KR20180108082A - Method for power controlling of hems using power price and system comprising the same - Google Patents

Abstract

The present invention relates to a method for controlling power of an HEMS using power costs, and a system including the same. The method for controlling power of an HEMS comprises the steps of: (a) receiving power costs for power supplied from a power supplier from the HEMS; (b) transmitting the power costs to at least one smart home appliance connected to the HEMS from the HEMS and receiving usage amount schedule information generated on the basis of the power costs from the at least one smart home appliance; (c) determining whether the sum of the received usage amount schedule information is smaller than a preset power peak value; (d) adjusting the size of the power costs when the sum of the usage amount schedule information is greater than the preset power peak value; (e) transmitting the adjusted power costs to the at least one smart home appliance from the HEMS and re-receiving the usage amount schedule information generated on the basis of the adjusted power costs from the at least one smart home appliance; and (f) determining whether the sum of the re-received usage amount schedule information is smaller than the preset power peak value.

Description

TECHNICAL FIELD [0001] The present invention relates to a power control method of a HEMS using a power price, and a system including the power control method.

The present invention relates to a power control method of a HEMS using a power price and a system including the same. In particular, the present invention relates to a power control method of a HEMS capable of controlling the usage amount of one or more smart appliances in a single signal of a power price and a system including the same.

The present invention has been accomplished under the support of the National Research and Development Project (Supporting Administrative Agency: Ministry of Commerce, Industry and Energy, Project Assigned Number: 20151210200080; Project Name: IoT based campus micro grid construction and demonstration).

Electrical energy, which is widely used in various industrial fields today, is produced and transported through a system called electric power system. Electrical energy produced by various types of power plants is transferred to distribution facilities through high-voltage transmission facilities and substations, and distribution facilities supply electricity to the customers. The customer receives electrical energy from the distribution facility through the distribution line and uses it to drive a variety of electrical devices.

Recently, as balancing the supply and demand of electric power systems becomes a critical task in order to make reasonable use of limited energy resources, research on Demand Response (DR), an advanced form of demand management, is increasing.

Demand response can be defined as a change in the form of power consumption with changes in electricity rates. In other words, it means adjusting the power consumption according to the electricity rate to reduce the electricity rate. By doing so, demand response techniques can play an important role in reducing power consumption during peak hours. For example, reducing the power consumption of a household appliance by taking the inconvenience in an area where electricity charges are high can be an example of a demand response.

The prior art related to this demand reaction is to prevent the use of home appliances when the electricity usage fee is expensive due to the change of the real time electricity charge, to control the use of home appliances when the electricity usage fee is low, And a method of controlling the operation of home appliances by dividing time and less time. In the case of the related art, the operation of the consumer electronic appliance can be automatically controlled during the demand response event time considering the time zone and the reduction power amount in the demand response event in the HEMS (Home Energy Management System).

However, since the existing HEMS must consider both the occurrence time and the weight of the event, the control method becomes complicated as the number of appliances increases, and the control signal for each home appliance is generated according to each weight, . In addition, existing HEMS has the inconvenience that the user has to manually set the scheduling and weighting for a plurality of home appliances in the HEMS.

Recently, in the case of Smart Appliance, the device can schedule the operation amount by itself considering the power price and the utility of the consumer, so that it is possible to automatically perform scheduling within a range that does not impair consumer utility for each smart appliance.

However, since each smart home appliance individually schedules its own operation amount, when a plurality of smart home appliances are used in the home, even if the total electric power used in a plurality of smart home appliances exceeds the power peak target value, There was no problem.

The present invention relates to a HEMS for controlling a plurality of smart appliances that schedule their usage amount by time in response to a power price, the HEMS comprising: a power control unit for controlling a plurality of smart appliance usage schedules in a single signal of a power price, And a system including the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

In order to solve such a problem, the HEMS power control method of the present invention comprises the steps of: (a) receiving a power price for power supplied from a power supplier at a HEMS; (b) And receiving usage schedule information generated based on the power price from the at least one smart home appliance, (c) receiving the usage schedule information from the at least one smart home appliance, (D) adjusting the magnitude of the power price if the sum of the usage schedule information is greater than a predetermined power peak value; (e) adjusting the adjusted power price in the HEMS; To the at least one smart home appliance, based on the adjusted power price from the at least one smart home appliance And (f) determining whether the total sum of the usage schedule information re-received is less than a preset power peak value.

