A Novel Multi-port DC Circuit Breaker and Its Application in Protection of DC Power Grid

被引：0
|
作者：
Song B. [1 ]
Zhao X. [1 ]
Zhao C. [1 ]
Xu J. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 01期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
DC circuit breaker; DC grid; Energy transfer; Multi-port; Thyristor;
D O I：
10.7500/AEPS20190107004
中图分类号：
学科分类号：
摘要：
In the DC grid, the use of high voltage DC circuit breakers to remove faulty lines can effectively eliminate DC faults, but the existing DC breakers have high investment costs and redundant power electronics during normal system operation. A novel multi-port DC circuit breaker (MP-DCCB) topology is proposed in this paper, which uses a single main circuit breaker to protect multiple DC lines. Thyristors with large current capacity are utilized as control unit to selectively cut off the faulty line between main circuit breaker and DC lines. Then, an energy transfer path which is capable of absorbing the energy of the current limiting inductor is designed to reduce the energy that the arrester needs to absorb, the open circuit of MP-DCCB, energy consumption, control method of reclosing stage and electrical processes are theoretically analyzed, and an equivalent mathematical model is established to study the relationship between voltage, current stress, economic characteristics and key parameters of MP-DCCB. The four-terminal bipolar DC grid is built in PSCAD/EMTDC for simulation verification. MP-DCCB can effectively reduce the investment cost of circuit breakers and has the engineering value applied to flexible DC grids. © 2020 Automation of Electric Power Systems Press.
引用
收藏
页码：160 / 167
页数：7
相关论文
共 21 条
  • [1] Yan S., Luo X., He Z., Prospect of DC grid core equipment and key technologies, Automation of Electric Power Systems, 43, 3, pp. 205-216, (2019)
  • [2] Zhao J., Zhao C., Lyu Y., Et al., Timing coordination method of high voltage DC circuit breaker for DC grid protection, Automation of Electric Power Systems, 43, 11, pp. 121-127, (2019)
  • [3] Li B., He J., Li Y., Et al., DC fault protection strategy for the flexible multi-terminal DC system, Proceedings of the CSEE, 36, 17, pp. 4627-4637, (2016)
  • [4] Li S., Zhao C., Xu J., Et al., A new type of current limiting high voltage DC circuit breaker topology, Transactions of China Electrotechnical Society, 32, 17, pp. 102-110, (2017)
  • [5] Mokhberdoran A., Carvalho A., Silva N., Et al., Application study of superconducting fault current limiters in meshed HVDC grids protected by fast protection relays, Electric Power Systems Research, 143, pp. 292-302, (2017)
  • [6] Zhu S., Zhao C., Li C., Et al., Optimization configuration of DC grid current limiting reactor considering fault current limiter action, Automation of Electric Power Systems, 42, 15, pp. 142-149, (2018)
  • [7] Wang Y., Yuan Z., Wen W., Et al., Generalised protection strategy for HB-MMC-MTDC systems with RL-FCL under DC faults, IET Generation, Transmission & Distribution, 12, 5, pp. 1231-1239, (2018)
  • [8] Ye H., Chen W., Xue C., Et al., Combination device for power flow control and short circuit control of DC power grid, Automation of Electric Power Systems, 42, 23, pp. 112-121, (2018)
  • [9] Zhou J., Zhao C., Li C., Et al., Multi-terminal flexible DC grid boundary protection scheme based on DC reactor voltage, Automation of Electric Power Systems, 41, 19, pp. 89-94, (2017)
  • [10] Wen W., Huang Y., Sun Y., Et al., Research on current commutation measures for hybrid DC circuit breakers, IEEE Transactions on Power Delivery, 31, 4, pp. 1456-1463, (2016)
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