JPH10307602A - Power system centralized monitor and control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop automatic control immediately according to a judgement made on a controlled place side and to prevent miscontrol by providing a controlled-place side remote monitor and control circuit with an automatic control stopping circuit which stops a controlled-place side automatic control circuit if an in-use automatic processor on a control place gets out of order. SOLUTION: The remote monitor and control unit 3 on the side of the controlled place B normally monitors an in-use system state signal 56a. Then when an in-use system is switched from the system of the automatic processor 1a on the side of the control place A to the system of the automatic processor 1b, an in-use system signal state change detecting circuit 19a outputs an in-use system reset signal 57a from an in-use system signal state change detecting circuit 19a once detecting a reset state change of the in-use system signal 56a. Then an automatic control stop command 58 is outputted to an automatic control circuit 21 which performs feedback control, etc., over a power generator 4. Consequently, the automatic control circuit 21 stops to quit control over the power generator 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized power system monitoring and control system for monitoring a controlled device such as a generator in a power system from a distance and automatically controlling the controlled device.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a block diagram showing a configuration of a conventional power system centralized monitoring and control system based on the configuration of a control device disclosed in Japanese Unexamined Patent Publication. In FIG. 4, on the control center A side, an automatic processing device 1 having a digital output circuit 11 and an automatic processing device failure detecting circuit 15, a selection signal input circuit 12, a ready signal input circuit 13, and an AND gate 14 are provided. The remote monitoring control device 2 and a reset circuit 16 are provided. On the controlled site B side, a remote monitoring control device 3 and a generator 4 as a controlled device are provided. The remote monitoring control device 2 on the control site A side and the remote monitoring control device 3 on the controlled site B side are connected by a transmission line 70.

Next, the operation will be described. In FIG. 4, a selection control signal 51 for selecting a controlled device from the digital output circuit 11 of the automatic processing device 1 on the control center A side.
And the ready signal 52 are input to the selection signal input circuit 12 and the ready signal input circuit 13 of the remote monitoring control device 2 on the control center A side.
The AND gate 14 receiving the output signals of the input circuits 12 and 13 is opened when both the selection control signal 51 and the ready signal 52 are passed, thereby selecting the output from the AND gate 14. Control signal 54
Is transmitted to the remote monitoring control device 3 on the controlled site B side via the transmission line 70, and the generator 4 as the controlled device is controlled. Further, when a failure occurs in the automatic processing device 1 on the control center A side while the selection control signal 54 is being output, the automatic processing device failure detection circuit of the automatic processing device 1 on the control center A side is prevented to prevent erroneous control. When the fault detection unit 15 detects the fault, an automatic processing unit fault alarm signal 53 is passed from the automatic processing unit fault detection circuit 15 to the reset circuit 16, whereby the ready signal 52 is forcibly reset. Therefore, the AND gate 14
Is closed, the selection control signal 51 is reset, and control of the generator 4 is stopped. Such an operation prevents erroneous control when a failure occurs in the automatic processing device 1 on the control center A side.

[0004]

Such a conventional centralized power system monitoring and control system is provided with an automatic control function for controlling a controlled device mainly by an automatic processing device on the control station side.
This control station side automatic processing device sends control signals to the controlled station side remote monitoring control device when necessary. Therefore, the automatic processing device only transmits, for example, a generator target output value to the remote monitoring control device on the controlled site side, and adjusts to the target output value by the remote monitoring control device on the controlled site side. It has come to have a feedback control function for stabilizing the generator output. As described above, when the controlled station independently performs the automatic control, the control center side detects the failure of the control station-side automatic control processing device as in the conventional power system centralized monitoring and control system described above. In the configuration in which the remote monitoring and control device determines a failure and stops the control, the processing load of the remote monitoring and control device on the control station side causes an unstable state from the occurrence of the failure until the automatic control stop command is sent. There is a problem that automatic control is continued by the remote monitoring control device on the controlled site side.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention has been made in the case where a system is switched due to a failure in an automatic control processing device having a dual system configuration in a control station, or a situation in which a control station is connected to a control station. It is an object of the present invention to obtain an electric power system centralized monitoring and control system capable of immediately stopping automatic control according to a judgment of a controlled station when an operation mode is different from that of a control station.

