JP2013210728A - Power monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power monitoring system for supporting efficient power suppression.SOLUTION: In a storage part 27 of a power monitoring device 3, production time using power 41, preparation time using power 42, stop time using power 43, a production scheduled number 45, and the time 36 before production completion of production items 44 calculated from a production speed 45, are stored. Also, the power monitoring device 3 acquires present values of the operation situation of respective production facilities 5 such as "production", "preparation" and "stoppage" from the respective production facilities 5. Then, from the production time using power 41, the preparation time using power 42, the stop time using power 43, the present value of the operation situation of the production facility 5, and the time 36 before the production completion, the using power and operation situation after prescribed time of the respective production facilities are obtained, and they are displayed on a display part 21.

Description

  The present invention relates to a power monitoring system that monitors power in a production facility or the like.

  In recent years, power saving has been performed mainly by large consumers such as buildings and factories due to power shortage. In order to save power, for example, in a power monitoring system, the power received and used by a general electric utility is measured and monitored with a power meter, and the current power used is close to the contract power value or target power value. In such a case, the output of the electric device is suppressed or the power is suppressed such as turning off the power.

  In general, in factories such as the manufacturing industry, air conditioning and chiller / heater equipment account for 30 to 50% of the power used by electrical equipment, and production equipment accounts for 20 to 30%. Therefore, when power suppression is performed in a factory such as a manufacturing industry, the power consumption is controlled by preferentially selecting air conditioning / cooling / heating equipment from the production equipment in order not to reduce the production amount.

  However, since the power used by air conditioning / cooling / heating equipment is affected by the outside air condition, as a result of power suppression, the estimated value indicating the expected power and the actual value indicating the power actually suppressed can be obtained. Differences can occur. Therefore, in order to avoid this, there is a case where power is suppressed by selecting a production facility having a small expected value and actual value.

  In the power monitoring method described in Patent Document 1, a set power amount indicating a measure of the amount of power used by the facility during a predetermined period is acquired, and the amount of power used by the facility from the start of the predetermined period to the present time is measured. A method is disclosed in which the acquired set power amount and the measured used power amount are displayed, and when the used power amount exceeds a reference ratio with respect to the set power amount, the power monitoring device executes the power suppression setting operation. ing.

JP 2006-277131 A

  However, in a manufacturing industry such as the printing industry where many items of small lots and many items are produced with a short production time for one item, the conventional power control method is used in a situation where the power used is close to the contracted power value or the target power value. When the production equipment was selected with the knowledge of the decline in production volume and the power was reduced, the power was reduced because the production items were switched at another production equipment at the same time. However, there is a possibility that there is no need to suppress the power of the production facility, and there is a problem that it is not efficient.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a power monitoring system that supports efficient power suppression.

  In order to achieve the above-mentioned object, a first invention is a power monitoring system for monitoring power consumption of a production facility, the time from the start of production of a production item produced in the production facility to the completion of production, and A storage means for storing power used for each operation status including at least a production state and a production stop state of the production facility, a means for obtaining a current value of the operation status of the production facility, and a power consumption for each operation status, Display means for displaying electric power used after a predetermined time of the production facility, which is obtained based on the current value of the operation status and the time from the start of production to the completion of production of the production item, Power monitoring system.

  As a result, it is possible to predict and display a decrease in power consumption after a predetermined time associated with the completion of production of a production item, and it is possible to efficiently suppress power based on this.

Moreover, it is desirable that the display means displays the operation status after a predetermined time of the production facility, which is obtained based on the current value of the operation status and the time from the start of production of the production item to the completion of production.
Thereby, since the change of the operation condition after the predetermined time accompanying the completion of production of a production item can be grasped easily, it is useful for efficient electric power control.

It is preferable that the time from the start of production of the production item to the completion of production is calculated based on the input planned production number and production speed of the production item.
As a result, it is possible to easily and accurately calculate the time until the production of the production item is completed, and it is possible to accurately predict a decrease in power consumption.

The display means may display a difference between a value obtained by summing current values of power used by the plurality of production facilities and a value obtained by summing power used after a predetermined time of the plurality of production facilities as predicted reduction power. desirable.
As a result, it is easy to grasp the predicted value of the power consumption of the entire production facility and compare it with the current power consumption, which is useful for efficient power suppression.

  The present invention can provide a power monitoring system that supports efficient power suppression.

