Droop controller comparison for AC microgrids

The aim of this study is to analyze and compare three droop controller schemes to regulate the operation of a microgrid. Three droop control schemes are selected because of their capability to regulate voltage, frequency and power sharing without using communication links and complex measurement systems. Specifically, the conventional droop controller and two of its variants are compared, the angular and robust controllers. An analysis regarding their differences is given in terms of voltage, frequency, and power sharing performance.