KR20110131537A - Real time energy information display system - Google Patents

Abstract

According to the present invention, real-time energy information device obtains metering information through real-time communication based on smart meter and Zigbee communication, and provides real-time energy information display that provides various functions including a simulation function to consumers through the real-time energy information device. Disclosed is a system, the real-time energy information display system is equipped with a ZigBee device to measure the power usage to collect the load history data including the forward effective power amount, and in response to the transmission request the load history data through the ZigBee device A smart meter for transmitting the load history data; And a Zigbee coordinator, and performs the transmission request and the packet reception to the smart meter periodically through the Zigbee coordinator and refers to the data of the packet received in response to the transmission request, and the real-time power consumption information and the corresponding charges. And an energy information display device that provides information and obtains daily usage information and provides an expected usage information for this month.

Description

REAL TIME ENERGY INFORMATION DISPLAY SYSTEM}

The present invention relates to a real-time energy information display system, and more particularly, the real-time energy information device acquires the metering information by real-time communication based on smart meter and Zigbee communication, and includes the simulation function through the real-time energy information device as the acquired information. The present invention relates to a real-time energy information display system that provides various functions to consumers.

The power generated by the power plant is supplied to the customer through a distribution system including a transformer, and the customer is provided with a distribution box that receives power from the outside, that is, a distribution box connected to the lead wire, and the distribution box measures the power used by the customer. It is typically configured to have a function that includes a power meter and a breaker that shields the power supply in response to a short circuit occurring.

The amount of power per customer supplied to the above-described system by meter readers may be metered by periodic visits of customers. However, this conventional meter reading method has a problem of including a waste of manpower and a waste of money for customers using a small amount of electricity.

In order to solve this problem, a remote meter reading method has been proposed, but a remote meter reading is usually performed for a large-capacity consumer, and the current remote meter reading method requires a personal computer to be operated at all times because a personal computer-based inquiry system is operated. There is this.

In addition, since the above-described conventional meter reading method inquires simple historical data, a function of inquiring about the amount of power currently used may be provided, but a function for predicting and reducing electricity consumption in the future is not provided. Therefore, the conventional metering method has a problem in that it does not provide a proper means for inducing efficient power use.

Therefore, it is possible to develop a device capable of real-time meter reading for each customer, and to provide real-time analysis based on real-time metering and various analysis simulation functions.

An object of the present invention is to provide a real-time energy information display system that can provide a variety of simulation functions, such as real-time energy usage inquiry and estimated billing through the smart meter.

Another object of the present invention is to provide a real-time energy information display system that can calculate, statistics and analyze real-time energy consumption by operating an energy information display device that performs real-time communication based on a smart meter and Zigbee communication.

The real-time energy information display system according to the present invention is equipped with a ZigBee device to measure the power usage to collect load history data including a forward effective power amount, and in response to a transmission request, the load history data through the ZigBee device the load A smart meter for transmitting historical data; And a Zigbee coordinator, and performs the transmission request and the packet reception to the smart meter periodically through the Zigbee coordinator and refers to the data of the packet received in response to the transmission request, and the real-time power consumption information and the corresponding charges. And an energy information display device that provides information and obtains daily usage information and provides an expected usage information for this month.

Here, the communication protocol of the Zigbee coordinator may include a header indicating the start and address of the packet, a tail indicating the type of the packet, and a data unit, and the data unit may include instructions, length, and error check information.

The command is a combination of join information for inquiring whether the Zigbee communication is connected, forward active power, reverse active power, date of occurrence, load history data providing status information, meter and meter information providing meter information collection, data during communication disconnection It may include missing load history data collection for information collection, history data provided with power failure and recovery information, previous month data for obtaining previous month's bill information, and current month data items which are usage and fee information from the date of the meter reading to the present.

When the load history data is missing from the packet, the ZigBee coordinator selects one of the missing data collection method using the load history time, the missing data collection method using the load history index, and the total load history data collection method for 90 days. Data reception can be performed.

