KR100683246B1 - Automated electric power distribution system and fixed wireless bridge communication apparatus for the system - Google Patents

Abstract

An electric power distribution automation system and a fixed wireless bridge communication apparatus for the same are provided to reduce an optical communication network installation cost by introducing a fixed wireless bridge communication technology to the system and to enlarge a range of a distribution automation installation area by automating a distribution line switchgear in the area not to install the optical communication network. A fixed wireless bridge communication apparatus for an electric power distribution automation system includes an automation control interface(720), an automation interface(730), a fixed wireless bridge module(710), and a fixed wireless bridge control unit(740). The automation control interface(720) receives an electric power distribution automation control signal from an electric power distribution automation control device. The automation interface(730) transmits the received electric power distribution automation control signal to the electric power distribution automation control device. The fixed wireless bridge module(710) transceives the electric power distribution automation control signal to a second wireless communication device through a fixed wireless bridge frequency band. The fixed wireless bridge control unit(740) performs transfer of the electric power distribution automation control signal and protocol conversion between the automation control interface(720), the automation interface(730), and the fixed wireless bridge module(710).

Description

AUTOMATTED ELECTRIC POWER DISTRIBUTION SYSTEM AND FIXED WIRELESS BRIDGE COMMUNICATION APPARATUS FOR THE SYSTEM}

1 is a diagram illustrating a general configuration of a distribution line.

2 is a diagram illustrating a configuration of a conventional power distribution automation system based on an optical communication network.

3 is a view showing in detail the internal configuration and connection method of a distribution automation device connected to a conventional optical communication network.

4 is a diagram illustrating a network configuration of a distribution automation system according to an embodiment of the present invention.

5 is a view illustrating in detail the internal configuration and connection method of the distribution automation device connected to the optical communication network of FIG.

6 is a diagram illustrating a network configuration of a distribution automation system according to another embodiment of the present invention.

7 is a block diagram showing an internal configuration of a fixed wireless bridge communication apparatus according to an embodiment of the present invention.

8A to 8D are diagrams schematically illustrating a method of installing a fixed wireless bridge communication apparatus on an electric pole according to an embodiment of the present invention.

9A to 9B illustrate a method of connecting a plurality of fixed wireless bridge communication apparatuses according to an embodiment of the present invention.

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

100: distribution line 200: optical communication network

210, 410, 610: distribution automation controller 310: remote device

320: automation recloser 330: automation switch

620, 630: FWB communication area 700: FWB communication device

710: FWB module 720: automation controller interface

730: automation device interface 740: FWB control unit

701: port for automation controller 702: port for automation equipment

The present invention relates to a network configuration of a distribution automation system, and more particularly, to a system for transmitting and receiving a distribution automation control signal through a wireless communication device having a fixed wireless bridge function and a configuration of the wireless communication device.

Electrical energy, which is widely used in various industries today, is produced and transported through a system called electric power system. The electrical energy produced by various types of power plants is delivered to the power distribution facilities through high voltage transmission facilities and substations, and the power distribution facilities supply the received electric energy back to each customer. Consumers receive electrical energy from distribution facilities through distribution lines and use them to drive various electrical devices.

1 is a diagram illustrating a general configuration of a distribution line. As shown in FIG. 1, a plurality of distribution line switchgear devices are located on the distribution line 100 leading from the power distribution facility to the customer, thereby connecting or separating each of the complicated lines.

There are several types of switchgear located on the power distribution line. The normal open switch 130 shown in FIG. 1 is located in the end of the track, which is characterized in that it is normally open. On the road connected to the normally open switch 130 is a general automatic switch (G / A) 120 is located. On the other hand, the automation recloser (R / A) 110 is connected to one or more switchgear 130 is a device for controlling the opening and closing state of the distribution line by repeating the blocking and closing operation by itself when detecting the fault current.

Before the distribution automation system was introduced, if a failure occurred in one of a large number of switchgear devices located throughout the distribution line, a report was received from the user who detected the failure, and the management personnel visited the site of failure to check the connection status of the switchgear directly. There was a hassle to adjust.

Accordingly, a distribution automation system for automating the failure detection and recovery process of the distribution line switchgear has been proposed, and a distribution automation system based on an optical communication network is widely used.

2 illustrates a network configuration of a conventional power distribution automation system based on an optical communication network. Referring to FIG. 2, a plurality of distribution line switchgear devices are connected to one optical communication network 200 having a ring-type topology and controlled by a distribution automation controller installed at a branch or a branch of KEPCO. The switchgear is combined with a remote controller terminal (FRTU) and the like to configure a distribution automation device, and is connected to the optical communication network 200 to transmit a failure of the switchgear to the distribution automation controller 210 or In accordance with the distribution automation control signal received from the automation controller 210 performs the opening and closing operation.

