KR20190122103A - System for metering electrical energy and method for electrical energy display metering value - Google Patents

Abstract

Disclosed are a system for measuring electric energy and a method for displaying the measured amount of electric energy. According to the present invention, the system comprises: a plurality of branch measuring instruments for measuring electric energy of a plurality branch distribution lines branched from a main distribution line, separately; at least one main measuring instrument for measuring the electric energy of the main distribution line and outputting information on the measured amount of the main distribution line and information on the measured amount separately measured by the branch measuring instruments; and a display device for receiving the information on the measured amount separately measured by the main measuring instrument and the branch measuring instruments and displaying each information on the measured amount of the main and branch measuring instruments, information on the totally summed measured amount, and information on the summed measured amount of the grouped branch measuring instruments. Accordingly, the measuring instruments formed on each of the branched distribution lines are selectively grouped and an electric energy measured amount of the grouped measuring instruments is divided for each group to be displayed.

Description

SYSTEM FOR METERING ELECTRICAL ENERGY AND METHOD FOR ELECTRICAL ENERGY DISPLAY METERING VALUE}

The present invention relates to an electric energy measuring system and a method for displaying electric energy measured values for selectively grouping a plurality of meters configured in each branched distribution line, and for displaying the electric energy measured amounts of the grouped meters by group. will be.

In general, power distribution devices such as distribution boards, distribution boards, and distribution boards are installed in power receiving stations where power systems are distributed, and dominate distribution systems and distribute power to power consumption systems. To this end, each switchgear may be provided with a variety of switchgear, breaker, meter, etc. to perform power transformation, opening and closing, safety, metering.

Among them, the distribution panel is a power distribution device that distributes the power drawn from the power system, etc. to the load connected to each through a molded case circuit breaker (MCCB).

In detail, the distribution panel branches and transmits grid power to a load-consuming load side, and measures electric energy transmitted to the load by using a meter configured on each branched distribution line. At the same time, in the distribution panel, when power is leaked from the load or an overcurrent / overvoltage occurs, the distribution line is controlled by tripping the circuit breakers for individual wiring.

In the distribution panel according to the related art, electric energy transmission information measured at each relay, for example, power information such as power amount, voltage, and current amount, is separately displayed or summed and displayed as integrated information only. In other words, each instrument displays power information such as the amount of power, voltage, and current measured on each distribution line individually, and sums the amount of power, voltage, and current measured in all relays through a specific distribution panel monitor. The summation information was displayed. The total sum of power information is provided to a power management agency such as a power exchange, so that the overall electric energy usage is managed.

However, in the distribution panel or the distribution system according to the prior art, since the manager could check the power information supplied to each load only through the respective instruments, the amount of power provided to the distribution lines or loads branched in different spaces or in different directions. There was a difficult problem to manage.

In addition, in the related art, since the manager could check only the sum of power information measured by all relays in addition to the power information of individually configured instruments, it is difficult to separately manage the power amount of loads in a specific space or loads connected to each other. There was a problem of this deterioration.

The present invention is to solve the above problems, and to selectively group a plurality of measuring instruments configured in each branched distribution line, the electrical energy measurement so that the electrical energy measurement amount of the grouped instruments can be summed and displayed for each group It is a technical problem to provide a system and an electric energy measured amount display method.

Electrical energy measuring system according to an embodiment of the present invention for solving the above technical problem is a plurality of branch measuring instruments for measuring the electrical energy of a plurality of branch distribution line branched from the main distribution line, the electrical energy of the main distribution line At least one main measuring instrument for outputting the measured quantity information of the main distribution line and the measured quantity information from the plurality of branch measuring instruments, and the measured amount information of each of the at least one main measuring instrument and the plurality of branch measuring instruments And a display device configured to receive the received information and display the measured amount information of each of the main and branch measuring instruments, the total summed measurement information, and the summed measurement information of the grouped branch measuring instruments.

In addition, the at least one main measuring unit performs RS communication (Recommended Standard Revision) in the form of a combination of serial, parallel, or parallel / parallel with a plurality of branch measuring instruments and display devices, thereby measuring the measured amount information of the main distribution line and the plurality of branches. The measured amount information measured from the measuring instrument is transmitted to the display apparatus.

In addition, the display device provides an application screen for selecting and grouping each branch measuring instrument through the display panel, and the measurement amount information of each of the main and branch measuring instruments and the sum of the main and branch measuring instruments are added to the relay display or the display panel screen of the main relay. The measured metrology information and the aggregated metrology information of the grouped branch instruments.

