KR20130073788A - Method and system for indentifying electric appliances - Google Patents

Abstract

PURPOSE: A method automatically identifying an electric power device and a system thereof are provided to reducing construction costs of a smart grid construction project. CONSTITUTION: An electric power device identification system comprises a watt hour meter (10) which measures the total amount of electricity used on a hourly basis; a smart meter (20) which receives the total amount of electricity used on a hourly basis in a consumer's house from the watt hour meter; an electricity consumption receiver (31) which receives the total amount of electricity used on a hourly basis in the consumer's house from the smart meter; an electricity consumption reading unit which reads the amount of electricity used on a hourly basis by at least one arbitrary electric power device from the total amount of electricity used on a hourly basis; a database (34) which stores the amount of electricity used hourly by multiple compared electric power devices; an control center (30) including an electric power device identification unit (36) which identifies the kind of the arbitrary electric power device by using the amount of electricity used on a hourly basis by the arbitrary electric power device and the amount of electricity used on a hourly basis by the multiple compared electric power devices. [Reference numerals] (10) Watt hour meter; (11) Electricity consumption measuring unit; (12) Measurement result transmitter; (20) Smart meter; (21) Meter transceiver unit; (22) Display unit; (23) Electric power device input unit; (30) Control center; (31) Electricity consumption receiver; (32) Electricity consumption storage; (33) Electric power device usage reader; (34) Database; (35) Prediction unit; (36) Electric power device identification unit; (37) Identification information transmitting unit

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for identifying a power device,

The present invention relates to a method and system for identifying a power device, and more particularly, to a method and system for identifying a type of power device used in a customer.

In order to efficiently manage energy, the concept of Smart Gird has been introduced. The Smart Grid is a system that integrates information technology into the existing unidirectional power grid, which has been in the stage of power generation, transmission, distribution and sales, It refers to an 'intelligent power grid' that optimizes energy efficiency by allowing consumers to exchange information in real time in both directions. The basic concept is that the entire power system works as one body efficiently by connecting the power plant, transmission and distribution facilities, and power consumers to information and communication networks and sharing information in both directions.

Smart Grid is actively applying ICT (Information & Communication Technology) technologies to the power infrastructure to more efficiently and efficiently manage and control the whole process from production to consumption of electricity with intelligent capability added to the power infrastructure In particular, by combining communication technology with the power grid, suppliers and consumers can exchange real-time power information in both directions, thereby inducing rational energy consumption through bidirectional power information exchange, providing high-quality energy and various additional services, Generation power grid that optimizes efficiency.

In this environment, developed countries such as the US and Europe have been implementing various IT-based power grid policies since early 2000, and Korea is also pursuing policies and strategies related to smart grid in the country.

In order to provide the home energy management service using such a smart grid, it is necessary to provide a smart tag for measuring the power consumption of a specific power device installed in the customer. Such a smart tag is provided in an outlet so as to measure the power consumption of the power supply connected to the outlet and transmit the measured power consumption to the smart meter.

Typically, one or more power appliances and outlets are used for the customer, and a smart tag should be provided for each power device or each outlet. As described above, when the smart tag is provided for each receptacle of the customer or each power device, the manufacturing cost and the installation cost of the smart tag are increased, and the construction cost of the smart grid business is significantly increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and system for identifying a power device that can reduce the construction cost of a smart grid business.

In order to achieve the above-described object, the present invention provides a wireless communication system including a watt-hour meter installed in a customer and measuring a total power consumption by a time slot, a smart meter receiving a total power consumption by a time slot of a customer from the watt hour meter, An electric power consumption measuring unit for reading electric power consumption by at least one of the at least one electric power unit in the total electric power consumption by the time period and a power consumption unit And an operation center including an electric power unit identification unit for identifying a type of an arbitrary electric power apparatus by using the electric power consumption by time of the electric power equipment and the electric power consumption by time of the comparison electric power equipment A system for identifying power devices is provided.

At this time, the power device usage reading unit calculates a time-based change amount in the total power usage amount per time period, subtracts the reference usage amount from the total power usage amount by time period between the first point of time and the second point of time, The power usage of the power equipment can be read out by time.

In this case, when the amount of change in the first time point and the amount of change in the second time point are positive values, the power device usage amount reading unit may determine an average of the total power usage amount per time period during a predetermined period before the first time point as a reference usage amount .

In addition, when the amount of change in the first time point is a positive value and the amount of change in the second time point is a negative value, the power device usage reading unit may calculate a total power consumption amount The average value and the average value of the total power consumption for each time period during a certain period after the second time point, among the average values of the power consumption amounts.

In addition, the operation center may further include a prediction unit that calculates a prediction function E (t _i ) that minimizes J in the following equation by a least squares method.

J =

(Where P _i denotes the total power consumption of the time zone? T _i )

At this time, the power consumption device reading unit, at any time _{△ t N P N -E (t} N) to the time slot based on the total power consumption amount of the predetermined reference amount or more oh between the vehicle is the first point and the second point, which is defined The power consumption of the power device can be read out by time.

Also, the power device usage reading unit may calculate an average of the total power consumption per time period during a predetermined period before the first time point as a reference usage amount when the error of the first time point and the error of the second time point have a positive value It can be judged.

In addition, the power device usage reading unit may be configured such that when the error amount of the first time point has a positive value and the error amount of the second time point has a negative value, An average of the usage amount and a higher value of the average of the total power usage amount per time period during a certain period after the second time point can be determined as the reference usage amount.

On the other hand, the power unit identification unit may calculate the correlation degree R for each of the comparative power devices according to the following equation, and determine the comparison power device whose correlation degree R exceeds the first reference value as an arbitrary power device.

