NDLI: A new partial discharge detecting system on generators

Content Provider	IEEE Xplore Digital Library
Author	YangChun Cheng ChengRong Li Wei Wang
Copyright Year	2005
Description	Author affiliation: Key Lab of HV-EMC, North China Electr. Power Univ., Beijing, China (YangChun Cheng; ChengRong Li; Wei Wang)
Abstract	Online detecting PD of the stator insulation of generators is a good way to find some primary defects. But there are many kinds of pulse noises must be eliminated. Different places and sensors are used to get PD signal and remove noises at the best. In this paper, a new partial discharge detecting system for stator insulation of generators is put forward. It consists of three unconnected sensors, a filter, a data acquired system and a computer. The sensors are placed near but not connect with the three high voltage buses of the generator respectively. PD signal is measured by the sensors and processed by computer, including pulse noises elimination. According to the polarity of the signals from the electric coupler and magnetic coupler in one sensor, noises coming from other devices of power system can be banished. Other kind of noises, such as pulses from exciter, rotator brush, earth and space, are found have certain characteristics at the outputs of the three sensors. These characteristics are used to eliminate the noises. Experiments on a small generator and a section of insolated phase bus ware carried out to demonstrate the above theory.
Sponsorship	IEEJ Tech. Comm. on Dielectrics and Electr. Insulation IEEE Dielectrics and Electr. Insulation Soc
Starting Page	510
Ending Page	513
File Size	690791
Page Count	4
File Format	PDF
ISBN	488686063X
DOI	10.1109/ISEIM.2005.193601
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-05
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	IEEJ Industry Applications Society
Subject Keyword	Partial discharges Magnetic sensors Magnetic noise Pulse power systems Stators Insulation Sensor systems Pulse measurements Couplings Sensor phenomena and characterization
Content Type	Text
Resource Type	Article

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