JP2013017293A - Power saving information provision device, method, system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make accuracy of a reference power value used for displaying an extent of power saving achievement and the like be higher than that of a conventional one, by utilizing past data.SOLUTION: A power saving information provision device previously stores active power values of past days such as the same period in the previous year as a current period and status information such as meteorological information of the days; specifies a day corresponding to or similar to a target day when status information of the target day fits that of the day; and uses an active power value of the day as a reference power value of the target day. Thereby, data of the day whose status is similar to that of the target day can be utilized without forcing past power consumption value to be corrected by meteorological information of the same day in a different year as the target day. As a result, accuracy of a reference power value used for displaying an extent of power saving achievement and the like can be higher than that of a conventional one, by utilizing past data.

Description

  The present invention relates to a technology for supporting power saving.

  Unlike the tangibles such as gas and water, the power that has been consumed with the development of technology and society has the characteristic of being difficult to store. For this reason, when there is a limit to the amount of power supply due to the impact of a large-scale disaster, or particularly when the current power demand period is approaching in such a situation, a serious large-scale power outage due to a shortage of power will occur. Things can happen and the social losses caused by that are immeasurable.

  In order to avoid such a serious situation, it is indispensable to make efforts to save electricity not only in offices and factories, but also in each home. As a conventional technique related to power saving at home, a power consumption meter attached to a power outlet or plug is known. In addition, connect a measuring device of the same type to each household appliance to measure the amount of power of each device, and display the amount of electricity that should be saved and the amount of electricity that is set by the user. An apparatus has been proposed (for example, Patent Document 1).

JP 2009-47682 A JP 2008-259308 A

  By the way, the way of power saving in each home should be changed flexibly according to the power situation in the region and the whole society, and excessive or unnecessary power saving causes bad effects such as stagnation and inconvenience of society. However, the conventional technologies as described above are completed within individual households, and do not take into account the provision or reflection of information on the actual power situation, etc., nor are they intended to consider cooperation with other households. It was. For this reason, it has been impossible for each household to know the level of power saving that is truly necessary or to carry out such power saving according to the actual power situation in the region or society as a whole.

  In addition, the provision of information on electrical products that should be saved has not been according to the power situation of the community and society as a whole, so there is a problem of excessive power saving when there is enough power, and insufficient power saving when tight. There was also. In order to avoid this, it is of course difficult for the user to change the power saving amount frequently.

  Patent Document 2 is known as an example of a technique for displaying power saving achievement level to a user and supporting power saving. In this example, the power consumption value of the same period of the previous year collected and accumulated in advance from each household is corrected with the current weather information to obtain a reference value of the power situation in the case of not saving electricity, and the reference This is related to a power management device that displays the amount of power consumption such as months and weeks that can be reduced this year.

  In accordance with this, the reference value obtained by calculating in advance the power consumption value of the same period of the previous year with the current predicted temperature etc. in advance is the predicted value of the power situation, and calls for power saving in advance according to this predicted value It is also possible. In the present application, the power value obtained by calculation from past data or the like is referred to as “reference value” or “reference power value” in the present application.

  However, the relationship between weather information and power status is not simple and varies from year to year. For example, weather conditions such as the end of the rainy season and the time when it gets hot are not necessarily the same every year, and the influence of weather information such as temperature and weather on power use also varies depending on the day of the week and the conditions of the previous day. For this reason, it has been impossible to predict power with high accuracy by combining the power consumption values of the previous year with this year's weather information of different years.

  Furthermore, even today, electrical products are becoming more diversified and becoming daily necessities, and life surrounded by various types of electrical products is becoming more common. In this situation, it is practically difficult to make an appropriate judgment on the priority order of the electrical products to be saved unless specific guidance is provided according to the power situation. Of course, it is not practical to provide measuring instruments for all electrical products, including costs.

  In view of the above problems, an object of the present invention is to improve the accuracy of the reference power value used for displaying the degree of achievement of power saving, etc., by using past data.

  Another object of the present invention is to provide a specific guide for power saving according to the overall power situation, thereby realizing effective power saving through people's solidarity.

  Based on the above object, according to one aspect (1) of the present invention, a reference power value for a target day is calculated based on past data, and using the calculated reference power value for the terminal, transmission of display data for controlling display of the terminal is performed. A power saving information providing device for providing information on the past, a past data storage unit that stores, as past data, status information including at least weather information and actual power values for each past day, and a target date Target date status acquisition means for acquiring the status information, and the actual power value of the date of the status information that matches the acquired status information and the status information in the past data, and the target date based on the extracted date Determining means for determining the reference power value, and display transmitting means for transmitting display data for displaying information related to power saving based on the determined reference power value to the terminal. To.

  According to another aspect (10) of the present invention, the above aspect is captured by a method category, and the computer stores situation information including at least weather information for each past day and actual power values as past data. A past power storage unit that calculates a reference power value for a target date based on the past data, and uses the calculated power to provide information on power saving to the terminal by transmitting display data for controlling the display of the terminal It is an information providing method, the target day status acquisition process for acquiring the status information of the target date, and the power record date of the status information that matches the acquired status information with the status information in the past data A terminal that extracts display data for displaying information related to the power saving based on the determination process for extracting the value and determining the reference power value of the target date based on the extracted value, and the determined reference power value And executes a display transmitting process of transmitting.

According to another aspect (12) of the present invention, the above aspect is captured in the category of a computer program. By controlling the computer, status information including at least weather information for each past day and an actual power value are obtained. Implementing past data storage means storing past data, calculating a reference power value for the target date based on the past data, and using the calculated reference power value to the terminal by controlling the display of the terminal A power saving information providing program for providing information related to power saving, wherein the program causes the computer to acquire the status information on a target date and matches the acquired status information on the target date in the past data. Extract the actual power value on the day of the situation information and determine the reference power value on the target date based on it.
Display data for displaying information related to power saving based on the determined reference power value is transmitted to the terminal.

  As described above, in the present invention, the actual power value of the past day such as the same period of the previous year and the situation information such as the weather information of the day are stored in advance and correspond to or similar to the target day by matching with the situation information of the target day. The day is specified and the actual power value is used as the reference power value for the target day. Thereby, the past power consumption value is not forcibly corrected with the weather information of the target date that is different in year, and data having a date similar to the target date can be used. For this reason, the accuracy of the reference power value used for displaying the degree of achievement of power saving can be made higher than before by utilizing past data.

