site and is not favorable for overhaul and maintenance of the working personnel, and the detecting device does not have the fault signal mode identifying function and cannot judge the situation that an interference signal causes a false alarm.

Description

technical field [0001] The invention relates to an on-line partial discharge monitoring system and a fault diagnosis method of a high-voltage switchgear, in particular to an acoustic-electric combined on-line monitoring and fault diagnosis of a partial discharge signal of an intelligent high-voltage switchgear. Background technique [0002] With the development of the national economy, the country has higher and higher requirements for the reliability of power system operation. High-voltage switchgear is an important link to ensure the normal operation of the power grid, and is a very important electrical equipment in the power system. According to the relevant data of China Electric Power Research Institute, most of the insulation faults in the State Power Corporation are caused by partial discharge. Therefore, it is of great significance to the safe and stable operation of power equipment to develop a partial discharge online monitoring system for high-voltage power equip...

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Problems solved by technology

The detection range of the ultrasonic detection in the prior art is narrow, which is not conducive to the analysis of discharge information; the detection device cannot display the discharge information on the spot, which is not conducive to the maintenance and maintenance of the staff; the detection device does not have the function of fault signal pattern recognition and cannot judge A series of technical problems such as false alarms caused by interference signals

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