绝缘介质损失因素在线监测  

Online Monitoring for Insulation Dielectric Loss Factor

作　　者：李光泽[1] 刘明光[1] 徐新社[2] 路延安[2] 

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]兰州铁路局,甘肃兰州733000

出　　处：《中国铁道科学》2005年第2期110-112,共3页China Railway Science

基　　金：兰州铁路局科技基金资助项目(2001 255)

摘　　要：针对牵引变电所高压电气设备的绝缘监测,分析现有预防性试验方法的不足。依据绝缘介质损失因素的物理和数学模型,测量基准电压和泄漏电流的相位差,计算出绝缘介质损失因素,提出一种便于工程实施的在线监测方法。采用分步测试,从理论上可以完全消除环境电磁干扰对在线监测的影响。实际运行情况表明,该方法易行,测量准确。The shortcomings of the present preventive tests for power equipment are analyzed in the area of the insulation monitoring of electric apparatus with high voltage in traction substation. Based on the math-physical model of dielectric loss factor, a method for online monitoring of dielectric loss factor is presented. Dielectric loss is calculated through measuring the phase difference between the base voltage and leakage current, which is easy to be put into practice in project. Theoretically this method can avoid electromagnetic environment interference in online monitoring with step-by-step detecting. According to practice, this method is practicable and accurate.

关 键 词：牵引变电所 电气设备 绝缘介质 损失因素 在线监测 

分 类 号：U224[交通运输工程—道路与铁道工程]