  According to another aspect (2) of the present invention, in any one of the above aspects, an acquisition unit that acquires a predetermined power status value or a saved power saving amount, the determined reference power value, and the acquired power Determination means for determining the degree of achievement of power saving based on a status value or the amount of power saving, and display transmission means for transmitting display data for displaying the determined degree of achievement of power saving to the terminal. It is characterized by that.

  In this way, the determined reference power value is assumed to have not been saved. As a reference value, the power status value such as the power usage rate obtained from the power company or the user's reporting operation from each terminal, etc. Based on the power saving amount transmitted and aggregated, the power saving achievement level is determined and displayed on the terminal. As a result, it is possible to realize a highly accurate power saving achievement level display by utilizing past data and making use of a reference power value that is more accurate than before, so that the user's willingness to save power can be more effectively aroused.

  In another aspect (3) of the present invention, in any one of the above aspects, the target day situation acquisition unit acquires time-series data in the past predetermined number of days until the target day as the situation information of the target day, The determination means uses the time-series data as the status information corresponding to the day of the past predetermined number of days starting from each day from the past day of the same date as the target day to the predetermined number of days before and after the past date. It collates and the said electric power performance value corresponding to the past day with high matching degree of collation is extracted, It is characterized by the above-mentioned.

  In this way, as the situation information used as a reference for collation, the time series data of the past predetermined number of days until the target date is collated with the situation information of the same past predetermined number of days until the past date close to the target date. Unexpected changes in actual power values resulting from the accumulation of conditions such as weather and social conditions can be reflected in the reference power value without understanding or elucidating the causal relationship. Further, the accuracy can be improved.

  According to another aspect (4) of the present invention, in any one of the above aspects, the status acquisition unit that acquires a predetermined power status value, the correspondence data that associates the power saving requirement and the power status value for each electrical product The necessity determination means for determining the power saving necessity for each electric product according to the acquired power status value, and an icon for each electric product in a different display mode according to the determined power saving necessity Display transmission means for transmitting display data for displaying the message to the terminal.

  According to another aspect (11) of the present invention, the above aspect is captured in a method category, and a computer provides information related to power saving to a terminal by transmitting display data for controlling display of the terminal. And, using the corresponding data in which the status acquisition process for acquiring a predetermined power status value and the power saving necessity level and the power status value for each electric product are associated with each other, the electric power corresponding to the acquired power status value is used. Necessity determination processing for determining the power saving necessity for each product, and display transmission for transmitting display data for displaying an icon for each electric product in a different display mode according to the determined power saving necessity to the terminal The processing is performed by a computer.

  According to another aspect (13) of the present invention, the above aspect is grasped in the category of a computer program. The power saving information for causing the computer to provide information related to power saving by transmitting display data for controlling the display of the terminal. The program is obtained by controlling the computer to obtain a predetermined power status value, and using the correspondence data in which the power saving necessity level and the power status value for each electrical product are associated with each other. Displaying the display data for displaying an icon for each electrical product in a different display mode in accordance with the determined power saving necessity according to the determined power saving necessity for each electrical product according to the power status value It is characterized by making it.

  A power saving information processing system according to another aspect (9) of the present invention captures the above aspect in the category of the system, and communicates from the power saving information providing apparatus according to any aspect of the present invention and the power saving information providing apparatus. And a terminal for acquiring and outputting information related to power saving by receiving display data via a network.

  As described above, in the above aspect, the power saving necessity level for each electrical product is prepared as data representing several levels according to the range of the power status value such as the power usage rate. Using it, as a specific guide to saving electricity according to the power situation of the region and society as a whole, provided as power usage status data from the power company, the icon of the electrical product displays the power saving necessity according to the power status value It displays concretely in a mode. Thereby, even if a user uses many kinds of electric products, the user can know the electric products that should be refrained from using, so that the user can easily execute power saving, and can realize effective power saving by people's solidarity.

  According to another aspect (5) of the present invention, in any one of the above aspects, a totaling unit that counts the total power saving amount based on the user power saving amount received from the terminal, the user power saving amount, and the total power saving amount totalized A power saving amount display means for transmitting display data to display the terminal to the terminal, and a predetermined reporting operation for reporting that power saving has been performed on the icon for each electric product displayed on the terminal In some cases, the apparatus includes a power saving amount reflecting means for transmitting display data for reflecting the power saving amount associated with the electric product to the user power saving amount to the terminal.

  As described above, in the above aspect, in addition to displaying the user power saving amount of the individual user and the total power saving amount of the entire user on the terminal, the power saving amount can be reduced by simply operating the icon of the saved electric product. It is reflected in the amount of power saved by the user, and by summing it up, it is also reflected in the amount of power saved by the entire user. As a result, it is possible to easily grasp the power saving amount of the user and obtain a response to the power saving effort in real time. In addition, the user can confirm how the power saving effort of the entire user is reflected in the huge amount of power saving. A feeling is fostered and effective power saving is realized.

  According to another aspect (6) of the present invention, in any one of the above aspects, the display transmission unit may display a red color as a signal color according to the power saving necessity, as a display form that differs depending on the power saving necessity. The display data is transmitted using a yellow color and a blue-green color, the maximum power saving necessity is represented by the red color, and the second power saving necessity is represented by the yellow color.

  As described above, the color corresponding to the degree of necessity of power saving among the combinations of colors according to the traffic signal is used for the icon of the electric product itself, the display background color or the frame surrounding, etc. Since the urgency can be transmitted intuitively and clearly, an excellent power saving effect can be realized.

  According to another aspect (7) of the present invention, in any one of the above aspects, the target for determining a target value of the amount of power to be reduced for at least one of the entire user and the individual user based on the acquired power status value. Display data for displaying a power saving target achievement status on the terminal based on the determining means, the determined target value, and at least one of the user power saving amount or the total power saving amount corresponding to the target value And achievement status display means for transmission.

  As described above, in the above aspect, as a specific guide for power saving according to the power status of the region and the whole society, the amount of power to be reduced is determined as the target value based on the power status value. In addition, the power saving target achievement status such as the target value achievement ratio of the individual user or the entire user is displayed on the terminal in relation to the user power saving amount. As a result, the amount of power to be reduced by the individual user or the entire user can be specifically grasped as the target value, and the degree of achievement thereof can be understood, so that effective power saving can be realized. In particular, if the target value and the power saving target achievement status are displayed for both the entire user and individual users, the user's willingness to save power can be effectively evoked from both the responsibility sharing of the individual user and the fostering a sense of solidarity as a whole user. And can realize effective power saving by solidarity of people.

