Virtual Inertia Response Research Articles

96/1649 Optimal dynamic load shedding using a Newton based dynamic algorithm

Compared with frequency regulation by wind generation system, a battery energy storage system (BESS) is a better alternative for providing frequency regulation and inertial response in a faster, more accurate and flexible manner. So, participation of BESS in an islanded microgrid frequency regulation can assist renewable distributed generators (DGs) in operating at their maximum efficiency without excessive power curtailment. Furthermore, a BESS can mitigate the frequency variation with a faster response when the frequency disturbance occurs in an islanded microgrid. If the energy capacity of the BESS is limited, a wind turbine generator can gradually take over the mid-to-long term frequency regulation tasks through emulated droop response and Automatic Generation Control (AGC) control.In this chapter, we will focus on the coordinated frequency regulation and control of BESSs and wind power in the islanded mode of microgrid or microgrid cluster. The objective of microgrid frequency regulation is to regulate the frequency of an islanded microgrid to the specified nominal value in the event of frequency disturbance, and at the same time to maintain the tie-line power interchange among different microgrids within a microgrid cluster, or between two virtual areas within a single islanded microgrid at the scheduled value by coordinating the outputs of wind power generation and BESS through virtual inertial response, frequency droop control and load frequency control.