JP2000184590A - Monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the frequency for a monitoring person to monitor a device to be controlled by taking seasonal factors in the selection condition for the device to be controlled, in controlling service power to be controlled actually for restriction of the service power. SOLUTION: A control-variable computing part 17 selects a device to be controlled and computes a control variable if predicted service power exceeds a demand contract alarm value. If outside air temperature is summer-seasonal preset temperature or higher, the control-variable computing part determines it is a summer season at present, and selects the device to be controlled from a controlled device list. If the outside air temperature is below summer-seasonal preset temperature, the control-variable computing part 17 selects the controlled device from a general controlled device list. General controlled devices are controlled so as to stopped sequentially. In the case of selection from a summer-seasonal operating device list, the room temperature meeting an air conditioner for the device to be controlled is loaded to decide whether it is such a temperature that the air conditioner can be stopped. If it is such a temperature that the air conditioner can be stopped, the air conditioner is stopped. If it is such a temperature that the air conditioner cannot be stopped, a preset temperature is raised so as to become a control-variable. It is thus possible to keep an air- conditioning environment at a fixed level of higher for controlling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for monitoring the power usage of a building or a factory, and more particularly to a power usage on a customer side exceeding a power demand contract between a power company and a power customer. The present invention relates to a monitoring device that performs monitoring so as not to be performed.

[0002]

2. Description of the Related Art In conventional power demand monitoring, a predicted power consumption at the end of demand monitoring is always calculated from a current power at a constant period regardless of a fluctuation tendency of the current power, and this value exceeds a demand contract power. Was determined whether or not. When the predicted power consumption exceeds the demand contract alarm value, the devices operating in accordance with the priority order of the control target devices determined in advance are stopped to limit the power consumption. At this time, warning guidance was provided to the observer, but the user using the stopped device was not notified.

[0003]

However, the following problems have been pointed out in the conventional monitoring apparatus as described above. That is, in the conventional monitoring device, the monitoring itself is always performed at a constant cycle regardless of the fluctuation of the power usage state, so that the monitoring itself is delayed with respect to a sudden increase in the power usage, and the power limit control is not executed. In such a situation, the actual power use may exceed the demand contract alarm value.

[0004] In addition, in the power limiting control when the estimated power consumption exceeds the demand contract alarm value, the control target devices are stopped in accordance with a predetermined priority order. The situation, room temperature, and the like were not taken into consideration, and the air-conditioned environment was unpleasant for room residents and equipment users. In addition, since the room resident and the device user have not been notified of the driving restriction, the room resident and the device user are in a state where they do not know the degree of the driving restriction.

[0005] In addition, since the devices to be controlled and their control priorities are always unchanged throughout the year, the devices to be controlled and the control priorities are reviewed each time the air conditioner power consumption increases in summer.

The present invention (corresponding to claims 1 and 2) provides
In view of the above circumstances, the purpose was to perform accurate monitoring even in a suddenly increased power usage situation, and when executing power limit control, automatically select equipment with a high power load ratio in that season. Another object of the present invention is to provide a monitoring device that controls an air conditioner at a certain level or more even when an air conditioner is selected as a control target.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention is a monitoring apparatus for monitoring power consumption within a power demand contract, comprising: Input means for inputting an operation state, etc .; prediction calculating means for calculating predicted power consumption at the end of power demand monitoring from the input power usage status; and whether the predicted power consumption does not exceed a demand contract alarm value Power consumption excess determining means for judging power consumption, control amount calculating means for calculating a control amount for restricting power consumption when the predicted power consumption exceeds the demand contract alarm value, and a notice to the observer that the power consumption is exceeded. Alarm guidance means for notifying the control amount, and when actually controlling the control amount to limit the power consumption,
A control output unit that incorporates a seasonal element into the selection condition of the control target device. According to the first aspect, the air conditioner is automatically selected in the summer season when the control target device is selected, so that the work of reviewing the control target device by the supervisor can be reduced.

According to a second aspect of the present invention, in the monitoring apparatus according to the first aspect, in response to a rapid increase in power usage, a period for automatically judging an excess of the estimated power usage is automatically set to a short cycle to perform fine monitoring. Means for temporarily reducing the demand contract alarm value for judging the excess of the predicted power consumption and temporarily lowering the demand contract alarm value for responding with a margin when the predicted power consumption is exceeded. It is characterized by having.

According to the second aspect, when the load suddenly increases, the monitoring cycle is shortened, so that detailed monitoring can be realized, and since the tendency of the sudden increase in the load, the prospect of exceeding the forecast can be found earlier,
It is possible to quickly respond according to the monitoring situation.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention.
And FIG. 2 is a functional block diagram of a monitoring device according to the present invention.

As shown in FIG. 1, the CPU 1 of this embodiment
Is a main component of a monitoring device that monitors power consumption within a power demand contract.
1 includes a site status input processing unit 11 to a notification processing unit 20 for notifying a load function manager.

Hereinafter, each processing unit will be described. The on-site situation input processing unit 11 inputs an integrated power amount pulse of a power receiving facility in a building or a factory, and an operation state of facility equipment such as an air conditioner. The current power calculation processing unit 12 calculates the current power from the previously input integrated pulse and the currently input integrated pulse.

