KR101443025B1 - Apparatus and method for managing power in load - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling power of a load, and is for monitoring and effectively controlling power usage of loads used in a building. A power control apparatus according to the present invention includes an interface unit, a storage unit, and a control unit. The interface part is connected to the loads. The storage unit stores the power usage target value of the initialized loads and the user preference including the control target load among the loads. The control unit monitors whether or not the power consumption of the loads exceeds the threshold set based on the power usage target value. If the monitoring result exceeds the threshold value, the controller uses the power usage for the control target load through the interface unit according to the user preference .

Description

[0001] APPARATUS AND METHOD FOR MANAGING POWER IN LOAD [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control apparatus and method, and more particularly, to a power control apparatus and method for controlling power usage of a load installed in buildings such as homes, offices, And more particularly, to a power control apparatus and method for controlling a load.

In buildings such as homes, factories, shopping malls, and offices, there are various types of loads that are devices that use electric power. Inefficient use of the electricity required to drive these loads wastes energy, which can contribute to the increase in greenhouse gas emissions, which is a major contributor to global warming. In addition, consumers who need to use electricity are burdened with additional electricity charges.

For this reason, it is necessary to efficiently manage the power used in buildings. The ultimate goal of efficient power management in buildings is to minimize the consumption of electricity consumed to control indoor environments such as cooling, heating, ventilation, and lighting without compromising the comfort of the residential space.

On the other hand, even if technical measures have been taken to save power in a building, it is difficult to expect the effect without a detailed and continuous power management of the actual building usage, system efficiency, normal operation and operation schedule.

Therefore, a separate building power manager is installed to manage the energy consumption level and driving condition of the building thoroughly so that the building is always operated with the best power efficiency.

In addition, the company focuses on continuous technology development related to analysis of energy consumption type according to the inherent thermal characteristics of the building, diagnosis of abnormality of the system, and the like.

In recent years, the United Nations Framework Convention on Climate Change (UNFCCC) has further strengthened its obligations to reduce greenhouse gas emissions, and it is difficult to avoid pressure from the Korean government to bear the obligation to reduce the level of advanced countries after joining the Organization for Economic Cooperation and Development (OECD).

Therefore, the development of clean energy and environment-friendly industries that can minimize greenhouse gas emissions will be urgent, and buildings can be a burden to weaken the competitiveness of companies if they are not energy saving buildings that emit less greenhouse gas .

However, at present, there is a measure to prevent the loss of electric power by simply disconnecting unnecessary electric power from the outlet or the user to directly cut off the standby power, and the power control that integrally manages the power use of the load is properly performed .

It is therefore an object of the present invention to provide a load power control apparatus and method capable of integrally managing power usage of loads.

It is another object of the present invention to provide an apparatus and method for controlling power of a load that can efficiently control power usage of loads installed in a building.

It is another object of the present invention to provide a load power control apparatus and method for controlling power usage of a load provided in a building in consideration of a usage pattern of a user within a set power target value.

It is still another object of the present invention to provide a load power control apparatus and method for controlling power use of a load according to the importance of the load.

According to another aspect of the present invention, there is provided a method of controlling a power control apparatus, the method comprising: setting a power usage target value of a load, the power control apparatus including: receiving a user preference including a load to be controlled among the loads; The apparatus comprising: monitoring whether a power usage of the loads exceeds a threshold set based on the power usage target value; and when the monitoring result exceeds a threshold, the power control apparatus controls the power control apparatus according to the user preference And controlling power usage for the target load.

In the power control method of a load according to the present invention, in the setting step, the power usage target value may be set based on a power usage cost or a power usage amount for each period.

In the power control method of a load according to the present invention, in the setting step, when the period is changed in a state where the power use target value is set, the power control apparatus changes the power use cost or the power consumption amount according to the changed period have.

In the power control method of a load according to the present invention, in the setting step, the power control apparatus can maintain the power use cost or the power consumption amount set in the predetermined power use target value even if the period is changed in the state in which the power use target value is set have.

In the power control method of a load according to the present invention, in the setting step, when the power usage cost or the power consumption amount is changed while the power use target value is set, the power control apparatus changes the power usage cost Or by changing the period according to the power consumption.

