Study on modeling & control of three phase quasi Z-source inverter for power conversion

This paper presents modeling and control of quasi Z-source inverter (qZSl) for a particular amount of dc to ac power conversion to supply isolated electrical load. Necessary analysis and design of qZSI is included in this paper. This qZSI is capable of supplying three phase, 50 Hz, 400 V, 50 KW power load. In this context voltage boosting (DC: 273V to AC: 400Vrms) and DC to AC power (50 KW) conversion are simultaneously done in one step. Hence suitable pulse width modulation (PWM) control signals are generated to control three-phase qZSI for applying into particular load mentioned above. Thus, this paper emphasizes on power handling capability of qZSI along with its voltage boosting action. This concept is validated by appropriate simulation study using MATLAB-SIMULINK 2014b software and PWM signals are also realized in hardware platform.