The method may further include repeating the steps (d) to (f) until the total sum of the received usage schedule information becomes smaller than the preset power peak value.

Also, in the step (d), adjusting the magnitude of the power price may use a power price including increasing the magnitude of the power price.

Also, in the step (d), adjusting the size of the power price may include increasing the size of the power price.

In addition, in the steps (b) and (e), the smart home appliance may generate an operation schedule so as not to exceed a predetermined power amount based on the power price received from the HEMS, Usage schedule information may be generated and transmitted to the HEMS.

In order to solve the above-mentioned problem, the HEMS system using the electric power price of the present invention includes a HEMS system including a HEMS connected with at least one smart appliance, the HEMS system comprising: receiving a power price from a power supplier; And a control unit for receiving the usage schedule information calculated based on the power price from the at least one smart home appliance and determining whether the sum of the usage schedule information received is smaller than a predetermined power peak value And a control unit for adjusting the magnitude of the power price based on the determined result, and an operation schedule generation unit for generating an operation schedule so as not to exceed a predetermined power amount based on the power price received from the HEMS , Generates the usage schedule information based on the operation schedule, Comprising at least one smart appliances to deliver the HEMS, the HEMS is, the sum of the usage schedule information received from the at least one smart appliances, and adjusts the power value to be smaller than the peak value of power set in advance.

Further, the communication unit transmits the adjusted power price to the at least one smart home appliance, and re-receives the usage schedule information regenerated based on the power price from the at least one smart home appliance, It is possible to determine again whether or not the total sum of the usage schedule information re-received is smaller than the predetermined power peak value.

The control unit may repeat the power price until the total sum of the received usage schedule information becomes smaller than the preset power peak value, when the sum of the usage schedule information re-received is larger than the preset power peak value Can be modified.

In addition, the controller may adjust the power price to increase the size of the power price.

Also, the smart home appliance may adjust the usage schedule information so that the operating time of the smart home appliance is reduced when the received power price increases in size.

According to the present invention as described above, the HEMS power control method and system of the present invention can simplify the control method of the HEMS system by controlling the plurality of smart appliances in the home with a single signal of the power price. Accordingly, the present invention can simplify the operation and control signals of the HEMS, and minimize errors occurring in communication.

In addition, the HEMS power control method and system of the present invention can avoid a penalty for a peak imposed by a utility company by limiting the power peak value consumed by a plurality of smart appliances in a home.

In addition, the present invention prevents a situation in which a user has to pay an unexpected power charge, and can allow a user to easily predict a power charge. In addition, the present invention can automatically improve the convenience of the user by managing the operation schedule of the smart home appliance so as not to exceed the electricity rate set by the user, and it is possible to save power unnecessarily wasted in the unused home appliance And the power management efficiency can be improved.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a block diagram schematically illustrating a conventional HEMS system.
2 is a block diagram showing the structure of the HEMS of FIG.
3 is a flowchart for explaining the operation of the HEMS according to the prior art.
4 is a block diagram illustrating a HEMS system that utilizes power prices in accordance with some embodiments of the present invention.
5 is a block diagram showing the structure of the HEMS of FIG.
6 is a flowchart illustrating a power control method of a HEMS using a power price according to some embodiments of the present invention.
7 is a flowchart illustrating a power control method of a HEMS using a power price according to an embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

1 is a block diagram schematically illustrating a conventional HEMS system.

1, a conventional home energy management system (HEMS) 20 includes an energy management system (EMS), an energy service provider (Energy Service Provider) connected via a wired / wireless network, ESP) such as an operation center receives event information including information on occurrence time of a demand response event.

The HEMS 20 transmits a control signal related to the operation to the household appliances 10-1, 10-2, ... 10-N of the customer in consideration of the occurrence time of the demand reaction event, It is possible to automatically manage the power consumption of the home appliances 10-1, 10-2, ... 10-N.

Here, the household appliances 10-1, 10-2, ..., 10-N of the consumer generally refer to a device that performs a desired function by using electric power flowing through a power line. The household appliances include a refrigerator, , An iron, an air conditioner, a computer, a television, and the like.

