JPH0541882A - Remote supervisory control system - Google Patents

Abstract

PURPOSE:To improve the sophisticated remote maintenance function by allowing the operator to recognize the environment state of a slave station equipment with video information and audio information. CONSTITUTION:Video information by the ITV 23 of a slave station equipment 10 and audio information by a microphone 17 are sent to a master station equipment 6 via a board area communication network 11 and outputted to a monitor/key board 14 or a speaker 16. The data for supervisory and the control of a plant between the slave station device 10 and the master station device 6 is sent via a private line 3. The master device 6 confirms the adequacy of the revision of a control program or the like by a simulator 22 via the private line 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control system applied to electric power control or electric railway control.

[0002]

2. Description of the Related Art An example of a conventional remote monitoring control system is shown in FIG.

This remote monitoring and control system comprises a parent system 1 constructed at a central power supply station, a grid control station, etc., and a plurality of child systems 2 installed at substations, power plants, etc. It is connected by a dedicated line 3. In the parent system 1, the host computer 4 is duplicated, and the host computer 4, the system monitoring board controller 5 and the duplicated parent station device 6 are linked by the LAN 7, respectively. Further, the system monitoring panel controller 5 is connected to a system monitoring panel 8 which informs an operator of monitoring information from the slave system 2 and control response information by a lamp or a display.
A dedicated line switching device 9 for switching the line from the dedicated line 3 to one of the parent station devices 6 is connected to the parent station device 6. The slave system 2 includes a plurality of slave station devices 10.

With the above configuration, the information from the plant is input to the slave station device 10, and the information on this plant is sent to the private line 3
Is transmitted to the master station device 6 via. The information of this plant is displayed on the system monitoring board 8 by the processing of the system monitoring board controller 5, and the operator grasps the operating state of the plant. On the other hand, in the parent system 1, the slave station device 1
From 0, automatic control is performed via the dedicated line 3 based on plant information, and plant control is instructed by the operator. In this way, the plant information is sent to the private line 3
Is communicated to the parent system 1 via the
The plant was remotely controlled via the dedicated line 3.

[0005]

However, the conventional system has the following problems. In the above-mentioned system, various improvements such as speeding up of data communication, increase in capacity, addition of event recorder function, improvement of data editing function and diagnosis function have been performed and operated. On the other hand, there are also demands for higher functionality, more compactness, and higher reliability. Especially, with the unmanned expansion of the slave station installation location, further remote maintenance functions,
The need for improved automation has become stronger.

However, in the conventional apparatus, the information handled by the system is basically display data, telemeter information, control commands and their responses, even if various functions are improved.
There is a problem that it is difficult to link the remote maintenance to more advanced than it is because it is diagnostic information. Specifically, not only the conventional binary information for plant monitoring and control, but also the image of the installation location of each slave station in the distance and the state of the environment are added to the image and audio information, and the operator at the central power supply station or system control station. From the point of view, it was necessary for remote maintenance to have a realistic environment, as if you were at the site of each slave station. In addition, a high-level remote maintenance function has been required by remotely changing the sequence of a remote station (control program or parameter change) and easily confirming the change.

Therefore, an object of the present invention is to provide a remote monitoring and control system capable of improving an advanced remote maintenance function and an automation function by using a wide area communication network.

[0008]

The present invention is to monitor and control a plant via a communication means between a parent station installed at a central power supply command station and a slave station installed at a substation. In the remote monitoring and control system for communicating data for, the slave station has a collecting means for collecting the video information and the acoustic information of the plant, and a voice information output means for outputting the voice information from the master station. On the other hand, the master station comprises means for outputting video and audio information from the slave station, and audio information input means for inputting audio information to the slave station,
Further, as a communication means between the two stations, a wide area communication network for communicating the above-mentioned respective information and a data dedicated line for monitoring and controlling the plant are provided.

[0009]

With the above structure, the data for monitoring and controlling the plant is communicated between the master station and the slave station via the dedicated line, while the image information and the sound information of the plant and the slave station are transmitted through the wide area communication network. It is communicated to the master station side via. The master station outputs video information and audio information. The operator can visually and aurally check the environment of the remote station. Therefore, the operator can perform the remote monitoring control as if he / she were at the slave station.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a remote supervisory control system showing an embodiment of the present invention. 7 is different from FIG. 7 in that a parent system 1 constructed at a central power supply command station or a grid control station, and a child system 2 installed at a substation or power plant, etc., are composed of a dedicated line 3 and a wide area communication network 11. Connected by two types of communication lines, digital information between both systems,
The point is that it is configured to be able to transmit data such as image information and audio information.

