This paper discusses a power analysis of the two-stage current source converter for single-phase grid-connected photovoltaic system applications. The aim of this research is to analyze the active powers of the converter. The proposed two stage power conversion topologies are consisting of a dc-dc converter and a single-phase current source inverter. This dc-dc converter operated with a phase shifted PWM technique, which produced three levels current on the output dc current, and current source inverter outputting a low frequency for injecting a sinusoidal current flowing into the power grid. Simulation results of the proposed system are demonstrate and discussed. As results, the proposed method is good conformation with the theoretical analysis in which the power factor and efficiency.

This paper presents a detailed analysis of a sevenlevel single-phase current source inverter for grid-connection systems. The aim of this research was to control high power factor operation, injecting a sinusoidal current flowing into the utility grid. The proposed two-stage power conversion strategies consisted of a dc-dc multilevel converter and a current source inverter, which operated with high switching and line frequency. A proposed topology is used to produce a seven-level current output with a phase-shifted PWM technique. A simple method is presented to improve the total harmonic distortion and power factor requirement. The feasibility of the proposed method was verified by simulation and experimental results.