KR20100052855A - The transmission line watch diagnostic system and its method - Google Patents

Abstract

PURPOSE: A system for monitoring and diagnosing transmission lines and a method of the same are provided to transmit data from sensors which are connected through a network using ethernet which is built with overhead-ground-fiber cables. CONSTITUTION: A first sensor(110) is installed in a transmission line. The state of the transmission line is monitored. A second sensor(120) is attached to a transmission tower. The states of the transmission tower and an insulator are monitored. A collection unit(130) receives the data from the first sensor and the second sensor through wireless LAN communication and ZigBee-communication. A fiber junction box(140) receives the data from the collection unit. The communication protocol of the received data is converted and is transmitted to an upper level system though overhead-ground-fiber cables.

Description

Transmission line monitoring diagnostic system and its method {THE TRANSMISSION LINE WATCH DIAGNOSTIC SYSTEM AND ITS METHOD}

The present invention integrates the data received from a plurality of sensors for sensing the status of the transmission line and transmission tower and transmits to the substation or higher system through the Ethernet network constructed of the existing overhead fiber cable to monitor and monitor the transmission line and transmission tower remotely The present invention relates to a transmission line monitoring diagnostic system and a method thereof.

Existing power facilities are installed in the 1950's and 1960's, when the world's industrialized and emerging developing countries were established. They have a life span of about 40 to 50 years. If not, large-scale blackouts can occur, as in the case of the 2003 American Great War and the global major blackouts such as the UK and Russia.

Therefore, proper condition monitoring and maintenance of power equipment is required.

Currently, transmission line monitoring and diagnostic method is regularly visited by on-site maintenance personnel to check the transmission tower, and local power such as wind speed sensor and camera installed in the transmission tower is used to monitor the transmission line only by local monitoring.

As it relies on regional monitoring, it is difficult to diagnose the condition and failure of the entire transmission tower and transmission line, and it is difficult to prevent it.

In addition, in the case of transmission towers near substations or higher systems, a leased line or a code division multiple accedd (CDMA) method was used. However, when using a leased line, there is a problem that it is impossible to install nationwide due to high initial investment cost. Since charges are incurred depending on the frequency of use, it is difficult to use because of the high operating costs and the cost of monitoring a grid.

Therefore, there is a need for a monitoring diagnostic method capable of real-time monitoring of all transmission lines in the entire region using low cost for the transmission line, which is the center of the power system.

The present invention is to install a plurality of sensors in the transmission line and transmission tower in order to solve the problems of the prior art, by connecting each sensor to the network to transmit the collected data using an Ethernet network constructed by the existing overhead fiber optic cable The purpose of the present invention is to provide a transmission line monitoring diagnostic system and its method capable of monitoring in real time.

Transmission line monitoring diagnostic system and method thereof of the present invention to achieve the above object by configuring a plurality of sensors installed in the transmission line and the transmission tower in a network to measure and transmit the operating state, insulation state and environmental conditions of the transmission line Proper maintenance of facilities in accordance with the transition of transmission line status can prevent potential failures in the future.

In the present invention, the transmission line monitoring diagnostic system may include a first sensor unit mounted on the transmission line to monitor the state of the transmission line, and attached to the transmission tower to monitor a state of the transmission tower or insulator. And an aggregation device for receiving data of the first sensor unit and the second sensor unit through wireless LAN communication or Zigbee communication, receiving data of the aggregation device, and converting and processing a communication protocol of the received data. It may include a fiber junction box (FJB) for transmitting to the substation or higher system through the branch fiber optical cable (OPGW).

In the present invention, the aggregation apparatus may collect data received from a plurality of aggregation apparatuses through a Zigbee communication into one aggregation apparatus.

In the present invention, the data transmission of the assembly apparatus and the optical cable connection enclosure may use a communication protocol of the IEEE 1451 standard.

In the present invention, the first sensor unit may use a spherical sensor box including at least one sensor and a camera selected from a temperature sensor, a tilt sensor, a wind direction / wind sensor, and a current sensor in an enclosure formed of a plurality of solar cells.

