Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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短路電流非周期分量及其在繼電保護(hù)中的應(yīng)用

來(lái)源:電工電氣發(fā)布時(shí)間:2016-04-06 15:06 瀏覽次數(shù):16

短路電流非周期分量及其在繼電保護(hù)中的應(yīng)用 

馮建勤,黃思芳,宋海龍 
鄭州輕工業(yè)學(xué)院 電氣信息工程學(xué)院,河南 鄭州 450002 
 

摘 要:為準(zhǔn)確判斷電力系統(tǒng)短路故障,提出了一種利用短路電流中的非周期分量作為短路故障的判據(jù)。通過(guò)相量分析和仿真分析,研究了短路電流中的非周期分量。利用Matlab仿真軟件提取短路電流中的非周期分量,得出了短路電流中非周期分量的特點(diǎn)。利用這些特點(diǎn)將非周期分量法運(yùn)用到繼電保護(hù)中去,既可單獨(dú)作為線路的主保護(hù),也可與其它保護(hù)相結(jié)合,運(yùn)行結(jié)果表明,運(yùn)用此法可準(zhǔn)確判斷電力系統(tǒng)短路故障。
關(guān)鍵詞:短路電流;非周期分量;光電流互感器;繼電保護(hù)
中圖分類號(hào):TM771 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):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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