In addition, the expected usage information for the current month may be calculated by measuring current power usage to derive daily usage from the meter reading base date to the present day and calculating the remaining period using the daily usage.

Here, the amount of power per hour may be calculated based on the current power consumption, and the amount of power per hour may be calculated as (a meter constant of forward effective power amount / meter for one hour).

The current power usage may be calculated by subtracting the total cumulative data of the previous month from the current month data.

And, the smart meter, a metering unit for measuring the power use; A communication modem including the Zigbee device and interfacing with the metering unit to perform Zigbee communication of the load history data corresponding to the transmission request; And a power supply unit providing power to the metering unit and the communication modem.

The smart meter may include a display that provides a user interface using a touch pad; A memory for storing data acquired from the smart meter and an analysis algorithm using the data; A speaker for outputting voice information; A communication modem including the Zigbee coordinator and performing the transmission request and receiving a packet transmitted from the smart meter accordingly; Controls the transmission request and the packet reception to the smart meter periodically through the communication modem including the Zigbee coordinator and with reference to the data of the packet received in response to the transmission request and the real-time power information Provide daily usage information, provide current usage information to the display, and perform a control corresponding to an operation signal input by an operation of the user interface, and display the control result among the display and the speaker. Central control unit for outputting at least one; And a power supply unit supplying power required for each unit.

Here, the central control unit may further display the carbon dioxide information per unit power used and the energy use efficiency grade on the display.

According to the present invention, since it can provide various simulation functions such as real-time energy usage inquiry and estimated billing inquiry through a smart meter, it can provide not only current usage but also information on forecasted usage, thereby providing efficient information to consumers. There is an effect that can lead to energy savings.

According to the present invention, by operating an energy information display device that performs real-time communication based on a smart meter and Zigbee communication, a real-time to a consumer at a remote location in a smart meter that measures power usage according to calculation, statistics, and analysis of real-time energy usage. There is an effect that can provide a variety of information based on the power usage.

1 is a schematic diagram of an embodiment of a real time energy information display system according to the present invention;
2 is a detailed block diagram of the embodiment of FIG.
3 is a usage fee analysis service screen provided according to an embodiment of the present invention.
4 is a screen illustrating an example of a guide screen implemented in an embodiment.

Hereinafter, a preferred embodiment of a real-time energy information display system according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the real-time energy information display system according to the present invention includes an energy information display device 10 and a smart meter 30, and the energy information display device 10 uses a Zigbee coordinator 10a. The smart meter 30 has a Zigbee device 30a.

The energy information display 10 is a device that displays energy information obtained from the smart meter 30 to the consumer in real time, and the smart meter 30 measures the amount of power supplied to the consumer to save energy. It is a device for transmitting to the information display device 10.

The Zigbee coordinator 10a models a logical master concept and is included in a communication modem 18 to be described later for Zigbee communication. The Zigbee device 30a models a logical slave concept and will be described later for Zigbee communication. Included in the communication modem 34.

Zigbee communication refers to a wireless networking technology based on one of the IEEE 802.15.4 standards supporting near field communication. Zigbee communication can be used as a technology for near field communication and ubiquitous computing of about 10M to 20M. In addition, an embodiment according to the present invention may be implemented to perform real-time energy information display and energy information transmission using a Zigbee modem applying the SEP (Smart Energy Profile) 1.0 standard, which is an international standard of Zigbee alliance.

A more detailed configuration of the real-time energy information display system of FIG. 1 may be implemented as a block diagram as shown in FIG. 2.

The energy information display device 10 equipped with the Zigbee coordinator 10a periodically performs the transmission request and packet reception to the smart meter 30 through the Zigbee coordinator 10a and transmits data of the packet received in response to the transmission request. With reference, real-time power consumption information and corresponding charge information are provided, and daily usage information is obtained to provide the expected usage information for this month.

For this purpose, the energy information display device 10 includes a central controller 12, a memory 14, an auxiliary memory 16, a communication modem 18, a display 20, a speaker 22, and a power supply unit 24. .