  According to another aspect (8) of the present invention, in any one of the above aspects, the system further comprises a region identifying unit that identifies a region to which the terminal belongs, and the target determining unit includes the power amount to be reduced for each identified region. The target value is set.

  Thus, by setting the target value for each region according to different standards according to the temperature difference, etc., it is possible to realize detailed guidance and effective power saving promotion according to the local circumstances.

  Each of the above aspects can also be understood as other categories (methods, programs, systems, etc.) that are not specified. For the method and program categories, the “means” indicated in the device category is used as the “processing”. "Or" step ". In addition, the execution order of processes and steps is not limited to that specified directly in the present application, and can be changed by changing the process order, executing some processes all at once or partly at any time. Furthermore, in the category of methods and programs, computers such as servers and terminals that execute individual processes and steps may be common, or may differ from process to process or from timing to timing. In addition, the present invention includes more specific aspects described later.

  According to the present invention, the accuracy of the reference power value used for displaying the degree of achievement of power saving can be made higher than before by utilizing past data.

The functional block diagram which shows a structure about embodiment of this invention. The figure which shows the example of data in embodiment of this invention (past data). The flowchart (prediction precision) which shows the process sequence in embodiment of this invention. The figure which shows the example of a screen display in embodiment of this invention (power saving target, power saving achievement degree). The figure (corresponding data) which shows the example of data in the embodiment of the present invention. The figure which shows the example of data in embodiment of this invention (user power saving amount). The flowchart which shows the process sequence in embodiment of this invention. The figure which shows the example of a screen display in embodiment of this invention. The figure which shows the example of a screen display in embodiment of this invention (confirmation operation). The figure which shows the example of a screen display in embodiment of this invention (after operation). The figure which shows the example of a screen display in embodiment of this invention (all are green lights).

  Next, a mode for carrying out the present invention (referred to as “embodiment”) will be illustrated along the drawings. In addition, the assumptions common to the contents already described in the background art and problems are omitted as appropriate.

[1. Constitution〕
In the present embodiment, as shown in the configuration diagram of FIG. 1, a power saving information providing device 1 (hereinafter also referred to as “this device 1” or “this device”), a terminal T (user terminal T1 and operator terminal TX), The present invention relates to a power saving information processing system combined through a communication network N (for example, a mobile communication network such as a mobile phone, PHS, public wireless LAN, the Internet, etc.).

  Among these, this apparatus 1 calculates the reference power value of the target date based on the past data, and provides information related to power saving to the user terminal T by transmitting display data for controlling the display of the user terminal T using the calculated value. In the server system, the computer has at least an arithmetic control unit 6 such as a CPU, a storage device 7 such as a main memory and an auxiliary storage device, and a communication means 8 (communication circuit with a mobile communication network, Communication gateway device, wireless LAN adapter, etc.).

  The user terminal T is an information processing apparatus that acquires and outputs information related to power saving as a client system by receiving display data from the apparatus 1 via a communication network. Specifically, the user terminal T is a smartphone or a mobile phone terminal. Mobile information terminals such as tablet PCs, and other personal computers. In spite of the schematic FIG. 1, there are actually many user terminals T depending on the number of users. In addition to the configuration of the computer as described above, although not shown, a liquid crystal display panel, a touch panel, a keyboard, a mouse, and the like are input. It has an output unit and related elements such as a web browser.

  In the present apparatus 1, elements (10, 20, etc.) such as each unit shown in FIG. 1 are realized by a predetermined computer program stored (installed) in the storage device 7 controlling the arithmetic control unit 6. Among these elements, the information storage means can be realized in any data format such as a file on the storage device 7, or may be remote storage by network computing (cloud). The storage means may include not only a data storage area but also functions such as data input / output and management. In addition, the unit of the storage means shown in this application is for convenience of explanation, and the configuration can be divided or integrated as appropriate, and the processing data and processing results of each means are stored in addition to the explicit storage means. A storage means is used as appropriate.

  Of the storage means as described above, the past data storage means 85 stores, as past data, status information including at least weather information and actual power values (for example, power usage rate) for each past day. FIG. 2 shows a part of a simplified example. Here, the actual power value is an actual measurement value of power consumption for each hour. Further, the status information is attribute values and other information including, for example, at least weather information such as temperature, humidity, discomfort index, weather, precipitation, and air volume, whether it is a holiday, a tray or summer vacation time It may include social attributes such as whether or not, business indicators, economic indicators such as stocks, exchange rates, etc., information on the quantity and ratio of positive news and negative news, and the like.

  In addition, if the sensory temperature calculated by Misnar's theorem (Misnar's formula), Linke's theorem (Linke's formula), etc. is used as weather information, the actual power can be generated by using an air conditioner, such as the wind speed included in the sensory temperature. Since factors that affect consumption can be taken into account, the reference power value can be further improved in accuracy.

  In addition, as illustrated in FIG. 5, the correspondence data storage unit 25 is a unit that stores correspondence data in which a power saving necessity level and a power status value for each electric product are associated with each other. The types of “electric products” targeted by the present invention include household electric appliances (so-called household appliances), business, medical, welfare and other fields, and other medium-sized and large-sized businesses for railways and factories. Various electric machines are free. Also, it may be related to general attributes such as the type, type, type, type, etc. of the electric product, or may be an individual specific electric product set by the user according to the number of units owned from such type, etc. .

  For each specific electrical product, a means for accepting input of attributes such as actual power consumption and name from the user and setting it as data, and a means for reflecting that electrical product, data, and corresponding data are provided. Effective power saving support according to the number of electric products used by each user and individual differences can be realized. If the corresponding data and the storage means are transferred to the user terminal T together with web display data such as an HTML file and referred to for processing on the user terminal T, the load on the apparatus 1 and Communication traffic can be reduced.

  Further, as illustrated in FIG. 6, the power saving amount storage unit 45 sets at least the latest value for the user power saving amount transmitted from the user terminal T for each user who uses each terminal (identified by the user ID). It is a means to memorize. It should be noted that if the time series history of user power savings is accumulated, it can be used for arbitrary purposes such as graph display and analysis.

