用于直流输电系统保护的di/dt传感器研究  

Research on di/dt sensors used for direct current transmission systems protection

作　　者：徐雁[1] 马坦[1] 朱红桥 彭振东 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]武汉船用电力推进装置研究所,湖北武汉430064

出　　处：《华中科技大学学报（自然科学版）》2015年第2期113-118,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：强电磁工程与新技术国家重点实验室开放基金资助项目(2013KF001)

摘　　要：以直流输电系统的短路保护为研究对象,根据电流变化率保护的要求,基于罗氏线圈原理,设计了电流变化率传感器.给出了电流变化率传感器分布参数模型及集总参数等效模型,讨论了该传感器幅频特性及时域特性.通过理论分析、计算仿真及试验验证了该传感器的可实施性,仿真和试验结果表明:在保证灵敏度大于0.15V/(A·μs-1)的同时,该传感器输出的上升时间可控制在5μs以内,并且能够正确反映故障电流的变化.With protection of direct current transmission system′s short circuit as the research object,current rate sensor was designed according to the requirement of the current changing rate protection based on the principle of Rogowski.The distributed parameter model and lumped parameter model of the current changing rate sensor were analyzed,and the amplitude frequency characteristics and the time domain features of the sensor were discussed.The sensor was available through theoretical analysis,the computing simulation and test.Experiment results indicate that the rise time of the sensor output can be controlled within 5μs,which can correctly reflect the change of the fault current,mean while the sensitivity of the sensor is greater than 0.15V/（A·μs-1）.

关 键 词：电力系统 直流输电系统 电流变化率 传感器 保护 

分 类 号：TM77[电气工程—电力系统及自动化]