[0006]

According to a first aspect of the present invention, a remote monitoring control device 3 on a controlled station B side constantly monitors an operation mode on a control station A side. When the system used by the automatic processing devices 1a and 1b is switched, the automatic control stop circuit 191 for stopping the automatic control circuit 21 provided in the remote monitoring control device 3 on the controlled site B side is controlled by the controlled site. The remote monitoring control device 3 on the B side is provided.

In the second invention, the remote monitoring control device 3 on the controlled site B constantly monitors the operation mode on the control site A side and uses the automatic processing devices 1a and 1b on the control site A side. When the system is switched, it is determined whether the switching is due to a failure or an operation by an operator. If the switching is due to a failure, the automatic control circuit 21 is stopped. An automatic control stop operation circuit 192 for continuing operation without stopping the circuit 21 is provided in the remote monitoring control device 3 on the controlled site B side.

According to a third aspect of the present invention, the remote monitoring control device 3 on the controlled site B has at least a use mode and a test mode, and the consistency between the mode on the controlled site A and the mode on the controlled site B is provided. Is checked, and if the two modes are different, an automatic control stop circuit 193 for stopping the automatic control circuit 21 is provided in the remote monitoring control device 3 on the controlled place B side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a power system centralized monitoring and control system according to the first embodiment.
In FIG. 1, the power system centralized monitoring and control system according to the first embodiment has a dual system configuration of four modes of use / standby / test / stop.
Processing unit 1 on the control center A side with the operation mode
a, 1b and a remote monitoring and control device 2 at the control center A for remotely monitoring and controlling the controlled site B based on output signals from the automatic processing device 1a or 1b; The remote monitoring and control device 3 on the controlled place B side, which is remotely monitored and controlled by the controller 3, and the generator 4 which is the controlled device on the controlled place B side which is remotely monitored and controlled by the remote monitoring and controlling device 3
And the remote monitoring control device 1 on the control station A side.
a or an automatic adjustment function for maintaining the output value specified by 1b and the generator 4 based on the specified target output value.
A feedback control function for finely adjusting the output value to within the allowable deviation is provided in the remote monitoring control device 3 on the controlled site B side. The automatic processing device 1a having a dual configuration on the control station A side,
1b, an automatic processing device failure detection circuit 15 for detecting a failure of each of the automatic processing devices 1a and 1b, a mode output circuit 17 for outputting a signal indicating an operation mode, an output signal of the automatic processing device failure detection circuit 15, Mode output circuit 17
And an AND gate 18 which takes an AND with the output signal. The remote monitoring control device 3 on the controlled site B side has an automatic control circuit 21 having the above-described automatic adjustment function and feedback control function, and a system (automatic processing device 1a, 1b on the control site A side which is used due to some failure ( An automatic control stop circuit 191 is provided as an automatic control stop means for stopping the automatic control circuit 21 when the (use system) is switched. The automatic control stop circuit 191 includes a use-related signal change detection circuit 19a, 19b and a use-use signal change detection circuit 19a.
And an OR gate 20 for performing an OR operation on the output signal of the detection circuit 19b and the output signal of the in-use signal state change detection circuit 19b. The remote monitoring control device 2 on the control site A side and the remote monitoring control device 3 on the controlled site B side are connected by a transmission line 70. The automatic control circuit 21 gives the selection control signal 54 to the generator 4,
Further, it receives the generator output signal 59 from the generator 4,
It has an automatic adjustment function and a feedback control function.

Next, the operation will be described. For example, in the automatic processing device 1a of the dual system configuration on the control station A side,
Under the condition that the use system signal 55 is output from the mode output circuit 17 and the automatic processing device failure detection circuit 15 does not output the automatic processing device failure alarm signal 53, the remote monitoring control device 2 on the control center A side is used. , The use system status signal 56a is transmitted to the remote monitoring control device 3 on the controlled site B side. On the other hand, the remote monitoring control device 3 on the controlled site B side constantly monitors the use system status signal 56a, and when the use system is switched, the remote use monitoring control device 3 uses the system from the automatic processing device 1a to the automatic processing device 1b due to some failure. In the case where the system is switched, when the reset state change of the use system state signal 56a is detected by the use system signal state change detection circuit 19a, the use system reset signal 57a is output from the use system signal state change detection circuit 19a. An automatic control stop command 58 is output to the automatic control circuit 21 that performs feedback control and the like. As a result, the automatic control circuit 21 stops, and control of the generator 4 is stopped.