The figure which shows the outline | summary of the power monitoring system 1 which concerns on embodiment of this invention. The figure which shows the detail of the memory | storage part 27 of the electric power monitoring apparatus 3 The figure which shows an example of the display in the display part 21 of the electric power monitoring apparatus 3 A flowchart showing a flow of processing in the power monitoring system 1 The figure which shows an example of the display in the display part 21 of the electric power monitoring apparatus 3 The figure which shows an example of the display in the display part 21 of the electric power monitoring apparatus 3

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Outline of power monitoring system 1)
FIG. 1 is a diagram showing an overview of a power monitoring system 1 according to an embodiment of the present invention.
This power monitoring system 1 measures and monitors the power used in a printing factory or the like. As shown in the figure, the power monitoring device 3, the production facility 5, the air conditioning chiller / heater facility 7, the main power meter 11, the power It consists of a total of 13 etc.

  The power monitoring device 3 acquires and displays the power consumption and the current value or predicted value of the operating status of the production facility 5 or the like that is the monitoring target of the power monitoring system 1. The power monitoring device 3 includes a display unit 21, a measurement unit 23, an arithmetic processing unit 25, a storage unit 27, and the like.

The display unit 21 displays the current value and predicted value of the power used and the operation status of the production facility 5 and the like. Details of display on the display unit 21 will be described later.
The measuring unit 23 acquires the current value of power used by the production facility 5 and stores it in the storage unit 27.
The arithmetic processing unit 25 performs various calculations necessary for processing of the power monitoring device 3.
The storage unit 27 stores various types of data necessary for processing of the power monitoring device 3 such as the power used by the production facility 5 and the current value of the operation status. Details of the storage unit 27 will be described with reference to FIG.

  The production facility 5 and the air conditioning chiller / heater facility 7 are facilities to be monitored for electric power in the power monitoring system 1.

  The production facility 5 is a facility for producing various items, such as a printing machine and a bookbinding machine. The production facility 5 detects the current value of its operating status and transmits it to the power monitoring device 3. The operating status of the production facility 5 includes, for example, “production”, “preparation”, and “stop” states.

  The operation status “production” is a state in which the production facility 5 is producing production items. For example, when the production facility 5 is a printing press, the operation status “production” indicates that printing is in progress. This can be detected as a state where the button for starting the main printing provided in the printing press is pressed.

  The operation status “stopped” is a state in which production of production items is stopped in the production facility 5. For example, when the production facility 5 is a printing machine, this can be detected as a state where the plate cylinder of the printing machine is not rotating.

  The operation state “preparation” is a state in which the production facility 5 performs adjustment before production items are produced. For example, when the production facility 5 is a printing machine, it is an operation time for performing trial printing and confirming that printing is performed stably and correctly. For example, when the operation status is neither “production” nor “stop”, it can be detected that the operation status is “preparation”.

  The operating status of the production facility 5 only needs to include the states of “production” and “stop”, and the others can be variously determined according to the type of the production facility 5. The operation status detection method may be determined depending on the type of the production equipment 5. For example, in the case of a bookbinding machine, a state where the folding machine or the like is not operating can be determined as “stop”.

  The air conditioning chiller / heater equipment 7 is equipment such as a chiller / heater used for air conditioning in a building such as a factory.

  The main wattmeter 11 measures the power consumption of the entire monitoring target of the power monitoring system 1 such as the production facility 5 and the air conditioning chiller / heater facility 7. The main wattmeter 11 transmits the measured power usage to the power monitoring device 3.

  The wattmeter 13 is installed in the production facility 5 and the air conditioning chiller / heater facility 7 and measures the electric power used by the individual production facility 5 and air conditioning chiller / heater facility 7. The wattmeter 13 transmits the measured power usage to the power monitoring device 3.

  In this embodiment, one wattmeter 13 is installed in each production facility 5 or the like. However, for example, the wattmeter 13 may be installed in each location where power is used in the production facility 5. In this case, the power used by the production facility 5 can be the total power used measured by the plurality of power meters 13. Furthermore, the monitoring target of the power monitoring system 1 is not limited to the production facility 5 and the air-conditioning chiller / heater facility 7, but other electrical devices may be monitored and the wattmeter 13 may be installed.

FIG. 2 is a diagram illustrating details of the storage unit 27 of the power monitoring device 3.
The storage unit 27 stores the target power 31, the power used for each operating status 32, the production item information 33, the production facility operating status 34, the power used 35, the time 36 until the completion of production, and the like.

  The target power 31 is a target maximum power consumption value for the entire monitoring target of the power monitoring system 1, and is, for example, a value that is 80% of contract power in a factory or the like. The target power 31 is set in advance.

