KR101095976B1 - System of diagnosis for branch line of power distribution cable line using plc - Google Patents

Abstract

PURPOSE: The branch line diagnosis system of a distribution line using power line communications is provided to grasp the excess of a fixed range by comparing a current amount which is provided to consumer population and the current amount of a power line which is flowed on a real time. CONSTITUTION: The branch line diagnosis system of a distribution line comprises a plurality of PLE(Power Line Communications) apparatuses(10), a power line communication network(20), a integration server(30), a wireless communications network(40), and a administrator terminal(50). The PLC apparatus forms quarter S/W at every branch lines of each building and execute administration at every consumer population units. The PLC apparatus compares a current amount which is provided to consumer population and the current amount of a power line which is flowed on a real time and senses the excess or the inconsistency of a fixed range which is fixed in advance. The integration server receives a generic number of the quarter S/W and transmits to the administrator terminal through a wireless network.

Description

System of diagnosis for branch line of power distribution cable line using PLC}

The present invention relates to a branch line diagnosis and a power quality compensation system of a distribution line using power line communication, and more specifically, by using power line communication, in real time at a remote location without additionally installing an optical communication line or an internet line for communication. Compare the amount of current supplied to the power line with the amount of current provided to the customer group, and if there is an inconsistency exceeding the preset range, if there is an error in the current and power quality supplied to the customer group, the power line together with the identification number of the building of the customer group The present invention relates to a branch line diagnosis and a power quality compensation system of a distribution line using power line communication to enable a quick action to be taken by remote communication using communication and to supply power through its own compensation power system.

Power Line Communication (PLC) is a technology that communicates voice and data on high frequency signals through a power line that supplies power.It controls home appliances, lighting devices, heating and cooling devices, and home security systems in the medium and low speed fields. Increasingly, high speed technology of over 10Mbps is being developed in the high-speed field, and the superiority and necessity of power line communication is emerging.

With this power line communication, it is easy to transmit an abnormality in a distribution line to a management server at a remote location without installing an additional optical communication line or an internet line for communication.

On the other hand, in the modern industrial society where the power dependency is very high, it is publicly known through the media that small breakdowns in electric power facilities due to lightning strikes have serious effects on the national power grid. The blackout caused economic losses.

All faults in the power grid facility, one of these important industrial facilities, must be addressed immediately for system stability. If a distribution line fault occurs, even if the fault is caused by a very low current supply, the grid operator will immediately identify it. Of course, it is necessary to establish appropriate measures to secure the stability of the power system.

Accordingly, in the technical field, power line communication coverage is categorized into a consumer group having a predetermined range, and not only an emergency power system is provided for each consumer group, but also a technology development for establishing a monitoring system for a distribution line is required.

[Related Technical Literature]

1. Monitoring sensor for distribution line and remote monitoring system for distribution line with same (Patent Application No. 10-2007-0117244)

The present invention is to solve the above problems, by using the power line communication, the current amount of the power line flowing in real time from the remote site without installing additional optical communication line or Internet line for communication and the amount of current provided to the customer group compared Accordingly, to provide a branch line diagnosis and a power quality compensation system of a distribution line using power line communication for the purpose of making it possible to know if a mismatch exceeds a preset range.

In addition, the present invention, if there is an abnormality in the current and the power quality supplied to the customer group, by using the power line communication with the identification number of the building of the customer group so that it can be promptly taken by the prompt action is taken and at the same time its own compensation power It is to provide a branch line diagnosis and power quality compensation system of a distribution line using power line communication to supply power through the system.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a branch line diagnosis and power quality compensation system of a distribution line using power line communication according to an embodiment of the present invention, when the customer group consists of a plurality of buildings, branch S for each branch line to each of the buildings. / W to form and manage the unit by the customer group, and is provided in the power lead-in line that is the power line of the customer group by comparing the current amount of the power line flowing in real time and the amount of current provided to the customer group, the predetermined range A PLC device for generating status information when there is an inconsistency or abnormality in current and power quality supplied to the consumer group; And the state information (current abnormality information, power quality information), a PLC device identification number, a building having an abnormality in current or power quality among the plurality of buildings from the PLC device linked to a power line communication network composed of a plurality of underground distribution lines. It characterized in that it comprises an integrated server for receiving the unique number of the branch S / W indicating to transmit to the administrator terminal over the wireless communication network.

