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Thermal Field Calculation and Influencing Parameters Analysis of Gas Insulated Busbars |
Li Ling1, Wu Xiaowen1, Li Hongtao1, Pei Yiqiao2 |
1. Wuhan University Wuhan 430072 China 2. Huazhong University of Science and Technology Wuhan 430074 China |
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Abstract Investigation about the heat dissipation ability is important in the design and thermal state detection of gas insulated busbars (GIB). Finite element models of eddy current field, fluid field and thermal field of isolated phase and three phase in one tank type GIB were established respectively. As heat source, joule’s loss calculated in eddy current filed analysis was indirectly coupled with fluid field and thermal field. The fluid density, conductivity and dynamic viscosity were considered as functions of the temperature calculated in the convective and radiation heat transfer process. Giving the corresponding heat transfer boundary conditions, temperature distributions of GIB with different structures were achieved. The accuracy of the results is verified by the comparison with measured values. Based on the proposed model, effects of ambient temperature, gas pressure and load current on the thermal field distribution of GIB are investigated. The results are useful for the design and operation state detection of GIB.
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Received: 15 September 2011
Published: 20 March 2014
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