【摘要】 针对开关柜局部放电产生的暂态对地电压(TEV)信号设计了一种局部放电传感器。该传感器由容性耦合、滤波、放大和降频等功能模块组成,具有噪声低、灵敏度高和动态范围宽等优点。测试表明:该传感器能可靠地采集开关柜局部放电产生的暂态对地电压信号。更多还原

【Abstract】 A partial discharge sensor is designed in switch cabinet which is used to acquire the transient voltage to earth (TEV) generatored in switch cabinet PD. The system function consists of capacitive coupling, filtering, and amplification and down clock. It is with the excellence of low noise, high sensitivity and wide dynamic range, etc. The test shows that the sensor can acquire switch cabinet partial discharge from the transient voltage to earth reliably.更多还原