KR101602370B1 - Automated operating electric power distribution system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automated operation system for a distribution line, and more particularly, to an automated operation system for a distribution line capable of transmitting and receiving an automatic control signal to a distribution line through a wireless communication device having a fixed wireless bridge function.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic operation system for a distribution line,

The present invention relates to an automated operation system for a distribution line, and more particularly, to an automated operation system for a distribution line that can transmit and receive an automatic control signal to a distribution line through a wireless communication device having a fixed wireless bridge function.

Electrical energy, which is widely used in various industrial fields today, is produced and transported through a system called electric power system.

Electric energy is produced in various types of power plants, then delivered to power distribution facilities through high-voltage transmission facilities and substations, and distribution facilities distribute and supply electric energy again to each customer or customer.

The customer also receives electrical energy from the distribution facility through the distribution line and uses it to drive a variety of electrical devices.

1 shows a general construction of a distribution line. As shown in FIG. 1, a distribution line 100 leading from a distribution facility to a customer has a large number of distribution lines, It serves to connect or disconnect each of the lines.

There are several types of switching devices located on the distribution line. The normal open G / A 130 shown in FIG. 1 as being located at the end of the line is normally open.

An automation recloser (R / A) 110, in which a general automation switch (G / A) 120 is located in a road connected to the regular open switch 130 and is connected to at least one switch 130, It is a device that controls the open / close state of the distribution line by repeating the shutdown and closing operation by itself in case of detecting the fault current.

Also, before the introduction of the distribution automation system, if a failure occurs in one of the many open / close devices located in the distribution lines, the user who receives the notification from the user who detected the failure, There is a hassle of adjusting the state.

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

2 illustrates a network configuration of a conventional distribution automation system based on an optical communication network. Referring to FIG. 2, a plurality of distribution line switching devices are connected to one optical communication network 200 having a ring-type topology Is controlled by the distribution automation control device installed at branch office or branch office of KEPCO.

The switching device is connected to a remote control terminal unit (FRTU) or the like to constitute a distribution automation device. The distribution automation control device 210 is connected to the optical communication network 200, Or performs an opening / closing operation according to the distribution automation control signal received from the automation control device 210.

3 shows an internal configuration and a connection method of a distribution automation device connected to an optical communication network. Referring to FIG. 3, an automation device of a distribution automation system according to the related art includes a remote terminal 310, (Not shown).

In addition, the distribution automation device is connected to the remote device 310 by a local wired communication method, for example, a serial communication method.

The automation recloser 320, which is one type of distribution automation equipment, is composed of a recloser main body 322 and a recloser control unit 321 for performing mechanical opening and closing operations.

Similarly, the automation switch 330 includes a switch main body 332 and a remote control terminal unit 331 for generating a fault current when a failure occurs. Each of the recloser control unit 321 and the remote control terminal unit 331 detects the failure of the recloser 320 or the switch 330 by the distribution automation control device 210 through the optical communication network 200, And receives the control signals for controlling the opening and closing operations of the opening and closing devices 322 and 332 from the automated control device 210 and controls the opening and closing devices 322 and 332 accordingly.

2, the distribution automation control device 210 is connected to a central office terminal (COT) on the optical communication network 200. As shown in FIG.

However, as shown in FIG. 2, a conventional distribution automation system based on optical network 200 is required to install a plurality of optical network rings in order to control a large number of open / close devices scattered randomly over a large area In this case, the installation cost and maintenance cost of the optical network may increase.

As is known, the optical network is very expensive to install and maintain, so if the number of switchgear connected to a single optical network ring is small, its operation becomes inefficient.

In addition, it is one of the difficult tasks of conventional distribution automation systems to automate distribution facilities in areas where it is difficult to install optical cables and can not be connected to optical networks.

Therefore, considering the fact that the automation rate of the domestic switching device is about 50%, the above problems of the optical communication network can be a great constraint to increase the automation rate of the switching device.

Therefore, there is a demand for a technology that enables stable operation of the distribution system by reducing the installation and operation cost of the distribution automation system and incorporating the wider distribution line switchgear into the distribution automation system.

Korean Patent Registration No. 10-0770611 (October 22, 2007) entitled " Distribution Automation System and Fixed Wireless Bridge Communication Device for the System "

However, in the case of the registered patent according to the prior art, since the antenna is completely fixed to a specific point on the electric pole, when the reception sensitivity is lowered, there is a problem that data communication is obstructed.