  In addition, the arrows in the figure (for example, FIG. 1) supplementarily indicate the main direction of the flow of data, control, etc., and do not deny other flows or imply a limitation on the direction. For example, when data is acquired in a certain direction, a prior data request and a subsequent acknowledge (ACK) are transmitted in the reverse direction. In addition, each means other than the storage means is a processing means for realizing and executing the functions and operations of information processing as described below, but these are functional units arranged for explanation, and actual hardware It doesn't matter if it matches elements or software modules.

[2. Effect on prediction accuracy)
In the present embodiment configured as described above, the processing procedure relating to the point where the accuracy of the reference power value used for displaying the degree of achievement of power saving is made higher than the prior art using past data is shown in FIG. This is shown in the flowchart.

[2-1. (Calculation of reference power value and provision of information)
First, the reference power value is calculated from the past data with the current day as the target day in the early morning. At this time, when the target day situation acquisition unit 82 acquires the target day situation information from the operator terminal TX or another appropriate server device serving as an information source (step S31), the determination unit 84 acquires the acquired target. The actual power value of the day (referred to as “equivalent day”) of the situation information that matches the situation information of the day and the past data is extracted (step S32), and the reference power value of the target day is determined based on the value. (Step S33).

  For example, when there is meteorological information such as the predicted maximum temperature of 32 degrees and the predicted average humidity of 76% as the situation information on the target day, it matches in the past days illustrated in FIG. 2 (indicated by a dashed ellipse in FIG. 2). The equivalent day is Monday, June 28, 20X0, and the actual power value as the power consumption on that day is 51 million kW. Here, a specific standard on how to determine the reference power value from the extracted actual power value is free. For example, if the extracted single actual power value is used as the reference power value as it is, the processing becomes simple and quick.

  In addition, if the actual power value extracted is a reference power value that is a value corrected by a predetermined information item in the status information of the target day, a more accurate reference can be made according to the specific application and policy. The power value can be obtained. Furthermore, if the average value calculated from the actual power values of multiple equivalent days is used as the reference power value, if there are multiple equivalent days with high degree of coincidence of status information, only one of them will be forcibly selected. Even if it is not, it is possible to utilize all or a part of a plurality of equivalent days in the form of the average value, and to prevent the accuracy from being lost.

  Then, the display transmission unit 30 responds to a request for data or a page from a web browser or a terminal application (application program such as a smartphone) (step S36), and information related to power saving based on the determined reference power value (hereinafter, referred to as “power saving”). Display data for displaying “power saving information” is transmitted to the user terminal T (step S37). An example of a web page displaying such power saving information is shown in FIG.

  Although the specific content of the power saving information is arbitrary, for example, in this embodiment, the power saving target value based on the reference power value or the category of the degree of power saving (for example, “power saving with top priority”, “normal power saving”, “wasted” By sending display data (step S35) for displaying a power saving target as power saving information (step S35) to the user terminal T (step S37). Can promote no power saving efforts. The display D22 of the power saving target in the display example of FIG. 4 includes the display D221 of “power saving level: highest priority” as the category of the degree of power saving as described above, and at the same time, “target power saving target value” as a specific power saving target value. The display D222 of “rate: reference power value ratio 15% (−645 million kW)” is also included.

  Further, if display data for displaying the degree of achievement of power saving (also referred to as “power saving achievement degree”) as power saving information is transmitted to the user terminal T (described later, display D33 in FIG. 4), power saving is achieved. Since the user can confirm the degree of fruiting of the effort and get a response, further power saving efforts can be promoted thereafter.

  As described above, in the present embodiment, the actual power value of the past day such as the same period of the previous year and the situation information such as the weather information of the day are stored in advance and correspond to or similar to the target day by matching with the situation information of the target day. The actual power value is used as the reference power value for the target date (today). Thereby, the past power consumption value is not forcibly corrected with the weather information of the target date that is different in year, and data having a date similar to the target date can be used. For this reason, the accuracy of the reference power value used for displaying the degree of achievement of power saving can be made higher than before by utilizing past data.

[2-2. Achievement level display based on reference power value)
In the present embodiment, the power saving achievement level is transmitted to the user terminal T as the power saving information. Specifically, for example, after a predetermined time (step S38), when the acquisition unit (here, referred to as the status acquisition unit 10) acquires a predetermined power status value or a saved power saving amount (step S39), the determination unit 86. However, the power saving achievement level is determined based on the determined reference power value (for example, power usage rate and power consumption) and the acquired power status value (for example, power usage rate and power consumption) or power saving amount. (Step S40) The display transmission means 30 includes the determined power saving achievement level in the display data (Step S41), and transmits display data for displaying the power saving achievement level to the user terminal T (Step S37). .

  Here, in determining the degree of achievement of power saving, a power status value such as a power usage rate can be used, and a power saving amount can also be used. If the former power status value is acquired from an electric power company or the like by appropriate data transfer or input reception, the processing load can be reduced. In addition, if the power status value is obtained by subtracting the power status value as described above from the reference power value, the calculation load is small. On the other hand, as will be described later, it is transmitted from each terminal by a user reporting operation or the like. The amount of saved user power may be totaled.

  Moreover, the concrete expression form of power saving achievement degree is also free. For example, if the actual power status value is reduced with respect to the reference power value and the specific reduction amount or reduction rate is displayed as the power saving achievement level, the situation such as the increase / decrease of the reduction rate can be specified. Can understand and emphasize the importance of a small amount of effort. In addition, as a degree of achievement of power saving, applicable categories of reduction rate (for example, ranks such as “A”, “B”, “C”, “excellent”, “good”, “possible”, “15% or more”, “less than 15%, 10% If you want to display "more than" or "less than 10%", etc.), you can intuitively communicate the overall situation and achievements without any details, so even busy people or people who are not interested in details A wide range of energy-saving efforts can be promoted.

  For example, the power saving achievement level display D33 in the display example of FIG. 4 includes the specific reduction rate and reduction amount display D331 (“... 17% (−73110,000 kW). A display D332 decorated with “A” is included as a corresponding category. Of course, as appropriate categories of reduction rates, appropriate sentences such as “I was able to do well”, “I did well” and “Let's do my best” as used in elementary and secondary education, etc., with flowers as motifs Arbitrary expression formats can be freely adopted, such as combining with the designed designs.

