JPH0591657A - Power distribution general automatic system using existing network and repeating station - Google Patents

Abstract

(57) [Summary] [Purpose] By using the existing network,
Provide a new system and relay station to build an economical total automation system for power distribution. [Structure] Provide a relay station to connect the newly installed transmission medium to the existing high-voltage distribution system, low-voltage distribution line carrier system, and CATV system and the existing network equipment, and connect each relay station with a dedicated line. Enables monitoring and control of high-voltage distribution system and low-voltage distribution system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated distribution automation system and a relay station for constructing this system.

[0002]

2. Description of the Related Art There are following conventional A / B automatic distribution systems.

A. High voltage distribution system automation system.

The constituent elements of this are as follows (1),
There are (2) and (3).

(1) An automated system for a high voltage power distribution system.

(2) An automatic distribution system for superimposing a signal on a zero-phase circuit of a three-phase high-voltage circuit to monitor and control a pole switch.

(3) A pole switch control system using an overhead ground wire as a signal transmission medium.

B. Low voltage distribution system automation system.

The constituent elements of this are as follows (1),
There is (2).

(1) A ripple control system that superimposes a control signal on the secondary side of a pole transformer of a low voltage distribution line and sends a command to a slave station of a low voltage customer.

(2) A current answerback system that utilizes the fact that the impedance on the power source side is low, and transmits the information of the low-voltage customer as a current signal to the master station installed in the substation.

C. Total distribution automation system.

The constituents of this are as follows (1).

(1) A relay station and a low-voltage customer, which use optical fibers for all transmission media forming a network, control a high-voltage distribution system, control a monitoring command signal and a low-voltage distribution system, and relay the monitoring command signal. A comprehensive automation system for power distribution in which a network is composed of distributors that branch signals to.

Of the integrated distribution automation systems, the only one that employs a relay system is the integrated distribution automation system of Kyushu Electric Power Co., Inc. This system employs optical fibers as a transmission medium for all devices from a central unit to low-voltage customers to form a network.

[0016]

By the way, the above A, B
The distribution automation system based on is intended only for the automation of the high-voltage distribution system and the automation of the low-voltage distribution system.To build a network of the comprehensive distribution automation system, new equipment to combine these is required. Is.

Further, in the distribution automation system described in the above C, all are constructed by new equipment, and extremely high cost is required to realize this.

The conventional relay station was developed for the purpose of newly constructing all equipment, and it is not possible to construct a new network of the integrated distribution automation system using this relay station. , Very expensive construction cost is required.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a novel system and a relay station capable of economically constructing a network of an integrated distribution automation system by utilizing an existing network. To provide.

[0020]

Means and Actions for Solving the Problems
There is a relay station that connects the newly installed transmission medium to the existing high-voltage distribution system, low-voltage distribution line carrier system, and CATV system in order to build a network of the integrated distribution automation system. As a result, a network of integrated distribution automation systems will be built, and it will be possible to greatly improve economic efficiency.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing an example of construction of a network for a distribution automation system. That is, the high voltage distribution system distributes the high voltage from the substation 3 through the high voltage distribution line 6,
The pole transformer 20 near the customer makes the voltage low, and the low-voltage distribution line 10 connects the home terminal unit 21 of the customer A, for example, to supply low-voltage power. In addition, the low voltage distribution line transport system is
Information is exchanged with the home terminal unit of the customer A by using 0 as a transmission medium, and the power waveform supplied through the pole transformer 20 is used by the low voltage carrier relay station 17 and the carrier coupler 19 for home Both are exchanged by superimposing a transmission / reception signal with the terminal. on the other hand,
The CATV network includes a headline amplifier 22, a mainline distribution amplifier 2 and a mainline distribution amplifier 2 of the CATV system central station 4.
The CATV trunk signal 28 in both the up and down directions via 3 is relayed by the CATV relay station 24.
From the distribution amplifier 25 and the tap-off 26 to the home terminal unit 27 of the customer B, for example, bidirectional CA
It is designed to send and receive TV signals.

