CAJ | 학술논문

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。
오섬사고장기위협착아국전력계통적안전은정운행，경과다년방오치리공작급치리규정적완선，중국적오섬사고대대감소，단관우오섬궤리적분석연구공작잉수계속개전。인공오예시험시분석연구절연자외절연성능적중요방식지일，단인공오예시험여자연오예시험지간등개성적문제병몰유득도타선해결。목전상용적분석방법시이등치염밀작위절연자오예정도평개표준，용재청세오예용액중산생상동전도솔적NaCl염량표시오층가전리물질적도전성。사실상，해방법병몰유완전해결량자등개성적문제。수선제출일투평고인공오예여자연오예시험결과등개성적수학방법，병이용본방법재불동오예도도량표준체계하분석인공오예시험여자연오예시험결과적등개성。분석결론표명，이절연자정체전도솔작위형량삼수시，자연오예절연자적외절연성능여인공오예절연자외절연성능지간적등개성교호。
The pollution flashover has been threatening to the security and stability of the power grid operation in our country. After years of efforts in anti-pollution governance and perfection of relating regulations, the pollution flashover accidents have been greatly reduced. But the mechanisms of pollution flashover still need further research. Artificial contamination test is one effective method to study and analyze the outer insulation performance of the insulators. However, the equivalence problem between artificial pollution tests and natural contamination test still has not been properly addressed. One widely-used analytical method is to use equivalent salt deposit density (ESDD) as the evaluation criteria of the contamination degree on insulator surface. ESDD use the amount of NaCl, which can produce the same conductivity in an equal amount of water with the contamination washed from insulator surface, to represent the conductivity of ionizable substance in contamination layer. In fact, this does not completely solve the equivalence problem between the two different contamination tests. In this paper, a new method was proposed to evaluate the equivalence between naturally contaminated insulators and artificially contaminated insulators. And it was used to analyze the equivalence problem in different evaluation system for contamination severity. The paper showed that the equivalence between natural and artificial contamination test was better solved when using surface conductivity as the evaluation criteria for contamination severity.