Photovoltaic power injection to the grid with reactive power and harmonic compensation using a simple H bridge converter

This paper presents a study on the utilization of a single phase three-level bridge inverter to inject active power from a photovoltaic power source. Simultaneously, it compensates reactive power and harmonic current components, allowing power factor correction (PFC). An analysis on the design of passive elements, considering active and reactive power maximum values, is made. Additionally, the process of power injection is described in a straightforward way, whenever photovoltaic active power is available. Simulation results are presented to validate the design criteria, photovoltaic injection description, and PFC. A 5 kW-10 kvar system is proposed a case of study. Simulations show that the three functions can be made without intervening with each other.