JPS5810297A - Remote monitoring controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a book relating to a control output circuit for a telemeter-sharing type cyclic remote monitoring and control device (hereinafter referred to as a remote control device) installed in a controlled station.

FIG. 1 shows a block diagram of the remote control device. The control command is passed from the supervisory control device 1 to the controlled device 5 through the control center remote control device 2, the transmission line 3, and the controlled center remote control device 4, and control is executed. In addition, display and telemeter signals are output from the controlled equipment 5 as appropriate depending on the state of the controlled equipment at that time, and are sent to the monitoring and control equipment 1 through the controlled station remote control device 4, the transmission line 3, and the control center remote control device 2. handed over and monitored.

Next, FIGS. 2 and 3 show configuration diagrams of the controlled station remote control device 4.

First, the flow of control commands will be explained.

The carrier wave transmitted from the control station remote control device 2 through the transmission line 3a is input to the signal transmission device 6, where it is converted into a serial information signal. This serial information signal is input to a reception code converter 7, where it is converted into a parallel information signal and then passed to a decoding circuit 8. The decoding circuit 8 decodes the parallel information signal, determines to which controlled device among the plurality of controlled devices the control output is to be performed, and gives an instruction to the control output circuit 9. The control output circuit 9 sends control output signals 10a to 10a to the controlled device instructed by the decoding circuit 8.
1011 is output and control is executed.

Next, the flow of display and telemeter signals will be explained.

Display signals 11a-lln passed from controlled devices are input to display input circuits 12a-12H. The display input circuit performs electrical disconnection, and its output is input to the scanner 13. Premeter signals 14a to 14n are input to telemeter input circuits 1.5a to 15n.

The telemeter input circuit performs level conversion, etc., and its output is input to the scanner 13. The input circuit (display input circuit pre-meter input circuit) is sequentially scanned at a fixed time determined by the transmission speed of the scanner 1316, signal transmission device 17. Therefore, one input circuit has its output scanned once every fixed time t. transmission speed, input circuit 15a = 15n,
It is determined by the numbers 12a to 12n. That is, a telemeter signal input manually to one telemeter input circuit is sent to the control center at regular intervals.

Next, the parallel data signals passed from the scanners 1:3 are converted into serial data signals by the transmission code converter 17, and then passed to the signal transmission device 16. This serial data signal is transmitted to the signal transmission device 1
6, the signal is modulated into a carrier wave and transmitted to the control station remote control device F via a transmission line 31).

In a remote control device, the following is an operational method in which the measured value of the telemeter is read at the control center, the measurement result is judged, and if it is within a certain range, the related control command is sent to the controlled center remote control device. resulting in disadvantages.

The telemeter value input to the controlled station remote control device is cyclically sent to the control station remote control device and measured by the telemeter indicator. However, due to the characteristics of the cyclic system, the telemeter value is sent once per cycle.

In this case, although changes in telemeter values are continuous over time, the telemeter instruction value at the control center that indicates the change is updated only in cyclic time. In other words, there is a possibility that the telemeter indication value on the control center side is a past value that is delayed by one cycle time. In a device that can be controlled with the control condition that the telemeter value is within a predetermined range, the above control condition must be satisfied at the time of control.

If the telemeter value measured at the control center now satisfies the control conditions, a control command will be sent to the controlled station remote control device, but at this time, the telemeter value that was being instructed will be delayed by one cycle. It is assumed that the premeter value deviated from the control condition after that. Since the change when is sent to the control center after one cycle of time, by the time the control command is received by the remote control device of the branch control center, the telemeter value has already deviated from the control condition, so the control condition remains unsatisfied. This means that control has been performed, resulting in erroneous control.

The present invention aims to eliminate such drawbacks by adding a circuit to the controlled station remote control device to detect the telemeter value and determine whether the control conditions are satisfied. The present invention provides a remote control device for a controlled station that has the function of locking the control output.

FIG. 3 shows an example of the configuration of a remote control device for a controlled place according to the present invention. In this figure, all the configurations except for the control condition determination circuit 19 are the same as those of the conventional controlled station remote control device. The control signal sent from the control station remote control device is received by the signal transmission device 6 and passed to the decoding circuit 8 by the reception code converter 7. The decoding circuit 8 reads M of the controlled device and instructs the control output circuit 9 as to the controlled device. control +14
The power circuit 9 outputs control output signals 10a to Ion to the designated controlled devices.

On the other hand, the premeter values 1.4a to 14n are input to the telemeter input circuits 15a to 15n and are passed to the scanner ]3 and the control condition determination circuit 19. The display signals 11a to tin are input to display input circuits 12a to 12n and passed to the scanner 13. The scanner 13 cyclically scans the input circuit,
passing the output signal from the input circuit to the transmission code converter 17;
The signal is sent to the control center using the signal transmission device 1ffi16. Scanner 1
3 reads the signal in one cycle time, so the previous value is held in the control station for one cycle time.

When a certain telemeter value among the telemeters that is necessary for determining the control condition is input to the control condition determination circuit 19, if the telemeter value does not satisfy the control condition, a control lock signal is generated to lock the control output. 20 is output to the control output circuit 9.

Since the control condition determination circuit 19 constantly determines the control conditions, even if the telemeter value changes over time as described above and a control command is received even though it deviates from the control conditions, the control condition determination circuit 19 will not be able to determine the control conditions. A control locking signal 20 caused by a deviation from the control condition in the circuit 19 is passed to the control output circuit 9 earlier than the control command and locks the control output, so that the controlled device is not controlled.

When connecting power transmission lines of different systems using a circuit breaker controlled by a remote control device, the circuit breaker is turned on at the moment when the voltage phase difference of the other side is measured and the phase becomes the same. It is effective for The voltage phase difference between different systems is constantly changing, and the control center cannot detect the change due to the transmission delay time of the remote control device, so even though the phase difference is larger, [7 By communicating different systems by issuing a command to turn on a disconnector or disconnecting circuit, if a step-out phenomenon occurs, it could cause serious damage to the power equipment.

Therefore, by using the present invention, the above-mentioned erroneous control can be prevented.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the configuration of a conventional remote monitoring and control system, and Fig. 2 shows details of the 11th Hawari Gosho device 1...Monitoring control device 2...Control station remote control device 3...
・Transmission line 4...Controlled station remote control device 5
... Controlled equipment 6 ... Signal transmission device 7 ... Reception code converter 8 ... Decoding circuit 9 ... Control output circuit 13 ... Scanner 17
...Transmission code converter 19...Control condition judgment circuit (7317) Agent Patent attorney Noriyuki Chika (
(1 person watching) -59:

Claims (1)

[Claims] In remote monitoring and control equipment that determines sending conditions for related control commands based on telemeter measurements, the control condition determination circuit that locks the control output even if a control command is sent by mistake when the conditions are not met is controlled. A remote monitoring and control device is characterized in that it prevents erroneous control by being added to a remote monitoring and control device.