KR20230078413A - Frtu and dcu intergrated management system using gateway - Google Patents

Abstract

The present invention relates to an integrated feeder remote terminal unit (FRTU) and data concentration unit (DCU) management system using a gateway, which comprises: a transformer connected to a high-voltage line transmitting power along a utility pole to lower the voltage; an FRTU formed at the upper end part of the transformer to monitor the high-voltage line at an input terminal of the transformer between the high-voltage line and the transformer; a DCU formed at the lower end part of the transformer to monitor low-voltage lines connected from an output terminal of the transformer to a plurality of customers; a gateway connected to the FRTU and the DCU to constantly receive current information and voltage information for the low-voltage line and current information and voltage information for the high-voltage line to monitor the occurrence of abnormal signals; a power management server receiving abnormal signal occurrence information from the gateway when it is determined that the abnormal signal has occurred to cut off power supplied to the high-voltage line or low-voltage line and allow maintenance to be performed; and a manager terminal capable of receiving the abnormal signal occurrence information from the gateway or the power management server. According to the present invention, the present invention provides an effect of allowing maintenance to be quickly performed on defective parts.

Description

FRTU and DCU integrated management system using gateway {FRTU AND DCU INTERGRATED MANAGEMENT SYSTEM USING GATEWAY}

The present invention relates to an FRTU and DCU integrated management system using a gateway, and more particularly, by simultaneously monitoring the high-voltage cable connected to a transformer in the utility grid and the low-voltage cable connected to a meter from the output of the transformer to each home to obtain high-voltage cable information and It relates to an FRTU and DCU integrated management system using a gateway that enables quick maintenance in the event of an abnormality by transmitting low-tension line information to a management server that manages power in conjunction with low-tension line information.

Conventionally, the FRTU formed on the upper part of the transformer monitors only the current and voltage of the high-tension line connected to the transformer of the utility pole in the power system.

In addition, for the low-voltage line connected to the lower end of the transformer and connected to the customer, only current and voltage have been simply measured in order to charge a fee for the electricity used by the customer.

That is, as described above, the FRTU monitors only the current and voltage for the high-voltage line connected to the transformer of the utility pole in the power system, and the current and voltage for the low-voltage line connected to the lower end of the transformer and connected to the consumer are not monitored. When an abnormality occurs in the low voltage line, it is not easy to determine the location of the corresponding low voltage line.

Republic of Korea Patent Publication No. 10-2011-0067995 (2011.06.22)

In order to solve the above problems, the present invention connects a gateway between the FRTU monitoring the high-voltage line and the DCU monitoring the low-voltage line, and manages power by interlocking the high-voltage line information monitored by the FRTU with the low-voltage line information monitored by the DCU The purpose is to provide an integrated FRTU and DCU management system using a gateway so that the administrator can simultaneously grasp the status of high-voltage and low-voltage lines through the management server.

In order to achieve the above object, the FRTU and DCU integrated management system using a gateway according to the present invention includes a transformer that is connected to a high-voltage line for transmitting power along an electric pole to drop a voltage; an FRTU formed at an upper end of the transformer to monitor the high voltage line at the input end of the corresponding transformer between the high voltage line and the transformer; a DCU formed at a lower end of the transformer and monitoring a low-voltage line connected to a plurality of consumers at an output end of the transformer; a gateway connected to the FRTU and the DCU to constantly receive current information and voltage information about the low-voltage cable and current information and voltage information about the high-voltage cable and monitor the occurrence of an abnormal signal; When it is determined that an abnormal signal has occurred, a power management server that receives the abnormal signal generation information from the gateway, cuts off power supplied to the high-voltage cable or low-voltage cable, and performs maintenance; and a manager terminal capable of receiving abnormal signal generation information from the gateway or the power management server.

Preferably, in order to achieve the above object, the gateway of the FRTU and DCU integrated management system using the gateway according to the present invention communicates with the FRUT and the DCU, and current information and voltage information for the high voltage cable measured by the FRTU a short-distance communication unit for receiving and receiving current information and voltage information about the low-voltage line measured by the DCU; a remote communication unit that monitors the high-voltage line and the low-voltage line at set intervals and transmits a corresponding abnormal signal to the power management server or manager terminal when an abnormal signal is generated; Current information and voltage information on the high-voltage cable received through the short-distance communication unit are compared with thresholds stored in the high-voltage cable threshold DB, and if the upper and lower limits of the threshold are exceeded, it is determined as an abnormal signal, and the current on the low-voltage line received through the short-range communication unit and a main control unit that compares information and voltage information with thresholds stored in the low-voltage line threshold DB and determines that an abnormal signal is exceeded when the upper and lower limits of the threshold are exceeded.

