Defects Classification of Hydro Generators in Indonesia by Phase-Resolved Partial Discharge

Chun-Yao Lee (), Nando Purba and Guang-Lin Zhuo
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Chun-Yao Lee: Department of Electrical Engineering, Chung Yuan Christian University, Taoyuan 320314, Taiwan
Nando Purba: Indonesia Asahan Aluminum Co., Ltd., Pintu Pohan Merant, Toba 22384, Indonesia
Guang-Lin Zhuo: Department of Electrical Engineering, Chung Yuan Christian University, Taoyuan 320314, Taiwan

Mathematics, 2022, vol. 10, issue 19, 1-27

Abstract: This paper proposed a phase-resolved partial discharge (PRPD) shape method to classify types of defect generator units by using offline partial discharge (PD) measurement instruments. In this paper, the experimental measurement was applied to two generators in the Inalum hydropower plant, located in North Sumatera, Indonesia. The recorded PRPD using the instrument MPD600 can illustrate the PRPD patterns of generator defects. The proposed PRPD shape method is used to mark auxiliary lines on the PRPD patterns. Moreover, four types of defects refer to the IEC 60034-27 standard, which are microvoid (S1), delamination tape layer (S2), slot defect (S3), and internal delamination (S4) and are used to classify the defect types of the generators. The results show that the proposed method performs well to classify types of defect generator units.

Keywords: partial discharge (PD); phase-resolved PD (PRPD); rotating machine; stator coil (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
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