Over the years, the deployment of distributed energy resources (DER) has risen rapidly with the explosive growth in renewable energy sources (RES), especially using the solar photovoltaic (PV) systems and the wind power, as well as the battery storage. While the early deployments of DER were enabled by synchronous generators (SGs), typically driven by diesel or natural gas engines, the recent growth in DER and RES is made possible by advances in grid connecting inverters. Primarily, there are two types of grid connecting inverters, namely grid-following (GFL) inverters, and grid-forming (GFM) inverters. Although inverters provide the interface between the grid and energy sources like solar panels, wind turbines, and energy storage, there is some difference between GFL and GFM inverters.
From the Editor– Enhancing the Reliability of Electric Grid
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