Question

8.Describe the hierarchical control structure of microgrid.

Answer 1

Describe the hierarchical control structure of micogrid The Microgrid control system is one of the very critical and challenging parts in the study of Microgrids. The principles of) Involved differ quite significantly from those of centrale zed or traditional power systers. For the Microgrid havever, this inertica is absent due to the fact that most sources on Microgrid are renewable which are intermittent, thus making the control system design quite challenging. A new control strategy for Controlling Microgrids known as Hierarchical control. Hierarchical control consists of three levels : D primary control, 2) Secondoay control, w 3) teritary control.

Teritary control optimal operation In both operating modes Power flow control In grid-tied mode Secondary control compensating the voltage devtaltion caused by primary control compensating the frequency deviation caused by primary control Primary control Feedback signals Voltage stability provision Frequency stability preserving plug & play capability of DERS circulating current avoidance anong DERS Microgrid Tie Main Microgrid Fig Diagrammatic representation of the basic Hierarchical Control structure