In the power control method of a load according to the present invention, in the setting step, when the power usage cost or the power usage amount is changed while the power use target value is set, the power control device can maintain the preset power use target value have.

In the power control method of a load according to the present invention, in the setting step, the power control apparatus sets the power use target value according to a user's selection signal, sets the power use target value based on a statistic for a previously set power use target value, It can be set as default.

In the power control method of a load according to the present invention, the user preference may further include a control range of the control object load, a control time of the control object load, a weather condition, an unexpected event or a user schedule in the input step .

In the power control method of a load according to the present invention, in the monitoring step, the threshold value may be set lower than the power usage target value.

In the power control method for a load according to the present invention, the power control device, which is performed in a previous step including the monitoring step, divides the power usage target value into unit power use target values for a predetermined period, The method may further include the step of dividing the data into unit threshold values for a predetermined period. At this time, in the monitoring step, the power control apparatus may monitor whether or not the power usage amount of the loads over the predetermined period exceeds the unit threshold value.

In the power control method for a load according to the present invention, the predetermined period in the dividing step may be shorter than the period set in the power usage target value, and may be one day, week, or month.

In the power control method of a load according to the present invention, in the controlling step, the power control device may output an alarm or warning message.

The power control method of a load according to the present invention is characterized in that the power control device is performed after the step of outputting an alarm or warning message in the controlling step, If the request to change the power usage target value is input in the inquiring step, the power control device may further perform the step of performing the setting again from the setting step.

In the load power control method according to the present invention, the user preference may include the importance of the load to be controlled. At this time, in the controlling step, the power control device can stop the power supply from the control target loads in order of decreasing importance.

The power control method of a load according to the present invention may further include the steps of: when the monitoring result threshold value is not exceeded, the power control device maintains the monitoring step; and when the monitoring time is within a period set in the power usage target value The power control apparatus may further include a step of matching the set power usage target value with the inputted user preference and storing the set power usage target value.

The power control method of a load according to the present invention may further include a step of performing again from the monitoring step when the power control apparatus does not reach the set period as a result of the determination.

The present invention also provides a load power control apparatus including an interface unit, a storage unit, and a control unit. The interface unit is connected to the loads. The storage unit stores a power usage target value of the reserved loads and a user preference including the control target load among the loads. The control unit monitors whether or not the power usage of the loads exceeds a threshold set based on the power usage target value, and when the monitoring result exceeds the threshold, the control unit controls the control through the interface unit according to the user preference Controls power usage for the target load.

The power control apparatus for a load according to the present invention may further include an input unit for receiving a user's selection signal. In this case, the control unit receives the power usage target value of the loads through the input unit, stores it in the storage unit, receives the user preference including the control object load among the loads through the input unit, have.

In the power control apparatus for a load according to the present invention, the controller may set the power usage target value based on a power usage cost or a power consumption amount for each period.

In the power control apparatus for a load according to the present invention, the control unit may divide the power usage target value by a unit power use target value for each period and divide the threshold value into unit threshold values for the predetermined period. In the monitoring, the controller may monitor whether or not the power usage of the loads exceeds the unit threshold value.

In the load power control apparatus according to the present invention, the user preference may include the importance of the load to be controlled. At this time, if the monitoring result exceeds the threshold value, the controller may cut off the power supply from the control target load in the order of low importance.

The load power control apparatus according to the present invention may further include an output unit for outputting an alarm or warning message. At this time, if the control unit exceeds the monitoring result threshold value, the control unit may output an alarm or warning message through the output unit. The control unit inquires of the output unit whether or not to change the set power use target value after outputting the alarm or warning message, and when the request for changing the power use target value is inputted through the input unit, the power use target value can be reset have.

In the load power control apparatus according to the present invention, the controller may maintain the monitoring state when the monitoring result threshold value is not exceeded. Wherein the control unit judges whether the monitoring time has reached a time period set in the power usage target value, and when the time reaches a set period as a result of the determination, matches the input user preference with the set power usage target value, And can be stored in the storage unit.

The power control apparatus of the load according to the present invention can integrally manage the power use of the loads.

