KR101762626B1 - Apparatus and method for calculating electric power charge in power automation system - Google Patents

Abstract

An electric power charge calculation apparatus of the present invention includes: a metering unit for acquiring a power usage amount of each load included in a group when an electricity charge is imposed on a group basis including a plurality of loads based on a predetermined electricity rate; and a calculating unit for calculating an electricity rate for each load using the charge rate and the amount of electric power used for each load.

Description

[0001] APPARATUS AND METHOD FOR CALCULATING ELECTRIC POWER CHARGE IN POWER AUTOMATION SYSTEM [0002]

The present invention relates to a power bill calculating apparatus and method for calculating an electricity bill for each load by using a power consumption amount for each load.

Currently, energy use is increasing exponentially and becoming a problem for society as a whole.

The existing power meter integrates the pulse value from water, electricity, gas meter, etc. and displays only the final value. The display means is usually a mechanical counter attached to a meter or an electronic counter installed at another place apart from the counter or a method of reading an accumulated value (accumulated value) through a remote transmission / reception of a wire as described above. In this case, the flow rate of the meter is read as a pulse value, the pulse value is continuously accumulated in the central processing unit and displayed, or the data value is transferred to the remote terminal as it is with the display and stored. Therefore, the electricity bill is imposed on the same day every month with the meter reading minus the previous month accumulated value.

Therefore, it is difficult to convert electric power consumption into usage fees at a company, a factory, and a home, or to calculate electric charges by load. In particular, it is practically impossible for a user to establish a power usage plan for each load or to manage power usage for each load when the charging fee of the applicable charging plan changes over time.

Korean Patent Registration No. 1301871 discloses a technique for converting cumulative power consumption into electricity charges, but there is no plan for establishing a power usage plan for each load.

Korean Patent Registration No. 1301871

The present invention is intended to provide an apparatus and method for calculating a power bill capable of managing an electricity bill and a power billing amount for each load.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

The power bill calculation apparatus of the present invention includes: a metering unit for acquiring a power consumption amount of each load included in the group when an electricity bill is imposed on a group basis including a plurality of loads based on a predetermined charging plan; And a calculator for calculating an electricity rate for each load using the charge rate and the amount of electric power used for each load.

The present invention may include a metering unit for obtaining the amount of power used for each load, and a calculating unit for calculating the electricity rate for each load using the charge amount and the amount of power used for each load.

According to the weighing unit and the calculating unit, the user can confirm the amount of electric power and electric charge to be used for each load. Therefore, the user can establish the power use plan such as turning off the load with low importance.

In particular, the calculating unit of the present invention can accurately calculate and calculate the electric charges for each load because the charging fee included in the charging plan changes instantaneously, and the charging rate is differently applied in the minimum time unit in which the charging rate is variable.

1 is a block diagram showing a power bill calculating apparatus according to the present invention.
Fig. 2 is a schematic view showing the operation of the calculation unit. Fig.
3 is a schematic diagram showing an interface screen generated by the calculation unit.
4 is a schematic view showing a part of the first menu.
5 is a schematic diagram showing a creation menu.
6 is a schematic diagram showing a holiday input menu.
7 is a schematic diagram showing a peak day input menu.
8 is a flowchart illustrating a method of calculating a power charge of the present invention.
9 is a graph showing power consumption per hour.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

1 is a block diagram showing a power bill calculating apparatus according to the present invention.

Electricity charges or electricity charges may be imposed on users by electric suppliers such as KEPCO, which supplies electricity. At this time, the user may include a group such as a home, a factory, a company, etc. provided with a plurality of electric devices consuming electricity (hereinafter referred to as "load").

Electricity suppliers can set up a tariff as the basis for charging electricity. The electricity supplier can determine the electricity usage in groups with a plurality of loads, and then charge the electric charges on a group basis by applying the corresponding charge.

In this case, the billing information provided from the electricity supplier may include only the electric power used in the group for a specific period and the electric fee corresponding to the electric power consumption. Thus, the manager of the group charged with the electricity bill has no way of using what power from the load and checking the electricity rate per load imposed on the load. As a result, it is difficult for the group's manager to reduce the use of less important specific loads in order to save electric bills, or to replace the heavy-load loads with energy-saving devices.

