Grid integration of single-phase single-stage SPV system using an Active Noise Isolation based control algorithm

This paper presents an active noise isolation (ANI) based control algorithm for single-phase single-stage solar photovoltaic (SPV) system connected to the AC grid. An ANI based algorithm used to control a voltage source inverter (VSI) which performs load compensation, harmonics mitigation, feeding solar power into the AC grid and many other power qualities issues. The proposed system comprises SPV array, single phase H-bridge VSI, nonlinear load and AC grid. The P&O (Perturb and Observe) algorithm is used for maximum power point tracking (MPPT) of SPV array at different environmental conditions. The proposed control algorithm has additional features by adding the new loop inside the ANI structure for the elimination of a DC component present in the input signal and is easy to implement. The behavior of presented SPV system is studied on a laboratory prototype under varying load and environmental conditions.