The application includes a group add menu for selectively grouping each branch instrument, a group information input toolbar including an added group name, and a group ID, at least one branch instrument selection menu to be included in at least one group, It supports a branch information input toolbar including a name of each branch measuring instrument included in at least one group, and a branch measuring unit ID.

Also, the application program includes a group-specific information display unit for dividing and displaying aggregated metrology information of branch instruments grouped into at least one group for each group, and instrument-specific information for dividing and displaying measurement unit information of each of main and branch instruments. The display unit supports a full-capacity display unit displaying total aggregated measurement information of the main, branch, and meter.

The main instrument analyzes the electrical energy measurement information of the main distribution line to determine the overcurrent, overvoltage, overload and power failure errors of the main distribution line, and when the error is determined, controls the main breaker trip of the main distribution line to control the power of the main distribution line. Block it. Each branch meter analyzes the electrical energy measurement information of the branch distribution line to determine the overcurrent, overvoltage, overload, and power failure errors of the branch distribution line. Cut off the power.

The display device supports selecting and grouping each branch meter through an application program screen or reads group information of each branch meter belonging to each grouped in advance. Then, the measured measurement information is received from the main measuring instrument and the plurality of branch measuring instruments, respectively, and according to the group information, the measuring information of each of the main and branch measuring instruments, the total summed measuring information, and the combined measuring information of the grouped branch measuring instruments. Is detected, and the detected measurement information is displayed on the display screen.

In addition, the method for displaying an electrical energy measurement amount according to an embodiment of the present invention for solving the above technical problem is to support the selection and grouping of at least one branch meter through the application screen, pre-grouped Reading group information of each branch measuring instrument belonging to each group, measuring electrical energy of a main distribution line into which system power is entered through a main measuring instrument, and a plurality of branches branched from the main distribution line through a plurality of branch measuring instruments Measuring electrical energy of the branch distribution line, respectively, and receiving measured quantity information respectively from the main measuring instrument and the plurality of branch measuring instruments to measure the measured quantity information of each of the main and branch measuring instruments, the total summed measuring information, and the grouped Displaying aggregated metrology information of branch meters.

The displaying of the measured quantity information may be performed by RS communication using a display device in series, parallel, or serial / parallel combination with the main measuring instrument and the plurality of branch measuring instruments. Receive measurement information. The total sum of power information is transmitted to a power exchange, SCADA, or a predetermined power management agency.

In addition, the step of displaying the measurement information information includes providing an application screen for selecting and grouping each branch measuring instrument through the display panel, and relaying each of the main and branch measuring instruments to the relay display or the display panel screen of the main relay. Displaying the survey information, the total summed metrology information, and the aggregated metrology information of the grouped branch meters.

In addition, the displaying of the measurement information may include displaying the divided measurement information of each of the branch measuring instruments grouped into at least one group by group, dividing and displaying the measurement information of each of the main and branch measuring instruments; Displaying total aggregated metrology information of the main and branch meters.

In addition, the electric energy measurement amount display method is the step of analyzing the electrical energy measurement information information of the main distribution line using the main measuring instrument, to determine the overcurrent, overvoltage, overload and power failure error of the main distribution line, the main distribution line at the time of error determination Controlling the main breaker trip of the main circuit to cut off the power of the main distribution line, analyzing the electrical energy measurement information of the branch distribution line by using each branch meter, and overcurrent, overvoltage, overload and power failure errors of the branch distribution line. The method may further include controlling the branch breaker trip of the branch distribution line to cut off the power of the branch distribution line when the error is determined.

As described above, the electric energy measuring system and the electric energy measuring amount display method according to the embodiment of the present invention having various technical features enable the selective grouping of a plurality of instruments configured in each branched distribution line, and the grouped measuring instruments. Their electrical energy measurements can be summed and displayed for each group.

Accordingly, the present invention can assist the administrators to easily check the measured amount sum information of the grouped instruments, the measured amount sum information of all the instruments, and the like, in addition to the electric energy measured quantity information measured by each of the independent instruments.

In addition, the present invention allows the management to monitor the measurement information of each instrument, the total measurement information of the grouped instruments, and the total measurement information of all the instruments with a single instrument or display device, thereby providing overall electrical energy management Can improve the accuracy and efficiency.

