Design and Implementation of 3-Phase 2-Stage Grid-Connected Solar PV System

K. Sravani; K Suman

K. Sravani M.Tech Student, CVR College of Engineering, EEE Department, Hyderabad, India.
K Suman Asst.Professor, CVR College of Engineering, EEE Department, Hyderabad, India.

Abstract

Solar Photo Voltaic (SPV) system is categorized under Distributed generation to meet the demand of power for load variations, as it also helps in assisting the existing power system. In this paper, Standalone PV system is interfaced to three phase grid which includes PV array, Perturb and Observe (P and O) Maximum Power Point Tracking (MPPT) technique used to track maximum power from PV array and also for the adjustment of Duty Cycle for giving switching pulses to High level switch of Boost Converter. 2-level Inverter is used for DC to AC conversion with Pulse-Width Modulation (PWM) control. Phase-Lock-Loop (PLL) technique is implemented to synchronize the Standalone PV system with grid at certain phase angle and frequency. Control circuit is designed to supply active and reactive power to load by standalone PV system and grid according to load variations. The overall system is simulated in Matlab software for outputs.