A Comparative Analysis & Simulation of Phase Locked Loop for a Grid synchronized Photovoltaic System

This paper presents an overview and comparative study of PLL and non-PLL methods for synchronization of Distributed Generations in an active grid. The merits of Phased locked loop methods over traditional Non-PLL methods are discussed with the technical reasons why PLL methods are more popular and accurate in the tracking of phase angle is explained. PLL methods like Enhanced Transfer delay, hybrid PLL and Decoupled double are further studied, classified and compared by one another and a thorough study on Phase locked loop, its working methodology and Simulink configurations are portrayed. Our study follows the configuration of distributed solar generations and its penetration in a low voltage distribution network with study being emphasized on construction of a photovoltaic inverter. Furthermore, working of grid tied PV inverter and Phase locked loop are simulated under MATLAB environment. Outcomes are then analyzed and discussed in the results and conclusion. Main objective of this study is to analyze the effectiveness of PLL methods in synchronizing distributed generation units into the active grid so that future DG plants can be effectively synchronized. Eventually, it will not only help in decreasing the scarcity of energy but also boost the utilization of renewable and eco-friendly sources as a raw energy for the mass production of electricity