JPS6380717A - Peak-cut control system of receiving power - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for controlling the peak amount of power received by a building, particularly when the load system is divided into multiple parts under specific conditions. This invention relates to implementing a load control method suitable for certain conditions.

[Conventional technology]

In conventional building equipment peak cut control methods, the names and priorities of the loads to be controlled are fixed in advance, and when the overall peak cut conditions are met, each load is controlled according to the fixed priority order. . However, no particular consideration was given to how to prioritize loads when the load system is divided into multiple parts, or how to prioritize when the load to be controlled varies depending on the time period or calendar.

In addition, as related to this type of device, Japanese Patent Application Laid-Open No. 1986-
No. 2331 etc. are mentioned.

[Problem that the invention seeks to solve]

The above conventional technology does not consider the load control method when multiple load systems are divided within the same building, etc.
When the peak cut condition is satisfied as a whole, the controlled loads connected to each load system are uniformly controlled according to a fixed priority order, regardless of the load usage status of each load system. If one tenant uses too much load and the total amount of electricity used exceeds the amount,
Since the peak cut control at the power receiving point is activated and the load is cut off according to a predetermined priority order, there is a problem in that other tenants are cut off before the tenant using too much load.

Furthermore, in the conventional technology, when the load to be controlled changes depending on the time of day or calendar (for example, lighting equipment during the day and empty equipment at night), there is no consideration given to the control method for equipment, etc. There was a problem that the operator had to change the load priority registration every time, which was cumbersome.

In view of the above-mentioned problems, an object of the present invention is to set the amount of electricity consumption for each load system even when there are multiple load systems in the same building, and to control the load for each load system accordingly. The objective is to perform control appropriate to the load usage status of the load system.

In addition, even when the load to be controlled changes depending on the time of day or calendar, the present invention provides a control method that automatically determines the load priority by dividing the load into predetermined load systems and scheduling priorities for the load systems. .

[Means for solving problems]

The above purpose is to
Alternatively, install a power meter for each of multiple load systems whose usage changes depending on the time of day or calendar, set the maximum demand power to be distributed to each system of this power meter, perform peak cut control, and When the peak cut control conditions are met,
This is achieved by determining the peak cut conditions for each load system arrangement at the time of controlling the load, and controlling the load from among the load systems for which the conditions are met.

Furthermore, we have multiple patterns in which the maximum power demand set for each load system is changed according to the usage status of each load system that changes depending on the time of day and calendar, and this is automatically selected according to the schedule, When the peak cut condition is met, the peak cut condition is determined based on the maximum power demand for each load selected in the schedule in the calendar at that time, and the load is controlled from among the load systems for which the condition is met. It's something that will happen.

[Effect]

Since the peak cut conditions for each load system are determined after the peak cut conditions are satisfied at the power receiving point, if the power usage amount is exceeded in one load system, the peak cut control at the power receiving point is activated, and the peak cut conditions for other load systems are activated. This solves the problem of controlling even the load.

In addition, multiple patterns are prepared in which the maximum power demand is changed for each load system, and this is automatically selected by the schedule, so the amount of power used is distributed between the load systems according to the time period and calendar. Even if conditions for peak cut control are met at the power receiving point, priority can be automatically assigned for each load system based on the magnitude of the maximum power demand setting, eliminating the hassle of operators having to change priorities each time. be done.

〔Example〕

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

FIG. 1 is a configuration diagram for implementing the present invention, and the watthour meters installed for each load system of the present invention are WHI, WH2,
It is WH3. In the present invention, there are three types of load systems and three types of power meters, but there may be any number of them depending on the equipment.

Furthermore, the processing device 6 implements the control of the present invention,
The flowchart shown in FIG. 2 is executed, the pattern shown in FIG. 3 is stored, and the schedule shown in FIG. 4 is executed.

In FIG. 1, LD11 to LD34 are loads connected to the power system, and in the present invention, LDII to LD14 are connected to load system 1, LD21 to LD24 are connected to load system 2, and LD21 to LD24 are connected to load system 2. LD is connected to 3.
31 to LD34, and four loads are connected to each load system, but it does not matter how many there are.

In addition, LDII to LD34 are power receiving power meters W.

If it is determined that the predicted measured value requires control for the maximum power demand, the load is controlled via the output device 5 according to a predetermined priority order.

Load systems 1, 2.3 can be considered as load systems M1, 2, and 3 each having a different purpose in building equipment.
It can also be considered as load systems 1 and 2.3 where the load usage status changes depending on the time of day and calendar.

In the present invention, the above-mentioned systems are simply treated as load systems 1, 2, and 3 without distinction, and it goes without saying that either can be considered depending on the situation.

Now, there are three load systems in the building.

Control operations for load systems 1, 2, and 3 will be explained with reference to the configuration diagram in FIG. 1 and the professional chart in FIG. 2.

It is assumed that the received maximum power demand amount and the maximum power demand amount for each load system are distributed and set in advance according to each load and stored in the processing device 6.

First, the received power amount and the received power amount for each load system are measured from the received power meter WHo, and the power meter WHs, WHz, and WHδ for each load system, and then sent to the processing device 3 via the input device 4. (Stop 11).

Next, the processing device 6 predicts the increasing trend of the amount of electricity from the measured value of the amount of received electricity, compares the prediction result with the maximum demand for electricity, and determines whether it is necessary to control the load (Stop 2) Here, various methods for predicting the amount of electric power have been devised at present, and the present invention does not specify any particular method.

If the result determines that no control is required, the pH is returned to 5tapH and the power amount is measured again.

