摘要
架空绝缘导线的绝缘状态对电网线路的安全运行具有重要影响。将等温松弛电流法引入到架空绝缘导线老化特性的评估中,通过建立等比架空绝缘线模型,模拟架空绝缘线在不同天气的运行状况,并在每种天气条件运行模拟后进行等温松弛电流的测试,最后根据测试所得的松弛电流计算不同绝缘部位的老化因子。结果表明,等温松弛电流法可以定性分析运行过程中架空绝缘导线绝缘特性的变化以及定量分析绝缘的劣化程度,从而实现对架空绝缘导线老化状态的快速评估。
The insulation state of overhead insulated lines has great significance to operation security of power grid.In this paper,isothermal relaxation current(IRC)theory is introduced into aging characteristic assessment of overhead insulated lines.By undistorted model establishment,the operating status of overhead insulated lines under different weather conditions is simulated;afterwards isothermal relaxation current test is conducted,according to which the aging factors of insulated parts are calculated.The result shows that the method can be employed for qualitative analysis on insulated characteristic change of overhead insulated lines and quantitative analysis on insulation deterioration degree to rapidly evaluate aging state of overhead insulated lines.
作者
顾金
钱忠
沈阳
吴建东
尹毅
GU Jin;QIAN Zhong;SHEN Yang;WU Jiandong;YIN Yi(Jiading Power Supply Company,SMEPC,Shanghai 201800,China;School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《浙江电力》
2018年第2期1-5,共5页
Zhejiang Electric Power
关键词
架空绝缘线
等温松弛电流
等比模型
老化因子
老化状况评估
insulated overhead lines
isothermal relaxation current
undistorted model
aging factor
aging status assessment