A New Control Strategy for Voltage-Type PWM Inverter to Realize Zero Steady-State Control Error

In this paper , a new simple control strategy for the output voltage of voltage-type pulse width modulation (PWM) inverter which can eliminate the steady-state control error completely is proposed. In the proposed control system, a resonant element implemented by a digital signal processor (DSP) is introduced as a feedback controller. The resonant element exhibits a function similar to an integrator for the fundamental frequency component. Thus, it can eliminate the steady-state control error completely. The principle of the proposed control method is discussed, and its effectiveness is shown theoretically. To confirm the effectiveness of the proposed control method, some simulation testing are shown.