Currently, power savings are strongly requested. We propose a method for power savings that considers the characteristics of appliances by using appliance classes and power margin of individual appliance by using bidirectional communications. In this paper, we show the mechanism, implementation and the results of verification experiments.
Power savings are strongly requested to suppress the total usage under the supply capacity after the atomic power disaster in Japan. There have been many efforts to control power usage such as Demand Response and Demand Side Management. However, they have intrinsic difficulty as a cross-layer control, which crosses technical layers from the electric infrastructure layer to the appliance layer, and also management layers from the supplier layer to the customers usage layer. The objective of the supplier in the control would be to maximize its revenue within its supply capacity, and the objective of the customers would be to use electricity freely within the contracted power limit. As they do not coincide, then they may conflict each other. The cross-layer control would be only valid for agreeable objectives such as to avoid black outs from over usage. Furthermore, such control would not be accepted by the customers if the system do not care about customers situation.