A Control Strategy for Off-Grid Solar Photovoltaic Power System Based on MPPT Algorithm

Abstract

Off-grid solar photovoltaic (PV) power system characteristics are used widely in many far-away areas during theses years. The new control strategy employs Maximum Power Point Tracking (MPPT) algorithm. The maximum power point tracker is a high efficiency boost converter, whose function is like an optimal electrical load for solar PV cells, and converts the power to voltage or current which is appropriate in any situation. MPPT through perturbation and observation control method can trace the maximum power point, then it will set the operating point. The simulations show that in the off-grid solar PV power system can search and trace the maximum power point automatically by using this strategy. Moreover, this control strategy is comparatively easy, and has high practical value.