Impact of Different AC Voltage Control Modes of Wind-farm-side MMC on Stability of MMC-HVDC with Offshore Wind Farms

• DOI: 10.35833/mpce.2022.000363
• Publication Date: 2023-09-21T01:10:18Z
• Authors: Hongfei Lin; Tao Xue; Jing Lyu; Xu Cai
• Keywords: High-voltage direct current; Transmission system

Wind-farm-side modular multilevel converters (WFMMCs) used in converter based high-voltage direct current (MMC-HVDC) transmission systems must be able to control the AC grid voltage offshore wind farms. Different strategies can significantly affect dynamic characteristics of WFMMCs. However, existing studies have not provided a general methodology controller parameter design, and few comparative been conducted on performance under varying operating conditions as well effects different modes (AVCMs) stability MMC-HVDCs with This paper provides design method for AVCMs, which is tested various scenarios. Sequence impedance models farms WFMMCs AVCMs are then developed. The small-signal interconnected system analyzed compared using impedance-based method. Finally, case practical MMC-HVDC verify theoretical analysis.