Study on Self-diagnosis System of SF6 Gas Digital Density Relay
After long-term operation of the built-in pressure sensor of SF6 (sulfur hexafluoride)gas digital density relay,the probability of failure will increase,accompanied by parameter drift caused by aging,which will affect the density mo-nitoring results and may lead to misjudgment of gas chamber leakage.In order to accurately determine the cause of the density change,this paper proposes a digital density relay self-diagnosis technology based on double pressure sensors.The double pressure sensor drift model is obtained through the aging test,and the self-diagnosis system based on the double pressure sensor drift model is studied,which effectively improves the reliability of the digital density relay and completes the accurate determination of the pressure sensor drift.
digital density relaydouble pressure sensoraging driftself-diagnosisreliability
万方数据
维普
