基于初始行波相位差的同杆双回输电线路故障识别
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摘要
为提高行波保护的灵敏性和可靠性,提出一种基于初始电流行波相位比较的同杆双回线路快速保护新算法。基于S变换计算初始行波相位,通过分析同杆双回线路同端和对端上的初始电流行波相位关系构建保护判据。当内部单回线故障时,双回线路同一侧上电流行波相位近乎相反;内部同名相跨线接地故障时,线路同一侧上的电流行波相位近乎相同,同一条线路两端的电流行波相位近乎相同;区外故障时,两条线路同一侧的电流行波相位近乎相同,同一条线路两端的电流行波相位近乎相反。引入行波相位差的概念,通过分析电流行波相位差的变化特征识别同杆双回线路区内外故障。大量的仿真结果表明,该保护性能灵敏、可靠,动作速度快,判据简单,基本不受故障初始角、故障类型和过渡电阻等因素影响。
In order to improve the sensitivity and reliability of traveling wave protection, a new algorithm for fast protection of double transmission lines on same tower is proposed based on initial current traveling wave phase comparison. In view of calculating initial traveling wave phase based on S-transform, and the protection criterion is constructed by analyzing the phasor relations of the initial current traveling wave at the same end and the opposite end of the same line. The current traveling wave phase of the same end is almost the opposite when the internal single line fault occurs. The current traveling wave phase of the same end is almost the same, and the current traveling wave phase of opposite end of the same line is almost the same when the internal cross line of the same phase fault occurs. When the external fault occurs, the current traveling wave phase of the same end is almost the same, and the current traveling wave phase of opposite end of the same line is almost the opposite. This paper introduces the concept of the phase difference of the traveling wave, and identifies the internal and external faults of the double lines on the same tower by analyzing the changing characteristics of the phase difference of the current traveling wave. A large number of simulation results show that the protection performance is sensitive, reliable, fast and simple criteria. The protection is barely influenced by the initial angle, fault type and transition resistance and other factors.
In order to improve the sensitivity and reliability of traveling wave protection, a new algorithm for fast protection of double transmission lines on same tower is proposed based on initial current traveling wave phase comparison. In view of calculating initial traveling wave phase based on S-transform, and the protection criterion is constructed by analyzing the phasor relations of the initial current traveling wave at the same end and the opposite end of the same line. The current traveling wave phase of the same end is almost the opposite when the internal single line fault occurs. The current traveling wave phase of the same end is almost the same, and the current traveling wave phase of opposite end of the same line is almost the same when the internal cross line of the same phase fault occurs. When the external fault occurs, the current traveling wave phase of the same end is almost the same, and the current traveling wave phase of opposite end of the same line is almost the opposite. This paper introduces the concept of the phase difference of the traveling wave, and identifies the internal and external faults of the double lines on the same tower by analyzing the changing characteristics of the phase difference of the current traveling wave. A large number of simulation results show that the protection performance is sensitive, reliable, fast and simple criteria. The protection is barely influenced by the initial angle, fault type and transition resistance and other factors.
引文
[1]毕天姝,李伟,徐振宇,等.基于单端单回线电气量的同杆双回线单相接地距离保护[J].电力系统自动化,2013,37(7):88-93.BI Tianshu,LI Wei,XU Zhenyu,et al.Single-phase grounding distance protection of parallel transmission lines on same poles based on electric quantities data from single terminal and single line[J].Automation of Electric Power Systems,2013,37(7):88-93.
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[7]李小鹏,何正友,武骁.基于S变换能量相对熵的高压输电线路极性比较式纵联保护[J].电网技术,2014,38(8):2250-2256.LI Xiaopeng,HE Zhengyou,WU Xiao.Polarity comparison pilot protection based on S-transform energy relative entropy for high voltage transmission lines[J].Power System Technology,2014,38(8):2250-2256.
[8]RAMAR K,LOW H S,NGU E E.One-end impedance based fault location in double-circuit transmission lines with different configurations[J].Electrical Power and Energy Systems,2015,64(1):1159-1165.
[9]何奔腾,胡为进.同杆并架双回线路模变换分析[J].电网技术,1998,22(1):25-30.HE Benteng,HU Weijin.Mode transformation of doublecircuit line tower[J].Power System Technology,1998,22(1):25-30.
[10]钱鑫,施围.同杆双回路不同换位下模量分析[J].电网技术,2001,25(8):24-27.QIAN Xin,SHI Wei.Mode analysis of different transported double circuit on same tower[J].Power System Technology,2001,25(8):24-27.
[11]蔡国伟,周国屏,李凌.基于同步相量测量的同杆双回路继电保护方案的研究[J].电力自动化设备,2007,27(6):56-59.CAI Guowei,ZHOU Guoping,LI Ling.Protection scheme for double-line with same pole based on synchronized phasor measurement[J].Electric Power Automation Equipment,2007,27(6):56-59.
