Insulating gas state detection system for GIS (gas insulated switchgear) equipment

• Main Authors: Cha Jianqing, Cai Weidong, Dai Wenhua, Lin Yangpo, Shen Dongming, Zhou Yan, Chen Ruzhou, Xiao Guanghui
• Format: Patent
• Language: Chinese; English
• Published: 31.08.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides an insulating gas state detection system for GIS (gas insulated switchgear) equipment. Sulfur hexafluoride mixed gas is extracted from the GIS equipment and fed into a sample gas chamber; a sensor for gas feature detection is used for detecting the sulfur hexafluoride mixed gas in the sample gas chamber to obtain a resistance signal corresponding to a gas feature parameter value; after zero drift of the sensor and on-site interference signal influence are eliminated through a bridge-type compensating circuit, a voltage signal corresponding to the resistance value is outputted; a signal analysis and processing module is connected with the bridge-type compensating circuit to obtain the voltage signal for performing analog-digital conversion and signal amplification processing, and is further connected with a temperature sensor and a pressure transmitter to acquire a temperature value and a pressure value of the sample gas chamber, and temperature and/or pressure compensation of the gas fe