复合绝缘子积污特性的数值模拟研究  

Numerical Simulation of the Contamination Characteristics of Composite Insulators

作　　者：吕玉坤[1] 张雪梅[1] 李金岗 卫少科 吕正蔚 LYU Yukun ZHANG Xuemei LI Jingang WEI Shaoke LYU Zhengwei(North China Electric Power University, Hebei Baoding 071003, China Inner Mongolia Kang Yuan Power Engineering Supervision Co., Ltd., Hohhot 010070, China)

机构地区：[1]华北电力大学,河北保定071003 [2]内蒙古康远工程建设监理有限责任公司,呼和浩特010070

出　　处：《高压电器》2017年第8期73-80,共8页High Voltage Apparatus

摘　　要：为研究棒形悬式复合绝缘子的积污特性,利用COMSOL对其在笔者所在学校风洞条件下的积污特性进行了数值模拟,并将模拟结果与华北电力大学风洞试验结果进行了对比分析。结果表明:两者积污量数量级相同,整体上随直流电压的变化趋势一致且呈"V"形分布,验证了该模拟方法的合理性。藉此,对复合绝缘子自然积污特性进行了模拟研究,分析了污秽质量分数和电压类型对其自然积污特性的影响。结果表明:绝缘子表面积污量随污秽质量分数的增大而增大;污秽质量分数较小时,积污量的增加速度较大,质量分数较大时,反之。在相同条件下,绝缘子表面积污量无论是整体上还是沿各伞裙分布均在施加直流电压时最大,交流电压与无电压情况相似;直流电与无电压情况下各伞裙积污量的差值近似呈"W"形分布。To reveal the contamination characteristics of rod-type suspension composite insulator,COMSOL is employed to simulate the contamination characteristics of the composite insulator in the wind tunnel at North China Electric Power University,and the simulation results are compared with the test ones from the same wind tunnel.It is shown that the simulated quantity of contamination is in same order of magnitude as that of test one and they both display a V-shape changing trend with DC voltage,which confirms the rationality of the simulation method. Further,a simulation study is conducted on the natural contamination characteristics of the insulator to understand the effects of contamination concentration and voltage type on the natural contamination characteristics of insulators.The results show that：l）the quantity of contamination on the insulator surface increases with the contamination concentration;2）the increasing rate of the quantity of contamination has an inverse relationship with the contamination concentration;3）under the same conditions,the quantity of contamination on whole insulator surface or on umbrella skirts gets the maximum under DC voltage, and the distribution of contamination under AC voltage is similar to that without voltage; and 4）the difference of the quantity of contamination,on the umbrella skirts between under DC voltage and without voltage is approximately W-shaped.

关 键 词：复合绝缘子 积污特性 风洞试验 污秽质量分数 电压类型 自然积污 

分 类 号：TM216[一般工业技术—材料科学与工程]