The ANALYSIS OF A SOLAR POWER GENERATION SYSTEM

Abstract

This paper proposes a new seven level inverter with a solar power generation system, which is composed
of a dc-dc power converter and a new seven level inverter. The dc-dc power converter integrates a boost
converter and a transformer to convert the output voltage of the solar cell array into independent voltage
sources with multiple relationships. The most commonly used solar cell model is introduced and the
generalized PV model using Mat lab/simulink is developed. Taking the effect of solar intensity and cell
temperature, the characteristics of PV model are simulated. This model can be used for analysis of PV
characteristics and for simulation with Maximum power point tracking algorithms. This new seven level
inverter is configured using a capacitor selection circuit and a full bridge power converter. The capacitor
selection circuit converts the two output voltage sources of dc–dc power converter into a three-level dc
voltage, and the full-bridge power converter further converts this three-level dc voltage into a seven-level
ac voltage. In this way, the proposed solar power generation system generates a sinusoidal output current
that is in phase with the utility voltage and is fed into the utility. The salient features of the proposed
seven-level inverter are that only six power electronic switches are used, and only one power electronic
switch is switched at high frequency at any time.