Article

An Integrated Decision-Making Model for Condition Assessment of Power Transformers Using Fuzzy Approach and Evidential Reasoning

Ruijin LiaoState Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, ChinaHanbo ZhengState Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, ChinaS. GrzybowskiHigh Voltage Laboratory, Department of Electrical and Computer Engineering, Mississippi State University, MS, USALijun YangState Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, ChinaYiyi ZhangState Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, ChinaYuxiang Liao

2011en

ABI

Abstract

This paper presents an integrated model based upon the fuzzy approach and evidential reasoning decision-making approach to condition assessment of power transformers. An assessing index system, including the DGA data, electrical testing, and oil testing, is established to facilitate the assessing model. The model is composed of two levels, that is, the fuzzy model and evidential reasoning model. The fuzzy model is proposed for generating the original basic probability assignments for the second-level model. Afterwards, an evidential reasoning decision-making model is utilized to combine all of the evidence and give an overall evaluation conclusion. Based upon this integrated model, a decision-making procedure is put forward to serve as an effective tool for transformer condition assessments. The results show that the assessing model is capable of offering an overall evaluation of the observed transformer condition.

Identifiers

DOI: 10.1109/tpwrd.2010.2096482

Citations and references

Cited by 20 references

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