In order to solve this problem, a plurality of antennas must be installed along the circumference of the pole as disclosed in the registered patent. In such a case, the structure becomes complicated, and the antenna installation space becomes insufficient.

Therefore, there is a demand for an improved antenna mounting structure capable of always maintaining the reception sensitivity at the best while using one antenna while rotating according to the reception sensitivity.

Korean Patent Registration No. 10-0770611 (October 22, 2007) "Distribution Automation System and Fixed Wireless Bridge Communication Device for Such System"

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and an object of the present invention is to provide a system and a method for improving the operational stability of the entire distribution system by enlarging the installation area of the automation system of the distribution line, And it is an object of the present invention to provide an automatic operation system of a distribution line which can reduce the operating cost and improve the antenna installation structure and always maintain the reception sensitivity at the best.

The present invention provides a radio communication apparatus for connecting a distribution automation control apparatus and a plurality of distribution automation apparatuses via a network, comprising: an automatic control apparatus for receiving distribution automation control signals from the distribution automation control apparatus; interface; 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 the distribution automation control signal to and from the second wireless communication device using the fixed wireless bridge frequency band; An RF module for transmitting and receiving the distribution automation control signal to and from the second wireless communication device using an RF frequency band; Wherein the controller is configured to perform transmission and protocol conversion of the distribution automation control signal between the automation control device interface, the automation device interface, and the fixed radio bridge module, and to transmit the distribution automation control signal from the fixed radio bridge module to the RF frequency And a fixed wireless bridge control unit for performing a wireless link transfer to the module, the automated operation system comprising:

An antenna (ANT) for enhancing reception sensitivity of wireless communication is further provided. An insertion groove (801) is formed on the top surface of the pole (800) so as to rotate the antenna (ANT) by 360 degrees. The insertion groove 801 is inserted with a cylindrical motor housing 852 having a flange F formed along an upper periphery thereof and an upper opened cylindrical shape; The motor housing 852 is equipped with a rotation motor 854; A wire hole 855 is formed at one side of the outer circumferential surface of the upper end of the electric pole 800 so as to supply electricity to the rotary motor 854; The flange F is vertically pierced at its center, and a portion of the flange F protruding upward is bolted to a rotation support member 856 formed into an empty spherical shape. At the upper end of the rotation support member 856, a rotation block 858 is ball jointed; A controller (CTR) is embedded in a part of the rotation block 858; At the ball jointed inner center, the block axis 859 extends downward and is coupled to the motor shaft 857 via the coupler 860; The rotation motor 854 is equipped with a driver DR for communicating with the controller CTR through short-range wireless communication to adjust the rotation direction and the rotation amount of the rotation motor 854; An antenna ANT is fixed to one side of the rotation block 858; And the controller CTR rotates the rotation motor 854 according to the reception sensitivity of the antenna ANT to maintain the reception sensitivity at the highest level at all times.

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

In addition, it is possible to expand the range of distribution automation installation area by automating the opening and closing device of the distribution line in the area where the optical communication network can not be installed, thereby increasing the distribution automation rate and enabling stable operation of the entire distribution system.

In addition, the antenna maintains the best reception sensitivity at all times while being rotated according to the reception sensitivity, so that stable communication can be maintained.

1 is a diagram showing a general configuration of a distribution line.
2 is a diagram illustrating a configuration of a conventional distribution automation system based on a optical communication network.
3 is a view illustrating an internal configuration and a 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.
FIG. 5 is a view showing in detail an internal configuration and a connection method of a distribution automation device connected to the optical communication network of FIG. 4;
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 illustrating an internal configuration of a fixed wireless bridge communication apparatus according to an embodiment of the present invention.
8A to 8D are views showing a method of installing a fixed wireless bridge communication apparatus according to an embodiment of the present invention on a front body.
8A to 8G are views showing another method of installing a fixed wireless bridge communication apparatus according to an embodiment of the present invention on a front body.
9A and 9B illustrate a connection method of a plurality of fixed wireless bridge communication apparatuses according to an embodiment of the present invention.
10 shows a hardware and software configuration diagram of the FWB radio communication apparatus.
11 shows a circuit diagram of a FWB radio communication apparatus according to the embodiment of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

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

As shown in FIG. 4, the distribution automation system according to the present embodiment includes a distribution automation control device 410 connected to the central apparatus 401 of the optical network ring 400.

The distribution automation control device 410 transmits the distribution automation control signal directly to the distribution automation devices connected to the remote device 402 on the optical communication network through the optical communication network.

