相电流差突变量选相在混压同塔输电线跨电压故障中的适应性分析

摘要
图/表
参考文献
相关文章 (6)

全文: PDF (2398 KB)
输出: BibTeX | EndNote (RIS)

摘要混压同塔四回线易发跨电压故障。对方向或距离纵联保护而言,故障选相非常重要。以弱电强磁的混压同塔四回线系统中单相跨单相接地故障为例,提出了一种将混压同塔四回线路进行完全解耦的复合序网图故障分析方法,并分析在此工况下与实际中所用的简化计算方法下相电流差突变量之间的差异,最后得到相电流差突变量选相适应性与两系统电源电动势相角之间的关系。分析表明,当电源电动势相角之差在不同的范围内时,相电流差突变量选相适应性不同,给出了不同适应性情况下分别对应的相角范围。最后,利用PSCAD软件建立了一个500 kV/220 kV同塔四回线路模型,验证了理论分析的可靠性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	刘欣
	黄少锋
	张鹏

关键词 ：跨电压故障, 单相跨单相接地, 混压同塔四回线, 复合序网图, 选相, 相电流差突变量

Abstract：Cross-voltage fault is prone to occur in the mixed-voltage multi-circuit transmission lines system.As to the direction pilot protection and distance pilot protection,phase-selector is important.Taken the single phase to single phase cross-voltage earthed fault in transmission lines with strong-magnetic and weak-electric condition as an example,a composite sequence method that could decoupled the mixed-voltage transmission completely is proposed in this paper.The difference of the sudden-change of phase-current-difference between the proposed phase-selectors and the practically used simplified method is analyzed.Then the relationship between the adaptability of the phase-selector and the electromotive force phase difference of two sources is analyzed.The result shows that the adaptability is depend on the range of the electromotive force phase difference.The ranges of the phase differences for different situations are calculated.Finally,the theoretical analysis is tested in a 500 kV/220 kV four-circuit transmission line model built in PSCAD.

Key words： Cross-voltage fault single phase to single phase earthed fault mixed-voltage four-circuit transmission lines sequence-network phase-selector sudden-change of phase-current-difference

收稿日期: 2015-04-28 出版日期: 2015-11-12

PACS:

TM315

通讯作者: 刘欣女,1987年生,博士研究生,研究方向为电力系统继电保护。

作者简介: 黄少锋男,1958年生,教授,博师生导师,研究方向为电力系统继电保护。

引用本文:

刘欣,黄少锋,张鹏. 相电流差突变量选相在混压同塔输电线跨电压故障中的适应性分析[J]. 电工技术学报, 2015, 30(21): 118-126. Liu Xin,Huang Shaofeng,Zhang Peng. Adaptability Analysis of Phase-selector Based on Sudden-change of Phase-current-difference in Cross-voltage Fault Occurred in Mixed-voltage Transmission Lines. Transactions of China Electrotechnical Society, 2015, 30(21): 118-126.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I21/118

