KR100571540B1 - Distribution automation communication terminal with PC modem - Google Patents

Abstract

The present invention provides remote monitoring and remote control of electrically connected devices, such as remote transmission of transformer operation data, identification of failure points of distribution lines, line breakers, and the like by using power line communication (PLC). Multi-purpose distribution automation system for meter reading is installed in each transformer column (electric pole with transformer) to collect meter reading data from each customer, and distribution automation communication terminal with PLC modem that collects transformer secondary voltage and current data. It is about.

When the distribution automation communication terminal proposed in the present invention is installed, a PLC modem for connecting and communicating with a power line when power is normally supplied, and a power line communication due to a cause such as a line accident or power line communication using a PLC modem If it is impossible to provide a distribution automation communication terminal used in the multi-purpose distribution automation system operated by RF wireless communication means used as a short-range communication means, it is possible to unify the data collection window of the distribution line operation, online.

Distribution Automation, Remote Meter Reading, Remote Monitoring, Line Failure, Transformer, PLC Modem, Wiring Automation Terminal

Description

Electric power supply automation communication terminal that have PLC modem             

1 is a view illustrating a state in which a distribution automation communication terminal incorporating a PLC modem proposed in the present invention is installed and used on a toilet seat.

2 is a block diagram of an embodiment of a distribution automation communication terminal incorporating a PLC modem in the present invention.

3 is a block diagram showing the inside of a PLC modem according to the present invention;

4 is a block diagram showing the inside of an RF module according to the present invention;

※ Explanation of code about main part of drawing ※

1: substation 100: transformer

200: variation owner 300: distribution automation terminal

301: identification information setting unit 302: PLC modem

303: I / O interface unit 304: RF module

305: CPU 306: battery

307: power switch

400: power distribution management system 410: PC interface

420: control PC 600: low voltage power line

The present invention provides remote monitoring and remote control of electrically connected devices, such as remote transmission of transformer operation data, identification of failure points of distribution lines, line breakers, and the like by using power line communication (PLC). Multi-purpose distribution automation system for meter reading is installed in each transformer column (electric pole with transformer) to collect meter reading data from each customer, and distribution automation communication terminal with PLC modem that collects transformer secondary voltage and current data. It is about.

More specifically, it is equipped with a PLC modem for connecting and communicating with a power line when power is normally supplied, and an RF wireless communication means used as a short range communication means when a power failure occurs due to a cause such as a line accident. The present invention relates to a distribution automation communication terminal used in a multipurpose distribution automation system that is operated.

In general, distribution automation is a remote monitoring and control system for distribution systems. It mainly monitors tripping of the circuit breaker, tracks the accident section in the event of a line accident, and remotely operates the circuit breaker to detect power outage ranges. Instantaneous range).

When a line accident occurs, a large fault current flows, so that the occurrence of the fault can be recognized by a monitoring relay of a line breaker or substation, and the above-described method of handling an accident takes into account the magnitude of the fault current or by line breaker. It detects the operation status and predicts the accident occurrence section, and it checks the accident occurrence section by the presence of abnormality by inputting the circuit breaker sequentially by section to separate the accident occurrence section.

When the accident occurrence section is confirmed, the cause of the accident is found and the place of occurrence of the accident is searched for the repair of the failure. If there is no report by the witness, there is a problem that a large area must be traversed. There is.

In addition, although it has been carried out by on-site inspection on a regular basis in order to perform various load management, temperature management, voltage management, and load unbalance management of transformers installed in each periphery, in recent years, distribution automation system that enables remote management by distribution automation Is being developed.

However, such a distribution automation system is capable of transmitting general information such as abnormality of transformers and devices connected to the secondary side of transformers, transmission of control signals from a remote management system of distribution automation system, and remote metering at a remote site. Distribution automation communication terminal to be provided is essentially provided.

Electricity, water, heavy water, hot water, gas, waste water, etc. are being measured by on-site measurement, and gradually changed to a remote metering system, and in the case of electricity, remote metering using a wireless mobile communication network such as CDMA, PCS, etc. The system has been developed and some remote metering of high pressure water is being implemented.

