JPH04183227A - Demand control method for electric power - 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] This invention suppresses and controls the power consumption of a group of power loads based on the highest value of the monthly maximum power values of each of the past 12 months including the current month. The present invention relates to a power demand control method.

[Conventional technology]

In recent years, a metered electricity rate system (new rate system) has been adopted. In this metered electricity rate system, the contract electricity is the highest value of the monthly maximum electricity values for each of the past 12 months including the current month, and therefore, the contract electricity will change over time. It will be updated if more values appear.

On the other hand, in recent building equipment, etc., power demand control is performed to suppress the power consumption of a power load group to within a target power level. In this power demand control, for example, 90% of the contracted power is set as the target power.

If the highest value of the monthly maximum electric power values of each month in the past 12 months including the current month is automatically updated and held as a higher value appears as time passes, the actual electricity rate will be It is possible to perform power demand control that corresponds to the system.

[Problem to be solved by the invention]

However, when performing power demand control compatible with the actual electricity rate system, if an excessive power value (abnormally high value) occurs due to some abnormality, that power value is updated and held as the highest value. Therefore, a problem arises in that power demand control is performed using, for example, 90% of the held abnormally high value as the target power.

[Means to solve the problem]

The present invention was proposed to solve such problems, and it is possible to set the monthly maximum power value of each month of the past 12 months including the current month at the time of initial startup on the screen, and to set the maximum This allows the values to be modified on the screen.

[Effect]

Therefore, according to the present invention, at the time of initial startup, the monthly maximum power value for each of the past 12 months including the current month can be set at the level of an instrumentation engineer.

When the monthly maximum power value for each month is set at the time of initial startup, the highest value of the set monthly maximum power values for each month is held. Then, power demand control is performed based on this highest value held. The highest value being held is automatically updated and held as a higher value appears over time.

Here, when an abnormally high value occurs, this abnormally high value is updated and held as the highest value. In this case, according to the claimed invention,
The maximum value being held (abnormally high value) can be corrected to a normal value at the operator level.

〔Example〕

Hereinafter, the power demand control method according to the present invention will be explained in detail.

First, the settings at initial startup, that is, the settings at startup will be explained. At initial startup, the instrumentation engineer enters a special command via the keyboard, selects variable type (actual amount system) as the target power determination method, and then displays the screen shown in Figure 2 on the display (power consumption system). Demand details setting screen) Display A. Then, touch the "highest of the month" area 1 displayed at the lower right corner of the screen. Then, the screen on the display shifts to screen B (monthly maximum demand value setting screen) shown in FIG. Here, the instrumentation man reads the actual monthly maximum power value for each of the past 12 months, including the current month, from a ledger or the like, and inputs the read value via the keyboard. The screen shown in FIG. 3 shows the situation after input. This completes the initial startup settings.

Immediately after the initial startup settings, the highest value of the set monthly maximum power values for each month, that is, regarding the monthly maximum demand value setting screen B in Fig. 3, the r498 k for August.
wJ is held as the highest value.

Then, this highest value is taken as the contract power, and 9 of this contract power is
Power demand control is performed for the power load group with 0% as the target power. In this example, the predetermined time to be predicted is set to 30 minutes, and the total power consumption of the power load group for each unit time (for example, 3 minutes) during this 30 minutes is sequentially measured, and based on this actual measurement value. A predicted value of the total power consumption for 30 minutes is obtained, and the amount by which this predicted power exceeds the target power is set as the cut-off power amount, and power demand control is performed for the power load group.

On the other hand, for the above contract power, the monthly maximum power value of the current month is, for example, r
When it becomes 500kWJ, this "r500kW" is automatically updated as the new contract power.

That is, the highest value being held is automatically updated and held as a higher value appears over time. and,
The updated and maintained maximum value is set as the new contract power, and 90% of this contract power is set as the target power, and power demand control is performed for the power load group.

During such power demand control, the operator can cause a screen (control menu screen) C as shown in FIG. 4 to appear on the display. Here, if the "power demand control" area 2 on this control menu screen C is touched, the screen on the display shifts to screen D (power demand curve screen) shown in FIG. 5. On this power demand curve screen, if you touch the "Settings" area 3, the screen on the display will change to the screen shown in Figure 6 (
Power demand setting screen).

