GIS partial discharging detection system and method

Abstract

The invention discloses a GIS partial discharging detection system which comprises a partial discharging ultrasonic subsystem and a partial discharging ultrahigh frequency subsystem. The partial discharging ultrasonic subsystem and the partial discharging ultrahigh frequency subsystem are connected with a computer. Further disclosed is a detection method. The detection method comprises the steps of (1) detecting a detected GIS, uploading the detection results to the computer, (2) allowing the computer to carry out data processing and identification on the results detected through the ultrasonic detection method, giving evidences according to the detection results to assign a function value to an elementary probability of a target, namely the assigned probability, (3) calculating evidence space of each GIS fault, and (4) confirming diagnosis results, namely diagnosis types according to diagnosis decisions. According to the GIS partial discharging detection system and method, the partial discharging faults of the GIS can be accurately found, accuracy for identifying the fault types can be improved, maintenance of the GIS is promoted to be developed from periodic maintenance and accident maintenance to state maintenance and reliability maintenance, and detection accuracy is improved.

Description

Technical field [0001] The invention relates to a detection system and method, in particular to a GIS partial discharge detection system and method. Background technique [0002] Gas Insulated Substation (GIS) has been widely used in power systems due to its compact structure, small footprint, unaffected by the external environment, high operational reliability, and long overhaul period. The system occupies an increasingly important position. [0003] At present, the main methods for partial discharge detection of GIS at home and abroad are electric pulse detection method, ultrasonic detection method, light measurement method, chemical detection method, ultra-high frequency method, etc. Among them, the ultrasonic detection method and the ultra-high frequency method are highly sensitive, easy to realize live detection, and can be used for pattern recognition and quantitative analysis. The application prospects are promising. [0004] The sound signal excited by partial discharge in ...

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Problems solved by technology

[0007] At present, the above two methods are used for GIS partial discharge live detection. The disadvantage of the UHF method is that there are no corresponding international and domestic standards at present, and it cannot give a result of the magnitude of the discharge; because the UHF sensor can only be installed in the GIS. Potty insulators, so accurate positioning cannot

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