  As described above, in this embodiment, the determined reference power value is assumed to have not been saved. As a reference value, a power status value such as a power usage rate obtained from an electric power company, or a user from each terminal The power saving achievement level is determined based on the power saving amount transmitted and collected by the reporting operation and displayed on the terminal. As a result, it is possible to realize a highly accurate power saving achievement level display by utilizing past data and making use of a reference power value that is more accurate than before, so that the user's willingness to save power can be more effectively aroused.

[2-3. (Time-series data collation)
Further, when determining the equivalent date from the situation information in determining the reference power value, determination of time series data over a plurality of days may be used. In this case, the target day situation acquisition unit 82 acquires time-series data in the past predetermined number of days up to the target day as the target day status information, and the determination unit includes a past date of the same date as the target day in the past data. The status information corresponding to the date of the past predetermined number of days starting from each day before and after the predetermined number of days is collated with the time-series data, and the actual power value corresponding to the past day having a high degree of matching is extracted. . For example, even in two weekends where there is no great difference in status information, it can be assumed that the actual power value differs depending on whether or not the heat wave continued for 5 days on the previous weekday. In addition, even on two identical Fridays that are not significantly different from the situation information on the day, it can be assumed that the previous day is different in the actual power value between fine weather and stormy weather.

  In this way, as the situation information used as a reference for collation, the time series data of the past predetermined number of days until the target date is collated with the situation information of the same past predetermined number of days until the past date close to the target date. Unexpected changes in actual power values resulting from the accumulation of conditions such as weather and social conditions can be reflected in the reference power value without understanding or elucidating the causal relationship. Further, the accuracy can be improved.

[3. (Effects of concrete guidance)
Further, the present invention can be realized only by the elements related to the above-described functions and effects, but more effective power saving can be realized by using the following functions and effects together. That is, in the present embodiment, a flowchart of FIG. 7 shows a processing procedure relating to the point of providing a specific guide for power saving according to the overall power situation and realizing effective power saving by people's solidarity.

[3-1. Overview of action and effect)
In the flowchart, when a portion related to the basic operation and effect of the present embodiment is extracted, first, the status acquisition unit 10 acquires a predetermined power status value (for example, power usage rate) (step S12). Further, the necessity determination unit 20 uses the correspondence data stored in the correspondence data storage unit 25 to determine the power saving necessity for each electric product according to the acquired power status value (step S14).

  And the display transmission means 30 transmits the display data for displaying the icon for every electric product with the display mode which changes with the determined power-saving necessity to the user terminal T (step S16). In the user terminal T, if display data is transmitted from the server, it is received and the display is updated (step S21). The display example of the web page shown in FIG. 8 includes a display D4 of icons i (i1 to i6) for each electric product together with the current estimated power usage rate (display D1). It will be called an “electrical appliance icon”. The “icon” is an object displayed as a picture.

As described above, in the present embodiment, the power saving necessity level for each electrical product is prepared as data representing several levels according to the range of the power status value such as the power usage rate (FIG. 5). Using this, as a specific guide for power saving according to the power status of the region and society as a whole provided as power usage status data from the power company, the power saving necessity according to the power status value is set (step S14) By specifically changing the icon display mode of the product according to the power saving necessity (described later), it is specifically displayed (FIG. 8). Thereby, even if a user uses many kinds of electric appliances, the user can know an electric product to be refrained from using, so that the user can easily execute power saving, and can realize effective power saving by people's solidarity.
More specific description will be given below.

[3-2. (Acquire power status value)
First, the acquisition of the power status value (step S12) is performed at a predetermined acquisition timing such as every hour (step S11: “YES”). The power status value acquired at that time is not limited to the power usage rate, but the content and format, such as the amount of power supplied, the amount of power used, temperature, humidity, etc., can be freely received. If it is acquired by accepting reception or input from the outside, for example, the load on the apparatus can be reduced. On the other hand, if the power status value is obtained by calculating as a predicted value or predicted value from the past actual value, current or forecast temperature, etc., the power saving necessity can be determined with high accuracy, and the power status value Fault tolerance can be improved by avoiding external dependence on acquisition.

[3-3. (Determining the level of power saving)
In addition, the specific content of the correspondence data used for the necessity determination means 20 to determine the degree of power saving required for each electrical product according to the acquired power status value (step S14) is free, and power saving is required for each electrical product. The degree and the power status value are not limited to the direct association.

  For example, the correspondence data example of FIG. 5 shows the power consumption per unit time (for example, W: watts), the usage time per minute (minutes), and the average power consumption per hour for each electrical product. (Wh) is associated with electric power priorities such as the degree of diffusion and necessity of use, and the power condition value reference values corresponding to red, yellow, and blue signals (described later), which are power saving necessity levels. Is. In this case, the reference value of the power status value corresponding to the power saving necessity may not be directly connected to the power saving necessity alone.

  Specifically, it is possible to determine the power saving necessity by combining multiple elements included in the corresponding data, such as by appropriately combining the power status value reference value corresponding to the power saving necessity with the electrical priority and other information items. In this way, it is possible to make a more flexible determination in accordance with the actual situation. An example of this is that the level of power saving that leads to the display of information prompting the suspension of use, such as red and yellow signals, is determined from the red signal standard so that the order of electrical products with the highest power consumption is the order of electrical products with the highest power consumption per hour. At the same time as determining each reference value up to the green signal reference, a specific signal color is determined using the electrical appliance priority.

  For example, if there is a difference in electrical priority between two types of electrical products that have the same power consumption per hour (e.g. "1" and "3"), the electrical priority is high. (E.g., “1”), the power saving necessity is evaluated one step lower (for example, originally red signal → yellow signal, originally yellow signal → blue signal, etc.), or those with lower electrical priority (eg “3”) (E.g., yellow signal → red signal, originally blue signal → yellow signal, etc.) can be considered. Even when not using the stage evaluation as described above, for example, even when applying a red signal or a yellow signal in order of high power consumption per hour between a plurality of electrical products according to the power status value It is conceivable to make adjustments such as changing the order of summaries according to the priority of the electric appliances.

  In this way, by using together the numerical standard that temporarily associates the power status value and the power saving necessity with other standards exemplified as the electrical appliance priority, the degree of spread of each electrical product and the necessity of use, etc. This makes it possible to promote reasonable power saving that matches the actual situation in the home.