,

)(x _i is the power usage of any power device in the i-th time zone, y _i is the power usage of the comparison power device in the i-th time zone,

,

)

In addition, the present invention provides a method for controlling a power device, comprising the steps of: receiving a total power usage by a time slot from a customer; reading a power device usage amount by which the at least one arbitrary power device consumes power according to the time slot; There is provided a method of identifying a power device including a power device identification step of identifying a type of an arbitrary power device using a power usage amount of each of the plurality of comparison power devices stored by time and a power usage amount of each arbitrary power device by time slot .

In this case, the power device usage reading step may include calculating a change amount of the total power usage amount by the time slot, calculating a change amount of the total usage amount of the power usage by the time point between the first point of time and the second point of time, And judging the subtracted value as the power consumption of the power device by the time slot.

When the amount of change of the first viewpoint and the amount of change of the second viewpoint have a positive value, the reference amount of usage may be an average of the total power usage by a time period during a predetermined period before the first point of time.

When the amount of change of the first viewpoint is a positive value and the amount of change of the second viewpoint is a negative value, the reference usage amount is a sum of an average of the total power usage amount per time period during a certain period before the first time point, It may be a high value of the average of the total power consumption by the time period over a certain period after the point of time.

On the other hand, the power consumption device is not less than the read phase error amount is defined as a step, P _N -E _(N t) for calculating a prediction function E (t _i) which minimizes J below by the least square equation a certain reference amount claim And a step of determining a value obtained by subtracting the reference amount of usage from the total power usage by the time slot between the first viewpoint and the second viewpoint as the power usage by the time slot of an arbitrary power device.

J =

(Where P _i denotes the total power consumption of the time zone? T _i )

At this time, when the error of the first time point and the error of the second time point have a positive value, the average of the total power consumption amount per time period for a certain period before the first time point may be determined as the reference usage amount.

If the error amount of the first time point has a positive value and the error amount of the second time point has a negative value, the average of the total electric power consumption amount per time period during a certain period before the first time point, It is possible to determine a high value among the average of the total power consumption by a time period during a certain period after the time point as the reference consumption amount.

Meanwhile, the power device identifying step may include calculating a correlation degree R of each comparative power device according to the following equation, and calculating a correlation degree R of the comparison power device with the correlation degree R exceeding the first reference value as an arbitrary power device .

,

)(x _i is the power usage of any power device in the i-th time zone, y _i is the power usage of the comparison power device in the i-th time zone,

,

)

In this case, when there are a plurality of comparative power devices in which the correlation degree R exceeds a first reference value, the maximum power usage ratio of the comparative power device and the minimum power ratio And determining a comparative power device having at least one of a usage ratio, an average power usage ratio, and an initial driving power usage ratio within a certain range as an arbitrary power device.

If there is no comparative power device with the correlation degree R exceeding the first reference value, the maximum power usage ratio of the comparative device and the arbitrary power device that the correlation degree R exceeds the second reference value and is equal to or less than the first reference value a minimum power usage ratio, an average power usage ratio, and an initial driving power usage ratio within a certain range may be determined as an arbitrary power device.

The present invention has the advantage of identifying the type of power devices installed in the customer without measuring the smart tag and measuring the power consumption of the power device can reduce the construction cost of the smart grid business.

1 and 2 are views schematically showing a configuration of a system for identifying a power device according to an embodiment of the present invention.
FIG. 3 is a graph showing the total electric power consumption by time of a customer in accordance with the passage of time.
Fig. 4 is a table showing the degree of correlation and the power consumption ratio according to the comparison power device.
5 to 7 are flowcharts illustrating a method of identifying a power device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 and 2 are views schematically showing a configuration of a system for identifying a power device according to an embodiment of the present invention.

Referring to FIG. 1, a system for identifying a power device according to an exemplary embodiment of the present invention may include a watt-hour meter 10 installed in a customer and measuring a total amount of power consumed by a customer in a time period. It may also include a smart meter 20 that is installed in the customer and receives the total power usage by time of the customer measured from the watt hour meter 10. In addition, it receives the total electric power consumption by the hour of the customer measured by the smart meter 20, reads the electric power consumption by at least one arbitrary electric power equipment in the total electric power consumption per time slot received, And an operation center 30 for identifying a type of an arbitrary electric power device in comparison with the electric power consumption amount of the device by time slot. Here, the power device performs the desired function by using the power flowing through the power line. The power device includes all devices that consume power including a refrigerator, an air conditioner, a washing machine, a television, and an office equipment.

The watt hour meter 10 and the smart meter 20 may be connected by a wired or wireless network and the smart meter 20 and the operation center 30 may be connected by a wired or wireless network.

The configuration of the watt hour meter, the smart meter, and the operation center will be described in detail with reference to FIG.

The watt hour meter (10) is provided in the customer and measures the total power consumption by the time of the customer. The watt hour meter 10 may be installed in a distribution board provided in a customer. The watt-hour meter 10 may include a power consumption measuring unit 11 for measuring the total power consumption by the time of the customer and a metering quantity transmitter 12 for transmitting the total power consumption by the measured time slot to the smart meter 20 have.

The power consumption measuring unit 11 measures the total power consumption P _i for each time slot of the customer. P _i is the total power consumption in the i-th time zone. Here, the time zone means unit time, and the unit time can be second, minute, or hour, but is not limited thereto. That is, the power consumption measuring unit 11 measures the total power consumption of the customer for each unit time. Total power usage refers to all power usage consumed in a single customer. To be more specific, in a time △ t _i overall power usage to the starting point is a total power amount used in suyongga to the end point t _{i + 1} at t _i, start time t _i at the end t _{i + 1} in The time interval becomes the time zone. For example, if the unit time is 1 second, the total power consumption P ₁ to P ₆₀ of ₆₀ time zones? T ₁ to? T ₆₀ is measured for 1 minute. The metric amount transmission unit 12 transmits the total amount of power consumption by the time period of the measured customer to the smart meter 20.

