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针对目前柔性直流线路区内保护末端高阻故障拒动、耐同步性差、噪声干扰等问题，提出一种基于故障行波变步导数动态时间扭曲距离的柔性直流输电线路保护方案。首先，从故障行波时域波形差异角度出发，分析区内、外故障时两端保护处电压行波的故障特性，得到区内、外故障异名行波相似度差异；然后，通过变步导数动态时间扭曲算法将行波波形在时间轴上进行偏移和伸缩，对不同时刻的波形进行匹配和分析，削弱传播时延对波形相似度的影响，在启动判据启动后，以变步导数动态时间扭曲距离表征并度量行波相似度，并据此判别区内、外故障。最后，仿真验证了所提保护方案的正确性和适用性。
Abstract：Aimed at the issues in flexible DC line protection such as failure to operate under internal high-impedance faults at a distant end,poor synchronization resistance and noise interference,a protection scheme for flexible DC transmission lines based on the variational step derivative dynamic time warping(VS-DDTW)distance of fault traveling waves is proposed. First,from the aspect of time-domain waveform differences in fault traveling waves,the fault characteristics of voltage traveling waves at both ends under internal and external faults are analyzed to obtain the corresponding similarity differences in opposite-name traveling waves. Then,the VS-DDTW algorithm is used to shift and stretch the traveling waveforms on the time axis,and the waveforms at different moments are matched and analyzed,thus reducing the influence of propagation delay on the waveform similarity. After the startup criterion is met,the VS-DDTW distance is used to characterize and measure the traveling wave similarity,so as to distinguish the internal and external faults. Finally,simulation results verify the validity and applicability of the proposed protection scheme.
[1]姚良忠，吴婧，王志冰，等（Yao Liangzhong,Wu Jing,Wang Zhibing,et al）.未来高压直流电网发展形态分析（Pattern analysis of future HVDC grid development）[J].中国电机工程学报（Proceedings of the CSEE）,2014,34(34):6007-6020.
[2]李振兴，崔晓琳，徐浩（Li Zhenxing,Cui Xiaolin,Xu Hao）.基于双端电流杰卡德相似度比较的柔性直流输电线路保护（Protection of flexible DC transmission line based on double-end current Jaccard similarity coefficient comparison）[J].电力系统及其自动化学报（Proceedings of the CSU-EPSA）,2023,35(5):37-47.
[3]刘树桦，王建学，李清涛，等（Liu Shuhua,Wang Jianxue,Li Qingtao,et al）.多能互补复合电站的优化配置及其在系统电源规划中的应用（Optimal configuration of multi-energy complementary composite power plant and its application in generation expansion planning）[J].电网技术（Power System Technology）,2021,45(8):3006-3014.
[4]汤广福，罗湘，魏晓光（Tang Guangfu,Luo Xiang,Wei Xiaoguang）.多端直流输电与直流电网技术（Multi-terminal HVDC and DC-grid technology）[J].中国电机工程学报（Proceedings of the CSEE）,2013,33(10):8-17.
[5]张峻榤，向往，饶宏，等（Zhang Junjie,Xiang Wang,Rao Hong,et al）.含直流断路器的架空柔性直流电网直流故障保护方案研究（Research on DC fault protection scheme of overhead MMC based DC grid with DC circuit breaker）[J].中国电机工程学报（Proceedings of the CSEE）,2018,38(16):4631-4645.
[6]蔡静，董新洲（Cai Jing,Dong Xinzhou）.高压直流输电线路故障清除及恢复策略研究综述（Overview on research of fault clearing and recovery strategy for HVDC transmission lines）[J].电力系统自动化（Automation of Electric Power Systems）,2019,43(11):181-190.
[7]Livani H,Evrenosoglu C Y. A single-ended fault location method for segmented HVDC transmission line[J]. Electric Power Systems Research,2014,107:190-198.
[8]张艳霞，李多多，张帅，等（Zhang Yanxia,Li Duoduo,Zhang Shuai,et al）.基于广义S变换的高压直流输电线路边界保护（Boundary protection of HVDC transmission lines based on generalized S-transform）[J].高电压技术（High Voltage Engineering）,2018,44(10):3197-3206.
[9]王永进，樊艳芳（Wang Yongjin,Fan Yanfang）.基于反行波与信号处理的特高压直流输电线路纵联保护方法（Longitudinal protection method based on reverse traveling wave and signal processing for UHVDC power transmission line）[J].电力自动化设备（Electric Power Automation Equipment）,2020,40(3):114-121.
[10]刘剑，邰能灵，范春菊，等（Liu Jian,Tai Nengling,Fan Chunju,et al）.基于暂态电流Pearson相关性的两电平VSC-HVDC直流线路故障判别（A fault identification method for two-level VSC-HVDC DC line based on Pearson correlation of transient current）[J].电工技术学报（Transactions of China Electrotechnical Society）,2017,32(3):74-85.