[1] Stewart J R,Wilson D D.High phase order transmission-a feasibility analysis:part II-over voltages and insulation requirements[J].IEEE Transactions on Power Apparatus and Systems,1997,35(6):2308-2317.
[2] 刘家军.平行双回线中串补电容对零序电抗型距离保护的影响[J].电工技术学报,2011,26(7):264-270.
Liu Jiajun.Influence of series compensation capacitor on zero-sequence reactance-type distance protection in parallel double-circuit lines[J].Transactions of China Electrotechnical Society,2011,26(7):264-270.
[3] 李斌.特高压同杆双回线的环流不平衡及其影响[J].电工技术学报,2012,27(4):202-208.
Li Bin.Circulating unbalanced current and its influence of double-circuit UHV transmission lines[J].Transactions of China Electrotechnical Society,2012,27(4):202-208.
[4] 陈福锋,钱国明.基于同杆双回线跨线故障识别的选相方案[J].电力系统自动化,2008,32(6):66-70.
Chen Fufeng,Qian Guoming.Research on fault phase selector of protective relay for double circuit lines based on crossing-line fault identifying[J].Automation of Electric Power Systems,2008,32(6):66-70.
[5] 俞波,杨奇逊,李营,等.同杆并架双回线保护选相元件研究[J].中国电机工程学报,2003,23(4):38-42.
Yu Bo,Yang Qixun,Li Ying,et al.Research on fault phase selector of protective relay for double circuit lines on the same tower[J].Proceedings of the CSEE,2003,23(4):38-42.
[6] 张海,黄少锋.利用电压辅助电流选相的同杆双回线单端电气量选相原理[J].中国电机工程学报,2013,33(7):139-148.
Zhang Hai,Huang Shaofeng.A fault phase selection scheme of currents with assistant voltages for common-tower double-circuit transmission lines using one-terminal electrical quantities[J].Proceedings of the CSEE,2013,33(7):139-148.
[7] 李振兴.基于综合阻抗比较原理的广域继电保护算法[J].电工技术学报,2012,27(8):179-186.
Li Zhenxing.A study of wide-area protection algorithm based on integrated impedance comparison[J].Transactions of China Electrotechnical Society,2012,27(8):179-186.
[8] 李伟,毕天姝,徐振宇,等.相间接地故障时常规选相元件动作行为分析及改进措施[J].电力系统保护与控制,2012,40(3):67-72.
Li Wei,Bi Tianshu,Xu Zhenyu,et al.Analysis of phase selector action and improving scheme for two-phase-to-ground fault[J].Power System Protection and Control,2012,40(3):67-72.
[9] 田书,刘芳芳,任晓明.基于暂态量的同塔双回线路故障选相研究[J].电力系统保护与控制,2015,43(1):50-54.
Tian Shu,Liu Fangfang,Ren Xiaoming.Research on transient-based faulty phase selection for double-circuit lines on the same tower[J].Power System Protection and Control,2015,43(1):50-54.
[10]曾耿晖,黄明辉,刘之尧,等.同杆线路纵联零序保护误动分析及措施[J].电力系统自动化,2006,30(20):103-107.
Zeng Genghui,Huang Minghui,Liu Zhiyao,et al.Analysis on mis-operations of zero-sequence protective relay in double circuit lines on the same tower[J].Automation of Electric Power System,2006,30(20):103-107.
[11]张琦兵,邰能灵,袁成,等.同塔四回输电线的相模变换[J].中国电机工程学报,2009,29(34):57-62.
Zhang Qibing,Tai Nengling,Yuan Cheng,et al.Phase-mode transformation of four-parallel lines on the same tower[J].Proceedings of the CSEE,2009,29(34):57-62.
[12]刘玲,范春菊.基于六序分量法的跨电压等级的同塔四回线的故障计算[J].电力系统保护与控制,2010,38(9):6-11.
Liu Ling,Fan Chunju.Fault calculation for joint four transmission lines of different voltage grades on the same tower based on six-sequence-component method[J].Power System Protection and Control,2010,38(9):6-11.
[13]胡志坚,姜美玲.不同电压等级同塔四回输电线路零序电流补偿系数整定研究[J].电网技术,2012,35(7):60-66.
Hu Zhijian,Jiang Meiling.Setting of zero sequence current compensation coefficient for four-circuit transmission lines in different voltage classes on same tower[J].Power System Technology,2012,35(7):60-66.
[14]周春霞,余越,赵寒,等.特高压同塔双回线路零序电流补偿系数整定对接地距离保护的影响研究[J].电网技术,2012,36(12):106-111.
Zhou Chunxia,Yu Yue,Zhao Han,et al.Influence of zero-sequence current compensation coefficient setting on earth-fault distance protection for double circuit uhvac transmission lines on the same tower[J].Power System Technology,2012,36(12):106-111.
[15]马静,史宇欣,马伟,等.基于分布参数的同杆双回线跨线及接地故障单端定位方法[J].电网技术,2014,36(9):2525-2531.
Ma Jing,Shi Yuxin,Ma Wei,et al.Distributed parameter based one-end fault location for inter-line fault and earth fault in double-circuit transmission lines on same tower[J].Power System Technology,2014,36(9):2525-2531.