As described above, according to the first embodiment, when a failure occurs in the automatic processing device 1a or 1b of the used system on the control center A side, the automatic control circuit 21 on the controlled site B side is immediately stopped. By doing so, erroneous control of the generator 4 can be prevented, and a highly reliable system can be obtained.

Embodiment 2 FIG. In the first embodiment, the automatic control processor 1a or 1
b) When a failure occurs, the automatic control circuit 2 on the controlled site B side
1 was described. However, even if the automatic control processor 1a or 1b on the control center A side is manually switched by the operator instead of a failure, the remote monitoring control on the controlled site B side is also possible. Although the automatic control circuit 21 of the device 3 is stopped, in the second embodiment, the automatic control is performed when the operating system of the automatic processing device 1a or 1b on the control center A side is manually switched by the operator. It is configured so that it can be continued.

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing a configuration of a power system centralized monitoring and control system according to the second embodiment. 2, components corresponding to those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In FIG.
An automatic control stop operation circuit 192 as an automatic control stop operation means provided in the remote monitoring control device 3 on the controlled site B side.
Determines whether this switching is due to a failure or an operation of an operator when the use system of the automatic processing devices 1a and 1b on the control center A side is switched, and if the switching is due to a failure, the automatic control circuit 21 Is stopped, and if the switching is performed by an operator, the operation is continued without stopping the automatic control circuit 21. This automatic control stop operation circuit 19
2 is a signal system signal state change detection circuit 19a, 19b, an output signal of the signal system signal state change detection circuit 19a and the automatic processing device 1
a with the output signal of the automatic processing device failure detection circuit 15
An AND gate 22a for taking D, an AND gate 22b for taking AND of an output signal of the signal-related signal change detection circuit 19b and an output signal of the automatic processing device failure detection circuit 15 of the automatic processing device 1b, and an output of the AND gate 22a Signals and AND
OR gate 20 for ORing with the output signal of gate 22b
And

Next, the operation will be described. For example, in the automatic processing device 1a on the control center A side, the mode output circuit 17
Under the condition that the automatic processing device failure detection circuit 15 does not output the automatic processing device failure alarm signal 53, via the remote monitoring control device 2 on the control center A side,
The use system status signal 56a is sent to the remote monitoring control device 3 on the controlled site B side. On the other hand, the remote monitoring control device 3 on the controlled site B side constantly monitors the use system state signal 56a, and when the use system is switched due to some failure, the use system state change signal detection circuit 19a detects the use system state signal 56a. When a reset state change is detected, a use system reset signal 57a is output from the use system signal state change detection circuit 19a. At the time of this failure, the automatic processing unit failure detection signal 15 is output from the automatic processing unit failure detection circuit 15, so that the AND gate 22
a outputs a signal system switching signal 60 output only at the time of failure, and outputs an automatic control stop command signal 58 through the OR gate 20.
To the automatic control circuit 21. Thereby, the automatic control circuit 21 stops, and the control for the generator 4 is stopped.

On the other hand, if the operating system is switched from the system of the automatic processing device 1a to the system of the automatic processing device 1b by the operation of the operator instead of the failure, the used system signal state change detection circuit 19a outputs the used system state signal 56a. However, since the automatic processing device failure detection signal 15 is not output from the automatic processing device failure detection circuit 15, the use system reset signal 56a is not output from the use system signal state change detection circuit 19a. Therefore, in this case, the automatic control circuit 2
1 is not stopped, and the operation of the generator 4 is continued.

As described above, according to the second embodiment, when a failure occurs in the automatic processing device 1a or 1b of the used system at the control center A, the automatic control circuit 21 at the controlled site B is immediately stopped. By doing so, it is possible to prevent erroneous control of the generator 4, and on the other hand, if the operating system is switched by the operation of the operator, the operation of the generator 4 is continued as it is, so that a more reliable system can be obtained. it can.

Embodiment 3 In the first and second embodiments,
In the second embodiment, the means for preventing the erroneous control in the event of a failure by the automatic processing device on the control center side of the use system has been described.
Now, means for preventing erroneous control during a test will be described.

