基于首行波曲率的柔性直流输电线路单端量保护

doi:10.19595/j.cnki.1000-6753.tces.200229

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摘要传统柔性直流输电线路行波保护存在高阻故障时灵敏度不足及拒动的问题。该文首先通过定量分析双极柔性直流输电线路故障时首行波在线路上的色散效应及在边界处的传播特性,推导了区内外故障首行波表达式,得到首行波弯曲程度与故障位置及过渡电阻的关系;其次,利用区内、外故障首行波曲率的显著差异构造故障识别判据,首行波解析式也为定值整定提供了理论依据;然后基于故障极与健全极电流故障分量积分比值实现故障选极,并结合雷击干扰识别判据,形成了完整的柔性直流输电线路单端量保护方案。最后,基于PSCAD/EMTDC进行了仿真分析。结果表明,所提方案能够快速、可靠地识别线路区内外故障,具有较强的抗过渡电阻能力。

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	戴志辉
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关键词 ：柔性直流系统, 直流输电线路, 曲率, 行波色散, 单端保护

Abstract：Legacy traveling-wave protections are susceptible to low sensitivity and failure under high-impedance faults. First, based on quantitative analysis on the dispersion effect of the initial traveling wave on bipolar flexible DC transmission lines and its propagation characteristics at the line boundary, the expression of initial traveling wave was derived. The relationship between the bending degree of the initial traveling wave and the fault distance, as well as the fault resistance, was obtained. Second, the notable difference between the curvature of internal and external faults was utilized to construct the fault identification criterion, and the analytical expression of the initial traveling wave provides the theoretical basis for the threshold setting. Then, the integral ratio of fault and healthy-pole superimposed-currents was used to realize fault-pole selection. Combined with the identification criterion of lightning strikes, a complete single-ended protection scheme for flexible DC transmission lines was formed. Finally, simulation in PSCAD/EMTDC was carried out to verify the scheme. The results show that the proposed scheme with enhanced tolerance to transition resistance can distinguish internal and external faults quickly and reliably.

Key words： Flexible DC system DC transmission line curvature traveling wave dispersion non-unit protection

收稿日期: 2020-03-08

PACS:

TM774

基金资助:国家自然科学基金（51877084）和河北省自然科学基金（E2018502063）资助项目

通讯作者: 戴志辉男,1980年生,博士,副教授,研究方向为电力系统保护与控制。E-mail：daihuadian@163.com

作者简介: 刘自强男,1997年生,硕士研究生,研究方向为电力系统保护与控制。E-mail：yjsncepu@163.com

引用本文:

戴志辉, 刘自强, 刘雪燕, 严思齐, 姜妍. 基于首行波曲率的柔性直流输电线路单端量保护[J]. 电工技术学报, 2021, 36(9): 1831-1841. Dai Zhihui, Liu Ziqiang, Liu Xueyan, Yan Siqi, Jiang Yan. Single-Ended Protection for Flexible DC Transmission Line Based on Curvature of Initial Traveling Wave. Transactions of China Electrotechnical Society, 2021, 36(9): 1831-1841.

