FOGI-QSG based control of multifunctional grid tied SECS

Abstract

This paper deals with a solar energy conversion system (SECS) interfaced with three phase grid using a fourth order generalized integrator quadrature signal generator (FOGI-QSG)based control algorithm, which helps to mitigate the power quality problems like power factor correction, load balancing, harmonics elimination and noise cancellation. The perturb and observe (P&O) based maximum power tracking point (MPPT) algorithm is used to extract the maximum power from solar photovoltaic (SPV) array. The reference voltage is obtained from MPPT algorithm which helps to maintain DC link voltage of a voltage source converter (VSC). The FOGI-QSG based control algorithm is an easily realizable without compromising accuracy. The control algorithm is validated experimentally on developed hardware in the laboratory. Total harmonic distortion of source current of distribution network has been found within limit according to an IEEE-519 standard at common coupling point.