In case of low pressure reception, various methods of remote meter reading system using RF communication, telephone line, wired / wireless Internet, etc. have been proposed, but there is a problem that cannot be implemented due to the cost of construction of communication infrastructure and communication fees.

In addition, a method of constructing a multipurpose distribution automation system using an optical communication network has been developed. However, in order to construct an optical communication network, a lot of installation costs are consumed and economic efficiency is low, and a lot of production and development of distribution automation communication terminals used in an optical communication network are required. There is a problem of cost.

As described above, the monitoring data of the distribution load and the meter reading data of each consumer are acquired, and the collected data can be collected remotely through a predetermined wireless mobile communication network and the wired / wireless Internet. There is a problem such as the occurrence of costs required to build a communication line. In addition, the production of the distribution automation communication terminal that can be used in the above conditions has a problem that the manufacturing cost is expensive.

The present invention has been proposed to solve the problems of the prior art described above, and can be easily applied to a conventional system in which power is supplied from a substation to each transformer of a transformer, and the transformer is operated using power line communication. Multi-purpose distribution automation system for remote monitoring and remote control of electrically connected devices such as remote transmission of data, line breakers, and remote meter reading of the meter installed at each customer to be installed at each periphery to collect meter reading data from each customer. An object of the present invention is to provide a distribution automation communication terminal with a built-in PLC modem for collecting transformer secondary voltage and current data.

In particular, the present invention has a built-in PLC modem for connecting and communicating with a power line when power is normally supplied, and an RF wireless communication means used as a short-range communication means when a power failure occurs due to a cause such as a line accident. An object of the present invention is to provide a distribution automation communication terminal used in a multipurpose distribution automation system that is operated.

In addition, according to the present invention, by detecting the direction of the current flowing through the neutral wire of the common ground distribution line, it is possible to detect the exact position of the accident line, the ground fault location of the non-grounded distribution line is It is an object of the present invention to provide a distribution automation communication terminal that can detect the position of a ground fault in real time when a repetition of a PLC communication test or an unbalance of a phase voltage generated when a single line ground fault is found.

In order to solve the above technical problem, remote monitoring and remote control of electrically connected devices such as remote transmission of transformer operation data, identification of fault points of distribution lines, and line breakers using power line communication (PLC). Multi-distribution distribution automation system for control and remote metering of meter installed in each customer, installed on each periphery to collect meter reading data from each customer, and power distribution with PLC modem to collect transformer secondary voltage and current data It relates to an automated communication terminal.

More specifically, it is installed in each stool and can be easily applied to the conventional system which is supplied power from substation to transformer of each stool, and PLC to connect and communicate by power line when power is normally supplied. The present invention relates to a distribution automation communication terminal used in a multi-purpose distribution automation system operated by embedding an RF wireless communication means used as a short range communication means when a power failure occurs due to a modem and a cause such as a line accident.

The distribution automation communication terminal acquires control and meter reading data of the relevant device or monitoring data of the corresponding device through the monitoring of the secondary load of the transformer and the power line communication with the electricity meter, control device, and load switch electrically connected to the secondary of the transformer. Controls and relays the control signal of the distribution management system through short-range data communication, and relays and transmits the acquired data of other distribution automation communication terminals which have been transmitted and received.

The distribution automation communication terminal includes an identification information setting unit for setting its own identification information for identifying each distribution automation communication terminal and upper and lower terminal identification information to be communicated with, and a power amount electrically connected to the secondary side of the transformer, PLC modem unit which performs power line communication with devices such as control device and is connected to upper and lower power distribution automation communication terminal and power line, voltage detection means for detecting each phase voltage of transformer secondary, and secondary side of transformer Current detecting means for detecting each phase current, short-range wireless data communication means for performing short-range data communication when power failure or power line communication is not possible, and identification information set in the storing, processing and identification information setting section of the acquired data. According to the distribution data communication terminal or the distribution management system through the short-range data communication means Power supply to perform the short-range data communication to control the transmission of the data, the power supply battery and the secondary voltage of the transformer to charge the battery and switch to the battery power in case of emergency to enable the operation of the terminal It characterized in that it comprises a switching control unit.