In order to calculate the amount of electric power used for each load or the electric rate for each load, the electric power rate calculation apparatus of the present invention may include a metering unit 110 and a calculation unit 130.

When electricity charges are charged in units of groups including a plurality of loads based on a predetermined charging plan, the metering unit 110 can acquire the power usage amount of each load included in the group.

The metering unit 110 may include a sensor installed in each load or a sensor installed in a commercial line connecting each load with a commercial power source to obtain a power consumption per each load. Or the metering unit 110 can receive the power usage of each load from each sensor.

The calculating unit 130 can calculate the electric charge for each load by using the charge amount that is a criterion for charging electric charges and the electric power consumption per load. The calculating unit 130 may receive the charge information from the server that created the charge, or may acquire the charge by the user's input. If you sum the electricity charges for all the loads calculated over a certain period, they can be the same as the electricity charges charged to the group during a certain period.

According to the metering unit 110 and the calculation unit 130, the user can grasp the amount of electricity used for each load and the electricity rate for each load. The user can easily establish a power saving measure by using the detected power consumption per load or the electricity charge per load.

For example, an A bulb (first load) and a B bulb (second load) of the same specifications may be provided to a specific plant corresponding to one group. It is assumed that A bulb and B bulb are on for the same time.

If the electricity price of the bulb A is 10000 won and the electricity price of the bulb B is 5,000 won for one month by the metering unit 110 and the calculation unit 130, The charge and the charge of the electricity used by the B bulb can be grasped clearly. In addition, the user can deduce that an electric bulb has an abnormality in the electric bulb A, which differs greatly from the electric bulb. Thus, the user can lower the electricity cost of the bulb A to 5,000 by replacing the specific load A with a new one. Since the power consumption per load is proportional to the electricity charge per load, the user can judge whether the A bulb is abnormal by using the power consumption per load.

In order to establish a power management policy for each load, it may be necessary to charge electricity for each load in the past. The storage unit 150 may be additionally provided in the electric power bill calculation apparatus of the present invention for establishing the load management policy for each load.

In the storage unit 150, history information for each load including the charge used for calculating the electric charge for each load, the electric power consumption per load, and the electric charge for each load can be stored in the storage unit 150.

The calculating unit 130 may calculate the electric charges for each load by multiplying the amount of electric power used for each load obtained from the metering unit 110 by a charge included in the charge.

Specifically, when the electricity rate of the group unit is imposed on a month-by-month basis, the calculation unit 130 can calculate the electricity rate of the first load by multiplying the electricity usage amount used by the first load for one month by the charge plan.

For example, if the electricity usage of the A bulb corresponding to the first load is 1 kWh (kilowatt-hour) and the charge per 1 kWh is 1 source, the calculation unit 130 calculates 1 (kWh) x 1 (won) x 24 ) × 30 (days) = 7200 won can be calculated.

The problem, however, is that the charge included in the fare is very complex and varies over time. For example, the rate may be relatively high at certain times, and may be relatively low at other times. Accordingly, in order to accurately calculate the electric charges for each load, the calculation unit 130 must grasp the charge rate of the charge plan for each predetermined interval in the course of time. In addition, the calculating unit 130 must grasp the electricity usage of each load in a predetermined interval.

FIG. 2 is a schematic diagram showing the operation of the calculation unit 130. FIG.

The calculating unit 130 may subdivide the first setting period 1st period with a minimum unit time that is the minimum time unit in which the charging fee is variable. The calculating unit 130 may analyze the fare and determine the shortest time in which the specific development fee is consecutively the same for the first setting period, and set the corresponding time as a minimum time unit.

For example, if a specific fee is lasting for one hour, changed to a different charge, and there is no other charge that lasts less than one hour, that hour can be the minimum hourly unit. If the minimum amount of time that a specific fee is lasted is 30 minutes, the minimum time unit can be 30 minutes.

If the first setting period is 24 hours a day and the minimum time unit is 1 hour, the calculating unit 130 can divide the 24 hours into 24 hours by dividing one hour.

The calculating unit 130 may set a level indicating that the development rate is high or low for each minimum time unit in which the first setting period is subdivided. The calculating unit 130 can set the level based on the charge rate or the input value of the user.