The smart meter 20 receives the total power consumption by the time slot of the customer from the watt hour meter 10 and transmits it to the operation center 30.

The smart meter (20) includes a meter transmitter / receiver (21) for receiving the total power consumption by time slot received from the watt hour meter (10). The meter transceiver 21 transmits the total power usage by the received time zone to the operation center 30. In addition, the meter transceiver 21 receives power device identification information from the operation center 30.

Meanwhile, the smart meter 20 may further include a display unit 22 for displaying the type of power equipment used in the customer. In addition, the power consumption and the cumulative power consumption of each power device can be displayed by the time zone. In addition, the start time of use of each power device and the cumulative operation time of each power device can be displayed.

The operation center 30 reads the power consumption amount of each of the at least one or more arbitrary power devices in accordance with the received total power usage by the time slot, The type of an arbitrary power device is discriminated in comparison with the usage amount.

The operation center 30 may include a power consumption receiving unit 31 for receiving the total power consumption by the time of the customer measured from the smart meter 20. In addition, the operation center 30 may include a power consumption storage unit 32 for storing the total power consumption by the time of the received customer. The power device usage amount reading unit 33 may also include a power device usage amount reading unit 33 that reads the power usage amount of each at least one arbitrary power device by time slot in the total power usage amount by the time slot. In addition, it may include a database unit 34 for storing information on power usage by time of the comparison power device. The power device identification unit 36 may include a power device identification unit 36 for identifying an arbitrary power device type by comparing the power usage by a time unit of an arbitrary power device with the power usage by time of the comparison power device. The smart meter 20 may further include an identification information transmitter 37 for transmitting power device identification information for the type of the arbitrary power device identified by the power device identifier 36 to the smart meter 20.

Hereinafter, the power device usage amount reading unit 33 will be described in detail with reference to FIG.

FIG. 3 is a graph showing the total electric power consumption by time of a customer in accordance with the passage of time.

The power device usage reading unit 33 reads the power usage amount of each at least one arbitrary power device by time in the total power usage amount by time of the customer. The total power usage of the customer over time is the sum of the power usage used by one or more power devices. That is, the total electric power consumption by the time slot is the sum of electric power consumption of all power electric appliances used in the customer in the corresponding time zone.

The power unit amount reading unit 33 calculates the time slot change amount D _i of the total power usage time zone. The time-based amount of change D _i is the difference in total power consumption in the two adjacent time zones. For example, if the total power usage of timezones Δt _i and Δt _{i + 1} is P _i and P _{i + 1} respectively, the variation D _i between the two time periods is P _{i + 1} -P _i . The power device usage amount reading unit 33 continuously calculates a change amount of the total power usage amount in two adjacent time zones.

In addition, the power device usage amount reading unit 33 reads the power usage amount obtained by subtracting the reference usage amount from the total power usage amount for each time period between the first time point and the second time point at which the magnitude of the change amount is equal to or greater than a predetermined reference amount, It is judged based on power consumption. At this time, the amount of change at the first time point is limited to the case of having a positive value. That is, the fact that the amount of change at the first time point has a positive value means that any electric power device has started to be used at the first time point, and the electric power device usage reading unit 33 has started to use any electric power device And reads the electric power consumption by time zone for a predetermined period after the time point. The predetermined reference amount is used to determine the point of use of an arbitrary power device. The predetermined reference amount may be set by the system operator and may be a minimum initial driving usage amount among initial driving usage amounts of various power devices used in the customer. That is, if the initial driving power consumption of various power devices such as a refrigerator, a washing machine, a television, and a blender used in a customer is 2W to 10W, the minimum initial driving consumption of 2W may be the predetermined reference amount.

3, the first and second time points are times t ₁ , t ₁ , t _m , and t _n , respectively, at which a magnitude of a change amount equal to or greater than a predetermined reference amount occurs (FIG. It is assumed that power device B is turned on at time t ₁ and turned off at t _m and power device C is turned on at time t ₁ and turned off at time t _n . Is defined as a first section and a second section. That is, defined as the target time t ₁ and t _l the amount of change in volume for, claim the time span between t _l at time t ₁ 1 period, a time range from time t _l t _m in the second region.

The reference usage amount is determined by the amount of change at the second time point. As described above, the amount of change at the first time point is limited to the case of having a positive value. The fact that the amount of change is negative at the first time point means that the use of any power device is stopped.

First, when the amount of change at the second time point has a positive value, the average of the total power consumption amount per time period during a certain period (Δt _e ) before the first time point becomes the reference usage amount. Referring to FIG. 3, a change amount equal to or greater than a predetermined reference amount occurs at time t ₁ and time t ₁ . At this time, the time t ₁ becomes the first time and the time t _l becomes the second time. In addition, since the change amount D ₁ has a positive value at the second time point, the reference usage amount is an average of the total power consumption amount per time period during the predetermined time period Δt _e before the first time point. 3 the average over a period of time indicated by jeomseom in) Thus, at the time the time slot electric power consumption of any of the power devices of the first interval between the time t _l at t ₁ is at full power consumption P _i time slot of the first section Is a value obtained by subtracting D _e1, which is the average of the total power consumption per time period during a certain period (Δt _e ) before the first point in time. That is, at time t ₁ time slot electric power consumption of any of the power devices used in the first section between the time t _l is the first point in time t ₁ before the period of time in the first interval time slot the total power consumption while ( △ t _e ) of the total power usage over time (D _e1 ). This can be expressed as follows.