1 is a block diagram showing an electrical energy measurement system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a group setting method for selectively grouping a plurality of branch meters illustrated in FIG. 1.
3 is a diagram illustrating a program setting method for selectively grouping a plurality of branch meters illustrated in FIG. 1.
FIG. 4 is a diagram illustrating electrical energy measurement information displayed through the main measuring device or the display device of FIG. 1.
5 is a flowchart for sequentially describing an electric energy measuring method and a measured amount displaying method according to an exemplary embodiment of the present invention.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, and thus, those skilled in the art may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

EMBODIMENT OF THE INVENTION Hereinafter, the electrical energy measurement system and the electrical energy measurement amount display method of this invention are demonstrated.

1 is a block diagram showing an electrical energy measurement system according to an embodiment of the present invention.

As shown in FIG. 1, the electric energy measuring system includes a main measuring instrument (MR), a plurality of branch measuring instruments SR1 to SRn, a main circuit breaker (MCB), and a plurality of branch breakers (CB). Circuit Breaker), and a display device (DSD, Display Decice).

The main meter (MR) measures the electrical energy of the main distribution line into which the grid power is input. The main meter MR may be configured as a digital power meter that measures the voltage and current of the distribution line and calculates the amount of power using a micro controller unit (MCU).

The main measuring instrument (MR) measures the amount of power by measuring the voltage and current of the main distribution line output through at least one current transformer / transformer, and stores the measured voltage, current, and amount of the main distribution line together with the operating parameters. . The measured voltage, current, and power amount of the main distribution line are transmitted to the display device DSD in real time.

In addition, the main measuring instrument MR analyzes the electric energy measured quantity information (electric energy measured quantity information) of the main distribution line to determine the overcurrent, overvoltage, overload, and power failure error of the main distribution line. Here, when the overcurrent, overvoltage, overload and power failure errors are determined, the main breaker (MCB) trip of the main distribution line is controlled to cut off the power of the main distribution line.

The measured quantity information respectively measured by the main measuring instrument MR and the plurality of branch measuring instruments SR1 to SRn is received and collected in real time, and transmitted to the display device DSD of the monitoring control organization SCADA.

The plurality of branch measuring instruments SR1 to SRn are configured to be electrically connected to the plurality of branch distribution lines branched from the main distribution line, respectively. The plurality of branch measuring instruments SR1 to SRn respectively measure electric energy transmitted to each branch distribution line electrically connected.

Specifically, each of the branch meters SR1 to SRn may also be configured as a digital power meter that measures the voltage and current of each distribution line and calculates the amount of power. Each of the branch measuring instruments SR1 to SRn measures the amount of power by measuring the voltage and current of the branch distribution line output through each current transformer / modulator, and measures the voltage, current, and amount of the measured branch distribution line by operating parameters. Save with. At this time, the voltage, current, and power amount of the branch distribution lines measured by the respective branch measuring instruments SR1 to SRn are transmitted to the display device DSD in real time.

In addition, each branch measuring instrument SR1 to SRn analyzes electrical energy measurement information (electric energy measurement information) of the branch distribution line electrically connected to determine overcurrent, overvoltage, overload, and power failure error of the branch distribution line. . Here, when determining the overcurrent, overvoltage, overload and power failure error, the branch breaker (CB) trip of the branch distribution line is controlled to cut off the power of each branch distribution line.

The main instrument MR performs RS communication (Recommended Standard Revision) in the form of a combination of serial, parallel, or parallel / parallel with the plurality of branch measuring instruments SR1 to SRn and the display device DSD. In this way, the main measuring instrument MR communicates with the plurality of branch measuring instruments SR1 to SRn and the display device DSD in a manner such as RS232 RS232C and RS485, thereby measuring the measured quantity information of the main distribution line that is self-measured and The measured quantity information measured from the branch measuring instruments SR1 to SRn can be transmitted to the display device DSD.

The display device DSD is provided at a power exchange, a supervisory control and data acquisition (SCADA), or a preset power management institution, and may be configured as a personal computer (PC). The display device DSD may receive and display, in real time, the measured quantity information from each of the at least one main measuring instrument MR.

The display device DSD supports an administrator to selectively group the plurality of branch meters SR1 to SRn. The display device DSD receives the measured amount information measured by the main measuring instrument MR and the plurality of branch measuring instruments SR1 to SRn in real time. In addition, the display device DSD may store the measured metrology information of each of the received main and branch measuring instruments MR, SR1 to SRn, the total summed measurement information, and the summed measurement information of the grouped branch measuring instruments SR1 to SRn. Displays full screen or split screen respectively.

