Parameter Design and Predictive Anti-Windup of Double Closed-Loop Control for DC Three-Stage Generator in More Electric Aircraft

DC three-stage generator (TSG) has been widely adopted as the main power source in aviation high-voltage dc power system. With the evolution towards more electric aircraft, it is crucial to regulate the output voltage of the DC-TSG under complex operating conditions with numerous nonlinear loads. This paper proposes a step-by-step parameter design method for double closed-loop control of the DC-TSG system. Based on the system model, PI controller characteristics, and dynamic and stability requirements, a feasible region is identified for key parameters, enabling fast and easy tuning while ensuring near-optimal control performance. Moreover, a predictive anti-windup method is proposed to eliminate integrator windup in PI controllers used in double closed-loop control systems. The proposed parameters design method does not require repeated trial-and-error and the predictive anti-windup method is simple to implement. Finally, the effectiveness and advantages of the proposed methods are verified by simulations and experiments.