新型交直流比较仪在暂态电流测量中的应用  

Transient Current Measurement for Power System by Using Improved AC/DC Current Transformer

作　　者：任士焱[1] 张智杰[1] 刘晓军 

机构地区：[1]华中科技大学电气与电子工程学院 [2]武汉低压电器检测站

出　　处：《华中科技大学学报（自然科学版）》2001年第11期85-87,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 ( 5 98770 0 6)

摘　　要：提出了一种全新的交直流电流比较仪 ,分析了它的暂态响应特性 .这种新型电流比较仪实际上包含了自平衡直流比较仪和电子补偿式交流电流互感器的所有功能 .测试表明传统的暂态电流互感器测量误差达到 5 %～ 10 % ,而用新型交直流比较仪的暂态电流测试误差小于 1% .The transient current measurement by the improved AC/DC comparator is developed. The important design basis for transient current measurement of the current comparator used in the power system are given. The improved AC/DC comparator consists of a self balancing DC comparator and an electronically compensated AC transformer. The transient performance details and calculation formulas of the comparator are analyzed and derived The testing results show that the transient errors of 5?000?A AC/DC transformer are less than l percent while the errors of conventional transient current transformers reach 5～10 percent and even more.

关 键 词：电流测量 暂态电流 交直流比较仪 暂态响应特性 自平衡直流比较仪 电子补偿式交流电流互感器 

分 类 号：TM933.14[电气工程—电力电子与电力传动]