When the home appliances 10-1, 10-2, ... 10-N receive the upper control signal from the HEMS 20 via the wired / wireless network, the home appliances 10-1, 10-2, ... 10- The operation can be controlled.

2 is a block diagram showing the structure of the HEMS of FIG.

Referring to FIG. 2, the HEMS 20 of the present invention includes an event information receiving unit 21, a weight setting unit 22, a control signal generating unit 23, and a control signal transmitting unit 24. The event information receiving unit 21 includes information on the time of occurrence of a demand response event from the outside such as an energy management system (EMS) connected to a wired / wireless network and an operation center of an energy service provider (ESP) Lt; / RTI >

Here, the event occurrence time information may be predetermined time range information requiring a reduction in power consumption due to an insufficient electric power supply or an increase in electric power demand.

The weight setting unit 22 assigns weights to the appliances in consideration of the occurrence time of the event. Here, the weight is a value given to the individual home appliances in order to determine a priority for the operation of the home appliances during the event occurrence time, and the weight may be rank information about the appliance operation assigned for each predetermined time period.

Meanwhile, the weight setting unit 22 automatically adjusts the power consumption of the individual home appliances in consideration of the convenience of the user, so as to determine the priorities of the home appliances during the demand reaction event occurrence time The weight corresponding to the occurrence time of the event can be given to the corresponding home appliance according to the weight information of the individual home appliances for each predetermined time period. At this time, the weight information of the individual home appliances according to the predetermined time period can be inputted and changed according to the user's selection.

On the other hand, the HEMS 20 can give a weight considering further information on the power reduction amount. Specifically, the event information includes information on the amount of power reduction, and the weight setting unit 22 may assign a weight to each appliance in consideration of the information on the power reduction amount.

Herein, the information on the power reduction amount comprehensively refers to information on the amount of power to be reduced during the demand reaction event occurrence time, and the information on the power reduction amount is a percentage of the current power consumption (for example, %) Or an amount of power (for example, 10 kWh).

The HEMS 20 can preferentially select the electric power use control object from the household electric appliances having high power consumption as the electric power to be reduced even when the demand reaction event occurs in the same time zone.

Meanwhile, the weight setting unit 22 may automatically adjust the use of individual electric power in consideration of the convenience of the user, and may determine a priority order of the appliances during the demand reaction event occurrence time in a simple manner, And a weight corresponding to the event occurrence time and the power reduction amount information according to the weight information of the individual home appliances according to the amount of power.

At this time, the weight information of the individual household appliances according to the predetermined time period and the power amount can be inputted and changed according to the user's selection.

The control signal generator 23 generates a control signal related to the operation of each appliance according to the weight value. The control signal is a signal for controlling the operation of an individual home appliance during a demand reaction event time, and the control signal may be a command signal for controlling the on-off operation of the household appliance. On the other hand, the control signal may include information on a time when operation is allowed so that the individual home appliances can control their own operation. Thereby, the home appliance can implement the scheduling for the operation automatically / actively within the time range in which the operation is permitted.

The control signal transmitting unit 24 transmits the control signal to the corresponding home appliances. Specifically, the control signal transmitting unit 24 can transmit the control signal to the home appliances through wired / wireless communication. At this time, the control signal transmitting unit 24 transmits the control signal to the home appliance before the predetermined time before the demand reaction event occurs so that the home appliance can be properly controlled through the control signal during the demand reaction event occurrence time Lt; / RTI >

3 is a flowchart for explaining the operation of the HEMS according to the prior art.

Referring to FIG. 3, an operation method according to a demand response performed by the HEMS 20 receives event information including a demand response event occurrence time information from an external event through an event information reception unit (S10).

Then, the weight setting unit assigns weights to the appliances in consideration of the occurrence time of the event (S12). At this time, the weight setting unit automatically adjusts the use of electric power of the individual home appliances by taking into account the convenience of the user as much as possible. However, in order to determine the priority of the home appliances during the demand reaction event occurrence time, A weight corresponding to the occurrence time of the event can be given to the corresponding home appliance according to the weight information of the individual home appliance.

Meanwhile, the event information may include information on the amount of power reduction, and the weight setting unit may assign a weight for each appliance by considering information on the power reduction amount.