In the system for diagnosing branch lines of a power distribution line using power line communication and power quality compensation system according to another embodiment of the present invention, when the PLC device has an abnormality in power quality among buildings constituting the consumer group, the PLC power may store the previously stored compensation power. It is characterized in that the supply to the branch line of the building having an abnormal power quality.

A branch line diagnosis and power quality compensation system of a distribution line using power line communication according to another embodiment of the present invention, the PLC device includes: a connection unit connecting the power lead line and the power line communication network; A sensing unit measuring current flowing in through the connection unit; A PLC communication unit performing power line communication (PLC) through the integrated server and the power line communication network; Detects current value and voltage value for each of a plurality of branch lines branched to each building included in the consumer group, calculates the current value, and determines the current abnormality and power quality to obtain the state information (current abnormality information, power quality information). A branch line power supply / status measurement unit for generating and extracting a unique number of a branch S / W representing a building having an abnormality in the current or the power quality; And a current amount of the power line and a customer provided in the power lead-in line of the customer group after synchronizing the current measurement timing by the sensing unit with the state information measurement timing in the branch line power supply / status measurement unit. Compared the amount of current provided in the group, if the measured current amount is inconsistent over the preset range, branch line indicating the state information (current abnormality information), the PLC device identification number, and the building with the extracted current abnormality It characterized in that it comprises a control unit for controlling the PLC communication unit to transmit the unique number of the branch S / W corresponding to the integrated server.

In a system for diagnosing branch lines of a power distribution line using power line communication and a power quality compensation system according to another embodiment of the present invention, the control unit may include the status information (power quality information) and the PLC device identification number when there is an error in the power quality. And controlling the PLC communication unit to transmit the unique number of the branch S / W corresponding to the branch line representing the building having the extracted current quality abnormality to the integrated server.

In a system for diagnosing branch lines of a power distribution line using power line communication and a power quality compensation system according to another embodiment of the present invention, the PLC device receives surplus power from the power line in real time in a normal power supply state input to the connection unit. A large capacity rechargeable battery for storing; And supplying the compensation power calculated by the branch line power supply / status measurement unit to a building having an abnormal power quality when there is an abnormality in the power quality among buildings constituting the consumer group under the control of the controller. Characterized in that it further comprises a power converter for controlling the output energy of the rechargeable battery.

In the line diagnosis and power quality compensation system of the distribution line using power line communication according to another embodiment of the present invention, the power conversion unit DC / AC for converting the output energy of the large-capacity rechargeable battery from direct current to alternating current (DC / AC) converter; A voltage compensator for controlling output energy from the DC / AC converter to apply a voltage to a desired one of the plurality of branch lines connected to the branch line power supply / status measurement unit; And when the power quality abnormality for the branch line detected the power quality abnormality is released, characterized in that it comprises a voltage cut-off unit for blocking the voltage flowing to the branch line through the branch line power supply / state measuring unit in the large-capacity charging battery.

 In the system for diagnosing branch lines of a distribution line and power quality compensation system using power line communication according to another embodiment of the present invention, the control unit may include the power quality information as a power failure event, an instantaneous voltage increase event, an instantaneous voltage drop event, and a power factor drop. In the case of including an event, when a threshold value for each of the power quality is abnormal through a comparison using a voltage level with reference data set, compensation information is generated and transmitted to the power converter, and the power conversion is performed. Blowing. The output voltage of the large-capacity rechargeable battery is converted to correspond to the compensation information through the control of the large-capacity rechargeable battery, and is controlled to be provided to the branch line having an abnormality in the power quality through the branch line power supply / status measurement unit. do.