The existing communication network is newly connected to these existing networks by relay stations 13 and 16 for relaying the upstream and downstream trunk line signals from the multiplexer 2 of the central unit 1 by the communication trunk line 7 and the connection with the low voltage line carrier system of the existing equipment. The low-voltage carrier relay station 17, the CATV relay station 24, and the dedicated lines 8 and 9 which are linking devices connecting these relay stations form a network. Then, monitoring of the automatic switches 11 and 14 of the trunk signal relay stations 13 and 16 and the home terminal units 21 and 27 of the low voltage consumers A and B,
It is an integrated distribution automation system that issues control commands.

By installing the trunk signal relay stations 13 and 16, the low voltage carrier relay station 17 and the CATV relay station 24, the existing CATV equipment 28 and the low voltage distribution line 10 are installed.
It is possible to effectively utilize the low-voltage distribution line carrier system, transformer substation 18, switchgear substations 12, 15 and automatic switches 11 and 14, which is economical in constructing an integrated distribution automation system. It will be greatly improved.

Next, a concrete configuration example of these relay stations will be described with reference to FIG. Trunk signal relay terminals 62, 6
The upstream / downstream bidirectional main line signal 80, which is a multiplexed signal by the multiplexing device 2 of the central device 1, transmitted / received from the central device 1 is separated by the demultiplexer 34 for separating the upstream signal 81 and the downstream signal 82, respectively. It is demultiplexed by 35. Then, the separated signal is amplified by the amplifier 39 for amplifying the separated signal, and the demultiplexer 40 extracts the down signal ch1 such as the command to the switch 14 and the control to the home terminal units 21 and 27 and the monitoring command. This is the duplexer 42 for the down signal.
The signals 58 and 59 once separated by the above are demodulated to become a control command, and the downlink signal demodulation units 44 and 45 and the downlink signal modulation conversion unit 4 that change the modulation method according to the connection system.
6 and 47, and outputs to the demultiplexers 52 and 53 for separating the upstream signal Md1 and the downstream signal Md1 ′ of the connected system.
The duplexers 52 and 53 are connected system terminals 54 and 55.
Connected to the consumer A,
It is designed to be transmitted to the home terminal units 21 and 27 of B.

On the other hand, Mup1, Mup1 of the up signal 57 from the customers A, B entering from the connecting terminals 56, 57.
′ Is separated by the demultiplexers 52 and 53, becomes response signals 60 and 61 via the upstream signal demodulation units 50 and 51 and the upstream signal modulation conversion units 48 and 49, and becomes the upstream signal ch1 ′ at the mixer 43. Then, the mixer 41 combines the other trunk line upstream signals 84 to form a trunk line upstream signal 81.

Numerals 83 and 84 are upstream and downstream trunk signals after being demultiplexed by the relay station 33, which are transmitted to other relay stations as a signal 85, and a trunk signal 80 is bidirectional between upstream and downstream. The signal is shown.

In this way, the relay station 33 is the slave station 16 of the switch 14 in the main line of the high voltage distribution system shown in FIG.
Connected to the switch terminal slave station 12, 1
5 and the connecting terminal 55 is connected to the low-voltage carrier system including the low-voltage distribution line 10 and the CATV system including the CATV trunk signal 28, the home terminal units 21 and 27 of the customers A and B.
It becomes a terminal for sending and receiving. Furthermore, this relay station 33
Is used for the low-voltage transfer system, one of the connection terminals 54, 55 is used as a transmission / reception terminal for the transformer slave station 18, and the other connection terminal is used as a connection terminal for the low-voltage transfer system.

Therefore, by using the relay station 33, the connection with the existing system becomes possible.

The demultiplexers 34 and 35 for separating the upstream and downstream bidirectional main line signals 80 change their circuit configurations depending on the modulation system of the main line signals. The same applies to the demodulation circuits 44, 45, 50, 51.

The CATV relay station 24 may be provided not only on the customer side of the main line distribution amplifier 23 but also at the input section of the head end 5 of the CATV system central station 4.

