Output voltage PID control of three-phase Z-source inverter by detection of output voltage and input DC voltage

출력전압과 입력직류전압 검출에 의한 3상 Z-소스 인버터의 출력전압 PID 제어

The paper proposes a close loop control algorithm for Z-source inverter. The algorithm is realized by PWM duty ratio control in order to improve the output voltage to it's desired level. The controller consist of the output voltage PID controller and DC input voltage P controller. Using the DQ coordinate transformation simplify the controller design. The PSIM simulation results verify the validity by means of comparing the system with or without compensation and estimating if the system has output consistency function when ZSI's load and input voltage value changing.