AMPLIFYING DEVICE USED FOR CAPACITOR PARTIAL DISCHARGE ON-LINE MONITORING SYSTEM

摘要

An amplifying device used for a capacitor partial discharge on-line monitoring system. The capacitor partial discharge on-line monitoring system comprises a current sensor (IV) and a signal collecting device (VIII). The amplifying device comprises a voltage follower unit (I), an amplifying unit (II), and a cable driving unit (III). An input end of the voltage follower unit (I) is connected to the current sensor (IV), an input end of the amplifying unit (II) is connected to the voltage follower unit (I), an output end is connected to the cable driving unit (III), and the cable driving unit (III) is connected to the signal collecting device (VIII). Compared with the prior art, the amplifying device has advantages of eliminating influence of amplifier impedance on sensor impedance, and influence of refraction and reflection on signal transmission.