利用磁制动检测电流互感器饱和的实用化研究  

Research on the Practicality of Current Transformer Saturation Detection Using the Magnetic Restraint Principle

作　　者：黄志元[1] 何奔腾[1] 张雪松[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2006年第4期75-79,共5页Automation of Electric Power Systems

摘　　要：在等效电路的基础上,结合电流互感器二次侧电流的特点,提出了改进型的磁制动检测判据,解决了磁链积分中初始磁通难以确定的问题。EMTP仿真表明:改进的磁制动法能实时检测各种电流互感器饱和,防止由于剩磁影响而引起的误判断,检测精度高,实现容易。An improved criterion using the magnetic restraint principle for detecting current transformer （TA） saturation combined with some characteristics of the second current is proposed for the equivalent circuit of TA, Hence the problem of obtaining the initial remanence is resolved in the core when the flux linkage is calculated using an integral algorithm. Simulation results with EMTP show that the improved criterion can accurately detect nearly all kinds of TA saturation and avoid maloperation due to the remanence. In addition, the method is easy to implement and its validity and stability are satisfactory.

关 键 词：电流互感器 磁制动 饱和检测 三阶差分 

分 类 号：TM452[电气工程—电器]