[3-4. (Display icon)
The display transmission means 30 that uses the electric appliance icon i having a different display mode depending on the power saving necessity determined as described above can be realized as a display data generation module (that is, web display data such as an HTML file). In addition, as a display mode of the electric appliance icon i that varies depending on the power saving necessity, for example, the higher the power saving necessity, the higher the density, the darker the color, and the larger the size, or the higher the necessity degree is emphasized by blinking. Although it is free to display things with a small degree of necessity in grayout or transparent, it is desirable to display them in a color according to the degree of power saving.

  In this case, the display transmission unit 30 uses red, yellow, and blue-green colors as signal colors according to the power saving necessity as display modes that differ depending on the power saving necessity, and has the greatest power saving necessity. Is displayed with a red color (red signal), and display data is transmitted with the yellow color (yellow signal) indicating the power saving necessity next to the maximum. Similarly, in this display data, the electric appliance icon having the least necessity for power saving is represented by blue-green (green signal, that is, blue signal), and these colors are used for the electric appliance icon itself, the display background color, or the frame.

  In this case, it is considered that red appliances should be refrained from use in principle, and it is desirable to refrain from using yellow unless it is urgent. About blue (green), in addition to the electric product which should be used paying attention to wasteful power consumption, it represents the electric appliance which has been operated as described later to save power. In the display example of FIG. 8, corresponding to each of the above colors, red is represented by a double rectangle using dark gradation (electric appliance icon i1 for an air conditioner and electric appliance icon i5 for a microwave oven), and yellow is next. It is represented by a rectangle with dark gradation (electric appliance icon i2 for TV, electric appliance icon i3 for lighting equipment, and electric appliance icon i6 for rice cooker), and blue is represented by a circle without gradation (electric appliance icon i4 representing the drying operation of the washing machine) ).

  As described above, depending on the display mode used for the electrical icon, the display background color, or the frame enclosure, the color corresponding to the degree of necessity for power saving among the combinations of colors according to traffic signals (FIG. 8) Since the urgency of power saving can be transmitted intuitively and clearly, an excellent power saving effect can be realized.

[3-5. (Power saving update display according to operation)
In the present embodiment, a predetermined operation on the electric appliance icon i displayed as described above is called an individual user power saving amount (referred to as “user power saving amount”) or an entire user power saving amount (referred to as “total power saving amount”). ) Can save power.

  Specifically, the power saving amount receiving means 80 accumulates and stores the user power saving amount received from the user terminal T in the power saving amount storage means 45 (step S17). At the timing (step S18), the total power saving amount is totaled (step S19). The process proceeds to step S11, and even if it is not the timing of acquiring the power status value (step S11), if the transmission content is updated, for example, when the total power saving amount has changed when step S15 is reached (step S15: “YES”) The power saving amount display means 51 transmits display data for displaying the user power saving amount and the total power saving amount to the terminal (step S16). The power saving amount display means 51 may be integrated with the display transmission means 30.

  In the display example of FIG. 8, as the display D3 based on the display data as described above, the user power saving amount is displayed as “Your power saving achievement”, and the overall power saving amount is displayed as “Everybody power saving achievement”. The user power saving amount as described above can be reported from the user terminal T as follows. Specifically, the display data transmitted to the user terminal T by the power saving amount reflecting means 52 (which may be integrated with the power saving amount display means 51 and the display transmitting means 30) is a script description or a rich Internet application (RIA). The display data implements the following processing in addition to the display illustrated in FIG.

  That is, the display data is displayed when a predetermined reporting operation for reporting that power saving has been performed is performed on the icons i (i1 to i6) for each electrical product displayed on the user terminal T (step S22). First, the power saving amount associated with the electrical product (for example, “650 W for“ air conditioner ”in FIG. 5) is reflected in the user power saving amount (“ achievement of your power saving ”on display D3 in FIG. 8) (step S23). In that case, the display data further updates the display of the operated icon and the reflected user power saving amount as illustrated in FIG. 10 (step S24). In addition, the reflected user power saving amount is displayed in the apparatus 1 as shown in FIG. (Step S25).

  For example, as a result of the reporting operation performed on the electric appliance icon i1 of the air conditioner shown in FIG. 8 as shown in FIG. 9, the display state of the electric appliance icon i1 in the state shown in FIG. Further, the user power saving amount (“your power saving achievement”) also changes from “1.00 kW” in FIG. 8 to “1.54 kW” in FIG. FIG. 11 illustrates a state in which all of the displayed electrical products have turned green as a result of repeating the power saving reporting operation and the display updating based on the power saving reporting operation.

  Here, the details of the reporting operation for the icon i and the details of the screen change related to the icon i are free. For example, in the screen state of FIG. 8, for the icon i corresponding to the electric product that the user has saved power by turning off the power or the like. It is also possible to immediately execute a series of processes (steps S23 to S25) such as reflecting the power saving amount by simply performing an operation such as tapping the touch panel or clicking a mouse, and transit to the screen state of FIG.

  On the other hand, as another example, upon receiving an operation such as tapping, mouse over, or clicking on the icon i in FIG. 8, the detailed information display is temporarily performed as illustrated in FIG. 9 (corresponding to a part of FIG. 8). The confirmation operation area R that is also used may be displayed. If a predetermined operation (for example, operation of the “power-saving” button B) is performed in this region R, the process proceeds to a series of processes (steps S23 to S25) such as reflection of the power saving amount. By providing information only when necessary, it is possible to effectively utilize the limited screen size and prevent erroneous operations.

  As described above, in this embodiment, in addition to displaying the user's power saving amount of the individual user and the overall power saving amount of the entire user (display D3 in FIG. 8), only the icon of the saved electric product is operated. (Step S22: “YES”), the power saving amount is reflected in the user power saving amount of the individual user (Step S23), and the total power saving amount is also reflected in the total power saving achievement amount of the user (Step S19). As a result, it is possible to easily grasp the power saving amount of the user and obtain a response to the power saving effort in real time. In addition, the user can confirm how the power saving effort of the entire user is reflected in the huge amount of power saving. A feeling is fostered and effective power saving is realized.

[3-6. (Target value setting and achievement status display)
Further, in the present embodiment, it is possible to encourage energy saving efforts by displaying the power saving target value and its achievement status. Specifically, the target determining means 60 determines a target value of the amount of power to be reduced for at least one of the entire user and the individual user based on the acquired power status value (step S12), (step S13), The achievement status display means 61 displays the power saving target achievement status based on the determined target value and at least one of the user power saving amount and the total power saving amount corresponding to the target value (display D3 in FIG. 8). Is transmitted to the user terminal T (step S16). The achievement status display unit 61 may be configured integrally with the display transmission unit 30.