At this time, the weight setting unit automatically adjusts the use of individual electric power in consideration of the convenience of the user, so that the priorities of the appliances during operation of the demand reaction event occurrence time can be determined in a simple manner, A weight corresponding to the event occurrence time and the power reduction amount information may be given to the corresponding home appliance according to the weight information of the home appliance.

Then, the control signal generator generates a control signal related to the operation of each appliance according to the weight value (S14).

Then, the control signal transmitting unit transmits the control signal to the corresponding home appliance (S16). At this time, the control signal transmission unit may transmit the control signal to the corresponding home appliances a predetermined time before the demand reaction event occurrence time so as to appropriately control the operation of the home appliances during the demand reaction event occurrence time.

However, since the existing HEMS 20 needs to consider both the event occurrence time and the weight in the demand response event, the control method becomes more complicated as the number of home appliances controlled by the HEMS 20 increases, There is a problem that the processing load of the HEMS 20 increases and the load of the system increases.

In addition, the conventional HEMS 20 has a disadvantage that the user has to set the scheduling and the weight for a plurality of home appliances directly in the HEMS 20. [

Hereinafter, a power control method of a HEMS using a power price according to some embodiments of the present invention and a system including the same will be described with reference to FIGS.

4 is a block diagram illustrating a HEMS system that utilizes power prices in accordance with some embodiments of the present invention.

Referring to FIG. 4, a HEMS system utilizing a power price according to some embodiments of the present invention includes a HEMS 200, and at least one smart appliance 310, 320 ... 350 (Smart Appliance). That is, the HEMS system may include a plurality of smart appliances 310, 320 ... 350. With the emergence of smart appliances (310, 320 ... 350) that schedule the usage of home appliances in consideration of the price of electricity and the utility of consumers, scheduling that does not hurt consumer utility by devices has become possible. In this case, however, it is necessary to consider how the HEMS 200 can control the plurality of smart appliances 310, 320, ..., 350 to manage peak target values.

The HEMS 200 may receive power price information from the utility 100.

The power company 100 can provide power to the HEMS 200 installed in the home in conjunction with the grid power. The power company 100 may also provide the HEMS 200 with power price information for the provided power.

At this time, electricity provided by the electric power company 100 may be charged in different time periods and seasonally. For example, electricity provided by KEPCO can be charged at different rates based on the power consumption of users divided into light load periods, heavy load periods, and peak load periods. At this time, the electric charge can be divided into the maximum load section, the heavy load section, and the light load section, and the electric charge may be lowered in the order of the maximum load section, the heavy load section, and the light load section.

For example, in the afternoon time zone (for example, 1200 hours to 1500 hours) in which users need to adjust the supply of electricity due to high power consumption, the highest electricity rate may be assigned to the maximum load period . Also, in the case of a night time zone (for example, 0000 to 0400 hours) in which the supply and demand for the electric power is not needed because the electric power consumption is relatively low, the lowest electricity rate may be assigned as the light load period. However, this is merely one example, and the present invention is not limited thereto. Here, the electricity rate has substantially the same meaning as the electricity price.

The power price information may include information about the real time power price and the real time power peak value by time of day. The information on the power peak value is a guideline for the amount of power set by the power company 100 because it is necessary to control the supply and demand of the power due to a large amount of power consumption by the users.

That is, the utility 100 sets a peak target value and operates a billing system in which power consumption is adjusted by imposing a high charge when the peak target value is exceeded in each household.

The HEMS 200 receives from the power company 100 the power price and power peak value by time slot included in the power price information and stores the plurality of smart appliances 310, 320, ..., 350 connected to the HEMS 200 so as not to exceed the power peak To control the operation of the plurality of smart appliances 310, 320, ... 350.

Hereinafter, a smart appliance 310 among a plurality of smart appliances 310, 320, ... 350 will be described as an example.

The smart home appliance 310 has scheduling capability for its own received power price. Specifically, the smart home appliance 310 receives the power price from the HEMS 200, and automatically sets the operation schedule of the smart home appliance 310 using the received power price. For example, the smart home appliance 310 sets an operation schedule so that the operation time is reduced in a time period when the power price is high and the operation time is increased in a time period when the power price is low.

