Demand Side Frequency Control in Low Inertia Power System

Transitioning towards carbon-free energy has necessitated the provision of fast frequency response due to reduced system inertia. Controllable thermal loads can respond instantaneously to control signals, suggesting that there exist a large fast frequency response capability from the demand side. A mathematical representation of the power system behavior considering the demand side fast frequency response in low inertia power systems is proposed. The proposed method considered frequency control constraints. The applicability of the presented method is demonstrated on an islanded microgrid. The results show that the proposed method models the power system frequency dynamics following contingency events according to the demand side fast frequency response availability.