The ANALYSIS OF DC DISTRIBUTION SYSTEM USING COUPLED INDUCTOR AND SWITCHED CAPACITOR

Abstract

This paper proposes a high step-up solar power optimizer (SPO) that efficiently harvests maximum energy from a photovoltaic (PV) panel then outputs energy to a dc-microgrid. Its structure switched inductor and switched capacitor technologies to realize high step-up voltage gain. The leakage inductance energy of the coupled inductor can be recycled to re- duce voltage stress and power losses. A low voltage rating and low-conduction resistance switch improves system efficiency by employing the incremental conductance method for the maximum power point tracking (MPPT) algorithm. Because of its high tracking accuracy, the method is widely used in the energy harvesting of PV systems. laboratory prototypes of the proposed SPO that have an input voltage range of 40 to 60V and a maximum PV output power of 400 V/300 W are applied. This paper proposes use of a high step up solar power optimizer (SPO) that efficiently reaps maximum energy taken from photo voltaic (PV) panel fed to a DC-micro grid. The proposed converter employs a switched capacitor and coupled inductor, by varying duty ratio and turns ratios generally we want for the coupled inductor to achieve high step up voltage conversion; The leakage inductance energy of the coupled inductor is efficiently to the load and reduce voltage stress. A rating of low voltage and low-conduction resistance switch makes the system efficiency by employing the perturb and observe (P and O) method for the maximum power point tracking the operating principles and continuous and discontinuous modes, as well as the voltage and current stress of the active switch components are investigate.