KR20210046428A - Monitoring server, method and program for synchronizing time of electric energy monitor devices - Google Patents

Abstract

According to the present invention, a monitoring system for monitoring power includes: a power monitor for receiving an interval signal of a preset time interval and a pulse signal for power usage from an electricity meter; a management server connected to the electricity meter; and a monitoring server which receives data on each power usage from the power monitor and synchronizes the time of the power monitor with the time of the electricity meter, wherein the monitoring server includes: a first receiver configured to receive first power amount data from the management server; a second receiver configured to receive second power amount data from the power monitor; and a time code calculator for calculating a time difference value having the smallest error between the first power amount data and the second power amount data.

Description

A monitoring server, method, and computer program that synchronizes the time of the electric energy monitor {MONITORING SERVER, METHOD AND PROGRAM FOR SYNCHRONIZING TIME OF ELECTRIC ENERGY MONITOR DEVICES}

The present invention relates to a power amount monitoring server, a method and a computer program for synchronizing the time of the power amount monitor in connection with the operation of the power demand response.

It is difficult to store electricity economically, so supply and demand must be maintained in real time. However, supply and demand may fluctuate rapidly and the supply and demand situation may deteriorate within a very short time. The electric power industry for operating such electric power is capital-intensive and it takes a very long time to construct electric power supply facilities (power plants, transmission lines, etc.).

In this regard, FIG. 1 is a diagram showing the concept of a demand response business. Referring to Figure 1, the demand response business is a method in which customers such as factories/buildings are registered with the power exchange (KPX) for the capacity of electric resources that can be reduced, and sales proceeds that have been reduced according to the reduction implementation instruction are provided. It is operated as. Through this demand response, it is possible to provide flexibility in power system operation at a relatively low cost, and to avoid investment in power generation facilities by reducing the maximum power. Accordingly, it is possible to reduce power prices in the short term and reduce power supply costs in the long term.

Customers participating in such demand-response resource transactions will install one real-time power monitoring device per location. At this time, the value of the real-time power monitoring device should maintain the reliability of ±2% with the value of the power meter.

However, in a power meter, two communication ports cannot be connected in parallel to take data, so it is inevitable that only signal lines are provided to the demand management service provider. For this reason, the real-time power amount monitoring device of the demand management company cannot know the time of the power meter.

In addition, since the power meter does not synchronize time with the server in real time, an error may occur between the time of the power meter and the time of the server as time passes.

As a result, there is a problem in that the power data of the power meter and the real-time power amount monitoring device are inconsistent.

KR 10-1855501 B1 (2018.04.30. Enrollment)

An object of the present invention is to provide a monitoring server, a method, and a computer program for synchronizing the time of the power meter and the power amount monitor with each other based on the power consumption data of the power meter and the power consumption data of the power amount monitor connected to the power meter. .

Another object of the present invention is to provide a monitoring server, a method, and a computer program for synchronizing the times of a power meter and a power amount monitor with each other by using a pulse signal generated from a power meter at predetermined time intervals and a pulse signal for power consumption. It is to do.

However, the technical problem to be achieved by the present embodiment is not limited to the technical problems as described above, and other technical problems may exist.

In order to achieve the object of the present invention, the monitoring server according to the present invention synchronizes the time of the power meter with the time of the power amount monitor that receives an interval signal of a preset time interval and a pulse signal for power usage from the power meter. As a result, the first receiving unit for receiving the first power amount data including the power amount value according to the time value from the management server managing the power meter; A second receiver configured to receive second power amount data including power amount values according to time values from the power amount monitor; A time code calculator configured to calculate a time difference value having the smallest error between the first power amount data and the second power amount data; And a winding time synchronization unit for transmitting a signal for adjusting a time to the power amount monitor based on the time difference value.

In order to achieve the object of the present invention, a method of synchronizing the time of the power meter and the time of the power amount monitor according to the present invention for receiving an interval signal of a preset time interval and a pulse signal for power consumption from the power meter, Receiving first power amount data including an power amount value according to a time value from a management server that manages the power meter; Receiving second power amount data including a power amount value according to a time value from the power amount monitor; Calculating a time difference value having the smallest error between the first power amount data and the second power amount data; And adjusting a time value of the second power amount data or a time of the power amount monitor based on the time difference value.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present invention. In addition to the above-described exemplary embodiments, there may be additional embodiments described in the drawings and detailed description of the invention.