  The power usage 32 for each operating status is a value indicating the power used for each production item in each of the operating statuses of “production”, “preparation”, and “stop” of the production facility 5, and when the operating status is “production”. It includes a production-use power 41 indicating the power used, a preparation-use power 42 indicating the use power when the operation status is “preparation”, and a stop-use power 43 indicating the use power when the operation status is “stop”. As these values, values obtained by measuring in advance for each production item are set.

  The production item information 33 is information relating to the production item produced by the production facility 5 and includes a production item 44, a production schedule number 45, a production speed 46, and the like. The production item information 33 is set when production is started in the production facility 5 or when production items are exchanged.

The production item 44 is a name of a production item produced by the production facility 5.
The planned production number 45 is the number of production items 44 produced by the production facility 5.
The production speed 46 is the time required for producing the number of units of the production item 44 in the production facility 5.

  The production facility operation status 34 represents the current value of the operation status of each production facility 5 such as “production”, “preparation”, “stop”, and the like. These operating conditions are received from each production facility 5 at predetermined intervals and acquired.

  The used power 35 is a current value of used power measured by the main wattmeter 11 and the wattmeter 13. These power consumptions are also received and acquired from the main wattmeter 11 and the wattmeter 13 at predetermined intervals.

The time 36 until the completion of production is the time from the start of production of a production item to the completion.
The time 36 until the completion of production is calculated based on the scheduled production number 45 and the production speed 46 by the arithmetic processing unit 25 of the power monitoring device 3. Alternatively, instead of the planned production number 45 and the production speed 46, the time taken from the production start to the production completion of the production item 44 may be directly input and set.

(Display on the display unit 21 of the power monitoring device 3)
FIG. 3 is a diagram illustrating an example of display on the display unit 21 of the power monitoring device 3.

  In the display unit 21, the target power 211 of the entire monitoring target of the power monitoring system 1, the current value 212 of the used power and operating status of the production facility 5, and the used power and operating status of 1 to 3 minutes after the present The predicted value 213 is displayed. Note that the predicted value 213 is not limited to the value after 1 to 3 minutes, and can be determined according to the operation of the power monitoring system 1.

  As the target power 211, the value of the target power 31 of the storage unit 27 of the power monitoring device 3 is displayed.

  The “total power (current value)” of the current value 212 is the current value of the used power 35 of the entire monitoring target measured by the main wattmeter 11.

  The “remaining power (current value)” of the current value 212 is a value obtained by subtracting the “total power (current value)” from the target power 31. If this is large, there is a margin in power, but the closer to 0 there is no margin in power and it is necessary to suppress power.

  The “total power of production facility” of the current value 212 is calculated by adding up the current values of the power consumption 35 of each production facility 5 measured by the wattmeter 13.

“Production facility (1) power” to “production facility (3) power” of the current value 212 are current values of the power consumption 35 of each production facility 5 measured by the wattmeter 13 installed in each production facility 5. .
“Production facility (1) operation status” to “production facility (3) operation status” of the current value 212 are current values of the production facility operation status 34 received from each production facility 5 and acquired by the power monitoring device 3. .

The “remaining until production completion (time)” of the current value 212 is a value indicating the remaining time until the production of the production item produced at each production facility 5 is completed, and the current value 212 of the operation status of the production facility 5 is In the case of “production”, a value obtained by subtracting the time elapsed from the production start time to the present from the time 36 until the production is completed is displayed. In the present embodiment, this is displayed in units of minutes, but is not limited thereto, and may be displayed in units of seconds.
Further, when the current value 212 of the operating status of the production facility 5 is “preparation” or “stop”, the column is blank.

  The prediction value 213 “current production facility total power to expected reduction power” is obtained by subtracting the prediction value 213 “production facility total power” from the current value 212 “production facility total power”. This “production facility total power” is the sum of “production facility (1) power” to “production facility (3) power” of predicted values 213 to be described next.

The predicted values 213 of “production facility (1) power” to “production facility (3) power” are used power of each production facility 5 predicted after a predetermined time (1 minute, 2 minutes, 3 minutes in this embodiment). It is.
In the present embodiment, when the current value 212 of the operation status of the production facility 5 is “production”, if the predetermined time is less than the “remaining time until production (time)” value of the current value 212, the production facility 5 If the above-mentioned electric power used during production 41 is displayed and the predetermined time is equal to or greater than the value of “remaining until production completion (time)” of the current value 212, the production item is produced. The power consumption 43 at the time of stop is displayed on the assumption that has been completed.
When the current value 212 of the operating status of the production facility 5 is “preparation” or “stop”, the preparation-use power 42 or the stop-use power 43 is displayed as described later.

