平衡电阻法监测直流系统绝缘  

MONITORING AND DETECTING OF DC SYSTEM INSULATION BY BALANCE RESISTANCE METHOD

作　　者：苏义鑫[1] 刘林伟[1] 

机构地区：[1]武汉理工大学自动化学院,湖北省武汉市430070

出　　处：《电力系统自动化》2003年第14期65-68,共4页Automation of Electric Power Systems

摘　　要：对现有的直流系统绝缘监测方法特别是综合判据法进行分析 ,指出该方法的不足之处。提出一种新的直流系统绝缘监测方法———平衡电阻法。在理论上论证了通过该方法监测直流系统绝缘时既能降低对系统电压的影响 ,又可以提高绝缘电阻的测量精度 ,并在此基础上给出了用平衡电阻法监测直流系统绝缘的基本原理与步骤。基于该原理的样机在现场运行效果良好。The shortcomings of the present methods for detecting the earth fault in DC system, especially that of the synthesized criteria, are analyzed. This paper proposes a new method based on balance resistance for monitoring and detecting the DC system insulation. It is concluded through theoretical analysis that monitoring and detecting the DC system insulation by using the proposed method can reduce its impact on system voltage and improve the measurement precision of insulated resistance. Principle and realization of the method are also given. The practical operation effect of the prototype based on the principle is good.

关 键 词：绝缘监测 直流系统 平衡电阻 漏电流传感器 

分 类 号：TM764[电气工程—电力系统及自动化]