[11]宋国兵，侯俊杰，郭冰（Song Guobing,Hou Junjie,Guo Bing）.基于主动探测式的混合MMC直流输电系统单端量故障定位（Single-ended fault location of hybrid MMC-HVDC system based on active detection）[J].电网技术（Power System Technology）,2021,45(2):730-740.
[12]Xiang Wang,Zhang Haobo,Yang Saizhao,et al. A differential pilot protection scheme for MMC-based DC grid resilient to communication failure[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics,2021,9(5):5631-5645.
[13]Tong Ning,Lin Xiangning,Li Yan,et al. Local measurement-based ultra-high-speed main protection for long distance VSC-MTDC[J]. IEEE Transactions on Power Delivery,2019,34(1):353-364.
[14]Zheng Xiaodong,Nadeem M H,Tai Nengling,et al. A transient current protection and fault location scheme for MMC-HVDC transmission network[J]. International Journal of Electrical Power and Energy Systems,2021,124:106348.
[15]董新洲，雷傲宇，汤兰西，等（Dong Xinzhou,Lei Aoyu,Tang Lanxi,et al）.行波特性分析及行波差动保护技术挑战与展望（Analysis of traveling wave characteristics and challenges and prospects of traveling wave differential protection technology）[J].电力系统自动化（Automation of Electric Power Systems）,2018,42(19):184-191.
[16]韦延方，王志杰，王鹏，等（Wei Yanfang,Wang Zhijie,Wang Peng,et al）.基于限流电抗电压的柔性直流配电网故障保护方法（Protection method for flexible DC distribution network faults based on current limiting reactance voltage）[J].高电压技术（High Voltage Engineering）,2022,48(12):5068-5079.——
[17]戴志辉，张程，刘宁宁，等（Dai Zhihui,Zhang Cheng,Liu Ningning,et al）.基于反行波差值的特高压直流线路纵联保护方案（A pilot protection scheme for UHVDC lines based on backward traveling-wave difference）[J].电力系统保护与控制（Power System Protection and Control）,2019,47(21):1-10.
[18]李爱民，蔡泽祥，李晓华（Li Aimin,Cai Zexiang,Li Xiaohua）.直流线路行波传播特性的解析（Study on the propagation characteristics of traveling waves in HVDC transmission lines on the basis of analytical method）[J].中国电机工程学报（Proceedings of the CSEE）,2010,30(25):94-100.
[19]王业，陆于平，徐以超，等（Wang Ye,Lu Yuping,Xu Yichao,et al）.基于动态时间弯曲的差动保护算法（A differential protection algorithm based on dynamic time warping）[J].中国电机工程学报（Proceedings of the CSEE）,2012,32(28):133-141.
[20]顾垚彬，宋国兵，郭安祥，等（Gu Yaobin,Song Guobing,Guo Anxiang,et al）.针对直流线路行波保护的雷击识别方法研究（A lightning recognition method for DC line travling-wave protection of HVDC）[J].中国电机工程学报（Proceedings of the CSEE）,2018,38(13):3837-3845.
[21]郑涛，吴琼，吕文轩，等（Zheng Tao,Wu Qiong,LüWenxuan,et al）.基于直流电流过零特征的柔性直流配电网保护方案研究（Research on protection scheme of flexible DC distribution grids based on DC current zero-crossing characteristics）[J].电网技术（Power System Technology）,2020,44(5):1806-1814.
[22]陈宁，齐磊，崔翔，等（Chen Ning,Qi Lei,Cui Xiang,et al）.适用于柔性直流电网操作过电压分析的混合式高压直流断路器端口等效模型（Port equivalent model of hybrid high voltage DC breaker for switching overvoltage simulation in VSC-HVDC grids）[J].高电压技术（High Voltage Engineering）,2020,46(6):2175-2184.
[23]戴志辉，刘雪燕，刘自强，等（Dai Zhihui,Liu Xueyan,Liu Ziqiang,et al）.基于电流故障分量的柔直配电线路纵联保护原理（Pilot protection scheme for flexible DC distribution grids based on superimposed current）[J].高电压技术（High Voltage Engineering）,2021,47(5):1684-1695.
基本信息:
DOI：10.19635/j.cnki.csu-epsa.001606
中图分类号:TM773;TM721.1
引用信息:
[1]韦延方,吴凯航,王晓卫,等.基于故障行波VS-DDTW距离的柔性直流输电线路保护方案[J].电力系统及其自动化学报,2025,37(12):24-34.DOI:10.19635/j.cnki.csu-epsa.001606.
基金信息:
国家自然科学基金资助项目(61703144); 海南省自然科学基金资助项目(521RC1110)
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