3 illustrates the internal configuration and connection method of the distribution automation device connected to the optical communication network in more detail. As shown in FIG. 3, the automation device of the conventional power distribution automation system is connected to the optical communication network 200 through a remote terminal 310. In addition, the distribution automation device is connected to the remote device 310 by a short-range wired communication method, for example, a serial communication method.

An automatic recloser 320, which is a kind of a distribution automation device, includes a recloser body 322 and a recloser controller 321 that perform a mechanical opening and closing operation. Similarly, the automation switch 330 is composed of a switch body 332 and a remote control terminal 331 for generating a fault current in the event of a failure. Each of the recloser control unit 321 and the remote control terminal device 331 detects and transmits a failure of the recloser 320 or the switch 330 to the distribution automation controller 210 through the optical communication network 200. A control signal for controlling the opening and closing operations of the opening and closing devices 322 and 332 is received from the automated controller 210 and the opening and closing devices 322 and 332 are controlled accordingly.

Although not shown in FIG. 2, the distribution automation controller 210 is connected to a central office terminal (COT) on the optical communication network 200.

However, as shown in FIG. 2, a conventional distribution automation system based on the optical network 200 may be required to install a plurality of optical network rings to control a large number of switchgear irregularly scattered over a large area. In this case, the installation cost and maintenance cost of the optical communication network may increase. As it is well known, the cost of laying and maintaining an optical communication network is very large, and operation of the optical communication network becomes very inefficient when the number of switching devices connected to a single optical network ring is small.

In addition, automating distribution facilities in areas where optical cables are difficult to embed and cannot be connected to an optical communication network is one of the difficult problems of the conventional distribution automation system. In view of the 50% automation rate of the switchgear in Korea, the above problems of the optical communication network can be a significant limitation in increasing the switchgear automation rate.

Therefore, research on a technology for reducing the installation and operation costs of the distribution automation system and enabling stable operation of the distribution system by incorporating a switchgear of a wider area into the distribution automation system has been requested.

In order to solve the above problems, the present invention proposes a new technology for configuring a network of a distribution automation system using fixed wireless bridge communication.

The present invention has been made to improve the prior art as described above, and an object thereof is to provide a network configuration of a distribution automation system that reduces the installation and operation cost of the distribution automation system.

In addition, an object of the present invention is to expand the installation area of the distribution automation system to improve the operational stability of the entire distribution system.

In addition, an object of the present invention is to enable the flexible operation of the distribution automation system by removing the installation area restriction of the distribution automation equipment to be newly installed.

It is also an object of the present invention to provide a configuration of a fixed wireless bridge communication apparatus applicable to a distribution automation system.

It is also an object of the present invention to provide a method for efficiently arranging one or a plurality of devices in installing a fixed wireless bridge communication apparatus on a pole.

Another object of the present invention is to secure a wireless communication area of various types by providing a method of connecting a plurality of fixed wireless bridge communication devices.

In order to achieve the above object and to solve the above-mentioned problems of the prior art, the wireless communication apparatus according to the present invention is an automation controller interface for receiving a distribution automation control signal from the distribution automation controller, distribution of the received distribution automation control signal An automation device interface for transmitting to an automation device, a fixed wireless bridge module for transmitting and receiving a distribution automation control signal to and from the second wireless communication device using a fixed wireless bridge frequency band, and the automation controller interface, the automation device interface and the fixed wireless It characterized in that it comprises a fixed wireless bridge control unit for transferring the distribution automation control signal and protocol conversion between the bridge module.

In addition, the distribution automation system according to the present invention receives a distribution automation control signal from a distribution automation controller connected to a backbone network or a fixed wireless bridge communication network, the second wireless communication via the fixed distribution wireless control network A first wireless communication device for transmitting to the device, and a second wireless communication device for receiving the distribution automation control signal through the fixed wireless bridge communication network and transmitting the received distribution automation control signal to the distribution automation device. .

In addition, the wireless communication system according to the present invention includes a first fixed wireless bridge communication device and a second fixed wireless bridge communication device each including a port for an automated controller device and a port for an automation device of a short-range wired communication method, the first fixed The port for the automation device of the wireless bridge communication device is connected to the port for the automation controller of the second fixed wireless bridge communication device, and the first fixed wireless bridge communication device is connected to the second fixed wireless bridge communication device through the port for the connected automation device. The distribution automation control signal is characterized in that for transmitting.

