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Power Transfer Control Strategy Based on True Bipolar MMC-MTDC System

Author

Listed:
  • Can Ding

    (College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Xiaojian Tian

    (College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Taiping Nie

    (College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Zhao Yuan

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

The true bipolar modular multilevel converter-based multi-terminal direct current (MMC-MTDC) DC transmission line is prone to single-pole grounding fault, which may cause overload and overcurrent of the non-fault DC line with fault poles, resulting in system protection misoperation and system collapse. Therefore, the power transfer control strategy should be adopted to improve system stability. In addition, considering that the commutator stations of true bipolar MMC-MTDC system may have unipolar faults, it is necessary to adopt the control strategy of inter-pole power transfer or inter-station power transfer to improve the transmission capacity of the system under fault conditions. In this paper, a power transfer control strategy is proposed, which is widely applicable to MMC-MTDC system. In the case of line fault, the power transfer takes into account the line power margin and the power margin of converter station. The inter-pole power transfer is better than the inter-station power transfer under the converter station fault condition, and the inter-station power transfer takes into account the priority of the power margin of the converter station. At the same time, based on the Zhangbei four-terminal flexible direct current transmission project, the Zhangbei four-terminal flexible direct current transmission system is built by using PSCAD/EMTDC, and the flexibility and effectiveness of the proposed strategy are verified by simulation.

Suggested Citation

  • Can Ding & Xiaojian Tian & Taiping Nie & Zhao Yuan, 2021. "Power Transfer Control Strategy Based on True Bipolar MMC-MTDC System," Energies, MDPI, vol. 14(24), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8306-:d:698769
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    References listed on IDEAS

    as
    1. Waqar Uddin & Tiago D. C. Busarello & Kamran Zeb & Muhammad Adil Khan & Anil Kumar Yedluri & Hee-Je Kim, 2021. "Control Strategy Based on Arm-Level Control for Output and Circulating Current of MMC in Stationary Reference Frame," Energies, MDPI, vol. 14(14), pages 1-20, July.
    2. Tarek Abedin & M. Shahadat Hossain Lipu & Mahammad A. Hannan & Pin Jern Ker & Safwan A. Rahman & Chong Tak Yaw & Sieh K. Tiong & Kashem M. Muttaqi, 2021. "Dynamic Modeling of HVDC for Power System Stability Assessment: A Review, Issues, and Recommendations," Energies, MDPI, vol. 14(16), pages 1-25, August.
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    Cited by:

    1. Chuan Du & Qingzhi Zhang & Shuai Cao, 2022. "A Smart Fault-Tackling Strategy Based on PFTE for AC Three-Phase-to-Ground Faults in the Multi-Terminal HVDC Wind Power Integration System: Further Foundings," Energies, MDPI, vol. 15(3), pages 1-22, January.

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