摘  要:随着生活质量的不断改善，科技的不断发展，环境污染也在不断的增加，导致绝缘子表面被染污的程度增大，污闪带来的风险也增大了，输电线路的可靠性降低，构成了电力系统潜在的威胁。为了改善此种现象，有必要对绝缘子的污秽闪络特性作进一步的研究。

　　　本文研究的试品为XWP2-160瓷绝缘子，采用固体涂层法对试品进行染污，采用升压法对试品进行升压至闪络得到闪络电压，在人工雾室的条件下进行大量的人工污秽试验。采用Excel以及曲线拟合软件1stopt来正确处理试验数据，通过数据分析得到盐密ρESDD和灰密ρNSDD单独作用和共同作用下对闪络电压Uf的影响。确定了盐密的影响指数a，灰密的影响指数b，并且通过盐密/灰密单独影响下的污闪电压Uf与盐密/灰密的关系图来研究了瓷绝缘子的污秽闪络特性。

关键词：瓷绝缘子；等值盐密；灰密；污闪

ABSTRACT:With the continuous improvement of quality of life and the continuous development of science and technology, environmental pollution is constantly increasing, leading to the degree of the insulator surface soiled increases flashover also increases the risks, reduce the reliability of transmission lines, constitute a potential threat.To improve this phenomenon, it is necessary to carry out in-depth study of insulator contamination flashover characteristics.

 The test sample is XWP2-160 porcelain insulators, using solid coating method to contaminate the sample and using boost method to boost the sample to flashover and get flashover voltage ,through the test to select the appropriate test devices, and with the conditions of artificial fog chamber to do a large number of artificial pollution tests.I correctly handled the test data obtained by studying Excel and curve fitting software 1stopt . Using this data, I analysis the impact of salt density ρESDD and ash density ρNSDD individually and collectively on flashover voltage Uf.I get the impact index of salt density “a”and the impact index of ash density “b”, and study the pollution flashover characteristics through the diagram of flashover voltage Uf and salt density / ash density under the independent effects of salt density / ash density.Keywords: Porcelain insulators ,Salt density（ESDD）,Grey density(NSDD),Flashover