GIS温度场分布特性及影响因素的有限元仿真研究
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摘要
气体绝缘开关(GIS)装置在运行过程中,电流流过高压导体时会导致设备发热,进而影响设备的可靠运行。综合考虑了涡流损耗、集肤效应、邻近效应、SF_6气体对流传热等因素,对GIS温度场的分布特性进行仿真研究,得出GIS隔离开关、导杆、盆式绝缘子等部件的温度分布规律,分析了材料、外部气体温度、风速和太阳辐射等4种因素对GIS温度分布的影响规律。结果表明:在GIS的横截面上,温度由内到外逐渐降低;从散热的角度考虑,铜芯铝壳是GIS的最佳结构形式;外界空气温度对GIS温升的影响不明显;风速增大会导致GIS的温升降低;太阳辐射能有效提升GIS的温升效果。
During the operation process of gas insulated substation(GIS), the device will generate heat when the current flow through the high voltage conductor, which would affect the reliable operation of equipment. In this paper, the temperature field distribution characteristics of GIS was simulated considering the influencing factors such as eddy current loss, skin effect, proximity effect, and SF_6 air convection transmit heat, and the temperature distribution of isolating switch, conductive rod, and basin insulator in GIS were obtained. The effects of material, external gas temperature, wind speed, and solar radiation on the temperature distribution of GIS were analyzed. The results show that the temperature decreases gradually from inside to outside on the cross section of GIS. From the point of heat dissipation, copper core and aluminum shell is the best structure form of GIS. The effect of external air temperature on the temperature rise of GIS is not obvious. With the increase of wind speed, the temperature rise of GIS decreases. Under solar radiation, the temperature rise of GIS increases effectively.
During the operation process of gas insulated substation(GIS), the device will generate heat when the current flow through the high voltage conductor, which would affect the reliable operation of equipment. In this paper, the temperature field distribution characteristics of GIS was simulated considering the influencing factors such as eddy current loss, skin effect, proximity effect, and SF_6 air convection transmit heat, and the temperature distribution of isolating switch, conductive rod, and basin insulator in GIS were obtained. The effects of material, external gas temperature, wind speed, and solar radiation on the temperature distribution of GIS were analyzed. The results show that the temperature decreases gradually from inside to outside on the cross section of GIS. From the point of heat dissipation, copper core and aluminum shell is the best structure form of GIS. The effect of external air temperature on the temperature rise of GIS is not obvious. With the increase of wind speed, the temperature rise of GIS decreases. Under solar radiation, the temperature rise of GIS increases effectively.
引文
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[2]徐敏,牛凯,刘慧俊.基于有限元分析的GIS母线筒温度场分布研究[J].华东电力,2013,41(9):1920-1925.
[3]康添慧.高压GIS多物理耦合场分析及温度监测系统的研发[D].长沙:湖南大学,2014.
[4]张森林. GIS接触电阻与温升关系研究[D].北京:华北电力大学,2015.
[5]赵雪辰,陈强.基于有限元分析的单相GIS隔离开关温度场仿真研究[J].通信电源技术,2015,32(5):227-228,230.
[6]杨世铭,陶文铨.传热学[M].第四版.北京:高等教育出版社,2006.
[7]范镇南,张德威,陈显坡,等. GIS母线损耗发热状态的电磁场与流场计算分析[J].中国电机工程学报,2009,29(S1):241-244.
[8]金虎,彭在兴,王颂,等. 252kV三相共箱GIS母线壳体温度场分布特性研究[J].高压电器,2017,53(12):20-25.
[9]曾亮.基于有限元的252kV GIS母线电场和温度场的仿真与优化[D].厦门:厦门理工学院,2016.
[10]胡慧慧,李凡,李立群.环氧树脂基导热绝缘复合材料的研究进展[J].绝缘材料,2011,44(5):27-30.
[11]杜伯学,孔晓晓,李进,等.高导热环氧树脂复合电介质研究现状[J].绝缘材料,2017,50(8):1-8.
[12]陈强,李庆民,丛浩熹,等.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[J].电工技术学报,2016,31(17):187-195.