沖擊電流法測(cè)試斷路器回路電阻的研究
夏小飛1,陳銳2,張博2,周蠡2,魯鐵成2
1 廣西電網(wǎng)公司電力科學(xué)研究院,廣西 南寧 530023;
2 武漢大學(xué) 電氣工程學(xué)院,湖北 武漢 430072)
摘 要:提出了一種峰值達(dá)1000A以上的沖擊大電流檢測(cè)回路電阻的方法,該方法能夠精確地測(cè)量斷路器的回路電阻。通過(guò)實(shí)驗(yàn)室的模擬試驗(yàn),研究了基于超級(jí)電容器產(chǎn)生千安級(jí)沖擊大電流的實(shí)現(xiàn)方法,并驗(yàn)證了微歐級(jí)小電阻的測(cè)量精度,通過(guò)EMTP-ATP仿真分析計(jì)算可知,均壓電容和引線電感對(duì)測(cè)試的最終結(jié)果無(wú)影響。
關(guān)鍵詞:斷路器;回路電阻;沖擊大電流;均壓電容;引線電感
中圖分類號(hào):TM561 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2013)07-0037-05
Study on Testing Circuit Breaker Loop Resistance with High Impulse Current Method
XIA Xiao-fei1, CHEN Rui2, ZHANG Bo2, ZHOU Li2, LU Tie-cheng2
1 Electric Power Research Institute of Guangxi Power Grid Corp, Nanning 530023, China;
2 School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Abstract: This paper raised a kind of method with peak value over 1000A high impulse current, which could precisely test loop resistance of circuit breakers. Via simulative tests of lab, study was made on the realization method that the super capacitor generated thousand ampere grade high impulse current and the measurement accuracy of microhm grade small resistor was verified. The simulation calculation of EMTP-ATP shows that the even voltage capacitance and lead inductance have no any impacts on final result of tests.
Key words: circuit breaker; loop resistance; high impulse current; grading capacitor; wire inductance
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