Abstract: | Feedback control of fast automated demand response (FastADR) is gaining much attention for load frequency control (LFC) of the future smart grids. We propose a single aggregated transfer function for feedback control of power consumption of a cluster of wide‐area‐distributed building air‐conditioner facilities. An example of aggregated transfer function is derived from the measured step responses of the loads, and the effectiveness of the approximation for control properties is confirmed by simulations. © 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. |