Accordingly, the smart home appliance 310 can generate and operate an operation schedule in consideration of the price of the power itself, and can generate and operate an operation schedule so that electricity charges do not occur over a predetermined amount.

The operation of the smart home appliance 310 may be performed in the same manner as the other plurality of smart home appliances 320 ... 350.

The plurality of smart appliances 310, 320 ... 350 and the HEMS 200 can communicate by wire or wireless. The communication protocol used between the plurality of smart appliances 310, 320, ... 350 and the HEMS 200 may be, for example, Code Division Multiple Access (CDMA) communication, Wideband Code Division Multiple Access (WCDMA) Wireless communication. In this case, the wireless communication network includes a wireless LAN (WLAN), a Wi-Fi, a wireless broadband (Wibro), a WiMAX (World Interoperability for WIMAX), a High Speed Downlink Packet Access (HSDPA) Long Term Evolution (LTE), IEEE 802.16, and Wireless Mobile Broadband Service (WMBS).

The HEMS 200 can control the sum of the amounts of power used by the plurality of smart appliances 310, 320, ... 350 to not exceed the power peak value by using the operation method of the plurality of smart appliances 310, 320 ... 350 have.

Specifically, the HEMS 200 may reduce the total amount of power of the smart appliances 310, 320,... 350 by adjusting the prices of the electric power to be provided to the plurality of smart appliances 310, 320 ... 350.

For example, the HEMS 200 may provide an initial power price to a plurality of smart appliances 310, 320 ... 350. Then, the plurality of smart appliances 310, 320 ... 350 may generate their own operation schedules based on the received initial power prices. The HEMS 200 can receive usage schedule information for each operation schedule from a plurality of smart appliances 310, 320, ... 350.

Then, the HEMS 200 compares the sum of the received usage schedule information with the power peak value. If the sum of the received usage schedule information is larger than the power peak value, the HEMS 200 generates a corrected power price modified with the initial power price, and retransmits it to the plurality of smart appliances 310, 320 ... 350. At this time, the corrected power price may be larger than the initial power price.

Subsequently, the plurality of smart appliances 310, 320 ... 350 generate an operation schedule based on a correction power price that is larger than the initial power price, rewrite the usage schedule information for the operation schedule, and send it to the HEMS 200 . The sum of the usage schedule information generated based on the corrected power price may be smaller than the sum of the usage schedule information generated based on the initial power price.

As a result, the HEMS 200 can adjust the power consumption so that the sum of the usage schedule information becomes smaller than the power peak value by adjusting the power price. At this time, the detailed operation schedules of the plurality of smart appliances 310, 320 ... 350 are determined by the respective plurality of smart appliances 310, 320 ... 350. The HEMS 200 can adjust the total power consumption by providing only a guide for the total power consumption to each of the plurality of smart appliances 310, 320,... 350 using a power price.

Thus, the HEMS system of the present invention can simplify the control method of the HEMS system by controlling a plurality of smart appliances 310, 320 ... 350 in the home in the HEMS 200 with a single signal of power price. That is, the present invention can simplify the operation and control signals of the HEMS 200 and minimize errors occurring in communication between the HEMS 200 and the plurality of smart appliances 310, 320,... 350.

5 is a block diagram showing the structure of the HEMS of FIG.

5, the HEMS 200 according to some embodiments of the present invention includes a communication unit 210, a control unit 220, a memory unit 230, an interface unit 240, a display unit 250, 260).

The communication unit 210 exchanges data between a plurality of smart appliances 310, 320 ... 350 and the HEMS 200 and between the electric power company 100 and the HEMS 200.

Specifically, the communication unit 210 receives the electric power price information from the electric power company 100, and transmits the received electric power price information to the controller 220. The communication unit 210 receives usage schedule information from a plurality of smart appliances 310, 320,... 350 and transmits the received usage schedule information to the control unit 220.

At this time, the communication protocol used in the communication unit 210 includes, for example, Code Division Multiple Access (CDMA) communication, Wideband Code Division Multiple Access (WCDMA) communication, or broadband wireless communication. In this case, the wireless communication network includes a wireless LAN (WLAN), a Wi-Fi, a wireless broadband (Wibro), a WiMAX (World Interoperability for WIMAX), a High Speed Downlink Packet Access (HSDPA) Long Term Evolution (LTE), IEEE 802.16, and Wireless Mobile Broadband Service (WMBS).