[12]张武军,何奔腾,洪光辉,等.同杆并架双回线路行波差动保护[J].电力系统自动化,2008,32(17):66-71.ZHANG Wujun,HE Benteng,HONG Guanghui,et al.Traveling-wave differential relay scheme for double-circuit parallel lines on the same pole[J].Automation of Electric Power Systems,2008,32(17):66-71.
[13]范春菊,郁惟镛,LI K K.基于横差模电流暂态能量的同杆双回线保护方案[J].电网技术,2006,30(18):69-74.FAN Chunju,YU Weiyong,LI K K.Protection scheme for double lines on same tower based on transient energy of modal differential transverse current[J].Power System Technology,2006,30(18):69-74.
[14]EISSA M M,MASOUD M.A novel digital distance relaying technique for transmission line protection[J].IEEETransactions on Power Delivery,2001,16(3):380-384.
[15]张海,黄少锋.一种适用于低线间距的同杆双回线跨线故障等值算法[J].电力系统保护与控制,2012,40(20):56-61.ZHANG Hai,HUANG Shaofeng.An interline fault equivalent algorithm for common-tower doubletransmission line with narrow line-to-line distance[J].Power System Protection and Control,2012,40(20):56-61.
[16]刘兴茂,林圣,何正友,等.基于S变换的新型波阻抗方向继电器[J].中国电机工程学报,2013,33(22):113-119.LIU Xingmao,LIN Sheng,HE Zhengyou,et al.A novel surge impedance directional relay based on S transform[J].Proceedings of the CSEE,2013,33(22):113-119.
[17]刘兴茂,林圣,何正友,等.基于S变换的行波相位比较式方向继电器[J].电网技术,2014,38(3):744-749.LIU Xingmao,LIN Sheng,HE Zhengyou,et al.Stransform based travelling wave phase comparison directional relay[J].Power System Technology,2014,38(3):744-749.
[18]吴浩,李群湛,刘炜.输电线路功率型行波纵联保护新方法[J].电力系统自动化,2016,40(2):107-113.WU Hao,LI Qunzhan,LIU Wei.A new pilot protection algorithm based on traveling wave power for transmission lines[J].Automation of Electric Power Systems,2016,40(2):107-113.
[19]吴浩.基于S变换样本熵的输电线路纵联保护新原理[J].电力系统保护与控制,2016,44(12):15-22.WU Hao.A new pilot protection principle based on S-transform sample entropy[J].Power System Protection and Control,2016,44(12):15-22.
[20]覃星福,龚仁喜.基于广义S变换与PSO-PNN的电能质量扰动识别[J].电力系统保护与控制,2016,44(15):10-17.QIN Xingfu,GONG Renxi.Power quality disturbances classification based on generalized S-transform and PSO-PNN[J].Power System Protection and Control,2016,44(15):10-17.
[21]张太升,鄢安河,赵一,等.同杆双回线的新型继电保护方案研究[J].继电器,2008,36(8):16-19.ZHANG Taisheng,YAN Anhe,ZHAO Yi,et al.Study of a new relay protection scheme for double-circuit lines on the same pole[J].Relay,2008,36(8):16-19.
[2]李小鹏,何正友,夏璐璐.同杆双回输电线路的固有频率测距算法[J].电力系统自动化,2011,35(12):47-51.LI Xiaopeng,HE Zhengyou,XIA Lulu.Natural frequencies based fault location algorithm for parallel transmission lines on the same tower[J].Automation of Electric Power Systems,2011,35(12):47-51.
[3]张旭升,李旭,樊占峰,等.同塔四回线路纵向故障对零序方向保护的影响研究[J].电力系统保护与控制,2017,45(7):114-120.ZHANG Xusheng,LI Xu,FAN Zhanfeng,et al.Influence research of longitudinal fault on zero sequence direction protection for four parallel transmission lines on the same tower[J].Power System Protection and Control,2017,45(7):114-120.
[4]朱忆洋,都洪基,赵青春.不对称参数同杆双回线选相方法研究[J].电力系统保护与控制,2017,45(15):133-139.ZHU Yiyang,DU Hongji,ZHAO Qingchun.Research on phase selection for double-circuit lines on the same tower with asymmetrical parameters[J].Power System Protection and Control,2017,45(15):133-139.
[5]陈青,徐文远.同杆双回线故障分析新方法研究[J].中国机电工程学报,2005,25(20):68-71.CHEN Qin,XU Wenyuan.Research on fault analysis of double circuit lines on the same tower[J].Proceedings of the CSEE,2005,25(20):68-71.
