A Transient Adaptive Control Strategy for MC-PMSG Considering Both Current Limiting and Reactive Voltage Active Support

The matching control permanent magnet synchronous generator (MC-PMSG) will experience transient overcurrent, reactive voltage support instability, and a loss of voltage source characteristics during grid faults. Consequently, it is challenging to comprehensively tackle the above problems using the existing analysis and control methods. To address this issue, this study first establishes an equivalent circuit model of the MC-PMSG, clarifies the influencing factors of steady-state and transient current components based on the generation mechanism of transient current, and analyzes and reveals the influencing factors of transient reactive voltage support based on the equivalent circuit model. Subsequently, by utilizing the influencing factors, combining the reactive voltage support criterion, and considering the voltage source characteristics, a transient adaptive control strategy for MC-PMSG is proposed to account for current limitation and reactive voltage support, which effectively improves the transient current control capability and the reactive voltage support characteristics during grid faults, while preserving the voltage source characteristics of the MC-PMSG. Finally, the correctness of the mechanism and the effectiveness of the proposed control method are verified in detail through MATLAB/Simulink simulations.