Intelligent local controllers

This chapter describes intelligent control concepts for power electronics interfaced microsources. These controllers are responsible for voltage and frequency control in microgrids and are essential for stable microgrid operation. The chapter discusses control concepts based on frequency/active power and voltage/reactive power droops as applied on microgrids. The feasibility of these concepts is shown by simulations and laboratory investigations. A subsection discusses droop control implementation in a voltage source inverter (VSI). Power sharing in distributed island systems is demonstrated. The implications of the line parameters on the choice of the droop parameters are explained. Finally, inverter control using fictitious impedance is analyzed. The chapter illustrates plug‐and‐play attributes of the control method for different sources.