In a system for diagnosing branch lines of a power distribution line and power quality compensation system using power line communication according to another embodiment of the present invention, the PLC communication unit may measure current when the power line is measured by the sensing unit and the branch line power supply / state measuring unit. An operation synchronization module configured to set an operation period according to the preset period when the timing of measuring state information in the controller is synchronized to a preset period under control by the controller; When the operation period is determined according to the operation synchronization module, DA / AD not only receives analog data from the connection unit and converts it into digital data, but also receives digital data from the control unit, converts it into analog data, and delivers the analog data to the connection unit. Converter module; And only received data of a first frequency band preset for use by the PLC communication unit among modulated signals flowing through the DA / AC converter module through the DA / AC converter module, to be used for the power line, and according to the control of the controller. And a data extraction / generation module for generating only transmission data of the set second frequency band.

In a branch line diagnosis and power quality compensation system of a distribution line using power line communication according to another embodiment of the present invention, the branch line power supply / status measurement unit divides each branch line branched into each building of a consumer group composed of the plurality of buildings. Multiple branch S / W switching; And controlling the plurality of branch S / Ws, and receiving the state information (current abnormality information and power quality information) of each branch line located at the lower end of each of the branch S / Ws. And a multiplexer for transmitting the quality information) to the control unit together with the unique number of the branch S / W representing the building having an abnormality in the current or power quality.

The distribution line diagnosis and power quality compensation system using the power line communication according to the embodiment of the present invention, by using the power line communication, the amount of current of the power line flowing in real time from a remote site without additionally installing an optical communication line or an Internet line for communication By comparing the amount of current provided to the customer group and the inconsistency exceeding a predetermined range provides an effect to know.

In addition, the distribution line diagnosis and power quality compensation system using the power line communication according to another embodiment of the present invention, if there is an abnormality in the current and power quality supplied to the customer group power line communication with the identification number of the building of the customer group This means that remote action can be used to ensure that action is taken quickly and that power can be supplied through its own compensating power system.

1 is a diagram illustrating a branch line diagnosis and a power quality compensation system of a distribution line using power line communication according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating each PLC device of FIG. 1. FIG.

Hereinafter, the detailed description of the preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted when it is deemed that they may unnecessarily obscure the subject matter of the present invention.

In the present specification, when one component 'transmits' data or a signal to another component, the component may directly transmit the data or signal to another component, and through at least one other component. This means that data or signals can be transmitted to other components.

1 is a diagram illustrating a branch line diagnosis and a power quality compensation system of a distribution line using power line communication according to an embodiment of the present invention.

Referring to FIG. 1, a branch line diagnosis and power quality compensation system of a distribution line using power line communication includes a plurality of PLC devices (10: PLC device 1 (10-1) to PLC device n (10-n), where n is a natural number). , A power line communication network 20, an integrated server 30, a wireless communication network 40, and an administrator terminal 50.

Each of the plurality of PLC devices 10-1 to 10-n is provided at the power lead-in of the customer group A, and compares the current amount of the power line 1 flowing in real time with the amount of current provided to one customer group A. FIG. In this case, if the measured current amount exceeds a preset range, or if there is an abnormality in power quality, the integrated server 30 is transmitted by transmitting the status information and the identification number of the PLC device to the integrated server 30 provided in the power management office. ) To establish a system that can diagnose the change of state of underground distribution line in real time.

In addition, each PLC device (10-1 to 10-n), if there is an abnormality in the power quality of the building constituting the consumer group (A) by supplying the pre-stored compensation power to the building having an abnormal power quality, Enable problem solving.

Power line communication network 20 is composed of a plurality of underground distribution lines to enable information exchange between each PLC device (10-1 to 10-n) and the integrated server (30).

