High-voltage circuit breaker external insulation state judgment method based on fundamental wave electric field fluctuation

• Main Authors: SHA JUNFENG, CHEN HAO, YANG JIACHEN, LONG QIFENG, HAN CHENLEI, XIA BING, HAN XIANGZHENG, ZHANG RUOWEI, XU FENG, XU WEILUN
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

According to the fundamental wave electric field fluctuation-based high-voltage circuit breaker external insulation state determination method, electric field intensity measurement sensors and gas sensitive sensors are respectively arranged on A-phase, B-phase and C-phase columns of a high-voltage circuit breaker; the method comprises the following steps: firstly, setting acquisition frequencies of an electric field intensity measurement sensor and a gas-sensitive sensor, collecting acquired data to form a set, then setting a time period for judging an external insulation state, and calculating a three-phase fundamental wave electric field fluctuation ratio of the high-voltage circuit breaker in the time period; finally, the external insulation state of the high-voltage circuit breaker is judged through the three-phase fundamental wave electric field volatility. According to the method, the external insulation state of the high-voltage circuit breaker is judged by adopting special field intensity fundamental