Cascaded Deadbeat Predictive Power Control for High-speed PMSG under Wide Speed Range

In order to improve the dynamic and steady-state performance of the traditional PI control for high-speed surface-mounted PMSG, a cascaded model predictive control consisted of deadbeat predictive power control (DPPC) and deadbeat predictive current control (DPCC) is proposed in this paper. Firstly, the model between PMSG and load is obtained by the small-signal analysis. Then, according to the above discretized model and the idea of deadbeat model predictive control, the DPCC inner loop and DPPC outer loop is designed. In addition, the operating constraints of PMSG are analyzed. To adapt to wide speed range, field weaking control based on voltage feedback is introduced to the above cascaded control. The simulation results verify the effectiveness of field weakening control and improvement of the dynamic and steady-state performance of the cascaded deadbeat predictive control compared with the traditional PI control strategy.