METHOD OF DETERMINING DEMAND THRESHOLD, AND METHOD AND SYSTEM OF DEMAND CONTROL

• US 20100168929A1
• Filed: 08/12/2009
• Published: 07/01/2010
• Est. Priority Date: 12/26/2008
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Lin, Cheng-Ting, Tseng, Wen-Hsiang
• Granted Patent: US 8,311,680 B2
• Time in Patent Office: Days
• US Class Current: 700/291
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: G06Q 50/06 Energy or water supply

Abstract

A method of setting a demand threshold is provided. The method comprises: (a) a control unit arranging a plurality of demand data in a descending or an ascending order as a curve; (b) the control unit connecting a maximum demand datum and a minimum demand datum with a line; and (c) the control unit setting a demand datum with a longest perpendicular distance to the line as a demand threshold.

Claims

1. A method of determining a demand threshold, the method comprising:

an control unit arranging a plurality of demand data in a descending or an ascending order at equal interval as a curve;

the control unit connecting a maximum demand datum and a minimum demand datum with a line; and

the control unit setting a demand datum with a longest vertical distance to the line as the demand threshold.

2. The method according to claim 1 further comprising:

the control unit checking if there is updated demand datum; and

if yes, updating the demand threshold accordingly.

3. A method of demand control, comprising:

a control unit setting a demand threshold, comprising;

arranging a plurality of demand data in a descending or a ascending order at equal interval as a curve;

connecting a maximum demand datum and a minimum demand datum with a line; and

setting a demand datum with a longest perpendicular distance to the line as the demand threshold;

a measure unit measuring the power consumption at the 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 an electric apparatus when the calculated demand is greater than the demand threshold.

4. The method according to claim 3 further comprising:

the control unit checking if there is updated demand datum; and

if yes, the control unit updating the demand threshold accordingly.

5. The method according to claim 3 further comprising:

the measure unit measuring the power consumption at the end of another time unit in the time segment, and calculating another demand of the time segment according to the measured power consumption;

shutting down another electric apparatus when the calculated demand exceeds the demand threshold.

6. The method according to claim 3 further comprising;

turning on the electric apparatus at the beginning of a time segment.

7. The method according to claim 3, wherein the time segment comprises N time units, a neglecting time comprises n time units, n≦

N, and the method further comprises;

the measure unit determining if it is the neglecting time; and

if yes, the measure unit defining a demand according to the power consumption of the neglecting time.

8. A demand control system, comprising:

a measure unit, measuring the power consumption at the end of a time unit and calculating a demand of a time segment accordingly, wherein the time segment comprises a plurality of time units; and

a control unit, calculating a demand threshold according to a plurality of demand data, and shutting down an electric apparatus when the demand is greater than the demand threshold.