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In this paper, a new designed acoustic emission (AE) wideband amplifier and waveguide are used to locate the partial discharge (PD) signal in cast-resin dry-type transformer. When PD events occur in a cast-resin dry-type transformer, it is often accompanied by electromagnetic and ultrasonic signals. The AE method can be used to detect and locate ultrasonic source. However, due to the high sound attenuation...
The detection and location of partial discharge (PD) in cast-resin dry-type transformers using the acoustic emission (AE) method is very difficult: the sound in filled epoxy is highly attenuated and is easily interfered with external sound sources. In addition, there is no operating procedure for the detection, identification and location of PD in cast-resin dry-type transformers up to present. In...
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