JP4091504B2 - Electric power demand monitoring system - Google Patents

Description

  The present invention relates to a power demand monitoring system that can connect a power demand monitoring device to a communication network, collect data efficiently, and appropriately provide and notify information even when a plurality of power demand monitoring devices are in a remote place. About.

  For example, the power usage status measured at the power receiving / transforming equipment installed in factories and buildings and the operating status of each equipment device can be obtained from an office located away from the power demand monitoring equipment installed near the power receiving / transforming equipment. It is managed collectively.

  Here, the power demand monitoring device constantly monitors the demand value (average power within a certain period of time), and outputs a warning if there is a risk of exceeding a preset demand value (such as contract power). It is intended to alert the user and monitor the demand value so that it does not exceed the demand value.

This type of demand monitoring device includes an input means for inputting the power usage status and the operating status of each equipment device, and at the end of power demand monitoring from the power usage status and the operating status of each equipment equipment input by this input means. Predicted power consumption calculating means for calculating the predicted power consumption, and power excess determining means for determining whether or not the predicted power consumption calculated by the predicted power consumption calculating means exceeds the demand contract alarm value. When the predicted power consumption exceeds the demand contract warning value by the power excess determination means, the warning guidance means notifies the monitor to that effect, and when the power consumption is limited, the control target There is a control output means that incorporates seasonal factors into equipment selection conditions and monitors the power usage within the power demand contract. For example, Patent Document 1).
JP 2000-184590 A

  However, since the conventional power demand monitoring device is not connected to the office or the like by a communication network, in order to know the detailed power amount, the power demand monitoring device in which the power amount data is stored is used. I had to go to the site to get the data.

  Further, since the communication means, range, and amount of information provided for alarm guidance are limited, there are restrictions on time and place in order to know detailed information.

  Therefore, the present invention connects a power demand monitoring device to a communication network, and even when there are a plurality of power demand monitoring devices in a remote location, data can be efficiently collected, and information is provided and notified appropriately. An object of the present invention is to provide a power demand monitoring system capable of efficiently performing power demand monitoring regardless of time and place.

The invention corresponding to claim 1 is an electricity amount acquisition means for acquiring the amount of power of a power demand monitoring target device, a current amount of electricity from the amount of electricity acquired by the electricity amount acquisition means, and predicted power at the end of demand monitoring. And when the predicted power is predicted to exceed a preset power demand value, arithmetic processing means for outputting a plurality of alarm levels according to the degree, and data of the arithmetic processing means And data storage means for storing the setting data, and when the data from the arithmetic processing means is determined to be an event, the data output is controlled based on the preset data output setting value and the data notification A data output judging means with a data transmission control function that suppresses the transmission of unnecessary data and the frequent occurrence of data by setting the transmission conditions of the network, and the function to connect to the network And a data output means for outputting the data of the arithmetic processing means when controlled by the data output judging means and the data transmission control function is judged to be data transmission, a demand graph display means, an event history for displaying past events A display means, a device abnormality display means for displaying the current power demand monitoring state, and a setting value management means for outputting a setting value currently set when there is a setting value setting request and capable of changing the setting value by a browser. The data stored in the data storage means is transmitted as a power demand monitoring graph provided from the demand graph display means as display data to the information terminal device, and data setting for the data output determination means is possible a power demand monitoring device that includes a display unit, a display hand of the power demand monitoring device Wherein by the data display request via the communication network, the power demand data viewable incorporate direct monitoring device, and sets the setting value of the power demand monitoring device, it can be changed and the information terminal device to The power demand monitoring device is configured to connect to the information terminal device via the communication network when an event such as a power demand value excess warning or a periodic report of the power demand value occurs by the function of connecting to the network. The alarm state and the current and past power demand values are notified by selecting an event from the information terminal device.

According to a second aspect of the present invention, in the power demand monitoring system according to the first aspect of the present invention, the power demand monitoring device is provided with self-diagnosis means for diagnosing the presence or absence of an abnormality such as a self failure or a power failure. If it is diagnosed by the means that there is an abnormality in the power demand monitoring device, the information terminal device is notified via the communication network.

According to a third aspect of the present invention, in the power demand monitoring system according to the first aspect of the present invention, the data output judging means of the power demand monitoring device is provided with a data periodic transmission function so that data can be transmitted at regular intervals. Enable notification and transmission.