For example, the calculating unit 130 sets the first level a at 08 to 09, sets the second level b at 09 to 10, sets the third level c at 10 to 11, Three kinds of weighing corresponding to the level can be set in time unit.

Three levels Each level included in the weighing can be as follows.

The first level a may be the lowest light budget charge with the lowest charge, and the third level c may be the highest load rating charge with the highest charge. The second level b may be a mid-priced charge between the first level a and the third level c.

Usually, the first level a can be set at the lowest time zone in which the electricity usage of the entire group supplied by the electricity supplier is the lowest. Mainly, the first level a can be set in the night time zone.

The third level c can be set in the time zone in which the electricity consumption of the entire group is highest. Mainly, a third level c can be set at lunchtime or evening time when electricity usage is high.

The second level c may be set in a time zone where the electricity consumption of the entire group is normal.

Instead of each level, the actual fee, such as 63.2 won, 108.5 won and 164.7 won, may be set for each minimum time unit. However, it is advantageous that the level is set every minimum time unit instead of the actual development fee in consideration of the situation where the user's recognition convenience is improved and the development charge applied to each level is variable.

It is not possible to calculate the electricity rate by the minimum time unit only by the level set in each minimum time unit. In order to calculate the electricity rate by the minimum time unit, the actual development fee is required.

The calculating unit 130 may receive the charging fee applied for each level from the server that created the charging plan, or may provide a charging fee menu for each level to which the charging fee applied by level is input. The calculating unit 130 can automatically replace the level set in each minimum unit time with a matching charge that is matched when calculating the electric charge for each load.

The calculation unit 130 may divide the power consumption i of each load obtained from the metering unit 110 into a minimum unit time and set the minimum power unit i in each minimum unit time. The set minimum power consumption per unit time can be used to calculate the minimum charge per unit time and the electricity charge for the load.

According to the calculation unit 130 described above, the electricity rate for each load can be accurately calculated according to the charge rate of the charge rate varying over time.

For example, in the embodiment of FIG. 2, if the power consumption of the specific load is constant at 1 kWh for 24 hours, the calculation unit 130 calculates 12 (the number of the first level a) × 1 (kWh) × 63.2 (The development fee applied to the level a) +9 (the number of the second level b) × 1 (kWh) × 108.5 yen (the development fee applied to the second level b) +3 (the number of the third level c) × 1 × 164.7 won (the development fee applied to the third level c) = 1929 won can be calculated as the electricity rate used in the load during the first setting period. If such a state lasts for one month and 30 days, the total electricity rate of the load can be calculated by the calculating unit 130 to be 57870 won.

Also, when the first setting period, the level set for each minimum time unit, and the power usage amount are subdivided by the calculating unit 130 on a minimum time basis, the user can display the power usage information of the load and the electricity rate in the first setting period Unit or minimum time unit. Therefore, the power usage policy of the load can be established accurately and easily.

The first setting period, the level set for each minimum time unit, and the power usage amount subdivided by the minimum time unit set by the calculating unit 130 may be stored in the storage unit 150. [

3 is a schematic view showing the interface screen 10 generated by the calculation unit 130. As shown in FIG.

The calculating unit 130 may generate the interface screen 10 displayed on the display. The interface screen 10 may be composed of image data, character data, or the like.

The interface screen 10 may be provided with a first menu ① and a charge input menu 레벨 for each level.

The first menu (1) can be displayed by subdividing the first setting period into a minimum time unit in which the charging rate of the charging plan is variable. Also, the first menu (1) may display a level indicating that there are a large and small amount of the development fee per minimum time unit.

In FIG. 3, the minimum time unit is set to 1 hour, and the 24 hours corresponding to the first setting period is subdivided into 24 units in units of one hour. The levels shown in Fig. 3 are classified into three types as a first level a, a second level b, and a third level c.

For example, each level a, b, and c can be classified into a load classification by season, a load classification by season, and a peak load with a light load, a heavy load, and a heavy load. In the case of light load, it can be matched to a relatively small fee. In case of peak load, it can be matched to a relatively large charge rate. In the case of a heavy load, it can be matched to the intermediate charge between the light load and the maximum load.

The first menu (1) may be used to add a tariff applied to a specific date. In addition, a specific load applied to each minimum time unit can be set by the first menu (1).

4 is a schematic view showing a part of the first menu.

