Grid-Side Structure of PMSG: Inverter, PWM Generator, and Voltage Vector Control

The grid-side structure of PMSG includes an inverter, PWM generator, and voltage vector control system. The control architecture implements dual closed-loop regulation featuring an outer voltage loop and an inner current loop. When designing the current controller, developers must ensure zero steady-state error in current tracking while maintaining strict limitations on current overshoot during dynamic adjustments - a critical requirement for permanent magnet direct-drive wind power systems. The controller typically employs PI regulators with anti-windup protection, where the proportional and integral gains are tuned using frequency-domain analysis to meet both static and dynamic performance specifications. Additionally, to ensure current quality and system stability in PMSG-based wind generation, multiple control strategies must be integrated, including voltage regulation, rotor position tracking, and current control algorithms. These strategies often involve coordinate transformation (abc/dq conversion), space vector modulation (SVM) techniques, and maximum power point tracking (MPPT) algorithms to enhance system performance and efficiency while guaranteeing operational reliability and stability.