TY - GEN
T1 - An operating procedure for the detection, identification, and location of partial discharge in cast-resin dry-type transformers
AU - Chen, Chien Yi
AU - Su, Ching Chau
AU - Wang, Jia Bin
AU - Tai, Cheng Chi
AU - Chen, Jiann Fuh
AU - Yen, Shih Shong
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
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U2 - 10.1109/APL.2011.6110193
DO - 10.1109/APL.2011.6110193
M3 - Conference contribution
AN - SCOPUS:84862921414
SN - 9781457714665
T3 - 2011 7th Asia-Pacific International Conference on Lightning, APL2011
SP - 581
EP - 585
BT - 2011 7th Asia-Pacific International Conference on Lightning, APL2011
T2 - 2011 7th Asia-Pacific International Conference on Lightning, APL2011
Y2 - 1 November 2011 through 4 November 2011
ER -