SA110310673B1 - Remote meter reading system Using FDDrepeatingmethod - Google Patents

Abstract

A remote meter reading system has been detected that uses a Frequency Division Duplex (FDD) system to perform a remote meter reading on an underground line through an underground power line communication method using an underground or neutral line and wireless means wireless such as Wi-Fi/ Zigbee, etc. The remote meter reading system using the proposed redundancy method (FDD) includes a data collection and transmission unit that transmits the read data collected by the low voltage power line connection method to the high voltage line segment using the underground line of the watt-hour meter from the consumer installed in the transformer. The ground and contactless coupler support FDD redundancy system installed in the high pressure line of the underground line.

Description

—_Y_

FDD is a remote meter reading system using the redundancy method

Remote meter reading system using fdd repeating method Full Description Background of the invention The present invention relates to a remote meter reading system using the “(FDD) Frequency Division Duplex” method and in particular; ohidiuly remote meter reading system 701 redundancy method which obtains data © read from an electronic abe electronic watt-hour low voltage consumer powered by a submersible transformer using a line connection power and transmits the obtained data to the underground high-voltage line segment and to a front-end processor .remote meter reading and remote meter reading provider / (FEP) End Processor with the development of the remote meter reading system By using the method of wired and wireless communication) * As a result of the development of information technology techniques, the marketing of some vertical parts as a whole has made progress in the country. As shown in the illustration (Jedi) remote meter reading system image of a vertical line according to the relevant occupation Mobile modem with power communication line. The remote meter reading system is set up to include: an electronic watt-hour meter 01 installed in the consumer Vo0 ¢ and 60 peripheral data concentration units (DCU) installed on the 01 utility pole to collect meter data periodically from

creamy -

The electronic meter watt-hours 0 in the consumer 0 and data concentration units 50 units (DCU) which transmit the collected meter data to the remote meter reading provider Ve which includes the lily customer information base FEP “10 customer information database m. and remote meter reading provider 60. In the remote meter reading system

vertical © ball according to the relevant occupation; The 701 communication connector between the electronic watt-hour meter 01 on the consumer 300 and the DCU £0 uses a power line connector style;

A RF or dedicated line mode of A+ communication between 40 DCUs using the RF method; dedicated line mode; bus wire mode; or power line communication mode; connector 0 communication between DCUs 546 « and remote reading provider 60 which

Code division multiple accessing (CDMA) Uses code division multiple accessing mode 0, digital wireless system mode ¢ hybrid fiber coaxial (HFC) and hybrid coaxial fiber mode

Supplied with Ly drunked radio system (TRS) box and similar. Patents published in the country revealed non-publication Korea Open Patent No. + A= 0517673-70 titled ALT)

Remote meter reading system in the underground line

Vo using Power Line Communication only for a vertical line remote meter reading system. In the case of a remote meter reading system for an underground line based on the published power line communication ¢ It depicts physically

Underground Je voltage line and underground low voltage line as same as communication conductor ball by using a combined bridge line as a suitable high voltage impedance circuit or as a circuit

0 . Fit low voltage impedance and band pass filter. The remote meter reading system is configured to include a booster which is installed in a ground transformer or in a ground transformer box

os - - ground switching box transmits data read from the low voltage consumer to the high voltage line” and a central control unit which is installed on one of the ground transformers; the Ground Transfer Fund; Or a tube on the consumer's external wall to transmit the data received from the meter that was received from the repeater to the remote meter reading provider. © All energy used in a new town is currently provided by an underground line where the average national average for an underground line is approximately 14 7. Because it is expected to increase the underground line, which provides a safer power supply while improving the aesthetics significantly continuing into the future; Cuda an electric power company lost a lot of interest in vertical line remote meter system and underground line remote meter system. However; The direct application of the aforementioned remote reading meter system from the overhead line to the underground line may cause the following problems technically and economically. First: In the case of the vertical line remote reading meter system that is used by the electric power company; The communication between the DCUs uses a power line connection method which instead uses a JIS mounted coaxial without the use of a high voltage power line connection. 0 Installing a high-voltage contact coupler on a high-voltage vertical line ha (YY,4 kV) is extremely dangerous in the case of a direct wire. Therefore; This installation should be performed by a professional operator. In addition to Ny edd high voltage contact coupler is expensive; The method of fixing the coaxial cable between 0015 and sending and receiving read data between 0015 is more economical. However; In Alls Underground Line laying a new communication line in an underground pipeline is very costly 01 in addition to being practically impossible to use.

Second: In the case of using the DCUs wireless communication method (mn wireless communication in the overhead line; the DCU and a wireless antenna in the form of a rod are installed at a medium height from the electric pole that ad cannot be reached) by the general public so that the general public is unlikely to harm the DCU and the © Rod Wireless Antenna. However; When the rod type antenna is installed outside of the ground at the side of the road for SLY communication, pedestrians are likely to damage the antenna out of curiosity; The antenna is in the grounded 0 transformer. Moreover, there is a problem that the performance of wireless communication deteriorates due to the outer box structure of the 0 _ transformer which is closed on all sides and the electromagnetic wave shielding properties due to the metallic materials thereof. Third: The power line connection method in the aforementioned patents means that all available frequency bands are connected through a time division duplex (TDD) clases. Attenuated from Ve before about fa Yoo to Yoo meter for long range communication shal However TDD communication method has more delay due to more cua boosters Difficult to synchronize transmission time slots and reception, and thus reduces the communication speed. Therefore, the TDD communication method should have 23 limited amplifiers.” generally about ? TDD boosters and the result of “llll” and with the use of the TDD iteration method with a limited number of boosters; There is a problem that Ye power line connection in all parts can not be made by long line underground high voltage line.

