Hybrid System of Photovoltaic-Battery-Super Capacitor and Control for Isolated DC Load

Abstract

This paper contains a hybrid system which includes Photovoltaic (PV), Battery, super capacitor (SC) to meet isolated load demand. The PV is the main energy source, whereas battery and SC are storage devices to rise the reliability of the system. All sources are connected to DC link by different DC-DC converters. To keep the battery always charged, SC is used. A power flow control scheme adjust their variable DC voltage to Bus voltage by means of using these converters. The whole energy management principle has been validated in MATLAB/SIMUINK with variable load demand and different solar irradiance.

Keywords: Photovoltaic, Battery, Power flow Control Stretergy, Incremental Conductance(IC) method for MPPT