In addition, the pole-mounted installation method of the fixed wireless bridge communication device for distribution automation according to the present invention is characterized in that the fixed wireless bridge communication device is installed so that the directional antenna included in the device is parallel to the vertical section of the pole.

Hereinafter, with reference to the accompanying drawings, a fixed wireless bridge communication apparatus according to the present invention, a distribution automation system configured using the apparatus, a wireless communication system configured by interconnecting a plurality of the devices, and installing the apparatus on the pole The method will be described in detail.

4 is a diagram illustrating a network configuration of a distribution automation system according to an embodiment of the present invention. Specifically, FIG. 4 illustrates a network configuration in which a distribution automation area is extended using an optical communication network constituting a conventional distribution automation system as a backbone network.

As shown in FIG. 4, the distribution automation system according to the present embodiment includes a distribution automation controller 410 connected to the central unit 401 of the optical network ring 400. The distribution automation controller 410 transmits a distribution automation control signal directly through the optical communication network to the distribution automation devices connected to the remote device 402 on the optical communication network. Meanwhile, the distribution automation devices not connected to the optical communication network ring 400 receive the distribution automation control signal through the fixed wireless bridge communication.

Fixed Wireless Bridge (FWB) is a term that refers to a wireless communication method that performs node-to-node communication and repeating through a radio frequency band using a fixed wireless communication device. Broadband Wireless Access (BWA), Wireless LAN (WLAN), and the like.

A fixed wireless bridge communication apparatus (FWB communication apparatus, hereinafter referred to as "FWB communication apparatus") is connected to the central apparatus 401 or the remote apparatus 402 on the optical network ring 400. The FWB communication device 421 connected to the central device 401 also receives the distribution automation control signal from the distribution automation controller 410 connected to the central device 401, and thus, the other FWB communication devices located in the communication area 420. Transmit over the FWB frequency band (422, 423). The FWB communication devices 422 and 423 receiving the distribution automation control signal transmit the received control signal to the distribution automation device connected to each of the FWB communication devices 422 and 423 to perform distribution automation.

Meanwhile, the FWB communication device 431 connected to the remote device 402 receives the distribution automation control signal through the optical communication network, and simultaneously transmits the received control signal to the distribution automation device directly connected to the FWB communication device 431. In addition, other FWB communication devices 432 and 433 located in the communication area 430 of the FWB communication device 431 transmit through the FWB frequency band. The FWB communication devices 432 and 433 receiving the distribution automation control signal transmit the received control signal to the distribution automation device connected to each of the FWB communication devices 432 and 433.

In addition, the distribution automation device not connected to the optical communication network may also be connected to another distribution automation device not connected to the optical communication network through FWB communication. Referring to FIG. 4, the FWB communication device 433 transmits a distribution automation control signal received from the FWB communication device 431 connected to the remote device 402 to a distribution automation device connected to the FWB communication device 431. Although not included in the communication area 430 of the FWB communication device 433 included in the communication area 440 of the FWB communication device 433 may be transmitted through the FWB radio frequency band.

As such, the FWB communication device converts the distribution automation control signal received through the optical communication network into a form suitable for FWB communication or a form that can be transmitted to the distribution automation device, and connects transmission automation control signal transmission using FWB communication. Routing function, and a physical configuration for the linkage of the control signal may include a function for amplifying a radio signal. The internal configuration of the FWB communication apparatus for implementing such a function will be described in detail later.

FIG. 5 is a diagram illustrating in more detail the connection relationship between the remote device, the FWB communication device, and the power distribution automation device shown in FIG. 4. As shown in FIG. 5, a distribution automation device 511 such as an automatic recloser or an automatic switchgear is directly connected to a remote device 510 on the optical network ring 400, and the distribution automation control through the optical network. It can receive a signal.

Alternatively, the distribution automation device 523 may be connected to the remote device 520 on the optical network ring 400 via the FWB communication device 521. The FWB communication device 521 may transmit the distribution automation control signal received through the remote device 520 to the distribution automation device 523. Meanwhile, the FWB communication device 521 may transmit a distribution automation control signal through the FWB frequency band to the FWB communication device 531 not connected to the optical communication network. The FWB communication device 531 receiving this may transmit a distribution automation control signal to an automation device 532 such as an automatic recloser or an automatic switch connected to the FWB communication device 531.

The protocol used for FWB communication and the distribution automation control device 410 and the distribution automation control signal between the distribution automation device may be different. According to an embodiment of the present invention, the FWB communication follows the Ethernet protocol, while the distribution automation control signal follows DNP (Distributed Network Protocol), which is a distribution automation protocol used by KEPCO. Therefore, the FWB communication device may include a protocol conversion function between different protocols, and the configuration of the device for this purpose will be described in detail later.