The predicted values 213 of “production facility (1) operation status” to “production facility (3) operation status” are predicted for each production facility 5 predicted after a predetermined time (1 minute, 2 minutes, 3 minutes in this embodiment). The operating status.
In the present embodiment, when the current value 212 of the operation status of the production facility 5 is “production”, if the predetermined time is less than the “remaining time until production (time)” value of the current value 212, the production facility 5 “Production” is displayed on the assumption that the production of the production item is continued. If the predetermined time is equal to or greater than the current value 212 “remaining until production completion (time)”, the production of the production item is finished. “Stop” is displayed.
When the current value 212 of the operating status of the production facility 5 is “preparation” or “stop”, the same value is displayed.

The “remaining time until production completion (time)” of the predicted value 213 is the remaining time until the production of the production item of each production facility 5 is completed after a predetermined time (1 minute, 2 minutes, 3 minutes in the present embodiment). .
In the present embodiment, when the current value 212 of the operation status of the production facility 5 is “production”, if the predetermined time is less than the “remaining time until production (time)” value of the current value 212, the production facility 5 The value obtained by subtracting the predetermined time from this value is displayed on the assumption that the production of the production item is continued. If the predetermined time is equal to or greater than the current value 212 “remaining until production completion (time)”, it is left blank as the production of the production item is finished.
If the current value 212 of the operating status of the production facility 5 is “preparation” or “stop”, this field is blank.

(Processing flow in the power monitoring system 1)
Next, a processing flow in the power monitoring system 1 will be described with reference to FIG. Here, the flow from the start of production to the end of operation of the production facility 5 displayed in the column A of FIG. 3 will be described.

  As shown in FIG. 4, when starting production of a production item by the production facility 5, the operator creates, as production item information 33, a production item 44, a planned production number 45, a production speed 46 for the production item to be newly started. Enter. The power monitoring apparatus 3 stores the input production item information 33 in the storage unit 27 (S101).

  In the power monitoring system 1, the measurement unit 23 of the power monitoring device 3 acquires the current power consumption of the entire monitoring target and the power consumption of each production facility 5 from the main power meter 11 and the power meter 13, and uses the power consumption. 35 is stored in the storage unit 27. Furthermore, the power monitoring apparatus 3 receives and acquires the current value of the operation status from each production facility 5, and stores it in the storage unit 27 as the production facility operation status 34 (S102).

  Based on these pieces of information, the power monitoring device 3 displays the current value 212 and the predicted value 213 on the display unit 21 as described above (S103).

  An example of the display unit 21 is shown in FIG. Here, it is assumed that production by the production facility 5 has not yet started, and the production facility operation status 34 is “stopped”. In this case, as described above, as the “production facility (1) operation status” to “production facility (3) operation status” of the predicted value 213, the same “stop” as the current value 212 is displayed, and “production facility ( As “1) Electricity” to “Production Equipment (3) Electricity”, the power consumption 43 at the time of stop corresponding to the production item 44 input in S101 is displayed. “Remaining until production completion (time)” is blank for both the current value 212 and the predicted value 213.

  Next, when the production facility 5 enters the production preparation stage, the production facility operation status 34 becomes “preparation”, and the current value 212 of the operation status becomes “preparation” as shown in FIG. Also in this case, the same “preparation” as the current value 212 is displayed as “production facility (1) operation status” to “production facility (3) operation status” of the predicted value 213 as in the case of “stop” described above. In addition, as “production equipment (1) power” to “production equipment (3) power”, the preparation-use power 42 corresponding to the production item 44 input in S101 is displayed. “Remaining until production completion (time)” is also blank in both the current value 212 and the predicted value 213.

  The display as described above is performed until the production of the production item by the production facility 5 is started (S104; No), but the production is started and the production facility operation status 34 becomes “production” (S104; Yes). Then, the arithmetic processing unit 25 calculates and acquires the planned production number 45 and the production speed 46 from the production speed 46 input in S101 and stores them in the storage unit 27. Then, the current value 212 is displayed as “remaining until production completion (time)” (S105). FIG. 3 shows the display unit 21 in this state. As described above, the predicted value 213 of “remaining until completion of production (time)” after a predetermined time is calculated by subtracting the predetermined time from the current value 212, and the like. The display of other parts is also performed as described above.

