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Title: | Impact of different AC voltage control modes of wind-farm-side MMC on stability of MMC-HVDC with offshore wind farms | Authors: | Lin, HF Xue, T Lyu, J Cai, X |
Issue Date: | Sep-2023 | Source: | Journal of modern power systems and clean energy, Sept 2023, v. 11, no. 5, p. 1687-1699 | Abstract: | Wind-farm-side modular multilevel converters (WFMMCs) used in modular multilevel converter based high-voltage direct current (MMC-HVDC) transmission systems must be able to control the AC grid voltage in offshore wind farms. Different AC voltage control strategies can significantly affect the dynamic characteristics of WFMMCs. However, existing studies have not provided a general methodology of controller parameter design, and few comparative studies have been conducted on control performance under varying operating conditions as well as the effects of different AC voltage control modes (AVCMs) on the stability of MMC-HVDCs with offshore wind farms. This paper provides a controller parameter design method for AVCMs, which is tested in various operating scenarios. Sequence impedance models of offshore wind farms and WFMMCs under different AVCMs are then developed. The effects of AVCMs on the small-signal stability of the interconnected system are then analyzed and compared using the impedance-based method. Finally, case studies are conducted on a practical MMC-HVDC system with offshore wind farms to verify the theoretical analysis. | Keywords: | Voltage control Wind farms Power system stability Stability criteria Interconnected systems Impedance Transfer functions Offshore wind farm Modular multilevel converter based high-voltage direct current (MMC-HVDC) AC voltage control Stability Dynamic response characteristics |
Publisher: | Springer | Journal: | Journal of modern power systems and clean energy | ISSN: | 2196-5625 | EISSN: | 2196-5420 | DOI: | 10.35833/MPCE.2022.000363 | Rights: | This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). The following publication H. Lin, T. Xue, J. Lyu and X. Cai, "Impact of Different AC Voltage Control Modes of Wind-farm-side MMC on Stability of MMC-HVDC with Offshore Wind Farms," in Journal of Modern Power Systems and Clean Energy, vol. 11, no. 5, pp. 1687-1699, September 2023 is available at https://dx.doi.org/10.35833/MPCE.2022.000363. |
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