A1 _i = P _i - D _e1

Here, A1 _i is the power consumption of the i-th time zone of the arbitrary power equipment in the first section, P _i is the total power consumption of the i-th time zone, and D _e1 is the average of the total power consumption by the time zone during a certain period before the first point it means.

Next, when the amount of change at the second time point is a negative value, the average of the total power consumption amount per time period during a certain period before the first time point and the average of the total power usage amount over a certain time period after the second time point The value is the reference usage.

3, the second period, the first time point t _l, the second point is a t _m, t _m in size of the change amount is negative. In this case, the time read out based on usage for the classified power consumption of any electric equipment used in the second period is the average over the first time point of t _l previous period of time (△ t _e) of the second section D _e2 and D _{e2, which} is the higher value of D _{e3, which} is the average during a certain period (Δt _e ) after the second time t _m , becomes the reference usage amount. Therefore, the power consumption of a certain power device during the second period is D _e2 , which is an average of the total power consumption during a certain period before the first time t _l in the total power usage P _i in the second period Is subtracted. That is, the time during the time t _l time slot electric power consumption of any electric equipment used in the second section between t _m, the second section during the time slot the total power amount the first time point of time t _l the previous period of time in (D _e2 ) of the total power usage by each household. This can be expressed as follows.

A2 _i = P _i - D _e2

Wherein A2 _i is the i-th time zone, electric power use amount of any power device in the second period, P _i is the total power usage of the i-th time, D _e2 is the average of the time slot the total power consumption for a predetermined period prior to the first time point it means.

In the third section, since the amount of change is negative at the first point in time t _m , the power consumption of any power device in the third section is not read out by time.

Meanwhile, an operation center 30 of a system for identifying a power device according to another embodiment of the present invention includes a predicting unit 35 for calculating a prediction function E (t _i ) that minimizes J in the following equation by a least square method, As shown in FIG.

J =

The prediction function E (t _i ) may be a polynomial function of a linear function or more. In order to increase the prediction probability of the prediction function, it is preferable that the function is a second order higher order polynomial function.

Power unit amount reading unit 33 of the system for identifying a power unit according to an embodiment different days of the invention to a future time using the predicting function E (t _i) calculated by the predictor (35) △ t _N The total power consumption E (t _N ) of the power consumption E (t _N ) is compared with the actual total power usage P _N actually received. If the error value is equal to or greater than a predetermined reference amount,

More specifically, in the time slot between the total power amount of the power consumption devices reading unit 33 has a first point and a second point not less than error amount, which is defined in the time zone as △ t _N P _N -E (t _N) predetermined reference amount The amount of power used by an arbitrary power device is read out by the amount of time used.

When the error of the first time point and the error of the second time point have a positive value, the power device usage amount reading unit 33 calculates an average of the total power consumption amount per time period during a certain period before the first time point, It is judged as the usage amount. In addition, when the error amount of the first time point has a positive value and the error amount of the second time point has a negative value, the power device usage amount reading unit 33 calculates a time period The average value of the power consumption per unit time and the average of the total power consumption per unit time over a certain period of time after the second point in time is used as the reference usage amount.

That is, in the above-described embodiment, it is determined that the use of an arbitrary power device occurs when the amount of change in the power usage by time zone is equal to or greater than a predetermined reference amount. However, in this embodiment, the difference between the usage amount predicted by the prediction function and the actually measured usage amount It is determined that the use of an arbitrary electric power device occurs when the electric power is equal to or higher than the predetermined reference amount. According to the present embodiment, it is possible to more accurately determine whether or not any power device is used.

Hereinafter, the power device identification unit 36 will be described in detail.

First, the database unit 34 stores information on power consumption by time of a plurality of comparison power devices. That is, the database unit 34 stores power consumption information for each comparison power device by time slot. For example, information on power consumption by time of all electric power equipment installed in a customer such as a refrigerator, a washing machine, a vacuum cleaner, and a television is stored. The power usage information by time of each comparative power device includes the power usage amount per time period from the moment when the comparative power device is initially driven to a certain period. The database unit 34 stores the power consumption of the comparison power device at the time of driving and the power consumption of the comparison power device at each unit time from the driving time in the database unit 34.

The power device identification unit 36 compares the power usage amount of each comparative power device stored in the database unit 34 with the time period and the power usage amount of each power device read out by the power device usage reading unit 33 Thereby identifying the type of the power device.

More specifically, the correlation degree R is calculated for each of the comparative power devices stored in the database unit 34 according to the following equation, and the type of an arbitrary power device is identified according to the calculated correlation degree R.

,

이며, x_i는 i번째 시간대의 임의의 전력기기의 전력사용량을 의미하며, y_i는 i번째 시간대의 비교 전력기기의 전력사용량을 의미한다. 이때, 비교기간 동안 임의의 전력기기의 시간대별 전력사용량 정보의 개수와 비교 전력기기의 시간대별 전력사용량 정보의 개수는 총 N개이다. 여기서 비교기간이란, 1번째 시간대에서 N번째 시간대까지의 시간을 의미한다. 예를 들어, 시간대가 1분이고 총 30번째 시간대까지의 전력사용량 정보가 존재한다면, 비교기간은 30분이 된다. 한편, 상기 시간대별 전력사용량 정보의 개수 N은 상기 제1시점부터 제2시점까지 시간대별 전체 전력사용량 정보의 개수와 동일하거나 그 이하일 수 있다. 예를 들어, 상기 제1시점부터 제2시점까지 시간대별 전체 전력사용량 정보의 개수가 100개라면 상관정도 R의 산출에 이용되는 임의의 전력기기의 시간대별 전력사용량 정보의 개수는 100개이거나 그 이하일 수 있다. 상기