According to a fourth aspect of the present invention, in the power demand monitoring system according to the third aspect of the present invention, the data notification and the transmission date and time are set in the data periodic transmission function, whereby the data notification is performed at the transmission date and time. , Enable transmission.

According to a fifth aspect of the invention, in the power demand monitoring system of the first aspect of the invention, the demand graph display means is provided with a function of displaying a linear graph of expected power consumption so that the expected power can be easily grasped. Is.

The invention corresponding to claim 6 is the power demand monitoring system of the invention corresponding to claim 1 , wherein the demand graph display means has a scale changing function for automatically changing a scale attached to the power demand monitoring graph, and All the display data of the power demand monitoring graph is displayed on the information terminal device.

The invention corresponding to claim 7 is the power demand monitoring system of the invention corresponding to claim 1 , wherein the demand graph display means has a power amount display function for each collection interval, and the information terminal device collects power amount data. The amount of power for each interval is displayed.

  According to the present invention, even when there are a plurality of power demand monitoring devices and they are in a remote place, data can be efficiently collected, information is appropriately provided and notified, and power demand monitoring is performed regardless of time and place. Can be provided efficiently.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a configuration example of an entire management system for a receiving and substation to which a power demand monitoring system according to the present invention is applied will be described with reference to FIG.

  In FIG. 1, the high-voltage receiving substation A has a configuration in which the received power is stepped down by a plurality of transformers and can be supplied and distributed from a feeder for each facility group.

  For the entire power demand monitoring, the power of the power receiving point transformer (MOF) is extracted from the watt hour meter WH as a pulse signal and input to the power demand monitoring device C. As for the lines connected to each of the equipment groups 1 to 10, the pulse signal is taken out from the watt hour meter WH and input to the power demand monitoring device C as described above.

  This power demand monitoring device C measures the amount of power of the above-mentioned power receiving / transforming equipment in real time, provides a simple statistics / recording function, a web server function that enables measurement data to be viewed on a general-purpose browser, and measurement data It also has a function to notify and distribute alarms by monitoring and e-mail.

  On the other hand, the management office B apart from the receiving substation has a mail server and a PC (general-purpose browser Web management), and real-time information on power demand measured by the power demand monitoring device C is accessed via the network N. It is possible to browse from a general-purpose Web browser by simply doing.

  The above is the configuration of the entire management system having the power demand monitoring function.

  FIG. 2 is a block diagram showing a first embodiment of the power demand monitoring system according to the present invention provided in the management system of the substation / substation.

  2, the power demand monitoring system includes an information terminal device 11 (corresponding to the PC in FIG. 1), a communication network 12 (corresponding to N in FIG. 1), and a power demand monitoring device 13 (corresponding to the power demand monitoring device in FIG. 1). ), And a power demand monitoring target device 14 (corresponding to the power receiving / transforming equipment in FIG. 1).

  FIG. 3 is a block diagram showing a configuration of the power demand monitoring apparatus 13.

  In FIG. 3, reference numeral 21 denotes a pulse count unit that takes in a pulse signal output from the watt hour meter of the power demand monitoring target device 14 for every fixed period and counts the number of pulses, and 22 is counted by the pulse count unit 21. An arithmetic processing unit that calculates the current power amount, predicted power, etc. from the number of pulses and a preset pulse constant, composite transformation ratio, etc., and obtains a power demand excess predicted value, 23 is data from the arithmetic processing unit 22, A data output determination unit 24 that controls data output based on a preset data output setting value, 24 is a contact output and a communication network based on the output determination result of the data output determination unit 23, data of the arithmetic processing unit 22, which will be described later The data output unit outputs the data stored in the data storage unit 27.

  In addition, by providing a server function of the Internet technology 25, the data of the power demand monitoring device 13 is displayed as a graph or a numerical value on the information device terminal 11 via the communication network, and from the information device terminal 11 to the power demand monitoring device 13 The display unit 26 is capable of data setting, and 26 is a self-diagnosis unit that self-monitors a failure or a power failure of the power demand monitoring apparatus itself.

  Reference numeral 27 denotes a data storage unit that stores data of the arithmetic processing unit 22, monitoring data of the self-diagnosis unit 26, display data of the display unit 25, and setting data.

