This paper proposes a control strategy for the operation of solar energy generation integrated with grid. Boost converter is used to extract the maximum power from the available solar power. The buck converter and bi-directional DC/DC converter connected with common DC bus and it’s connected with different loads. MPPT algorithms have been used in PV systems to deliver the maximum available power to the load under changes of the solar insolation and ambient temperature. A variable perturbation size adaptive perturb and observe (P and O) maximum power point tracking (MPPT) algorithm is proposed to track the maximum peak power (MPP) under sudden changes in irradiance. The hysteresis current controller has implemented in bidirectional converter to control the real power with bidirectional power flow capability, which is integrated to the grid. The proposed control strategy improves the performance of the Photovoltaic system for a wide range of variations in solar irradiance condition with minimization of the complexity of a controller. Thus the PV system achieves higher reliability, good efficiency and better regulation, especially in bad weather conditions. Performance of the complete proposed system under different environmental conditions with different load availability is carried out in MATLAB and Sim power systems. Keywords: Photovoltaic array, bidirectional DC/DC converter, MPPT (Maximum Power Point Tracking), SEDC, MPP (Maximum Peak Power), SPWMCite this Article: B Mahalakshmi, C Kalaiarasan, S Nirmal Rajan. Hysteresis Current Control Based Grid Connected PV System by using Bidirectional DC-DC Converter. Journal of Thermal Engineering and Application. 2015; 2(1): 26–40p.