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[1] 宋国兵, 王婷, 张晨浩, 等. 利用健全极MMC注入特征信号的直流线路故障性质判别方法[J]. 电工技术学报, 2019, 34(5): 994-1003.
Song Guobing, Wang Ting, Zhang Chenhao, et al.DC line fault identification based on characteristic signal injection using the MMC of sound pole[J]. Transaction of China Electronic technical Society, 2019, 34(5): 994-1003.
[2] Sun Yuanxiang, Li Zhen, Zhang Zhenbin, Hybrid predictive control with simple linear control based circulating current suppression for modular multilevel converters[J]. CES Transactions on Electrical Machines and Systems, 2019, 3(4): 335-341.
[3] 张希鹏, 邰能灵, 郑晓冬, 等. 基于WEMTR的柔性直流输电线路故障测距[J]. 电工技术学报, 2019, 34(3): 589-598.
Zhang Xipeng, Tai Nengling, Zheng Xiaodong, et al.Fault location in VSC-HVDC transmission lines based on WEMTR[J]. Transaction of China Electro-technical Society, 2019, 34(3): 589-598.
[4] 贾科, 赵其娟, 王聪博, 等. 柔性直流配电系统线路保护与定值整定[J]. 电力系统自动化, 2019, 43(19): 171-183.
Jia Ke, Zhao Qijuan, Wang Congbo, et al.Line protection and setting calculation for flexible DC distribution system[J]. Automation of Electric Power Systems, 2019, 43(19): 171-183.
[5] 王晓卫, 高杰, 吴磊, 等. 柔性直流配电网高阻接地故障检测方法[J]. 电工技术学报, 2019, 34(13): 2806-2819.
Wang Xiaowei, Gao Jie, Wu Lei, et al.A high impedance fault detection method for flexible DC distribution network[J]. Transaction of China Electrotechnical Society, 2019, 34(13): 2806-2819.
[6] 李猛, 贾科, 张秋芳, 等. 基于全电流方向特征的柔性直流配电网纵联保护[J]. 电力系统自动化, 2019, 43(23): 116-127, 130.
Li Meng, Jia Ke, Zhang Qiufang, et al.Directional pilot protection for flexible DC distribution network based on directional characteristics of instantaneous current[J]. Automation of Electric Power Systems, 2019, 43(23): 116-127, 130.
[7] 周光阳, 李妍, 何大瑞, 等. 含限流器的多端柔直系统故障保护策略[J]. 电工技术学报, 2020, 35(7): 1432-1443.
Zhou Guangyang, Li Yan, He Darui, et al.Protection scheme for VSC-MTDC System with fault current limiter[J]. Transactions of China Electrotechnical Society, 2020, 35(7): 1432-1443.
[8] 金涛, 苏见燊, 张明扬. 基于混合式断路器的直流电网保护方案研究[J]. 电机与控制学报, 2020, 24(3): 106-113.
Jin Tao, Su Jianshen, Zhang Mingyang.Research on DC grid protection scheme based on hybrid circuit breaker[J]. Electric Machines and Control, 2020, 24(3): 106-113.
[9] 高淑萍, 索南加乐, 宋国兵, 等. 高压直流输电线路电流差动保护新原理[J]. 电力系统自动化, 2010, 34(17): 45-49.
Gao Shuping, Suonan Jiale, Song Guobing, et al.A new current differential protection principle for HVDC transmission lines[J]. Automation of Electric Power Systems, 2010, 34(17): 45-49.
[10] 周家培, 赵成勇, 李承昱, 等. 采用电流突变量夹角余弦的直流电网线路纵联保护方法[J]. 电力系统自动化, 2018, 42(14): 165-171.
Zhou Jiapei, Zhao Chengyong, Li Chengyu, et al.Pilot protection method for DC lines based on included angle cosine of fault current component[J]. Automation of Electric Power System, 2018, 42(14): 165-171.
[11] 宋国兵, 蔡新雷, 高淑萍, 等. 利用电流频率特性的VSC-HVDC 直流输电线路纵联保护[J]. 高电压技术, 2011, 37(8): 1989-1996.
Song Guobing, Cai Xinlei, Gao Shuping, et al.New pilot protection for VSC-HVDC transmission lines using natural frequency characteristic of current[J]. High Voltage Engineering, 2011, 37(8): 1989-1996.
[12] 童宁, 范理想, 林湘宁, 等. 不依赖边界元件及同步对时的多端柔直电网波形匹配式差动保护原理[J]. 中国电机工程学报, 2019, 39(13): 3820-3833.
Tong Ning, Fan Lixiang, Lin Xiangning, et al.Waveform matching based protection strategy for VSC-MTDC independent on synchronization and boundary component[J]. Proceedings of the CSEE, 2019, 39(13): 3820-3833.
[13] 李斌, 何佳伟, 冯亚东, 等. 多端柔性直流电网保护关键技术[J]. 电力系统自动化, 2016, 40(21): 2-12.
Li Bin, He Jiawei, Feng Yadong, et al.Key techniques for protection of multi-terminal flexible DC grid[J]. Automation of Electric Power Systems, 2016, 40(21): 2-12.
[14] 汤兰西, 董新洲, 施慎行, 等. 柔性直流电网线路超高速行波保护原理与实现[J]. 电网技术, 2018, 42(10): 3176-3186.