  Next, the operation of the power demand monitoring apparatus 13 configured as described above will be described.

  The power demand monitoring device 13 always counts pulses for a fixed period every fixed period by a pulse count unit 21 and performs a prediction calculation of power demand based on the pulse count number for a fixed period by an arithmetic processing unit 22. To do. This prediction calculation employs a known prediction calculation method, and is performed using current power, predicted power, and adjusted power calculated by pulse count, and preset target power, adjusted power, and limit power.

  Here, the details of the prediction calculation will be described with reference to the power demand prediction graph shown in FIG.

  In FIG. 4, the predicted power representing the power value that will be reached at the end of the time period depending on the power usage situation from the start of the demand time period is obtained by the following equation.

Predicted power (kW) = current power (kW) + (Δp (kW) / Δt (min)) × remaining time (min)
Where Δp is the power (kW) increased in t minutes, and Δt is the pulse integration time (minutes).

  Further, the adjustment power representing the power necessary for matching the power used and the target power at the end of the time limit is obtained by the following equation.

Adjustment power (kW) = (Demand time limit (minutes) / Remaining time (minutes)) × (Predicted power (kW) −Target power (kW))
And excess prediction is implemented using these prediction electric power and adjustment electric power.

  Note that the reference power is obtained by the following equation, with the target power as a final value, increasing in proportion to the elapsed time within the time limit, and serving as a reference for the power used.

Reference power (kW) = target power (kW) x elapsed time (minutes) / demand time limit (minutes)
Further, the arithmetic processing unit 22 determines the power usage status using the current power, the predicted power, the adjusted power, and the reference power obtained by the above-described calculation, and the first-stage alarm, the second-stage alarm, the limit Alarms are output in three stages of alarms.

  Here, the output conditions of each alarm will be described with reference to FIG.

  As shown in FIG. 5 (a), the first stage alarm is, for example, when the current power is greater than or equal to the reference power and the predicted power is greater than or equal to the target power when the time is from 25 minutes to the end of the time limit. In case of predicted power ≥ target power, an alarm output is issued for each, and as a condition for release, the second alarm is released, and if current output <reference power and predicted power <target power Is done.

  As shown in FIG. 5 (b), the second-stage alarm is based on the condition that the first-stage alarm is output, and when adjustment power ≧ control power (control power: controllable power of a preset load) An alarm output is issued and the release condition is released when the predicted power is less than the target power.

  As shown in FIG. 5C, the limit alarm is issued when the current power is greater than or equal to the limit alarm line, and the release condition is that the current power <the limit alarm line is maintained for, for example, 1 minute (limit alarm line: preset) Power that cannot be controlled (limit power) and the target power) is released.

  In this way, the data output determination unit 23 determines the power usage state so that the demand value does not exceed the target power, and the data output unit 24 outputs an alarm in three stages of the first stage alarm, the second stage alarm, and the limit alarm. From the contact output and communication network, the adjustment of the load power is notified.

  On the other hand, when there is a data request from the communication network, the data display unit 25 receives the request and uses the data stored in the data storage unit 27 to send the request data to the browser of the information terminal 11. It has a function to display.

  Here, the configuration of the data display unit 25 will be described with reference to FIG.

As shown in FIG. 6, the data display unit 25 includes a past power demand graph display unit 31 that displays a past demand value graph, a demand excess prediction graph display unit 32 that displays a current power demand excess prediction graph, and a power demand monitor. Event history display means 33 for displaying past events that have occurred in the apparatus, apparatus abnormality display means 34 for displaying the current state of the power demand monitoring apparatus from the self-diagnosis unit 26, and if there is a setting value setting request, A setting value management unit 35 is provided that allows the setting value set in the power demand monitoring apparatus to be displayed on the information device terminal 11 and can be changed by the browser of the information device terminal 11.
The set values such as the target power, the adjusted power, the limit power, the pulse constant, and the composite transformation ratio described above are set by the set value management means 35.
The set value management means 35 arbitrarily sets a data transmission destination and an event for which data is to be transmitted, so that data is transmitted via the communication network 12 only when a selected event occurs. The data transmission destination setting screen can be displayed on the browser of the information equipment terminal 11.

