故障限流器與輸電線路縱聯(lián)保護(hù)相配合問(wèn)題的研究
董權(quán)力1,王佳成2,時(shí)斌1,李浩1
1 東南大學(xué) 電氣工程學(xué)院,江蘇 南京 210096;2 南京南瑞繼保電氣有限公司,江蘇 南京 211102
摘 要:介紹了方向閉鎖式縱聯(lián)保護(hù)原理,通Matlab 軟件搭建仿真模型,描述了橋式限流器的限流電感不同時(shí)對(duì)電路產(chǎn)生的影響,分析了故障限流器對(duì)限流電感及距離縱聯(lián)保護(hù)的影響,結(jié)果表明,加入故障限流器能改善電流互感器的性能,防止其飽和,減小不平衡電流,也可能造成以序分量為判斷依據(jù)的功率方向繼電器誤動(dòng),妨礙應(yīng)用了功率方向元件的縱聯(lián)保護(hù)正確工作。
關(guān)鍵詞:故障限流器;縱聯(lián)保護(hù);短路電流;輸電線路
中圖分類號(hào):TM773 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2014)06-0018-06
Study on Fault Current Limiter and Power Transmission Pilot Protection Matching Issue
DONG Quan-li1, WANG Jia-cheng2, SHI Bin1, LI Hao1
1 School of Electrical Engineering, Southeast University, Nanjing 210096, China;2 Nari-Relays Electric Co.,Ltd, Nanjing 211102, China
Abstract: Introduction was made to the pilot protection principle of directional locking type. By Matlab software simulation model, this paper described the impact on circuits at time of different current limiting induction of bridge current limiter, analyzing impact of fault current limiter on current limiting induction and distance pilot protection. The result shows that with the fault current limiter added, the performance of current transformer could be improved, so as to prevent it from saturation, to reduce unbalanced current, but to cause power direction relay unwanted operation with sequence component as judging basis, which affects pilot protection correct work of applied power direction element.
Key words: fault current limiter; pilot protection; short circuit current; power transmission line
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