Integrated server 30 is a PLC device, the status information (current abnormality information, power quality information) from each of the plurality of PLC devices (10-1 to 10-n) linked to the power line communication network 20 composed of a plurality of underground distribution lines An identification number and a unique number of a branch S / W (see FIG. 2) indicating a building having an abnormal current or power quality to be described later are transmitted to the manager terminal 50 through the wireless communication network 40.

In this case, the integrated server 30 may use the wireless communication network 40 to transmit the status information to the manager terminal 50.

The wireless communication network 40 may be a synchronous mobile communication network or an asynchronous mobile communication network. As an embodiment of the asynchronous mobile communication network, a WCDMA (Wideband Code Division Multiple Access) communication network is exemplified. In this case, although not shown in the figure, the wireless communication network 40 may include an RNC (Radio Network Controller), an asynchronous MSC (Mobile S / Witching Center), and the like. Meanwhile, although the WCDMA network is taken as an example, it is well known that it may be changed to a next-generation mobile communication network such as 3G LTE network and 4G network.

The manager terminal 50 is a terminal possessed by the manager, and includes status information (current abnormality information, power quality information), PLC device identification number, and a unique number of branch S / W indicating a building having an abnormal current or power quality. It receives a notification from the integrated server 30 through the wireless communication network 40 to quickly take action.

The manager terminal 50 is a device that provides an Internet service including Internet data to the manager through a wireless link through the wireless communication network 40, which is a comprehensive concept of portable devices. That is, mobile phone, wireless terminal, PDA (Personal Digital Assistant), GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA-2000 phone, Mobile Broad and System (MBS) phone, Portable Multimedia (PMP) Player, handheld computer, such as a multimedia phone and a multimedia player. Here, the MBS phone may be a mobile phone to be used in the fourth generation system currently being discussed.

FIG. 2 is a diagram illustrating each PLC device 10 of FIG. 1. In FIG. 1, a group of a plurality of PLC devices is denoted by reference numeral 10. Hereinafter, for the convenience of description and a simplification of the reference numerals, each PLC device will be described with reference numeral 10. Referring to FIG. 2, each of the PLC device 10 includes a connection unit 11, a sensing unit 12, a storage unit 13, a PLC communication unit 14, a branch line power supply / state measurement unit 15, and a power supply unit ( 16), a power converter 17, a large-capacity charging battery 18 and the control unit 19.

The connection part 11 is a unit which connects the electric power lead-in wire which is the electric power line 1, and each PLC apparatus 10. FIG.

The sensing unit 12 measures the current flowing through the power line 1 connected to the connection unit 11 and provides the measured value to the control unit 19. Here, the current measuring method according to an embodiment of the present invention can be implemented through a conventional CT (current transformer) or ZCT (image current transformer) circuit provided in the connection portion 11.

The storage unit 13 stores the amount of current flowing through the power line 1 measured by the sensing unit 12, the state information (current abnormality information, current quality information) measured by the branch line power supply / state measuring unit 15, The identification number of the PLC device 10 and the unique number of the branch S / W corresponding to the branch line 2 indicating a building having a current abnormality or a current quality abnormality among the plurality of branch S / Ws 15b are determined by the control unit 19. Store under control.

On the other hand, the storage unit 13 is a non-volatile memory (NVM), even if the power is not supplied to maintain the stored data and is not erased, flash memory (Flash Memory), MRAM (Magnetic Random Access Memory), Phase-change random access memory (PRAM), ferroelectric RAM (FRAM) and the like.

The PLC communication unit 14 performs power line communication (PLC) through the integrated server 30 and the power line communication network 20.

The PLC communication unit 14 includes an operation synchronization module 14a, a DA / AD converter module 14b, and a data extraction / generation module 14c.

The operation synchronization module 14a includes the current measurement timing for the power line 1 by the sensing unit 12 and the current abnormality and power quality for the plurality of branch lines 2 by the branch line power supply / status measurement unit 15. Since the above-described determination measurement time is performed in synchronization with a predetermined period under the control of the control unit 19, the DA / AD converter module 14b and the data extraction module 14b operate in the same period.