When the present power is increased sharply compared with the previous power, the monitoring cycle determination processing unit 13 determines that the load is sharply increased and changes the monitoring cycle from the normal cycle (1 minute) to the short cycle (1 minute). Automatically switches to about 20 seconds). If it is determined that the load is not suddenly increased, the monitoring cycle is set to the normal cycle. For example, FIG. 3 is an example of switching of the control cycle. When the current power is rapidly increased from the time point a to the time point b, the monitoring cycle from the time point b is automatically changed from the normal cycle t1 to the short cycle t2. Perform a switch. Also, if the current power suddenly stops, such as from point c to point d,
The monitoring cycle is automatically switched from the short cycle t2 to the normal cycle t1.

The predicted power consumption calculator 14 calculates the predicted power consumption at the end of monitoring based on the current power. The calculation of the current power and the predicted power consumption may be performed by any known method.

In the alarm set value calculation processing section 15, if the monitoring cycle determination processing section 13 determines that the load suddenly increases,
The demand contract alarm value is automatically reduced according to the rapid change rate in order to perform an early monitoring alarm. If there is no sudden increase in load, the demand contract alarm value is not changed. For example, the demand contract alarm value 41 in FIG. 3 is reduced from e to f in accordance with the rapid change rate.

The predicted used power excess determination processing unit 16 compares the predicted used power calculated by the predicted used power calculation unit 14 at the end of the power demand monitoring with the demand contract alarm value calculated by the alarm set value calculation processing unit 15. I do.

When the predicted power consumption exceeds the demand contract alarm value, the control amount calculation processing section 17 selects a device to be controlled and calculates the control amount. Selection of target equipment
If the outside air temperature is equal to or higher than the summer setting temperature, it is determined that the current season is the summer season, and the summer operation devices in FIG. When the outside air temperature is equal to or lower than the summer set temperature, the control target device is selected from the general control target device list 31. The general control target device performs stop control sequentially according to the control priority. Summer operation equipment list 3
For selection from 0, the room temperature is read by the room temperature sensor number corresponding to the air conditioner an to be controlled, and it is determined whether the room temperature is a temperature at which the air conditioner can be stopped. If the air conditioner can be stopped, the air conditioner is stopped. If the air conditioner cannot be stopped, the set temperature is raised from the current setting to be the control amount.

The control output processing section 18 outputs the result obtained by the control amount calculation processing section 17. The warning guidance output processing unit 19 provides guidance to the supervisor about the result of the control amount calculation processing unit 17.

In the notification processing unit 20 for the air conditioner user, the control amount calculation processing unit 17 uses the user notification destination information corresponding to the air conditioner an to be controlled from the control target device list 30 in FIG. A time limit (between the present and the next demand monitoring start time) is added to the obtained result and notified. This notification method is performed according to the notification medium between the present apparatus and the notification destination.

As described above, according to the present embodiment, the use of an air conditioner or the like is restricted when the forecast is exceeded. However, since the temperature condition of the room is taken into consideration, the use of the air conditioner is restricted while ensuring the air conditioning environment of the room. It is possible to do. In addition, by notifying the user of the air conditioner etc. of the usage restriction status,
Contact work from the observer to the user is omitted.

[0021]

As described above, the present invention (Claim 1)
According to claim 2), accurate monitoring is performed even in a suddenly increased power usage state, and when executing power limit control, a device having a high power load ratio in the season is automatically selected.
Further, it is possible to provide a monitoring device capable of controlling while maintaining an air conditioning environment of a certain level or more even when an air conditioner is selected as a control target.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is a view showing a control target device list of FIG. 1;

FIG. 3 is a diagram showing switching of a control cycle / demand contract alarm value in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU, 11 ... Situation situation input processing part, 12 ... Current power calculation processing part, 13 ... Monitoring cycle judgment processing part, 14 ... Estimated used power calculation part, 15 ... Alarm set value calculation processing part, 16 ...
Predicted power consumption excess determination processing unit, 17: control amount calculation processing unit, 18: control output processing unit, 19: warning guidance output processing unit, 20: notification processing unit to air conditioner user, 30: control target device list, 31: General control target device list,
40: power consumption, 41: demand contract alarm value.

Claims (2)

[Claims] 1. A monitoring device for monitoring power consumption within a power demand contract, an input means for inputting a power usage state and an operation state of each equipment, and a power demand monitoring end based on the input power usage state. Prediction operation means for calculating the predicted power consumption at the time; predicted power consumption excess determination means for determining whether the predicted power consumption does not exceed the demand contract warning value; and Control amount calculating means for calculating a control amount for restricting power consumption when exceeding, alarm guidance means for notifying a supervisor of the excess, and control amount actually controlling for restricting power consumption. A control output unit that incorporates a seasonal element into the selection condition of the device to be controlled when the control is performed. 2. The monitoring apparatus according to claim 1, wherein a monitoring cycle changing means for automatically setting an excess determination cycle of predicted power usage to a short cycle and performing fine monitoring in response to a rapid increase in power usage. Or characterized by temporarily lowering the demand contract alarm value for determining the excess of the predicted power consumption, and temporarily changing the demand contract alarm value so as to be able to respond with a margin when the predicted power consumption is exceeded. Monitoring device.