Patent ID: 8311680
Filing Date: 2012-11-13
Classification: G06Q

Abstract:
1. A method of determining a demand threshold, the method comprising: a control unit arranging a plurality of demand datum in a descending or an ascending order represented by a vertical axis at equal intervals along a horizontal axis to form a curve, the demand datum related to a power consumption of an electric apparatus; the control unit connecting a maximum demand datum and a minimum demand datum of the curve with a straight line, wherein the curve only intersects the straight line at the maximum demand datum and the minimum demand datum; the control unit constructing and moving a perpendicular line along an entire distance of the straight line, wherein a perpendicular distance between each point on the straight line and curve is calculated to determine the perpendicular line of a longest perpendicular distance between the straight line and the curve, the control unit setting the demand threshold as the perpendicular line of the longest perpendicular distance between the straight line and the curve; a measuring unit measuring the demand datum related to the power consumption of the electric apparatus at an end of a time unit of a time segment, and calculating a demand of the time segment according to the measured power consumption; and shutting down the electric apparatus when the calculated demand is greater than the demand threshold.