Next, a concrete configuration of the relay station according to another embodiment will be described with reference to FIG. The relay station 64 can be linked with three different systems.
The trunk line signal connecting terminals 65 and 65 'are provided for interrupting the communication trunk line of the system to be connected. Demultiplexer 6 for separating and combining signals in the same direction
6, 66 ', amplifier 6 for amplifying the separated signals
9 is installed. The down signal of the trunk signal is the demultiplexer 6
7, the first logic unit and the storage unit 7 via the demodulator 70
It is entered in 2 and is temporarily stored here. On the other hand, the upstream signal transmitted by the relay station 64 is the modulator 71 and the mixer 68.
Merge with the upstream signal of the main line via.

Therefore, the trunk line signal connecting terminals 65 and 6
5 ', demultiplexers 66, 66', demodulator 70, modulator 71,
The first logic unit 72 makes it possible to relay the trunk signal in both the up and down directions.

On the other hand, when linking with the switch slave stations 12 and 15 and the transformer slave station 18 in the integrated power distribution automation system or linking between two relay stations, the connecting terminal 73 and the connecting terminal 74 are used. To use. These connecting terminals 7
Denoted at 3 and 74 are demultiplexers 75 and 76 for separating up and down bidirectional signals, and modulators 77 and 7 for modulating down signals.
8. Demodulators 79 and 80 for demodulating upstream signals, second and third logic units and storage units 80 and 81 for relaying and managing signals of each system are connected in parallel. It is possible to connect two different systems by adjusting the software configuration of the third logic units 80 and 81 and adjusting each component. And the first, second and third
The logical units and the storage units 72, 80, 81 of FIG.
It will be possible to connect the three systems managed by. In the relay station of this example, the demultiplexer for separating the main line signal changes its circuit configuration depending on the modulation system of the main line signal. The same applies to the demodulator. The duplexer that separates the upstream signal and the downstream signal of the system to be connected is adjusted according to the modulation method of this system. The same applies to the demodulator. Further, the first, second and third logic units 72, 80 and 81 are CPU, RO
It may be something other than M or RAM.

[0034]

As described above, the integrated automatic distribution system using the existing network of the present invention can effectively use the existing network equipment as it is.
By installing a relay station, a new integrated distribution automation system will be created, which will be an extremely economical network.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of construction of a network for an integrated distribution automation system showing an embodiment of the present invention,

FIG. 2 is a block diagram showing a configuration example of a relay station,

FIG. 3 is a block diagram showing another configuration example of a relay station.

[Explanation of symbols]

1 Central device 3 Substation 4 CATV system central station 6 High-voltage distribution line 7 Communication trunk line 8, 9 Link device connection line (dedicated line) 10 Low-voltage distribution line 11, 14 Pole switch (controller) 16, 17, 24 Relay station 22 main line amplifier 34,35,40,42,52,53,66,66 ',
67,75,76 Demultiplexer 44,45,50,51,70 Demodulator 46,47,48,49,71 Modulator

Claims (2)

[Claims] 1. A relay station for separating and relaying a main signal in the vicinity of a pole switch of a high-voltage distribution system, and a transformer monitoring and control instruction and a low voltage customer's monitoring and control instruction in the vicinity of a pole transformer. The relay station for relaying and the relay section for separating and mixing low voltage consumer monitoring and control commands with the CATV system trunk signal are installed at the output of the trunk distribution amplifier of the bidirectional CATV system. An integrated distribution automation system and relay station for existing networks, which enables monitoring and control of high-voltage and low-voltage distribution systems by connecting with. 2. A network comprising an existing high voltage distribution system, a low voltage distribution carrier system and a CATV system,
In a total distribution automation system with a new network of relay stations installed, a controller, modulator / demodulator,
It has a repeater station that is a demultiplexer and a multiplexer system, a controller, and two relay stations that have a modulator / demodulator and a demultiplexer as one system. By connecting each of them with a dedicated line, different systems can be matched. A relay station in an integrated distribution automation system that uses an existing network.