A coordinated control strategy for fault ride-through of offshore wind power flexible DC grid-connected system

Zhaohui Zhang; Zhiyuan Xie; Ke Zhao; Yang Xu; Hui Fu; Yang Chen

doi:10.1117/12.3016884

15 January 2024 A coordinated control strategy for fault ride-through of offshore wind power flexible DC grid-connected system

Zhaohui Zhang, Zhiyuan Xie, Ke Zhao, Yang Xu, Hui Fu, Yang Chen

Author Affiliations +

Proceedings Volume 12983, Second International Conference on Electrical, Electronics, and Information Engineering (EEIE 2023); 129830B (2024) https://doi.org/10.1117/12.3016884
Event: Second International Conference on Electrical, Electronics, and Information Engineering (EEIE 2023), 2023, Wuhan, China

Abstract

In offshore wind power flexible DC grid-connected systems, the surplus power generated after an AC grid fault can lead to DC overvoltage, and the surplus power is generally consumed through the configuration of DC chopper. This paper analyzed the topological structure, design of parameters and the control method of the distributed DC chopper. By comparing the response curves of the traditional centralized DC chopper, it is shown that the distributed DC chopper has more ideal control effect. On the basis of this, the AC-voltage magnitude reduction method was designed based on the permanent magnet direct-drive wind turbine, and the FRT coordination control strategy was designed in combination with the distributed DC chopper, which can significantly reduce the capacity of DC chopper and the cost of system while ensuring FRT performance of system. Based on the Rudong project, the proposed coordinated control strategy is verified by the system model built in PSCAD/EMTDC.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhaohui Zhang, Zhiyuan Xie, Ke Zhao, Yang Xu, Hui Fu, and Yang Chen "A coordinated control strategy for fault ride-through of offshore wind power flexible DC grid-connected system", Proc. SPIE 12983, Second International Conference on Electrical, Electronics, and Information Engineering (EEIE 2023), 129830B (15 January 2024); https://doi.org/10.1117/12.3016884

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