When grid-connected, microgrids are able to procure a wide range of ancillary services, like frequency and voltage control. Though the impact of a limited number of microgrids on the large-scale grid is negligible, the large number of microgrids available in the future will be able to support the power systems in many different ways. In this video, you will learn about the ancillary services provided not only by microgrids to the external grid, but also from the external grid to microgrids.