In addition, the distribution automation communication terminal is to install a separate wire in the distribution line to enable the power line communication as a short-range communication means between the toilet and the periphery, inside the power line, such as the function of a condenser, line coupler or PLC repeater It should be configured to include a part that serves as an interface between PLC modems.

The line coupler filters only the information signal portion of the power signal (220V, 60Hz) and the information signal loaded on the power line and insulates the power signal from the PLC modem portion, and loads the information signal produced by the PLC modem on the power signal. Play a role.

In addition to the functions listed above, the distribution automation communication terminal acquires the operation data of the pole-type transformer, that is, obtains the current value of the neutral wire, acquires remote reading or detection data by power line communication, controls various switchgear by power line communication, and power quality (voltage management). And additional functions such as screening for loss of accidents or breach of contract power in conjunction with remote meter reading using monitoring, spot accident location and accident type remote, and PLC modem built-in electronic electricity meter. It is possible.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention configured and operated as described above are as follows.

1 is a view showing a distribution automation communication terminal with a built-in PLC modem proposed in the present invention is installed on the toilet seat.

It is connected to the secondary load monitoring means of the transformer 100 is electrically connected to the communication and is configured to include a PLC modem capable of power line communication with the adjacent distribution automation communication terminal 300 and each of the periphery 200 The distribution automation communication terminal 300 to be installed, the low-voltage power line 600 for data transmission between the distribution automation communication terminal, and stores, calculates, and processes the data transmitted from the distribution automation communication terminal 300, the distribution automation communication terminal It is composed of a power distribution management system 400 for controlling the devices connected to (300).

FIG. 2 is a block diagram of an embodiment of a distribution automation communication terminal incorporating a PLC modem. FIG. 3 is a block diagram of an internal PLC modem. FIG. 4 is a block diagram of an RF module. .

The distribution automation communication terminal 300 incorporating a PLC modem includes an identification information setting unit 301 in which its own identification information for identifying each distribution automation communication terminal and upper and lower terminal identification information to be communicated are set; PLC modem 302 which performs power line communication with devices such as electricity meter and control device electrically connected to the secondary side of transformer, and is connected to upper and lower power distribution automation communication terminal and low voltage power line 600, and transformer 100 A voltage detecting means 309 for detecting secondary phase voltages, a current detecting means 308 for detecting secondary phase currents of the transformer 100, and short-range data communication when power failure or power line communication is impossible According to the RF module 304 for performing and the identification information set in the storage, processing and identification information setting unit 301 of the acquired data, the corresponding distribution automation communication through the short-range data communication means The control unit 305 for performing short-range data communication with the terminal 300 or the power distribution management system 400 to control transmission of the corresponding data, a power supply battery 306, and a secondary voltage of the transformer 100 are supplied. The power supply switching unit 307 is configured to charge the battery 306 and switch to the power source of the battery 306 in an emergency to enable the operation of the distribution automation communication terminal 300.

The PLC modem 302 connected to the transformer secondary load means and the power line, and connected to the upper and lower power distribution automation communication terminal and the low voltage power line 600 is divided into three parts as shown in FIG.

The PLC modem 302 may be electrically connected to the secondary load means of the transformer 100 and receive control and current status data through power line communication with various controllers, load switches, power meters, and the like including the PLC modem. In case of PLC communication with, remote meter reading is possible. In addition, the PLC modem 302 may be connected to the upper distribution automation communication terminal, the lower distribution automation communication terminal and the low voltage power line 600 to perform data communication.

A '302a is connected to the upper distribution automation communication terminal 300, and can connect the low voltage power line 600 to any one of P1, P2, and P3, and B' 302b is the secondary side of the transformer 100. It is connected to the load monitoring means, C 302c is connected to the lower power distribution automation communication terminal 300 may connect the low voltage power line 600 to any one of P1, P2, P3.