는 비교기간 동안 임의의 전력기기의 시간대별 전력사용량의 평균을 의미하며,

는 상기 비교기간 동안의 비교 전력기기의 시간대별 전력사용량의 평균을 의미한다. 상기 상관정도 R은

의 값을 가진다. 이때, 임의의 전력기기의 시간대별 전력사용량 정보의 개수와 비교 전력기기의 시간대별 전력사용량 정보의 개수는 동일하다. here,

,

X _i is the power consumption of any power device in the i-th time zone, and y _i is the power consumption of the comparison power device in the i-th time zone. At this time, during the comparison period, the total number of pieces of power usage information by time of an arbitrary power device and the number of pieces of power usage information by time of the comparison power device are N in total. Here, the comparison period means the time from the first time zone to the Nth time zone. For example, if the time zone is 1 minute and the power usage information up to the 30th time zone is present, the comparison period is 30 minutes. The number N of power usage information by time slot may be equal to or less than the total number of power usage information by time slot from the first time point to the second time point. For example, if the total number of power usage information for each time slot from the first time point to the second time point is 100, the number of pieces of power usage information for each power device used for calculation of the correlation degree R is 100, ≪ / RTI > remind

Means the average of the power consumption of an arbitrary electric power device for each time period during the comparison period,

Means an average of power consumption of the comparative power devices during the comparison period by time slot. The correlation degree R

Lt; / RTI > At this time, the number of pieces of power usage information by time of an arbitrary power device and the number of pieces of power usage information by time slot of the comparative power device are the same.

The power device identification unit 36 calculates the degree of correlation R between each of the plurality of comparison power devices stored in the database unit 34 and an arbitrary power device.

In addition, the power device identification unit 36 determines that the comparison power device whose correlation degree R exceeds the first reference value is an arbitrary power device. Here, the first reference value is preferably an arbitrary value of 0.5 or more, more preferably 0.8 or more. On the other hand, when there are two or more comparison power devices in which the correlation R exceeds the first reference value, the power device identification unit 36 compares the maximum power usage ratio of any power device and the comparison power device, , The average power usage ratio, and the initial driving power usage ratio is within a certain range, is determined as an arbitrary power device.

Here, the maximum power consumption is the maximum power consumption of any power device or the comparative power device during the comparison period, the minimum power consumption during the comparison period, the minimum power usage during the comparison period, Means the average power usage of any power device during the time period. In addition, the initial driving power consumption means the amount of power used immediately after any power device or the comparative power device is operated.

Therefore, the ratio is a value obtained by dividing the power consumption of an arbitrary power device by the power consumption of the comparative power device (or the power consumption of the comparative power device divided by the power consumption of an arbitrary power device). have.)

The power device identification unit 36 determines any power device if any one of the maximum power usage ratio, the minimum power usage ratio, the average power usage ratio, and the initial driving power usage ratio is equal to or greater than the set reference ratio. Here, the greater the number of power usage ratios existing within a certain range of the plurality of power usage ratios, the higher the probability of the comparison power equipment. For example, when the comparison power device 1 is within a certain range of the maximum power usage ratio, and the comparison power device 2 is within a certain range of the maximum power usage ratio and the minimum power usage ratio, the comparison power device 2 is connected to an arbitrary power device It can be judged.

If the number of comparative power devices having a large number of power usage ratios within a certain range is determined as the type of arbitrary power devices, if the number of power usage ratios existing within a certain range is the same, It is preferable to determine the type of the power device. Also in this case, it is preferable to judge the comparative power device having a power usage ratio close to 1 when there are a plurality of comparative power devices having the same condition as an arbitrary power device. In addition, the initial driving power consumption ratio can be set as a criterion based on a weighted value that is greater than the other power consumption ratio.

Referring to FIG. 4, when the first reference value is 0.8, the comparative power device in which the correlation degree R exceeds 0.8, which is the first reference value, is a computer and two televisions. At this time, the correlation R between the computer and the television is 0.85 and 0.84, respectively. At this time, the power device identification unit 36 calculates at least one of the initial driving power usage ratio, the maximum power usage ratio, the minimum power usage ratio, and the average power usage ratio, and determines the type of an arbitrary power device based on this. The power device identification section 36 determines an arbitrary power device according to a predetermined criterion. That is, the power device identification unit 36 can determine an arbitrary power device as the comparison power device having a large number of the plurality of power usage ratios in a certain range. For example, a comparative power device having a power consumption ratio in the range of 0.8 to 1.2 can be determined as any power device. In this case, since the power consumption ratio of the computer is all within the above range, the computer can be judged to be any power device. If all the power consumption ratios of the two comparative power devices are within a certain range, the comparative power device having a large number of power usage ratios in a certain range can be determined as any power device. If two comparison power devices have the same number of power usage ratios that exist in a certain range, it is possible to determine the weighting factor of any one of the power usage ratios. For example, when the number of power usage ratios existing in a certain range is the same, a comparative power device whose initial driving power usage ratio is close to 1 can be determined as an arbitrary power device by weighting the initial driving power usage ratio.

5 to 7, a method of identifying a power device according to an embodiment of the present invention will be described.

Referring to FIG. 5, there is provided a method of controlling a power consumption of a power device, the method comprising: receiving power usage amount (S10) for receiving a total power usage amount by a time slot from a customer; (S20), a power device identification step (S35) for identifying the type of an arbitrary power device by using the power usage amount of each of the plurality of comparison power devices stored by time and the power usage amount of each arbitrary power device can do.