-on-

Fourth: The TDD communication method is generated, which uses all the bandwidths allowed for a line connection

Excessive noise energy (JUAN) is the batch that is generated from a certain frequency range; that is, it is not

Effective in terms of communication performance compared to the available bandwidth.

Fifth: It is connected to a contactless coupler used to apply/extract a signal

© Power line connection to/from the line. A contactless coupler is currently being installed

In 105777095 because the underground high voltage line can prevent gle coupler current saturation

The seam that results due to the current flowing in the underground high voltage line only when the limit is achieved

The maximum allowable current is 1007 m from the underground high voltage line. However; in order to manufacture

contactless coupler Ging the maximum allowable current ++ (AT) We need a large amount of 0 microcrystals; therefore, the manufacturing cost of the contactless coupler is high; which is a hindrance to the use of

Practically horned seam blocker.

Sixth: A central conductor for the currently used high voltage is configured to include an ile layer and a protection layer;

cover; etc. When applying/extracting the power line connection signal using the ple contact coupler

contactless coupler » Significant signal attenuation occurs due to the protective layer and casing; Which reduces the connection speed to 0 and negatively affects long-distance communications.

underground In order to obtain a better performance of meter reading on the line underground lll

line © There is a need for a suitable remote meter reading system for the underground line, taking into account

Consideration: a method of communication that can be done without having to put an additional communication line in line

ground tubing; and a seam-seal coupler that can support the 701 redundancy style while reducing the price

anti-seam coupler and a repeat method that can perform long-distance/broadband communications without limiting the repeat frequency; etc. General description of the invention The problem that the invention solves © The ila of this invention provides a remote meter reading system using

LS 201 method capable of performing remote meter reading on underground communication line using power line communication method which uses layered underground high voltage line or negative line and wireless communication method such as (WiFi/ZigBee etc.) Another aspect of this invention provides a 207 repeat mode that is capable of performing long range communications

01 using a set of repeaters for optional Prix Gob of frequency bands available for power line communication according to communication channel conditions and reduce repeat delay. Another aspect of this invention is the manufacture and marketing (ie an inexpensive contactless coupler) by reducing the size of a small crystal device used for a contactless coupler which is used to apply/extract power line communication signals to/from an underground line.

FDD Another aspect of this invention provides a remote meter reading system using a Ve repeat system a broadband underground line at a cost of ga remote on ge capable of performing a meter reading by / which disconnects the line voltage The low and high voltage line under Wily is logically low / and an optimal method for redundancy of the power connection line. 7200© hs and the contact coupler (oa) operates means to address the problem.

M - Provides an ideal embodiment of this invention remote meter reading system using the FDD redundancy method and includes: The data collection and transmission unit installed in a ground transformer Jay ground transformer The data read by the low-gall power line communication method “low voltage power line” watt-hour meter for the consumer to “eda” high voltage line for an underground line ©; and a contactless coupler installed in the high-voltage line section of the underground line and supporting the JFDD redundancy system The data collection and transmission unit includes: a low-voltage power line communication network that collects the data read from the watt-hour meter installed in the consumer through gia low voltage line; an AD converter converts the readable data collected from the consumer through a low-voltage power line 0 communication network into digital data; and a microcontroller that controls a low-voltage power line communication network to collect the read data and constitutes a control for sending the read data that has been converted into digital data in the AD converter to the high-voltage line segment; a high voltage power line communication network in which the read data converted into digital data is transmitted to the high voltage 0 line segment through at least one of the 18 stages; 5; (AF) part of the high-voltage line or the negative line of the neutral line according to the control of the microcontroller. The data collection and transmission unit also includes: a power supply unit that generates the DCagall or DCL necessary to drive the voltage supplied from the AF power line The low voltage power line on the secondary side of the transformer is a communications interface that transmits and receives data from an external station.

The data collection and transmission unit also includes a sensor providing at least one of:

temperature sensor Shall and humidity sensor

and a “door sensorbll” sensor when the door is closed by the opening data

and finalization of the ground transformer based on the sensor's sensor signal which stops one on

© less than the operator of the [low voltage power line] high voltage conductor

LED and LED The WiFi/CDMA 5 power supply (LED) that powers the lls LED does not require

Monitoring by the site operator.

The low voltage power line communication network includes: a communication unit

Low voltage power line which collects the data read through the low voltage line pin

0 and performs the role of the microprocessor and the Ethernet bridge to manage the voltage power line network

low and performs the function of modulating a power line connection; 5 AFE low voltage connected to the sim line

Low voltage power cuts off the voltage supplied from the low voltage power line and applies

It extracts and amplifies power line communications signals.

