Control of Solar-battery storage based Micro-grid

With the advancements made in renewable energy systems and eventual reduction in cost, renewable sources such as solar and wind are gaining attention. Solar power being abundantly available promises a sustainable solution to growing demands. However, stochastic nature of solar irradiance presents operational challenges. In order to address the need of for proper coordination, this paper presents control of a Solar and battery storage based micro-grid in grid connected mode. PV array is equipped with maximum power point tracking (MPPT) control. The micro-grid is interspersed with battery storage along with charge controller to maintain uncertain generation from solar generators. The grid-side inverter is operated in P-Q control mode. The model has been formulated in MATLAB-Simulink environment. The model has been investigated for two cases (i) Constant load, variable irradiance (ii) Variable load, variable irradiance. The results evidently establish the efficacy of control technique in maintaining voltage, frequency and power balance at PCC.