摘要
为深入研究雾霾环境下绝缘子的表面积污规律,分析了雾霾的空气质量指数（AQI）、雾水电导率、相对湿度这3个环境指标对U70BL型绝缘子表面积污特性的影响。通过统计平顶山市一座污秽试验站内U70BL型绝缘子在2014-12-10—2015-02-28期间的积污数据及同期的AQI指数日值,得出当AQI数值在50～100、100～200、200～500内时,试验绝缘子表面的盐密日平均增长量分别为-2.92×10-4、3.7×10-4、8.6×10-4 mg/cm;随着AQI指数的升高,盐密日增长量整体呈增加趋势。此外分析了实验室条件下相对湿度、雾水电导率对U70BL型绝缘子积污特性的影响,可得：相对湿度一定时,表面盐密随着雾水电导率的升高而增加;利用最小二乘法得到雾水电导率（x）与测量盐密（y）间的拟合关系式为y=1.771 5×10-6x＋0.0112;雾水电导率为1 000μS/cm或2 500μS/cm时,湿度作用下污秽颗粒的湿沉降作用显著;且湿度越大,绝缘子表面盐密的增量越大;实验环境下,绝缘子积污9 h后表面的盐密增长量级始终在10-3 mg/cm2。
We investigated the influences of environmental indicators of fog-haze（such as the air quality index, relative humidity, and fog conductivity） on insulator（U70 BL） pollution performances. We analyzed the data based on the daily pollution degree insulator U70 BL in Henan Province in 2014.12.10～2015.2.28. The average daily growths of equivalent salt deposit density（ESDD） of the test insulator are-2.92×10-4 and 3.7×10-4 mg/cm2, 8.6×10-4 mg/cm2 respectively, when the AQIs are 50～100, 100～200 and 200～500. ESDDs daily growth will increase with AQI in a logistic curve pattern. Meanwhile, corresponding experiments were carried on in the laboratory. When the relative humidity is constant, ESDD increases as the fog conductivity increases linearly, and the least squares method is used to obtain the fitting relationship y=1.771 5×10-6 x＋0.0112 between the electrical fog conductivity（x） and the ESDD（y）. When the fog conductivity is 1 000 μS/cm or 2 500 μS/cm, the wet deposition effect of the dirty particles is obvious; and the greater the humidity is, the greater the ESDD increment of the insulator surface will be. Under the experimental environment, the magnitude of ESDD increment of the insulator surface after 9 hours is always 10-3 mg/cm2.
作者
刘泽辉
王璨
李黎
李哲
卢明
段晓红
LIU Zehui;WANG Can;LI Li;LI Zhe;LU Ming;DUAN Xiaohong(Electric Power Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450052,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science ＆ Technology,Wuhan 430074,China;Wuhan Data-cloud Information Technology Limited Company,Wuhan 430074,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第9期2815-2821,共7页
High Voltage Engineering
基金
国家电网公司科技项目(GY71-17-009)~~
关键词
积污特性
雾霾
AQI指数
雾水电导率
相对湿度
insulator contamination
fog-haze
air quality index
fog conductivity
relative humidity
