Fast Decoupled Power Flow for Stand-Alone AC Microgrids with Droop Control

This article presents an extension of the classic fast decoupled algorithm oriented to the solution of the load flow of isolated microgrids with droop control. Microgrids in isolated operation have a series of characteristics that limit the application of conventional methods for calculating the load flow, such as the absence of a reference bus, floating frequency, and the presence of droop generation control. In this article, the classic fast decoupled load flow algorithm is modified and extended to weak, isolated microgrid applications with droop control. The performance of the algorithm is investigated using a 38-bus test system.