For reference, the distribution automation control signal transmitted by the controller of the distribution automation system according to the present invention to each distribution automation device is a command for instructing a status check of the distribution line switchgear connected to the distribution automation device, or opening or closing the switchgear. May include an instruction to indicate closure. In addition, the distribution automation device that has received the distribution automation control signal may check the failure state of the switchgear of the distribution line, such as a recloser or switch connected to the automation device, and transmit it to the distribution automation controller 410 in the form of a response signal. have. On the other hand, the power distribution automation device may transmit a result of the command for instructing the opening or closing of the switchgear to the power distribution automation controller 410 in the form of a response signal. Therefore, the term "distribution automation control signal" used in the following description is broadly used as a concept including all response signals transmitted from the distribution automation device to the distribution automation controller in addition to the control signal including the command transmitted from the distribution automation controller. Can be interpreted.

In addition, the power distribution automation device may check the failure state of the switchgear according to a predetermined rule without transmitting the distribution automation control command from the distribution automation controller 410 and transmit the result to the distribution automation controller 410. . For example, the distribution automation device may periodically transmit a result of checking a failure state of the switchgear based on a timer.

According to the embodiment of applying the FWB communication based on the backbone optical communication network as shown in Figure 4, it is possible to significantly reduce the number of optical network ring for the distribution automation system, it is possible to reduce the cost of the optical network installation and operation have. In addition, it is possible to improve the stability of the entire power distribution system by incorporating an area where the optical communication network cannot be installed into the power distribution automation system.

As described above, the present invention based on the FWB communication has an advantage that the cost of establishing the communication network is low because there is no additional cost according to the installation of the modem and the wired communication network between the modems. In particular, when using free frequency bands such as the Industrial Science and Medical (ISM) band, the operation cost of the distribution automation system can be greatly reduced.

According to one embodiment, the FWB communication device uses a directional antenna to provide a communication distance of several hundred m to several km between the modem and the modem, so that it is stable between the automation recloser and the automation switch that are hundreds of m to several km apart from each other. A communication channel can be secured.

6 is a diagram illustrating a network configuration of a distribution automation system according to another embodiment of the present invention. Specifically, FIG. 6 shows an entire distribution automation system network composed of only FWB communications without an optical network.

According to the embodiment shown in Figure 6, each of the distribution automation controller 610 and the distribution automation equipment installed on the distribution line 100 is equipped with a FWB communication device is a distribution automation control signal and distribution automation response signal only by FWB communication Can be exchanged. The FWB communication device 610 connected to the distribution automation controller 610 first transmits a distribution automation control signal through the FWB radio frequency band to the FWB communication device 621 located in its communication area. The FWB communication device 621 receives the distribution automation control signal and transmits it back to the other FWB communication devices 631 and 632 belonging to its own communication area 630. Naturally, the FWB communication devices 631 and 632 may also transmit the received distribution automation control signal to other FWB communication devices belonging to their communication area.

As such, by routing the distribution automation control signal using a transmission path composed of overlapping FWB communication regions, it is possible to configure the distribution automation system using only the FWB communication device without a conventional backbone optical communication network.

As described above, when constructing a distribution automation system network, there is no cost of installing and operating an optical network, and even when installing a new distribution automation device, it is possible to overcome the limitation of the installation area by only configuring a suitable cell. Can be increased.

7 is a block diagram showing the internal configuration of the FWB communication apparatus according to an embodiment of the present invention. The FWB communication apparatus 700 of FIG. 7 may be applied to the distribution automation system according to the embodiment of FIG. 4 or 6.

Referring to FIG. 7, the FWB communication apparatus 700 includes an FWB module 710 which transmits a distribution automation control signal to another FWB communication apparatus through an FWB radio frequency band and receives a distribution automation control signal from another FWB communication apparatus. do. The FWB module 710 is an antenna unit 711 for transmitting and receiving high frequency radio signals through the FWB channel, and converts the received high frequency radio signals into baseband signals or converts the baseband signals into high frequency radio signals suitable for FWB transmission. A radio frequency (RF) processor 712 to perform and a basis for generating a data frame using information extracted by encoding and modulating information included in the data frame to be transmitted into a baseband signal or by demodulating and decoding the received baseband signal. The band processor 713 may be included.

In particular, the antenna unit 711 may include one or more directional antennas, one direction antenna in the case of one directional antenna, and two direction antennas in the case of two directional antennas. The FWB communication apparatus 700 including the antenna unit 711 composed of one or more directional antennas may be effectively used according to the pole installation method described below.

