JPS61103336A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To reduce cable length between device at side and a primary converter and to improve the intrusion of surge by assembling a switch circuit for the primary converter and a measured input to the devices at site supervised and controlled and inputting information to a remote supervisory equipment at a slave station through an optical cable. CONSTITUTION:Plural pieces of measuring information 12 from the devices at site to be supervised and controlled are subject to primary conversion 11 and inputted to a gate circuit 53. The switching signal 28 of measured input from the P/S converter 24 of a remote supervisory controller 2 at the slave station is subject to E/O conversion 52 and transmitted to an optical cable 4a. The signal is subject to O/E conversion 51 at a measuring input switch circuit 5, S/P conversion 52 to set sequentially gate circuits 53. The analog measuring information outputted sequentially by the gate circuit 53 applies pulse modulation at a modulation circuit 54, the result is subject to P/S conversion 55, E/O conversion 56 and transmitted to an optical cable 4b. The controller 2 applies O/E conversion 27 to the signal, modulation 25 and the signal is transmitted to a master station through a transmission line 3. Thus, the cable length between the devices at site and the primary converter is decreased so as to reduce the intrusion of surge.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a remote monitoring and control device that is widely applied in power system monitoring and control systems.

[Technical background of the invention and its problems]

In a conventional power system monitoring and control system, a slave station remote monitoring and control device (hereinafter referred to as 2, referred to as a slave station remote control device).

The measurement input information is converted by the primary converter on the primary converter board to a level that can be transferred to the slave remote control device. -Output from the next switch #Received by the analog input circuit of the remote control device, P
The analog scanning circuit is driven according to the measurement input switching signal (address signal) from the /S converter, and the measurement information from the analog input circuit is switched and inputted to the human / D conversion circuit one quantity at a time, and the A/D conversion circuit After converting the analog signal into a digital signal, the signal is frequency modulated by a modulator and transmitted to the master station remote control device via a transmission path.

However, since the input of general 52 measurement information to the slave station remote control device is a low level signal (Q-1mA, O~5Y, etc.),
- Place the next converter board near the slave station remote control device (layout of side-by-side boards, front and back boards, etc.) (two branches are included).

In addition, because the input information light to the primary converter on the -order converter panel is used for each field device, the number of measurement cables is required, and the cable length is also long.

Therefore, there is a risk of surge intrusion from field equipment before the primary converter C is powered by two people.

[Purpose of the invention]

Regarding the input of measurement information to the slave station remote control device, a -order converter panel is not installed (: the primary converter and measurement input switching circuit are built into the field equipment side, and input to the slave station remote control device via an optical cable. The purpose is to

[Summary of the invention]

The present invention converts the measurement input switching signal (address signal) from the P/S converter of the remote station remote control device into B10fi, inputs it to the measurement input/switching circuit of the field equipment via the optical fiber, and performs measurement. Input/switching circuit - Q/Fi conversion? l 8 /
After converting P to K, the measurement input switching signal (address signal) (U) and the measurement input information from the primary converter are switched, P/8 conversion is performed in units of l, and after E10 conversion, the slave station remote control device (two This invention is a remote monitoring and control device that requires manual input.In other words, the present invention is a remote monitoring and control device 11; A device consisting of an input/switching circuit is installed, and an optical cable is used to connect this device to the remote monitoring and control device of the slave station, and measurement information is encoded and input to the remote monitoring and control device of the slave station via the optical cable. This is a remote monitoring and control device.

[Embodiments of the invention]

Next, examples of the present invention will be described. The drawing shows two devices near the field equipment to be monitored or controlled, measurement information 12' that can be transmitted from the field equipment, a primary converter 11 that converts signals, and the output side of the primary converter 11 (: connection n%
A gate circuit 53 that controls the conduction of the measurement information 12 by the switching signal 4, and a gate circuit 53 that is installed in the slave station remote control device 2 and controls the switching signal 2.
8'lk: Parallel-to-series P/S converter and P/S converter
Switching signal 28'Jk converted from parallel to serial using 8-channel converter
: E10i converter 26 for electrical-to-optical conversion.

connected to the B10 converter 26 via the optical cable 4a;
The Oβ converter 51 performs optical-to-electrical conversion of the switching signal 281 that is converted from electrical to optical. 2 is input via the gate circuit 53 which is turned on by the switching signal 28.
A modulation circuit 54 modulates the measurement information 12 obtained by modulating the measured information 12, a P/S switcher 55 that converts the nTC measurement information 12 modulated by the 1st modulation circuit 54 from parallel to serial, and a P/8 switcher 55 that converts the nTC measurement information 12 in parallel. B converting the serially converted measurement information 12 from electrical to optical
10 converter 56, and an optical cable 4b that transmits the measurement information 12 that has been electrical-to-optical converted by the E10 converter 56 to the master station remote control device 1 (not shown) via the slave station remote control device 2. The figure shows a remote monitoring and control device.