More preferably, the FRTU of the FRTU and DCU integrated management system using the gateway according to the present invention for achieving the above object includes a high-voltage cable CT configured with a Rogowski coil therein to measure the current of the high-voltage cable; a high voltage cable PT for measuring the voltage of the high voltage cable; and a first communication unit that transmits current information measured by the high voltage cable CT and voltage information measured by the high voltage cable PT to the power management server or gateway, wherein the DCU measures the current of the low voltage cable connected from the transformer to the consumer. low voltage line CT; a low voltage line PT for measuring the voltage of the low voltage line; a second communication unit which transmits current information measured by the low voltage line CT and voltage information measured by the low voltage line PC to the gateway; and an EMU generating and transmitting an abnormal signal to the gateway when the current measured by the low voltage line CT and the voltage measured by the low voltage line PT are below or above a threshold value.

The FRTU and DCU integrated management system using the gateway according to the present invention connects the gateway between the FRTU monitoring the high-voltage line and the DCU monitoring the low-voltage line, and interlocks the high-voltage line information monitored by the FRTU with the low-voltage line information monitored by the DCU to save power. By providing it as a management server to manage, there is an effect of allowing the manager monitoring the management server to quickly perform maintenance on the part where an error occurs.

1 is a configuration diagram of an FRTU and DCU integrated management system using a gateway according to the present invention.
2 is a detailed block diagram of an FRTU and DCU integrated management system using a gateway according to the present invention.
3 is a diagram for explaining data sharing between gateways of an FRTU and DCU integrated management system using a gateway according to the present invention.

The terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to explain their invention in the best way. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, they can be substituted at the time of this application It should be understood that there may be many equivalents and variations.

Hereinafter, a FRTU and DCU integrated management system using a gateway according to the present invention will be described with reference to the accompanying drawings.

1 is a diagram of an FRTU and DCU integrated management system using a gateway according to the present invention.

As shown in FIG. 1, the FRTU and DCU integrated management system using the gateway according to the present invention includes a transformer 100, FRTU 200, DCU 300, gateway 400, power management server 500, and manager terminal (600).

The FRTU (Feeder Remote Terminal Unit 200) is formed on the upper part of the transformer 100 at predetermined distances (ex> 4 km in the city center, 8 km outside the city) and connects the high-voltage line at the input end between the three-phase high-voltage line connected from the pole and the transformer watch over

That is, the FRTU 200 includes a component corresponding to a control unit not shown therein, measures the voltage and current flowing through the high-voltage cable while monitoring the high-voltage cable, determines whether or not it is within the allowable range based on a threshold value, If it is out of range, it is judged that there is a problem with the high-voltage cable.

For example, if the allowable range is ±30% based on the threshold value of 100, if the voltage or current value is within the 70≤critical tolerance≤130, it is in a normal state, and if it is out of the tolerance range, it is judged that a problem has occurred. .

The power management server 500 blocks the current flowing through the high-tension cable when the voltage value of the high-tension cable and the voltage value are out of the permissible range and the problem determination information is received from the FRTU 200 .

In addition, the power management server 500 can easily identify a faulty section when a problem occurs because the FRTUs 200 are installed in a plurality of sections at predetermined distances.

The FRTU 200 may directly transmit problem occurrence information to the power management server 500 or to the gateway 400 as in the prior art when a problem occurs because the measured voltage or current value is out of the allowable range. .

More specifically, the inside of the FRTU (200) includes a high-voltage cable CT (210) composed of a Rogowski coil to measure the current of the high-voltage cable and a high-voltage cable PT (220) to measure the voltage of the high-voltage cable, so that the current and voltage flowing through the high-voltage cable is measured and constantly monitored.

The FRTU (200) includes a first communication unit (230) and transmits current information and voltage information measured by the high voltage cable CT (210) and the high voltage cable PC (220) to the power management server (500) and gateway (400) do.

The first communication unit 230 is equipped with an IoT communication modem to enable short-distance communication in the communication range as shown in Table 1 below, and also has an LTE communication modem to enable long-distance communication, and long-distance communication by PLC communication. It is also possible.

IOT communication technology LoRa LTE-M NB-IOT communication range ~11km ~11km ~15km frequency band 8 to 900 MHz
~500KHz LTE frequency 1.4MHz ~150 Kbps communication speed ~10kps ~1 Mbps ~150 Kbps Roaming NO YES YES battery life ~10 years ~10 years ~10 years

The first communication unit 230 is not limited to IoT communication and LTE communication, and may be configured with other communication modems in a modular form as needed.

On the other hand, when installing the FRTU 200, the threshold value and tolerance range can be set differently by an installer.

The DCU (Data Concentration Unit 300) is formed at the lower output stage of the transformer and monitors low voltage lines connected to a plurality of consumers.