Further, the load power control apparatus according to the present invention can efficiently control the power usage of the loads installed in the building. At this time, the power control apparatus of the load can control the power use of the load provided in the building in consideration of the usage pattern of the user within the range of the set power target value.

Further, the load power control apparatus according to the present invention controls the power use of the load according to the importance of the load. That is, exceeding the set threshold value in comparison with the set power target value, the power control device of the load sequentially cuts off the power supply to the load in accordance with the importance of the set load to prevent the power control target from exceeding the set power target value . Alternatively, the load power control device sequentially controls the power supply to the load according to the importance of the load according to the usage pattern of the user, thereby controlling the power usage in the range of the set power target value.

Also, since the load power control apparatus according to the present invention can set the usage pattern of the user based on the used conditions such as the control object, the control range, the control time, and the weather condition, power control according to the building situation can be performed.

1 is a view showing a power control system of a load according to an embodiment of the present invention.
FIG. 2 is a view showing the power control apparatus of FIG. 1. FIG.
3 is a flowchart illustrating a method of controlling power of a load using a power control apparatus according to an embodiment of the present invention.
FIG. 4 is a detailed flowchart of the step of determining whether the threshold value is exceeded from the setting step of FIG. 3. FIG.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

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

1 is a view showing a power control system of a load according to an embodiment of the present invention.

1, a power control system 100 of a load 10 according to the present embodiment includes a plurality of loads 10 and a power control apparatus 20 for integrally managing power use of a plurality of loads 10 ).

The plurality of loads 10 are loads used in a building, such as a cooling facility, a heating facility, a ventilation facility, an illumination facility, an elevator, and the like, but are not limited thereto.

The power control device 20 integrally manages the power usage of the plurality of loads 10, and controls the power usage for the selected target load load 11 according to the user preference, so that the power used in the building So that it can be efficiently used.

In this way, the power control system 100 according to the present embodiment monitors the power usage of the loads 10 provided in the building based on the power usage target value set by the user through the power control device 20, Controls power usage within a range that does not deviate from the target value. That is, the power control device 20 can control the power usage of the load 10 provided in the building in consideration of the usage pattern of the user within the set power usage target value.

The power control apparatus 20 according to this embodiment will now be described with reference to FIGS. 1 and 2. FIG. Here, FIG. 2 is a view showing the power control device 20 of FIG.

The power control apparatus 20 according to the present embodiment includes an interface unit 21, a storage unit 25 and a control unit 29, and may further include an input unit 23 and an output unit 27.

The interface unit (21) mediates the connection of the loads (10) and the control unit (29). The interface unit 21 may supply or cut off power to the loads 10 in accordance with the control signal of the control unit 29. At this time, a cable capable of supplying power or transmitting a control signal to the interface unit 21 may be used.

The input unit 23 provides a plurality of keys for operating the power control device 20 and generates a selection signal according to the user's selection of keys and transmits the generated selection signal to the control unit 29. The user can input the power usage target value through the input unit 23 or input the user preference. The input unit 23 may be an input device such as a keypad, a pointing device such as a touch pad, or a touch screen.

The storage unit 25 stores a program necessary for controlling the operation of the power control device 20 and information generated during the execution of the program. The storage unit 25 stores an execution program for integrally controlling the power usage of the loads 10 based on the set power usage target value. The storage unit 25 stores the power usage target value of the predetermined loads 10 and the user preference including the control target load 11 among the loads 10. [ Alternatively, the storage unit 25 may match and store the currently set power usage target value, the power usage target value set before the user preference and the user preference corresponding thereto. The storage unit 25 can selectively store only the successfully used power usage target value and the corresponding user preference among the previously set power usage target value and user preference.

The output unit 27 outputs information stored in the storage unit 25, including various function menus executed by the power control unit 20, as sound or video. That is, the output unit 27 includes a display unit or sound source processing unit.

The display unit displays a function menu or message for power control under the control of the control unit 29 as an image. The image includes a set menu of power usage target values, an input menu of user preferences, an alarm or warning message, and the like. The user can set or change the power usage target value through the setting menu of the power usage target value. The user preference can be inputted through the input menu of the user preference. The alarm or warning message may be displayed on the display unit when the threshold value is exceeded according to the set power usage target value. At this time, an LCD (Liquid Crystal Display) or a touch screen may be used as a display unit. The touch screen serves both as a display device and as an input device.

