JP6410354B2 - Distribution line automation system - Google Patents

Description

  The present invention relates to a technology capable of collecting system information by a master station device in a short time and efficiently in a distribution line automation system including an old slave station device that does not support IP communication as a constituent element.

  2. Description of the Related Art Conventionally, a distribution line automation system that realizes improvement in supply reliability of a high-voltage distribution system, efficiency in operation management, and labor saving is known (see Non-Patent Document 1).

Aichi Electric Technical Report No. 26 (2005) pages 4-9

  As shown in FIG. 5 (page 5) of Non-Patent Document 1, the distribution line automation system connects the master station device installed in the sales office and the slave station device installed in the distribution line via a dedicated communication line. By collecting the state data of the distribution line obtained by the slave station device by the master station device, the system information of the distribution line is monitored and the distribution facility is remotely controlled.

  The communication (TCM) device that constitutes the master station device is in charge of constant monitoring to reduce the processing amount of the master computer of the master station device, and performs polling monitoring (sequentially calling multiple slave station devices and status data of distribution lines) If the status has changed, information is sent to the main computer of the master station.

  A metal cable is widely used as a dedicated communication line, and communication with the master station device is possible by connecting the cable to a modem built in the slave station device. Distribution line status data obtained by the slave station device is sent by a modem to a communication (TCM) device through a dedicated line. The communication (TCM) device sends the received signal to the main computer of the master station device.

  However, in recent distribution line automation systems, the collected information has expanded to three-phase voltage and current, power factor and voltage imbalance rate based on these, etc. Therefore, further high-speed communication is required.

  Therefore, in the distribution line automation system, instead of the conventional communication using the metal line, the optical line using the optical fiber has been utilized, and the master station device and the slave station device constituting the system also need specifications corresponding to this. Become.

  However, the number of installed slave station devices is enormous, and it is impossible to replace them with a slave station device (hereinafter referred to as a new slave station device) corresponding to an optical IP communication line at a time. The product life of the slave station apparatus is about 20 years, and it is not economical to replace the slave station apparatus that has just been installed with a new slave station apparatus.

  Therefore, the old slave station devices are sequentially replaced with the new slave station devices in accordance with the replacement schedule considering the product life. In this case, as shown in FIG. 2, the old slave station device 1 and the new slave station are replaced. The device 2 is mixed in the distribution line system.

  As a result, the master station device 3 includes the port 4 that communicates with the old slave station device 1 and the IP communication (TCM) function unit 5 that communicates with the new slave station device 2. It is necessary to enable communication with both slave station devices 2.

  In the master station device 3 configured in this manner, the optical communication unit 7 that converts an electrical signal into an optical signal is connected to the IP communication (TCM) function unit 5 by an Ethernet LAN 6 (Ethernet is a registered trademark) made of a metal line. Then, it is connected to the optical fiber 8 constituting the optical line via the optical communication unit 7.

  The optical fiber 8 is branched by demultiplexers 9a, 9b,..., And an optical communication unit 12 including an optical communication unit 10 and a DC power supply unit 11 is connected to each of the optical fibers 8, and the optical communication unit 12 is connected to an Ethernet LAN 13 including a metal line. It is connected to a new slave station device 2 having a built-in IP communication function unit (not shown). Reference numeral 14 denotes a power supply line for supplying power from the new slave station device 2 to the DC power supply unit 11 constituting the optical communication unit 12.

  In such a system configuration, the master station device 3 monitors a plurality of new slave station devices 2 connected via the optical fiber 8 almost simultaneously by IP optical communication capable of high-speed transmission, and the state of the distribution line in the same time zone Data can be collected.

  On the other hand, the old slave station device 1 is connected to a communication (TCM) device 16 connected by an Ethernet LAN 15 and a signal line 17 for performing communication of, for example, a frequency shift keying signal, and an electric signal is transmitted as an optical signal. It is connected to an optical fiber 19 that constitutes an optical line through an optical communication device 18 that converts the signal to the optical fiber.

  The optical fiber 19 is branched by a branching filter 20, and each comprises an O / E conversion unit 21 that converts an optical signal into an electric signal, a data conversion unit 22 that performs frequency shift modulation of the signal, and a DC power supply unit 23. An optical communication device 24 is connected, and the optical communication device 24 is connected to the old slave station device 1 via a signal line 25. A power line 26 supplies power from the old slave station device 1 to the DC power source 23 of the optical communication device 24.

  When the master station device 3 shown in FIG. 2 collects the state of the distribution line obtained by the old slave station device 1, all the old slave station devices 1 connected to the communication (TCM) device 16 are monitored in order. To go.

  That is, the communication (TCM) device 16 transmits the monitoring instruction of the old slave station device 1 to the optical communication device 18, which converts this into an optical signal and transmits it through the optical fiber 19.