The FWB communication device 700 includes an automation controller interface 720 for receiving a distribution automation control signal from a distribution automation controller and transmitting a distribution automation response signal to the distribution automation controller. The automation controller interface 720 may, for example, be connected to a central device 401 or a remote device 402 on the optical network ring 400 according to the embodiment of FIG. 4, and alternatively to automation according to the embodiment of FIG. 6. It may also be directly connected to the controller 610.

The distribution automation control signal received through the automation controller interface 720 is transmitted to the automation device connected to the outside of the FWB communication device 700 through the automation device interface 730. In addition, the distribution automation response signal transmitted from the automation device is received through the automation device interface 730 and transmitted to the distribution automation controller through the automation controller interface 720.

The FWB control unit 740 thus serves to mediate the distribution automation control signal transmitted between the automation controller interface 720 and the automation device interface 730. In addition, the FWB control unit 740 has a routing function for converting protocols of data frames between the automation controller interface 720 or the automation device interface 730 and the FWB module 710 and forwarding distribution automation control signals to other FWB communication devices. Perform.

Looking at the internal configuration in more detail, the FWB control unit 740 may first include a routing table storage unit 741 for storing a routing table for packet forwarding between a plurality of FWB communication devices. As described in connection with the embodiments of FIGS. 4 and 6, the FWB communication apparatus according to the present invention receives a distribution automation control signal from another external FWB communication apparatus (first apparatus), and thus, the FWB communication region of the first apparatus. It can transmit to another FWB communication device (second device) that does not belong. In particular, the distribution automation system according to the embodiment of FIG. 6 transmits the distribution automation control signal through a routing path composed of only FWB communication without a backbone optical communication network, and thus the routing function is required for constructing a scalable system. In the distribution automation system according to the embodiment of FIG. 4, the routing function is essential to increase the cost reduction effect of the introduction of the FWB communication device.

The routing table storage unit 741 stores a routing table including the address of each FWB communication device in order to perform such routing between the FWB communication devices. The routing table can be dynamically updated by the distribution automation system administrator or as the routing environment changes.

In addition to the routing function, the FWB controller 740 may perform a data frame protocol conversion function between the automation controller interface 720 or the automation device interface 730 and the FWB module 710. As illustrated above, when the FWB communication follows the Ethernet protocol and the distribution automation control signal follows the DNP, the protocol conversion unit 742 converts the Ethernet frame received through the FWB module 710 into a DNP frame to control the automation. Alternatively, the DNP frame received through the automation controller interface 720 or the automation device interface 730 may be converted into an Ethernet frame and transmitted to another FWB communication device through the FWB channel.

As such, the FWB control unit 740 may serve to mediate various types of data frames, and thus may include a data frame checker 743 that checks whether or not the data frame is transmitted or received. Although not shown in the drawing, the data frame inspecting unit 743 may include a function for checking whether an error occurs in the data frame received or transmitted through the FWB module 710.

In addition, the data frame checker 743 may apply a security algorithm to the data frame to perform a security check on the data frame. In detail, the data frame inspecting unit 743 may encrypt and decrypt the data frame according to a predetermined security algorithm.

Distribution automation systems play an important role in controlling the opening and closing of distribution lines, and can cause large power outages if problems arise. Therefore, the implementation of a security function is required to block the transmission and reception of abnormal data from an external device in advance.

According to an embodiment, the security function may include two steps, one of which is a process of performing encryption and decryption using an advanced encryption standard (AES) on data frames transmitted and received through an FWB channel, and the other is decryption. It is a process of checking whether the data frame conforms to the DNP protocol and whether the transmitting node is a valid node.

Briefly illustrating a process of performing the security functions of the two steps are as follows. First, the baseband processor 713 restores the original data frame by receiving an encrypted data frame through AES and encoding it. The data frame checker 743 checks the restored data frame to see if the frame conforms to the frame format of the DNP protocol, and checks the Ethernet address and the DNP address of the node that transmitted the data frame to validate the transmitting node. It checks whether it is a node, that is, whether the received data has been transmitted from a valid FWB communication device.

The FWB communication apparatus according to the present embodiment provides a sufficient level of security for constructing a distribution automation system through such frame validation and security inspection.

Lastly, the automation controller port 701 and the automation device port 702 shown in FIG. 7 are used for transmitting and receiving distribution automation control signals through the automation controller interface 720 and the automation device interface 730, respectively. Functions as an external port The automation controller port 701 may be connected to the optical communication network central unit or a remote device in a short distance by wire, and the port 702 for the automation device may be connected to an automation device in a short distance by wire. Short-range wired communication connecting the automation controller port 701 and the automation device port 702 to the outside is, for example, serial communication such as RS-232, RS-485, or a direct cable connection method. Can be configured.