FIG. 7 shows a data transmission destination setting screen displayed on the browser.
From the data transmission destination setting screen, an event desired to be notified as a data transmission destination is arbitrarily set from the information device terminal 11 to the power demand monitoring apparatus 13 via the communication network 12.

  That is, in FIG. 7, the communication means and the communication destination are input to the notification destination input area 41 of the data transmission destination setting screen, and the notification event is arbitrarily selected in the notification event selection area 42.

  The data output determination unit 23 compares the generated event from the arithmetic processing unit 22 or the self-diagnosis processing unit 26 with the data to which the data transmission destination is set, and outputs only the matching event, thereby selecting the selected event. Only when this occurs, data is transmitted via the communication network 12.

  For example, when the data communication means is an e-mail, an e-mail address xx @ x is input into # 1 of the notification destination input area 41, and an e-mail address YY @ Y is input into # 2 of the notification destination input area 41. For the address xx @ x, select only the limit alarm from the notification events in the notification event selection area 42 (first stage alarm, second stage alarm, limit alarm, power failure, etc.) and send it to the email address YY @ Y On the other hand, if the first-stage alarm and the limit alarm are selected, even if the first-stage alarm and second-stage alarm events occur for the e-mail address xx @ x, the e-mail notification is not performed. Notify by e-mail only when a limit alarm occurs.

  Further, the first-stage alarm and the limit alarm are notified to the e-mail address YY @ Y. In the data output destination setting, a notification event can be arbitrarily selected for each power demand device.

The self-diagnosis unit 26 self-monitors an event such as a failure or a power failure of the power demand monitoring device itself at a fixed period, and when an event occurs, the event occurrence record is saved in the data saving unit 27, and the event occurrence information is stored as data. Output to the output determination unit 23.
The data output determination unit 23 uses the calculation result of the calculation processing unit 22 and the self-diagnosis result of the self-diagnosis unit 26 to determine the data transmission event. If it is determined from the determination result that an event has occurred, the data transmission setting for the event is acquired from the set value management means 35 of the data display unit 26, and the presence / absence of data output is determined. The determination of the presence or absence of data output is output to the data output unit 24.

  The data storage unit 27 stores setting values, past demand values, and past event occurrence records. In this case, the data can be compressed and stored.

The data output unit 24 outputs data when the data output determination unit 23 determines that the data is output. The contact output of the data output unit 24 is connected to an alarm box or the like, and can be used as a means for notifying an alarm in real time by a lamp or buzzer of the alarm box or for controlling the connected device. The communication network output of the data output unit 24 is transmitted using the data of the data storage unit 27 or the setting value management unit 35 of the data display unit 25 when the data output determination unit 23 determines the data transmission. Create data.
Thereafter, the data output unit 24 notifies the information terminal device 11 of data via the communication network 12. By transmitting compressed data during communication, communication costs can be reduced.

  As described above, it is possible to easily and efficiently monitor the power demand simply by installing the power demand monitoring device 13 and connecting to the communication network 12 to construct a power demand monitoring system.

  In the above-described embodiment, when there are a plurality of power demand monitoring target devices, or a server is installed to manage a large amount of data, the efficiency of power demand monitoring can be increased.

  Furthermore, the power demand monitoring device 13 can also monitor power demand of a plurality of power demand monitoring target devices with respect to one power demand monitoring device.

  As described above, according to the present embodiment, a power demand monitoring device is installed, connected to a communication network, and only a power demand monitoring system is constructed, so that appropriate information notification, remote data acquisition, and power demand monitoring are performed. The labor required for setting the apparatus is reduced, and it is possible to construct a power demand monitoring system that is not limited by time and place.

  In the above embodiment, the connection between the power demand monitoring apparatus 13 and the communication network 12 can be easily established regardless of the type of wired or wireless, and detailed data such as e-mail and FAX can be used as information notification means. Includes all means that can be transmitted by the information terminal device.

  Next, a second embodiment of the power demand monitoring system according to the present invention will be described.

  In the second embodiment, in the power demand monitoring apparatus shown in FIG. 3, the data output determination unit 23 is provided with a data transmission control function, and the other configurations are the same as those in the first embodiment. .

  In the conventional power demand monitoring device, data output is given only to the lamp and buzzer, so transmission control is not necessary. However, when outputting data to a communication network, troublesomeness due to frequent e-mails and communication costs Therefore, it is necessary to control the data output.

