模拟雾霾与自然雾霾下积污等效性分析

Equivalent analysis of contaminations under simulated fog-haze and natural fog-haze

雾霾天气的不确定性使得研究其对电力设备影响的工作较难开展,然而模拟雾霾环境下的研究能否等效于实际雾霾天气下的情况,关系着其结论对实际工作的指导价值。为此,文中在模拟雾霾和自然雾霾环境下分别测试积污样品的表面污层电阻和泄漏电流,分析讨论了2种环境对绝缘子影响的等效性。研究发现,从测试的等值附盐密度、非可溶沉积物密度和表面污层电阻等数据看,2种雾霾环境下的绝缘子具有等效对应关系,即绝缘子自然雾霾下积污1 a等效于模拟雾霾下积污10~20 d;从泄漏电流参数看,2种雾霾环境下的复合绝缘子不具有等效性,模拟雾霾下的泄漏电流结论不能直接用于指导实际工作。

The uncertainty of haze weather makes it difficult to carry out research on its impact on power equipment.However,whether the research under simulated haze environment is equivalent to that under actual haze weather is related to the guiding value of the research conclusion to the actual work.For this reason,in this paper,the samples are contaminated under simulated haze environment and natural haze environment respectively.By testing the surface contamination layer resistance and leakage current of the contaminated samples under the two environments,the equivalence of the effects of the two environments on insulators is analyzed and discussed.It is found that from the measured data of salt density,ash density and surface pollution layer resistance,the insulators under the two haze environments have an equivalent corresponding relationship,that is,the insulators with pollution accumulation under natural haze for one year are equivalent to those with pollution accumulation under simulated haze for 10-20 days.However,from the perspective of leakage current parameters,composite insulators under the two haze environments are not equivalent,so the conclusion of leakage current under the simulated haze cannot be directly used to guide the actual work.