高压直流输电线路暂态量保护元件的频率特性分析
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摘要
目前直流线路行波保护的研究均未全面考虑线路上各元件对故障暂态分量的影响,导致保护的可靠性不足。针对上述不足提出了具有普遍性的分析方法,首先分析频率相关参数输电线路和线路边界的频率特性;然后对特定边界(葛南直流线路边界)透反射系数频率特性的分析发现:边界对频率大于600 Hz的信号具有很强的衰减作用,而对区内直流滤波器调谐频率600 Hz,1 200 Hz,1 800 Hz处的信号具有反向全反射的特点;另外,考虑到直流线路的频率相关特性,线路保护判据的构建宜选用直流滤波器调谐频率段内的信号分量。
The current traveling wave protections for DC line are mostly unreliable and insensitive because of no considering the influence to transient component caused by the components on DC line.This paper comprehensive analysis the frequency characteristics of the DC line and the DC boundary.Then the analysis of the frequency characteristics of the refraction and the reflection showed that the DC boundary has a strong attenuation to the signal which frequency is greater than 600 Hz.While to the signal of the tuned frequency 600 Hz,1 200 Hz,1 800 Hz inside the DC line has the features of reverse total reflection.Besides,considering the frequency-dependent characteristics of the line,the construction of the DC line protection criterion should choose the signal components in the band of tuned frequency.
The current traveling wave protections for DC line are mostly unreliable and insensitive because of no considering the influence to transient component caused by the components on DC line.This paper comprehensive analysis the frequency characteristics of the DC line and the DC boundary.Then the analysis of the frequency characteristics of the refraction and the reflection showed that the DC boundary has a strong attenuation to the signal which frequency is greater than 600 Hz.While to the signal of the tuned frequency 600 Hz,1 200 Hz,1 800 Hz inside the DC line has the features of reverse total reflection.Besides,considering the frequency-dependent characteristics of the line,the construction of the DC line protection criterion should choose the signal components in the band of tuned frequency.
引文
[1]刘振亚,舒印彪,张文亮,等.直流输电系统电压等级序列的研究[J].中国电机工程学报,2008,28(10):1 8.Liu Zhenya,Shu Yinbiao,Zhang Wenliang,et al.Study onvoltage class series for HVDC transmission system[J].Proceedings of the CSEE,2008,28(10):1 8.
[2]任达勇.天广直流工程历年双极闭锁事故分析[J].高电压技术,2006,32(9):173175.Ren Dayong.Analysis of bipole block events over the yearsof Tian-Guang HVDC project[J].High Voltage Engineer-ing,2006,32(9):173 175.
[3]田庆,原敏宏,王志平.葛南直流线路高阻接地故障保护分析[J].电力系统及其自动化学报,2008,20(6):60 63.Tian Qing,Yuan Minhong,Wang Zhiping.Analysis of Ge-Nan HVDC line protection against high-impedance groundfault[J].Proceedings of the CSU-EPSA,2008,20(6):60 63.
[4]周红阳,余江,黄佳胤,等.直流线路纵联差动保护的相关问题[J].南方电网技术,2008,2(3):1721.Zhou Hongyang,Yu Jiang,Huang Jiayin,et al.Issues overDC line differential protection[J].Southern Power SystemTechnology,2008,2(3):17 21.
[5]黄佳胤,周红阳,余江.“3.21”天广直流线路高阻抗接地故障的分析与仿真[J].广东电力,2005,18(11):15 17,25.Huang Jiayin,Zhou Hongyang,Yu Jiang.Analysis and sim-ulation on‘3.21’high impedance earth fault of Tian-Guang HVDC project[J].Guangdong Electric Power,2005,18(11):15 17,25.
[6]张保会,张嵩,尤敏,等.高压直流线路单端暂态量保护研究[J].电力系统保护与控制,2010,38(15):18 23.Zhang Baohui,Zhang Song,You Min,et al.Research ontransient-based protection for HVDC lines[J].Power Sys-tem Protection and Control,2010,38(15):18 23.
[7]束洪春,刘可真,朱盛强,等.±800kV特高压直流输电线路单端电气量暂态保护[J].中国电机工程学报,2010,30(31):108 117.Shu Hongchun,Liu Kezhen,Zhu Shengqiang,et al.±800 kV UHVDC transmission line protection based on sin-gle end electrical transient signal[J].Proceedings of theCSEE,2010,30(31):108 117.
[8]Chen Shilong,Shu Hongchun,Wang Yongzhi,et al.Dis-tance protection scheme with traveling wave for UHVDCtransmission line based on wavelet transform[C].Proceed-ings of 2008 International Conference on DRPT,2008.2162 2165.
[9]Shang L,Herold G,Jaeger J,et al.High-speed fault i-dentification and protection for HVDC line using wavelettechnique[C].IEEE Porto Power Tech Conference,2001.
[10]全玉生,李学鹏,马彦伟,等.基于小波变换的HVDC线路行波距离保护[J].电力系统自动化,2005,29(18):52 56.Quan Yusheng,Li Xuepeng,Ma Yanwei,et al.Distanceprotection scheme with traveling wave for HVDC line basedon wavelet transform[J].Automation of Electric PowerSystem,2005,29(18):52-56.
[11]段建东,张保会,任晋峰,等.超高压输电线路单端暂态保护元件的频率特性分析[J].中国电机工程学报,2007,27(1):37 43.Duan Jiandong,Zhang Baohui,Ren Jianfeng,et al.Sin-gle-ended transient-based protection for EHV transmissionlines basic theory[J].Proceeding of the CSEE,2007,27(1):37 43.