On the other hand, the distribution automation devices that are not connected to the optical network ring 400 receive distribution automation control signals through fixed wireless bridge communication.

Here, the term 'fixed wireless bridge (FWB)' refers to a wireless communication method for performing inter-node communication and relaying over a radio frequency band using a fixed wireless communication device, and is an example of FWB , Broadband Wireless Access (BWA), Wireless LAN (WLAN), and the like.

A fixed wireless bridge 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 control device 410 connected to the central device 401 and transmits the distribution automation control signal to another FWB communication To the devices 422 and 423 over the FWB frequency band.

The FWB communication devices 422 and 423 receiving the distribution automation control signal transmit the received control signals to the distribution automation devices connected to the respective FWB communication devices 422 and 423 to perform distribution automation.

The FWB communication device 431 connected to the remote device 402 also receives the distribution automation control signal over the optical network and transmits the received control signal to the distribution automation device directly connected to the FWB communication device 431 To the other FWB communication devices 432 and 433 located in the communication area 430 of the FWB communication device 431 through the FWB frequency band.

In this case, the FWB communication devices 432 and 433 receiving the distribution automation control signal transmit the received control signals to the distribution automation devices connected to the respective FWB communication devices 432 and 433.

In addition, a distribution automation device that is not connected to the optical network may also be connected to another distribution automation device that is not connected to the optical network through FWB communication.

4, the FWB communication device 433 transmits the distribution automation control signal received from the FWB communication device 431 connected to the remote device 402 to the distribution automation device connected to the FWB communication device 431, To the FWB communication device 441 included in the communication area 440 of the FWB communication device 433 without being included in the communication area 430 of the FWB communication device 433. [

As described above, the FWB communication device includes a protocol conversion function that converts a distribution automation control signal received through an optical communication network into a form suitable for FWB communication or a form that can be transmitted by a distribution automation device, A routing function, and a function of amplifying a radio signal as a physical configuration for coupling the control signal.

The internal configuration of the FWB communication device for implementing such a function will be described in detail later.

FIG. 5 is a view showing the connection relationship between the remote device, the FWB communication device, and the distribution automation device shown in FIG. 4 in more detail.

5, a distribution automation device 511, such as an automation recloser or an automation switch, is connected directly to the remote device 510 on the optical network ring 400, Signal can be received.

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 via the remote device 520 to the distribution automation device 523.

Meanwhile, the FWB communication device 521 can transmit the 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 that has received the data can transmit the distribution automation control signal to the automation equipment 532 such as an automation recloser or an automation switch.

The protocol used for transmission of the distribution automation control signal between the protocol used for FWB communication and the distribution automation control device 410 and the distribution automation device may be different.

According to one embodiment of the present invention, the FWB communication follows the Ethernet protocol, while the distribution automation control signal follows the Distributed Network Protocol (DNP), a distribution automation protocol used by KEPCO.

Accordingly, 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 later in detail.

For reference, the distribution automation control signal transmitted from the control apparatus of the distribution automation system according to the present invention to each distribution automation apparatus includes a command for instructing status confirmation of the distribution line open / close apparatus connected to the distribution automation apparatus, And may include an instruction to indicate closure.

In addition, the distribution automation apparatus receiving the distribution automation control signal can check the failure state of the opening / closing apparatus by a distribution line such as a recloser or a switch connected to the automatic apparatus, and transmit it to the distribution automation control apparatus 410 in the form of a response signal have.

On the other hand, the distribution automation device may transmit the execution result of the command for instructing the opening / closing of the opening / closing device to the distribution automation control device 410 in the form of a response signal.

Therefore, the term "distribution automation control signal " used in the following description includes not only a control signal including a command transmitted from the distribution automation control apparatus but also a response signal transmitted from the distribution automation apparatus to the distribution automation control apparatus Can be interpreted widely.

Alternatively, the distribution automation device may check the failure state of the switching device according to a predetermined rule without receiving the distribution automation control command from the distribution automation control device 410, and transmit the result to the distribution automation control device 410 .

For example, the distribution automation apparatus can periodically transmit the result of checking the failure state of the opening / closing apparatus based on the timer.

As shown in FIG. 4, according to the embodiment in which the FWB communication is applied based on the backbone optical communication network, the number of optical network rings for the distribution automation system can be significantly reduced, and the cost for installing and operating the optical network can be reduced have.