The display device DSD screens the received measurement information of each of the main and branch measuring instruments MR, SR1 to SRn, the total summed measurement information, and the summed measurement information of the grouped branch measuring instruments SR1 to SRn. Indicated by.

Accordingly, the power management institution may monitor the total amount of power information in a specific space, area, or facility to manage power consumption of the space or area.

FIG. 2 is a diagram illustrating a group setting method for selectively grouping a plurality of branch meters illustrated in FIG. 1. FIG. 3 is a diagram illustrating a program setting method for selectively grouping a plurality of branch meters illustrated in FIG. 1.

2 and 3, the display device DSD provides an application program screen for selecting and grouping the branch meters SR1 to SRn through a separate touch monitor or display panel. Accordingly, the administrator may set each group Gn and Gn + 1 through the program coding screen of the application program and selectively include branch meters SR1 to SRn in each group Gn and Gn + 1. .

In detail, an application group screen displays a group addition menu for setting the at least one group information to selectively include each branch measuring device SR1 to SRn in each group Gn and Gn + 1. . In addition, a group information input toolbar is displayed for inputting group information including a name and a group ID for each added group after the group is added.

The application program screen also supports a meter selection menu for selecting at least one branch gauge SR1 to SRn to be included in each of the at least one group Gn. As such, after selecting at least one branch measuring instrument SR1 to SRn to be included in each group Gn and Gn + 1, the branch measuring instruments SR1 to SRn respectively included in each group Gn and Gn + 1 are selected. A branch information input toolbar is displayed on the screen for allowing branch information including the name of each item) and the branch information including IDs of the branch measuring instruments SR1 to SRn to be input.

Through the application screen supported sequentially or as one screen, the administrator sets and stores at least one group (Gn, Gn + 1) and group information, and then assigns each group to each group (Gn, Gn + 1). At least one branch measuring instrument SR1 to SRn to be included may be set.

Accordingly, the display device DSD receives the measured quantity information measured by the main measuring instrument MR and the plurality of branch measuring instruments SR1 to SRn in real time, and the display apparatus DSD receives the received main and branch measuring instruments MR. , The measurement information of each of the SR1 to SRn, the total sum of the measurement information, and the total measurement information of the grouped branch measuring devices SR1 to SRn are displayed on the full screen or the split screen, respectively.

FIG. 4 is a diagram illustrating electrical energy measurement information displayed through the main measuring device or the display device of FIG. 1.

As shown in FIG. 4, the measurement amount information of each of the main and branch measuring instruments MR and SR1 to SRn is displayed on the relay amount display unit of the main relay MR or the display panel screen of the display device DSD. Survey information and aggregated metrology information of the grouped branch meters SR1 to SRn may be separately displayed in graph form.

When the metrology information of each of the main and branch measuring instruments MR, SR1 to SRn, the total summed measurement information, and the summed measurement information of the grouped branch measuring instruments SR1 to SRn are represented in the form of a graph, the administrator may respectively You can check the changes in the amount of power information measured in real time.

On the other hand, the application program screen of the display device DSD includes the measurement information of each of the main and branch measuring instruments MR, SR1 to SRn, the total summed measurement information, and the grouping of the branch measuring instruments SR1 to SRn. The measurand information can be displayed in numerical form.

For example, as shown in Table 1 below, the application program screen of the display device DSD may be displayed in a manner in which the measurement information of each of the main and branch measuring instruments MR, SR1 to SRn are listed. .

TABLE 1

In other words, when the main and branch measuring instruments MR and SR1 to SRn are not grouped, the measurement information of each of the main and branch measuring instruments MR and SR1 to SRn may be separately divided and displayed in order. .

On the other hand, as shown in Table 2, when the specific branch measuring instruments (MR, SR1 to SRn) are grouped into a plurality of groups (G1 to G4), the specific branch measuring instruments (MR, grouped by each group G1 to G4) Summed measurement information of the SR1 to SRn) is displayed. In addition, the measured amount information measured by the main measuring instruments MR and the branch measuring instruments SR3 to SR7 that are not grouped are also displayed in order.

TABLE 2

Since the manager can immediately check the summed measurement information of the branch measuring instruments MR, SR1 to SRn grouped by the preset groups G1 to G4, as well as the individual measuring instruments. The amount of power for the branch meters MR, SR1 to SRn of the corresponding group may be separately managed for each specific space or region.

