JPS61103335A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To duplicate easily a remote supervisory line by dividing an input signal into two, transmitting one signal as it is and storing other signal to a buffer and then transmitting to a low speed line so as to use a line having a different transmission speed. CONSTITUTION:A control station 1 scans (3) an input signal ID via an input circuit 2 and distributes it into two at a P/S converting section 4. One signal is subject to P/S conversion 4a and modulation 5a as it is and transmitted to a transmission line 7a. The other signal is stored in a full word buffer 4c, converted into a low speed by a P/S converter 4b, subject to modulation 5b and transmitted to a low speed transmission line 7b. In a station 8 to be controlled, the signal transmitted through the transmission lines 6a, 6b is subject to demodulation 10a, 10b, the transmission line is switched (9), the signal is subject to S/P conversion 11 and output information 00 is outputted from an output circuit 13 via a distributor 12. Thus, lines having different transmission speeds are used to duplicate the supervisory lines and cope with the increasing information amount. This system is suitable for the smooth operation of power systems.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a remote monitoring and control device for a centralized control system.

[Technical background of the invention and its problems]

Generally, in a centralized control system, a remote monitoring control device at the control center receives input information from remote monitoring and control devices at multiple controlled stations, such as supervision (8V) and telemeter (TM), or inputs input information from multiple remote monitoring and control devices at multiple controlled stations. Control information (output information) is output to the system as backup protection in the unlikely event of transmission line failure or maintenance.

In many cases, the transmission path is duplicated.

However, with conventional remote monitoring and control equipment, when duplicating transmission lines, transmission lines are switched only between transmission lines with the same speed, and if transmission lines with the same speed cannot be secured, different transmission lines are switched. Should I give up on switching the transmission line while waiting for speed, or is it impossible? - It was necessary to newly install the same speed transmission line.

With conventional remote monitoring and control equipment, when duplicating transmission lines, switching between transmission lines is performed only between transmission lines with the same speed, and when transmission lines with the same speed cannot be secured, or , the amount of information increases) If you want to adopt a second route that waits for a faster transmission speed than the existing transmission speed, you must either give up on switching between transmission lines with different transmission speeds, or force a new transmission path with the same speed. However, there was a risk that it would interfere with the smooth operation of the power system.

[Purpose of the invention]

The present invention was developed in order to eliminate the above-mentioned drawbacks of the conventional technology, and by improving the control center equipment and controlled equipment to configure two transmission routes with different transmission speeds and making it possible to switch between them. There is no need to give up on switching transmission lines waiting for a different transmission speed, and there is no need to forcibly create a new transmission line with the same speed.

Increasing amount of information C: When constructing a new second route transmission line, smooth operation of the power system is possible without being constrained by the transmission speed of the existing first route transmission line (2) Remote monitoring and control It provides equipment.

[Summary of the invention]

In the present invention, the control center equipment and the controlled equipment are connected via two routes of transmission lines. By providing a function to switch the clock cycle of the P/S converter, it is possible to switch between transmission lines with different transmission speeds, enabling smooth operation of the power system. This is a remote monitoring and control device with the following characteristics.

[Embodiments of the invention]

Next, two embodiments of the present invention will be explained. The drawing shows an input circuit 2 that level-adjusts or digitally converts the information signal ID, and an input circuit 2 that level-adjusts or digitally converts the information signal ID If''Lm information signal ID. a scanner 3 for scanning;
Connected to the output side of the scanner 3 and output from the scanner 3 nZ
A P/S converter 4a that converts the information signal ID from parallel to serial; and a modulator 5a that is connected to the P/B converter 4a and modulates the information signal ID.

The information signal I is connected to the modulator 5a via the transmission path 7a.
A demodulator tOa that demodulates D and the output side CP of the scanner 3
A data buffer 4c is connected in parallel with the S converter 4a to temporarily store the information signal ID, and a data buffer 4c is connected to the output side of the scanner 3 via the data buffer 4C to store the information signal ID in the data buffer 4C. Information signal ID to P/S converter 4
P/S converter 4b that performs parallel-to-serial conversion at a speed different from g
and P/B converter 41)! -Connection n″?: Information signal I
A modulator 5b that modulates the information signal iD, and a demodulator 10b that is connected to the modulator 5b via a transmission line 7b and demodulates the information signal iD.
and a transmission path selector switch 9 connected to the demodulator fob and the demodulator tOa, and switching to one of the demodulators 10a and 10b according to the carrier frequency of the demodulator tOa or the carrier frequency of the demodulator lOb. 8/Pi converter 11 connected to the transmission line changeover switch 9 and converting the information signal ID from serial to parallel according to the switching state of the transmission line changeover switch 9;
and.