According to the present invention, the time of the power meter can be synchronized with the time of the power meter by the power amount data of the power meter and the power amount data of the power meter. Accordingly, time synchronization using limited information generated from the power meter can be implemented. Accordingly, time synchronization can be conveniently performed without adding a device or a separate signal channel to the power meter.

In addition, according to the present invention, the time of the power amount monitor can be synchronized with the time of the power meter by using an interval signal generated from the power meter and a pulse signal for power consumption. In addition, time synchronization can be performed based on a time unit of a preset interval signal, and thus there is an advantage of saving the amount of data for calculation.

1 is a diagram showing the concept of a demand response business.
FIG. 2 is a diagram illustrating a state in which a power amount monitor provided in the power amount monitoring system according to an embodiment of the present invention is connected to a power meter.
3A and 3B are diagrams illustrating a configuration of a power amount monitoring system according to an embodiment of the present invention and a visual system of each configuration.
4 is a diagram showing an example in which the time of the power amount monitor is synchronized with the time of the power meter.
5A and 5B are diagrams illustrating data on power usage of a power meter and a power amount monitor after synchronization according to the process of FIG. 4 is performed.
6 is a flowchart illustrating a time synchronization method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included, and one or more other components are not excluded unless specifically stated to the contrary. It is to be understood that the presence or addition of features, numbers, steps, actions, elements, parts, or combinations thereof, does not preclude the possibility of preliminary exclusion.

In the present specification, the term "unit" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Further, one unit may be realized by using two or more hardware, or two or more units may be realized by one piece of hardware.

In this specification, some of the operations or functions described as being performed by the terminal or device may be performed instead in a server connected to the terminal or device. Likewise, some of the operations or functions described as being performed by the server may also be performed by a terminal or device connected to the server.

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

The monitoring system according to an embodiment of the present invention monitors the amount of power, and is configured to synchronize the time of the power meter, which is a component, with the time of the power meter installed in the power system.

2 is a view showing a state in which the power amount monitor 100 provided in the monitoring system 10 for monitoring the amount of power according to an embodiment of the present invention is connected to the power meter 20, and FIGS. 3A and 3B are A diagram showing a configuration of the power amount monitoring system 10 and a time system of each configuration according to an embodiment of FIG.

2, 3A and 3B, the monitoring system 10 according to an embodiment of the present invention includes a power amount monitor 100 and a monitoring server 200.

The wattage monitor 100 (for example, the real-time wattage monitoring device of Fig. 2) is an interval signal and power at a preset time interval from a power meter 20 (for example, the KEPCO meter of Fig. 2) already installed in the power system. Receives a pulse signal for usage. An EOI (End of Interval) signal line and a usage pulse signal line for transmitting an interval signal may be connected between the power meter 20 and the power amount monitor 100.

Specifically, the interval signal is a pulse signal generated every predetermined period, and may be generated by the power meter 20 and transmitted to the power amount monitor 100. For example, the interval of the interval signal may be a first time interval (eg, 15 minutes), and based on the time of the power meter 20, for example, every hour (0 minutes), 15 minutes, 30 minutes, and May occur in 45 minutes. In addition, a number of pulse signals for power usage may be generated in proportion to the power usage measured by the power meter 20.

The monitoring server 200 performs a function of synchronizing the time of the power amount monitor 100 with the time of the power meter 20 based on data on power usage. To this end, the monitoring server 200 may receive data on power usage from the management server 30 and the power amount monitor 100 connected to the power meter 20, respectively.

Specifically, the monitoring server 200 includes a first receiving unit 210 and a second receiving unit 220.

The first receiver 210 receives first power amount data from the management server 30 connected to the power meter 20. The first power amount data is data on power consumption measured by the power meter 20, and may be data storing power consumption at a preset first time interval (eg, 15 minutes).

The second receiver 220 receives second power amount data from the power amount monitor 100. The second power amount data is data on power consumption transmitted from the power amount monitor 100, and may be data storing power consumption at predetermined second time intervals (eg, 5 minutes). The second power amount data may be based on a pulse signal for power usage received by the power amount monitor 100 from the power meter 20.

In addition, the monitoring server 200 further includes a time code calculation unit 230. The time code calculation unit 230 analyzes the first power amount data and the second power amount data to calculate a time difference between the power meter 20 and the power amount monitor 100. The timecode calculator 230 may compare the first power amount data and the second power amount data to calculate a time difference value having the smallest error therebetween.