The sound source processing unit outputs the sound source to the speaker according to the control of the control unit 29, digitizes the sound source to be micro-input, and transmits the digitized sound source to the control unit 29. The sound source processing unit may receive a user's selection signal as a voice and transmit it to the control unit 29. The sound source processing unit may output an alarm or warning message under the control of the control unit 29.

The control unit 29 is a microprocessor that performs the overall control operation of the power control device 20. [ The control unit 29 controls the power usage of the loads 10 based on the set power usage target value and controls the power usage of the loads 10 so as not to exceed the set power usage target value. That is, the control unit 29 monitors whether or not the power usage of the loads 10 exceeds a threshold value set based on the set power usage target value. The control unit 29 controls the use of power for the control target load 11 via the interface unit 21 according to the user preference when the monitoring result threshold value is exceeded.

At this time, the controller 29 may set the power usage target value in accordance with the user's selection signal through the input unit 23, or may set the power usage target value based on the statistics on the previously set power usage target value, or may set the default value.

The control unit 29 receives and sets the power usage target values of the loads 10 through the input unit 23 and stores them in the storage unit 25. [

Here, the power usage target value can be set in the setting menu of the power usage target value based on the electric power usage cost or the electric power consumption amount per period. The period may be hour, day, week, month, quarter, or year, but is not limited thereto. The power usage cost or power consumption may be the power usage cost or power consumption for the total load used in the building, or the power usage cost or power consumption for the loads with high power usage among the loads installed in the building. In other words, it is desirable to set the power usage target value based on the power consumption of the entire load used in the building. However, even if the power use target value is set based on the power use amount of the load with high power usage, And controllable.

The setting menu of the power usage target value may provide information on the power usage amount for each period according to the load 10 installed in the building so that the user can easily set the power usage target value. The power consumption per period may provide information on the power consumption of the load 10 installed in the actual building or the power consumption of the general load 10 in the actual building.

When the period, the power usage cost, or the power usage amount is changed in a state where the power usage target value is set, the control unit 29 can reset the power usage target value as follows.

First, when the period is changed, the control unit 29 may change the power consumption cost or the power consumption amount according to the changed period. That is, the control unit 29 can change the power usage cost or the power consumption amount in proportion to the changed period based on the power usage cost or the power usage amount set for each period.

Even if the period is changed, the control unit 29 can maintain the power consumption cost or the power consumption amount set in the predetermined power usage target value.

When the power usage cost or the power usage amount is changed, the control unit 29 can change the period according to the power usage cost or the power usage amount changed at the predetermined power usage target value. That is, the control unit 29 can change the period in proportion to the changed power usage cost or power consumption amount based on the power usage cost or the power usage amount set for each period.

If the power usage cost or the power usage amount is changed, the control unit 29 can maintain the period set in the predetermined power usage target value.

The control unit 29 receives the user preference including the control target load 11 among the loads 10 through the input unit 23 and stores the user preference in the storage unit 25. The user preference may further include a control range of the controlled object load 11, a control time of the controlled object load 11, a weather condition, an unexpected event or a user schedule, including the controlled object load 11. Here, the control range of the controlled object load 11 is not limited to the case where the type of the load 10 to be controlled and the plurality of loads 10 of the same type are included among the loads 10 Or the like. The weather condition includes weather information of the location where the building is located. An unexpected event includes an event due to a power failure or a power failure. And the user schedule includes information about the schedule in which the user uses the building.

The user can input the user preference through the input menu of the user preference of the output unit 27. [ The input menu of the user preference can provide information on the type of load that the user can select and the amount of power consumption per hour of the load. The user can select the control target load 11 which needs to be controlled among the loads 10. [ The user can set importance for the control target loads 11 together. The importance of the load 11 to be controlled can be used for stopping the power supply or for maintaining the power supply.

The control unit 29 performs monitoring based on a threshold value set based on the power usage target value, and the threshold value is preferably set to be lower than the power usage target value.

