Operation and Control of Non-isolated Interleaved Bidirectional DC-DC Converter Integrated with Solar PV system

The renewable energy sources supplying power to the microgrid can have fluctuating power characteristics depending on the environmental conditions. As renewable sources and connected loads have varying power nature, voltage instability conditions arises. To provide a stable voltage at a nominal level as per the standards is the main concern of any power supply network. This paper focuses on Non-isolated Bidirectional Interleaved DC- DC Converter (NIBIC) with battery storage. The NIBIC is controlled based on the voltage of the DC bus, connected to photovoltaic sources with maximum power point tracking technique (MPPT) via boost converter and load. The control circuit of bidirectional DC-DC converter includes current and voltage loop for operating the converter under different operating modes. This paper elaborates the operation of the system in the varying load conditions as well as in the varying irradiance conditions. The simulation model is built in Simulink (MATLAB) environment and the results of the simulation shows the effectiveness of the control strategy.