The level applied to the subdivided period '00 to 01' in the subdivided first setting period can be automatically set by the calculating unit 130 that analyzes the charge received from the server. Or the levels applied to the subdivided sections '00 to 01' may be set by the user. 4 shows a state where the level is set by the user.

When the user selects a level displayed next to the segmented section with a mouse cursor or the like, the type of the selectable level can be displayed. Selecting a particular type of level may change the previously selected level to a particular type of level. Or each time the level displayed next to the subdivided section is selected, the type of the level may be changed in order.

Referring back to FIG. 3, the charging fee of the charging plan applied for each level can be inputted in the charge input menu e by level. The fee charged to level entry menu ⓔ can be the electricity rate when the average 1kW is used for minimum time unit.

The calculating unit 130 may obtain the amount of electric power to be used in a specific load during a specific section subdivided by the measuring unit 110, and may multiply the charging rate inputted in the level-based charge input menu e. The result of the multiplication may be imposed on the load during the specified period of granularity, or may be the electricity rate used by the load.

In the charge entry menu for each level, a menu in which a peak charge rate is input may be added. Peak pricing can be applied in place of the normal pricing rates discussed above for high peak demand days.

The peak time can be set through the third menu ③ provided in the interface menu.

The interface screen 10 may be provided with a second menu ② for managing the charge plan.

If the current fare scheme is changed through the second menu (2), at least one of the first menu (1) or the charge input menu for each level may be changed according to the changed charge plan.

In the second menu (2), the status of the service plan and the current service plan may be displayed. Specifically, the second menu (2) may include a menu 'in use' in which the current state and the charge in use are displayed. When the 'in use' menu is selected, the database or the current usage plan stored in the storage unit 150 may be applied to the first menu and the level-by-level charge input menu. Therefore, at least one of the first menu or the charge input menu for each level may be changed according to the plan currently being used. However, if the menu displaying the current rate is selected, the new charging plan is erased, so a confirmation procedure is necessary.

An empty menu 20 right below the 'in use' menu may be a menu for viewing a reserved plan. If there is a new plan to replace the plan currently being used at a specific time in the future, the identifier of the new plan may be displayed in the empty menu 20. If the empty menu 20 does not display an identifier such as the name of a new plan, there is no reserved plan.

And a menu for managing a list of charge plans may be provided in the second menu (2).

For example, the second menu includes a list button list for displaying a list of charge plans at the time of selection, a history button history for displaying the existing charge plans at the time of selection, and a charge plan displayed on the current interface screen 10 at the time of selection, A save button save to save to the list may be provided.

A creation menu 30 may be provided in the second menu (2) to add a list of new plans.

5 is a schematic diagram showing the creation menu 30.

The creation menu 30 may be provided with a creation button 31 for creating a new plan when selected. For example, the creation button 31 may be a '+' button displayed at the bottom of the creation menu 30 of FIG.

Referring to the creation menu 30 of FIG. 3, a list B2 of pricing schemes currently displayed on the interface screen 10 is displayed.

 If the generation button 31 is selected in this state, a new plan list 'system0' can be generated as shown in FIG. 'system0' is automatically assigned by the calculation unit 130 and can be changed to another name inputted by the user. The user can activate a mode to modify the name of the new plan list by double clicking on the new plan list 'system0', and then enter a new name.

A delete button 33 '-' may be provided next to each charge list. If the delete button 33 matched to the specific plan list is selected, the specific plan list can be removed from the creation menu 30. [

The interface screen 10 may be provided with a third menu < 3 >

The third menu ③ may include a holiday setting menu ⓗ, a peak setting menu ⓟ, a charge reservation menu r, a new charge application menu ap, a charge modification menu m, a loading menu DB, and the like.

The level assigned every minimum time unit may also be given in units of days. For example, in the case of a holiday, a light load corresponding to the first level a may be applied at all time zones. The holiday setting menu ⓗ can be used when you want to apply a certain level in days.

The dates that are selected through the holiday setting menu 주로 can usually be applied at lower levels.

The peak day setting menu 일 can be a menu for giving a level on a daily basis similar to the holiday setting menu. However, unlike the holiday setting menu, a peak charge rate can usually be applied to a date selected through the peak setting menu.

