Research on the method of installing built-in UHF partial discharge sensors in tank circuit breakers
In order to improve the insulation status monitoring level of tank circuit breakers and ensure the reliable operation of equipment,a method for installing built-in ultra-high frequency partial discharge sensors on site was proposed.Firstly,the on-site installation of the built-in ultra-high frequency partial discharge sensor was achieved through the selection of installation position,sensor selection,sealing structure design,electric field simulation calculation,and installation environment control.Secondly,the sealing performance of the installation position was checked through sealing tests.Finally,the installation effect of the sensor was verified through true type testing.The results show that after the installation of ultra-high frequency sensors,the maximum field strength of the inner hand hole surface and coupling electrode of the tank circuit breaker is 12.45 kV/mm,and the maximum field strength of the shielding cover is 18.51 kV/mm,both of which are lower than the design allowable values.Quantitative leak detection of SF6 gas volume fraction of eight after five hours of sealing structure wrapping 8 μL/L,less than the standard requirement value of 15 μL/L.The sensitivity of the sensor meets the detection needs and has a certain inhibitory effect on external interference signals.After installing a built-in ultra-high frequency partial discharge sensor,the insulation performance,sealing performance,and detection sensitivity of the tank type circuit breaker meet the design requirements.The research results provide a practical and efficient method for on-site detection of ultra-high frequency partial discharge.
spectral analysisbuilt intank type circuit breakerpartial dischargeultra-high frequencysealing structure
万方数据
维普
