Linear coefficient function based control approach for single stage SPV system integrated to three phase distribution system

Abstract

This study proposes a single stage solar photovoltaic (SPV) system utilising a linear coefficient function (LCF) based control approach. The main aim is to develop a cost effective, reliable and efficient SPV system. For estimation of peak power from the SPV array, an adaptive perturb and observe based approach is utilised. Whereas, to control the gating signals of the voltage source converter, a linear coefficient function based approach is used. The proposed system injects the estimated power from the SPV array to the grid. Moreover, it is also used for mitigation of harmonics of the load current, unity power factor operation and load balancing. The proposed SPV system has used a SPV feed forward term to reduce the burden on the proportional integral controller and improves the dynamic response under atmospheric changes. The SPV system is modelled and experimentally verified the control under different operating conditions.