If the fare schedule reservation menu r is selected, the fare plan to be applied to the next period can be stored in advance.

When the new plan application menu ap is selected, the fare created through the currently displayed interface screen 10 can be immediately applied to the load. At this time, the existing fare may be stored in the storage unit 150 or the database, and may be connected to the history button history. That is, when the history button is selected, the existing plan can be displayed in the list.

If you select menu m, your current plan will be overwritten with your current plan and will not be applied to history.

The interface screen 10 may be provided with special day input menus ⓗ and 되는 for setting a holiday or a peak day for which the charge of the plan is changed. The calculating unit 130 may change the billing rate of the fare plan when the holiday or peak day entered through the special day of the week input menu arrives.

For example, when a specific peak day is set through the special day input menu, a menu in which the peak charge rate is input among the charge input menus per level may be used for calculating the charge for each load.

The special day input menu may include at least one of a holiday setting menu ⓗ and a peak setting menu..

Fig. 6 is a schematic diagram showing the holiday input menu 50. Fig.

When the holiday setting menu ⓗ of the third menu is selected, the holiday input menu (50) holiday editor for entering or selecting the holiday can be displayed.

The holiday input menu 50 may include a holiday setting item 51, a holiday selection item 52, a weekend setting item 53 weekend, a holiday list item 57, and a storage item 59 save .

The holiday setting item 51 may be for setting a holiday and setting a name on the date entered by the user.

The holiday selection item 52 may be for selecting a holiday that has been stored in advance.

The weekend setting item 53 may be for setting a level to be used for a weekend or a holiday.

When editing the holiday setting item 51, the holiday selection item 52, and the week setting item 53 and then selecting the first apply button 55, edited contents can be displayed in the holiday list item.

The holiday list item allows you to view holidays that you have set and edit and change the levels for the holidays. 6, all the levels indicated in the holiday item are set to the first level a, but the first level a can be changed to another level using the holiday item.

The storage item may be for storing the holiday list displayed in the holiday list item in the storage unit 150 or the database.

Fig. 7 is a schematic diagram showing the peak day input menu 60. Fig.

When the peak day setting menu ⓟ of the third menu is selected, the peak day editor (60) peak day editor can be displayed to enter or select peak days.

The peak day setting menu item (60) includes a peak day setting item (61) peakday, a peak day list item (65) list, and a storage item (67) save.

The peak day setting item 61 may be for setting a period for applying a relatively high peak rate among the plural levels.

The contents set in the peak day setting item (61) can be displayed in the peak day list item (65) when the second apply button (63) is selected.

The peak day list item 65 may be for ascertaining the set peak charge period.

A cancel button 66 may be displayed in the list of peak charge periods displayed in the peak day list item (65). If the cancel button 66 is selected, the peak charge period list may be deleted. The cancel button 66 may be similarly applied to the holiday list item in which the holiday is displayed.

The storage item 67 may be for storing a list of peak toll periods displayed in the peak to-do list item 65 in the database or storage unit 150.

On the other hand, the charge rate of the plan can be changed in units of months or seasons as well as hours and days. A monthly fare setting menu ⓜ may be provided on the interface screen 10 in order to set a charging rate that varies on a month or season basis.

3, the interface screen 10 may be provided with an additional button 43 for adding a monthly fare setting menu. The add button 43 may also be used when adding the first menu.

When the add button 43 is selected, a monthly fare setting menu for setting the monthly charge rate of the charge plan can be displayed on the interface screen 10.

The calculating unit 130 may calculate the electricity charge for each load in accordance with the monthly development charge matched with the current month.

Monthly rate settings menu can be displayed in order from January to December. When the desired month is selected and the applied fare type is selected through the type menu 45 displayed on the interface screen 10, and the third application button 41 is selected, the fare is applied to the selected month. At this time, the applicable fee type may include the first menu. In other words, if the third application button 41 is selected, the fare currently displayed in the first menu can be applied to the corresponding month.

If the add button 43 is selected in a state that both the monthly fare setting menu and the first menu are displayed, an applicable fare type can be added. A plurality of application fee types may be provided, and setting contents of the first menu may be applied to each application fee type.

For example, the first application fee type w in FIG. 3 may be the setting content of the first menu applied in the winter season. The second application fee type s, f may be the setting content of the first menu applied in spring and autumn. The third application fee type s may be the setting content of the first menu applied in summer.