Inside the DCU 300, a low voltage line CT 310, a low voltage line PT 320, a second communication unit 330, and an EMU (Energy Management Unit 340) are mounted.

The low voltage line CT 310 measures the current flowing in the low voltage line connected from the output end of the transformer to the meter of each customer, and the low voltage line PT 320 measures the voltage flowing in the low voltage line connected from the output end of the transformer to the meter of each customer. do.

The EMU 340 converts the current measured by the low-voltage line CT 310 and the voltage measured by the low-voltage line PT 320 into a current voltage below or above the threshold value, and a ground fault electrically grounded as the low-voltage line is cut and contacted with the ground. The sudden change in voltage and current due to the abnormality is judged as an abnormal signal and transmitted to the gateway 400 to notify the occurrence of an abnormality.

Regarding determining the current voltage below or above the threshold value for the low voltage line, the EMU 340 measures the voltage and current flowing in the low voltage line while monitoring the low voltage line as mentioned in the description of the FRTU 200, and measures the threshold value It is determined whether or not it is within the allowable range as a standard, and if it is out of the allowable range, it is determined that a problem has occurred in the low voltage line and an abnormal signal is transmitted to the gateway 400 .

The gateway 400 is connected to the FRTU 200 and the DCU 300 to receive information about the high-voltage cable and information about the low-voltage cable, and determines and monitors abnormal information about the high-voltage cable and abnormal information about the low-voltage cable.

More specifically, the gateway 400 includes a second communication unit 410 composed of a short-distance communication unit 411 and a long-distance communication unit 412 and a main control unit 23 .

The third communication unit 410 communicates with the FRUT 200 and the DCU 300 through the short-range communication unit 411 and receives current information and voltage information about the high voltage cable measured by the FRTU 200, Current information and voltage information about the low voltage line measured by the DCU 300 are received.

Although it has been described above that the EMD 340 of the DCU 300 determines the abnormal signal for the low voltage line, it is not limited thereto, and the EMD 340 is loaded and measured. When it is difficult to determine the signal, the gateway 400 can also determine the abnormal signal for the measured current information and voltage information with the threshold value stored in the DB.

That is, the main control unit 420 compares the current information and voltage information on the high-voltage cable received through the short-range communication unit 411 with the threshold stored in the high-voltage cable threshold DB 430, and when the upper and lower limits of the threshold are exceeded, an abnormal signal is signaled. can be judged by

In addition, the main control unit 420 compares the current information and voltage information on the low voltage line received through the short range communication unit 411 with the threshold stored in the low voltage line threshold DB 440, and when the upper and lower limits of the threshold are exceeded, an abnormal signal is signaled. can be judged by

As described above, the gateway 400 integrally monitors the current and voltage of the high-voltage line and the low-voltage line, and when an abnormal signal is generated for the high-voltage line, the low-voltage line connected to the high-voltage line is monitored to identify the low-voltage line generating the abnormal signal, thereby identifying the fault location. can be clearly ascertained.

Conversely, when the gateway 400 detects an abnormal signal of the low voltage line, it can monitor whether an abnormal signal is also detected for the high voltage line connected to the low voltage line, and when the abnormal signal for the high voltage line is not detected, the DCU 300 It is determined that the problem is only with the low-voltage line connected to the consumer's meter.

As described above, the gateway 400 monitors the high-voltage line and the low-voltage line at predetermined time intervals, and when an abnormal signal is generated, it is transmitted to the power management server 500 so that an administrator can take action.

In particular, in the present invention, while the gateway 400 integrally monitors the low-voltage line and the high-voltage line, clearly confirms whether an abnormal signal has occurred in the low-voltage line or the high-voltage line, and transmits it to the power management server 500, thereby managing the high-voltage line and the low-voltage line. It is virtual, but it allows quick action to be taken.

Meanwhile, the gateway 400 notifies the manager terminal 600 of the abnormal signal through the remote communication unit 412 when an abnormal signal is generated while monitoring the high-voltage cable and the low-voltage cable at predetermined time intervals, so that time and place are not limited. and enable rapid action to be taken.

The power management server 500 may correspond to a KEPCO server that manages power use, a server of a consignment company that sells electricity to consumers, and the like. Dispatch to the point where it occurred and inspect it so that it can be maintained.

The manager terminal 600 is a terminal possessed by a manager who manages a high-voltage cable or a manager who manages a low-voltage cable, and may be a terminal corresponding to a mobile phone, a laptop computer, a tablet PC, or the like.