  Therefore, data transmission conditions are set for the data to be transmitted, and the data output determination unit 23 determines the presence or absence of data transmission according to the data transmission conditions, thereby preventing frequent data transmission and useless data transmission. Automatic transmission is possible.

  The power demand excess prediction predicts whether or not a preset power value (target power) is exceeded so as not to exceed the contracted power amount, and outputs an alarm if there is a risk of excess. The excess prediction is calculated by the arithmetic processing unit with the current power calculated by the pulse count, the preset target power, the adjusted power, and the limit power. In this case, using the predicted power that represents the power value that will be reached at the end of the time period depending on the power usage status from the start of the demand time period, and the adjustment power that represents the power required to match the used power and the target power at the end of the time period carry out. The excess alarm is output in three stages of a first-stage alarm, a second-stage alarm, and a limit alarm according to the power usage status.

  When transmitting data over a communication network, the power demand excess prediction is based on the power usage situation, so that warnings may occur frequently in a short period of time and a large amount of useless data may be transmitted. It is necessary to optimize the transmission of data by warning.

  Here, the data transmission condition by the power demand excess warning will be described with reference to the flowchart shown in FIG.

  First, each alarm (first alarm, second alarm, limit alarm) obtained by the power excess prediction calculation and determination process (S1) has a pre-transmission condition that it is a continuous output over a certain period of time. If the conditions are not cleared, data transmission is not performed (S2), (S5), and (S8).

  Next, the alarm lock time is set for each alarm after the alarm is transmitted to prevent unnecessary data transmission. In other words, the alarm data is transmitted via the communication network when the alarm output determination unit 23 of the power demand monitoring device 13 satisfies the pre-transmission condition and the alarm lock is released (S3). ), (S6), (S9). In addition, priority is set for alarm output in the order of limit alarm, second-stage alarm, and first-stage alarm, and high-priority alarms satisfy the pre-transmission conditions regardless of the low-priority alarm lock time. When the alarm lock is released, an alarm is sent. If an alarm with a higher priority than an alarm that is locked during the alarm lock time is output, the alarm lock time for the alarm with a higher priority is set for the alarm with a lower priority. During the alarm lock time, an alarm with a low priority is not output (S4), (S7), and (S10).

  By setting the above conditions, it is possible to prevent unnecessary data transmission and optimize the alarm transmission in consideration of the priority.

  Here, an example of data transmission conditions by the power demand excess warning will be described with reference to FIG.

  The first-stage alarm is output for a certain period or more, and the first-stage alarm mail is transmitted at 0:15.

Next, it is assumed that the second stage alarm mail is output at 0:16, one minute later, and the limit alarm mail is output after one minute.
Since a high priority alarm output does not depend on a low priority alarm output lock, such an output is possible. And when the output lock time of each alarm is set to 5 minutes, the alarm lock time with low priority is applied while the alarm with high priority is locked. Both the stage alarm and the alarm output are locked until 0:22 when the output lock of the limit alarm is released. After 0:22, check the alarm output for a certain period again and execute the alarm output.
Thus, by providing a data transmission control function in the data output determination unit 23 of the power demand monitoring apparatus 13 shown in FIG. 3, frequent data generation and useless data transmission can be prevented, and only necessary information can be obtained appropriately. This enables efficient power demand monitoring.

  Next, a third embodiment of the power demand monitoring system according to the present invention will be described.

  In the third embodiment, in the power demand monitoring apparatus shown in FIG. 3, the data output determination unit 23 is provided with a fixed period transmission function for automatically transmitting data at a fixed period. This is the same as the embodiment.

  With such a configuration, the power demand monitoring device 13 can notify and transmit data to the information terminal device 11 at regular intervals via the communication network 12. In this case, the date and time for data notification and transmission can be arbitrarily set by the setting value management means 35 of the data display unit 25 of the power demand monitoring apparatus 13 from the information terminal device 11.

For example, when transmitting demand monthly report data, if the data transmission date is set, the transmission date is determined in the transmission determination process of the data output determination unit 23, and when the data transmission date is reached, the past of the data storage unit 27 is automatically set. One month of data can be acquired from the data, a monthly report can be created, and the monthly report can be transmitted.
As described above, by providing the data output determination unit 23 of the power demand monitoring apparatus 13 shown in FIG. 3 with a fixed period transmission function for automatically transmitting data at a fixed period, necessary information can be obtained reliably and efficient power demand. Monitoring is possible.