In the present invention, the second sensor unit may be made of at least one sensor selected from an insulator sensor, a wind direction / wind sensor, a ground leakage sensor, a ground subsidence sensor, a tilt sensor, and a tension sensor.

In the present invention, the fiber junction box (FJB) may convert and transmit the communication protocol of the international standard IEEE 1451 of the data received from the concentrator into the communication protocol of the international standard IEC 61850.

In the present invention, the overhead line optical cable may be composed of a main line and a reserve line.

In addition, the present invention relates to a transmission line monitoring diagnostic method comprising the step of collecting data sensed from the first sensor unit and the second sensor unit for monitoring the transmission line and transmission tower to the concentrator through the sensor network, The data collected by the device is transmitted to the fiber junction box (FJB) through the Zigbee communication, and converts the communication protocol of the received data to the main network using the existing overhead line optical cable It may include transmitting to a substation or a higher system through.

In the present invention, the sensor network may include Zigbee communication or wireless LAN communication.

In the present invention, the collecting by the concentrator may further include collecting the data collected by the plurality of concentrators into one concentrator through a relay network.

In the present invention, the conversion of the communication protocol of the received data may convert the communication protocol of the international standard IEEE 1451 into the communication protocol of the international standard IEC 61850.

According to the present invention, by using the data transmitted through the sensor network, the relay network, and the main network in real time to monitor and diagnose the status of the transmission line and the transmission tower in real time, it is possible to prevent the power failure accident caused by equipment failure in advance. have.

In addition, by monitoring and diagnosing the status of the transmission line and the transmission tower in real time, the maintenance and maintenance of the transmission line and the transmission tower in accordance with the state in advance, there is an effect of extending the life and safety of the facility.

In addition, by applying international standards for the operation of the sensor network and the main network, interfacing to the interface is ensured, thereby making it easy to construct and manage facilities.

In addition, there is an effect that the installation cost is reduced by building a network using the existing transmission equipment and overhead cable.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In adding reference numerals to components of the following drawings, it is determined that the same components have the same reference numerals as much as possible even if displayed on different drawings, and it is determined that they may unnecessarily obscure the subject matter of the present invention. Detailed descriptions of well-known functions and configurations will be omitted.

1A to 1B are diagrams illustrating a transmission line monitoring and diagnosis system according to an exemplary embodiment of the present invention.

The power equipment is composed of a transmission line 100 for transporting electric power, a transmission tower 102 supporting the transmission line, an insulator for insulation, and a composite overhead line for transmitting data.

Referring to FIG. 1A, a system for monitoring a transmission line based on one transmission tower is shown. The first sensor unit 110, the second sensor unit 120, the assembly apparatus 130, and the optical cable connection enclosure 140 are shown. ).

The first sensor unit 110 is mounted on the transmission line 100, the temperature sensor, the tilt sensor in the interior of the enclosure formed of a plurality of solar cells in the enclosure and a plurality of solar cells in order to supply electricity autonomously At least one spherical sensor box including at least one sensor selected from a wind direction / wind speed sensor and a current sensor and a camera may be formed.

In more detail, the spherical sensor box is formed of a solar cell outside so that power supplied from the outside is not necessary, and the spherical sensor box is formed in a spherical shape to maintain the maximum area according to the positional movement of the sun to receive the most solar radiation.

In addition, a plurality of internal sensors monitor the current, wire temperature, outside temperature, inclination of the wire, wind direction / wind speed applied to the wire, and the wind direction, wind speed, forest fire, and freezing by the built-in camera. The surrounding environment of the transmission line 100 such as, and tree approach can be monitored.

In addition, the first sensor unit 110 may transmit data to the aggregation apparatus 130 by embedding a facility for WLAN communication therein.

