Study of Three-Phase Grid Connected PV System with Adjustive DC-Link Voltage

Abstract

In this paper the proposed system mainly uses an Adjustive DC link voltage that makes adjust the reference DC link voltage according to the variation in the CPI voltage. To reduce switching power losses, Adjustive DC link voltage control is used. FFT is used to better improvement of dynamic response. This proposed system can be evaluated like when grid voltage is high then Adjustive DC link voltage will also be high so that sinusoidal grid current will be decreases with increasing the DC link voltage and vice-verse. This system is considered to be good, when at under voltage and normal voltage at CPI. The experimental range of variation of voltage is about ±15% of the nominal voltage. 1.41% is the Total harmonic Distortion of grid currents when Incremental Conductance is considered along with Boost converter and MPP technique and PI controller Inverter is also used. Due to variation in voltage, system avoids the switching power or generation loss. All simulations of this proposed system is carried out in MATLAB.