以在役的1 000 kV ZF6-1100型特高压GIS母线壳体为研究对象,对其进行了温度与变形的现场测试,获得母线壳体在夏季典型日照作用下温度和壳体位移变化规律.数据分析结果表明:壳体的温度与变形受日照影响较大,壳体各位置温度随日照强度升高而升高,壳体顶部温度最高,增速最快,午后随日照强度减弱温度降低快,之后各点温度趋于与气温一致.在气温温差10℃的夏季,壳体最高温度波动达21℃.壳体受温度影响发生热胀冷缩变形,轴向变形量达0.973 mm.由于壳体各部分温度分布和变化不均匀,引起壳体非均匀变形,壳体法兰转角达0.01°.壳体温度和变形以24 h为周期变化,在设计、制造与检测中应特别关注这种周期性环境载荷可能引起的疲劳累积损伤及失效.%Attention was paid to the serving ultra high voltage of 1 000 kV ZF6-1100 GIS shell.The temperature and deformation were measured on the working condition.The change rule of the temperature and the deformation was gained under the solar radiation during a summer sunny day.Based on the analysis of the testing data,the result was reached that great effect of solar radiation had been discovered on the temperature and the deformation of the GIS shell The temperature of the shell increased with the increasing of the solar radiation strength.The highest temperature located at the top of the shell with the highest increasing rate.During afternoon,the temperature of the shell decreased fast with the decreasing solar radiation strength.Then all testing point temperature trended to be the same as the air temperature and change along it.On the testing day,the air temperature difference was 10 ℃,however,the maximum temperature difference at the top of the shell reached 21 ℃.Because of the temperature change of the shell,deformation emerged result from expand with heat and contract with cold.The deformation range of the shell along axial direction reached 0.973 mm throughout the whole day.The local temperature and its change at the shell were different,which induced the heterogeneous deformation in the shell.Bend deformation was observed,on the flange section at the end of the shell,the deviation angle of 0.01° was measured.It was revealed that the temperature and deformation changed periodically,and their frequency are both once a day.Those periodical environmental loads are important factors of fatigue cumulative damage and failure,which is worth paying close attention in design,manufacture and maintenance of the GIS shell.
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