[12]葛耀中.新型继电保护和故障测距的原理与技术[M].西安:西安交通大学出版社,2007.
[13]哈恒旭.超高压输电线路边界保护的研究[D].西安:西安交通大学,2002.
[14]陈勇,吴艳辉.基于PSCAD/EMTDC的高压直流输电控制系统的仿真分析[J].电力科学与工程,2008,24(9):10 13.Chen Yong,Wu Yanhui.Simulation and analysis of controlsystem of HVDC based on PSCAD/EMTDC[J].ElectricPower Science and Engineering,2008,24(9):10-13.
[15]赵婉君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
[16]孙中明.葛南直流滤波器性能研究[J].高电压技术,2004,30(11):65 66,71.Sun Zhongming.Study on DC filter performance ofGezhouba-Nanqiao HVDC transmission project[J].HighVoltage Engineering,2004,30(11):65 66,71.
[17]董鑫.高压直流输电线路行波保护的研究[D].吉林:东北电力大学,2008.
[2]任达勇.天广直流工程历年双极闭锁事故分析[J].高电压技术,2006,32(9):173175.Ren Dayong.Analysis of bipole block events over the yearsof Tian-Guang HVDC project[J].High Voltage Engineer-ing,2006,32(9):173 175.
[3]田庆,原敏宏,王志平.葛南直流线路高阻接地故障保护分析[J].电力系统及其自动化学报,2008,20(6):60 63.Tian Qing,Yuan Minhong,Wang Zhiping.Analysis of Ge-Nan HVDC line protection against high-impedance groundfault[J].Proceedings of the CSU-EPSA,2008,20(6):60 63.
[4]周红阳,余江,黄佳胤,等.直流线路纵联差动保护的相关问题[J].南方电网技术,2008,2(3):1721.Zhou Hongyang,Yu Jiang,Huang Jiayin,et al.Issues overDC line differential protection[J].Southern Power SystemTechnology,2008,2(3):17 21.
[5]黄佳胤,周红阳,余江.“3.21”天广直流线路高阻抗接地故障的分析与仿真[J].广东电力,2005,18(11):15 17,25.Huang Jiayin,Zhou Hongyang,Yu Jiang.Analysis and sim-ulation on‘3.21’high impedance earth fault of Tian-Guang HVDC project[J].Guangdong Electric Power,2005,18(11):15 17,25.
[6]张保会,张嵩,尤敏,等.高压直流线路单端暂态量保护研究[J].电力系统保护与控制,2010,38(15):18 23.Zhang Baohui,Zhang Song,You Min,et al.Research ontransient-based protection for HVDC lines[J].Power Sys-tem Protection and Control,2010,38(15):18 23.
[7]束洪春,刘可真,朱盛强,等.±800kV特高压直流输电线路单端电气量暂态保护[J].中国电机工程学报,2010,30(31):108 117.Shu Hongchun,Liu Kezhen,Zhu Shengqiang,et al.±800 kV UHVDC transmission line protection based on sin-gle end electrical transient signal[J].Proceedings of theCSEE,2010,30(31):108 117.
[8]Chen Shilong,Shu Hongchun,Wang Yongzhi,et al.Dis-tance protection scheme with traveling wave for UHVDCtransmission line based on wavelet transform[C].Proceed-ings of 2008 International Conference on DRPT,2008.2162 2165.
[9]Shang L,Herold G,Jaeger J,et al.High-speed fault i-dentification and protection for HVDC line using wavelettechnique[C].IEEE Porto Power Tech Conference,2001.
[10]全玉生,李学鹏,马彦伟,等.基于小波变换的HVDC线路行波距离保护[J].电力系统自动化,2005,29(18):52 56.Quan Yusheng,Li Xuepeng,Ma Yanwei,et al.Distanceprotection scheme with traveling wave for HVDC line basedon wavelet transform[J].Automation of Electric PowerSystem,2005,29(18):52-56.
[11]段建东,张保会,任晋峰,等.超高压输电线路单端暂态保护元件的频率特性分析[J].中国电机工程学报,2007,27(1):37 43.Duan Jiandong,Zhang Baohui,Ren Jianfeng,et al.Sin-gle-ended transient-based protection for EHV transmissionlines basic theory[J].Proceeding of the CSEE,2007,27(1):37 43.
[12]葛耀中.新型继电保护和故障测距的原理与技术[M].西安:西安交通大学出版社,2007.
[13]哈恒旭.超高压输电线路边界保护的研究[D].西安:西安交通大学,2002.
[14]陈勇,吴艳辉.基于PSCAD/EMTDC的高压直流输电控制系统的仿真分析[J].电力科学与工程,2008,24(9):10 13.Chen Yong,Wu Yanhui.Simulation and analysis of controlsystem of HVDC based on PSCAD/EMTDC[J].ElectricPower Science and Engineering,2008,24(9):10-13.
[15]赵婉君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
[16]孙中明.葛南直流滤波器性能研究[J].高电压技术,2004,30(11):65 66,71.Sun Zhongming.Study on DC filter performance ofGezhouba-Nanqiao HVDC transmission project[J].HighVoltage Engineering,2004,30(11):65 66,71.
[17]董鑫.高压直流输电线路行波保护的研究[D].吉林:东北电力大学,2008.