In addition, the short-range wireless communication network includes Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee and Z- . However, the present invention is not limited thereto.

The controller 220 collects usage schedule information received from at least one smart appliance 310, 320,... 350 and calculates a sum of the usage schedule information.

Then, the control unit 220 determines whether the sum of the usage schedule information is smaller than a predetermined power peak value. If the sum of the usage schedule information is larger than a preset power peak value, the controller 220 adjusts the size of the electric power price to be transmitted to the plurality of smart appliances 310, 320,.

For example, when the total sum of the usage schedule information of the plurality of smart appliances 310, 320, ... 350 is greater than a predetermined power peak value, the control unit 220 determines a power price to be transmitted to the plurality of smart appliances 310, 320 ... 350 Can be increased. In this case, since the plurality of smart appliances 310, 320 ... 350 create an operation schedule based on the increased power price, the sum of the usage schedule information retransmitted from the plurality of smart appliances 310, 320 ... 350 Can be reduced.

Next, the control unit 220 compares whether the sum of the usage schedule information re-received from the plurality of smart appliances 310, 320, ... 350 is smaller than the power peak value. If the sum of the usage schedule information is larger than the preset power peak value , It is possible to further increase the price of the electric power to be delivered to the plurality of smart appliances 310, 320 ... 350. The control unit 220 can repeat this operation until the sum of the usage schedule information becomes smaller than the power peak value and satisfies the power peak value. Accordingly, the HEMS power control method of the present invention adjusts the operation schedules of the plurality of smart appliances 310, 320 ... 350 by adjusting only the price of the electric power, and the plurality of smart appliances 310, 320 ... 350 Can be controlled so as to satisfy the requirements.

The memory unit 230 stores the electric power price information received from the electric power company 100 and modifies the initial electric power price received from the electric power company 100 by the controller 220 to generate a plurality of smart electric appliances 310, , The total amount of the usage schedule information received from the plurality of smart appliances 310, 320, ... 350, and the usage schedule information.

For example, the memory unit 230 may include one or more volatile memory devices and / or electrically erasable programmable ROM (EEPROM) such as Double Data Rate Static DRAM (DDR SDRAM), Single Data Rate SDRAM (SDR SDRAM) volatile memory device, such as a memory. However, the present invention is not limited thereto.

The interface unit 240 may be used to receive input from a user or to exchange data through a wireless data network. The interface unit 240 may include a touch screen, a keyboard, a mouse, an antenna, and / or a wireless transceiver. The interface unit 240 may be connected to an external host through a USB interface such as a universal serial bus (USB), a small computer system interface (SCSI), a PCI express, an ATA, a PATA (Parallel ATA), a SATA (Serial ATA) Lt; / RTI > However, this is only an example and the present invention is not limited thereto.

The display unit 250 may display information on the operating state of the HEMS 200 and the operating states of the plurality of smart appliances 310, 320 ... 350. In addition, the display unit 250 can display information received from the electric power company 100 and a plurality of smart appliances 310, 320,... 350.

For example, the display unit 250 may display the sum of the current power usage, the power peak value, the operation schedule of the plurality of smart appliances 310, 320 ... 350, the sum of the current usage schedule information and the current usage schedule information, Comparison information, power usage statistics, and real-time power charges, etc., to the user. However, this is merely one example, and the present invention is not limited thereto.

The bus 260 may be used for data communication between the communication unit 210, the control unit 220, the memory unit 230, the interface unit 240, and the display unit 250. In some embodiments of the invention, such a bus 260 may have a multi-layer structure. For example, the bus 1030 may be a multi-layer Advanced High-performance Bus (AHB) or a multi-layer Advanced Extensible Interface (AXI). However, the present invention is not limited thereto.

6 is a flowchart illustrating a power control method of a HEMS using a power price according to some embodiments of the present invention.

Referring to FIG. 6, a power control method of a HEMS using a power price according to some embodiments of the present invention first receives a power price for power supplied from a power company 100, which is a power supplier, by the HEMS 200 (S110).

