Hybrid Solar PV and Wind-Driven PMSG System with Single DC-DC Converter and Hysteresis Inverter

Abstract

Due to shortage of fossil fuels and the bad environmental effects, a lot of research is going on renewable energy sources. By the invention of high grade PV cells and better MPPT technique PV system is largely utilised now a days. To make it more reliable PV along with wind generator is used as a hybrid system. Many techniques are used to extract the maximum power from both the sources. Here Perturb and Observe method is used with little modification.
In conventional hybrid system we use two dc-dc converter, i.e one DC-DC converter for each energy source. But here instead of two DC-DC converter, one DC-Dc converter is used. Both the sources are connected to a common Dc bus whose voltage is controlled by MPPT algorithm and Boost converter. By minimising the no of converter the loss in the circuit is reduced and hence the efficiency is increased. The energy is converted to ac by hysteresis controlled inverter and then connected to grid. The above method is modelled and simulated in Simulink/matlab and the results are verified.