The control unit 29 can perform monitoring by a predetermined period by dividing the set period into a predetermined period based on the period set in the power usage target value. That is, the power usage target value is set, the control unit 29 divides the set power use target value by the unit power use target value for a predetermined period. The control unit 29 divides the threshold value by a predetermined period to calculate a unit threshold value for a predetermined period. The controller 29 may monitor whether or not the power consumption of the loads 10 in each of the predetermined periods exceeds a unit threshold value. In this case, the predetermined period is set to be shorter than the period set in the power usage target value, and may be set to one of, for example, one week, week, or month.

In this way, the controller 29 monitors the power consumption for a predetermined period of time and manages the power usage of the loads 10 so as not to exceed the power usage target value for each predetermined period, thereby managing power usage of the loads 10 more efficiently .

When the monitoring result threshold value is exceeded, the control unit 29 can output an alarm or warning message through the output unit 27. [ Accordingly, the user can recognize that the power usage of the loads 10 is close to the set power consumption target set through the alarm or warning message output through the output unit 27.

If the monitoring result threshold value is exceeded, the control unit 29 can stop the power supply to the controlled object load 11 by referring to the user preference. That is, when the importance of the controlled object load 11 is included in the user preference, the control unit 29 can stop the power supply from the order of importance of the controlled object load 11. For example, when the control target load 11 is a plurality of elevators and the importance is set according to the position where the elevator is installed, the control unit 29 can stop the power supply from the elevator having low importance and stop the operation. At this time, even if the elevator is in need of interruption of power supply due to its low importance, when the elevator is currently in operation, the control unit 29 stops power supply in a state where the operation of the elevator is completed. In other words, when the operation is stopped while the person is riding in the elevator, the person who is in the elevator risks mental and physical pain and a risk of a safety accident. Therefore, the control unit 29 controls the elevator Lt; / RTI >

If the monitoring result threshold value is exceeded, the control unit 29 can inquire through the output unit 27 whether the set power use target value has been changed. For example, the control unit 29 may output a message inquiring whether the power usage target value set in the output unit 27 has been changed or not. When the request for changing the power usage target value is input according to the selection signal through the user's input unit 23, the control unit 29 outputs the setting menu of the power usage target value through the display unit to perform the process of resetting the power usage target value have.

On the other hand, if the monitoring result threshold value is not exceeded, the control unit 29 maintains the current monitoring state. The control unit 29 determines whether or not the monitoring time has reached the period set in the power usage target value. If it is determined that the predetermined period has not been reached, the control unit 29 maintains the current monitoring state. As a result of the determination, when the set period is reached, the controller 29 stores the set power usage target value and the inputted user preference in a matching manner. That is, the control unit 29 matches the information about the user preference and the power usage target value used for the successfully performed power control, and stores the information in the storage unit 25. The control unit 29 may provide the stored information for reference when the user sets the power usage target value and the user preference in the future.

A power control method of the load 10 using the power control apparatus 20 according to the present embodiment will be described with reference to FIGS. 1 to 4. FIG. 3 is a flowchart illustrating a power control method of the load 10 using the power control apparatus 20 according to the embodiment of the present invention. FIG. 4 is a detailed flowchart of the step of determining whether the threshold value is exceeded from the setting step of FIG. 3. FIG.

First, in step S51, the power control device 20 sets a power usage target value. For example, the power control device 20 receives and sets the power usage target value of the loads 10 through the input unit 23 in the power usage target value setting menu, and stores the set power usage target value in the storage unit 25. [ The setting menu of the power usage target value includes a period item necessary for setting the power usage target value, and a power usage cost or power consumption item. The power control device 20 sets a threshold value necessary for performing monitoring based on the set power usage target value.

At this time, although the power control apparatus 20 has set an example of setting the power use target value according to the user's selection signal, it may be set based on statistics on the previously set power use target value, or may be set as a default.

Next, in step S57, the power control device 20 receives the user preference including the control target load 11 among the loads 10. That is, the power control apparatus 20 receives the user preference including the control target load 11 among the loads 10 through the input unit 23, and stores the user preference in the storage unit 25. The user preference can be input from the input menu of the user preference. The user preference may further include a control range of the controlled object load 11, a control time of the controlled object load 11, a weather condition, an unexpected event or a user schedule, including the controlled object load 11.

