Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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短路电流非周期分量及其在继电保护中的应用

来源:电工电气发布时间:2016-04-06 15:06 浏览次数:14

短路电流非周期分量及其在继电保护中的应用 

冯建勤,黄思芳,宋海龙 
郑州轻工业学院 电气信息工程学院,河南 郑州 450002 
 

摘 要:为准确判断电力系统短路故障,提出了一种利用短路电流中的非周期分量作为短路故障的判据。通过相量分析和仿真分析,研究了短路电流中的非周期分量。利用Matlab仿真软件提取短路电流中的非周期分量,得出了短路电流中非周期分量的特点。利用这些特点将非周期分量法运用到继电保护中去,既可单独作为线路的主保护,也可与其它保护相结合,运行结果表明,运用此法可准确判断电力系统短路故障。
关键词:短路电流;非周期分量;光电流互感器;继电保护
中图分类号:TM771 文献标识码:B 文章编号:1007-3175(2014)12-0035-04


Short-Circuit Current Aperiodic Components and Their Application in Relay Protection 

FENG Jian-qin, HUANG Si-fang, SONG Hai-long 
College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China 
 

Abstract:In order to accurately determine the short-circuit fault in power system, this paper proposed to use the aperiodic components in short-circuit current as a criterion in short-circuit faults and studied the aperiodic components in short-circuit current by phasor and simulation analysis. The aperiodic components in short-circuit current were simulated and extracted in Matlab to obtain the characteristics of the aperiodic components in the short-circuit current, so that the aperiodic components method was applied in the relay protection, either as a primary protection circuit alone, or as the combination with other protection circuit. The results show that this method can accurately judge the short-circuit faults of the power system.
                Key words:short-circuit current; aperiodic components; optical current transducer; relay protection


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