Further, in the present embodiment, the means for transmitting the control program of the parent side system 1 and the information for changing the parameters of the child side system 2 via the dedicated line 3 and the child side system 2 correspond to this. And a means to process changes,
And means for confirming the change by the simulator.

Therefore, the parent system 1 includes a wide area communication network interface 12, a switching device 13, a monitor / keyboard 14, a voice input / output device 15, a speaker 16, and a microphone 1.
7 and the wide area communication network switching device 18 are added to FIG. The slave station device 10 of the slave system 2 includes a speaker 16, a microphone 17, a slave station basic unit 19, a slave station wide area communication network interface 20, an input / output switching device 21, a simulator 22 and an ITV 23.

Here, the wide area communication network 11 is used for transmission of digital information, images, voices, etc. separately from the dedicated line 3. The wide area communication network interface 12 has a function of inputting and outputting information from the wide area communication network 11 and the master station device 6
Is duplicated corresponding to. The switching device 13 is provided corresponding to the duplicated wide area communication network interface 12, and switches to either one. Monitor / Keyhold 14
Displays image data and is used as an operator's dialogue device. The voice input / output device 15 outputs voice from the speaker 16 and inputs voice from the microphone 17. The wide area communication network switching device 18 is provided corresponding to the duplicated wide area communication network interface 12 and switches to either one.

The slave station basic unit 19 comprises an arithmetic function, an input / output function, a dedicated line interface function, and the like. The slave station wide area communication network interface 20 functions as an input / output unit with the wide area communication network 11, and also has an input / output processing with the ITV 23, the speaker 16, and the microphone 17. The input / output switching device 21 switches input / output signals from the plant or from the simulator 22 according to a command from the master station device 6 via the dedicated line 3. The simulator 22 simulates a plant. Although FIG. 1 shows one child-side system 2, there are a plurality of child station devices 10 in a medium-scale site.

Next, the main components of this embodiment will be specifically described.

First, as shown in FIG. 2, the master station device 6 has μ
A LAN station 25 and a plurality of leased line communication interfaces 26 are provided around a master station operation unit 24 including a processor, a large capacity memory, a master station internal bus interface, and a diagnostic circuit. Then, it is linked to the wide area communication network interface 12 via the master station internal bus a. A program for realizing the master station function, a control program for each slave station to be connected, and parameters are stored in a memory in the master station computing unit 24.

As shown in FIG. 3, the wide area network interface 12 edits the control data from the keyboard data buffer 27 of the monitor / keyboard 14 connected to the outside, the voice input and the master station arithmetic section 24 via the internal bus a. , A transmission controller 2 that integrates to generate transmission data
8 and audio data, image data or error information, and distributes them to audio output data, monitor image data, and error information to the master station operation unit 24. There is error information on the reception controller 29 and the monitor / keyboard 14. Master station operation unit 24 such as slave station control programs or parameters
The image data generation circuit 30 for converting the data from the display data into the display data and the image data transmitted from the slave station,
Alternatively, the image data switching circuit 31 is used to partially overwrite.

On the other hand, in the slave station device 10, as shown in FIG. 4, first, the slave station basic section 19 stores a μ processor, a control program and parameters, and a memory used as a work and a buffer, an internal bus interface, and a diagnostic circuit. And a DO unit 32a. In addition, the slave station computing unit 32 includes a simulator 22 and a slave station wide area communication network interface 20 via a dedicated line communication interface 26, a plurality of input / output units 33 interfacing with the plant, and a slave station internal bus b. Are connected. Further, the input / output switching device 21 is a DO
The simulator 22 or the plant side is switched by the signal of the section 32a.

Wide area communication network interface 20 for the slave station
As shown in FIG. 5, the audio information input from the slave station reception controller 34 and the microphone 17 which receives the audio data and the ITV control data transmitted from the master station side and distributes them to the speaker 16 and the ITV 23, respectively, IT
The slave station transmission controller 35 edits, integrates and transmits the V image data and the error information detected by the slave station basic unit 19. The ITV control data is used for ITV swing control and the like. The technique of integrating and distributing voice, image, and signals of different digital signals of error information generated by the μ processor for transmission can be realized by utilizing or diverting a known technique (called ISDN, etc.).