Low-voltage AFE includes a low-pass filter and power amplifier on the transition side and includes ©) a low-pass amplifier; low pass filter; a ha amplifier) and a dual center filter on the side

the receiver.

The high-voltage power line communication network includes: The high-voltage power line communication unit

Cif) role of the microprocessor and ME bridge that high voltage power line communication

Ethernet bridge to which a DSP function is added to manage the high-voltage power line network ¢ and performs 0 power line communication signal loading function ¢, signal conversion function and demodulation redundancy function

oy. = - FDD function; A high voltage underground power line (AFE) is set up to include a power amplifier on the JEN side and a low profile amplifier and HL amplifier on the receiving side to amplify the power line communication signal that is applied/extracted through the coupler. contactless coupler Alle power line connects the voltage or the negative line neutral line © . The AD transformer converts current and voltage data from the secondary (low voltage) side of the transformer to ground, internal temperature data and humidity data from the grounding transformer, opening or closing data of the transformer door | door of the ground transformer into digital data. 0 The microcontroller manages the microcontroller Jow voltage power line communicat and the high voltage power line communication network; sets peripheral memory; It performs the process of processing read data and monitoring data, processes it, and controls JFDD communication The data gathering and transmission module divides the power line communication network into 10 low-voltage power line communication network and high-voltage power line communication network using a router and function Transformation of the microcontroller microcontroller. The PIE absorbs and extracts power line communication Ally signals of different frequency bands simultaneously by connecting two communication terminals to a contactless coupler in order to apply signals that have different frequency bands. The Ye line is energy.

The contactless coupler extends and extracts the power line communication signals of different frequency bands simultaneously into a single contactless coupler by connecting the T-connector in order to apply the signals of different power line communication frequency bands. The contactless coupler is prepared from the high voltage power Alls line communication © unit with the redundancy function of 700; The high-voltage power line contact unit is made of one or more power line contact segments. The remote meter reading system using the FDD redundancy method includes a filter that is placed on the outside and inside of the data gathering and transmission unit and filters the power line communication signal for only a frequency band that can be used by the redundancy system. FDD and installed, Yes, in the FDD redundancy system data gathering and transmission unit. The outer box of the data gathering and transmission unit is provided with magnetic material to connect it with the inner metal structure of the ground transformer. The remote meter reading system using the FDD redundancy method also includes a transformer antenna integrally attached to the outside of the transformer ~~©. Effect of the invention The power line communication, which is based on the remote meter reading system underground, is divided into a perfect embodiment of the current invention logically and naturally into low voltage power line communicat and power line communication network with

117 - - high voltage power line communication network to facilitate network management and to reduce the use of (Adiga TP) and in addition; The remote meter reading system uses the redundancy method (101) according to the perfect embodiment of the current invention coupled negative line manufactured at low cost in order to overcome the difficulty of marketing the power line connection© in the underground part to allow the power company electrical to implement the power line connection which is based on the remote meter reading on the gia underground line; this is due to the use of the FDD redundancy method and the cost-effective voltage contact wile coupling Je in order to implement the power line connection The method of applying / extracting the power line connection signal to and from the negative line exposed in the form of a spiral, which is part of the underground high voltage line, is more effective than the method of applying / extracting the power line connection signal because it does not Signal attenuation is generated due to the protective layer and encapsulation Theoretically, abnormal current does not flow in the negative line connected with earth.However, although good current flows due to the earth problem, a much smaller current flows than the current that flows in the underground high-voltage cable in Therefore, a remote meter reading system using the FDD redundancy method according to an exemplary embodiment of this invention can substantially reduce the maximum allowable current value of the fluid contact coupler; Thus, it becomes easy to manufacture and market a low-cost contactless coupler by reducing the size of the nano-crystal device. Brief Explanation of Drawings Illustration 1 is a schematic diagram to explain the remote meter reading balsystem 0 vertical in related technology.

Q1 Illustration 1 is a diagram demonstrating the configuration of a remote meter reading system using FDD redundancy according to an exemplary embodiment of this invention. Illustrations OT are graphic (pg) to explain the remote meter reading system using the FDD Sal method according to an exemplary embodiment of this invention. © | Illustrations 0-1 are diagrams to explain the configuration of a remote meter reading system using the FDD redundancy method according to an exemplary embodiment of the present invention. Description of reference numbers: alae: 0 electronic watt-hours 0: utility pole Ye 0?: consumer 0: data concentration units (DCU) FEP : 8 0 : remote meter reading server 0 : Data gathering and transmission unit (DG&TU) : 101 8 Low voltage power line communication network 01: Low Voltage Analog Front End (AFE).

