Control of Interlinking Converter for Adaptive Operation of Hybrid Microgrid

This work presents control of interlinking converter for adaptive operation of hybrid microgrid. The hybrid microgrid (HMG) consists of canal based small hydro generation combined with solar panel tied at AC bus. A battery-based energy storage unit (ESU) is used, that balances the DC bus voltage whereas the interlinking converter (ILC) balances the AC bus frequency and voltage in the off-grid scenarios. Besides, multimode operation of interlinking converter is also tabulated. In the grid connected mode, the voltages at the PCC are governed by grid hence ILC operates in the current control mode to inject power from distributed energy sources to the grid. While ESU supports the DC bus. The objective of the HMG is that it meets both AC and DC load demand irrespective of the operating modes. The system possesses grid synchronization capability. It is noteworthy to mention that PVC AC/DC converter is used not only to transfer the active power from PV array to the grid but also supports the grid by providing reactive power. The harmonics and reactive power demand of the local loads are met by the ILC. This is accomplished by employing a total least square based adaptive filter. The hybrid microgrid is simulated on a MATLAB/Simulink platform to validate the modes of operation and a comparative analysis w.r.t to other adaptive filters is presented. Lastly, the system is tested on an OPAL-RT based real time simulator.