The display 20 provides a user interface using a touch pad, the memory 14 stores data acquired from the smart meter 30 and an analysis algorithm using the same, and the speaker 22 outputs voice information and communicates. The modem 18 includes a Zigbee coordinator 10a and performs a transmission request and correspondingly receives a packet transmitted from the smart meter 30, and the central controller 12 periodically smarts through the communication modem 18. Controls the meter 30 to perform transmission request and packet reception, provides real-time power consumption information and corresponding charge information by referring to data of packets received in response to the transmission request, and obtains daily usage information to estimate the current month. A control corresponding to an operation signal inputted by an operation of the user interface of the display 20 by providing usage information to the display 20 Carried out, and outputs the control result to one of the at least one display 20 and the speaker 22, a power supply unit 24 supplies necessary power to each unit.

Here, the display unit 20 is preferably configured to include a touch pad that is linked to the user interface provided by the central control unit 12 to drive the program stored in the memory 14, the communication modem 18 is described above It comprises a Zigbee coordinator (10a) and performs communication using a protocol for Zigbee communication, the memory 14 is preferably configured using a nonvolatile memory, such as SDRAM, the auxiliary memory 16 is USB or SD It can be used as an external interface such as, the power supply unit 24 may be composed of a device or a battery for converting a commercial power supply to supply a DC voltage.

In addition, the smart meter 30 equipped with the ZigBee device 30a collects the load history data including the amount of forward active power by measuring the power usage, and loads the load history data through the ZigBee device 30a in response to the transmission request. A zigbee communication unit 34 which transmits load history data and transmits the metering unit 32 to measure the amount of power supplied to the customer and the measured amount of power through Zigbee communication in response to a request for transmission of the energy information display device 10; And a power supply unit 36 for supplying power required for the metering unit 32 and the Zigbee communication unit 34. Here, the power supply unit 36 may be configured as a device or a battery for converting a commercial power supply to supply a DC voltage.

According to the embodiment of the present invention configured as described above, the usage fee analysis service as shown in FIGS. 3 and 4 may be implemented, and the following function is described below. The control may be performed by a user interface tm operation of a user through the display 20 and the program and data stored in the memory 14.

ZigBee communication according to the present invention transmits data through periodic parsing from the ZigBee device 30a, that is, the communication modem 34, to the ZigBee coordinator 10a, that is, the communication modem 18, and the periodic parsing is performed according to the manufacturer's intention. The energy information display device 10 may store the processed data in the form of a database or a file in the memory 14 through a data wave. And the stored data is periodically read and processed into a desired form (time, day, month, yearly) as shown in FIG. 3 or 4 and displayed on the display 20 or notified by audio through the speaker 22. .

The communication protocol between the ZigBee device 30a and the ZigBee Coordinator 10a may include a header indicating the start and address of the packet, a tail indicating the type of the packet, and a data part. The data part may include instructions, lengths, and error check information. have.

In addition, the command collects load history data providing join information, forward active power, reverse active power, generation date, and status information for inquiring whether the Zigbee communication is connected, instrument information collection for providing meter and meter information, and communication disconnection. It may include missing load history data collection for data information collection, history data provided with power failure and recovery information, previous month data for obtaining previous month's charge information, and current month data items which are usage and fee information from the date of the meter reading to the present.

The embodiment according to the present invention assumes that data is parsed every 15 minutes, and the present invention includes the current month data item in the real-time electricity bill calculation, and the current usage included in the current month data is "total usage-of the smart meter 30." Last month's data ". In addition, daily usage information may be obtained by calculating current usage information as usage / days, and an estimated usage may be calculated this month by calculating the daily usage information to the remaining period.

The power consumption per hour (kWh), which is the basis of daily usage information, can be calculated as "meter of constant active power / smart meter per hour", and the embodiment is acquired at the time of parsing because data is parsed every 15 minutes. Since the amount of forward active power used is 15 minutes, the amount of forward active power per hour in the embodiment may be obtained by multiplying by four. Here, the instrument constant means a disk rotation speed that is installed for power measurement in the metering unit 32 of the smart meter as a normal constant value.