When the operation timing is determined according to the operation synchronization module 14a, the DA / AD converter module 14b receives analog data from the connection unit 11, converts the analog data into digital data, and transfers the data to the data extraction module 14c. 19, digital data is received, converted into analog data, and then transmitted to the connecting portion 11.

That is, the DA / AD converter module 14b simultaneously performs a digital to analog converter (DAC) function for converting transmission / reception data into analog data and an analog to digital converter (ADC) function for converting transmission / reception data into digital data. .

The data extraction / generation module 14c receives received data of a first frequency band preset for use by the PLC communication unit 14 of modulated signals flowing through the power line among received data input from the power line through the DA / AC converter module 14b. Extract only.

In addition, the data extraction / generation module 14c generates only the transmission data of the second frequency band set in advance under the control of the controller 19.

As described above, the PLC communication unit 14 transmits and receives data with the integrated server 30 through the power line.

The branch line power supply / state measuring unit 15 has a multiplexer 15a, which is a contact point for branching the distribution line to each building included in the consumer group A, and a plurality of branches S / which can switch each branch line 2. W (15b) (branch S / W1 (15b-1) to branch S / Wn (15b-m, m is a natural number), where a plurality of branched S / W 15b is equal to the number of branching lines 2; Is formed.

In the present invention, the multiplexer 15a controls a plurality of branch S / Ws 15b, and the branch line power supply / state measuring unit 15 is located at the bottom of each branch S / W 15b by the multiplexer 15a. The state information (current abnormality information and power quality information) of the branch line 2 is received and transmitted to the control unit 19.

To this end, the branch line power supply / state measuring unit 15 calculates the current value and the voltage value detected for each of the plurality of branch lines 2, and has the ability to determine the current abnormality and the power quality, and the current abnormality and the power. The problem with the quality should have the function of transmitting to the control unit 19 immediately by communication upon determination.

On the other hand, the multiplexer 15a also has a function of blocking part / all of the power entering each building along each branch line 2 in accordance with opening and closing of the plurality of branch S / Ws 15b.

In addition, the branch line power supply / state measuring unit 15 is attracted to the specific building when it is determined that the current or power flowing into the specific building through the branch lines 2 connected to the plurality of branch S / Ws 15b is abnormal. Extract the unique number of the branch S / W to be transmitted to the control unit 19 with the status information.

The power supply 16 senses the voltage of the power line 1 supplied through the connection unit 11, the sensing unit 12, the PLC communication unit 14, the power conversion unit 17, the large-capacity charging battery 18, and the control unit 19. Supply it to the power supply necessary for the conversion.

The power converter 17 includes a DC / AC converter 17a, a voltage compensator 17b, and a voltage cutout 17c. Here, the DC / AC converter 17a converts and outputs the output energy of the large-capacity rechargeable battery 18 under the control of the controller 19.

The voltage compensator 17b intercepts the energy output from the DC / AC converter 17a to control the branch line power supply / status measurement unit 15 to connect the branch line 2 connected to the branch line power supply / status measurement unit 15. Apply voltage to

When the voltage cutoff unit 17c releases the current quality abnormality with respect to the branch line 2 whose power quality abnormality is detected in part or all of the specific branch S / W 15b by the baseline power supply / status measuring unit 15, In addition, the high-capacity rechargeable battery 18 cuts off the voltage flowing through the branch line power supply / state measuring unit 15 through the branch line 2.

The large capacity rechargeable battery 18 receives and stores surplus power from a power line in real time in a normal power supply state from the connection unit 11.

The controller 19 receives the amount of information in the synchronized state by synchronizing the current measurement timing by the sensing unit 12 with the state information measurement timing in the branch line power supply / status measurement unit 15.