4 : Low voltage power line communication module 0 : High voltage power line communication network 7 : Sle power line communication module AFE : 0 High voltage 151© : sensor 08 : AD Adapter 0 : Power module 00 : Memory 0 : Communication interfaces 1181 00 : Microcontroller WAN : 0 With ob The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that Syl) in that technique may easily implement the essence of the present invention. first and foremost; VO We should note that when giving the reference numbers for the elements of each drawing; Similar reference numbers indicate similar items even if the skewed items appear in different graphics 0 and more

and 1 - that; Known functions or constructions will not be described in detail in the description of this invention; Because it may make the understanding of this invention unnecessarily vague. Perfect embodiments of this invention have been provided so that those skilled in the technique may complete their understanding. So ; The shape, size, etc. of the elements in the drawings may be exaggerated for the purpose of clear understanding. © hereinafter; A remote meter reading system using the FDD redundancy method according to an exemplary embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The present invention provides a method for building an efficient remote meter reading system in a broadband underground line segment at a low cost while solving the problem of the above mentioned remote meter reading system. Exhibit 7 is a diagram illustrating the configuration of a remote meter reading system using the Ve-repeat 200 method according to an exemplary embodiment of the present invention; Illustrations 5-7 are diagrams to explain the remote meter reading system using the FDD redundancy method according to an exemplary embodiment of the present invention. The Data Collection and Transmission Unit (DG & TU) is configured to include: Allg 011 low voltage power line communicat includes a low voltage power line communicat 11 which collects data read from the watt-hour meter For low voltage gv consumer.

VO is a YY + low voltage power line communicat which includes a Y (AFE) ¢ analog front end and a VY + high voltage power line communicat. communication network comprising 1" high-voltage power line communication modules and ?11 Allg read data transmission; 11 AFE ¢ current/voltage monitoring data and analog digital converter (ADC) 150 Ye which converts the analog inputs to digital from the current/voltage monitor (not shown) and the

11 - - Sensor 01 sensor (eg (JG) temperature sensor, lea humidity sensor, sensor 7 + etc.); the power supply module 1001 power supply module that generates the voltage/current that “pk” memory 0 ag acts as a pad and various communication interfaces 171 (eg “ethernet interface © 177 and serial communication interface 174; Communication module 071181-71 and CDMA communication module 811); and a 180 microcontroller that collects, processes, adjusts, and manages the network. The converter signals power only (approx. Te Hz). Jd when power line communication signals (approximately 1 MHz to Yoo MHz), not 0 power signals (approximately 61 Hz), pass through the transformer. A reduction of about 40-0310 8 occurs between the primary and secondary side of the transformer due to the redundancy characteristics of the transformer.Therefore, the collection and transfer unit 100 according to an exemplary embodiment of the present invention is physically divided into two high-voltage power line connection units 177 and 17 In the underground high-voltage line part and the low-voltage power line connection unit 4 in the underground low-voltage line part in order to use Ve reduction characteristics of the primary and secondary side of the transformer and use the 188 gate function (for example (Jb) router; switch ) of the processor fine-tuning 081 microcontrollers to subdivide a logical network. Because there is no international standard for the power line communication chip, when several power line communication modems made by multiple manufacturers are running, they cannot be connected to each other and are not compatible with each other. They cannot exist together. Therefore, hetero-power line communication modems can exist on the network by physically separating the high-voltage power line communication network.

11 - - VY and the low voltage power line communicat network AY as shown in the illustration oF The data gathering and transmission unit divides 001 into the network Logical gateway based VAS where the HVP© communication modules AVY and 117 are allocated with the certified IP of the gateway router YAO to the upper layer WAN Yeo . The low voltage power line communication unit 11 low voltage power line is included in the data gathering and transmission unit 001 A low ga communication unit TY is built from each low voltage consumer 71 of the same subnet; So that they can use 17 private. As a result, it reduces the use of incompletely authorized IP; It is possible to easily ps network Ye using the private IP between the low voltage power line VY and 1114 gallon communication units. The WiFi 126 communication unit enables communication between collection units And the adjacent data decreases 001 when it is impossible to carry out power line communication in the part of the high voltage line (Sa oe wireless communication) using a test station for debugging; which can be connected in place.

\o Although an antenna for radio communications is installed in the ball part of the overhead line at a middle elevation of the electric pole which is not accessible to the general public, the ground transformer is installed and commissioned in the underground part of the line on the side of the road. So; When the protruding rod-shaped antenna is installed outside the ground transformer so that it is easily accessible to pedestrians and bystanders; pedestrians are more likely to damage the antenna out of curiosity; And when it's done

Ye Installing the Antenna in the Ground Transformer » There is a problem with that which is that it is only possible to perform

- 18 Wireless communications using low-frequency waves because they are reduced due to the phenomenon of electromagnetic wave protection resulting from the structure of the external box of the transformer, all of which are closed. In order to solve problems; A conversion antenna is used which can be integrally attached to the outer box of the ground converter. The switching antenna is unobtrusive to pedestrians while maximizing wireless performance. © To be installed in the 001 and transmitted in a compact form data gathering The data gathering module is configured with the 001 and on top of that; When the DSG 0 ground transducer is installed the ground transducer can be attached to the ground transducer metal chassis using a magnet attached to a part of the outer box without a separate fixing device such as a lock and screw. Data collection and transmission unit 1780118 The communication unit 0 works for the electric power company. 01 remote meter reading server for FEP required DC to generate voltage / current Yeo. power supply module The power supply unit works for the ground transformer and provides the necessary electric power for each unit of 7771 to pass through the secondary side and includes a flowing electrical protection circuit (not shown in the pictures) 001 data collection and transmission units and a unit Electromagnetic wave protection (not shown in the picture). 0 Directly to the secondary side of the transformer 050 power supply module A low voltage power supply unit is connected. The power supply unit outputs AFE 112 to ground; Similar to 1 Hz only and provides the power output per unit. 0 Power from approximately 1051 module