In addition, it is possible to incorporate an area where the optical communication network can not be installed into the distribution automation system, thereby improving the stability of the entire distribution system.

As described above, the present invention based on FWB communication has an advantage in that it does not incur the additional cost due to the installation of the wired communication network between the modem and the modem, and thus the construction cost of the communication network is low.

Particularly, in the case of using a free frequency band 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 meters to several kilometers between the modem and the modem, thereby providing a stable and reliable communication between automation reclosers and automation switches spaced from several hundred meters to several kilometers apart. It is possible to secure a communication channel.

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

More specifically, Figure 6 shows a complete distribution automation system network consisting only of FWB communications without optical network.

According to the embodiment shown in Fig. 6, the FWB communication device is installed in the distribution automation control device 610 and each distribution automation device installed on the distribution line 100 so that only the distribution automation control signal and the distribution automation response signal Can be exchanged.

The FWB communication device 610 connected to the distribution automation control device 610 first transmits the distribution automation control signal via the FWB radio frequency band to the FWB communication device 621 located within its communication area. The FWB communication device 621 receives the distribution automation control signal and transmits it again to the other FWB communication devices 631 and 632 belonging to its communication area 630.

It is natural that the FWB communication devices 631 and 632 can also transmit the received distribution automation control signal to other FWB communication devices belonging to its communication area.

In this manner, it is possible to configure the distribution automation system using only the FWB communication device without the conventional backbone optical communication network by routing the distribution automation control signal using the transmission path composed of the FWB communication areas mutually overlapping.

When the distribution automation system network is constructed as described above, the installation and operation cost of the optical network is not taken at all, and even when a new distribution automation device is installed, it is possible to overcome the limitation of the installation area only by proper cell configuration, Can be increased.

7 is a block diagram illustrating an internal configuration of a FWB communication apparatus according to an embodiment of the present invention.

The FWB communication device 700 of FIG. 7 can be applied to a distribution automation system according to the embodiment of FIG. 4 or 6. FIG.

7, the FWB communication device 700 includes an FWB module 710 that transmits distribution automation control signals to other FWB communication devices over the FWB radio frequency band and receives distribution automation control signals from other FWB communication devices do.

The FWB module 710 includes an antenna unit 711 for transmitting and receiving a high frequency wireless signal through an FWB channel, a function for converting a received high frequency wireless signal into a baseband signal or a baseband signal into a high frequency wireless signal suitable for FWB transmission An RF (Radio Frequency) processing unit 712 for performing a baseband signal processing on the baseband signal, a baseband unit 712 for encoding and modulating information included in a data frame to be transmitted into a baseband signal or demodulating and decoding a received baseband signal, And a band processing unit 713.

In particular, the antenna unit 711 may include one or more directional antennas. If the antenna unit 711 includes one directional antenna, the antenna unit 711 has a directional direction of one direction. If the directional antenna includes two directional antennas, the antenna unit 711 has a directional direction.

All of the FWB communication apparatuses 700 including the antenna unit 711 composed of one or more directional antennas can be effectively used according to a pole mounting method to be described later.

The FWB communication device 700 includes an automated control device interface 720 that receives the distribution automation control signal from the distribution automation control device and transmits the distribution automation response signal to the distribution automation control device. The automated control device interface 720 may be coupled to the central device 401 or the remote device 402 on the optical network ring 400 according to the embodiment of Figure 4 for example, And may be directly connected to the control device 610. [

The distribution automation control signal received via the automation control device interface 720 is transmitted to the automation device connected to the outside of the FWB communication device 700 through the automation device interface 730. [

Also, the distribution automation response signal transmitted from the automation device is received through the automation device interface 730 and transmitted to the distribution automation control device through the automated control device interface 720. [

The FWB control unit 740 mediates the distribution automation control signal transmitted between the automation control device interface 720 and the automation device interface 730.

The FWB control unit 740 also controls the protocol conversion of the data frame between the automation control device interface 720 or the automation device interface 730 and the FWB module 710 and the routing function for forwarding the distribution automation control signal to other FWB communication devices .

In more detail, the FWB control unit 740 may include a routing table storage unit 741 for storing a routing table for packet forwarding among a plurality of FWB communication devices.

4 and 6, the FWB communication apparatus according to the present invention receives the distribution automation control signal from another external FWB communication apparatus (first apparatus) and transmits the distribution automation control signal to the FWB communication region To another FWB communication device (second device) not belonging to the FWB communication device.