Distributor J2 and 1 distributor 121 that distribute the information signal ID outputted from the S/P converter 11: Therefore, the information signal ID output from the S/P converter 11 is distributed r'L.
, level adjustment or analog conversion of information No. 1j ID.

The figure shows a remote monitoring and control device including an output circuit 13 that outputs output information OD.

That is, the Sv of each electrical device is contained in r'L at the controlled station l.

The TM information, that is, the information signal ID, is level-adjusted or digitally converted by the input circuit 2, and each input information is scanned by the scanner 3. In the P/S converter 4, the pit parallel signal is converted into an i-bit column signal, but on the high-speed transmission side, only the P/S converter 4a outputs the signals from the scanner 3 at the same speed. , the above process of sending all data will take a while.
2 doesn't match.

A total data buffer 4C is provided to store all data, and the stored contents are sequentially transmitted by a P/S converter 4b with a different clock cycle on the low-speed transmission side in a processing time suitable for the transmission speed. nru.

Therefore, the input information is output from each P/B converter 4m, 4b, and is sent to the control center 8 via each modulator 5i, 5b for a different transmission speed, and each transmission line 7m, 7b with a different speed. Each demodulator for a different transmission rate toa, tobC=
The input signal is demodulated from the modulated signal t, and the transmission path selector switch 9 switches it to one of the transmission path signals 71. ,
The P/S converter 11 converts the pit serial signal into a bit parallel signal. The transmission speed is switched to the low speed side or the high speed side depending on the transmission speed.

i): The transmission path switching switches 5'-9 are each demodulator Log.

It detects a TAB carrier frequency disconnection and automatically switches the signal to a healthy transmission path, and also has a function that allows manual switching.

The output data of the S/P converter 11 is distributed to each output information by the distributor 12, level adjusted or analog replaced by the output circuit 13, and outputted to the system supervisory board of the control center 8 as output information OD.
It is displayed on the control desk or output to the central control computer system.

In addition, the control information (output information) of the control center is transmitted by the remote monitoring and control equipment arranged in the opposite manner as described above, but the configuration diagram and explanation are omitted. Transmit data via a faster transmission path,
As a backup in the unlikely event of transmission line failure or maintenance,
The other transmission line with a slower transmission speed can be used.

As mentioned above, in the nest control system, in addition to the example of one remote monitoring and control device of a controlled station facing each other, as a modified example (not shown), - remote monitoring of a plurality of controlled stations as seen from the control center. Control device I: can also be used as a plurality of opposing devices.

〔Effect of the invention〕

As described above, in a remote monitoring and control device of a centralized control system that centrally controls a plurality of controlled stations, the case where a transmission path of the same speed cannot be secured according to the remote monitoring and control device of the present invention. , or an increase in the amount of information (2) If you want to adopt a second route with a transmission speed of 40' that is faster than the existing transmission speed, it is necessary to switch the transmission paths with different transmission paths and manage the smooth operation of the power system. This makes it possible to realize a remote monitoring and control device that has the ability to

[Brief explanation of drawings]

The drawing is a configuration diagram of a remote monitoring and control device showing an embodiment of the present invention. 2... Input circuit 3... Scanner 4m, 4b
...P/S fi converter 4c...All word buffer memory 5a*5b...Modulators 7a, 7b...Transmission line 9...Transmission line changeover switch 10...Demodulator 11...8/P converter 12...Distributor 13...Output circuit agent Patent attorney Nori Chika: Dasuke (and 1 other person)

Claims (1)

[Claims] an input circuit for level-adjusting or digitally converting an information signal; a scanner for scanning the information signal level-adjusted or digitally converted by the input circuit; and a scanner connected to the output side of the scanner for scanning the information signal. a first P/S converter that performs parallel-to-serial conversion of the information signal output from the device; a first modulator that is connected to the first P/S converter and modulates the information signal; a first demodulator connected to the first modulator via a transmission path to demodulate the information signal;
a data buffer connected to the output side of the quantitative device in parallel with the first P/S converter to temporarily store the information signal; and a data buffer connected to the output side of the scanner via the data buffer. a second P/S converter that converts the information signal stored in the data buffer from parallel to serial at a speed different from that of the first P/S converter;
a second modulator connected to the S converter to modulate the information signal; a second demodulator connected to the second modulator via another transmission path to demodulate the information signal; This second
and the first demodulator, and the output is switched to one of the two sets of demodulators depending on the carrier frequency of the first demodulator or the carrier frequency of the second demodulator. a transmission line changeover switch, and an S/P converter connected to the transmission line changeover switch and converting the information signal from serial to parallel according to the switching state of the transmission line changeover switch;
Remote monitoring comprising a distributor that distributes the information signal output from the S/P converter, and an output circuit that adjusts the level or converts the information signal distributed by the distributor into analog. Control device.