基于瓦斯继电器挡板转角特性的油浸式变压器运行状态监测方法

瓦斯继电器是变压器中重要的非电量保护设备,现有瓦斯继电器只有在挡板旋转到一定角度触发干弹簧片才发生重瓦斯报警,并不能判断变压器在发生重瓦斯故障前的运行状态和故障发展过程.文章提出一种基于瓦斯继电器挡板转角的变压器运行状态监测方法.改进瓦斯继电器的部分结构,通过在挡板背面安装霍尔传感器,实现了挡板转角信号的提取.然后研制...

A Method for Monitoring Operation Status of Oil-immersed Transformer Based on the Baffle Angle Characteristic of Gas Relay

A gas relay in the transformer,an important non-electricity protection equipment,only triggers the stem leaf spring for the serious gas alarm when the baffle rotates to a certain angle,which cannot judge the transformer fault in the event of heavy gas before running state and fault development process,this paper puts forward a kind of based on gas relay panel corner of transformer running state monitoring methods.The partial structure of the gas relay is improved,and the baffle corner signal is extracted by installing a Hall sensor on the back of the baffle.On this basis,this paper develops a test stand capable of simulating the baffle characteristics of gas relays at different fault energies.Subsequently,the baffle angle variation law under different fault energies is studied,and the influence of pipe pressure and pipe flow rate on the baffle angle is given.The results show that,based on this improved gas relay,the real-time baffle angle information can reflect the internal operating state of the transformer and provide an effective method for transformer operating condition monitoring.