Predictive direct power control for permanent magnet linear generator side converter

Solar thermal electric power generation devices are a rapidly growing interest worldwide for the potential to harness a sustainable and renewable energy source. This paper proposes an improved predictive direct power control(P-DPC) strategy for the permanent magnet linear generator(PMLG) side converter of solar dish/stirling power generation system. As a deadbeat scheme, the P-DPC is to eliminate the output voltage frequency fluctuation. The time delay problem of traditional direct power control can also be avoided. Based on the mathematical model of PMLG system, the P-DPC calculates the expected voltage vector according to the instantaneous power, back-EMF reference and feedback values of PMLG. And then the voltage vectors are transformed into switch signals with space vector pulse width modulation(SVPWM) model. The effectiveness of the proposed control strategy is verified by the simulation results of the prototype system.