JPS63140625A - Power demand controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to power demand control, and particularly to a power demand control device suitable for use when the operational importance of equipment changes depending on environmental conditions.

[Conventional technology]

Conventional power demand control was developed by Yamatake Honeywell Co., Ltd. in 1981.
, January publication “Energy saving management system 5AvIC50
As disclosed in the 00 System Manual, a method is used to set the equipment to be controlled and their priorities, but unless the operator performs a setting change operation, the same setting priority will always be used. Control was based on ranking.

[Problem that the invention seeks to solve]

The above conventional technology does not take into account the fact that the operational importance of equipment changes depending on environmental conditions such as seasonal and time zones, so the priority does not change even if the equipment becomes more important due to changes in environmental conditions. Therefore, there was a problem in that the stop control was performed before the others. Furthermore, in order to prevent this, the operator must change the settings every time the environmental conditions change, which is cumbersome.

An object of the present invention is to provide a power demand control method that can automatically switch control priorities and equipment according to the operational importance of equipment that changes depending on environmental conditions, and can always perform optimal control. be.

[Means for solving problems]

The above object is achieved by providing a plurality of types of control patterns in which demand control equipment and their priorities are set, and selecting and using them according to environmental conditions.

[Effect]

In each control pattern information, equipment is registered with priority according to environmental conditions such as 2 hours of the season.
When executing demand control, control pattern information suitable for the environment at that time is selected from among a plurality of pieces of control pattern information, and is used as a control execution pattern.

Environmental conditions such as 9-hour season are automatically determined by scheduling based on date and time.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a block diagram for implementing the present invention. The demand control equipment and priority according to the present invention are stored in control pattern information 5, and the information for selecting this control pattern information is centrally stored as selection condition information 6. It is stored in the processing bag fill. In the demand control program 2, an excess of the maximum demand power amount is predicted based on the received power amount WH input from the power receiving point, and power demand control is executed. When executing the control, a control pattern h suitable for the environment at the time of execution is extracted based on the selection condition information 6, and that control pattern is extracted from the control pattern group and used as a demand control execution pattern. The console 4 and the man-machine program 3 are used by the operator to change these setting information.

FIG. 2 shows a detailed example of the selection condition information 6.1 In this embodiment, the date and time are used as the environmental conditions. I can do it. Furthermore, the control pattern island to be used can be taken out from the 0 time pattern using 1 time.

FIG. 3 shows a detailed example of the control pattern information 5.

Equipment that is subject to demand control for each control pattern is registered according to priority. This control pattern information is set as many times as desired to be switched in accordance with changes in environmental conditions.

FIG. 4 is a flowchart of the demand control program 2 for implementing the present invention. This program consists of 6 steps (1) that are periodically activated by a timer.
At 0, the amount of received power is measured and the amount of power used by the equipment is calculated.

In step 2o, the total amount of power used within the demand monitoring period is predicted and calculated based on the amount of power used measured in step 10.

Here, various methods of prediction calculation are currently being implemented, and the present invention does not particularly specify the method. In step 30, it is determined whether the predicted total power consumption exceeds a preset maximum power demand, and if it exceeds, steps 40 and 50 are performed to reduce the power load.
If it does not exceed the limit, it ends without doing anything.

Steps 40 and 50 are functional parts added according to the present invention to select a control pattern schedule based on date and time. First, in step 40, a time pattern h corresponding to the current date is extracted from the seasonal pattern information.
In step 50, a control pattern Nα corresponding to the current time is extracted from the time pattern information. In step 60,
The control pattern information corresponding to the control pattern Nα extracted in step 50 is extracted, and the equipment set therein is stopped in descending priority order.

Note that in this embodiment, three types of time patterns are made by correlating dates with seasons, and two types of control patterns are used for negative days, but the number of patterns can be increased by correlating days of the week, holidays, and specifics with dates, etc. can be easily implemented as a modification of this example.

〔Example〕

According to the present invention, even if the operational importance of equipment changes depending on the environmental conditions, it is possible to automatically select a priority order commensurate with the operational importance of the equipment, so fine-grained power demand control can be carried out in accordance with changes in the R environment. By performing automatic selection, it is possible to eliminate the troublesomeness of the operator's setting change operation when the environment changes.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 is a detailed diagram of the selection condition information shown in FIG. 1, FIG. 3 is a detailed diagram of the control pattern information shown in FIG. The figure is a flowchart of one embodiment of the present invention. 1...Central processing unit, 2...Demand control program. 5... Control pattern information, 6... Selection condition information.

Claims (1)

[Claims] 1. Means for measuring the amount of power used by all of the plurality of equipment;
A means is provided for predicting an excess of the power usage over the maximum demand power based on the measured power usage, and according to the prediction result, load control is performed according to control pattern information in which control devices and priorities are registered. A power demand control device that performs power demand control, characterized in that a plurality of the control pattern information is provided and a means for selecting according to environmental conditions is added. 2. The demand control device according to claim 1, wherein schedule selection based on date and time is performed in selecting the plurality of pieces of control pattern information.