Disturbance Handling and Efficiency Optimization for SPWM-Three Phase Inverter by Using PID Controller System

The importance of studying inverters in electrical systems is highlighted by their role as one of the most important electronic power devices used in numerous applications in industry, as well as in generation, transmission, and distribution, most notably in renewable energy generation systems. An inverter converts direct current power into alternating current power to power loads or connect solar energy sources to the grid. Inverters are built using electronic switches such as thyristors or transistors such as IGPTs and MOSFET transistors. A number of switches are used to build the inverter, depending on the type of inverter, whether single-phase or three-phase. It can also be half-wave or full-wave. The current study proposed a bridge inverter consisting of six electronic switches of the IGBT transistor type arranged in two rows and three columns. To operate the inverter, pulse width modulation (PWM) technology was used to regulate the inverter operation and obtain the required output to supply a three-phase resistive load. In addition, an LC filter was connected to obtain a pure sine wave. Due to the different and variable operating conditions and to overcome disturbances, a conventional control unit was added to improve performance and raise the efficiency of the system. After conducting the proposed tests, the possibility of obtaining an inverter that operates with an efficient system to cover the load requirements under variable operating conditions was verified.