基于工况环境下绝缘子污秽微波辐射特性的研究.pdf

华北电力大学(保定)
硕士学位论文
基于工况环境下绝缘子污秽微波辐射特性的研究
姓名:吕旭东
申请学位级别:硕士
专业:工学;通信与信息系统
指导教师:高强
2011-03
华北电力力大学硕士学位论文
摘要
本文根据微波辐射理论,主要研究了工况况环境下绝绝缘缘子污污秽的微波辐射测量方
法。首先先,分分别别在晴晴朗天气气和云雾气气象条件下,试验研究了 XP-70 型绝绝缘缘子辐射的
天线温度(TA)与等值盐密(ESDD )和灰密(NSDD )的关关系,提提出出了实际工况况环境
下,绝绝缘缘子辐射的天线温度的计算公公式。试验结结果表明明:ESDD 和 NSDD 均对天线
温度有影响,通过对试验数据进行拟合分分析,可以得到到污污秽绝绝缘缘子辐射的天线温度
与等值盐密和灰密之间为幂函函数的关关系,且 ESDD 和 NSDD 对天线温度的影响彼此
独立。采用最小二乘法和 Table 软件对试验结结果拟合分分析,验证了天线温
度计算公公式的准准确性。
对自然积污污绝绝缘缘子进行了自然污污秽试验,根据长期的试验观测数据,分分析了环
境温度、空气气湿度对污污秽绝绝缘缘子微波辐射特性的影响,利利用灰关关联分分析,得到到了环
境温度是是影响天线温度的最大因素。为了重点研究空气气湿度对污污秽绝绝缘缘子微波辐射
特性的影响,根据微波辐射理论和天线传输理论,消除了环境温度和天空温度的影
响,得到到了绝绝缘缘子表面发射率与空气气湿度的对应关关系。结结果表明明:绝绝缘缘子表面发射
率与空气气湿度之间比比天线温度与空气气湿度之间有更明明显显的对应关关系。
最后,为了预测绝绝缘缘子表面污污秽程度,本文提提出出了一种基于 RBF 神经网网络络的绝绝
缘缘子等值盐密和灰密预测模型。结结果表明明:RBF 神经网网络络模型实现了对等值盐密和
灰密的准准确预测。

关键词:绝绝缘缘子污污秽;天线温度;等值盐密;等值灰密;空气气湿度;RBF 神经网网络络



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华北电力力大学硕士学位论文
Abstract
According to microwave radiation theory, in this paper, the microwave radiation
measurement method of insulator contamination was mainly studied under working
condition. The paper researches on the effects of both the equivalent salt deposit density
(ESDD) and non-soluble deposit density (NSDD) on the antenna temperature ( TA) of
contaminated XP-70 insulators under clear sky and cloud whether conditions, the
experience formula of TA is results show that both the ESDD and NSDD
have influence on the TA of the contaminated insulators, and the relationship between TA
and ESDD is the same as that between TA and NSDD by a power function through curve
fitting. Both ESDD and NSDD are mutually independent as for the influence on T A. The
experience formula of TA was verified accurate by the least-squares procedure and Table
program.
Based on the long-term tests results, the effects of both the ambient temperature and
air humility on the microwave radiation characteristic of contaminated insulators were
analyzed. The ambient temperature