The RF module 304 for short-range wireless communication includes a first RF communication unit 304a for communication with an upper distribution automation communication terminal 300 or a distribution management system 400 and a lower distribution automation communication terminal ( A communication channel of the second RF communication unit 304b for communication with the first communication unit 300b, the first communication channel unit 304c for setting the communication channel of the first RF communication unit 304a, and the second RF communication unit 304b. And a second communication channel section 304d.

When the power is normally supplied, the PLC modem 302 connected to the low voltage power line 600 is used. When the power failure occurs due to a cause such as a line accident or when the PLC modem 302 cannot be used, the RF module ( 304 is used for short-range wireless data communication.

The distribution automation communication terminal 300 is appropriately installed near the low-voltage power line of the periphery 200, RF data to be installed within the visible range with the upper or lower distribution automation communication terminal as possible in order to increase the communication reliability of short-range wireless communication. The wireless communication environment may be improved, and an antenna may be installed at an upper side of the stool column 200 to improve the RF data communication environment.

The distribution automation communication terminal 300 has one unique ID and IDs of upper and lower distribution automation communication terminals, one by one, and may have one or more as necessary. Such ID is set in the identification information setting unit 301, and the unique ID and the communication object identification information ID can be set or changed remotely in the setting or distribution management system 400 in the field.

In addition, the distribution automation communication terminal 300 basically defines a prescribed voltage, and transformer information such as capacity (rated current) and allowable temperature value of the transformer 100 managed by itself is set in the CPU 305, The regulated voltage and transformer information set in this way can be set by input at the site or remotely.

From the information of the transformer 100, when a problem occurs with respect to each of the secondary phase voltage, current value, etc. of the transformer 100, it is used as a condition for determining whether there is an abnormality and to determine whether an event occurs. When the above event occurs, it means when the voltage deviation or no-voltage (0V), the specified static load current exceeded, the temperature exceeded, the fault ground current is detected.

As described above, when the distribution automation communication terminal proposed in the present invention is installed, a PLC modem for connecting and communicating with a power line when power is normally supplied, and a power failure occurs due to a cause such as a line accident When power line communication using a modem is not possible, the distribution automation communication terminal used in the multipurpose distribution automation system operated by the RF wireless communication means used as a short-range communication means provides the unification and onlineization of the data collection window related to the operation of the distribution line. There is a possible effect.

In addition, the present invention can be remotely metered when using a distribution automation communication terminal in conjunction with a power meter using a PLC modem, without permission of the power company without permission and expansion (unauthorized expansion of electrical equipment without a separate contract with the power company or It is possible to obtain an effect that can detect a challenge behavior in real time.

In addition, the present invention has an effect that can detect the exact position of the line accident by detecting the direction of the current flowing in the neutral line of the common ground distribution line by installing the distribution automation communication terminal for each stool.

Claims (4)

delete (Correction) PLC modem unit which performs power line communication with device devices electrically connected to the secondary side of transformer and connected to upper and lower power distribution automation communication terminal and power line, and voltage detecting means for detecting voltage of each phase of secondary side of transformer And a current distribution means for detecting each phase current of the secondary side of the transformer and a distribution automation communication terminal or power distribution unit through a short range data communication means according to the identification information set in the storage, processing and identification information setting section of the acquired data. In the distribution automation communication terminal is composed of a control unit for performing the short-range data communication with the management system to control the transmission of the data, which is installed on the periphery column, Short-range wireless data communication means for performing short-range data communication with an adjacent distribution automation communication terminal or a distribution management system when a power failure or power line communication is impossible; A power supply battery for supplying power required for the short range wireless data communication means to operate; A power switching unit which charges the battery by receiving the voltage of the transformer secondary and switches the power of the battery in an emergency to enable the operation of the terminal; And an identification information setting unit configured to set its own identification information for identifying each distribution automation communication terminal and identification information of upper and lower terminals to be communicated with. (Correction) The method of claim 2, And said short-range wireless data communication means is an RF wireless communication means. (Correction) The method of claim 2, 12. A distribution automation communication terminal with a built-in PLC modem, characterized in that it includes or includes any one of a line coupler, a condenser, or a PLC repeater that serves as an interface between a power line and a PLC modem.

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