In particular, the distribution automation system according to the embodiment of FIG. 6 transmits the distribution automation control signal through the routing path composed only of the FWB communication without the backbone optical communication network, and therefore, the routing function is necessarily required for building a scalable system.

In the distribution automation system according to the embodiment of FIG. 4, the routing function is essential in order to increase the cost saving effect of introduction of the FWB communication device.

The routing table storage unit 741 stores a routing table including the address of each FWB communication device to perform routing between the FWB communication devices.

The routing table may be updated dynamically by the distribution automation system administrator or as the routing environment changes.

The FWB control unit 740 may perform a data frame protocol conversion function between the automation control device interface 720 or the automation device interface 730 and the FWB module 710 in addition to the routing function.

When the FWB communication conforms to the Ethernet protocol and the distribution automation control signal conforms to the DNP as described above, the protocol conversion unit 742 converts the Ethernet frame received through the FWB module 710 into a DNP frame, Or to an automation device, or convert the DNP frame received via the automated control device interface 720 or the automation device interface 730 to an Ethernet frame and transmit it to another FWB communication device via the FWB channel.

The FWB control unit 740 may include a data frame checking unit 743 that mediates various types of data frames and checks whether data frames transmitted and received are erroneous.

Also, although not shown in the figure, the data frame checking unit 743 may include a function of checking whether a data frame received or transmitted through the FWB module 710 is erroneous.

In addition, the data frame checking unit 743 may check the security of the data frame by applying a security algorithm to the data frame.

More specifically, the data frame checking unit 743 can perform encryption and decryption of a data frame according to a predetermined security algorithm.

The distribution automation system plays an important role in controlling the opening and closing of the distribution line, and if a problem occurs, it can lead to a large scale power outage.

Therefore, it is required to implement a security function in order to prevent abnormal data transmission / reception from an external device in advance.

According to one embodiment, the security function may include two steps: one is a process of encrypting and decrypting a data frame transmitted and received through the FWB channel using AES (Advanced Encryption Standard), and the other is a process of performing encryption and decryption using AES It is a process of checking whether the decoded data frame conforms to the DNP protocol and whether the transmitted node is a valid node.

Hereinafter, a process of performing the two-step security function will be briefly described.

First, the baseband processor 713 receives the encrypted data frame through the AES and encodes it, thereby restoring the original data frame.

Then, the data frame checking unit 743 checks whether the frame conforms to the frame format of the DNP protocol for the restored data frame, and checks the Ethernet address and the DNP address of the node that transmitted the data frame, valid node, i. e. whether the received data is from a valid FWB communication device.

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

7, the port 701 for the automation controller and the port 702 for the automation device are connected to the interface 720 for the automation controller and the interface 730 for the automation device, respectively, And functions as an external port.

The port 701 for the automation controller can be connected to the optical network center device or the remote device by wire from a short distance and the port 702 for the automation device can be connected to the automation device by wire from a short distance.

The local wired communication for connecting the port 701 for an automation controller and the port 702 for an automation device to the outside may be a serial communication such as RS-232 or RS-485 or a direct cable connection Lt; / RTI >

8A to 8D are views showing a method of installing one or more FWB communication devices having the above configuration on the front housing as an example of installation.

As shown in Figs. 8A to 8D, the FWB communication device may be installed so as to be attached to the side of the pole and the directional direction of the directional antenna included in the FWB communication device is parallel to the ground.

The reason why the antenna is oriented parallel to the ground is that the distribution line is laid parallel to the ground.

In other words, since the FWB communication apparatus according to the present invention carries out data transmission between the distribution automation apparatuses located on the distribution line, it is effective to provide the antenna so as to have a directivity direction parallel to the ground like a distribution line.

Figs. 8A and 8B show an example in which one FWB communication device is installed on the front housing. 8A, the electric pole 800 is oriented in the direction of the antenna of the FWB communication device 811 while the direction of the antenna in the installation example of FIG. 8B is perpendicular to the direction connecting the antenna 800 and the electric pole 800 The FWB communication device 821 is installed.

The installation example of FIG. 8B is an example of an installation suitable for use of a bidirectional antenna because the transmission path of a radio signal transmitted / received via the bidirectional antenna may not be disturbed by the pole 800.

FIG. 8C shows an example of installing an FWB device for securing an FWB communication area using two FWB communication devices.