With the above configuration, plant information such as display, telemeter, control, etc., as in the conventional case, is communicated via the dedicated line 3. The image information from the ITV 23 and the voice information between the voice input / output devices are transmitted using the digital wide area communication network 11 compatible with multimedia. In the master system 1, based on the plant information from the slave station device 10, automatic control or plant control according to an operator's instruction is executed, and the image information is displayed on the monitor / keyboard 14 and the microphone 17 of the slave station device 10. The collected voice information is output to the speaker 16 of the parent system 1. As a result, the operator of the parent system 1 can visually and audibly check the state of the entire plant and the main engine on the child system 2 side. It is also easy to confirm an accident such as a fire, a disaster, or an abnormal state such as an intruder on the plant premises at the installation location of the child system 2.

Further, the slave station device 10 is equipped with a μ processor, and has a self-diagnosis function such as memory diagnosis and watchdog timer monitoring, and a plant diagnosis function such as reasonable check of telemeter amount and response check to control output. And if there is an error log
It is transmitted to the parent system 1. In this case, the dedicated line 3 is normally used, but even if the dedicated line 3 becomes unavailable due to the diagnostic result such as disconnection of the dedicated line 3 or continuous transmission errors, wide area communication including the error information is performed. It has a switching function for transmitting via the network 11. The parent system 1 notifies the operator by displaying an abnormality of the child system 2 on the monitor / keyboard 14.

Even when H / W remodeling or expansion occurs in the child side system 2, it is effective in monitoring the work state and in communicating with the parent side system 1 such as a link test to proceed with the work. .. In addition, by providing a display for the important sensor, even if the slave station basic unit 19 goes down, if the wide area communication network interface 20 for the slave station is normal, the ITV 23 displays the sensor display, By transmitting to the parent system 1, there is also an advantage that it does not become blind at all.

The dedicated line 3 and the wide area communication network 11 are selectively used within the above range, and even if the dedicated line 3 cannot be used, the plant information is not transmitted via the wide area communication network 11. This is to avoid erroneous data transmission due to interference.

Next, the program and parameter changing function associated with the operation change will be described.

In the parent system 1, the operator monitors /
When the keyboard 14 is operated, the master station computing unit 24 takes in as keyboard data via the keyboard data buffer 27 of the wide area communication network interface 12 and the master station internal bus a. As a result, "change work", "change target (program or parameter)", "target slave station", etc. are recognized. Then, the object held in the database is searched and the image data switching circuit 31 is operated by a command to display it on the monitor. The operator changes the program or parameter displayed on the monitor by key operation. The display of this program is in list format,
You can also use logic charts and functional specifications. Changes at the logic chart and specification description level are handled by the automatic generation function.

After confirming the operator's changes, first,
The master station device 6 instructs the slave station device 10 via the dedicated line 3 with an input / output destination switching command. Upon receiving this command, the slave station device 10 drives the DO unit 32a and switches the input / output switching device 21 to the simulator 22 side.

As shown in FIG. 7, the simulator 22 includes a DI photocoupler 37 and a DI photocoupler 37 in order to insulate the resistance change switch 36 from the DI portion of the slave station device 10 which receives DO.
A buffer 38 is provided. Then, the data is fetched into the slave station calculation unit 32 via the slave station internal bus b and collated and confirmed. In addition, it is transmitted to the master station device 6 and it is confirmed whether or not the behavior of the system is correct.

The DO pattern generator 39 generates a pulse signal, and the pulse signal is taken into the DI of the slave station device 10 via the DO photocoupler 40. This signal is subjected to corresponding data processing such as display data, pulse or measurement data according to the program and parameters. The data obtained here is also transmitted to the master station device 6 for system determination.

The AI section in the simulator 22 receives the AO data output by the slave station device 10. This AI unit includes a switch 41 for switching each constant depending on whether current input or voltage input, a multiplexer 42 with an isolation amplifier, and an A / D
It is composed of a converter 43. Similar to the DI unit, this AI unit takes in the slave station operation unit 32 to perform collation confirmation, and at the same time transmits it to the master station device 6 for system determination.

The D / A converter 44 includes an isolation amplifier 45.
Also, it is output via the voltage / current switching circuit 46 that switches between voltage output and current output, and is fetched from the AI section of the slave station device 10. Data processing as telemeter information is executed by a program and parameters, and transmitted to the master station device 6 for system determination. It should be noted that various changeover switch circuits are provided as described above in order to cope with a difference in voltage value between input and output and a difference in signal type. However, the condition code set in the simulator 22 is set to the internal bus of the slave station device 10. b
The switch controller 48 receives, decodes, latches, and controls each switch circuit.