The HEMS 200 then transmits the power price to at least one smart home appliance 310, 320 ... 350 connected to the HEMS 200 (S120)

Next, the HEMS 200 receives the usage schedule information generated based on the power price from at least one smart home appliance 310, 320 ... 350 (S130).

Then, the HEMS 200 determines whether the sum of the usage schedule information received from the smart appliances 310, 320, ... 350 is smaller than a predetermined power peak value (S140).

Then, if the sum of the usage schedule information is larger than a predetermined power peak value, the size of the power price is adjusted (S150).

Then, steps S120 to S150 are repeated until the sum of usage schedule information becomes smaller than a predetermined power peak value.

Accordingly, the HEMS power control method using the electric power price of the present invention can control all home smart appliances with a single signal of power price, so that the configuration is simple and the power peak value consumed by home smart appliances is limited, Thereby avoiding the penalty for the imposed peak. Therefore, the user can predict the electric charge to be imposed this month, reduce the amount of electric power to be used, and increase the power use efficiency in the home.

In addition, when the present invention is used in many households, the electric power company 100 can adjust the power peak value so that the power supply and demand can be stabilized.

7 is a flowchart illustrating a power control method of a HEMS using a power price according to an embodiment of the present invention. For the sake of convenience of description, the same elements as those of the above-described embodiment will be described below with the exception of duplicate descriptions.

Referring to FIG. 7, in the HEMS power control method using a power price according to an embodiment of the present invention, the HEMS 200 receives power price information from the power company 100 (S210). At this time, the power price information may include a real time power price provided to the HEMS 200.

Next, the HEMS 200 delivers the initial power price received from the utility 100 to a plurality of smart appliances 310, 320,... 350 connected to the HEMS 200 (S221, S223, S225). At this time, the HEMS 200 delivers the same initial power price to the plurality of smart appliances 310, 320 ... 350.

Next, each of the smart appliances 310, 320 ... 350 generates an operation schedule based on the received initial power price so as not to exceed a predetermined power amount, generates usage schedule information based on the operation schedule, 200 (S231, S233, S235).

Next, the HEMS 200 calculates the sum of the usage schedule information received from the plurality of smart appliances 310, 320 ... 350, compares the sum of the usage schedule information with the power peak value, It is determined whether the target is satisfied (S240).

If the sum of the usage schedule information received from the smart appliances 310, 320,... 350 is greater than the predetermined power peak value, the HEMS 200 generates a new price signal (S250). That is, the HEMS 200 generates an adjusted power price adjusted at the initial power price. At this time, the corrected power price may be larger than the original power price.

Then, the HEMS 200 transmits the adjusted quartz price to the plurality of smart appliances 310, 320,... 350 connected to the HEMS 200 (S261, S263, S265). At this time, the HEMS 200 delivers the same corrected power price to the plurality of smart appliances 310, 320, ..., 350.

Subsequently, each of the smart appliances 310, 320 ... 350 regenerates the operation schedule so as not to exceed the predetermined amount of power based on the corrected power price re-received, regenerates the usage schedule information based on the regenerated operation schedule To the HEMS 200 (S271, S273, S275).

Next, the HEMS 200 calculates the sum of the usage schedule information re-received from the plurality of smart appliances 310, 320 ... 350, compares the sum of the usage schedule information with the power peak value, It is determined whether the peak target is satisfied (S280).

The HEMS 200 then generates a new price signal if the sum of usage schedule information re-received from the smart appliances 310, 320 ... 350 does not satisfy the predetermined power peak value (S290). That is, the HEMS 200 generates a new revised power price adjusted at the revised power price. At this time, the new corrected power price may be larger than the existing corrected power price.

Then, the HEMS 200 repeatedly performs the operations belonging to step S320 until the sum of the usage schedule information received from the smart appliances 310, 320, ... 350 satisfies a preset power peak value.

Accordingly, the HEMS power control method and system of the present invention can simplify the control operation of the HEMS system by controlling the plurality of smart appliances 310, 320 ... 350 in the home with a single signal of the power price, . Accordingly, the present invention can simplify the operation and control signals of the HEMS 200, and minimize errors occurring in communication.

In addition, the HEMS power control method and system of the present invention can avoid a penalty for a peak imposed by a utility company by limiting the power peak value consumed by a plurality of smart appliances in a home.