The monitoring server 200 according to an embodiment of the present invention may further include a monitoring device time synchronization unit 240. The monitor time synchronization unit 240 may transmit a synchronization signal to the power amount monitor 100 to adjust the time of the power amount monitor 100 based on the calculated time difference value. By adjusting the time of the power amount monitor 100 based on the time difference value, the time of the power amount monitor 100 may be synchronized with the time of the power meter 20.

Alternatively, the time difference value may be used in the monitoring server 200 to update the second power amount data, which is data in which power usage of the power amount monitor 100 is stored. Information necessary for a demand response may be provided based on the updated second power amount data.

Hereinafter, a detailed configuration of the power amount monitor 100 will be described prior to describing a specific calculation method of the time code calculation unit 230.

The power amount monitor 100 may include a standard time receiver 110 and an interval synchronization unit 120. The standard time receiver 110 may be configured to receive a standard time from at least one of the management server 30, the monitoring server 200, and the communication base station by a network time protocol (NTP). Accordingly, the power amount monitor 100 may be synchronized to a standard time.

However, the power amount monitor 100 provided in an embodiment of the present invention needs to be synchronized with the time of the power meter 20 as well as the standard time. To this end, the interval synchronization unit 120 may receive an interval signal from the power meter 20 and synchronize the time of the power amount monitor 100 based on the interval signal. That is, the interval synchronization unit 120 may synchronize the time of the power amount monitor 100 to the nearest time among a plurality of times, which are a unit of the time interval of the interval signal when the interval signal is received.

4 is a diagram illustrating an example in which the time of the power amount monitor 100 is synchronized with the time of the power meter 20. In FIG. 4, it is assumed that the interval signal of the power meter 20 is generated every 15 minutes.

For example, when the time of the power meter 20 is 7 minutes 29 seconds slower than the standard time (Fig. 4 (a)), when the interval synchronization unit 120 of the power amount monitor 100 receives the interval signal ( At this time, the time of the power amount monitor 100 is 04:07:29) The time of the power amount monitor 100 may be adjusted.

Specifically, the power amount monitor 100 is the closest time of the plurality of times (04:00:00, 04:15:00), which is the nearest time of the plurality of times (04:00:00, 04:15:00) in which the time is the time interval of the interval signal when the interval signal is received It is possible to synchronize the time with the power meter 20 by adjusting the time of the power amount monitor 100 to 00:00. That is, the interval synchronization unit 120 delays the time of the power amount monitor 100 by 7 minutes and 29 seconds.

In addition, when the time of the power meter 20 is 7 minutes and 29 seconds earlier than the standard time (Fig. 4(b)), the interval synchronization unit 120 receives the interval signal (at this time, the The time is 04:07:31) The power monitor (100) is the closest time among a plurality of times (04:00:00, 04:15:00), which is the unit of the time interval of the interval signal. ) Time can be adjusted. That is, the interval synchronization unit 120 advances the time of the power amount monitor 100 by 7 minutes and 29 seconds.

However, when the time of the power meter 20 is 7 minutes 31 seconds slower or faster than the standard time (Fig. 4 (c) or (d)), when the interval synchronization unit 120 receives the interval signal (04: 07:31 or 04:07:29), the time of the wattage monitor 100 as the nearest time (04:15:00 or 04:00:00) among a plurality of times, each of which is a unit of the time interval of the interval signal Can be adjusted. That is, when the time of the power meter 20 differs from the standard time by 7 minutes and 31 seconds or more, the time of the power meter 20 and the time of the power amount monitor 100 have a difference in units of 15 minutes. The difference in units of 15 minutes may be corrected by the time code calculator 230.

Hereinafter, a specific calculation method of the timecode calculation unit 230 will be described. A case in which the power consumption data at 15 minute intervals is stored in the first power amount data and the power amount data at 5 minute intervals in the second power amount data is described as an example.

In the timecode calculator 230 according to the present embodiment, an error between the first power amount data and the second power amount data may be calculated by Equation 1 below.

In Equation 1 above, the power amount of the first power amount data is K , and the power amount of the second power amount data is C. And, since the first wattage data has a wattage value in units of 15 minutes, it has 96 wattage value data per day (t01 to t96), and the second wattage data has wattage values in units of 5 minutes, so 288 pieces per day It may have power amount value data of (t001 to t288).