That is, the switching signal A of the measurement input from the P/S converter 24 of the slave station remote control device 2 is converted from electric to optical KPk by the B10 converter 26.
measurement input/switching circuit 5 via optical cable 4a.
After inputting into the 0/Ea converter 51 and converting it from optical to electric, S/P
The converter 52 converts the switching signal 28 into serial and parallel signals, and switches the gate circuit 53. The measurement information 12 is the gate circuit G53CO of the measurement input/switching circuit 5 via the primary replacer 11 ~ 1 mA
(0 to 5 V, etc.) is input to the modulation circuit 54.
The analog signal is pulsed one by one (pulse and FlCPCM method 1, etc.) at the P/B converter 55, and after parallel and serial conversion, electrical-to-optical conversion is performed at the E10 summer converter 56, and the optical cable 4b is output. O/F of slave station remote control device 2 via! The signal is input to the converter 27, where it is optical-to-electrically converted and modulated by the sub-liquid device 25C, and the measurement information is transmitted to the master station remote control device via the transmission line 3.

The switching timing of the gate circuit VI 553 of the measurement input/switching circuit 5 is set to the time per one transmitted word.

Note that the measurement input/switching circuit 5 can be configured using a board.

As a result of the above, the number of cables between the primary converter and the slave station remote control device and between the field equipment and the primary converter for importing measurement input information to the slave station remote control device can be reduced. Second, it becomes unaffected.

In this embodiment, the type of transmission of measurement input information is described as C: a constant transmission item, but processing such as 1 selection, subcommutation, supercommutation, etc. is also possible. Type I of measurement information: Although not described, it is assumed to be all information input to the slave station remote control device via an equal-order converter, such as current, voltage, and electric energy.

The measurement input/switching circuit 5° modulation circuit 54 shown in the drawing can also be used in combination with a conventional analog foot circuit/digital conversion circuit.

;-1 [Effects of the Invention] Conventionally, measurement information was input to the slave station remote control device by installing a primary converter panel near the remote control device and mounting the −order converter in the field equipment. There were a large number of cables from the main converter panel to the primary converter panel, and there was a risk of surge intrusion. According to the present invention, the field equipment side (knee switch and measurement input/
Since a switching circuit is incorporated and input can be made to the slave station remote control device using optical fiber, the cable length between the field equipment and the primary converter can be reduced and surge intrusion can be improved.

[Brief explanation of drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a remote monitoring and control device showing an embodiment of the present invention in the drawings. 11...-Next thigh converter Envy...E10fi converter 51...O/B converter 52...S/P converter 53...Gate circuit 54...Modulation circuit 55
...P/Si converter 56...E10 converter agent Patent attorney Noriyuki Chika (and 1 other person)

Claims (1)

[Claims] A primary converter installed near the field equipment to be monitored or controlled and converts the measurement information transmitted from the field equipment into a signal; a gate circuit that controls conduction of the measurement information; a first P/S converter that is installed in the slave station remote control device and converts the switching signal from parallel to serial;
a first E/O converter that performs electrical-to-optical conversion of the switching signal converted from parallel to serial by the /S converter;
A first O/O/R is connected to the converter via a first optical cable and converts the electrically-optically converted switching signal from optically to electrically.
an S/P converter that converts the switching signal optically-to-electrically converted by the first O/E converter into serial-to-parallel and outputs it to the gate circuit; a modulation circuit that modulates the measurement information inputted through the gate circuit that has become conductive; and a second P/R that converts the measurement information modulated by the modulation circuit from parallel to serial.
an S converter, a second E/O converter that performs electrical-to-optical conversion of the measurement information converted from parallel to serial by this second P/S converter, and this second E/O converter. Therefore, the measurement information that has been converted into electricity and light is transmitted through the slave station remote control device,
or a second optical cable for transmitting data directly to the master station remote control device.