The user can apply a specific applicable fare type to the month by selecting a desired month, selecting one of a plurality of applicable fare types, and then selecting a third apply button 41.

The applicable fare type applied to a specific month may include the setting contents of the first menu and may be continuously applied during the corresponding month.

8 is a flowchart illustrating a method of calculating a power charge of the present invention.

When the electric power rate calculation device constitutes a part of an HMI (Human Machine Interfac) system, the electricity consumption amount of the metering section or the electricity rate calculated in the calculation section can be expressed using a tag used in the HMI. The tag may be generated by a separate tag management unit (not shown) or may be generated by the metering unit 110 or the calculation unit 130.

The tag management unit may generate a list of all tags used in the HMI system (S 510).

Inside the HIM system, it is not possible to know which tag represents the amount of power used by each load. The tag management unit may generate a power amount tag indicating a power usage amount for each load obtained by the metering unit (S 520).

Since the power amount tag is defined as a tag expressing the amount of power, the tag management unit can additionally generate the electric fare tag used for calculation of the electric charge for each load or display of the display performed in the calculating unit (S 530). The power bill tag may be connected to the power bill tag by the user's selection or tag management unit. In addition, a power bill tag can be added to the tag list.

The calculating unit may subdivide the first setting period into a minimum time unit in which the charging rate of the charging plan is varied using the interface screen displayed on the display. In addition, the calculating unit may set a charging rate applicable to the minimum time unit using the charging plan (S 540). The contents set by the calculation unit may be stored in the storage unit 150. [

The fare used in the calculation unit can be obtained periodically from the server. The calculator may update the existing plan with a periodically obtained plan. Therefore, even if the charging fee included in the rate plan changes, the automatically changed content can be applied.

The metering unit or the calculating unit can collect the amount of power used by each load in real time using the power amount tag, and can grasp the amount of power used for the minimum time unit. In addition, the calculating unit may calculate the electricity rate by the minimum time unit using the amount of electricity used for the minimum time unit and the development fee applied for each minimum time unit (S550). At this time, the charging fee applied for each minimum time unit may be extracted from the storage unit.

On the other hand, the electricity amount used for the minimum time unit and the electricity rate calculated for each minimum time unit can be stored in the storage unit.

The calculating unit or the tag managing unit may update the electricity rate tag by the minimum time unit stored in the storing unit. A power tariff tag with an updated minimum hourly electricity bill can be displayed on the display.

The power bill tag can be generated based on the data that the user will output on the screen. The power bill tag can be configured to output the previous time, the previous day, the day, the specific date, and the like.

As an example, a power bill tag may be:

panel1 Daily Light Electricity Charge

panel1 Today's Heavy-Duty Electricity Fee

panel1 Today's maximum load power charge

panel2 Daily Light Electricity Fee

panel2 Today's Heavy-Duty Electricity Fee

panel2 Today's maximum load power rate

The prefix panel1 may be for a first load and the prefix panel2 may be for a second load.

A plurality of electric power bill tags to be output through the display can be generated. For example, if the power charge tag is generated for displaying the current light load charge for panel 1, the heavy load charge for day 1 of panel 1, the maximum load charge for day three of panel 1, and the electric power charge for displaying three electric charges, Three electric charges can be generated.

To prevent the calculation of the duplicated power billing tag, the calculating unit may retrieve the same power billing tag by searching the entire power billing tag. The calculating unit can calculate the electric power charge at a minimum time unit by extracting only the corresponding electric energy tag. The charges calculated in the calculation unit are stored in the storage unit and can be updated by calculating only the necessary parts in each power charge tag.

9 is a graph showing power consumption per hour.

The data obtained by the metering unit may be a value that increases steadily as shown in FIG. The amount of power used for one hour can be expressed as the difference value obtained by subtracting the total time power from the current time power.

For example, if the amount of power obtained at time 0 is 100 kWh and the amount of power obtained at 1 is 180 kWh, the amount of power used between 0 and 1 may be calculated as 180 - 100 = 80 kWh by the calculating unit.

On the other hand, there is a limit on the amount of power measured by a meter or the like. At this time, if the threshold value is exceeded, it is reset to 0 and transferred to the metering unit, and the data of the corresponding interval can be added to the previous time amount of power from the newly accumulated value from the reset point to zero.