In this situation, for example, r
When lookwJ occurs, this “1000 kwJ
is automatically updated and held as the highest value. That is, on the power demand curve screen shown in FIG. 5 and the power demand setting screen E shown in FIG. 6, the display of contract power changes from 500kw to 11000k. Also, at this time, calculated as 90% of 11000k, or 900k
W becomes the target power, but as shown in the power demand setting screen E shown in FIG. 6, the upper limit of the target power is 49.
Since it is set as 0kw, the target power actually applied is 490kw.

That is, when an abnormally high value occurs in which the calculated target power is 490 kW or more, the target power is set to 490 kW or more. However, this setting of the target power to 490 kW is only temporary and should be returned to the value immediately before the abnormal high value occurred, that is, the normal value. In this embodiment, the return of the target power to the normal value can be easily performed at the operator level.

That is, when an abnormally high value occurs, a warning is issued.

When this alarm occurs, the operator displays the power demand setting screen E' (FIG. 1). In this power demand setting screen E', for example, 11000k is displayed as an abnormally high value in the [current month's highest power demand value] area 4. When you touch this "highest power demand value of the month" area 4, a numeric keypad window 5 will appear adjacent to this area 4.
is displayed.

Therefore, for example, by looking at the remaining report, etc., the operator inputs the value immediately before the abnormal high value occurred, that is, 470 kW, using the numeric keypad window 5. Then, the value displayed in "highest power demand value of the month" area 4 is corrected to 470kW,
The power demand setting screen E shown in FIG. 6 is displayed, and the power demand control is returned to the power demand control immediately before the abnormally high value occurred.

However, if the total power consumption calculated at 24:00 on the last day of the previous month is an abnormally high value, the display in the "highest power demand value of the month" area 4 does not indicate the abnormally high value. That is, [
If the total power consumption determined at 24:00 on the last day of the previous month is an abnormally high value, it cannot be corrected only by displaying in the area 4 "Highest power demand value of the current month." Therefore, in this embodiment, the "highest power demand value of the previous month"
A region 6 is arranged in parallel, and similarly to the "current month maximum power demand value" region 4, the abnormally high value of the previous month can be corrected to a normal value in the current month.

Note that on the power demand curve screen shown in FIG. 5, touching the "daily load" area 7 will bring up the daily load curve screen F shown in FIG. 7, and touching the "monthly load" area 8 will bring up the daily load curve screen F shown in FIG. When the column load curve screen G touches the "registration table" area 9, the power demand registration surface H shown in FIG. 9 appears.

For reference, FIG. 10 shows the screen transition status at the instrumentation man level and operator level.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the highest value being held (abnormally high value) can be corrected to a normal value at the operator level, and the power demand control can be returned to the state immediately before the abnormally high value occurred. becomes possible.

[Brief explanation of drawings]

Figure 1 is a diagram explaining how to correct the current month's highest demand 1゛ value on the power demand setting screen when an abnormally high value occurs, Figure 2 is a diagram showing the west side of detailed power demand settings, and Figure 3
Figure 4 shows the monthly maximum demand value setting screen, Figure 4 shows the control menu screen, Figure 5 shows the power demand curve screen, Figure 6 shows the power demand setting screen, and Figure 7 shows the power demand setting screen. Figure 8 shows the daily load curve screen, Figure 8 shows the column load curve screen, Figure 9 shows the power demand registration surface, and Figure 10 shows the transition of screens at the instrumentation man level and operator level. It is a diagram showing the situation. B...Monthly highest demand value setting screen, E, E'...Power demand setting screen, 4..."Highest power demand value of the month" area, 5...Numeric keypad window, 6..."Previous month's highest "Power Demand Value" area. Patent applicant Yamatake Honeywell Co., Ltd.

Claims (1)

[Claims] The highest value among the monthly maximum power values of each month in the past 12 months including the current month is automatically updated and held as a higher value appears as time passes, and this stored value is automatically updated and held. A power demand control method for suppressing and controlling the power consumption of a power load group based on the maximum value, wherein the monthly maximum power value of each month in the past 12 months including the current month at the time of initial startup can be set on the screen, and the above-mentioned retention is possible. A power demand control method characterized in that the highest value among the values can be corrected on a screen.