In the automatic processing apparatus having the dual system configuration on the control station side and the remote monitoring control apparatus on the control station side, one system is set to the used system and the other system is set to the test system. When conducting a test by connecting a device to a test system of a device at the control center, a tester mistakenly connects a device at the controlled site that is not to be tested to a test system of a device at the control center. This causes a problem that test data flows and leads to erroneous control.

Hereinafter, a third embodiment having means for solving the above problem will be described with reference to the drawings. FIG. 3 is a block diagram showing a configuration of a power system centralized monitoring and control system according to the third embodiment. 3, components corresponding to those shown in FIGS. 1 and 2 are given the same reference numerals, and descriptions thereof will be omitted. In FIG. 1, reference numeral 2a denotes an automatic processing device 1a.
Remote monitoring control device on the control center A side connected to the system
Is a remote monitoring control device on the control center B side connected to the system of the automatic processing device 1b. Reference numeral 5 denotes a mode switching switch on the controlled plant B side for manually switching the operation mode. An automatic control stop circuit 193 provided as an automatic control stop means provided in the remote monitoring control device 3 on the controlled site B side includes AND gates 22a and 22b and an OR gate 20;
The mode of the control side and the mode of the controlled place B are checked for consistency. If the two modes are different, the automatic control circuit 21 is stopped.

Next, the operation will be described. For example, the automatic processing device 1a in the dual system configuration on the control center A side uses the system output signal 5 from the mode output circuit 17 when the system is the operating system.
5 is output. This use system signal 55 is transmitted to the remote monitoring control device 3 on the controlled B side via the remote monitoring control device 2a. In the remote monitoring control device 3, when the mode changeover switch 5 is set to the use mode indicating operation, the use signal 63 is output from the mode changeover switch 5, and the use signal 63 is output from the AND gate. Since the automatic control stop command signal 58 is not provided to the control signal 22a, no automatic control stop command signal 58 is generated. Therefore, normal automatic control is performed by the automatic control circuit 21.

However, when the remote monitoring control device 3 on the controlled site B side is set to the test mode, the mode changeover switch 5 outputs the under test signal 62, and the AND gate 22a outputs the in-use signal 55. And the mode difference signal 64a is output from the AND gate 22a. Therefore, the automatic control stop command signal 58 is generated, the automatic control circuit 21 is stopped, and the control on the generator 4 is stopped.

Similarly, when the remote monitoring control device 2a on the control center A side is set to the test mode and the remote monitoring control device 3 on the controlled site B side is set to the use mode,
The mode difference signal 64b is output from the AND gate 22b, and the control on the generator 4 is stopped. Also, as shown in FIG. 3, the transmission line 70 should be connected to the remote monitoring control device 2a, but the transmission line 70 is incorrectly connected to the remote monitoring control device 2b, and the control station A side and the controlled station B side The automatic control circuit 21 also stops when the operation modes are different.

As described above, according to the third embodiment, if the mode of the control place A is different from the mode of the controlled place B,
Since the automatic control circuit 21 on the controlled site B side is stopped, it is possible to prevent erroneous control due to human error such as a wrong line connection at the time of the test.

[0024]

As described above, according to the first aspect of the present invention, when a failure occurs in the automatic processing device of the use system on the control center side,
Since the automatic control circuit on the controlled site is immediately stopped, erroneous control of the controlled device can be prevented, and the effect of improving reliability can be obtained.

According to the second aspect of the present invention, when a failure occurs in the automatic processing device of the use system on the control station side, the automatic control circuit on the controlled station side is immediately stopped to prevent erroneous control. Since the automatic control is continued as it is when the use system is switched by the operation described above, the effect of further improving the reliability is obtained.

According to the third aspect of the present invention, if the mode on the control station side is different from the mode on the controlled station side, the automatic control circuit on the controlled station side is stopped. Erroneous control due to human error such as
The effect that reliability is improved is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a power system centralized monitoring and control system according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of a power system centralized monitoring and control system according to Embodiment 2 of the present invention.

FIG. 3 is a block diagram showing a configuration of a power system centralized monitoring and control system according to Embodiment 3 of the present invention.

FIG. 4 is a block diagram showing a configuration of a conventional power system centralized monitoring and control system.