Next, in step S59, the power control device 20 monitors whether the power consumption of the load 10 exceeds a preset threshold value based on the set power usage target value. The power control device 20 monitors the power consumption of the load 10 based on the threshold value to control the power consumption of the load 10 so as not to exceed the power usage target value.

In step S59, the power control unit 20 may perform monitoring by a predetermined period by dividing the set period into a predetermined period based on the period set in the power usage target value. That is, when the power usage target value is set, the power control device 20 divides the set power usage target value into unit power use target values for a predetermined period in step S53. Subsequently, in step S55, the power control device 20 divides the threshold value into unit threshold values for a predetermined period. In step S57, the power control unit 20 may monitor whether or not the power usage of each of the loads 10 exceeds a unit threshold value. In this case, the predetermined period is set to be shorter than the period set in the power usage target value, and may be set to one of, for example, one week, week, or month.

In this embodiment, the step S55 is performed after the step S53 is performed. However, the step S55 may be performed first. Steps S53 and S55 may be performed between steps S51 and S57.

If the monitoring result in step S59 does not exceed the threshold value, the power control device 20 determines in step S67 whether or not the period of the set power use target value has been reached. The step S67 will be described later.

If the monitoring result in step S59 exceeds the threshold value, the power control device 20 can control the power usage for the controlled object load 11 according to the user preference in step S61. For example, the power control device 20 can stop the power supply to the control target load 11 with reference to the user preference. That is, when the importance of the controlled object load 11 is included in the user preference, the power control device 20 can stop the power supply from the order of importance of the controlled object load 11.

Next, in step S63, the power control unit 20 can output an alarm or warning message through the output unit 27. [ Accordingly, the user can recognize that the power usage of the loads 10 is close to the set power consumption target set through the alarm or warning message output through the output unit 27.

At this time, although the example of performing the step S63 after the step S61 is described in this embodiment, the step S63 may be performed first.

Next, in step S65, the power control device 20 determines whether or not a request for changing the set power use target value is input. That is, the power control device 20 inquires whether or not the set power usage target has been changed, and determines whether or not a change request is input from the user for the inquiry.

If it is determined in step S65 that the change request is input, the power control device 20 performs the process from step S51 to set the power usage target value again. The user can change the period in the setting menu of the power usage target value, and change the power usage cost or the power consumption amount. The power control device 20 can change other items according to the items to be changed based on the predetermined power usage target value. Alternatively, the power control device 20 can reset the power consumption cost or the power consumption amount for each new period after initializing the previously set power consumption target value.

If it is determined in step S65 that no change request has been input, the power control apparatus 20 determines in step S67 whether or not the period of the set power use target value has been reached. Further, even if the monitoring result of step S59 does not exceed the threshold value as described above, the power control device 20 performs step S67.

If the determination result in step S67 is not satisfied, the power control device 20 performs the process from step S59 again.

If the determination result in step S67 is reached, the power control device 20 matches and stores the set power usage target value and the inputted user preference in step S69. The power control device 20 may provide the matched and stored information as reference data when the user sets the power usage target value, or may present the power usage target value to the user based on the statistics.

It should be noted that the embodiments disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Load
11: Load to be controlled
20: Power control device
21: Interface section
23:
25:
27: Output section
29:
100: Power control system

Claims (23)

