A Two-Dimensional Cloud Model for Condition Assessment of HVDC Converter Transformers

Jian Li, Zhiman He, Youyuan Wang, Jinzhuang Lv and Linjie Zhao
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Jian Li: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400030, China
Zhiman He: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400030, China
Youyuan Wang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Electrical Engineering, Chongqing University, Chongqing 400030, China
Jinzhuang Lv: HVDC Technology Research Department, Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, China
Linjie Zhao: HVDC Technology Research Department, Electric Power Research Institute, China Southern Power Grid, Guangzhou 510623, China

Energies, 2012, vol. 5, issue 1, 1-11

Abstract: Converter transformers are the key and the most important components in high voltage direct current (HVDC) power transmission systems. Statistics show that the failure rate of HVDC converter transformers is approximately twice of that of transformers in AC power systems. This paper presents an approach integrated with a two-dimensional cloud model and an entropy-based weight model to evaluate the condition of HVDC converter transformers. The integrated approach can describe the complexity of HVDC converter transformers and achieve an effective assessment of their condition. Data from electrical testing, DGA, oil testing, and visual inspection were chosen to form the double-level assessment index system. Analysis results show that the integrated approach is capable of providing a relevant and effective assessment which in turn, provides valuable information for the maintenance of HVDC converter transformers.

Keywords: HVDC converter transformer; condition assessment; cloud model; entropy weight (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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