The controller 19 compares the current amount of the power line 1 provided in the power lead line of the customer group A with the current amount provided to one customer group A to compare the current amount to the preset range. If there is an inconsistency in excess, and there is an error in the power quality, the branching line (2) indicating the state information, the PLC device 10 identification number, and the building having the current abnormality or the current quality abnormality among the plurality of branch S / Ws 15b. Control the PLC communication unit 14 to transmit the unique number of the branch S / W corresponding to) to the integrated server 30 provided in the power management office.

More specifically, the control unit 19, if it is determined from the branch line power supply / state measuring unit 15 as the current information for the plurality of branch lines (2), the branch S / W connected to each branch line (2) The identification number 15b is also received at the same time.

On the other hand, the state information includes information collected according to the classification criteria of various power quality items such as power failure, instantaneous voltage rise, instantaneous voltage drop, and power factor drop as well as current abnormality.

The controller 19 uses the voltage level as reference data in which the threshold values, which are preset for each of the instantaneous power failure events, the instantaneous voltage rising events, the instantaneous voltage drop events, and the power factor reduction events included in the collected state information, are set. By comparing, it is possible to further determine whether there is an abnormality in the power quality supplied to the building of the predetermined area through the branch line 2.

On the other hand, if it is determined that the power quality is abnormal, the controller 19 calculates compensation information corresponding to the power quality in the abnormal state.

Thereafter, the controller 19 transmits the calculated compensation information to the power converter 17 so that the output voltage of the large capacity charge battery 18 is controlled by controlling the large capacity charge battery 18 of the power converter 17. It is converted to correspond to the compensation information and provided to the branch line power supply / status measurement unit 15.

Accordingly, the branch line power supply / state measuring unit 15 controls the branch S / W corresponding to the branch line 2 having the abnormal power quality among the plurality of branch S / Ws 15b, thereby causing abnormality in the power quality. The output voltage of the large-capacity rechargeable battery 18 is controlled to be supplied through the branch line 2.

As described above, the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention. It is not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

10: PLC device 11: Connection part
12: sensing unit 13: storage unit
14: PLC communication unit 14a: motion synchronization module
14b: DA / AD converter module 14c: data extraction / generation module
15: branch line power supply / state measurement unit 15a: multiplexer
15b: Branch S / W 16: Power Supply
17: power converter 17a: DC / AC converter
17b: voltage compensator 17c: voltage interrupter
18: large capacity charging battery 19: control unit
20: power line communication network 30: integrated server
40: wireless communication network 50: administrator terminal

Claims (9)

