MPPT Algorithms with LCL Filter for Grid Connected PV System

Abstract

The sum of all harmonic components of a waveform relative to the fundamental component of waveform is termed as total harmonic distortion (THD). In this paper we have compared THD of photovoltaic (PV) systems connected with a grid for four different MPPT algorithms which includes artificial neural network (ANN), incremental conductance (INC), perturb and observe (P&O), and fuzzy logic control (FLC). The simulation results clearly present the difference in THD among all four MPPT algorithms. We have also designed a three phase LCL filters to filter out the harmonics in the output signal of the system. These are the specially designed filters to eliminate the harmonics with improved performance as well as it is cost effective and are smaller in size because of lesser values of inductor and capacitors in it.