To this end, on the application screen of the display device DSD, a group information display unit for dividing and displaying the aggregated measurement information of the branch measuring instruments SR1 to SRn grouped into at least one group Gn for each group is separately provided. Can be distinguished. And an information display unit for each of the measuring instruments MR, SR1 to SRn, which divides and displays the measured quantity information of each of the main and branch measuring instruments MR, SR1 to SRn, and the total sum of the main and branch measuring instruments MR, SR1 to SRn. The full capacity display unit for displaying the measured amount information may be separately displayed.

5 is a flowchart for sequentially describing an electric energy measuring method and a measured amount displaying method according to an exemplary embodiment of the present invention.

Referring to FIG. 5, first, the display apparatus DSD reads group information of each branch measuring instrument SR1 to SRn belonging to a group grouped in advance from a preset memory.

If the grouping information previously grouped is not set or needs to be corrected, each branch measuring device SR1 to SRn may be selected and grouped through an application program screen. In this case, an application program screen is provided to select and group the respective branch meters SR1 to SRn through a separate touch monitor or display panel. Through the provided application screen, the administrator sets and stores at least one group Gn and Gn + 1 and group information, and then includes at least one branch to be included in each group Gn and Gn + 1, respectively. The measuring instruments SR1 to SRn can be set. (ST1)

In the case where the group-specific information is read or set, the display device DSD receives the measured amount information measured by the main measuring instrument MR and the branch measuring instruments SR1 to SRn in real time. If the reception is not completed, the measurement information is sequentially received up to the unreceived measuring instruments. (ST2)

When receiving the measurement amount information from the plurality of branch measuring instruments SR1 to SRn, respectively, it is preferable to check whether each of the branch measuring instruments SR1 to SRn is grouped (ST3), and to receive them by group (ST4). Accordingly, the measured quantity information measured from the grouped specific branch measuring instruments SR1 to SRn may be added to the respective measured group information.

On the other hand, the measured quantity information measured by the branch measuring instruments SR1 to SRn in the ungrouped state is stored and managed separately (ST6). By the above process, when the measurement information is received from the grouped branch measuring instruments SR1 to SRn and the branch measuring instruments SR1 to SRn in the ungrouped state, the measured quantity information is separately stored. ST7) In this case, the display apparatus DSD may include the measurement information of each of the received main and branch meters MR, SR1 through SRn, the total summed measurement information, and the sum of the grouped branch meters SR1 through SRn. Separate and calculate survey information.

Thereafter, the display apparatus DSD may include measurement information of each of the received main and branch measuring instruments MR, SR1 to SRn, total summed measurement information, and total measurement information of the grouped branch measuring instruments SR1 to SRn. Are displayed in full screen or split screen, respectively (ST8).

As described above, the electric energy measuring system and the electric energy measuring amount display method according to the embodiment of the present invention selectively group the main and branch measuring instruments MR (SR, SR1 to SRn) configured in each branched distribution line. For example, the measured amount of electrical energy of the grouped instruments can be displayed in groups.

Thus, in addition to the electrical energy measured amount information measured by each of the independent measuring instruments, it is possible to easily check the measured amount sum information of the grouped instruments, the measured amount sum information of the entire instruments, and the like.

In addition, in the present invention, the management of the overall electrical energy management by allowing the management to check and use the measurement information of each instrument, the total measurement information of the grouped instruments, and the total measurement information of all the instruments with a single instrument or display device The accuracy and efficiency can be further improved.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

MR: main instrument
SR1 to SRn: multiple branch instruments
DSD: display device
MCB: main breaker
CB: multiple branch breaker

Claims (12)