Setting a power usage target value of the loads based on a power use cost or a power usage amount for each period;
The power control apparatus comprising: receiving a user preference including a control target load among the loads;
The power control device monitoring whether the power usage of the loads exceeds a threshold set based on the power usage target value;
If the monitoring result exceeds a threshold value, the power control device controls power usage with respect to the control target load according to the user preference;
And the power of the load. delete 2. The method according to claim 1, wherein in the setting step,
Wherein the power control apparatus changes the power consumption cost or the power consumption according to the changed period when the period is changed while the power usage target value is set. 2. The method according to claim 1, wherein in the setting step,
Wherein the power control unit maintains a power consumption cost or a power consumption amount set at a predetermined power usage target value even if the period is changed while the power usage target value is set. 2. The method according to claim 1, wherein in the setting step,
Wherein the power control unit changes the period according to the changed power usage cost or the power usage amount at a predetermined power usage target value when the power usage cost or the power usage amount is changed while the power usage target value is set. / RTI > 2. The method according to claim 1, wherein in the setting step,
Wherein the power control unit maintains a period set in a predetermined power usage target value when the power usage cost or the power usage amount is changed while the power usage target value is set. 2. The method according to claim 1, wherein in the setting step,
Wherein the power control device sets the power usage target value according to a user's selection signal or sets a default value based on statistics on a previously set power usage target value. 2. The method of claim 1, wherein in the input step,
Wherein the user preference further includes a control range of the control object load, a control time of the control object load, a weather condition, an unexpected event, or a user schedule. 2. The method of claim 1, wherein in the monitoring step,
Wherein the threshold value is set to be lower than the power usage target value. 2. The method of claim 1, further comprising the step of monitoring,
The power control apparatus further comprises dividing the power usage target value by a unit power use target value for a predetermined period and dividing the threshold value into unit threshold values by the predetermined period,
Wherein, in the monitoring, the power control unit monitors whether or not the power usage amount of the loads for the predetermined period exceeds the unit threshold value. 11. The method of claim 10, wherein in the dividing step,
Wherein the predetermined period is shorter than a period set for the power usage target value, and is one of a day, a week, and a month. 2. The method of claim 1,
And the power control device outputs an alarm or a warning message. 13. The method of claim 12, further comprising: after the step of outputting an alarm or warning message in the controlling step,
The power control device inquiring whether to change the set power usage target value;
If the request for changing the power usage target value is input in the inquiring step, the power control device performs the step again from the setting step;
Further comprising the steps of: The method according to claim 1,
The user preference includes the importance of the load to be controlled,
In the controlling step,
Wherein the power control device stops power supply from a lower priority order among the control target loads. The method according to claim 1,
If the monitoring result threshold value is not exceeded, the power control device maintains the monitoring step;
Determining whether the monitoring time has reached a time period set in the power usage target value;
Wherein the power control device matches the set power usage target value with the input user preference when the power margin reaches a set time period as a result of the determination;
Further comprising the steps of: 16. The method of claim 15,
If it is determined that the predetermined period has not been reached, the power control apparatus performs the steps from the monitoring step again;
Further comprising the steps of: An interface unit connected to the loads;
A storage unit for storing a power usage target value of the initialized loads and a user preference including a control target load among the loads;
Wherein the power usage target value is set based on a power usage cost or a power usage amount for each period, monitoring whether or not a power usage amount of the loads exceeds a threshold value set based on the power usage target value, A control unit for controlling power use for the control target load through the interface unit according to the user preference;
And a power controller for controlling the power of the load. 18. The method of claim 17,
And an input unit for receiving a user's selection signal,
The control unit receives and sets the power usage target value of the loads through the input unit, stores it in the storage unit, receives the user preference including the control object load among the loads through the input unit, and stores the received user preference in the storage unit Characterized in that the power control device delete 19. The apparatus of claim 18,
Dividing the power use target value by a unit power use target value for a predetermined period, dividing the threshold value into unit threshold values by the predetermined period,
Wherein the monitoring unit monitors whether the power usage of the load exceeds the unit threshold value during the monitoring period. 18. The method of claim 17,
The user preference includes the importance of the load to be controlled,
Wherein when the monitoring result exceeds a threshold value, the control unit cuts off the power supply from the control target load in a descending order of importance. 19. The method of claim 18,
And an output unit for outputting an alarm or warning message,
The control unit outputs an alarm or a warning message through the output unit when the monitored result exceeds the threshold, and inquires through the output unit whether the set power use target value is changed after outputting the alarm or warning message And a power use target value is reset when a request for changing the power usage target value is inputted through the input unit. 19. The apparatus of claim 18,
Wherein the control unit maintains the monitoring state when the monitoring result does not exceed the threshold and determines whether or not the monitoring time reaches a time period set in the power usage target value, And the stored power usage target value and the input user preference are matched and stored in the storage unit.

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