  Next, a fourth embodiment of the power demand monitoring system according to the present invention will be described.

  In the fourth embodiment, in the power demand monitoring apparatus shown in FIG. 3, the data display unit 25 is provided with means for providing a high-performance power demand monitoring graph. This is the same as the embodiment.

  This power demand monitoring graph is provided by the demand excess prediction display means 32 of the data display unit 25.

FIG. 10 shows an outline of the demand excess prediction graph. The demand excess prediction graph selects a detailed data display area for numerically displaying current power, predicted power, adjustment power, target power, and the like, and data to be displayed on the graph. It consists of a display selection area and a demand excess prediction graph display section.
The demand excess prediction graph display unit is a demand curve that displays the accumulated power consumption within the demand time period, a reference power that serves as a reference for reaching the target power at the end of the demand time period, and a limit alarm line that is determined by a preset limit power Consists of.
A highly functional power demand excess prediction graph that enables display of various detailed data and graphs on the power demand excess prediction graph is provided.

  A high-function power demand monitoring graph provided by the power demand monitoring apparatus 13 to the information terminal device 11 will be described with reference to FIGS. 11 to 13.

  In the power demand monitoring graph, it is important to grasp the predicted power in the power demand excess prediction.

  The power demand monitoring graph of the present embodiment can display the predicted power at the end of the power demand time period calculated by the arithmetic processing unit so that the predicted power can be easily grasped as a straight line graph 81 in FIG. This line graph 81 can be displayed or hidden by a check box or the like in the display selection area.

It is conceivable that the current power and the predicted power vary greatly depending on the power usage status.
In addition, the power demand monitoring graph of the present embodiment is all displayed in the graph even when the above-mentioned predicted power or current power exceeds the full scale of the power demand monitoring graph due to power usage. Thus, the scale of the graph 91 in FIG. 12A is automatically changed as indicated by 92 in FIG.

  This automatic change of the scale is realized by checking the current power when the graph is displayed by the demand excess prediction graph display means 32 and creating a graph with 1.2 times the current power as a full scale. If 1.2 times the current power is less than or equal to the target power, the full scale is 1.2 times the target power.

  Furthermore, the power demand monitoring graph of this embodiment can also display the power amount at each power amount data collection interval as the bar graph 101 of FIG. Display or non-display can be selected by a check box or the like in the display selection area.

  The scale of the bar graph to be displayed is different from the scale of the currently displayed power demand monitoring graph, and the scale considering the maximum power for each data collection interval is the display size of the power demand monitoring graph. 32.

  Conventionally, since a graph or the like has been displayed by a CRT or the like at the place where the power demand device is installed, it has been difficult to display a high-performance graph as described above, but the power demand monitoring graph of the power demand monitoring device of the present invention is used. As a result, the power demand can be monitored in more detail at a remote location.

  Necessary information is required from the high-performance power demand monitoring graph by adding an expected power graph display function, an automatic scale change function, and a power display function for each collection interval to the power demand monitoring graph of the power demand monitoring device 13. It can sometimes be obtained and enables efficient power demand monitoring.

  Thus, by adding the expected power consumption graph display function, the automatic scale change function, and the power display function for each collection interval to the power demand monitoring graph, the necessary information can be obtained from the high-performance power demand monitoring graph when necessary. This enables efficient power demand monitoring.

