This letter proposes a simple and inexpensive technique to improve the
frequency control of distributed energy resources. The proposed control
consists in modifying the conventional estimated bus frequency signal with an
additional feedback signal that utilizes the rate of change of the voltage
magnitude measured at the same bus. The case study showcases the benefits of
the proposed control and compares its performance with standard frequency
control schemes through time-domain simulations

Alhanjari, Bibi