一种直流短路电流快速识别方案及其实现  

A Fast Identification Scheme of DC Short Circuit Current and Its Implementation

作　　者：王智勇 朱忠建 蒋风风 WANG Zhiyong;ZHU Zhongjian;JIANG Fengfeng(Navy Military Representative Section at No. 711 Research Institude,Shanghai 201108, China;Daqo Group Co. Ltd. ,Zhenjiang 212211 ,China;School of Electrical Engineering, Xi＇an Jiaotong University ,Xi＇ an 710049, China)

机构地区：[1]海军驻上海711军事代表室,上海201108 [2]大全集团有限公司,江苏镇江212211 [3]西安交通大学电气工程学院,陕西西安710049

出　　处：《电器与能效管理技术》2018年第8期21-27,共7页Electrical & Energy Management Technology

摘　　要：针对直流短路电流识别问题,提出了一种基于FIR滤波器和DDL保护算法的直流短路电流快速识别方案。首先通过MATLAB和Modelsim仿真,验证了FIR滤波器的有效性;其次通过改变短路电流上升率和幅值,验证了DDL保护算法的准确性;最后,经直流断路器开断试验,表明装置的近端短路电流识别时间小于300μs,能够实现直流短路电流的快速识别。Considering the problem of DC short-circuit current identification,a fast short-circuit current identification scheme based on FIR filter and DDL protection algorithm was proposed. Firstly,the effectiveness of FIR filter is verified by Matlab and Modelsim simulation. Secondly,by changing the rise rate and amplitude of shortcircuit current,the accuracy of DDL protection algorithm is verified. Finally,the DC circuit breaker breaking experiment shows that the short circuit current identification time of the device is less than 300 μs,which means the device can realize the fast identification of DC short-circuit current.

关 键 词：直流短路电流识别 FIR滤波器 DDL保护算法 直流断路器开断试验 

分 类 号：TM561[电气工程—电器]