In the power consumption reception step (S10), the power consumption of each power device of each power device is received from the watt hour meter (10) installed in the customer. The watt hour meter 10 can be installed in a distribution panel of a customer. The power consumption measuring unit 11 of the watt hour meter 10 measures the total power consumption by the time period used in the customer. Here, each time zone means a unit time, and the unit time may be seconds, minutes, or hours, but is not limited thereto. The power consumption measuring unit 11 transmits the total power consumption by time of the measured customer to the meter transmitting and receiving unit 21 of the smart meter 20 at step S110 and the meter transmitting and receiving unit 21 transmits, To the power consumption reception unit 31 of the control unit 30.

The power device usage reading step (S20) reads the power usage amount of each at least one arbitrary power device by time slot in the total power usage by time slot.

Referring to Figure 6, when subject to one embodiment of the invention, the power unit amount read out step (S20) is (S21) change amount calculation step of calculating the amount of change D _i of the total power consumption P _i classified the time, the amount of change The value obtained by subtracting the reference usage amount from the total power usage amount P _i for each time slot between the first time point and the second time point in which the size of D _i is equal to or greater than a predetermined reference amount (S 22) ). ≪ / RTI >

In the power device usage reading step S20, the power device usage reading unit 33 continuously calculates the change amount (S21) while confirming whether or not the change amount of the total power use amount in the adjacent two time zones is equal to or greater than a predetermined reference amount (S22) . At this time, the power device usage reading unit 33 continuously calculates the amount of change until the second time point at which the amount of change is equal to or greater than a predetermined reference amount is derived. When the second time point is derived, the reference usage amount is subtracted from the total power usage amount for each time period between the first time point and the second time point, and the power usage amount by time slot of any power device used between the first time point and the second time point is read (S23)

If the amount of change of the first viewpoint and the amount of change of the second viewpoint have a positive value, the reference usage amount is an average of the total power usage amount per time period during a certain period before the first time point.

When the amount of change of the first viewpoint is a positive value and the amount of change of the second viewpoint is a negative value, the reference usage amount is a sum of an average of the total power usage amount per time period during a certain period before the first time point, And becomes a high value of the average of the total power consumption by the time period during a certain period after the second time point.

Referring to FIG. 7, according to another embodiment of the present invention, the power device usage reading step S20 may include calculating a prediction function E (t _i ) that minimizes J in the following equation by a least squares method (S27), which is defined as S _N (S 25) and P _N -E (t _N ), is equal to or greater than a predetermined reference amount (S27) (S28) the power usage by the power unit of an arbitrary power device.

J =

In the power device usage reading step S20, the power device usage amount reading unit 33 continuously checks whether the size of the error vehicle defined as P _N -E (t _N ) is equal to or greater than a predetermined reference amount (S27) 35 is a prediction function E (t _i) to calculate (S25) and the power unit amount reading unit 33 continuously calculates (S26) the error amount. At this time, the power device usage reading unit 33 continuously calculates the error amount until the second time point where the error amount is equal to or greater than a predetermined reference amount is derived. When the second time point is derived, the reference usage amount is subtracted from the total power usage amount for each time period between the first time point and the second time point, and the power usage amount by time slot of any power device used between the first time point and the second time point is read (S28)

At this time, when the error at the first time point and the error at the second time point have a positive value, the average of the total electric power consumption amount per time period during a predetermined period before the first time point is determined as the reference consumption amount.

When the error of the first time point has a positive value and the error of the second time point has a negative value, an average of the total electric power consumption amount per time period during a certain period before the first time point, Of the average of the total power consumption by the time period during a certain period of time.

Referring to FIG. 5 again, the power device identification step S35 may be performed by comparing the power usage amount of each of the plurality of comparison power devices stored in the database unit 34 with respect to time, It is judged that the comparative power device having the highest correlation degree is an arbitrary power device.

The database unit 34 stores power consumption of each of the plurality of comparison power devices by time slot. The database unit 34 stores information on the maximum power consumption, the minimum power consumption, and the average power consumption during the comparison period including the initial driving power consumption of each comparison power equipment. The power consumption per unit time means the power consumption per unit time.

According to an embodiment of the present invention, the power device identification step S35 may include a correlation degree calculation step S30 for calculating the correlation degree R and a case where the correlation degree R exceeds the first reference value S40. (Step S70). The power device determination step S70 may include determining the power device as a comparison power device.

The degree of correlation R is calculated by the following equation.

,

이며, x_i 는 i번째 시간대의 임의의 전력기기의 전력사용량을 의미하며, y_i는 i번째 시간대의 비교 전력기기의 전력사용량을 의미한다. 이때, 임의의 전력기기의 시간대별 전력사용량은 비교기간 동안 계측된 것으로 상기 비교기간 동안 시간대별 전력사용량의 개수는 총 N개이다. 더불어, 상기

는 일정시간 동안 임의의 전력기기의 시간대별 전력사용량의 평균을 의미하며,

는 상기 일정시간 동안의 비교 전력기기의 시간대별 전력사용량의 평균을 의미한다. 상기 상관정도 R은

의 값을 가진다.here,

,

X _i is the power consumption of any power device in the i-th time zone, and y _i is the power consumption of the comparison power device in the i-th time zone. At this time, the power consumption by the time slot of any power device is measured during the comparison period, and the total number of power usage by the time slot during the comparison period is N total. In addition,

Means the average of the power consumption of a certain power device for each time period during a predetermined time,

Means an average of the power consumption of the comparative power devices over the time period. The correlation degree R

Lt; / RTI >

The correlation degree R is calculated by the power device identification unit 36 of the operation center 30. [ The power device identification unit 36 calculates the degree of correlation R for each of the comparative power devices using the power usage amount of each of the plurality of comparison power devices stored in the database unit 34 and the power usage amount of each power device by time . At this time, if the correlation degree R exceeds the first reference value, the comparative power device is determined as a type of an arbitrary power device (S70). Here, the first reference value may be 0.8.

