A Real-Time Environment Modelling and Power Quality Analysis of Grid-connected PV System using Typhoon HIL

Renewable energy is playing a major role in present energy needs. This is also desirable due to the emerging demand for reducing greenhouse gases emission. The proposed work aims to model a three-phase grid-connected photovoltaic (PV) system in a real-time environment and analyse the power quality issues present in it. The work focuses on a string of PV modules that is optimized for maximum power transfer. A two-stage model is implemented where a boost converter is used integrated with maximum power point tracking (MPPT) algorithm. The output from boost converter is given to inverter which is tied with the grid using a phase-locked loop circuit. An uncoupled Watt-VAR control methodology is implemented for controlling the flow of injected power into the grid. Various PI controllers are tuned to give proper outcomes. This is followed by a mathematical analysis of simulated results. The validity of the proposed model is verified by the real-time simulation in Typhoon HIL software.