  The optical communication device 24 that has received this optical signal converts the optical signal into an electrical signal, and then, for example, performs frequency shift keying and transmits a monitoring command to the old slave station device 1 via the signal line 25.

  The old slave station device 1 transmits the state data of the distribution line at that time according to the monitoring command to the optical communication device 24 via the signal line 25. The optical communication device 24 converts the received signal into an optical signal and transmits it to the optical communication device 18.

  The optical communication device 18 converts the received optical signal into an electrical signal, and then, for example, performs frequency shift keying and sends it to the communication (TCM) device 16. The communication (TCM) device 16 sends the received distribution line state data to the master station device 3 main computer 3a.

  Thereafter, the communication (TCM) device 16 sequentially performs the above-described monitoring operation on the connected old child station device 1, and when monitoring of all the old child station devices 1 is completed, the old child first monitored By returning to the station apparatus 1 and repeating the same monitoring operation, the system information in the main computer 3a is always grasped.

  As described above, the master station device 3 main computer 3a can communicate with the old slave station device 1 that does not support IP communication via the communication (TCM) device 16 and the optical communication devices 18 and 24. In this method, polling monitoring of the communication (TCM) device 16 is performed by sequentially calling the connected old slave station devices 1, and the main slave station device 1 has a low communication speed. It takes a considerable amount of time to collect the state data by the computer 3a.

  In other words, it takes about one minute at the earliest to collect measurement data from all of the old slave station devices 1 installed on the distribution line, and if the state data collection time becomes long, A time difference will occur, and system information at a specific time cannot be accurately grasped.

  In order to solve the above problem, the present invention reduces the monitoring time of the distribution line system even in the case where the old slave station apparatus and the new slave station apparatus coexist in the distribution line system, and in the same time zone The present invention provides a distribution line automation system capable of accurately grasping the system state of a distribution line.

According to the first aspect of the present invention, the slave station device installed in the distribution line system and the master station device installed in the sales office of the electric power company are connected by a communication line, and the slave station device is connected by remote monitoring from the master station device. In the distribution line automation system that realizes the system status and remote control of distribution facilities, install an IP converter for each slave station device that does not support IP communication, and perform analog communication with the slave station device continuously. Acquires and stores distribution line status data in the IP converter, and selects the latest status data of the distribution channel previously stored in accordance with the monitoring command from the master station device via IP communication. It was configured to reply by communication.

  The invention according to claim 2 is the distribution line automation system according to claim 1, wherein the IP converter installed for each slave station device has a time synchronization function and is continuously acquired from the slave station device. The time information was added to the data and saved.

  According to a third aspect of the present invention, in the distribution line automation system according to the second aspect, the IP converter installed for each slave station device is provided with a time synchronization function realized by GPS or network distribution.

  According to the first aspect of the present invention, since the slave station device that does not support IP communication can also perform IP communication with the master station device via the IP converter, between the master station device and the slave station device that does not support IP communication. The communication speed of the master station device can be improved, and the collection time of the state data of the distribution line by the master station device can be shortened.

  Also, since the latest status data is returned to the master station device among the status data stored with the time information added in the IP converter, the status data at the request time when the master station device issued the monitoring command is surely obtained. It is possible to transmit to the master station device.

  According to the second aspect of the present invention, the time information is added to the status data acquired from the slave station device that does not support IP communication and stored, so that the stored status data is the system information of when. Can be identified.

  According to the invention of claim 3, the IP converter can realize time synchronization easily and accurately by GPS or network distribution.

It is a schematic diagram which shows the structure of the distribution line automation system of this invention. It is a schematic diagram which shows the structure of the conventional distribution line automation system.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram showing the configuration of the distribution line automation system of the present invention. In FIG. 1, the same elements as those of the conventional distribution line automation system shown in FIG.

  In FIG. 1, a master station device 3 includes an IP communication (TCM) function unit 5 and is connected to an optical fiber 8 constituting an optical line via an optical communication unit 7 connected thereto by an Ethernet LAN 6. It is connected to the new slave station device 2 via the optical communication unit 12 connected to each of the optical fibers 8 branched by the branching filter 9 (9a, 9b,...), The Ethernet LAN 13 and the power line 14. Is the same as the conventional distribution line automation system shown in FIG.

  On the other hand, the connection configuration of the old slave station device 1 and the master station device 3 is an essential part of the present invention. The master station device 3 is connected to the optical fiber 8 via the optical communication unit 7 connected to the IP communication (TCM) function unit 5 via the Ethernet LAN 6.

