DAI Zhihui,QIN Haoyu,LI Hangze,et al.Single-end Line Protection Based on Reflection Coefficient and Model Matching in Flexible DC Power Grid[J].Automation of Electric Power Systems,2023,47(11):101-109.
DAI Zhihui,QIN Haoyu,LI Hangze,et al.Single-end Line Protection Based on Reflection Coefficient and Model Matching in Flexible DC Power Grid[J].Automation of Electric Power Systems,2023,47(11):101-109. DOI: 10.7500/AEPS20220826008.
Single-end Line Protection Based on Reflection Coefficient and Model Matching in Flexible DC Power Grid
A single-end line protection based on reflection coefficient and model matching is proposed to address the issues of internal remote high-resistance fault rejection and lightning interference misoperation of line protection in flexible DC power grid. First
based on the reflection coefficient of voltage traveling waves
a directional criterion is constructed to avoid protection misoperation under backward faults or lightning stroke. Secondly
using the voltage traveling wave transfer function to analyze internal short-circuit faults
as well as the function model satisfied by the initial traveling wave of fault voltage at the protection point under forward external faults or forward lightning strikes
a recognition criterion based on model matching is designed according to the different matching degrees between the first traveling wave of fault and the reference function model. Then
a complete single-end line protection scheme is constructed by combining the starting criterion and pole-selection criterion. Finally
the PSCAD simulation results verify that the proposed protection scheme has high reliability and can withstand 500 Ω transition resistance and 20 dB noise
关键词
Keywords
references
BERTHO R , LACERDA V A , MONARO R M , et al . Selective nonunit protection technique for multiterminal VSC-HVDC grids [J]. IEEE Transactions on Power Delivery , 2018 , 33 ( 5 ): 2106 - 2114 .
LU Jingjing , HE Zhiyuan , ZHAO Chengyong , et al . Key technologies and prospects for DC power grid planning [J]. Automation of Electric Power Systems , 2019 , 43 ( 2 ): 182 - 191 .
SU Jianshen , GUO Jingdong , JIN Tao . DC fault characteristics and line fault recovery strategy in flexible DC power network [J]. Transactions of China Electrotechnical Society , 2019 , 34 ( Supplement 1 ): 352 - 359 .
ZHAO Chengyong , SONG Bingqian , XU Jianzhong . Overview on typical schemes for active control of fault current in flexible DC grid [J]. Automation of Electric Power Systems , 2020 , 44 ( 5 ): 3 - 13 .
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 .
QUAN Wenjie , TONG Xiaoyang , ZHANG Guangxiao . Single-end flexible DC protection scheme based on similarity of S-transform energy spectrum matrix of traveling wave [J]. Automation of Electric Power Systems , 2022 , 46 ( 7 ): 178 - 186 .
TANG L X , OOI B T . Locating and isolating DC faults in multi-terminal DC systems [J]. IEEE Transactions on Power Delivery , 2007 , 22 ( 3 ): 1877 - 1884 .
GAO Piao , ZHENG Xiaodong , CHAO Chenxu , et al . Protection for multi-terminal flexible DC transmission lines based on boundary transient energy [J]. Automation of Electric Power Systems , 2021 , 45 ( 17 ): 171 - 179 .
ZHANG Yining , ZHANG Dahai , WU Chuanjian , et al . A novel backup protection principle for DC transmission lines based on F-test of low-frequency fault components [J]. Southern Power System Technology , 2021 , 15 ( 7 ): 26 - 33 .
GAO Piao , ZHENG Xiaodong , CHAO Chenxu , et al . Protection for multi-terminal flexible DC transmission lines based on boundary transient energy [J]. Automation of Electric Power Systems , 2021 , 45 ( 17 ): 171 - 179 .
DAI Zhihui , LIU Ziqiang , LIU Xueyan , et al . Single-ended protection for flexible DC transmission line based on curvature of initial traveling wave [J]. Transactions of China Electrotechnical Society , 2021 , 36 ( 9 ): 1831 - 1841 .
DAI Zhihui , LIU Ningning , LIU Yuan , et al . Single-terminal line protection for UHVDC power transmission based on voltage backward traveling wave [J]. Electric Power Automation Equipment , 2019 , 39 ( 9 ): 80 - 87 .
SHU Hongchun , TIAN Xincui , DONG Jun , et al . ±800 kV DC transmission line boundary protection using model matching algorithms in time-domain [J]. Transactions of China Electrotechnical Society , 2013 , 28 ( 10 ): 320 - 327 .
ZHANG Junjie , XIANG Wang , RAO Hong , et al . Research on DC fault protection scheme of overhead MMC based DC grid with DC circuit breaker [J]. Proceedings of the CSEE , 2018 , 38 ( 16 ): 4631 - 4645 .
GU Yaobin , SONG Guobing , GUO Anxiang , et al . A lightning recognition method for DC line traveling-wave protection of HVDC [J]. Proceedings of the CSEE , 2018 , 38 ( 13 ): 3837 - 3845 .
ZHENG Wei , ZHANG Nan , YANG Guangyuan . Comparative and improvement investigation on the DC transmission line traveling wave protections of Siemens and ABB [J]. Power System Protection and Control , 2015 , 43 ( 24 ): 149 - 154 .