8A to 8D are diagrams showing a method of installing one or more FWB communication apparatuses having such a configuration on a pole, as an example of installation. As shown in FIGS. 8A to 8D, the FWB communication apparatus may be attached to the side of the pole and installed so that the direction of the directional antenna included in the FWB communication apparatus is parallel to the ground. The reason why the direction of the antenna is installed parallel to the ground is that the distribution line is hypothetically parallel to the ground. That is, since the FWB communication apparatus according to the present invention performs data transmission between distribution automation devices located on the distribution line, it is effective to install the antenna so as to have a directing direction parallel to the ground, such as the distribution line.

8A and 8B show an example in which one FWB communication device is installed on the pole. In the installation example of FIG. 8A, the pole direction 800 is directed toward the direction of the antenna of the FWB communication device 811, while in the installation example of FIG. 8B, the direction of the antenna is perpendicular to the direction connecting the antenna and the pole 800. The FWB communication apparatus 821 is provided so that it may become. The installation example of FIG. 8B is a suitable installation example when the transmission path of the radio signal transmitted and received through the bidirectional antenna is not disturbed by the electric pole 800, and uses one bidirectional antenna.

8C illustrates an example of installing an FWB device for securing an FWB communication area by using two FWB communication devices. In the installation example of FIG. 8C, one FWB communication device 831 is installed so that the direction of the antenna is directed in a direction connecting the electric pole 800 and the antenna, and the other FWB communication device 832 is the electric pole 800. On the opposite side, the poles 800 are installed to face the direction of the antenna in the equal direction. That is, one FWB communication device 831 is installed as shown in FIG. 8B, and the other FWB communication device 832 is installed as shown in FIG. 8A. According to this installation example, the antenna directing direction of each FWB communication device is vertical, so that the distribution line proceeds in a straight line, and thus it is applicable to a case where a branch line having a substantially right angle is formed from one pole 800.

8D shows an example of installing an FWB device for securing an FWB communication area by using three FWB communication devices. In the installation example of FIG. 8D, each of the three FWB communication devices 841, 842, and 843 is provided on the side of the electric pole 800 such that the directing direction of the antenna is directed toward the equilibrium direction as shown in FIG. 8A. According to this installation example, it is possible to ensure a 360 ° omnidirectional communication area by arranging the directing directions of the antennas at equal intervals. The distribution line may be in a branching position in almost all directions depending on the pole, and especially in the case of the FWB communication device connected to the distribution automation controller, data must be transmitted / received with the FWB communication devices in all directions to cover all directions. It may be necessary to install an FWB communication device. The installation example of FIG. 8D is an installation example applicable to the case where a 360 ° omnidirectional communication area must be secured.

For reference, the FWB communication devices may use a two-way antenna in terms of economics such as mass production and batch delivery, but it is also possible to use an FWB communication device including a unidirectional antenna if possible for an efficient configuration of the device. For example, in the installation example of FIG. 8C, the FWB communication device 831 can secure a bidirectional communication area by using a bidirectional antenna, and the FWB communication device 832 having a communication area that branches at right angles therefrom is backed up. It is possible to configure to include a unidirectional antenna having a directing direction. In the same manner, the installation example of FIG. 8D can be configured only with FWB communication apparatuses including all unidirectional antennas.

9A and 9B illustrate the plurality of FWB communication devices mutually installed when a plurality of FWB communication devices are installed in association with one power distribution automation device to secure an FWB communication area as shown in the installation examples of FIGS. 8C and 8D. It shows how to connect.

9A illustrates a connection method between two FWB communication devices. As shown in FIG. 9A, when the two FWB communication devices need to be connected, the port 9202 of the automation device of one FWB communication device 910 is used for the automation controller of the other FWB communication device 920. You can exchange data between two devices by connecting to.

The port 1091 for the automation controller of the FWB communication device 910 may be connected to an optical communication network central device or a remote device, and the port 9202 for the automation device of another FWB communication device 920 may be connected to the automation device. By extending this connection method, three or more FWB communication devices can be connected in the same way. For example, as shown in FIG. 9B, the port for the automation device 9302 of the FWB communication device 930 is connected to the port for the automation controller of the other FWB communication device, and the port for the automation device of the other FWB communication device is FWB. It can be used in the antenna installation method of FIG. 8D to secure the 360 ° omnidirectional communication area by connecting three FWB communication devices in a manner that is connected to the port (9401) for the automation control device of the communication device (940).

When connecting FWB communication devices in a daisy-chain manner as described above, a system for controlling a single power distribution automation device using only FWB communication devices without a separate external device controlling a plurality of FWB communication devices can be configured. .