[6]张武军,何奔腾.行波差动保护不平衡电流分析及使用方案[J].电力系统自动化,2007,31(20):49-55.ZHANG Wujun,HE Benteng.Analysis and application of unbalanced differential current in traveling wave different protection[J].Automation of Electric Power Systems,2007,31(20):49-55.
[7]李小鹏,何正友,武骁.基于S变换能量相对熵的高压输电线路极性比较式纵联保护[J].电网技术,2014,38(8):2250-2256.LI Xiaopeng,HE Zhengyou,WU Xiao.Polarity comparison pilot protection based on S-transform energy relative entropy for high voltage transmission lines[J].Power System Technology,2014,38(8):2250-2256.
[8]RAMAR K,LOW H S,NGU E E.One-end impedance based fault location in double-circuit transmission lines with different configurations[J].Electrical Power and Energy Systems,2015,64(1):1159-1165.
[9]何奔腾,胡为进.同杆并架双回线路模变换分析[J].电网技术,1998,22(1):25-30.HE Benteng,HU Weijin.Mode transformation of doublecircuit line tower[J].Power System Technology,1998,22(1):25-30.
[10]钱鑫,施围.同杆双回路不同换位下模量分析[J].电网技术,2001,25(8):24-27.QIAN Xin,SHI Wei.Mode analysis of different transported double circuit on same tower[J].Power System Technology,2001,25(8):24-27.
[11]蔡国伟,周国屏,李凌.基于同步相量测量的同杆双回路继电保护方案的研究[J].电力自动化设备,2007,27(6):56-59.CAI Guowei,ZHOU Guoping,LI Ling.Protection scheme for double-line with same pole based on synchronized phasor measurement[J].Electric Power Automation Equipment,2007,27(6):56-59.
[12]张武军,何奔腾,洪光辉,等.同杆并架双回线路行波差动保护[J].电力系统自动化,2008,32(17):66-71.ZHANG Wujun,HE Benteng,HONG Guanghui,et al.Traveling-wave differential relay scheme for double-circuit parallel lines on the same pole[J].Automation of Electric Power Systems,2008,32(17):66-71.
[13]范春菊,郁惟镛,LI K K.基于横差模电流暂态能量的同杆双回线保护方案[J].电网技术,2006,30(18):69-74.FAN Chunju,YU Weiyong,LI K K.Protection scheme for double lines on same tower based on transient energy of modal differential transverse current[J].Power System Technology,2006,30(18):69-74.
[14]EISSA M M,MASOUD M.A novel digital distance relaying technique for transmission line protection[J].IEEETransactions on Power Delivery,2001,16(3):380-384.
[15]张海,黄少锋.一种适用于低线间距的同杆双回线跨线故障等值算法[J].电力系统保护与控制,2012,40(20):56-61.ZHANG Hai,HUANG Shaofeng.An interline fault equivalent algorithm for common-tower doubletransmission line with narrow line-to-line distance[J].Power System Protection and Control,2012,40(20):56-61.
[16]刘兴茂,林圣,何正友,等.基于S变换的新型波阻抗方向继电器[J].中国电机工程学报,2013,33(22):113-119.LIU Xingmao,LIN Sheng,HE Zhengyou,et al.A novel surge impedance directional relay based on S transform[J].Proceedings of the CSEE,2013,33(22):113-119.
[17]刘兴茂,林圣,何正友,等.基于S变换的行波相位比较式方向继电器[J].电网技术,2014,38(3):744-749.LIU Xingmao,LIN Sheng,HE Zhengyou,et al.Stransform based travelling wave phase comparison directional relay[J].Power System Technology,2014,38(3):744-749.
[18]吴浩,李群湛,刘炜.输电线路功率型行波纵联保护新方法[J].电力系统自动化,2016,40(2):107-113.WU Hao,LI Qunzhan,LIU Wei.A new pilot protection algorithm based on traveling wave power for transmission lines[J].Automation of Electric Power Systems,2016,40(2):107-113.
[19]吴浩.基于S变换样本熵的输电线路纵联保护新原理[J].电力系统保护与控制,2016,44(12):15-22.WU Hao.A new pilot protection principle based on S-transform sample entropy[J].Power System Protection and Control,2016,44(12):15-22.
[20]覃星福,龚仁喜.基于广义S变换与PSO-PNN的电能质量扰动识别[J].电力系统保护与控制,2016,44(15):10-17.QIN Xingfu,GONG Renxi.Power quality disturbances classification based on generalized S-transform and PSO-PNN[J].Power System Protection and Control,2016,44(15):10-17.
[21]张太升,鄢安河,赵一,等.同杆双回线的新型继电保护方案研究[J].继电器,2008,36(8):16-19.ZHANG Taisheng,YAN Anhe,ZHAO Yi,et al.Study of a new relay protection scheme for double-circuit lines on the same pole[J].Relay,2008,36(8):16-19.