Grid Forming Converter Having Power Sharing and Synchronization Capability With DFIG Based WECS

In the presence of the utility grid, the inverter based resources such as wind, hydro and photovoltaic operate in the grid following mode as the voltage and frequency are maintained by the grid. However, with the growth in offshore wind technology, where the presence of grid is challenging, grid forming converters are required to maintain stiff voltage and frequency. In this work, a different configuration is presented for the wind energy conversion (WECS), small hydro-solar photovoltaic (SHPV) based microgrid where the local grid is formed by the SHPV system combined with a battery energy storage (BES). Switching logics for the converters are provided in both the modes. The synchronization of the WECS with the SHPV meets the IEEE standard. The power is extracted from the wind only if the wind speed is above threshold and the difference of power is transferred to the local grid. Uninterrupted power is maintained to the local loads. Simulated results are presented to depict various transitional modes of the microgrid.