After this processing is completed, the slave station device 10 transmits a switching completion notification to the master station via the dedicated line 3. Upon receiving this notification, the master station device 6 executes the transmission of the changed program or parameter. At this time, if a parameter that regulates the operation mode of the simulator 22 is required, the parameter is transmitted together. Unless otherwise specified, the default operation mode is set in the slave station device 10.

In this way, it is possible to confirm the change of the program or the parameter. After confirming the changes, use the operator's keys to cancel the simulator use mode. The operator's instruction is confirmed by the master station computing unit 24,
A command for switching input / output from the simulator 22 to the plant side is issued to the slave station device 10 via the dedicated line 3.

As described above, the slave station device 10 is changed due to the operation change.
In some cases, you may want to change the control program and parameters (including the position table) in. The master station device 6 has a control program and parameters of all slave station devices 10 as a database in a large capacity memory. As a result, the operator from the monitor / keyboard 14 is allowed to
0 control programs and parameters can be searched and changed. At this time, it is necessary to confirm the legitimacy of this changing work, and the master station device 6 gives an instruction to switch the input / output of the plant to the simulator 22 to the corresponding slave station device 10 via the dedicated line 3. In the corresponding slave station device 10, the input / output switching device 21
To switch the input / output to the simulator 22 and notify the master station device 6 of the completion of switching. After that, the master station device 6 loads the changed control program and parameters into the slave station device 10 via the dedicated line 3. Simulator 22
The validity of the change will be confirmed and verified by confirming the input / output relations between the stations and the reflection in the transmission data at both stations.
After the confirmation is completed, the master station instructs the slave station to switch the input / output to the plant side.

As described above, in this embodiment, the remote monitoring control system can easily handle the image information and the voice information together with the conventional plant information. Furthermore, in the master station device 6, the program and parameter of the slave station device 10 are changed,
Not only transmission but also confirmation of changes can be performed on an actual machine basis.

[0036]

As described above, according to the present invention, not only the binary information of the plant monitoring device, but also the video information and the audio information of the installation location of each remote station and the state of the environment are added, An advanced remote maintenance function that allows the operator to remotely change the sequence of a slave station installed in a distant place and the environment that makes the operator feel as if he / she were there. Can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a remote monitoring control system showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a master station device of the same device.

FIG. 3 is a configuration diagram showing a wide area communication network interface of the device.

FIG. 4 is a configuration diagram showing a slave station device of the same device.

FIG. 5 is a configuration diagram showing a slave station wide area communication network interface of the apparatus.

FIG. 6 is a configuration diagram showing a simulator of the apparatus.

FIG. 7 is a configuration diagram of a remote monitoring control system showing a conventional example.

[Explanation of symbols]

 1 Parent side system 2 Child side system 3 Dedicated line 6 Master station device 9 Dedicated line switching device 10 Slave station device 11 Wide area communication network 12 Wide area communication network interface 14 Monitor / keyboard 15 Voice input / output device 16 Speaker 17 Microphone 18 Wide area communication network Switching device 19 Slave station basic unit 20 Wide area communication network interface for slave station 22 Simulator 23 ITV

Claims (3)

[Claims] 1. A distant place for exchanging data for monitoring and controlling a plant via a communication means between a master station installed in a central power supply command station and a slave station installed in a substation. In the supervisory control system, the slave station includes a collection unit that collects plant image information and acoustic information, and a voice information output unit that outputs voice information from the master station, while the master station has A means for outputting video and audio information from the slave station, and a voice information input means for inputting voice information to the slave station, and further, as communication means between the two stations, A distant monitoring control system comprising a wide area communication network for communication and a data dedicated line for monitoring and controlling the plant. 2. A means for outputting data for changing processing of a control program and parameters of the slave station from the master station to the slave station via the dedicated line, and means for outputting the data from the plant side to the slave station. Means for outputting a command to switch to simulator means for simulating a plant, means for changing the control program and parameters in the slave station, and means for confirming the change processing by the data obtained by the simulator means 2. The remote monitoring control system according to claim 1, further comprising means for sending the data obtained by the simulator means to the master station via the dedicated line to confirm the validity of the change processing. 3. The slave station is provided with respective diagnostic means for diagnosing a self-diagnosis and a state of a plant, and means for communicating diagnostic information of these respective diagnostic means to the master station via the dedicated line. And a switching means for communicating the diagnostic information to the master station via the wide area communication network when it is detected that the dedicated line is unusable. Supervisory control system.