基于等温松弛电流法的架空绝缘导线老化状况评估Aging Status Assessment of Overhead Insulated Lines Based on Isothermal Relaxation Current
顾金,钱忠,沈阳,吴建东,尹毅
GU Jin,QIAN Zhong,SHEN Yang,WU Jiandong,YIN Yi
摘要(Abstract)：
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.
关键词(KeyWords)：
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
基金项目(Foundation):
作者(Author):
顾金,钱忠,沈阳,吴建东,尹毅
GU Jin,QIAN Zhong,SHEN Yang,WU Jiandong,YIN Yi
DOI: 10.19585/j.zjdl.201802001
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