Design and Performance Evaluation of Three-Phase Grid-Tied Solar Power Generation System Using STF based Algorithm

This article presents a dual-stage three-phase grid interfaced solar photovoltaic power generation (SPPG) system with the proposed self-tuning filter (STF) assisted control of a voltage source converter (VSC). The complete system design comprises a solar photovoltaic (SPV) array, DCDC boost converter, VSC, and linear/non-linear loads. VSC is integrated with the SPV array to meet the active power requirement of the load, and, if available, surplus power from the array is transferred to the grid. The control approach aims to harvest the optimal power from the SPV system with improvement in power quality (PQ) issues, particularly harmonic rejection and power factor correction. The reference and sensed grid currents are utilized in the current controller to effectuate the switching operation of the VSC. The performance of the proposed STF control approach is tested under varied scenarios to assess the efficacy of the control algorithm. The extensive simulation study and comparative analysis with popular classical and adaptive control techniques are presented. The proposed system performs superior in enhancing the power quality at the grid side. The simulation analysis is carried out in the MATLAB/Simulink environment.