In addition, the time code calculation unit 230 repeats the comparison of the power amount values of the first power amount data and the second power amount data corresponding to the shifted time value after shifting the time value of the second power amount data back and forth. can do. Here, the time unit shifted forward or backward is a longer one of the first time interval and the second time interval, and may be, for example, a first time interval.

In addition, the timecode calculator 230 may calculate a time difference value having the smallest error as a result value among repeated results. This operation process can be represented by Equation 2 below.

The time of the power amount monitor 100 may be synchronized with the power meter 20 based on the time difference value of the minimum error calculated by the process as in the above equation. At this time, it was exemplified that the interval between the time values of the first wattage data is 15 minutes and the time value of the second wattage data is 5 minutes, but the interval between the time values of the first wattage data and the second wattage data is a different value. Even in the case, it is possible to calculate the time code calculation unit 230 according to the present invention. That is, the interval between the time values of the second wattage data may be set among values smaller than the interval of the time values of the first wattage data, or the interval between the time values of the first wattage data is equal to the time value of the second wattage data. It can be set to be N times the interval (N is a natural number).

5A and 5B are diagrams illustrating data on the power usage of the power meter 20 and the power amount monitor 100 after synchronization is performed according to the process of FIG. 4. FIG. 5A is a case where the time of the power meter 20 and the power amount monitor 100 coincide with each other, and FIG. 5B is a case where the time of the power meter 20 and the power amount monitor 100 has a difference of 15 minutes.

For reference, even if synchronization is performed by the interval synchronization unit 120, a time difference as shown in FIG. 5B may occur. Accordingly, the time difference value may be calculated as 15 minutes by the operation of the time code calculation unit 230 according to the present embodiment, and the power amount monitor 100 based on the time difference value by the time synchronization unit 240 of the monitor Synchronization can be performed to delay the clock by 15 minutes.

According to an embodiment of the present invention, the time of the power meter may be synchronized with the time of the power meter by the power amount data of the power meter and the power amount data of the power meter. Accordingly, time synchronization using limited information generated from the power meter can be implemented. Accordingly, time synchronization can be conveniently performed without adding a device or a separate signal channel to the power meter.

Further, according to an embodiment of the present invention, the time of the power amount monitor may be synchronized with the time of the power meter by using an interval signal generated from the power meter and a pulse signal for power consumption. Since time synchronization can be performed based on a time unit of a preset interval signal, there is an advantage in that the amount of data for calculation can be saved.

6 is a flowchart illustrating a time synchronization method according to an embodiment of the present invention. 6, the time synchronization method according to an embodiment of the present invention, the time of the power meter 20, the power amount monitor 100 for receiving an interval signal and a pulse signal for power consumption from the power meter 20. A method of synchronizing the time of), comprising: receiving first power amount data (S330), receiving second power amount data (S340), calculating a time difference value (S350), and second power amount And adjusting the time value of the data or the time of the power amount monitor (S360).

In the step of receiving the first power amount data (S330), the first power amount data including the power amount value according to the time value is received from the power meter 20. In this case, the first power amount data may be received through the management server 30 connected to the power meter 20. The time value of the first power amount data may be based on the time of the power meter 20.

In the step of receiving the second power amount data (S340 ), the second power amount data including the power amount value according to the time value may be received from the power amount monitor 100. The time value of the second power amount data may be based on the time of the power amount monitor 100.

However, as illustrated in FIG. 6, the step S330 of receiving the first power amount data and the step S340 of receiving the second power amount data may be performed regardless of the order of each other. For example, the second power amount data may be first received from the power amount monitor 100, and then, the first power amount data may be received from the power meter 20. That is, the order in which the first power amount data and the second power amount data are received may be variously operated according to an embodiment of the present invention.

In the step of calculating the time difference value (S350), a time difference value having the smallest error in the amount of power between the first power amount data and the second power amount data may be calculated. At this time, by repeating the comparison of the wattage values corresponding to the time values of the first wattage data and the second wattage data after shifting the time value from the second wattage data, the shift value (time difference value) with the smallest error is obtained. Can be calculated. Here, the interval between the time values of the first power amount data may be N times the interval between the time values of the second power amount data (N is a natural number).

