A Solar PV Battery Connected With the Grid for the Purpose of Voltage Regulation

Abstract

Multi-port converter design and analysis presents one of the most intriguing challenges in the incorporation of renewables in the power grid. Choice of topology is of paramount importance to improve the power conditioning. To this effect, the integrated C` uk topology achieves multiple objectives : low EMI, low component count and power management, reduction of filter capacitor requirement, high efficiency. This is achieved by integrating all the magnetic components on a single core, and addition of soft-switching capability thereof. This thesis revisits the concept of integrated magnetics and formulates an elegant solution procedure to the problem of zero-ripple. It investigates the idea of utilizing the concept of a coupled-inductor filter on a three-port converter and removes the need for an external filter, thereby almost introducing an effective DC-DC transformer. The simulation results are presented using MATLAB and Simulink along with solar cell voltage regulator. Additionally, some FEM results are added for the reduced three-winding structure. The validation of some design parameters are also discussed.