14 - - The low-voltage AFE 112 is connected directly to the secondary side of the ileal transformer grounding of the Yen power supply (the JEN side) of the low-voltage AFE-112 includes a low-pass filter; an amplifier and the receiving side of it includes a low-end amplifier; low pass filter; signal amplifier; half duplex filter; etc.; In order to interrupt the voltage supplied from the low voltage power line and apply/extract and amplify the power line communication frequency band signal only. 112117 Low Voltage and Power Supply Unit 0 are included in the unit itself which makes it possible to limit the size of the area used. The 114 low voltage power line communication unit serves as a Y converter (AD 0 shown) or a D/A converter (not shown) which converts power line communication signals signals applied/extracted through low voltage AFE 1 on the analog-to-digital (A/D) or digital-to-analog (A/0 signals) oscilloscope; an sMlautomatic gain controller (AGC) that controls the volume of the signals being received, an oscillator and a phase-locked loop (PLL) that Agi references NC signals; and a microprocessor (not shown in the photo). ) which collects the low voltage meter reading and manages the 10L low voltage power line communicat, the “Ethernet bridge” and the power line communication update and switch function. Includes the AFE transition side of a neutral line or high-voltage underground Alen amplifier and the receiving side of it includes a low-voltage amplifier, signal amplifier, etc.; for AR amplification of the power line communication signal applied/extracted from the contactless coupler connected with the line

— for Sal Je dE underground or negative line Afr neutral line transforming the two high-voltage power line contact units 177 and 177 AD transformer (not shown in the picture) 0 DA transformer (no ed in photo) power line communication signals input through high voltage/neutral line (2560) AFE© analog-to-digital (AD) or ( D/A) and microprocessor (not shown in the picture) to which DSP function is added for high voltage power line network management; and an Ethernet bridge ¢ and power line connection update and switch function. The DJA 0618 transforms current/voltage data, Bball degree data, and indoor humidity data from the ground transformer; and the opening and closing data of the ground transformer gate from secondary data (low voltage) to 0 digital signals. An Adee YA microcontroller performs processing and playback processing on the data received from AD 165 and transmits the monitoring data of the transformer to the remote meter reading server 60. In addition; Energy consumption can be reduced by recognizing that the door of the ground transformer is closed and stopping various LEDs (eg Ji Ve low voltage power line / high voltage connection) to power the LED; the power supply that powers the Wi-Fi/ CDMA power supply that powers the LED etc.); which are not subject to monitoring by the site operator. A YA microcontroller is configured to include a YY byte CPU; interface 1/0 which is a peripheral device, ROM / RAM which are different data storage units 6 and an ethernet transmitter; adapter; and so on. Fine tuning processor is divided

vy - - 081 microcontroller to the gallon low voltage power line communicat 011 line communicat and the low voltage power line communicat 171 and the die manages the power line communication in each network . A microcontroller 081 controls the memory 0618 and peripherals (not shown in the image) and acts as a control to execute the processing, process processing into the meter read / © monitoring data and transmits the processed data to the remote meter reading server Te and controls the setup processor Accurate 088 Sa frequency division duplex (FDD) contact AFEs, 1" and 11" LV/HV. Currently using a commercial power line connection chip Connection method: | For time division duplexing (TDD) which alternately transmits and receives the same allocated frequency band (about 1 MHz Foo 0 MHz) by means of the synchronization signal as shown in the illustration Af and (BE The distance from the grounded transformer to the low-voltage Te consumer is within approximately 100 metres, and the reliability of the readable data sent from each consumer 0 using the power line communication mode is high, such that it is not dala for a separate repetition mode. The distance from the station to the underground HV line may vary according to the installed area; it is within approximately 0 EY km. Therefore, in order to implement the communication using the power line method throughout the underground HV line segments pal Weak and low power line communication signals need to be reproduced by installing a booster in each predetermined segment (about 00-705m). Figure BE Time domain transceiver current As shown in Figure Vo Figure CE and similar to 340 PLC B between VV PLC A and 0010-6 when repeater 1 is used for ead ) increases the resulting delay between 371 PLC_A and Yl.

PLCC

The - weakness of that case in which there is no lef prompter TDD and accordingly; An increase in ci Sal 0 is directly related to an increase in the delay and when the delay is increased it is difficult to synchronize the time slot send and receive; So that communication performance deteriorates such as deterioration in communication speed and limitation may occur in maximum transmission distance ¢ which generates a serious problem in Voice over IP (VOIP) or © network that requires real-time communication due to delay. In general, because the number of repeaters that can be installed according to the TDD method is © or Ji as a maximum in order to implement long-distance power line communication; There is a need for another redundancy method to construct the electric power line network through an underground line every? to kilometers supplied from one station. In order to solve the problem; As shown in the illustration. (Df) when PLC B 5 PLC_A320 340 performs power line communication TDD 0 using 1-01 MHz band using repeater 380 8 0106 between 770 PLC A PLC_C 3605 according to FDD method and Laie implements 340 21.013 and ©_©.21 3101 TDD power line communication using a range of 0-71 MHz and the delay can be reduced to less than half la. Using TDD DSA may Selecting the available frequency band uses only the required frequency band using a filter which is set up in sal VO The bandwidth that can be used for communication is reduced using redundancy mode 07 so the transmission speed is slow However long range power line communication can be made due to the increase in the number of cf) SA available. Because Lin's current commercial powerline communication chip has the chip that supports FDD redundancy function, as shown in Figure oF FDD redundancy is implemented by connecting the first 117 gall powerline communication unit dle and the second high-voltage power line connection unit Ye ?1 in a parallel line and each of the two high-voltage power line connection units is connected

