Watching System for Aged Single Person by using Smart Meter

Part 1: Fluctuation Estimate Method and Influence Evaluation of Watt-Hour Granularity on Watching Certitude

Abstract

We are making a proposal of a watching system for aged single persons living alone by using smart meters. The 30-minute watt-hour data sent from the meters via “A” route are used for it. We are expecting that we can build the watching system inexpensively and effectively as one of the social infrastructures through cooperation between local governments and power utilities which operate the smart meters.

We hatched out “the fluctuation estimate method” as a watching algorism for the smart meters. We evaluated an influence of the watt-hour granularity of the meter on a watching certitude of the method. Then we clarified that 0.01kWh of the granularity was required for proper watching over. We also made it clear that “the fluctuation estimate method” was much better than the “average method” which we had developed before.