非对称故障下风电场接入MMC-HVDC系统的弱电网特性分析与电压支撑增强运行模式选择

The voltage support functions have been mandated in grid codes to help wind turbines (WTs) ride through ac faults. In a modular multilevel converter-based high voltage dc (MMC-HVDC) system for wind farm integration, particularly in scenarios where there is no conventional synchronous generator at the sending end, the MMC adopts voltage-frequency control to form an ac grid. Such grid, however, is f...