Comparative Study of Modulation Techniques to Reduce Leakage Current in a Quadratic-Boost Split Source Inverter for Photovoltaic Systems

This article presents a leakage current analysis when different PWM techniques are used in the Quadratic-Boost Split Source Inverter (QBSSI). It is known that leakage current is a concern in transformerless photovoltaic generation systems. Therefore, results are presented showing good performance in reducing leakage current while the converter presents an ideal quadratic boost gain for photovoltaic applications. Simulation results are presented, in addition to a THD analysis of the currents injected into the power grid. Moreover, the common mode voltage results were presented as well as the leakage current analysis by varying the duty cycle.