The block diagram which shows an example of the whole energy management system of the substation to which the electric power demand monitoring system by this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows 1st Embodiment of the power demand monitoring system by this invention. The block diagram which shows the structure of the electric power demand monitoring apparatus in the embodiment. The figure which shows the electric power demand prediction graph for demonstrating the detail of the prediction calculation in the arithmetic processing part of the electric power demand monitoring apparatus in the embodiment. The figure which shows the graph for demonstrating the output conditions of the alarm issued from the arithmetic processing part of the electric power demand monitoring apparatus in the embodiment. The block diagram of the data display part of the electric power demand monitoring apparatus in the embodiment. The figure which shows the data transmission destination setting screen displayed on a browser in the same embodiment. The flowchart for demonstrating the transmission conditions of the data by the power demand excess warning in the 2nd Embodiment of this invention. The time chart which similarly shows an example of the transmission condition of the data by an electric power demand excess warning. The figure which shows the outline | summary of a demand excess prediction graph in the 4th Embodiment of this invention. The figure which shows the electric power demand excess prediction graph at the time of displaying estimated electric power in the same embodiment. Similarly, the figure which shows a power demand excess prediction graph in case the present electric power has exceeded far full scale by the use condition of electric power. The figure which shows the electric power demand excess prediction graph at the time of displaying the electric energy for every collection interval similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Information terminal device, 12 ... Communication network, 13 ... Electric power demand monitoring apparatus, 14 ... Electric power demand monitoring object apparatus, 21 ... Pulse count part, 22 ... Arithmetic processing part, 23 ... Data processing part, 24 ... Data output part, 25 ... Data display section, 26 ... Self-diagnosis section, 27 ... Data storage section, 31 ... Past demand graph display means, 32 ... Excess demand prediction graph display means, 33 ... Event history display means, 34 ... Device abnormality display means, 35: Setting value management means.

Claims (7)

The amount of electricity acquisition means for acquiring the amount of power of the power demand monitoring target device, the current amount of electricity and the predicted power at the end of demand monitoring are calculated from the amount of power acquired by the amount of electricity acquisition means, and the predicted power is calculated in advance. Arithmetic processing means for outputting a plurality of stages of alarm levels according to the degree when it is predicted that the set power demand value is exceeded, and data storage means for storing data and setting data of the arithmetic processing means If the data from the arithmetic processing means is determined to be an event occurrence, the data output is controlled based on the preset data output setting value, and the data notification transmission condition is set, which is unnecessary. Data output determination means having a data transmission control function for suppressing transmission of frequent data and frequent occurrence of data, and the data output determination means having a function of connecting to a network Data output means for outputting the data of the arithmetic processing means when controlled and determined to be data transmission by the data transmission control function, demand graph display means, event history display means for displaying past events, current power demand When there is an apparatus abnormality display means for displaying a monitoring state and a setting value setting request, a setting value management means for outputting a setting value currently set and changing a setting value by a browser is provided, and the data storage means A power comprising: a power demand monitoring graph provided from the demand graph display means as stored data as display data to the information terminal device; and a display means capable of setting data for the data output determination means A demand monitoring device;
By making a data display request to the display means of the power demand monitoring device via the communication network, the data of the power demand monitoring device can be directly read and viewed, and the setting value of the power demand monitoring device is set. It is composed of information terminal devices that can be changed ,
The power demand monitoring device is connected to the network, and when an event such as a power demand value excess warning or a periodic report of power demand value occurs, the information terminal device is alerted via the communication network, A power demand monitoring system, wherein a past power demand value is notified by selecting an event from the information terminal device. 2. The power demand monitoring system according to claim 1, wherein the power demand monitoring device is provided with self-diagnosis means for diagnosing whether there is an abnormality such as a self-failure or a power failure, and the self-diagnosis means diagnoses that there is an abnormality in the power demand monitoring device. If so, the power demand monitoring system, which notifies the information terminal device via the communication network. 2. The power demand monitoring system according to claim 1 , wherein the data output judging means of the power demand monitoring device has a data periodic transmission function so that data can be notified and transmitted at a regular period. Power demand monitoring system. 4. The power demand monitoring system according to claim 3 , wherein data notification and transmission are enabled at the transmission date and time by setting data notification and transmission date and time in the data periodic transmission function. Demand monitoring system. 2. The power demand monitoring system according to claim 1 , wherein the demand graph display means is provided with a function of displaying a linear graph of predicted power consumption so that the predicted power can be easily grasped. 2. The power demand monitoring system according to claim 1 , wherein the demand graph display means has a scale changing function for automatically changing a scale attached to the power demand monitoring graph, and the information terminal device displays the display data of the power demand monitoring graph. A power demand monitoring system characterized in that all are displayed. 2. The power demand monitoring system according to claim 1 , wherein the demand graph display means has a power amount display function for each collection interval so that the information terminal device displays the power amount for each power amount data collection interval. A power demand monitoring system characterized by that.

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