ABSTRACT
In this chapter, the design aspects of a three-phase grid-connected inverter operated using a photovoltaic (PV) system are discussed. To enhance the precision of the design process, basic elements of the PV system, PV system configuration types, current situation of PV technology, PV inverter types for each type of PV configuration, and advantages and specifications of SiC MOSFETs are considered. Furthermore, the operating principles, analysis, and control of grid-connected three-phase inverters are explained. Control techniques and PWM methods used in three-phase voltage source inverters are explained and compared. Moreover, a step-by-step design procedure of a grid-connected three-phase inverter is presented. Here, the optimum switching frequency, DC link voltage and capacitance selection, output LCL filter design, control loop implementation, and loss and efficiency calculations are analyzed.
