LI Zainan,DUAN Jiandong,LU Wenchao,et al.Accelerated Line Pilot Protection of Flexible MVDC Distribution Network[J].Automation of Electric Power Systems,2021,45(9):80-88.
LI Zainan,DUAN Jiandong,LU Wenchao,et al.Accelerated Line Pilot Protection of Flexible MVDC Distribution Network[J].Automation of Electric Power Systems,2021,45(9):80-88. DOI: 10.7500/AEPS20200624005.
Accelerated Line Pilot Protection of Flexible MVDC Distribution Network
The booming development of distributed energy resources (DERs) and the rapid growth of urban DC loads have further consolidated the important position of the flexible DC distribution network in the city. This paper takes the four-terminal flexible medium voltage direct current (MVDC) distribution network as the research object and proposes an accelerated line pilot protection scheme with the engineering requirement of quickness aiming at frequent transient faults of overhead lines. The protection scheme consists of pick-up program
transient fault identification after reclosing
permanent fault type and fault area identification. In order to reduce the maloperation caused by the first operation of acceleration protection
the pick-up program is designed to avoid the conditions of disturbances
line-broken
and power inversion. The direct current circuit breaker (DCCB) starts tripping within 1~2 ms after the fault to ensure that the power electronics in the converter will not be damaged or blocked after the fault. When a permanent fault is identified after the DCCB reclosing
the voltage and current fault information can be used to accurately identify the fault type and fault area. Finally
a four-terminal MVDC distribution network is built in PSCAD to do a large number of simulation tests. The simulation results show the reliability and effectiveness of the proposed acceleration protection scheme.
MA Zhao , ZHOU Xiaoxin , SHANG Yuwei , et al . Form and development trend of future distribution system [J]. Proceedings of the CSEE , 2015 , 35 ( 6 ): 1289 - 1298 .
DUAN Jiandong , LI Zainan , ZHOU Yi , et al . Study on the voltage level sequence of future urban DC distribution network in China: a review [J]. International Journal of Electrical Power & Energy Systems , 2020 , 117 : 1 - 12 .
ZHANG Lu , LIANG Jun , TANG Wei , et al . Converting AC converting AC distribution lines to DC to increase transfer capacity and DG penetration [J]. IEEE Transactions on Smart Grid , 2019 , 10 ( 2 ): 1477 - 1487 .
ZHENG Huan , JIANG Daozhuo , DU Yi . Economic comparison of AC and DC distribution system [J]. Power System Technology , 2013 , 37 ( 12 ): 3368 - 3374 .
SCIANO D , RAZA A , SALCEDO R , et al . Evaluation of DC links on dense-load urban distribution networks [J]. IEEE Transactions on Power Delivery , 2016 , 31 ( 3 ): 1317 - 1326 .
DAI Zhihui , GE Hongbo , YAN Siqi , et al . Fault analysis of flexible DC distribution system [J]. Transactions of China Electrotechnical Society , 2018 , 33 ( 8 ): 1863 - 1874 .
DANTAS R , LIANG J , UGALDE-LOO C E , et al . Progressive fault isolation and grid re-storation strategy for MTDC networks [J]. IEEE Transactions on Power Delivery , 2018 , 33 ( 2 ): 909 - 918 .
TANG L , OOI B T . Locating and isolating DC faults in multi-terminal DC systems [J]. IEEE Transactions on Power Delivery , 2007 , 22 ( 3 ): 1877 - 1884 .
JIA K , WANG C , BI T , et al . Transient current waveform similarity based protection for flexible DC distribution system [J]. IEEE Transactions on Industrial Electronics , 2019 , 66 ( 12 ): 9301 - 9311 .
JIA K , XUAN Z , FENG T , et al . Transient high-frequency impedance comparison based protection for flexible DC distribution systems [J]. IEEE Transactions on Smart Grid , 2020 , 11 ( 1 ): 323 - 333 .
ZHENG Tao , WU Qiong , LÜ Wenxuan , et al . Research on protection scheme of flexible DC distribution grids based on DC current zero-crossing characteristics [J]. Power System Technology , 2020 , 44 ( 5 ): 1806 - 1815 .
LI Bin , HE Jiawei , LI Ye , et al . A novel solid-state circuit breaker with self-adapt fault current limiting capability for LVDC distribution network [J]. IEEE Transactions on Power Electronics , 2019 , 34 ( 4 ): 3516 - 3529 .
DAI Zhihui , GE Hongbo , CHEN Bingyan , et al . Line protection schemes for flexible medium voltage DC distribution networks [J]. Automation of Electric Power Systems , 2017 , 41 ( 17 ): 78 - 86 .
HE Jiawei , LI Bin , LI Ye , et al . A fast directional pilot protection scheme for the MMC-based MTDC grid [J]. Proceedings of the CSEE , 2017 , 37 ( 23 ): 6878 - 6887 .
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 .
WANG Congbo , JIA Ke , BI Tianshu , et al . Protection for flexible DC distribution system based on transient current waveform similarity identification [J]. Power System Technology , 2019 , 43 ( 10 ): 3823 - 3832 .
CHUL-HO N , CHUI-HWAN K , GI-HYEON G , et al . Development of protective schemes for hybrid AC/DC low-voltage distribution system [J]. International Journal of Electrical Power & Energy Systems , 2019 , 105 : 521 - 528 .
YEAP Y M , GEDDADA N , SATPATHI K , et al . Time and frequency-domain fault detection in a VSC-interfaced experimental DC test system [J]. IEEE Transactions on Industrial Informatics , 2018 , 14 ( 10 ): 4353 - 4364 .
SHENG Wanxing , LI Rui , LI Yue , et al . A preliminary study on voltage level sequence and typical network architecture of direct current distribution network [J]. Proceedings of the CSEE , 2016 , 36 ( 13 ): 3391 - 3403 .
WANG Junsheng , LIU Huanzhang . Pre-acceleration of protection for HVDC transmission lines [J]. Automation of Electric Power System , 2019 , 43 ( 9 ): 1 - 8 .
DUAN Jiandong , LI Zainana , WEI Zhaoyang , et al . A line accelerated protection scheme of flexible MVDC distribution system based on transient current derivative [J]. Electrical Power System Research , 2020 , 183 : 106269 .
BAI Yang , KONG Weigang , ZHANG Lihui , et al . Design of the low delay AFDX optical-electrical translator [J]. Electronic Technology , 2015 , 44 ( 7 ): 1 - 4 .
LI Bin , HE Jiawei , LI Ye , et al . A novel DCCB reclosing strategy for the flexible HVDC grid [J]. IEEE Transactions on Power Delivery , 2020 , 35 ( 1 ): 244 - 257 .