摘要
为了提出一种能综合考虑气象、绝缘子几何参数、大气污染物影响的污秽度预测方法,利用计算流体力学的方法对绝缘子的积污特性进行了研究,并对换流站污秽盐分构成进行了分析。研究表明:随风速增加,下表面积污量增加并维持在最大值的80%左右,上表面的积污量先增大后减小;相对湿度增加将使上下表面的积污量均增加,最大值小于同等条件下相对湿度为30%时的5倍。盐分构成分析显示污秽盐分构成具有地区一致性的特点。在利用相关研究成果考虑降雨清洗效应的情况下,结合实例对模型进行了验算,偏差最大的预测值小于实测值的4倍。该新的污秽度预测方法可以为污秽预测的进一步研究提供借鉴。
In order to develop a model to predict the severity of contamination deposition which could take account of the effects of the meteorology, geometric parameters of insulators, and air pollutant,we studied the contamination deposition characteristics of post insulators by means of computanational fluid dynamics. Moreover,we analyzed the chemical composition of salt in pollutant on insulators. The results demonstrate that as the wind speed grows, the contamination on the bottom suface rises and remains about the 80% of the maxmium value, while the contamination on the top sufaces increaces first and then decreases. Moreover, the contamination deposition grows as the relative humidity gets bigger, but it will be less than five times of the value as the relative humidity is 30%. The chemcial composition of the salt contamination on insulators is uniform in the same region. At last, the model is verified with an example, and it is revealed that if the relief effect of rainfall is thought over, the predicted value will be less than four times the samples＇ mesured value at its worst condition. The proposed new method of contamination prediction can be used for a reference for further researches.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第3期876-884,共9页
High Voltage Engineering
基金
国家自然科学基金(51377093)
南方电网重点科技项目(编号略)~~
关键词
绝缘子
污秽预测
计算流体力学
气象
绝缘子几何参数
大气污染物
insulators
contamination prediction
computional fluid dynamics
meteorology
geometric parameters of insulators
air pollutant
