Hybrid Clamped Multi Level Inverters for Grid Connected Solar Electronics

In this paper the simplest PV system consists of multiple solar cells connected to form a PV module commercially available modules range in power from 10 watts to 300 watts. One or more of these modules are connected to an inverter which convert’s direct-current (DC) output of other modules into alternating current (AC). Optionally, batteries may provide energy storage or backup power in case of a power interrupting or outage on the grid. the interface between Photovoltaic power supply and the grid rely on the centralized inverter technology A complete grid-tied solar system consists roof mounted solar modules, wiring, and grid tie inverter. The inverter used here is a hybrid clamped inverter. In this topology, the dc-link capacitor voltages can be balanced without additional circuitry or separated dc voltage sources, regardless of load characteristics. It can be used in real and reactive power conversion applications. The topology structure, operating principle and self-voltage balancing ability are analyzed. The PWM control method called higher and lower carrier cells alternative phase opposition PWM (HLCCAPOPWM) is employed. Comparision of various PWM techniques for the hybrid clamped inverter is done. Simulation results are also presented.