If the limit value is 99999 kWh, the power consumption at 0 o'clock is 99980 kWh, and the power at 1 o'clock is 30 kWh, the amount of power used between 0 and 1 o'clock is 99999 (limit value) - 99980 Can be calculated.

When the power consumption limit value is not known, the calculating unit or the measuring unit automatically checks the point where the electric energy is reset to 0 (the point when the electric power consumption is reset to 0 or more because of a large amount of electric power), and writes the corresponding portion to the storage unit . The reset point stored in the storage unit can be used as a limit value in calculating the used power amount.

Electricity charges can be calculated by multiplying the amount of electricity by the hourly rate.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

10 ... interface screen 20 ... blank menu
30 ... Create menu 31 ... Create button
33 ... Delete button 41 ... 3rd apply button
43 ... Add button 45 ... Type menu
50 ... Holiday input menu 51 ... Holiday setting items
52 ... Holiday selection item 53 ... Weekend setting item
55 ... First application button 57 ... Holiday list item
59, 67 ... Save item 60 ... Peak days input menu
61 ... Peak days setting item 63 ... 2nd apply button
65 ... Peak day list item 66 ... Cancel button
110 ... Metering unit 130 ... Calculating unit
150 ... storage

Claims (9)

A metering unit for acquiring a power usage amount of each load included in the group when an electricity charge is imposed on the basis of a group including a plurality of loads based on a predetermined charging plan;
A calculating unit for calculating an electricity rate for each load by using the rate plan and the amount of power used by each load;
And a storage unit for storing history information for each load including the fare, the power usage by the load, and the electricity charge by the load,
The tariff includes a tariff varying with time,
Wherein the calculation unit divides the first setting period into a minimum time unit in which the charging fee is variable,
Wherein the calculating unit sets a level indicating that the charging rate is high or low for each of the minimum time units in which the first setting period is subdivided,
The calculating unit generates an interface screen displayed on the display,
A first menu in which the first setting interval is divided and displayed in a minimum time unit in which the charging rate of the fare is varied and a level indicating that the charging rate is high or low is displayed for each minimum time unit, A charge input menu for each level into which the charge rate is inputted is provided,
A second menu for managing the fare plan is provided on the interface screen,
When the current fare is changed through the second menu, at least one of the first menu or the level-based charge input menu is changed according to the changed charge,
A special day of the week menu is set on the interface screen,
And the calculating unit changes and applies the charge of the charge when the holiday entered through the special day input menu arrives.
The method according to claim 1,
The metering unit includes a sensor installed in each load for acquiring the power consumption per load, or a sensor installed in a commercial line connecting each load with a commercial power source,
The calculating unit or the metering unit automatically checks a point at which the amount of power is reset to zero and records the corresponding part in the storage unit as a power amount reset point,
Wherein the reset point stored in the storage unit is used as a limit value for calculating the amount of power used by the load.
delete delete delete delete delete The method according to claim 1,
The calculating unit may generate an interface screen displayed on the display,
The interface screen is provided with a monthly fare setting menu for setting a monthly fee for the charge plan,
Wherein the calculating unit calculates the electricity charge for each load in accordance with a monthly charge that matches the current month.
A power quantity tag indicating a power consumption amount for each load when an electricity charge is imposed in a group unit including a plurality of loads based on a predetermined charge, calculating an electric charge for each load connected to the electric energy quantity tag, Generating a power charge tag to be used;
Subdividing a first set period by a minimum time unit in which a rate of charge of the tariff is varied using an interface screen displayed on the display and setting a tariff applied to the minimum time unit using the tariff;
Collecting the power amount tag and determining an amount of power used for the minimum time unit;
Calculating an electricity rate for each of the minimum time units using a power amount used for the minimum time unit and a development fee applied for each minimum time unit;
Storing the electric power used for the minimum time unit and the electric fee calculated for the minimum time unit in a storage unit;
And updating the electricity rate tag by the minimum time unit stored in the storage unit,
A special day input menu is provided on the interface screen in which a holiday for changing a billing rate of the fare plan is set,
And the calculating unit changes the billing rate of the fare plan when the holiday entered through the special day input menu is reached.

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