An Optimal Device Control with Contract Demand  
Author Junji Koyanagi


Co-Author(s) Yuuki Furubayashi


Abstract Many electric devices are used to keep our life comfortable such as air-conditioner. Usually, we use such devices separately without considering the total electric power. However, in big facilities, such as university and factory, contract demand between user and electric company exists for the usage of electric power in Japan. If the electric power is used over the contract demand, the basic rate increases because contract demand for the next year must be increased. To keep the basic rate cheap, the contract demand should be low level. This paper considers the devices which are used to control the state of the separate areas in a facility. The state of area changes stochastically according to the on/off of the device. Each device must be turned on if the state of area becomes the specified state. The problem is that if specified number of devices are used simultaneously, the total electric power exceeds the contract demand. To avoid such situation, this paper proposes the control policy of devices by Markov decision process. The policy watches the states in the areas, and controls on/off of the devices to minimize the cost considering the penalty that the power usage exceeds the contract demand.


Keywords contract demand, excess probability, Markov decision process
    Article #:  24156
Proceedings ISSAT International Conference on Reliability and Quality in Design 2018
August 2-4, 2018 - Toronto, Ontario, Canada