  When the “remaining power (current value)” is equal to or less than a predetermined value (S106; Yes), the power monitoring device 3 issues a warning to notify the operator of this (S107). For example, when the “remaining power (current value)” is 10% or less of the target power 31, a warning is displayed on the display unit 21 of the power monitoring device 3, or a warning sound is output by a speaker (not shown). .

When the operator recognizes that there is no margin in power by warning, whether or not there is a production facility 5 that will complete production within a certain time by checking the predicted value 213 displayed on the display unit 21 of the power monitoring device 3. In addition, when there is the production facility 5 for which production is completed, it is possible to immediately know how much power consumption is reduced. If there is a production facility 5 in which production is completed within a certain time and the power to be reduced by this is large, it can be determined that it is not necessary to suppress the power of the production facility 5.
For example, according to the predicted value 213 in FIG. 3, it can be seen that “production equipment (3)” finishes processing in the remaining 2 minutes, thereby reducing the power consumption by 60 kW. Can do.

  Conversely, if there is no production facility 5 that completes production within a certain time, or even if there is a small reduction in power consumption, some kind of power suppression is required, such as intentionally stopping the production facility 5 during production. It can also be determined. For example, it is also possible to determine which production facility 5 is to be stopped with reference to the power consumption and operating status of each production facility 5 displayed on the display unit 21.

  In this way, until the production of the production item is completed (S108; No), the processing after S102 is repeated, and the production of the production item is completed (S108; Yes). Subsequently, when another production item is produced (S109; No), the production item information 33 is input again for the new production item (S101), and the processes after S102 are repeated. In this way, the production of all production items in the production facility 5 is completed (S110; Yes).

  As described above, in the power monitoring system 1 according to the present embodiment, it is possible to predict and display a decrease in power consumption or a change in the operation status of the production facility 5 after a predetermined time associated with the completion of production of a production item. Therefore, it becomes possible to efficiently suppress power based on this.

  Further, the time 36 until the production of the production item is completed is calculated based on the estimated number of production 45 and the production speed 46, so that the time until the production of the production item is completed can be calculated easily and accurately. It is possible to accurately predict a decrease in power consumption.

  Further, the display unit 21 displays the difference between the current value 212 and the predicted value 213 of “total power of production facilities” obtained by summing up the power used by each production facility 5 as “the amount of predicted reduced power from the current total power of production facilities”. Therefore, it becomes easy to grasp the predicted value of the power consumption of the entire production facility 5 and compare it with the current power consumption, which is useful for efficient power suppression.

  In the present embodiment, the “production facility (1) power” to “production facility (3) power” of the current value 212 described in FIG. However, for example, it is possible to set the value of the used power 32 for each operating status corresponding to the current value of the operating status of each production facility 5.

  In addition, “production facility (1) power” to “production facility (3) power” of the predicted value 213 described in FIG. 3 are “production facility (1) operating status” to “production facility (3)” of the predicted value 213. Although the value of the used power 32 for each operating status corresponding to the “operating status” is used, if the current value 212 of the operating status and the predicted value 213 are the same, the “production facility (1)” of the current value 212 measured by the wattmeter 13 The values of “power” to “production facility (3) power” may be displayed as they are.

  In addition, depending on the type of the production facility 5, the value of the used power 43 at the time of stoppage of the used power 32 for each operation status may be constant regardless of the production item.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these naturally belong to the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 1 ......... Power monitoring system 3 ......... Power monitoring apparatus 5 ......... Production equipment 21 ......... Display part 27 ......... Storage part

Claims (4)

A power monitoring system for monitoring power consumption of production equipment,
Storage means for storing a time from a production start to a production completion of a production item to be produced in the production facility, and power used for each operation status including at least a production state and a production stop state of the production facility;
Means for obtaining a current value of the operating status of the production facility;
Display means for displaying power used after a predetermined time of the production facility, obtained based on the power used for each operating status, the current value of the operating status, and the time from the start of production to the completion of production of the production item; ,
A power monitoring system comprising:   The display means displays an operation status after a predetermined time of the production facility, which is obtained based on a current value of the operation status and a time from the start of production to the completion of production of the production item. Item 4. The power monitoring system according to Item 1.   3. The power monitoring according to claim 1, wherein the time from the start of production of the production item to the completion of production is calculated based on the input planned production number and production speed of the production item. system.   The display means displays a difference between a value obtained by summing current values of power used by the plurality of production facilities and a value obtained by summing power used after a predetermined time of the plurality of production facilities as an expected reduction power. The power monitoring system according to any one of claims 1 to 3, wherein the power monitoring system is characterized.

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