The potentiometer 177 and YY are secreted internally via a 1417 high-speed interface and are controlled by a YA+ microcontroller. As shown in the illustration (AO), there are two contactless couplers Aor, 5500, and a high-voltage contact line FDD Sas 000 in order to perform the FDD redundancy function using one of the ARSTN© all underground line voltage 4080, which is of a three-phase type with lines (.8,5,1).As shown in the figure Demonstration BO is for applying/extracting the power line signal in different frequency bands using one anti-contact coupler 5008 coupler 1 and coupler 1; an immobilizer coupler 0000 can be used in which two BNC terminals 0 are suspended and can A 000 contactless coupler is used in which the 5407 connector is suspended in order to reduce costs by using the existing contactless coupler as is without modification.The remote meter reading system is described below using the FDD LS method according to an exemplary embodiment in detail.The terms or words used in the specification and claims should not be construed as confined to a dictionary definition but may be interpreted as meanings and concepts appropriate to the technical details of this invention. Illustrations 00-76 are diagrams to explain the configuration of a remote meter reading system using the FDD redundancy method according to Je's embodiment of this invention. Fig. + is a schematic diagram showing a remote meter reading system using FDD redundancy in the underground part according to an exemplary embodiment of the present invention. The data gathering Ye. 001 installed in the terrestrial or terrestrial switch 1 is an essential equipment

Ola - for the remote meter reading system using the FDD redundancy method. The data collection unit 001 lls gathering was configured to include the low voltage power line communication unit AFE 112 power line to obtain the low voltage line Underground which collects the data read by the low voltage power line connection from the ©01 watt-hour electronic meter installed in the To low voltage consumer group received from the grounded transformer; And the power line communication unit for the underground high-voltage line and the high-voltage 4 AFE, which supplies the FDD redundancy using the Atel line in the form of a spiral, which is part of the underground high-voltage line or the underground high-voltage line to transmit the readable data in the line part high voltage underground line hls as necessary; TDD redundancy and power supply All Ye. module Ye generates the current/voltage that passes through each Bang and AD 0400 converter to convert the analogue input to a digital input from the current/voltage converter monitor, 1310 sensor, and VV Ada communication interfaces; microcontroller microcontroller 181 that controls the peripherals and collects/processes/controls/transmits readable data and logically divides the high-voltage power line communication network 171 and the low-voltage power line communication network 6001 and manages each network; It manages devices in each network. The remote meter reading system using redundancy mode (71(1) includes a data gathering and transmission module 001 and a contactless coupler 5000 for FDD that can perform a 17010 redundancy at Negative line .2500 neutral line projected from underground Mall or high voltage line underground » and wireless communication units 1776 and 178 including the We Te transmission antenna that can be installed integrally In the outer box of the transformer in order to perform wireless communication in the underground high-voltage line segment; and server 60 remote meter reading +0 [i:11.

Yo -— ~ Exhibit 7 is a schematic diagram showing the communication network so that the data collection and transmission unit 1008 A acquires data read from consumer 0 which aly power from ground transformer ga Al.” of the power line connection method low voltage power line (as low voltage power line) and then transmits it to the data gathering unit and send it 0 _” installed in the ground transformer © 6006 0_ through high ground high voltage ground power line (oR phase) and network configuration Communications so that the data gathering unit b_B Ahlaser A001 and data gathering is installed in ground transformer 8 05001 which acquires data read from consumer 0 and which receives power from B 08 transformer 1 ground according to the low voltage power line connection method voltage power line and transmits it to the data gathering unit and send it 056 ©; and configure the remote meter reading system 0 using the FDD repetition method, acting as the TDD signaler, which reproduces the signal Poor power line connection due to drop between data gathering and transmission unit 8_0 and data gathering and transmission unit p_ 100¢. The contact coupler ale 5008 Bl and coupler 98 bal B2 high voltage 0 phase R apply/extract the power line communication signal for one frequency band and for two high voltage power line communication units 177 and 177 It performs the function of repetition 100 . When the condition of the communication channel is weak due to noise (Jie), the impulse noise at (R) phase, the mentioned system (Sef) can be applied to any single line that has a good communication channel environment through the power line, Je, voltage 13400, and the negative line, neutral line m tact (i.e. via Laie. (R,S,T,N) the line is used neutral line lal 0 ; no signal drop occurs due to protection layer, outer layer etc. and the current flowing in the line negative Ales” so that the maximum allowable can be lowered