On the other hand, if there are more than two comparative power devices having the correlation R equal to or greater than the first reference value (S50), it may further include a detailed determination step (S60). In the detailed determination step S60, at least one of the maximum power usage ratio, the minimum power usage ratio, the average power usage ratio, and the initial driving power usage ratio of any power device and the comparison power device is within the set range The comparative power device is determined to be an arbitrary power device.

Here, the maximum power consumption is the maximum power consumption of any power device or the comparative power device during the comparison period, the minimum power consumption during the comparison period, the minimum power usage during the comparison period, Means the average power usage of any power device during the time period. In addition, the initial driving power consumption means the amount of power used immediately after an arbitrary power device or a comparative power device is connected to the outlet.

Therefore, the ratio is a value obtained by dividing the power consumption of any power device by the power consumption of the comparison power device. (Or can be defined as a value obtained by dividing the power consumption of the comparative power device by the power consumption of the arbitrary power device).

The power device identification unit 36 determines any power device if any one of the maximum power usage ratio, the minimum power usage ratio, the average power usage ratio, and the initial driving power usage ratio is equal to or greater than the set reference ratio. Here, the greater the number of power usage ratios existing within a certain range of the plurality of power usage ratios, the higher the probability of the comparison power equipment. For example, when the comparison power device 1 is within a certain range of the maximum power usage ratio, and the comparison power device 2 is within a certain range of the maximum power usage ratio and the minimum power usage ratio, the comparison power device 2 is connected to an arbitrary power device It can be judged.

If the number of comparative power devices having a large number of power usage ratios within a certain range is determined as the type of arbitrary power devices, if the number of power usage ratios existing within a certain range is the same, It is preferable to determine the type of the power device. Also in this case, it is preferable to judge the comparative power device having a power usage ratio close to 1 when there are a plurality of comparative power devices having the same condition as an arbitrary power device. In addition, the initial driving power consumption ratio can be set as a criterion based on a weighted value that is greater than the other power consumption ratio.

If the correlation degree R does not exceed the first reference value (S40), it is determined that the correlation degree R exceeds the second reference value and is less than the first reference value (S90 (Step S60) of performing a detailed determination on the comparison power device.

That is, the detailed determination step S60 performed when there are a plurality of comparative power devices having the correlation degree R exceeding the first reference value is performed when the correlation degree R exceeds the second reference value and is less than the first reference value. More specifically, the comparative power R is calculated by comparing the power consumption of each power device of each power device stored in the database 34 with the power consumption of each power device by time slot, and when the power of the comparison power R exceeds the first reference value If the device is not present, a detailed determination step S60 is performed. At this time, the detailed determination step S60 is performed on the comparison power device whose correlation degree R exceeds the second reference value. Since the detailed determination step S60 is the same as described above, a detailed description will be omitted.

Meanwhile, a method of identifying a power device according to an exemplary embodiment of the present invention includes an identification information transmission step (S80) of transmitting the power device identification information generated by the power device identification unit 36 to the smart meter 20 . When the type of an arbitrary power device is identified by the above-described steps, the power device identification section 36 transmits the power device identification information regarding the identified type of the power device to the smart meter 20. At this time, the smart meter 20 can display an arbitrary power device type according to the power device identification information through the display part 22. [

Also, the method of identifying the power device according to an embodiment of the present invention is characterized in that when the power device identification part 36 can not identify any power device, it generates the unidentifiable information, An unidentifiable step (S100) for transmitting to the smart meter, and a power device input step (S110) for receiving a type of an arbitrary power device by a user.

In the unidentifiable step, when the correlation degree R is equal to or less than the first reference value, the power device identification unit 36 generates non-identifiable information indicating that any power device can not be identified, Lt; / RTI >

In the power device input step (S110), a user of the consumer can input the type of an arbitrary power device through the power device input part 23 provided in the smart meter 20. That is, when an arbitrary power device can be identified by the power device identification part 36, information on the type of an arbitrary power device is displayed on the display part 22 in the smart meter 20 (S170). , The display unit 22 can display 'NOT Identified' message as unidentifiable information if the arbitrary power device can not be identified, and the user can display the non-identifiable information on the display unit 22 when the smart meter 20 The type of an arbitrary electric power device can be inputted through the electric power device input part 23 provided in the electric power device.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments described in the present invention are not intended to limit the technical idea of the present invention but to explain, and the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

10 Watt hour meter 11 Power consumption meter
12 meter measurement transmitter 20 Smart meter
21 meter transmitting / receiving unit 22 display unit
23 Power equipment input section 30 Operation center
31 Power consumption reception unit 32 Power consumption storage unit
33 Power unit usage reading unit 34 Database unit
35 Prediction Unit 36 Power Unit Identification Unit
37 Identification information transmitter

Claims (19)