A plurality of branch measuring instruments each measuring electrical energy of a plurality of branch distribution lines branched from the main distribution line;
At least one main measuring instrument for measuring electrical energy of the main distribution line and outputting measured amount information of the main distribution line and measured amount information respectively from the plurality of branch measuring instruments; And
Receiving measured quantity information of each of the at least one main measuring instrument and the plurality of branch measuring instruments, the measured quantity information of each of the main and branch measuring instruments, the total summed measuring information, and the total measured quantity information of the grouped branch measuring instruments. Including a display device for displaying,
Electrical energy metering system.
The method of claim 1,
The at least one main instrument
RS communication (Recommended Standard Revision) is performed in the form of a combination of serial, parallel, or parallel / parallel with the plurality of branch measuring instruments and the display device,
Transmitting the measured quantity information of the main distribution line and the measured quantity information respectively measured from the plurality of branch measuring instruments to the display device,
Electrical energy metering system.
The method of claim 1,
The display device
Providing an application screen for selecting and grouping each branch instrument through the display panel;
Displaying the measured quantity information of each of the main and branch measuring instruments, the total summed measuring quantity information, and the summed measured quantity information of the grouped branch measuring instruments on the relay amount display unit or the display panel screen of the main relay;
Electrical energy metering system.
The method of claim 3, wherein
The application is
A group add menu for selectively grouping each branch meter;
A group information input toolbar including the added group name and group ID;
At least one branch instrument selection menu to each include in the at least one group;
Supporting a branch information input toolbar including a name for each branch meter and a branch meter ID included in each of the at least one group,
Electrical energy metering system.
The method of claim 3, wherein
The application is
A group information display unit for dividing and displaying aggregated measurement information of the branch measuring instruments grouped into the at least one group for each of the groups;
A meter-specific information display unit for dividing and displaying measured quantity information of each of the main and branch measuring instruments;
Supporting the full-capacity display unit displaying the total aggregated measurement information of the main and branch measuring instruments on the screen
Electrical energy metering system.
The method of claim 1,
The main instrument
Analyze the electrical energy measurement information of the main distribution line to determine the overcurrent, overvoltage, overload and power failure errors of the main distribution line, and when the error is determined, control the main breaker trip of the main distribution line to control the power of the main distribution line Block and
Each branch meter is
Analyze the electrical energy measurement information of the branch distribution line to determine the overcurrent, overvoltage, overload and power failure errors of the branch distribution line, and when the error is determined, the branch breaker trip of the branch distribution line is controlled to Power off,
Electrical energy metering system.
The method of claim 1,
The display device
It is integrated with the main measuring instrument, and supports to select and group each branch measuring instrument through an application program screen, or reads group information of each branch measuring instrument belonging to each grouped in advance,
Receive measured quantity information respectively measured by the main measuring instrument and the plurality of branch measuring instruments, and according to the group information, the measured quantity information of each of the main and branch measuring instruments, the total summed measuring information, and the grouped branch measuring instruments. Detecting the aggregated measurement information, and displaying the detected measurement information on the display screen,
Electrical energy metering system.
Supporting selection and grouping of at least one branch instrument through an application screen;
Reading group information of each branch measuring instrument belonging to each grouped in advance;
Measuring electrical energy of a main distribution line into which system power is input through a main meter;
Measuring electrical energy of each of the plurality of branch distribution lines branched from the main distribution line through the plurality of branch meters;
Receiving measured quantity information from the main measuring instrument and the plurality of branch measuring instruments, respectively, and displaying the measured quantity information of each of the main and branch measuring instruments, the total summed measuring information, and the total measured quantity information of the grouped branch measuring instruments. Comprising the steps,
How to display electrical energy measurand.
The method of claim 8,
Displaying the measured amount information
The main instrument performs RS communication in the form of a combination of serial, parallel or parallel / parallel with the display device and the plurality of branch meters,
The method further comprises the step of transmitting the measured amount information, respectively measured from the main measuring instrument and the plurality of branch measuring instruments to the display device,
How to display electrical energy measurand.
The method of claim 8,
Displaying the measured amount information
Providing an application program screen for selecting and grouping each branch gauge through a display panel;
Displaying the measured quantity information of each of the main and branch measuring instruments, the total summed measuring quantity information, and the summed measured quantity information of the grouped branch measuring instruments on the relay amount display unit or the display panel screen of the main relay; ,
How to display electrical energy measurand.
The method of claim 10,
Displaying the measured amount information
Dividing and displaying aggregated metrology information of branch meters grouped into the at least one group for each group;
Dividing and displaying measured quantity information of each of the main and branch measuring instruments;
Displaying total aggregated metrology information of the main and branch meters;
How to display electrical energy measurand.
The method of claim 8,
Analyzing electrical energy measurement information of the main distribution line using the main measuring instrument;
Determining an overcurrent, an overvoltage, an overload, and an outage error of the main distribution line, and controlling the main breaker trip of the main distribution line to cut off power of the main distribution line when determining the error;
Analyzing electrical energy measurement information of the branch distribution line by using each branch meter;
Determining an overcurrent, an overvoltage, an overload, and an outage error of the branch distribution line, and controlling the branch breaker trip of the branch distribution line to cut off power of the branch distribution line when the error is determined.
How to display electrical energy measurand.

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