  For example, if the current estimated power usage rate exceeds 80%, the amount exceeding 80% is set as the reduction target. Specifically, if the current power usage rate is 87% and the supplied power is 43 million k, 4300 × 0.07 = 3.08 million kW corresponding to 7% is the target value of the amount of power to be deleted for the entire user. Become. In the display D2 of the screen example shown in FIG. 8, this target value of 3.08 million kW is displayed as “Everyone's power saving target 3,080,000 kW” and divided by the number of households in this area (for example, 20 million households). The target value (for example, 1.54 kW) of the individual user calculated by, for example, is also displayed as “Your power saving target 1.54 kW”.

  In addition, in the display D3 of the screen example shown in FIG. 8, as the power saving target achievement status based on the target value (display D2 in FIG. 8), “Your power saving achieved 1.00 kW (65% of the target)” "Power saving achieved 2,317,511 kW (75% of target)".

  Regarding usage and supply capacity, when data on supply capacity and usage is received from a local power company for one hour before, the usage rate for one hour before can be calculated by dividing the usage by the supply capacity. . In addition, future usage such as after a few hours can be estimated based on statistical data such as past time series data, weather information, etc., so the power usage rate can be estimated by estimating the usage rate after several hours. Can be obtained and used to determine the target value. As a result, power saving can be promoted in advance for several hours before peak hours such as in the afternoon in summer, and adverse effects such as sudden large-scale power outages can be effectively prevented.

  In particular, the reference power value of the day determined by the determining means 84 is acquired as the power status value (step S12), and based on the reference power value, the amount of power to be reduced for at least one of the entire user and individual users. The target value is determined (step S13), and the achievement status display means 61 determines the power saving target achievement status based on the determined target value and at least one of the user power saving amount and the total power saving amount corresponding to the target value. If the display is performed (display D3 in FIG. 8), more appropriate and effective power saving can be realized by utilizing the reference power value that has been made more accurate than before by utilizing past data.

  As described above, in the present embodiment, as a specific guide for power saving in accordance with the power status of the region or society as a whole, the amount of power to be reduced is determined as a target value based on the power status value (step S13). In addition, a power saving target achievement status (for example, display D3 in FIG. 8) such as a target value achievement ratio for individual users or the entire user is displayed on the terminal in relation to the user power saving amount (step S16). As a result, the amount of power to be reduced by the individual user or the entire user can be specifically grasped as the target value, and the degree of achievement thereof can be understood, so that effective power saving can be realized.

  In particular, in the present embodiment, by displaying the target value (for example, the display D2 in FIG. 8) and the power saving target achievement status (for example, the display D3 in FIG. 8) for both the entire user and the individual users, the responsibility sharing of the individual users is performed. It is possible to effectively stimulate the user's willingness to save power from both sides of fostering a sense of solidarity as a whole user, and it is possible to realize effective power saving by people's solidarity

[3-7. (Target value setting by region)
Moreover, the target value as described above can be set for each region. That is, the apparatus 1 includes a region identification unit 70 that identifies a region to which the user terminal T belongs, and the target determination unit 60 sets a target value of the amount of power to be reduced for each region identified by the region identification unit 70. can do. Note that the “belonging” area of the user terminal T is an area associated with the user terminal T in some sense, and is typically an area where the user terminal T is located (existing) or an area where the user terminal T is located. be able to.

  For example, if the area where the user terminal T is located or estimated to be located is acquired from the history data of the area previously identified for the user terminal T and used, the terminal may be temporarily unable to receive GPS radio waves or Corresponding to the case where the current location of the user terminal T cannot be obtained from the name or location information of the network device because it is via an access line due to roaming or the like of a different provider from the user, the user terminal T The region to which it belongs can be identified.

  Then, for example, weighting is performed for each region based on weather information such as temperature and humidity, and a target value is allocated in proportion to the weight. For the area to which the terminal belongs, the mobile terminal such as a smartphone acquires and transmits the IP address for each access source terminal, the name of the equipment in the Internet service provider or Internet exchange that is the communication path, etc. Identification is based on the positional information that comes.

As an example, let us consider a case where a certain city in a jurisdiction area of a certain electric power company has a high possibility that the use of an air conditioner is more humid than other areas. Specifically, if the power usage rate at a certain point in time is 75% and the average discomfort index 80 in the city with respect to the average discomfort index 70 in the power company's jurisdiction, the assumption is that the power usage rate is proportional to the average discomfort index. , The power usage rate of the city is

75% × (80/70) ≒ 86%

Can be estimated. In this case, if the power supply corresponding to the city is 220,000 kW, and the excess target exceeds 6%, the target is 6%.

220,000 kW x excess 6% = 13200 kW

It becomes.

  As described above, in this embodiment, by setting a target value for each region based on different standards according to differences in temperature, etc., more power-saving target values can be obtained in regions where the temperature and humidity are high and the use of air conditioners is expected to increase. It is possible to realize detailed guidance and effective power saving promotion according to the local circumstances, such as allocating a large amount of electricity and expecting a large power saving effect.

  Further, means for aggregating the power saving amount for each region to which the terminal identified by the region identification means 70 is based on the user power saving amount received from the terminal, the state of achievement of the power saving target in the region, the line marking of the power saving amount, and the like By providing the means for displaying the power saving amount, the power saving amount can be tabulated and displayed for each region, and the power saving can be promoted more effectively due to the sense of opposition between the regions.

[4. Other embodiments]
In addition, the said embodiment is only an illustration and this invention includes what is illustrated below and other embodiment other than that. For example, the configuration diagrams, data diagrams, flowcharts, and the like in the present application are merely examples, and the presence / absence of each element, the order of the arrangement and processing execution, and the specific contents can be changed as appropriate. As an example, setting of target values for power saving, aggregation of power savings, power saving achievement status (power saving goal achievement status if target value exists), etc. are not limited to each region, but gender (by gender), 20 It may be performed for so-called demographic information items typified by age such as generations and 30s, and other arbitrary attributes.

  Moreover, the numerical value used as a combination or combination in determining the power saving necessity level is not limited to the power consumption (Wh) per hour. For example, if the power consumption (W) is used, a power saving necessity in accordance with a substantial influence on the entire power consumption can be obtained. Furthermore, while the power saving necessity is determined by the power consumption per hour (Wh), if the power consumption (W) is used for the power saving amount reflected in the user power saving amount, the user can use an intuitively easy-to-understand number called the power saving amount. Can stimulate the power saving will.