The second sensor unit 120 is installed in the transmission tower 102 as an autonomous power supply structure for supplying electricity by solar power generation, the tension sensor 121, the transmission tower 102 to measure the tension applied to the transmission line 100. Pylon tilt sensor 122 for monitoring the slope of the ground, ground leakage monitoring sensor 123 for monitoring the leakage current flowing to the ground of the transmission tower 102, poor insulator monitoring sensor 124 for monitoring the failure of the insulator, and the transmission tower ( It consists of a ground subsidence detection sensor 125 for monitoring the ground state of the 102.

In addition, the sensing data of the second sensor unit 120 is collected by the first sensor unit 110 through wireless LAN (WLAN) communication and transmitted to the aggregation apparatus 130 or directly to the aggregation apparatus 130 through Zigbee communication. Is sent.

Accordingly, the first sensor unit 110, the second sensor unit 120, and the aggregation device 130 constitute one sensor network.

The sensor network is based on the international standard IEEE 1451. The sensor network can transmit / receive sensing information without additional communication facilities by transmitting and receiving modules embedded in each sensor.

In addition, the sensor network may apply power line communication according to a section, and power line communication may implement a method of wirelessly transmitting using a contactless coupler instead of a conventional contact coupler.

In addition, each sensor can solve a failure that occurs when using a wired supply method using an autonomous power supply method rather than a conventional wired supply method.

As an autonomous supply system, CT-POWER which can draw the electric current of the transmission line which is conducting electricity non-contactly can be used, and sunlight can be used for the transmission line which is not conducting current. In addition, a vibration generator can be used in the case of a facility with continuous movement, and the autonomous power supply method by vibration can apply MEMS (Micro Electro Mechanical Sensor) which can achieve miniaturization and low power of the sensor.

The aggregation device 130 is a place where data sensed by the first sensor unit 110 and the second sensor unit 120 are aggregated, and the aggregated data is connected to the optical cable connection enclosure 140 using a broadband high-speed transmission wireless LAN. It is transmitted to, and formed in the spherical sensor box constituting the first sensor unit 110, or may be configured separately in the transmission line 100 or the transmission tower (102).

In addition, although not limited, data collected by seven aggregate devices 130 may be aggregated into one aggregate device 130, and each aggregate device 130 may be configured as an ad-hoc by forming a relay network. It can transmit data by constructing in chain form by relaying data by hoc).

The optical cable connection enclosure 140 receives data collected by the aggregation device 130 through the sensor network using a communication protocol of the international standard IEEE 1451, and transmits the data to the optical cable connection enclosure 140, and the optical cable connection enclosure 140 Converts the communication protocol of the transmitted data into the international standard IEC 61850 and transmits it to the substation or higher system or power station through the existing overhead fiber optic cable (OPGW).

In addition, the processing branch line optical cable established in the optical cable connection enclosure 140 may be formed as a main line and a reserve line, and may operate using the reserve line even when the main line breaks down.

Looking at the communication protocol converted in the optical cable connection enclosure 140 in more detail, the data sensed by the first sensor unit 110 and the second sensor unit 120 is converted to digital and loaded on a TEDS frame that is a standard of IEEE1451. It is received by the assembly unit into the optical cable connection enclosure.

IEEE1451 has a standard specification for each sensor. Unspecified parts can be made according to the IEEE1451 standard and proposed and registered as a standard.

In addition, each data of the TEDS frame, the IEEE1451 standard, is mapped to the IEC 61850 data of the LN CDC standard in software and transmitted to a substation or a higher system.

At this time, the mapping program converts the data transmitted in the TEDS standard by connecting one-to-one to the CDC standard standard of NN (see FIG. 2).

Referring to FIG. 1B, a sensor network 200, a relay network 210, and a backbone network 230 formed by connecting a plurality of transmission towers 102 of FIG. 1A are illustrated.

The sensor network 200 collects data sensed by the first and second sensor units 110 and 120 formed in each transmission tower 102 and the transmission line 100 through a wireless LAN communication and a Zigbee communication. .