8C, one FWB communication device 831 is installed so that the direction of the antenna is oriented in the direction connecting the electric pole 800 and the antenna, and the other FWB communication device 832 is installed in the direction of the antenna 800, And the electric pole 800 is disposed on the opposite side so that the direction of the antenna is directed in the backward 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 such an installation example, the antenna directing directions of the respective FWB communication apparatuses are vertical, and it is applicable to a case where a distribution line travels in a straight line and a branching line having a substantially right angle is generated from one pole 800.

FIG. 8D shows an example of FWB device installation for securing the FWB communication area using three FWB communication devices.

In the 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 so that the direction of the antenna is oriented in the counterclockwise direction of the electric pole 800 as shown in Fig. 8A.

According to the present example of installation, it is possible to secure a 360-degree omnidirectional communication area by disposing the antennas so that all of the directional directions are equally spaced.

The FWB communication device connected to the distribution automation control device is required to transmit and receive data to / from the FWB communication devices in all directions, It may be necessary to install a FWB communication device.

The installation example of Fig. 8D is an example of installation that can be applied when the 360 omni-directional communication area needs to be secured.

For reference, the bidirectional antennas can be used for the FWB communication devices in terms of economics such as mass production and batch delivery, but it is also possible to use a FWB communication device including a unidirectional antenna for efficient configuration of the device, if possible.

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 branched from the bidirectional communication area from the FWB communication device 832 has a square It is possible to configure the antenna to include a unidirectional antenna having a directivity direction.

Similarly, the installation examples of FIG. 8D can be configured only as FWB communication devices 841, 842, and 843 including unidirectional antennas.

Since the FWB communication apparatuses 811, 821, 831, 832, 841, 842, and 843 are fixed to specific positions as the fixed type, the number of the FWB communication apparatuses 811, 821,

8E to 8G, the FWB communication device 851 is also rotated together with the antenna ANT by configuring the antenna to be freely rotatable 360 degrees around the electric pole 800 as a rotation center in accordance with the communication sensitivity, Therefore, it is not necessary to fix to a specific point, and communication is performed by finding a point having the best reception sensitivity, thereby improving data transmission / reception efficiency.

At this time, since the FWB communication device 851 is a wireless communication device, there is no possibility that the line is interfered with.

More specifically, this modified example includes an insertion groove 801 serving as a rotation center so as to rotate the antenna ANT 360 °.

The insertion groove 801 is recessed and formed on the upper surface of the electric pole 800 with a certain radius.

Particularly, a plurality of fixing grooves 802 are further formed on the bottom surface of the insertion groove 801 at intervals in the circumferential direction. The fixing grooves 802 are for guiding a kind of anchor fixing structure.

A cylindrical motor housing 852 having an upper portion opened and a flange F formed around the upper end of the insertion groove 801 is inserted.

In order to increase the fixing stability of the motor housing 852, a plurality of fixed anchors 853 corresponding to the fixing grooves 802 are formed on the lower end surface of the motor housing 852 in the circumferential direction, do.

A wire hole 855 is formed on one side of the outer circumferential surface of the upper end of the electric pole 800 to supply electricity to the rotary motor 854, And the power is supplied to the rotation motor 854. [

In addition, the rotation support member 856 is fixed to the flange F by a bolt. The center of the rotation support member 856 is perforated in the vertical direction. And is formed into an empty spherical shape.

Therefore, the motor shaft 857 of the rotation motor 854 can penetrate through the lower end of the rotation support member 856 and enter the hollow interior.

The driver DR is built in the rotation motor 854 and communicates with the controller CTR through a short distance wireless communication and is controlled by the controller CTR in response to a control signal of the controller CTR. The rotation direction and the rotation amount of the rotation shaft 854 are adjusted.

A rotation block 858 is ball jointed at the upper end of the rotation support member 856 and a controller CTR is incorporated in a part of the rotation block 858. A block shaft 859 is inserted into the ball jointed center, And is coupled to the motor shaft 857 through a coupler 860. [

At this time, the coupler 860 connects and fixes the motor shaft 857 and the block shaft 859 in the form of flange fixing.

In addition, an antenna ANT is fixed to one side of the rotation block 858. The FWB communication device 851 is fixed on a rotation block 858 opposed to the antenna ANT.

The FWB communication device 851 is electrically connected to the controller CTR to be able to check the reception sensitivity of the antenna ANT in real time and the power of the controller CTR is transmitted to the FWB communication device Device < RTI ID = 0.0 > 851. < / RTI >

In addition, a plurality of square grooves (HOM) are formed on the lower surface of the antenna ANT. The bottom surface of the square groove (HOM) is inclined in an oblique direction to increase reception sensitivity.