In the automation device control system connected in this manner, for example, the distribution automation device is connected to the port 8202 of the automation device of one FWB communication device 920, and the distribution automation control signal is different from the FWB communication device 910. When received through the FWB module 911, the distribution automation control signal protocol-converted by the FWB control unit 914 is transmitted to the distribution automation device through the FWB communication device 920. At this time, the FWB control unit 924 of the FWB communication device 920 directly forwards to the distribution automation device without repeatedly performing the data frame inspection or the like with respect to the distribution automation control signal that has already undergone the data frame inspection and protocol conversion.

Further, when the distribution automation device is connected to the FWB communication device 920 as described above, when the distribution automation response signal generated in response to the distribution automation control signal from the distribution automation device is transmitted back to the distribution automation controller, the distribution automation response Data frame checking and protocol conversion of signals can be performed only in one FWB communication device without having to be performed in all FWB communication devices. For example, the distribution automation response signal protocol-converted by the FWB control unit 924 of the FWB communication device 920 directly connected to the distribution automation device is duplicated by the FWB control unit 924 of the FWB communication device 910 connected in a daisy-chain fashion. To be forwarded to the FWB module 911 or another FWB communication device connected back to the FWB communication device 910 without the need for protocol conversion. The FWB communication device 910, and another FWB communication device daisy-chained to the FWB communication device 910, receive power distribution automation response signals that have already been converted into Ethernet protocols, and receive the FWB communication device through the FWB module embedded in each device. Can transmit

In the present invention as described above has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from such description.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention. .

According to the present invention, by introducing the fixed wireless bridge communication technology to the distribution automation system, it is possible to reduce or eliminate the optical network installation cost and operating costs, thereby contributing to the efficient operation of the distribution automation system.

In addition, according to the present invention it is possible to automate the switchgear of the distribution line in the area where the optical communication network can not be installed to extend the range of the distribution distribution installation area. Accordingly, it is possible to contribute to the national economy by increasing the distribution automation rate and enabling stable operation of the entire distribution system.

In addition, according to the present invention it is possible to build a nationwide distribution automation system by incorporating the switchgear of the area difficult to install and operate the existing communication network into the distribution automation system.

In addition, according to the present invention there is no limitation of the installation area of the newly installed automation equipment, it is possible to operate more flexibly the distribution automation system.

In addition, according to the present invention, it is possible to secure various methods of installing a fixed wireless bridge communication device including a directional antenna in a pole, thereby supporting various arrangements of a distribution automation device installation area.

In addition, according to the present invention, it is possible to effectively connect a plurality of fixed wireless bridge communication devices and to eliminate a protocol conversion process that may be unnecessary. In addition, it is possible to secure a 360 ° omnidirectional wireless communication area by the connection.

Claims (26)