Then, the data of the assembly apparatus 130 of the transmission tower 102 in which the optical cable connection enclosure 140 does not exist is transmitted to and collected by the assembly apparatus 130 formed in the transmission tower 102 in which the optical cable connection enclosure 140 exists. However, the present invention is not limited to the present invention, but data of seven aggregation devices 130 may be aggregated in one aggregation device 130.

The relay network 210 transmits the final data collected in the aggregation apparatus 130 to the optical cable connection enclosure 140 using Zigbee communication.

The main network 220 uses an existing overhead fiber optic cable and converts a communication protocol of data in the optical cable connection enclosure 140 to transmit broadband high speed to a substation or a higher system.

According to the present invention, by adding an active network function to autonomously configure a network to each sensor, it is possible to minimize the cost burden of the existing network construction, the network design and operation burden, and to apply the IEEE 1541 standard. By pursuing the ease of interface, it can be used not only in the domestic market but also in the global market.

As described above, it has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

1A to 1B are diagrams illustrating a transmission line monitoring diagnosis system according to an embodiment of the present invention.

2 is a view showing a protocol conversion process of the optical cable connection enclosure according to an embodiment of the present invention.

             <Explanation of symbols for the main parts of the drawings>

100: transmission line 102: transmission tower

110: first sensor unit 120: second sensor unit

121: tension sensor 122: steel tower tilt sensor

123: ground leakage monitoring sensor 124: insulator monitoring sensor

125: ground subsidence sensor 130: assembly device

140: optical cable connection enclosure 200: sensor network

210: relay network 220: backbone network

230: substation or higher system

Claims (11)

A first sensor unit mounted on a transmission line and monitoring a state of the transmission line; A second sensor unit attached to the transmission tower and monitoring a state of the transmission tower or insulator; An aggregation device for receiving data of the first sensor unit and the second sensor unit through wireless LAN communication or Zigbee communication; And Transmission line monitoring and diagnostic system including an optical cable connection enclosure for receiving the data of the aggregation device, converts the communication protocol of the received data and transmits to the substation or higher system through the overhead line optical cable. The transmission line monitoring and diagnosing system according to claim 1, wherein the aggregation device collects data received from a plurality of aggregation devices into one aggregation device through Zigbee communication. The transmission line monitoring and diagnostic system according to claim 1, wherein the data transmission between the assembly apparatus and the optical cable connection enclosure uses a communication protocol of the IEEE 1451 standard. The method of claim 1, wherein the first sensor unit Transmission line monitoring and diagnostic system, characterized in that the spherical sensor box including a camera and one or more sensors selected from the temperature sensor, tilt sensor, wind direction / wind speed sensor and current sensor in the enclosure formed of a plurality of solar cells. The method of claim 1, wherein the second sensor unit A transmission line monitoring diagnostic system comprising at least one sensor selected from insulator detection sensor, wind direction / wind sensor, ground leakage detection sensor, ground subsidence detection sensor, tilt sensor, and tension sensor. The method of claim 1, wherein the fiber junction box (FJB) Transmission line monitoring and diagnostic system, characterized in that for converting the communication protocol of the international standard IEEE 1451 of the data received from the concentrator to the communication protocol of the international standard IEC 61850. The transmission line monitoring diagnostic system according to claim 1, wherein the overhead line optical cable is composed of a main line and a spare line. Collecting data sensed by the first sensor unit and the second sensor unit for monitoring the transmission line and the transmission tower to the concentrator through the sensor network; Transmitting data collected by the concentrator to a fiber junction box (FJB) through Zigbee communication; And And converting the communication protocol of the received data into a substation or a higher system through a main network using an existing overhead branch fiber optical cable. The method of claim 8, wherein the sensor network comprises ZigBee communication or WLAN communication. The method of claim 8, wherein in the collecting step Transmission line monitoring and diagnostic method further comprising the step of collecting data collected in a plurality of concentrators to a single concentrator through a relay network. The method of claim 8, wherein the conversion of the communication protocol of the received data A transmission line monitoring diagnostic method comprising converting a communication protocol of the international standard IEEE 1451 into a communication protocol of the international standard IEC 61850.

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