According to this configuration, when the reception sensitivity of the antenna ANT becomes equal to or less than the set value, the controller CTR slowly rotates the rotation motor 854.

As the motor shaft 857 rotates, the coupled block shaft 859 rotates, and the rotating block 858 rotates, so that the antenna ANT rotates in a certain direction in a certain direction.

In the process, the reception sensitivity is checked in real time. When the reception sensitivity exceeds the set value, the driving of the rotation motor 857 is stopped under the control of the controller (CTR), and data is continuously received in this state .

This process is continuously performed according to the reception sensitivity, and the rotation motor 854 is always controlled to rotate in only one predetermined direction. That is, if it is designed to rotate in the clockwise direction, it is rotated only in the clockwise direction, and vice versa, in this case also, it is rotated in the opposite direction. This is because if control is reversed, control is very difficult and difficult.

9A and 9B illustrate a case where a plurality of FWB communication devices are installed in association with one distribution automation device in order to secure a FWB communication area as in the installation examples of FIGS. 8C and 8D, And a method of connecting them to each other. Of course, it is more preferable to have the antenna (ANT) structure of Figs. 8E to 8G.

9A shows a connection method between two FWB communication devices.

9A, when the two FWB communication devices are to be connected, the port 9102 for the automation device of one FWB communication device 910 is connected to the port 9201 for the automation controller of the other FWB communication device 920, The data can be exchanged between the two devices.

The port 9101 for the automation controller of the FWB communication device 910 can be connected to the optical network center device or the remote device and the port 9202 for the automation device of the other FWB communication device 920 can be connected to the automation device.

By extending this connection method, three or more FWB communication devices can be connected in the same manner.

For example, as shown in FIG. 9B, an automation device port 9302 of the FWB communication device 930 is connected to a port for an automation controller of another FWB communication device, and a port for an automation device of the other FWB communication device is connected to a FWB 8D for connecting the three FWB communication devices by connecting to the port 9401 for the automation controller of the communication device 940 to secure a 360 ° omnidirectional communication area.

When a FWB communication device is connected in a daisy-chain manner, a system for controlling one distribution automation device can be constructed by using only FWB communication devices without a separate external device for controlling a plurality of FWB communication devices .

In this case, for example, the distribution automation device is connected to the automation device port 9202 of one FWB communication device 920, and the distribution automation control signal is transmitted to the other FWB communication device 910, The FWB control unit 914 transfers the protocol-converted distribution automation control signal to the distribution automation apparatus through the FWB communication apparatus 920. [

At this time, the FWB control unit 924 of the FWB communication apparatus 920 immediately forwards the distribution automation control signal, which has already been subjected to data frame inspection and protocol conversion, to the distribution automation apparatus without performing data frame inspection and the like repeatedly.

When the distribution automation response signal generated in response to the distribution automation control signal from the distribution automation device is transmitted to the distribution automation control device again in a state where the distribution automation device is connected to the FWB communication device 920 as described above, The data frame inspection and protocol conversion of the signal can be performed only in one FWB communication device without being performed redundantly in all the 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 equipment is sent to the FWB control unit 924 of the FWB communication device 910 connected in a daisy- Can be forwarded to another FWB communication device connected to the FWB communication device 910 again in the FWB module 911 or the de-chain type without having to be duplicated and protocol converted.

Another FWB communication device connected in a daisy-chain fashion to the FWB communication device 910 and the FWB communication device 910 receives the distribution automation response signal already converted to the Ethernet protocol and transmits it via the FWB module built in each device Lt; / RTI >

Hereinafter, as another embodiment according to the present invention, a description will be made of an embodiment in which the radio section is duplicated in the FWB communication apparatus.

The FWB wireless communication device uses the ISM band, 5.8GHz FHSS, as a point-to-point wireless bridge through a directional antenna. If a radio disturbance occurs in the wireless section, it is necessary to prevent the communication from being interrupted .

The FWB wireless communication apparatus may be configured with hardware and software as shown in FIG.

The FWB wireless communication apparatus according to the present invention may further include a duplication processing software module 1010, a wireless driver 1020, and an RF module 1030 for duplication processing.

As the wireless communication module, the RF module (for example, 400 MHz RF) is further duplicated in addition to the above-described fixed wireless bridge module (for example, 5.8 G WLAN band).

