Computation method of limited value of demand and control method and system of demand

Abstract

The invention relates to a computation method of limited value of demand and a control method and system of demand. The computation method comprises the following steps: (a) a control unit ranks a plurality of demand values into a curve from big value to small value; (b) the control unit connects the maximum demand value and the minimum demand value into a straight line; and (c) the control unit finds the maximum demand value of the distance from the curve to the straight line and sets the maximum demand value as the limited value of demand. The system comprises a measuring unit and the control unit, wherein the measuring unit is used for measuring the power consumption when unit time ends and estimating the demand in a time interval which comprises a plurality of unit time; and the control unit computes the limited value of the demand according to a plurality of demand values, and an electric device is uninstalled if the estimated demand is more than the limited value of the demand.

Description

technical field [0001] The present invention relates to a control method and system thereof, and in particular to a calculation method of demand limit value, demand control method and system thereof. Background technique [0002] Although the store floor area of ​​convenience stores is small, its energy consumption index is higher than that of department stores and supermarkets. With the rise of energy-saving awareness, how to design an effective and appropriate energy-saving system according to the electricity consumption of convenience stores will be an important research topic. [0003] Convenience stores are business places that serve customers. When implementing energy-saving strategies, it is necessary to consider whether it will affect the operation of the store. In the application "Store Management System" of Japanese Patent Publication No. JP2006178886, a set of integrated POS and store management platform architecture is disclosed, which provides the function of r...

AI Technical Summary

Problems solved by technology

[0007] However, the traditional demand control method is to artificially define a fixed value as the limit value, which is not only difficult to control, but also cannot be applied to various situations according to local conditions

If the setting is too high, it will lead to excess charges for electricity consumption exceeding the contracted capacity; if the setting is too low, the system will continue to be uninstalled and cannot operate normally.

In addition, even for the same type of business premises, each store has different parameters such as region, season, number of customers, and size of square meters, and the power consumption will also vary accordingly. Setting a fixed value limit value cannot be used universally for every store.

If the limit value cannot really reflect when electricity consumption must be reduced, subsequent control procedures will also be meaningless

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