PI Control Based DC Link Voltage Controller for Grid Integrated Domestic Photo Voltaic Systems

Abstract

The increasing energy demand and finite reserve for fossil fuel sources have led the humankind to rely on renewable energy sources. The availability of solar energy in large quantities and the increased environmental awareness among the users boosted its popularity. Grid integration of renewable source is preferred over the islanded mode of operation as there is no need for additional energy storage devices. This paper presents a proportional integral control based DC link voltage controller for grid-integrated domestic photovoltaic systems. Incremental Conductance method to extract maximum power from solar PV system, instantaneous pq theory based dual STF for fundamental component extraction, hysteresis current control method for generation of switching pulses to the inverter are the added features of this work. The grid integrated Solar PV system along with control features is modelled and simulated in MATLAB/Simulink platform. Numerical simulations are done for various system conditions. The results of the power flow study and harmonic analysis are reviewed and summarised. � 2019 IEEE.