Like the fixed wireless bridge module, the RF module 1030 transmits and receives distribution automation control signals to and from other wireless communication devices using the RF frequency band.

The redundancy processing software module 1010 performs RF switching on the MAC link without interrupting the application data interval when a failure of the wireless link occurs on the MAC of the wireless driver 1020 in a S / W fashion, so that the RL (Radio Link) The data section can be maintained in a sustainable manner, so that data can be transmitted without loss.

If the transmission function is not smoothly transmitted due to a temporary obstacle in the directional antenna (radio section) of 5.8 GHz, for example, interference due to a direct object, the transmission function transmits radio waves at 400 MHz, which is better than 5.8 GHz, This ensures data continuity.

The software configuration of FIG. 10 constitutes a dual of a 5.8G module drive and a 400M module drive 102 in the kernel area where control of the hardware stage can be performed.

If a connection error occurs by performing a wireless handshake in the drive area, the redundancy processing software module 1010 of the upper application S / W performs a wireless section transfer, so that the physical layer transfer is performed more than the handshake of the application data It is preferable to configure the S / W so that the switching can be performed within a short time.

As an example according to the present invention, the redundancy processing software module 1010 may be included in the fixed wireless bridge controller 740.

The fixed wireless bridge control unit 740 may perform the radio link switching from the fixed wireless bridge module to the RF frequency module when a fault occurs in the existing fixed wireless briar frequency band.

As another example according to the present invention, in order to detect the occurrence of a failure in the radio section, when a timer is activated after a transmission of packet data and an acknowledgment signal is not received after a predetermined time, As shown in FIG.

If a timeout is detected, the duplication procedure is performed by the duplication processing software module 1010 immediately.

11 shows a circuit diagram of a FWB radio communication apparatus according to the embodiment of FIG.

The RF wireless module 1110 at 400 MHz in the physical layer can be connected to the CPU by the RS232C 1120 and the 5.8 GHz WLAN module 1130 can be connected to the CPU by using the Mini PCI interface 1140.

When data transmission is performed at 5.8 GHz, which is the main channel, when an abnormality occurs in the radio link, the physical layer switching can be performed through port switching.

100: Distribution line 200: Optical communication network
310: Remote device 320: Automation recloser
330: Automation switch

Claims (1)

1. A wireless communication device for connecting a distribution automation control device and a plurality of distribution automation devices via a network, the automation control device interface receiving an distribution automation control signal from the distribution automation control device; 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 the distribution automation control signal to and from the second wireless communication device using the fixed wireless bridge frequency band; An RF module for transmitting and receiving the distribution automation control signal to and from the second wireless communication device using an RF frequency band; Wherein the RF module transmits the distribution automation control signal and performs protocol conversion between the automatic control device interface, the automation equipment interface, and the fixed radio bridge module, and when the failure occurs in the fixed radio bridge frequency band, And a fixed wireless bridge control unit for performing a radio link switching to the distribution line;
An antenna (ANT) for enhancing reception sensitivity of wireless communication is further provided. An insertion groove (801) is formed on the top surface of the pole (800) so as to rotate the antenna (ANT) by 360 degrees. The insertion groove 801 is inserted with a cylindrical motor housing 852 having a flange F formed along an upper periphery thereof and an upper opened cylindrical shape; The motor housing 852 is equipped with a rotation motor 854; A wire hole 855 is formed at one side of the outer circumferential surface of the upper end of the electric pole 800 so as to supply electricity to the rotary motor 854; The flange F is vertically pierced at its center, and a portion of the flange F protruding upward is bolted to a rotation support member 856 formed into an empty spherical shape. At the upper end of the rotation support member 856, a rotation block 858 is ball jointed; A controller (CTR) is embedded in a part of the rotation block 858; At the ball jointed inner center, the block axis 859 extends downward and is coupled to the motor shaft 857 via the coupler 860; The rotation motor 854 is equipped with a driver DR for communicating with the controller CTR through short-range wireless communication to adjust the rotation direction and the rotation amount of the rotation motor 854; An antenna ANT is fixed to one side of the rotation block 858; The controller CTR rotates the rotation motor 854 according to the reception sensitivity of the antenna ANT to maintain the reception sensitivity at all times,
A plurality of fixing grooves 802 are further formed on the bottom surface of the insertion groove 801 at intervals in the circumferential direction,
Wherein a plurality of fixed anchors (853) inserted in the fixing grooves (802) with a spacing in the circumferential direction are protruded downward from the lower end surface of the motor housing (852).

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