An Operating Procedure for the Detection, Identification, and Location of Partial Discharge in Cast-resin Dry-type Transformers
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 this paper, we used a waveguide and a specially designed AE-sensor pair to overcome the shortcomings of the AE method.Test results indicate that the two techniques used not only greatly improve the sensitivity but also increase the reliability of the AE measurement system.In a practical case using the proposed techniques, the winding with PD was found in a high-voltage transformer, and further analysis was carried out to restrict the scope of PD to two points which are bilaterally symmetrical about the waveguide.An operating procedure for detection, identification and localization of PD is developed based upon the techniques described.
Chien-Yi Chen Ching-Chau Su Jia-Bin Wang Cheng-Chi Tai Jiann-Fuh Chen Shih-Shong Yen
Department of Electrical Engineering,National Cheng Kung University,1 University Road,Tainan City 70 Department of Electrical Engineering,Nan Jeon Institute of Technolog,178 Chaoqin Road,Yanshui Dist.,
国际会议
成都
英文
1-5
2011-11-01（万方平台首次上网日期，不代表论文的发表时间）