When the consumer group is composed of a plurality of buildings, the branch S / W is formed for each branch line to each of the buildings, and the management is performed for each of the customer group units. A PLC device which compares the amount of current of the power line with the amount of current provided to the customer group and generates status information when there is an inconsistency exceeding a preset range or there is an abnormality in the current and power quality supplied to the customer group; And
Represents the status information (current abnormality information, power quality information), PLC device identification number, the current or power quality of the plurality of buildings from the PLC device linked to the power line communication network composed of a plurality of underground distribution lines Integrated server for receiving the unique number of the branch S / W and transmits to the administrator terminal through a wireless communication network; Branch line diagnostic system of a distribution line using power line communication comprising a.
The method according to claim 1, wherein the PLC device,
When the power quality of the buildings constituting the consumer group has an abnormality in the branch line diagnostic system of the power distribution line using power line communication, characterized in that for supplying the pre-stored compensation power to the branch line of the building having the abnormal power quality.
The method according to claim 2, wherein the PLC device,
A connection unit connecting the power lead line and the power line communication network;
A sensing unit measuring current flowing in through the connection unit;
A PLC communication unit performing power line communication (PLC) through the integrated server and the power line communication network;
Detects current value and voltage value for each of a plurality of branch lines branched to each building included in the consumer group, calculates the current value, and determines the current abnormality and power quality to obtain the state information (current abnormality information, power quality information). A branch line power supply / status measurement unit for generating and extracting a unique number of a branch S / W representing a building having an abnormality in the current or the power quality; And
After synchronizing the current measurement timing by the sensing unit and the state information measurement timing in the branch line power supply / status measurement unit, the current amount of the power line and the customer group provided in the power lead-in of the customer group in real time. If the measured current amount is inconsistent by exceeding a preset range, the status information (current abnormality information), the PLC device identification number, and a branch line indicating a building with the extracted current abnormality are compared. A control unit controlling the PLC communication unit to transmit the unique number of the corresponding branch S / W to the integrated server; Branch line diagnostic system of a distribution line using power line communication comprising a.
The method according to claim 3, The control unit,
If there is an abnormality in the power quality, the integrated server is a unique number of the branch S / W corresponding to the branch information indicating the state information (power quality information), the PLC device identification number, and the extracted current quality abnormal building; A branch line diagnosis system of a distribution line using power line communication, characterized in that for controlling the PLC communication unit to transmit to.
The method according to claim 4, wherein the PLC device,
A large capacity rechargeable battery that receives and stores surplus power from the power line in real time in a normal power supply state input to the connection unit; And
If there is an abnormality in the power quality among the buildings constituting the consumer group under the control of the controller, the large-capacity charging to supply the compensating power calculated by the branch line power supply / status measurement unit to the building having the abnormality in the power quality. A power converter for controlling output energy of the battery; Branch line diagnostic system of a distribution line using power line communication further comprising a.
The method according to claim 5, wherein the power conversion unit,
A DC / AC converter for converting and outputting the output energy of the large capacity rechargeable battery from DC to AC;
A voltage compensator for controlling output energy from the DC / AC converter to apply a voltage to a desired one of the plurality of branch lines connected to the branch line power supply / status measurement unit; And
A voltage blocking unit for blocking a voltage flowing through the branch line power supply / status measurement unit from the large-capacity rechargeable battery when the power quality abnormality is released for the branch line in which the power quality abnormality is detected; Branch line diagnostic system of a distribution line using power line communication comprising a.
The method according to claim 5, The control unit,
When the power quality information includes an instantaneous power failure event, an instantaneous voltage rising event, an instantaneous voltage drop event, and a power factor decreasing event, the power is determined through a comparison using a voltage level with reference data set with preset threshold values for each. If there is an abnormality in quality, the compensation information is generated and transmitted to the power conversion unit,
The power conversion unit. The output voltage of the large-capacity rechargeable battery is converted to correspond to the compensation information through the control of the large-capacity rechargeable battery, and is controlled to be provided to the branch line having an abnormality in the power quality through the branch line power supply / status measurement unit. Branch line diagnosis system of a distribution line using power line communication.
The method of claim 3, wherein the PLC communication unit,
When the current measurement timing for the power line by the sensing unit and the measurement time of the state information in the branch line power supply / status measurement unit are synchronized to a preset period under control by the controller, an operation period is performed according to the preset period. Setting operation synchronization module;
When the operation period is determined according to the operation synchronization module, DA / AC not only receives analog data from the connection unit and converts it into digital data, but also receives digital data from the control unit, converts the analog data into analog data, and delivers the analog data to the connection unit. Converter module; And
Among the received data input from the power line through the DA / AC converter module, only the received data of the first frequency band preset for use by the PLC communication unit is extracted from the modulated signals flowing on the power line, and preset according to the control of the controller. A data extraction / generation module for generating only transmission data of the second frequency band; Branch line diagnostic system of a distribution line using power line communication comprising a.
The method according to claim 3, wherein the branch line power supply / state measuring unit,
A plurality of branch S / Ws for switching each of the branch lines branched to each building of the customer group consisting of the plurality of buildings; And
The plurality of branch S / Ws are controlled, and the state information (current abnormality information and power quality information) of each branch line located at the lower end of each branch S / W is received. A multiplexer for transmitting information) to the control unit together with a unique number of a branch S / W representing a building having an abnormality in the current or power quality; Branch line diagnostic system of a distribution line using power line communication comprising a.

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