Study of comparison between Ultra-high Frequency (UHF) method and ultrasonic method on PD detection for GIS

[摘要] GIS (gas insulated switchgear), is an important equipment in power system. Partial discharge plays an important role in detecting the insulation performance of GIS. UHF method and ultrasonic method frequently used in partial discharge (PD) detection for GIS. However, few studies have been conducted on comparison of this two methods. From the view point of safety, it is necessary to investigate UHF method and ultrasonic method for partial discharge in GIS. This paper presents study aimed at clarifying the effect of UHF method and ultrasonic method for partial discharge caused by free metal particles in GIS. Partial discharge tests were performed in laboratory simulated environment. Obtained results show the ability of anti-interference of signal detection and the accuracy of fault localization for UHF method and ultrasonic method. A new method based on UHF method and ultrasonic method of PD detection for GIS is proposed in order to greatly enhance the ability of anti-interference of signal detection and the accuracy of detection localization.

[发布机构] Jinan Power-supply Company, Jinan, Shandong; 250012, China^1

[效力级别] 生态环境科学

[关键词] Fault localization;GIS-Gas insulated switchgear;Insulation performance;Partial discharge detection;Partial discharge in GIS;Partial discharge tests;Simulated environment;Ultra high frequency method