[Explanation of symbols]

1, 1a, 1b automatic processing device, 2 remote monitoring control device at control station side, 3 remote monitoring control device at controlled site side, 4
Generator (controlled equipment), 5 mode switch, 11
Digital output circuit, 12 selection signal input circuit, 13
Ready signal input circuit, 14, 18, 22a, 22b
AND gate, 15 Automatic processor failure detection circuit, 16
Reset circuit, 17 mode output circuit, 19a, 19
b Signal change detection circuit used, 20 OR gate, 21
Automatic control circuit, 51, 54 selection control signal, 52 ready signal, 53 automatic processing device failure alarm signal, 55 use system signal, 56a, 56b use system state signal, 57a,
57b Use system reset signal, 58 Automatic control stop command signal, 59 Generator output signal, 60a, 60b Use system switching signal, 61 Test system signal, 62 Under test signal, 63
Busy signal, 64a, 64b mode difference signal, 70
Transmission line, 191, 193 Automatic control stop circuit (automatic control stop means), 192 Automatic control stop operation circuit (automatic control stop operation means).

Claims (3)

[Claims] An automatic processing device at a control station having at least four operation modes of use / standby / test / stop in a dual system configuration, and a controlled station located at a distance based on an output signal from the automatic processing device. A remote monitoring and control device on the control station side for monitoring and controlling; a remote monitoring and control device on the controlled station side that is remotely monitored and controlled by the remote monitoring and control device on the control station side; and a remote monitoring and control device that is remotely monitored and controlled by the remote monitoring and control device. A controlled device on the control station side, an automatic adjustment function for keeping the target output value specified by the remote monitoring control device on the control station side, and a control device for the controlled device based on the specified target output value. In a power system centralized monitoring and control system provided with an automatic control circuit having a feedback control function of finely adjusting an output value within an allowable deviation in the remote monitoring control device on the controlled site side,
The remote monitoring control device on the controlled station side constantly monitors the operation mode on the control station side, and when the system used by the automatic processing device on the controlled station is switched due to any failure, the controlled A centralized monitoring and control system for a power system, characterized in that an automatic control stopping means for stopping the automatic control circuit provided in the remote monitoring control device on the site side is provided in the remote monitoring control device on the controlled site side. 2. An automatic processing device on the control station side having at least four operation modes of use / standby / test / stop in a dual system configuration, and a controlled station located at a distance based on an output signal from the automatic processing device. A remote monitoring and control device on the control station side for monitoring and controlling; a remote monitoring and control device on the controlled station side that is remotely monitored and controlled by the remote monitoring and control device on the control station side; and a remote monitoring and control device that is remotely monitored and controlled by the remote monitoring and control device. A controlled device on the control station side, an automatic adjustment function for keeping the target output value specified by the remote monitoring control device on the control station side, and a control device for the controlled device based on the specified target output value. In a power system centralized monitoring and control system provided with an automatic control circuit having a feedback control function of finely adjusting an output value within an allowable deviation in the remote monitoring control device on the controlled site side,
The remote monitoring control device on the controlled place side constantly monitors the operation mode on the control place side, and when the system used by the automatic processing device on the control place side is switched, whether this switching is due to a failure, Judge whether it is due to the operation of the operator,
If the switching is due to a failure, the automatic control circuit is stopped, and if the switching is performed by an operator, the automatic control stop operation means for continuing the operation without stopping the automatic control circuit is a remote monitoring control on the controlled site side. A centralized power system monitoring and control system, which is provided in a device. 3. An automatic processing device on the control station side having at least four operation modes of use / standby / test / stop in a dual system configuration, and a controlled place located at a distance based on an output signal from the automatic processing device. A remote monitoring and control device on the control station side for monitoring and controlling; a remote monitoring and control device on the controlled station side that is remotely monitored and controlled by the remote monitoring and control device on the control station side; and a remote monitoring and control device that is remotely monitored and controlled by the remote monitoring and control device. A controlled device on the control station side, an automatic adjustment function for keeping the target output value specified by the remote monitoring control device on the control station side, and a control device for the controlled device based on the specified target output value. In a power system centralized monitoring and control system provided with an automatic control circuit having a feedback control function of finely adjusting an output value within an allowable deviation in the remote monitoring control device on the controlled site side,
The remote monitoring and control device on the controlled station side has two or more types of modes corresponding to the operation modes on the control station side, and checks the consistency between the mode on the controlled station side and the mode on the controlled station side. If the two modes are different, an automatic control stop means for stopping the automatic control circuit is provided in the remote monitoring control device on the controlled site side.