  In addition, a configuration in which individual units constituting the device 1 are further realized by independent devices is also common. Similarly, the configuration of the present invention is flexible, such as by realizing each means shown in the above embodiment by calling an external platform or the like with an API (application program interface) or network computing (so-called cloud). Can change. Furthermore, each element such as means relating to the present invention may be realized by other information processing mechanisms such as a physical electronic circuit as well as a computer control unit.

1 Power-saving information provision device (this device)
6 Arithmetic Control Unit 7 Storage Device 8 Communication Unit 10 Status Acquisition Unit 20 Necessity Determining Unit 25 Corresponding Data Storage Unit 30 Display Transmission Unit 40 Totaling Unit 45 Power Saving Amount Storage Unit 51 Power Saving Amount Display Unit 52 Power Saving Amount Reflection Unit 60 Target Determination Unit 61 Achievement status display means 70 Area identification means 80 Power saving amount reception means 82 Target date status acquisition means 84 Determination means 85 Past data storage means 86 Determination means B Buttons D1 to D4 Display N Communication network R Confirmation operation area T Terminal

Claims (13)

A power saving information providing apparatus that calculates information on the target date based on past data and uses it to provide information on power saving to the terminal by transmitting display data for controlling the display of the terminal,
Past data storage means for storing, as past data, status information including at least weather information and actual power values for each past day;
A target date status acquisition means for acquiring the status information of the target date;
A determination means for extracting the actual power value of the date of the status information that matches the acquired status information of the target date and the past data, and determining the reference power value of the target date based thereon;
Display transmission means for transmitting display data for displaying information on the power saving based on the determined reference power value to the terminal;
A power saving information providing device comprising: An acquisition means for acquiring a predetermined power status value or a power saving amount;
Determination means for determining the degree of achievement of power saving based on the determined reference power value and the acquired power status value or the power saving amount;
Display transmission means for transmitting display data for displaying the determined degree of achievement of power saving to the terminal;
The power saving information providing apparatus according to claim 1, further comprising: The target day status acquisition means acquires time series data in the past predetermined number of days until the target date as the status information of the target date,
The determination means uses the time-series data as the status information corresponding to the day of the past predetermined number of days starting from each day from the past day of the same date as the target day to the predetermined number of days before and after the past date. The power saving information providing apparatus according to claim 1, wherein the actual power value corresponding to a past day having a high collation matching degree is extracted. Status acquisition means for acquiring a predetermined power status value;
Using the correspondence data in which the power saving necessity for each electrical product and the power status value are associated with each other, the necessity determination means for determining the power saving necessity for each electrical product according to the acquired power status value;
Display transmission means for transmitting to the terminal display data for displaying an icon for each electrical product in a different display mode according to the determined degree of power saving;
The power saving information providing device according to any one of claims 1 to 3, further comprising: Aggregating means for totalizing power savings based on user power savings received from the terminal;
A power saving amount display means for transmitting display data for displaying the user power saving amount and the aggregated total power saving amount to the terminal;
When a predetermined reporting operation for reporting that power saving has been performed on the icon for each electrical product displayed on the terminal is performed, the power saving amount associated with the electrical product is represented by the user power saving amount. Power saving amount reflecting means for transmitting display data to be reflected to the terminal,
The power saving information providing device according to claim 4, further comprising:   The display transmission means uses a red color, a yellow color, and a bluish green color as signal colors according to the power saving necessity as a display mode different depending on the power saving necessity, and maximizes the power saving necessity. 6. The power saving information providing apparatus according to claim 4 or 5, wherein the display data is transmitted with a red color, and the display data representing the power saving necessity next to the maximum with the yellow color. Target determining means for determining a target value of the amount of power to be reduced for at least one of the entire user and the individual user based on the acquired power status value;
Achievement status of transmitting display data for displaying a power saving goal achievement status to the terminal based on the determined target value and at least one of the user power saving amount or the overall power saving amount corresponding to the target value Display means;
The power saving information providing apparatus according to claim 5 or 6, further comprising: A region identification means for identifying the region to which the terminal belongs,
The power saving information providing apparatus according to claim 7, wherein the target determining unit sets a target value of the amount of power to be reduced for each identified area. The power saving information providing device according to any one of claims 1 to 8,
A terminal for acquiring and outputting information related to power saving by receiving display data from the power saving information providing apparatus via a communication network;
A power saving information processing system characterized by comprising: The computer has past data storage means for storing, as past data, status information including at least weather information for each past day and actual power values, and calculates a reference power value for the target date based on the past data A power saving information providing method for providing information on power saving to the terminal by transmitting display data for controlling the display of the terminal using the display data,
A target day status acquisition process for acquiring the status information of the target date;
A determination process of extracting the actual power value of the date of the status information that matches the status information acquired in the past data with the status information of the target date, and determining the reference power value of the target date based thereon;
Display transmission processing for transmitting to the terminal display data for displaying information related to the power saving based on the determined reference power value;
The power saving information providing method characterized by performing. A status acquisition process for acquiring a predetermined power status value;
A necessity determination process for determining the power saving necessity for each electrical product according to the acquired power status value, using correspondence data that associates the power saving necessity level and the power status value for each electrical product;
Display transmission processing for transmitting to the terminal display data for displaying an icon for each electrical product in a different display mode according to the determined degree of power saving;
11. The power saving information providing method according to claim 10, wherein the computer further executes. By controlling the computer, it is possible to realize past data storage means for storing, as past data, status information including at least weather information for each past day and actual power values, and based on the past data, A power-saving information providing program for calculating information on a reference power and using the data to transmit information about power-saving to the terminal by transmitting display data for controlling display of the terminal,
The program is stored in the computer,
Get the status information on the target day,
Extracting the actual power value of the date of the status information that matches the status information and the status information of the acquired target date, and determining the reference power value of the target date based on it,
A program for saving power information, characterized by causing the terminal to transmit display data for displaying information related to the power saving based on the determined reference power value. By controlling the computer further
Get a predetermined power status value,
Using the correspondence data in which the power saving necessity for each electrical product is associated with the power status value, the power saving necessity for each electrical product according to the acquired power status value is determined,
A power-saving information providing program that causes the terminal to transmit display data for displaying an icon for each electric product in a different display mode according to the determined power-saving necessity.

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