In the wireless communication device for connecting a distribution automation controller and a plurality of distribution automation devices through a network, An automation controller interface for receiving a distribution automation control signal from the distribution automation controller; An automation device interface for transmitting the received distribution automation control signal to the distribution automation device; A fixed wireless bridge module for transmitting and receiving a distribution automation control signal with a second wireless communication device using a fixed wireless bridge frequency band; And Fixed wireless bridge control unit for performing the transfer and protocol conversion of the distribution automation control signal between the automation controller interface, the automation device interface and the fixed wireless bridge module Wireless communication device comprising a. The method of claim 1, The automation controller interface receives the power distribution automation control signal from the power distribution automation controller through an optical communication network. The method of claim 1, The automation device interface is a wireless communication device, characterized in that for transmitting the distribution automation control signal to the distribution automation device in a short-range wired communication method. The method of claim 3, The short-range wired communication method is a wireless communication device, characterized in that the serial communication method according to the RS-232 or RS-485 standard. The method of claim 1, Wherein said fixed wireless bridge module comprises one or more directional antennas. The method of claim 1, The fixed wireless bridge control unit, Data frame inspection unit for checking the error of the data frame received through any one of the automation controller interface, automation device interface, and the fixed wireless bridge module Wireless communication device comprising a. The method of claim 6, And the data frame inspecting unit inspects the data frame by applying a security algorithm to the data frame. The method of claim 1, The fixed wireless bridge control unit, A protocol conversion unit for performing communication protocol conversion between the communication protocol of the automation controller device interface or the automation device interface and the communication protocol of the fixed wireless bridge module Wireless communication device comprising a. The method of claim 1, The fixed wireless bridge control unit, Routing table storage unit for storing the routing table according to the address system of the automation device interface or the fixed wireless bridge module Including, The fixed wireless bridge controller obtains an address of the second wireless communication device with reference to the routing table, and transmits a distribution automation control signal received through the fixed wireless bridge module to the address through the fixed wireless bridge module. Wireless communication device, characterized in that. The method of claim 1, The plurality of power distribution automation devices are any one of an automation recloser, an automation switch, and an automatic regular open switch. The method of claim 1, The distribution automation control signal may include at least one of a command for confirming a failure state of a distribution line switchgear connected to the distribution automation device and a command for opening and closing the distribution line switch. The method of claim 1, The fixed wireless bridge module is a wireless communication device, characterized in that for transmitting and receiving the distribution automation control signal through a free frequency band. First wireless communication connected to a distribution automation controller via a backbone network to receive a distribution automation control signal from the distribution automation controller, and to transmit the received distribution automation control signal to a second wireless communication device through a fixed wireless bridge communication network. Device; And A second wireless communication device receiving the distribution automation control signal through the fixed wireless bridge communication network and transmitting the received distribution automation control signal to a distribution automation device; Distribution automation system comprising a. The method of claim 13, The backbone network is a distribution automation system, characterized in that the optical communication network having a ring topology. A first wireless communication device receiving a distribution automation control signal through a fixed wireless bridge communication network and transmitting the received distribution automation control signal to a second wireless communication device through the fixed wireless bridge communication network; And A second wireless communication device receiving the distribution automation control signal through the fixed wireless bridge communication network and transmitting the received distribution automation control signal to a distribution automation device; Distribution automation system comprising a. The method of claim 15, And the first wireless communication device amplifies and transmits the received distribution automation control signal to the second wireless communication device. The method according to claim 13 or 15, The distribution automation device is a distribution automation system, characterized in that any one of an automatic recloser, an automatic switchgear, and an automatic regular open switch. The method according to claim 13 or 15, The distribution automation control signal may include at least one of a command for confirming a failure state of a distribution line switchgear connected to the distribution automation device and a command for instructing opening and closing of the distribution line switchgear. The method according to claim 13 or 15, And said fixed wireless bridge communication network uses a free frequency band. A wireless communication system for transmitting and receiving a distribution automation control device between a distribution automation controller and a distribution automation device of a distribution automation system, A first fixed wireless bridge communication device and a second fixed wireless bridge communication device each including a port for an automated controller device and a device for an automated device of a short-range wired communication method, The port for the automation device of the first fixed wireless bridge communication device is connected to the port for the automation controller of the second fixed wireless bridge communication device, The first fixed wireless bridge communication device transmits the distribution automation control signal to the second fixed wireless bridge communication device through the port for the connected automation device. Wireless communication system, characterized in that. The method of claim 20, Each of the first fixed wireless bridge communication device and the second fixed wireless bridge communication device further includes a protocol converter configured to perform communication protocol conversion between the communication protocol of the power distribution automation controller or the power distribution automation device and the fixed wireless bridge communication protocol. and, The protocol conversion unit of the second fixed wireless bridge communication device, when the communication protocol conversion of the distribution automation control signal is performed by the protocol conversion unit of the first fixed wireless bridge communication device, the distribution automation control signal to the distribution automation device Forwarding Wireless communication system, characterized in that. The method of claim 20, The second fixed wireless bridge communication device receives a distribution automation response signal generated in response to the distribution automation control signal from the distribution automation device, And the first fixed wireless bridge communication device receives the distribution automation response signal from the second fixed wireless bridge communication device through the port for the connected automation device. The method of claim 22, Each of the first fixed wireless bridge communication device and the second fixed wireless bridge communication device further includes a protocol converter configured to perform communication protocol conversion between the communication protocol of the power distribution automation controller or the power distribution automation device and the fixed wireless bridge communication protocol. and, The protocol conversion unit of the first fixed wireless bridge communication device, when the communication protocol conversion of the distribution automation response signal is performed by the protocol conversion unit of the second fixed wireless bridge communication device, the distribution automation response signal to the distribution automation control Forwarding to a device Wireless communication system, characterized in that. A method of installing a fixed wireless bridge communication apparatus for power distribution automation including at least one directional antenna on a pole. Installing the fixed wireless bridge communication device such that the fixed wireless bridge communication device is attached to the side of the pole and the directing direction of the directional antenna is parallel to the ground. Communication device installation method characterized in that. The method of claim 24, And a plurality of fixed wireless bridge communication devices, wherein the direction of directivity of each of the plurality of fixed wireless bridge communication devices is perpendicular to each other. The method of claim 24, And a plurality of fixed wireless bridge communication devices, wherein the directing directions of the directional antennas of the plurality of fixed wireless bridge communication devices are equally spaced apart.

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