Tang Lanxi, Dong Xinzhou, Shi Shenxing, et al.Principle and implementation of ultra-high-speed traveling wave based protection for transmission line of flexible HVDC grid[J]. Power System Technology, 2018, 42(10): 3176-3186.
[15] 乔立华, 陶然, 宋国兵, 等. 直流线路边界特性保护综述[J]. 电力系统保护与控制, 2019, 47(19): 179-186.
Qiao Lihua, Tao Ran, Song Guobing, et al.A summary of the boundary characteristics used in DC system relay protection[J]. Power System Protection and Control, 2019, 47(19): 179-186.
[16] 宋国兵, 高淑萍, 蔡新雷, 等. 高压直流输电线路继电保护技术综述[J]. 电力系统自动化, 2012, 36(22): 123-129.
Song Guobing, Gao Shuping, Cai Xinlei, et al.Survey of relay protection technology for HVDC transmission lines[J]. Automation of Electric Power Systems, 2012, 36(22): 123-129.
[17] 董新洲, 汤兰西, 施慎行, 等. 柔性直流输电网线路保护配置方案[J]. 电网技术, 2018, 42(6): 1752-1759.
Dong Xinzhou, Tang Lanxi, Shi Shenxing, et al.Configuration scheme of transmission line protection for flexible HVDC grid[J]. Power System Technology, 2018, 42(6): 1752-1759.
[18] 付华, 陈浩轩, 李秀菊, 等. 含边界元件的MMC-MTDC直流侧单端量故障辨识方法[J]. 电工技术学报, 2021, 36(1): 215-226.
Fu Hua, Chen Haoxuan, Li Xiuju, et al.MMC-MTDC DC side single-ended quantity fault identification method with boundary elements[J]. Transaction of China Electrotechnical Society, 2021, 36(1): 215-226.
[19] 张保会, 孔飞, 张嵩, 等. 高压直流输电线路单端暂态量保护装置的技术开发[J]. 中国电机工程学报, 2013, 33(4): 179-185.
Zhang Baohui, Kong Fei, Zhang Song, et al.Technical development of non-unit protection devices based on transient signals for HVDC transmission lines[J]. Proceedings of the CSEE, 2013, 33(4): 179-185.
[20] 陈仕龙, 束洪春, 万春红, 等. 一种特高压直流输电线路单端电压暂态保护原理[J]. 电力系统保护与控制, 2013, 41(3): 26-31.
Chen Shilong, Shu Hongchun, Wan Chunhong, et al.The principle of single-ended transient based voltage protection for UHVDC transmission line[J]. Power System Protection and Control, 2013, 41(3): 26-31.
[21] 束洪春, 田鑫萃, 张广斌, 等. ±800kV 直流输电线路的极波暂态量保护[J]. 中国电机工程学报, 2011, 31(22): 96-104.
Shu Hongchun, Tian Xincui, Zhang Guangbin, et al.Protection for ±800 kV HVDC transmission lines using pole wave transients[J]. Proceedings of the CSEE, 2011, 31(22): 96-104.
[22] 彭楠, 杨智, 梁睿, 等. 一种半波长输电线路的分布式行波测距方法[J]. 电机与控制学报, 2019, 23(8): 35-42.
Peng Nan, Yang Zhi, Liang Rui, et al.Distributed traveling wave fault location scheme for half-wavelength transmission lines[J]. Electric Machines and Control, 2019, 23(8): 35-42.
[23] 王艳婷, 范新凯, 张保会. 柔性直流电网行波保护解析分析与整定计算[J]. 中国电机工程学报, 2019, 39(11): 3201-3212.
Wang Yanting, Fan Xinkai, Zhang Baohui.The analytical analysis and protection setting of traveling wave protection in VSC-HVDC grid[J]. Proceedings of the CSEE, 2019, 39(11): 3201-3212.
[24] 贾科, 王聪博, 毕天姝, 等. 考虑过渡电阻影响的柔性直流配电系统电流突变量保护[J]. 电网技术, 2018, 42(10): 3187-3195.
Jia Ke, Wang Congbo, Bi Tianshu, et al.A DC current derivative protection with capability of resisting high resistance for flexible DC distribution system[J]. Power System Technology, 2018, 42(10): 3187-3195.
[25] 张晨浩, 宋国兵, 董新洲. 一种应对高阻故障的单端自适应行波保护方法[J]. 中国电机工程学报, 2020, 40(11): 3548-3556.
Zhang Chenhao, Song Guobing, Dong Xinzhou.A non-unit adaptive traveling wave protection method for high impedance faults[J]. Proceedings of the CSEE, 2020, 40(11): 3548-3556.
[26] 陈继开, 孙川, 李国庆, 等. 双极MMC-HVDC 系统直流故障特性研究[J]. 电工技术学报, 2017, 32(10): 53-60, 68.
Chen Jikai, Sun Chuan, Li Guoqing, et al.Study in characteristics of DC fault in bipolar MMC-HVDC system[J]. Transaction of China Electrotechnical Society, 2017, 32(10): 53-60, 68.
[27] 顾垚彬, 宋国兵, 郭安祥, 等. 针对直流线路行波保护的雷击识别方法研究[J]. 中国电机工程学报, 2018, 38(13): 3837-3845.
Gu Yaobin, Song Guobing, Guo Anxiang, et al.A lightning recognition method for DC line travling-wave protection of HVDC[J]. Proceedings of the CSEE, 2018, 38(13): 3837-3845.