Design of z-source converter dc/dc for a photovoltaic system connected to dc microgrid

This paper proposes the research and implementation of DC/DC ZSC operating in CCM, applied on photovoltaic system for DC microgrid. The DC microgrid consists of PV panel, wind turbine, battery, DC loads and a grid-connected inverter system. To ensure the stability of a DC microgrid, the power flow within the DC microgrid must be balanced at all times to maintain a constant DC bus voltage. For such aim, PV array are connected to DC/DC ZSC input and it provides high gain voltage from 221 Vdc to 400Vdc in its output connected to DC microgrid bus. As the power supplied by PV Panel depends on the load and the climatic conditions (insolation and temperature), extracting maximum power and converter are required. So, two different types of MPPT techniques controls are proposed Perturb and observe (P&O) and Fuzzy Logic Control (FLC). This paper focuses mostly on P&O and through PSIM simulations are presented the behavior of system attending that output power is 1.38 kW.