In the step of adjusting the time value of the second power amount data or the time of the power amount monitor (S360), the time value of the second power amount data is updated or the time of the power amount monitor 100 is adjusted based on the calculated time difference value. As a result, it can be synchronized with the power meter 20.

Further, the time synchronization method according to an embodiment of the present invention may further include adjusting the power amount monitor to a standard time (S310) and synchronizing the time of the power amount monitor to an interval signal (S320).

In the step of adjusting the power amount monitor to the standard time (S310), the standard time is received by the network time protocol (NTP) so that the power amount monitor 100 may be synchronized to the standard time. And, in the step of synchronizing the power amount monitor with the interval signal (S320), when the interval signal is received by the power amount monitor 100, a plurality of times in units of a time interval (for example, 15 minutes) of the interval signal The time of the power amount monitor 100 may be synchronized to the nearest time among them.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

10: surveillance system
20: power meter
30: management server
40: communication base station
100: wattage monitor
110: standard time receiver
120: interval synchronization unit
200: surveillance server
210: first receiver
220: second receiver
230: time code calculation unit
240: monitor time synchronization unit

Claims (11)

A monitoring server for synchronizing a time of a power meter with a time of a power amount monitor receiving an interval signal of a preset time interval and a pulse signal for power consumption from the power meter,
A first receiver configured to receive first power amount data including an power amount value according to a time value from a management server managing the power meter;
A second receiver configured to receive second power amount data including a power amount value according to a time value from the power amount monitor;
A time code calculator configured to calculate a time difference value having the smallest error between the first power amount data and the second power amount data; And
Winding time synchronization unit for transmitting a signal for adjusting the time to the power amount monitor based on the time difference value
Monitoring server comprising a.
The method of claim 1,
The first receiver receives the first power amount data every first time interval,
The second receiving unit is to receive the second power amount data every second time interval, monitoring server.
The method of claim 2,
The time code calculator shifts the time value of the second power amount data at the first time interval or the second time interval, and then the power amount value of the first power amount data and the second power amount data corresponding to the shifted time value To repeat the comparison of each other, the monitoring server.
The method of claim 2,
The interval between the time values of the first power amount data is the first time interval, the interval between the time values of the second power amount data is the second time interval,
The first time interval is N times (N is a natural number) of the second time interval, the monitoring server.
A method of synchronizing a time of a power meter and a time of a power amount monitor receiving an interval signal of a preset time interval and a pulse signal for power consumption from the power meter,
Receiving first power amount data including a power amount value according to a time value from a management server managing the power meter;
Receiving second power amount data including a power amount value according to a time value from the power amount monitor;
Calculating a time difference value having the smallest error between the first power amount data and the second power amount data; And
And adjusting a time value of the second power amount data or a time of the power amount monitor based on the time difference value.
The method of claim 5,
Time synchronization method further comprising the step of receiving a standard time by a network time protocol (NTP) and adjusting the power amount monitor to the standard time.
The method of claim 5,
Upon reception of the interval signal, synchronizing a time of the power amount monitor to a time closest among a plurality of times that are a unit of a time interval of the interval signal.
The method of claim 5,
In the step of receiving the first power amount data, the first power amount data is received every first time interval,
In the step of receiving the second power amount data, the second power amount data is received every second time interval.
The method of claim 8,
The step of calculating the time difference value,
After shifting the time value of the second power amount data at the first time interval or the second time interval, comparing the power amount values of the first power amount data and the second power amount data corresponding to the shifted time value with each other. It is to repeat, the time synchronization method.
The method of claim 8,
The interval between the time values of the first power amount data is the first time interval, the interval between the time values of the second power amount data is the second time interval,
The time synchronization method, wherein the first time interval is N times (N is a natural number) of the second time interval.
A computer program stored in a medium comprising a sequence of instructions for synchronizing a time of a power meter and a time of a power amount monitor receiving an interval signal of a preset time interval and a pulse signal for power usage from the power meter,
When the computer program is executed by a computing device,
Receiving first power amount data including an power amount value according to a time value from a management server managing the power meter,
Receives second power amount data including power amount values according to time values from the power amount monitor,
A time difference value having the smallest error between the first power amount data and the second power amount data is calculated,
A computer program stored in a medium comprising a sequence of instructions for adjusting a time value of the second power amount data or a time of the power amount monitor based on the time difference value.

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