Dual-Dimensional Improved VSG Control Strategy for Multiphase Wind Power System Based on MMC

doi:10.3969/j.issn.1008-0198.2025.04.007

Abstract

Abstract: Focusing on the multiphase wind power generation system based on modular multilevel converter (MMC), this paper studies the insufficient frequency regulation ability and power oscillation caused by the lack of moment of inertia of traditional MMC, and proposes a dual-dimensional improved VSG control strategy. The frequency output characteristics are optimized through the real-time compensation mechanism of active power deviation. A parameter dynamic adjustment strategy based on the operating conditions is designed to realize the adaptive matching of active power-frequency control parameters, which effectively suppresses power oscillation and frequency fluctuation in the transient process. A simulation model is built based on MATLAB/Simulink platform. The simulation results show that the proposed strategy has better effect in terms of dynamic response speed and frequency stability compared with the traditional control method.

Key words: multiphase wind power generation, modular multilevel converter(MMC), virtual synchronous generator, active-frequency control, parameter adaptation

CLC Number:

TM614

ZHANG Wei, LI Jianying, ZHONG Ding’ai, ZHANG Mai, CHENG Zhun. Dual-Dimensional Improved VSG Control Strategy for Multiphase Wind Power System Based on MMC[J]. Hunan Electric Power, 2025, 45(4): 39-48.

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