摘要
三相共箱式气体绝缘母线的热计算及散热性能研究对于其可靠性设计及在线监测具有重要意义。根据流体力学理论,采用流体多组分有限元法对三相共箱式气体绝缘母线进行热计算,利用映射网格划分实现电磁场、温度场和流体场的间隔耦合,综合考虑了母线外壳内外气体的流动和温度变化特性。采用流体单组分有限元法、流体多组分有限元法、传热学解析公式法三种方法进行计算,并对比分析了计算结果与试验结果的精度。结果表明,多组分有限元法与试验结果最为接近,为气体绝缘母线的设计及在线监测提供了理论基础。
Thermal calculation and research on heat dissipation capability was critical for reliability design and on-line monitoring of three-phase enclosed gas-insulated busbar. According to fluid dynamic theory, multiple species transport model was applied to thermal calculation of three-phase enclosed gas insulated busbar. Eddy current field results were in- directly coupled with fluid and thermal fields by using mesh mapping method. In addition to convection and radiation effects at the fluid-solid interface, the temperature dependent characteristics of fluid parameters were considered. Three methods including single species finite element method, multiple species finite element method and method which com- bined heat balance equation with heat transfer analytical formulas, were used to three-phase enclosed gas-insulated busbar thermal calculation. By comparing the results of thermal calculation and experiment outcomes, the research analyzed advantages and disadvantages of three methods, which provides theoretical basis for three-phase enclosed Gas-insulated busbar design and on-line monitoring.
出处
《水电能源科学》
北大核心
2014年第7期169-172,177,共5页
Water Resources and Power
关键词
气体绝缘母线
热计算
多组分有限元法
单组分有限元法
解析公式法
gas insulated busbar
thermal calculation
multiple species finite element method
single species finite element methods analytic formula method