vn - - for the current value of the contactless coupler 500 to a large extent. This is considered very economical because of the possibility of using a low-cost OV contact coupler using a small amount of the nano-crystal device. Exhibit A is a schematic diagram showing a communications network configuration such that the data gathering and transmission unit a 1 00_A installed on ground switch 8 A acquires data read from consumer 01 receiving power from the ground transformer ya Ale to the low voltage power line connection method and hence; transmits it to data gathering module 1008©_ installed on terrestrial switch 6006 ©0_ through data gathering module 100b_ 3 installed in terrestrial switch 6000 3g; and configure the communication network so that the Data Collection and Send Unit 0© installed in the grounded transformer #3700 acquires the data read from the consumer 30 receiving power from the grounded transformer “Be” 5 according to the low voltage power line connection method and transmit it to the data collection and transmission unit 06 ©_ installed in the ground transformer 056 C ¢ and configure the remote meter reading system 0 and using FDD LSI Ail until the two units of the high-voltage power line contact lead 177 and 1" of the data gathering and transmission unit b 3000 installed in switch 1 to terrestrial B 0 Repeater role 0 between the data gathering and transmission unit a Ales and the data gathering and transmission unit . C100c_ The advantage of using FDD redundancy method can reduce the delay instead of using TDD 0 redundancy method and can reduce the limitation of number of usable repeaters, thus realizing long continuity

l - run. Furthermore; The system can achieve the best power line communication performance with excellent diversity It can only use a good communication channel selectively from each phase of each part of the grounded transformer and each high voltage grounded power line (RS,TN). Exhibit 4 is a schematic diagram showing the configuration of a remote meter reading system© using FDD redundancy having a communication network configuration such that the data gathering and transmission unit acquires a AY installed in the switch 1 to ground A 00g Data read from consumer 0 who receives power from ground transformer Ales 8 according to the low voltage power line connection method and then transmits it to the data gathering and transmission unit 1008 ©_ installed in switch 6008 ©_ Vo by data gathering _ 1006 3 installed in switch 600b_B oa)! using afr + neutral line ; and configure a communications network so that the data collection and transmitter b 5001 installed in the ground transformer 5600 _3 acquires the read data from the consumer 51 who receives power from the ground transformer 58700 according to the low voltage power line connection method and transmits the read data to the Ye data gathering module ©_E100 installed in the ground switch 6008© ; and configure the remote meter reading system so that the HV power line communication units 7 and 117 of the data gathering and transmission unit 501 installed in transformer 1 to ground b Bir act as a repeater FDD between data gathering and dispatch aes unit 0p and data gathering unit 1006 0_ using neutral Ages line 0

M - In order to use the FDD redundancy mode which can sam long range transmission to the negative line (Af ++ neutral line) two anti-contact couplers (coupler _B1 500A and coupler 32 5000) are needed to input/extract signals which have different a bands.When this invention uses the negative AL line only, it is not possible to choose a different underground high voltage line having a good communication channel environment.However, this invention is suitable for long range transmission because the signal is attenuated In the negative line 8600 because of the protective layer, outer layer, etc. It is more economical because the low cost contactless coupler 500 can be manufactured. As shown in Exhibit 4 but it is a diagram to explain the remote meter reading Ve system using the FDD redundancy method in only one Alla is when a single contact fluid coupler (for example; bo vv) is used for line A 0e using Connector 4601© to use the existing 5000 contactless coupler as is The exemplary embodiments above using the attached drawings describe TDD or FDD redundancy due to data gathering and transmission unit 001 installed on the 6008 terrestrial switches (600b 0 6006 located on the middle elevations of three underground transformers (not shown in the photo) by connecting all 8,5,1 or by connecting them with each other. When there are more ground transformers Ter (eg JB when there is transformer D underground (not shown); the 100c_ 0 transmitter installed in the ground transformer C_ 600c can perform to FDD frequency or 00 frequency depending on the surrounding environment between grounded transformer 3[1006 0] and grounded transformer 0 (not shown).The concepts and principles can be applied to grounded HVL

vq - - is the entire high-voltage power line communication network | high voltage power line communication network 011 throughout the entire gia of the high voltage ground line that connects from one station and transmits the read data to the remote meter reading server Ve 7120/5 0 through the data collection unit gathering and send 0 which connects to the public network such as CDMA (WiBro © photo; ©1170 etc.); when requesting data read from a remote meter reading server FEP[o. a while this invention is described In connection with what are at present considered practical ideal embodiments, it shall be understood that the invention is not limited to the embodiments which have been disclosed but, on the contrary, aims to cover the various modifications and parallel arrangements which are included under the Essence and Scope Accordingly, the scope of the actual technical protection of this invention must be determined by the substance of the claims.