  The optical fiber 8 is branched by a branching filter 9 (9a, 9b,...), And an IP converter 27 is connected to each branch. The IP converter 27 includes an optical communication unit 28 that converts an optical signal into an electrical signal, and an IP conversion unit 29 that performs frequency shift modulation of the converted electrical signal, for example. In addition, the time synchronization function unit 30 is provided, and time information can be added to the distribution line state data acquired from the old slave station device 1 and stored.

  Reference numeral 31 denotes a DC power supply unit that receives power supply from the old slave station device 1 via the power supply line 26, and the IP converter 27 and the old slave station device 1 communicate through the signal line 25.

  In the distribution line automation system of the present invention configured as described above, when monitoring the system information of the distribution line via the old slave station device 1, the monitoring command transmitted from the IP communication (TCM) function unit 5 is optically transmitted. The optical signal is converted by the unit 7 and transmitted to the IP converter 27 installed for each old slave station device 1 through the optical fiber 8.

  The IP converter 27 converts the optical signal into an electric signal by the optical communication unit 28, and then, for example, performs frequency shift keying and transmits it to the old slave station device 1. The old slave station device 1 that has received this transmits the state data of the distribution line according to the monitoring command of the master station device 3 to the IP converter 27.

  The IP converter 27 converts the received signal into a signal corresponding to the IP network by the IP conversion unit 29, and then adds the time information obtained by the time synchronization function unit 30 to the state data and saves it. Is converted into an optical signal and transmitted to the optical communication unit 7.

  The optical communication unit 7 converts the received optical signal into an electrical signal and transmits it to the master station device 3, and the main computer 3 a of the master station device 3 collects the distribution line state data obtained by the old slave station device 1. Thus, the current system state of the distribution line can be grasped.

  On the other hand, even after the IP converter 27 stores the state data of the distribution line to which the time information is added, it acquires the state data from the old slave station device 1 and stores the acquired state data by adding the time information. Is repeatedly executed, and the state data to which time information is added is accumulated.

  Then, when a monitoring command is transmitted from the master station device 3 to the old slave device 1 and this command is received by the IP converter 27, the IP converter 27 adds the stored time information to the distribution line. The latest state data is selected from the state data and transmitted to the main computer a of the master station device 3.

  That is, the distribution line automation system of the present invention is not a method of sequentially monitoring a plurality of old slave station devices 1 by the communication (TCM) device 16 as in the conventional distribution line automation system shown in FIG. The possible IP (TCM) function unit 5 can collect distribution line state data in a short time via a plurality of old slave station devices 1.

  By shortening the collection time of the distribution line state data in this way, it is possible to monitor hundreds of old slave station devices 1 at almost the same time, and the master station device 3 accurately obtains system information at a specific time. It becomes possible to grasp.

  Note that the time synchronization function unit 30 of the IP converter 27 may employ any known synchronization method such as using GPS or network distribution.

  As described above, the distribution line automation system according to the present invention is capable of rationally promoting the use of IP for communication, even in the situation where the old slave station device and the new slave station device coexist in the distribution line system. Status data can be collected in a short time.

  In addition, since a large amount of system information in the same time zone can be collected and a wide range of system states can be grasped at an early stage, the reliability of system operation operations such as voltage control can be improved.

  INDUSTRIAL APPLICABILITY The present invention is applicable to any remote monitoring control system that connects a slave station device and a master station device with an optical line and acquires status information by remote monitoring and remote control of equipment.

DESCRIPTION OF SYMBOLS 1 Old slave station apparatus 2 New slave station apparatus 3 Master station apparatus 3a Main computer of master station apparatus 4 Communication port 5 IP communication (TCM) function part 6, 13, 15 Ethernet LAN
7, 10, 28 Optical communication unit 8, 19 Optical fiber 9 (9a, 9b, ...), 20 Demultiplexer 11, 23, 31 DC power supply unit 12 Optical communication unit 14, 26 Power supply line 16 Communication (TCM) device 17, 25 Signal line 18, 24 Optical communication device 21 O / E converter 22 Data converter 27 IP converter 29 IP converter 30 Time synchronization function unit

Claims (3)

Connect the slave station device installed in the distribution line system to the master station device installed in the sales office of the power company with a communication line, and grasp the system status via the slave station device by remote monitoring from the master station device In each distribution line automation system that realizes remote control of power distribution equipment and distribution equipment, it is installed for each slave station device that does not support IP communication, and system communication is acquired and stored by continuously performing analog communication with the slave station device. In accordance with a monitoring command from the master station device by IP communication, a converter is provided that selects the latest state data of the distribution line previously stored and returns it to the master station device by IP communication. Distribution line automation system.   2. The converter according to claim 1, wherein the converter has a time synchronization function, and is configured to add time information to the distribution line state data continuously acquired from the slave station device and store the time information. Distribution line automation system.   The distribution line automation system according to claim 2, wherein the converter is configured to realize the time synchronization function by GPS or network distribution.

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