Design and Analysis of Solar Power Switched Inductor and Switched Capacitor for DC Distribution System

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. Index Terms: High step-up voltage gain, maximum power point tracking (MPPT), solar power optimizer (SPO)