Development of Direct Load Control System for Residential Air Conditioner in Distribution Automation Communication System

Abstract

In recent years, especially electric power demand is concentrated on the daytime of summer by the spread of air-conditioners etc. And the demand gaps between daytime and nighttime and between seasons tends to spread. DSM (Demand Side Management) technology is expected as one of the methods which attains load leveling according to such a background. Especially, the concentrated load control system which controls directly the customer apparatus (air-conditioner) which is working at the summer peak hour, can reduce load electric power certainly as peak shaving technology, but the control method must be received by the customer and the degree of acceptance will influence the effect of DSM greatly. Then, authors searched for the control method which does not spoil the comfortableness of a customer by physical feeling experiment, and have grasped the fundamental electric power control effect when controlling an air-conditioner by this method. Furthermore, in order to evaluate the electric power control effect in a power distribution line unit, the average electric power control effect was searched for from operation of the air-conditioner at the time of carrying out DSM control of two or more air-conditioners. Moreover, as the means, it considered as the method of carrying out communication transmission of the control signal to the air-conditioner in customer's houses from our sales office, and the concentrated air-conditioner control system using the distribution automation communication system was developed.