As described above, the real-time electricity bill estimating method can prevent a fatal error of the system, and the fatal error is missed if it becomes difficult to transmit load history data that provides energy use information for 15 minutes due to a failure and power failure of the communication modem. The data included includes errors in electricity tariffs and the possibility of introducing errors in usage analysis and forecasting future usage.

In the present invention, since the load history data can also be provided in the form of graphs and texts on the display 20 for 15 minutes to analyze statistics (hour, day, month, yearly) of existing data, data acquisition for statistics and analysis can be performed. need. If the load history data is missing, statistics and analysis are performed using any of the missing data collection method using the load history time of the load history data, the missing data collection method using the load history index, and the total load history data collection method for 90 days. Data can be supplemented for

Among them, the missing data collection method using the load history time checks whether the data is received per load history time and, if the load history data is missing, requests the corresponding load history time and receives the data. This can be useful when missing.

The missing data collection method using the load history index recognizes the load history index by receiving the most recent load history data when the top load history index is requested by applying the load history index in addition to the load history time received every 15 minutes. By knowing the top load history index, the number of received load history is known, and then, whether the missing data exists in the upper index or the lower index by dividing through the intermediate value search. As a specific example of this, if 100 load history indexes exist, first search by the 50th index number to determine whether they correspond to the upper index or the lower index. Determine if it corresponds to the subindex. Thereafter, the above-described method may be repeatedly performed until the missing data is found, which may be useful when there is a medium load history data drop and a continuous load history data drop.

In addition, a method of requesting load history data and receiving it individually, that is, a method of requesting 90 days of load history data of a smart meter at once and storing them in a database or a file at once, may be useful when a large amount of load history data is missing. That's how it can be.

According to the embodiment of the present invention, when load history data is missing due to a failure and a power failure of a communication modem, data necessary for statistics and analysis may be obtained by supplementing the data by the above-described method.

As described above, the usage fee analysis service may be performed through the screen as shown in FIG. 3, and FIG. 3 illustrates that information including the current rate, the current month's estimated rate, and the current progressive stage is displayed.

In addition, as shown in FIG. 3, a price comparison and alarm setting function may be provided in the user interface. If the fee comparison function is selected by the user, the previous month's fee or the same month's bill may be displayed compared to the current fee and the current month's estimated fee. When the alarm setting function is selected by the user, the maximum charge and the target amount and the progressive stage setting environment may be provided, and the notification contents when the target value is exceeded by the progressive stage setting are displayed in a pop-up window as shown in FIG. 4 or the speaker 22 is displayed. It can provide a voice service through.

On the other hand, the real-time energy information display system according to the present invention can be used for the purpose of analyzing the usage pattern by using the 15-minute load history data as daily hourly data, separately for the monthly amount and charge portion that is closely related to the electricity bill As described above, the algorithm for calculating a fee using the current month data and the previous month data can be applied.

Currently used meter readers display power consumption from 1st to 3rd digits after the decimal point. Therefore, when accumulated for several years, a problem may occur in the reliability of the settled fee. However, if the present month and the current month data in the present month data is subtracted and displayed as the current usage, it is possible to always provide an accurate amount of usage, where the total data of the previous month may be set to the value obtained at the last 00 of the meter reading date.

The measurement of the forecasted usage derives daily usage from a meter reading date to a certain period of time, and calculates the calculated daily usage by calculating the elapsed period, so that the sample range is gradually increased, so that the closer to the end date of the reading, the closer to the actual usage amount. do. That is, for example, if the meter reading date (assuming 1 month unit) is 1 day to 30 days, the current amount can be measured through the current power usage measuring method described above, and thus the daily usage can be derived as the 10-day usage. have. The predicted usage can be obtained by multiplying the remaining days by the daily usage derived as described above. As the estimated usage calculated as described above approaches 30 days (assuming that the current month is 30 days), the actual usage amount is approximated.

As described above, the power consumption, the current rate corresponding to the current rate, and the current monthly rate may be calculated and displayed by the energy information display device 10 based on data parsed by the smart meter 30.