An electricity meter installed in the consumer and measuring the total power consumption by time;
A smart meter for receiving the total power consumption by the time slot of the customer from the electricity meter; And
A power consumption receiver which receives the total power consumption by the time zone of the customer from the smart meter, a power device usage reading unit that reads the power consumption by the time slots of at least one power device from the total power consumption by the time zone, and a plurality of power consumption receivers; A power unit for identifying a type of any power device by using a database unit for storing time-phase power consumption information of the comparison power device, and the power consumption by time zone and power consumption by time zone of the comparison power device. An operating center including an identification unit; System for identifying a power device comprising a. The method of claim 1,
Wherein the power device usage reading unit calculates a change amount of the total power usage amount in each time period and calculates a change amount of the total power usage amount in the power saving mode by subtracting the reference usage amount from the total power usage amount by the time period between the first time point and the second time point, And reading the power usage of the device by time zone. The method of claim 1,
Wherein the operation center further comprises a predictor for calculating a prediction function E (t _i ) that minimizes J in the following equation by a least squares method.
J =

(Where P _i denotes the total power consumption of the time zone? T _i ) The method of claim 3,
The power device usage reading unit subtracts the reference usage amount from the total electric power usage amount by the time period between the first time point and the second time point where the error amount defined by P _N -E (t _N ) in a certain time zone? T _N is equal to or greater than a predetermined reference amount And reads the power usage amount of the arbitrary power device by the time slot. The method of claim 2,
The power device usage reading unit may determine an average of the total power usage amount per time period during a predetermined period before the first time point as a reference usage amount when the change amount of the first time point and the change amount of the second time point have a positive value To identify the power device. The method of claim 2,
Wherein the power device usage reading unit reads the average power consumption of each power unit during a predetermined time period before the first point of time when the amount of change of the first point of time has a positive value and the amount of change of the second point of time has a negative value, And determining a high value of the average of the total power usage amount for each time period during a predetermined period after the second time point as a reference usage amount. 5. The method of claim 4,
The power device usage reading unit may determine that the average of the total power usage by the time period during a predetermined period before the first time point is a reference usage amount when the error at the first time point and the error at the second time point have a positive value ≪ / RTI > 5. The method of claim 4,
The power device usage reading unit may be configured to determine whether or not the power consumption of the first time point has a positive value and the second time point of the second time point has a negative value, And the average value of the average of the total power consumption for each time period during a predetermined period after the second time is determined as the reference usage amount. The method of claim 1,
Wherein the power device identification unit calculates the correlation degree R for each of the comparison power devices according to the following equation and determines that the comparison power device whose correlation degree R exceeds the first reference value is an arbitrary power device: Identifying system.

(x _i is the power usage of any power device in the i-th time zone, y _i is the power usage of the comparison power device in the i-th time zone,

,

) A power consumption receiving step of receiving the total power consumption for each time zone from the customer;
A power device usage reading step of reading time-phase power consumption of at least one arbitrary power device from the total power consumption by time zone; And
A power device identification step of identifying a type of any power device by using the time-phase power consumption of the plurality of comparison power devices and the time-phase power consumption of the arbitrary power device; The method of claim 10,
The power device usage reading step
A change amount calculating step of calculating a change amount of the total power consumption amount by the time period; And
And determining a value obtained by subtracting the reference usage from the total power consumption for each time zone between the first time point and the second time point at which the magnitude of the change is greater than or equal to a predetermined reference amount as the power consumption for each time zone of the power device. A system for identifying a power device. The method of claim 11,
Wherein when the change amount of the first time point and the change amount of the second time point are positive values, the reference usage amount is an average of the total power usage amount by a time period during a certain period before the first time point Way. The method of claim 11,
When the amount of change of the first viewpoint is a positive value and the amount of change of the second viewpoint is a negative value, the reference usage amount is a sum of an average of the total power usage amount per time period during a certain period before the first time point, Is a high value of the average of the total power consumption by the time period during a predetermined period after the time point. The method of claim 10,
The power device usage reading step
Calculating a prediction function E (t _i ) that minimizes J in the following equation by a least squares method; And
A value obtained by subtracting the reference consumption amount from the total power consumption by the time period between the first time point and the second time point where the error amount defined by P _N -E (t _N ) in a certain time zone? T _N is equal to or greater than a predetermined reference amount, And determining the power usage by the time slot of the power device.
J =

(Where P _i denotes the total power consumption of the time zone? T _i ) 15. The method of claim 14,
Wherein the control unit determines the average of the total power consumption by the time period during a predetermined period before the first time when the error of the first time point and the error of the second time point are positive values, Lt; / RTI > 15. The method of claim 14,
When the error of the first time point has a positive value and the error of the second time point has a negative value, an average of the total electric power consumption amount per time period during a certain period before the first time point, Of the average value of the total power consumption for each time period during a predetermined period of time. The method of claim 10,
The power device identification step
Calculating a correlation degree R of each of the comparative electric power devices according to the following equation; And
And determining that the comparison power device whose correlation degree R exceeds the first reference value is an arbitrary power device.

(x _i is the power usage of any power device in the i-th time zone, y _i is the power usage of the comparison power device in the i-th time zone,

,

) 18. The method of claim 17,
When there are a plurality of comparison power devices in which the correlation degree R exceeds the first reference value,
At least one of the maximum power usage ratio, the minimum power usage ratio, the average power usage ratio, and the initial driving power usage ratio of the comparative power device and the arbitrary power device whose correlation degree R exceeds the first reference value is within a certain range Further comprising the step of determining the comparison power device as an arbitrary power device. 18. The method of claim 17,
If there is no comparison power device in which the correlation degree R exceeds the first reference value,
At least one of the maximum power usage ratio, the minimum power usage ratio, the average power usage ratio, and the initial driving power usage ratio of the comparative device and the arbitrary power device whose correlation degree R exceeds the second reference value and is equal to or less than the first reference value Further comprising the step of determining a comparison power device existing within a certain range as an arbitrary power device.

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