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《Proceedings of the Chinese Society of Universities for Electric Power System and its Automation》 2011-06
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Risk Analysis Method for Transmission Line Combining of Various Meteorological Factors

XIONG Xiao-fu1,WANG Wei-jun1,YU Yang2,SHEN Zhi-jian1, CHENG Ren-li2,DAI Zhi-yong2 (1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400030,China; 2.Shenzhen Power Supply Bureau,Guangdong Power Grid Company, Shenzhen 518020,China)  
Failure rate of transmission line and reliability of power system are significantly affected by meteorological factors.In view of the complexity and variability of meteorological factors,this paper presents a failure rate model of transmission line in different meteorological condition with different meteorological grades,and a risk analysis method for transmission line considering multiple meteorological factors based on gray fuzzy theory.This method takes eight meteorological conditions as an evaluation standard,and establishes risk degree evaluation system for transmission line including four evaluation grades.Triangular membership function is built up to describe the fuzzy relation among evaluation factors and risk grades,and the incredible degree of fuzzy relation is described by gray scale value of pixel.Based on the gray fuzzy comprehensive evaluation is conducted,and the evaluation result closer to practice is achieved,providing basis for transmission line risk warning and maintenance strategy.Through the risk analysis in a certain power supply bureau,the effectiveness of the proposed method is validated.
【Fund】: 国家自然科学基金资助项目(50777068);; 重庆大学输配电国家重点实验室资助项目(2007DA10512709202)
【CateGory Index】: TM755
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