自然污秽与人工污秽绝缘子等价性分析方法研究

发布时间：2018-08-03 18:26

【摘要】：污闪事故长期威胁着我国电力系统的安全稳定运行,经过多年防污治理工作及治理规程的完善,中国的污闪事故大大减少,但关于污闪机理的分析研究工作仍需继续开展。人工污秽试验是分析研究绝缘子外绝缘性能的重要方式之一,但人工污秽试验与自然污秽试验之间等价性的问题并没有得到妥善解决。目前常用的分析方法是以等值盐密作为绝缘子污秽程度评价标准,用在清洗污秽溶液中产生相同电导率的NaCl盐量表示污层可电离物质的导电性。事实上,该方法并没有完全解决两者等价性的问题。首先提出一套评估人工污秽与自然污秽试验结果等价性的数学方法,并利用本方法在不同污秽度度量标准体系下分析人工污秽试验与自然污秽试验结果的等价性。分析结论表明,以绝缘子整体电导率作为衡量参数时,自然污秽绝缘子的外绝缘性能与人工污秽绝缘子外绝缘性能之间的等价性较好。
[Abstract]:Pollution flashover accident has threatened the safe and stable operation of power system in China for a long time. After years of anti-pollution treatment work and improvement of treatment rules, the pollution flashover accident in China has been greatly reduced, but the analysis and research on the mechanism of pollution flashover still need to be carried out. Artificial contamination test is one of the important ways to analyze and study the insulation performance of insulator, but the problem of equivalence between artificial pollution test and natural pollution test has not been solved properly. At present, the commonly used analytical method is to use the equivalent salt density as the standard for evaluating the pollution degree of insulators, and to use the amount of NaCl salt which produces the same conductivity in the cleaning polluted solution to express the conductivity of the ionizable substance in the sewage layer. In fact, the method does not completely solve the problem of their equivalence. Firstly, a set of mathematical methods to evaluate the equivalence between artificial and natural pollution test results are proposed, and the equivalence between artificial pollution test and natural pollution test is analyzed by using this method in different pollution degree measurement system. The results show that when the overall conductivity of the insulator is taken as the measuring parameter, the external insulation performance of the natural polluted insulator is better than that of the artificial polluted insulator.
【作者单位】：清华大学深圳研究生院;江苏省电力科学研究院;
【基金】：国家重点基础研究发展计划项目(973项目)(2009CB724503)~~
【分类号】：TM216

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