Power system studies considerations for Microgrid design

Abstract

The value-proposition for Microgrids depends largely on the need and application. A Microgrid can be described as a group of interconnected loads and distributed energy resources (DER) inside some distinct electrical boundaries that act as a single controllable unit relating to the grid. It should be capable of safe transitioning from the grid and reconnection back to the grid; with the voltages, frequency, etc. of all devices still operating within their allowed limits. Although system resilience and continuous supply is one of the main proponents for the establishment of microgrids, it could also be used to electrify an off grid or remote area, far from the grid. The mode of operation as well as generation types and sources, together with the current protection devices and schemes, will determine the extent of power system studies that will be conducted when planning and designing a Microgrid. This paper highlights the typical power system studies that needs to be considered, when designing aa Microgrid.