In addition, the present invention prevents a situation in which a user has to pay an unexpected power charge, and can allow a user to easily predict a power charge. In addition, the present invention can automatically improve the convenience of the user by managing the operation schedule of the smart home appliance so as not to exceed the electricity rate set by the user, and it is possible to save power unnecessarily wasted in the unused home appliance And the power management efficiency can be improved.

The present invention is not limited to the embodiment in which the option of peaking to the real-time power plan is applied to the environment of the HEMS power control method using the electric power price.

Specifically, the present invention is based on a utility plan (e.g., a Peak Pricing (CPP), a Critical Peak Pricing (CPC), a Time-of-Publication (TOC) Use). Therefore, the present invention is not limited to the above-described embodiments, and can be applied to a range of possible modifications and variations as long as those skilled in the art can extend the above description.

For reference, the power control method of the HEMS of the present invention described above can be implemented by various means. For example, the communication data modeling method of the present invention can be implemented by hardware, firmware, software, or a combination thereof.

In the case of hardware implementation, the HEMS power control method of the present invention may be implemented in one or more ASICs, DSPs, DSPs, Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of firmware or software implementation, the HEMS power control method of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

100: Power company 200: HEMS
210: communication unit 220:
230: memory unit 240: interface unit
250: display unit 310, 320 ... 350: Smart Home Appliances

Claims (10)

(a) receiving at a HEMS a power price for power received from a power supplier;
(b) delivering the power price in the HEMS to at least one smart appliance connected to the HEMS, and receiving usage schedule information generated based on the power price from the at least one smart appliance;
(c) determining whether the sum of the usage schedule information received is smaller than a predetermined power peak value;
(d) adjusting the size of the power price if the sum of the usage schedule information is larger than a predetermined power peak value;
(e) delivering the adjusted power price to the at least one smart home appliance at the HEMS, and re-receiving usage schedule information generated based on the adjusted power price from the at least one smart home appliance; And
(f) determining whether the sum of the usage schedule information re-received is smaller than a predetermined power peak value
Method of power control of HEMS using power price.
The method according to claim 1,
And repeating the steps (d) to (f) until the total sum of the received usage schedule information becomes smaller than the preset power peak value.
The method according to claim 1,
In the step (d), adjusting the magnitude of the power price includes using the power price including increasing the magnitude of the power price.
The method of claim 3,
In the step (d), adjusting the magnitude of the power price includes using the power price including increasing the magnitude of the power price.
The method of claim 3,
In the steps (b) and (e), the smart home appliance generates an operation schedule based on the power price received from the HEMS so as not to exceed a preset power amount, and, based on the operation schedule, Information to be transmitted to the HEMS
Method of power control of HEMS using power price.
A HEMS system comprising a HEMS coupled to at least one smart home appliance,
A communication unit for receiving a power price from a power supplier and delivering the power price to the at least one smart home appliance; a receiving unit for receiving usage schedule information calculated based on the power price from the at least one smart home appliance, And a controller for determining whether the sum of usage schedule information is smaller than a predetermined power peak value and adjusting the size of the power price based on the determined result; And
Generating at least one smart appliance that generates an operation schedule based on the power price received from the HEMS so as not to exceed a predetermined amount of power and transmits the usage schedule information to the HEMS based on the operation schedule However,
The HEMS adjusts the power price so that the sum of the usage schedule information received from the at least one smart home appliance is smaller than the predetermined power peak value
HEMS system using power prices.
The method according to claim 6,
Wherein the communication unit transmits the adjusted power price to the at least one smart home appliance and re-receives the usage schedule information regenerated based on the power price from the at least one smart home appliance,
Wherein the control unit uses a power price to determine again whether or not the sum of the usage schedule information re-received is less than a preset power peak value.
8. The method of claim 7,
Wherein the control unit repeatedly modifies the power price until the total sum of the received usage schedule information is greater than a predetermined power peak value until the sum of the usage schedule information received becomes smaller than a preset power peak value HEMS system using power prices.
9. The method of claim 8,
Wherein the controller uses the power price to adjust the power price so that the magnitude of the power price is increased.
The method according to claim 6,
Wherein the smart home appliance uses a power price to adjust the usage schedule information so that the operation time of the smart home appliance is reduced when the magnitude of the received power price increases.

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