复合杆塔连接点表面干带形成机理及不均匀污层电热特性研究  

Formation Mechanism of Dry Band at the Connection Points of Composite Insulating Material Tower and the Electrothermal Characteristics of Uneven Contaminated Layer

作　　者：郝金鹏 伍弘 杨凯 黄金柱 丁培 何潇[3] 吴强[3] 顾小龙 王羽[3] HAO Jinpeng;WU Hong;YANG Kai;HUANG Jinzhu;DING Pei;HE Xiao;WU Qiang;GU Xiaolong;WANG Yu(State Grid Ningxia Electric Power Research Institute,Yinchuan 750011,China;Power Grid Guyuan Electric Power Supply Company,Guyuan 756000 China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,银川750011 [2]国网宁夏电力有限公司固原供电公司,宁夏固原756000 [3]武汉大学电气与自动化学院,武汉430072

出　　处：《电瓷避雷器》2024年第6期99-110,137,共13页Insulators and Surge Arresters

基　　金：宁夏自然科学基金项目(编号:2021AAC03510);国网宁夏电力有限公司科技项目(编号:5229GY220002)。

摘　　要：为补充完善复合材料杆塔连接点处附着悬浮金属染污绝缘表面干带形成机理和非均匀污层电导率下的电热特性,本研究搭建了多参量观测平台,通过人工污秽试验获得染污绝缘表面运行电压下由干带产生到干带贯穿污层全过程下的可见光图像、红外温度图像及泄漏电流结果。此外基于试验结果建立了以温度矩阵差值为目标函数的离散化非均匀污层电导率优化计算方法,并仿真了几种典型干带状态下的表面电流密度和温度分布特性,得到的仿真温度分布的平均偏差在5℃左右,基本满足对于干带形成过程的分析需要。In order to supplement the mechanism of dry band formation at the connection points of contaminated insulation adhered with metals and the electrothermal characteristics under non-uniform contaminated layer conductivity,a multiparameter observation platform was built to obtain visible light images,infrared images and leakage current results of dry band development under the operating voltage on the surface of contaminated insulation through artificial pollution tests.In addition,based on the experimental results,a calculation method to optimize the discrete non-uniform contaminated layer conductivity was proposed,which selected the temperature matrix difference as the objective function.The surface current density and temperature distribution characteristics of several typical dry band states were simulated,and the average deviation of the simulated temperature distribution compared with the experiment result is about 5℃,which basically meets the analysis needs for the dry band formation process.

关 键 词：干带形成机理 污层电导率 红外测温 优化算法 

分 类 号：TM75[电气工程—电力系统及自动化]