Claims (1)

Only protections 11 - The remote meter reading system includes a remote meter reading system using the repeat method :FDDY - Data gathering and transmission unit installed in a switch ¢ ground transformer It transmits readable data that is collected by a line communication method oo low voltage power dae Ge low voltage power line Watt / hour from consumer to 1 High-voltage line segment of an underground line 11 - A contactless coupler installed in the gia high voltage line of the line under A ground and supports FDD redundancy FDD using the remote meter reading system? Remote meter reading system 1 Y according to claim 1 where the data gathering and transmission module includes: YF - low voltage power line communicat which; collects the data read from the watt-hour meter installed in a consumer through the low voltage line pha© ; 1 > and an AD converter that converts readable data collected from the consumer through the 1 low voltage power line communicat network into digital A data ¢ 4 - A microcontroller that controls the low voltage power line communicat to collect the read data and acts as a control 11 to send the read data converted into digital data In the transformer AD to 1 part of the voltage line “dll” and the high voltage power line connection network M1 communication network 7 read data converted into digital data 04 is transmitted to eis high voltage line through at least one of phases 5,5,1 in part 9 high voltage line or negative line Neutral line according to the microcontroller control microcontroller 1 . FDD using the remote meter reading system? - Remote meter reading system 1 and its transmission as well: data gathering The data gathering unit includes Cua oY and the protection element Y "- - Al power supply module generates voltage DC or DCE necessary to apply; by the voltage supplied from the low voltage power line © on the secondary side of the transformer » and a communication interface that transmits 7 and receives data from an external station Jy. ¢- The remote meter reading system using the FDD-Y repetition method and documented for the protection element “where the data gathering and transmission unit also includes a sensor 7 that provides at least one of: a temperature sensor temperature :080; humidity sensor and door sensorlll « 0 and when the door is closed through the opening and closing data of the ground transducer based on the signal from the remote sensors; At least one of the voltage-gated power connections are interrupted Low/High Voltage powering the LED (and the power supply powering the 180” and 17/0014 A powering the LED which does not need to be monitored by the site operator.) 0 - Remote Meter Reading System meter reading system using the FDD redundancy method 7 according to protection element 7, where the low voltage power line communication network includes low the name : voltage power line communicat ~~ ¥ ; Ally low voltage power line communication unit collects data © Read through LV line segment; It acts as a microprocessor and an Ethernet bridge Ethernet bridge 1 Management low voltage power line communication network No line communicat and is updating the power line communication ¢ function low voltage power line 5E is connected to the low voltage power line A 4 for the low-voltage line segment and works to interrupt the voltage ops of the low-gall 0 power line and applies; It extracts and amplifies power line communication signals 1 . FDD using repeat mode remote meter reading system - 1 1 low voltage low-pass amplified ATE pursuant to protection element ©; where Y includes the energy on the transition side; It includes a low-end amplifier; and a low-pass filter; a Y half duplex filter at the receiving, a signal amplifier, and a half-duplex filter on the receiving side ¢ .side © FDD using the redundancy method, remote meter reading system (V) high voltage, where the high voltage power line communication network includes oF according to the protection element Y: The following is power line communication network High voltage power line communication module - DSP to which the Ethernet bridge function is added; Power line connection update and switch function; demodulation function FDD and redundancy function 1 vy — A - AFE high voltage underground power line underground set up to include a power amplifier on the transition side, a low profile amplifier, and a signal amplifier on the receiving side 0 to amplify the power line connection signal applied/ Extracting it through the ale coupling 1, the contact that connects the high-voltage power line or the negative line neutral line. A) - remote meter reading system using FDD redundancy mode “according to the element of protection” where the ADJ pad converts the voltage and current data from the “secondary” (low voltage) side of the grounded transformer indoor temperature data and humidity data of the bog-ground humidity data of the ground transformer opening or closing operator door of the ground transformer 1 digital data data.4) - Remote meter reading system using FDD redundancy method Y and documenting the oY protection element where the microcontroller manages the microcontroller communication network of the low voltage power line ¥ low voltage power line communicat ¢ 53 high voltage power line communication network ¢ and set peripheral memory©; performs the playback role on read data and monitored data, handles 1 and controls FDD 1 0 communication - a remote meter reading system using the “700 redundancy” method in accordance with claim 7; Where the data gathering unit divides the power line communication network into a low voltage power line communication network and a high ga ¢ high voltage power line communication network using a router vs — _© and a conversion function for the microcontroller . 11-1 remote meter reading system using the “repetition 200 according to protection element 1” method, where the contactless coupler applies and extracts Y power line communication signals from different frequency bands at the same time, by connecting two communication stations with one contactless coupler in order to apply signals that have different power line frequency bands. system 200 repetition method according to Clause 1 where the anti-contact coupler can receive and extract at the same time ¥ All power line communication signals have different frequency bands; by attaching link 1 in order to apply communication frequency bands signals The different power line oo 11 1- Remote meter reading system using the Y-repetition method 7101 according to protection element 1, in which an anti-contact coupler is formed from the power ov line connection unit with The high voltage power line communication has a redundancy function of £1100 and the high voltage power line communication © sang is formed from one or more power line communication chips. VE) - remote meter reading system with redundancy mode 00 under protection 1 also includes a filter displayed on the outside and inside of the data gathering 1 and transmitter and it filters the power line communication signal only for my bandwidth - vo — ; Can be used by the repeater installed in the data gathering module © to repeat the FDD 101 1 - The remote meter reading system using the “repetition 700” method according to the element of protection 11, where an outer box is provided for the YF data gathering unit and sent with a magnetic material To be attached to the internal metal structure of the steel structure of the ground transformer. 111- The remote meter reading system includes a remote meter reading system using the “repetition 100 according to protection element 1” method, as well as an integrally attached to the outside of the transformer deal ¥.