Apparatus for detecting partial discharge signal and method thereof

Abstract

An apparatus for detecting a partial discharge (PD) signal capable of detecting a PD signal of a power device includes: a partial discharge (PD) coupler connected to a ground side of a power device and configured to cancel a low frequency noise component including a commercial frequency from an AC component flowing through the ground side of the power device when a partial PD signal is generated from the power device, and to allow a high frequency component including a PD signal included in the AC component to pass therethrough to generate a PD analog signal; and a PD detection unit configured to cancel a noise signal from the PD analog signal generated by the PD coupler to detect only the PD signal.

Dependencies are inferred from the claim text.