试验程序差异对绝缘子污秽测量结果影响

摘要:

染污绝缘子闪络威胁电网安全可靠运行，长期以来掌握运行中绝缘子积污特性是电力部门重要的工作之一， 相关规程也规定了绝缘子自然积污测试方法，但测试过程差异对测量结果的影响并不清楚。这里采用瓷和复合绝缘 子，模拟不同等级污秽，采用不同测试方法对盐密和灰密进行了测量，并对各种方法的试验结果进行了对比分析，结 果表明: 采用污秽溶解静置 24 h、去离子水用量 300 ml、专用取样布擦拭法、每片绝缘子取样布使用 6 张的方法可使测 量结果更准确。研究结果可为绝缘子自然积污测试技术提供技术参考。

Abstract:

Surface flashover of polluted insulators is threatening the safe and reliable operation of power grid． The research of the contamination deposited characteristic on insulators of transmission line has been the one of the most important works of power grid departments for a long time． Some relevant regulations also provide the natural contamination test methods for insulators． However，the effects of the difference of test procedures on the measurement results have not been discussed yet． Porcelain insulators and composite insulators are adopted as the sample，the different pollution levels are simulated，and the salt deposit density ( SDD) and non － soluble deposit density ( NSDD) are measured using different kinds of test methods． Then the test results of different methods are compared． The research results show that，it is recommended to let the pollution solution stand for 24 hours，use 300 ml deionized water，wrap the pollution by special sampling cloth，and use 6 pieces of clothes for each insulator unit to make sure the accuracy of test data． The proposed research can provide a technical reference for the natural contamination test technology of insulators．