As mentioned above, the manager terminal 600 can be notified of abnormal signals generated from high-voltage and low-voltage lines in the form of an alarm or message through remote communication with the gateway 400, and the manager receiving the notification can take quick action. make it possible to take

At this time, in the message, among the plurality of FRTUs 200 installed for each section, according to which FRTU is the abnormal signal for the current and voltage detected, information on the location of the section of the high voltage cable and which DCU is the abnormal signal for the current and voltage detected Accordingly, it is desirable to include accurate location information of which low voltage line is connected to which consumer.

Meanwhile, the gateway 400 according to the present invention shares the abnormal signal generation information for the high-voltage cable and the abnormal signal generation information for the low-voltage cable between neighboring gateways through the short-range communication unit 411, as shown in FIG. 3 .

As described above, since the gateway 400 shares information between neighboring gateways, when a problem occurs or a communication failure occurs in the remote communication unit 412 of the gateway, an abnormality first occurs with the neighboring gateway through the short-range communication unit 412. Signal generation information may be transmitted and transmitted to the power management server 500 or the manager terminal 600 through the remote communication unit 412 of a neighboring gateway.

In the above, the technical idea of the present invention has been described together with the accompanying drawings, but this is an illustrative example of a preferred embodiment of the present invention, but does not limit the present invention. In addition, it is obvious that various modifications and imitations can be made by anyone having ordinary knowledge in the technical field to which the present invention belongs without departing from the scope of the technical idea of the present invention.

100: transformer
200: FRTU
210: high voltage cable CT
220: high voltage cable PT
230: first communication unit
300: DCU
310: low voltage line CT
320: low voltage line PT
330: second communication unit
340: EMD
400: gateway
410: third communication unit
411: short-distance communication department
412: telecommunications department
420: main fisherman
430: high voltage line critical DB
440: low voltage line critical DB
500: power management server
600: manager terminal

Claims (6)

A transformer that is connected to a high-voltage line that transmits power along the pole to drop the voltage;
an FRTU formed at an upper end of the transformer to monitor the high voltage line at the input end of the corresponding transformer between the high voltage line and the transformer;
a DCU formed at a lower end of the transformer and monitoring a low-voltage line connected to a plurality of consumers at an output end of the transformer;
a gateway connected to the FRTU and the DCU to constantly receive current information and voltage information about the low-voltage cable and current information and voltage information about the high-voltage cable and monitor the occurrence of an abnormal signal; and
When it is determined that an abnormal signal has occurred, a power management server for receiving the abnormal signal generation information from the gateway and cutting off power supplied to the high-voltage cable or low-voltage cable and performing maintenance; FRTU using a gateway comprising: and DCU integrated management system.
According to claim 1,
An FRTU and DCU integrated management system using a gateway further comprising a manager terminal capable of receiving abnormal signal generation information from the gateway or the power management server.
According to claim 2,
The FRTU is
Inside, a high-voltage cable CT composed of a Rogowski coil to measure the current of the high-voltage cable;
a high voltage cable PT for measuring the voltage of the high voltage cable; and
A first communication unit for transmitting the current information measured by the high-voltage cable CT and the voltage information measured by the high-voltage cable PT to the power management server or gateway; FRTU and DCU integrated management system using a gateway comprising a.
According to claim 3,
The DCU is
a low-voltage line CT measuring a current of a low-voltage line connected from the transformer to a consumer;
a low voltage line PT for measuring the voltage of the low voltage line;
a second communication unit which transmits current information measured by the low voltage line CT and voltage information measured by the low voltage line PC to the gateway; and
An EMU generating an abnormal signal and transmitting it to the gateway when the current measured by the low voltage line CT and the voltage measured by the low voltage line PT are below or above the threshold value; FRTU and DCU integrated management system using a gateway comprising: .
According to claim 4,
The gateway
a short-distance communication unit communicating with the FRUT and the DCU, receiving current information and voltage information on the high voltage cable measured by the FRTU, and receiving current information and voltage information on the low voltage cable measured by the DCU;
a remote communication unit that monitors the high-voltage line and the low-voltage line at set intervals and transmits a corresponding abnormal signal to the power management server or manager terminal when an abnormal signal is generated;
Current information and voltage information on the high-voltage cable received through the short-distance communication unit are compared with thresholds stored in the high-voltage cable threshold DB, and if the upper and lower limits of the threshold are exceeded, it is determined as an abnormal signal, and the current on the low-voltage line received through the short-range communication unit FRTU and DCU integrated management system using a gateway comprising: a main control unit that compares information and voltage information with thresholds stored in the low-voltage line threshold DB and determines that an abnormal signal is out of the upper and lower limits of the threshold.
According to claim 5,
The gateway
An FRTU and DCU integrated management system using a gateway, characterized in that for sharing the abnormal signal generation information for the high-voltage cable and the abnormal signal generation information for the low-voltage cable between neighboring gateways through a short-range communication unit.

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