引入多重边界条件的GIS母线温度分布多场耦合计算及影响因素分析

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Abstract

Computational research on gas insulated substation (GIS) bus bar temperature distribution may present useful references for contacts temperature monitoring as well as loading current regulation.A coupled multi-physics simulation model is established with finite element method.And multiple boundary conditions including solar radiation,wind speed,and ambient temperature are taken into account as to analyze the influence of weather conditions on the temperature distribution.Effectiveness of the proposed multi-physics model with multiple boundary conditions is validated by implementing steady current-loading tests.Based on the established simulation model, the impacts of loading current,ambient temperature,solar radiation and wind speed on the GIS temperature distribution are analyzed,and the simulated results indicate that,the conductor and the tank temperature’s growth rate increase gradually with the load increase;and the temperature changes in an approximately linear fashion with regard to the ambient temperature.The solar radiation significantly increases the temperature level of GIS;and the tank temperature curve remains as sinusoidal distribution with the hottest spot shifting to the direction of solar radiation.The wind may make the tank temperature curve deviate from the sinusoidal type.However,the heat-conducting capability of SF₆turns to be the main limiting factor on the conductor temperature reduction.Finally,an empirical formula is proposed based on the numerical relationship between the conductor temperature,the lowest temperature of tank,the ambient temperature,and the load current.Comparison with experimental results shows high accuracy of the proposed method.

Key words： GIS bus bar temperature distribution finite element analysis coupled fields multiple boundary conditions

Received: 07 June 2015 Published: 18 September 2016

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TM595

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	Articles by authors
	Chen Qiang
	Li Qingmin
	Cong Haoxi
	Li Jinsong
	Jin Hu
	Peng Zaixing

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Chen Qiang,Li Qingmin,Cong Haoxi等. Numerical Calculation and Correlative Factors Analysis on Temperature Distribution of GIS Bus Bar Based on Coupled Multi-Physics Methodology Combined with Multiple Boundary Conditions[J]. Transactions of China Electrotechnical Society, 2016, 31(17): 187-195.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I17/187

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