Here, the energy information display device 10 may additionally perform a carbon dioxide measurement amount display function. The CO2 measurand display function can display the carbon dioxide information corresponding to the amount of use by applying the amount of carbon dioxide of 0.424Kg per kWh, and the carbon dioxide information also displays the amount of pine trees to be planted accordingly, thereby helping consumers to save power. In addition to making it visually appealing, CO2 information can be classified into energy use efficiency levels and operated in the same way as above, middle and low.

The energy information display device 10 according to the present invention can be manufactured in a portable form in consideration of the above-described functions as well as being disposed at a position that can be always checked by the consumer, and has a built-in player function that can play music files. There is an advantage to realize various service implementations.

10: energy information display device 10a: Zigbee coordinator
12: central control unit 14: memory
16: auxiliary memory 18, 34: communication modem
20: display 22: speaker
24, 36: power supply unit 30: smart meter
30a: Zigbee device 32: metering unit

Claims (10)

A smart meter equipped with a Zigbee device to collect power history data to collect load history data including a forward effective power amount and to transmit the load history data through the Zigbee device in response to a transmission request;
Equipped with a Zigbee coordinator and performs the transmission request and packet reception to the smart meter periodically through the Zigbee coordinator, and real-time power consumption information and corresponding charge information by referring to the data of the packet received in response to the transmission request Real-time energy information display system comprising; and an energy information display device for providing the current usage information by acquiring daily usage information.
The method of claim 1,
The communication protocol of the Zigbee coordinator includes a header indicating the start and address of the packet, a tail indicating the type of the packet, and a data portion, wherein the data portion includes instructions, length, and error check information.
The method of claim 2,
The command is a combination of join information for inquiring whether the Zigbee communication is connected, forward active power, reverse active power, date of occurrence, load history data providing status information, meter and meter information providing meter information collection, data during communication disconnection Real-time energy information display, including missing load history data collection for information collection, historical data receiving power failure and recovery information, previous month data acquisition of previous month's charge information, and current month data items which are usage and charge information from meter date system.
The method of claim 1,
The Zigbee coordinator performs any one of a missing data collection method using a load history time, a missing data collection method using a load history index, and a total load history data collection method for 90 days in response to missing load history data in the packet. Real-time energy information display system to perform data reception.
The method of claim 1,
The current month's estimated usage information is a real-time energy information display system for calculating the current power consumption to derive daily usage from the meter reading base date to the present day and calculating the remaining period using the daily usage.
The method of claim 5, wherein
And calculating the amount of power per hour based on the current power consumption, and calculating the amount of power per hour as (a meter constant of forward effective power amount / meter for one hour).
The method of claim 1,
The current power consumption is a real-time energy information display system that calculates by subtracting the total cumulative data of the previous month from the current month data.
The method of claim 1, wherein the smart meter,
A metering unit for metering power usage;
A communication modem including the Zigbee device and interfacing with the metering unit to perform Zigbee communication of the load history data corresponding to the transmission request; And
Real-time energy information display system comprising a; power unit for providing power to the meter and the communication modem.
The method of claim 1, wherein the smart meter,
A display providing a user interface using a touchpad;
A memory for storing data acquired from the smart meter and an analysis algorithm using the data;
A speaker for outputting voice information;
A communication modem including the Zigbee coordinator and performing the transmission request and receiving a packet transmitted from the smart meter accordingly;
Controls the transmission request and the packet reception to the smart meter periodically through the communication modem including the Zigbee coordinator and with reference to the data of the packet received in response to the transmission request and the real-time power information Provide daily usage information, provide current usage information to the display, and perform a control corresponding to an operation signal input by an operation of the user interface, and display the control result among the display and the speaker. Central control unit for outputting at least one; And
Real-time energy information display system comprising; a power supply unit for supplying the power required for each of the units.
The method of claim 9,
The central control unit is a real-time energy information display system that further displays on the display the carbon dioxide information and energy use efficiency rating per unit power used.

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