If the result is that control is not necessary, the process moves to 5steps 13 to 19. 5 step 13, 14 and 5 step 15.
16 and 5topl 7 and 18 are processes for each load system 1 and 2°3, but since the processing contents are the same except for the load system, only 5topl 3 and 14 will be explained as representatives.

The processing device 6 predicts the increasing trend of the power amount from the measured value of the power amount of the load system 1 taken in at 5tapH in the same way as in the case of power reception, and compares the prediction result with the maximum demand power amount of the load system 1. Loads LDII, LD12 . LD1
3. It is determined whether it is necessary to control the LD 14 (Stopl 3).

If it is determined that control is not necessary, the process is performed to 5top15, but if it is determined that control is required, the load LDI in load system 1 is
I, LD12. LI)13. The LD 14 is controlled via the output device 5 in a predetermined priority order (Sto
p 14).

In other words, steps 5top13 to 1''8 are processes for determining whether control of the load of the own load system is unnecessary or necessary based on the predicted power amount for each load system.

Therefore, even if it is determined that the load needs to be controlled based on the prediction result of the received power amount at the power receiving point, the same determination is made for each load system, resulting in a low load due to excessive power usage in one load system. This eliminates the need to control the load on the grid. By replacing the load system with each tenant, it becomes possible to perform fair control commensurate with the amount of power used by each tenant.

Next, another embodiment of the present invention will be described.

In the previous embodiment, the maximum power demand of load systems 1, 2, and 3 was distributed in advance, but several patterns were prepared in which the maximum power demand was varied for each load system, and this was distributed according to the time period or The pattern is selected based on the schedule on the calendar. This control will be explained using FIGS. 3 and 4.

Figure 3 shows the maximum power demand settings for each load system, A and B.
This is an example of a pattern table when four patterns of , C, and D are prepared, and appropriate numerical values are also shown as examples.

The number of patterns and numerical values can be arbitrary.

The processing device 6 shown in FIG. 1 stores the pattern table shown in FIG.

FIG. 4 is an example of a schedule table showing which of the four patterns A, B, C, and D prepared in FIG. 3 is to be used for each time period.

In this example, we created a schedule table based on time zone, but the day of the week is February 2nd.
Even if you use a daily calendar, the same idea can be used as in this example.

Furthermore, the time zone can also be set arbitrarily.

The processing device rI16 of FIG. 1 stores the schedule table of FIG.

A process is performed in which one of patterns B, C, and D is selected, and the maximum power demand of the selected pattern is allocated and set to each load system using the pattern table shown in FIG.

After setting the maximum demand power amount for each load system, the control process explained in FIG. 1 and FIG. 2 is performed.

As explained above, FIGS. 1, 2, and 3.

By executing the process shown in Figure 4, it is possible to control the maximum power demand for each load system by automatically changing it according to the time of day or calendar schedule. Even if there is, it is possible to automatically perform control according to the load usage status using a preset pattern table.

In addition, in step 19 of Figure 2, if it is determined that load control is required at the power receiving point, but it is determined that load control is not necessary for each load system, the maximum power demand for each load system is set appropriately. In this process, the load of each load system is controlled in a predetermined priority order so that the received maximum demand power amount is not exceeded at the power receiving point.

According to this embodiment, in peak cut control when there are multiple load systems in which building equipment has different load usage conditions depending on the time of day or calendar, multiple patterns of maximum power demand that are varied for each load system are prepared. The maximum demand power amount is automatically assigned to each load system according to the time period and calendar schedule, so even if the peak cut control judgment result at the power receiving point indicates that load control is required, the load control is automatically set. This has the effect of being able to control the load on each load system according to the priority order that matches the usage status.

〔Effect of the invention〕

According to the present invention, in peak cut control when there are multiple load systems for different usage purposes (for example, tenants) in building equipment, even if the judgment result of peak cut control at the power receiving point indicates that load control is required, It is possible to distribute and set the maximum amount of power demand for each load system and determine whether to perform peak cut control on the own load system, so it is possible to control the load of each load system in a priority order commensurate with the amount of power used by each load system. effective.

[Brief explanation of the drawing]

- Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a flowchart of an embodiment of the present invention, and Fig. 3 is a pattern of maximum power demand for each load system in an embodiment of the present invention. FIG. 4 is a diagram showing an example of a schedule table for pattern selection according to another embodiment of the present invention. W Ho, W Ht, W Hx, W Ha
- Electric energy meter, LDII to LD34...Equipment load, 1,
2.3... Load system, 4... Input device, 5... Output device, 6... Processing device.

Claims (1)

[Scope of Claims] 1. Means for monitoring the amount of power used by a plurality of loads at a power receiving point, and means for predicting an excess of the amount of power used with respect to the maximum amount of power received by the loads as a whole, In addition to the above-mentioned monitoring means, means for individually monitoring the amount of power used for each of the plurality of load systems, and means for individually monitoring the amount of power used for each of the plurality of load systems, and controlling the load of the plurality of loads according to a predetermined priority order according to the results. A means for distributing and setting the electric energy and a means for predicting an excess of the individually monitored electric energy consumption with respect to the maximum electric energy demand for each of the plurality of load systems are provided, and the prediction result for the entire load is calculated as the load. When it is determined that control is required, the prediction result of the amount of power used for each of multiple load systems is such that load control is performed preferentially from the load system that is determined to require load control within the load system. Cut control method. 2. In claim 1, the means for setting the maximum demand power amount for each of the plurality of load systems is a peak cut of received power amount, characterized in that a plurality of values can be set according to a schedule based on a time zone and a calendar. control method.