JPH0439247B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a supervisory control device for remotely monitoring and controlling a power plant or a substation, for example.

[Prior art]

In recent years, systems have been used to remotely monitor and control power plants and substations from a general control center, for example. In such a system, operators can be centrally located in a central control center, and many advantages can be obtained, such as increased operational efficiency and maintenance of reliability for emergency operations.

By the way, in the above-mentioned system, if a failure occurs in the control device of the general control center or the line connecting the general control center and the controlled object (i.e., power plant, substation), the supervisory control operation becomes impossible. The reliability of the entire system may be significantly reduced. For this reason, there is a method in which a backup control center having the same functions as the general control center is provided, and a backup line is further provided to connect the backup control center and the controlled objects.

[Problem that the invention seeks to solve]

If the control system is equipped with a backup control center and backup line as described above, even if a failure occurs in the general control center, it will be possible to monitor and control the controlled objects via another route, increasing system reliability. can improve sex. However, in such a system, even if a failure occurs only in the line connecting the controlled object and the general control center, the supervisory control function of the general control center becomes impossible. Further, if a failure occurs in the backup line connecting the backup control center and the controlled object, the monitoring and control function by the backup control center becomes impossible. Therefore, simply providing a backup control center and a backup line has the disadvantage that the efficiency of system monitoring and control operations decreases.

An object of the present invention is to maintain the supervisory control function even if a failure occurs only in the line connecting each control center and the controlled object in a system that performs supervisory control using a main control center and a backup control center. It is an object of the present invention to provide a supervisory control device that can improve the reliability of the system and the efficiency of supervisory control operations.

[Means and actions for solving problems]

In the present invention, the main monitoring control means (general control center 1
0) is the first transfer line means (A route line 32
Through a), a control signal is transmitted to the controlled object (electrical station 12), and a supervisory control operation is performed by receiving a supervisory signal. On the other hand, the preliminary supervisory control means (management center 11) has the same supervisory control function as the main supervisory control means, and communicates the controlled object through the second transfer line means (B route line 32B).
Monitoring and control operations are performed by transmitting control signals to and receiving monitoring signals. The preliminary monitoring control means includes channel switch circuits 27a to 27.
c, 28a to 28c, and when a failure occurs in the control signal transmission operation or the supervisory signal reception operation in the main supervisory control means, the control signal is transmitted or the supervisory signal is received through the channel switch circuit.

The main supervisory control means and the backup supervisory control means are connected by a common transfer line means 32c, and each
Control signals and monitoring signals can be transmitted and received through the transfer line means. Thereby, for example, when a failure occurs in the first transfer line means, the main supervisory control means can transmit and receive control signals and supervisory signals through the common transfer line means and the second transfer line means. If a failure occurs in the second transfer line means, the standby supervisory control means can transmit and receive control signals and supervisory signals through the common transfer line means and the first transfer line means.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a supervisory control system according to an embodiment. In FIG. 1, for example, the supervisory control system is located at a general control center (main control center) for a controlled object, which is an electric plant 12.
10, and a management center 11 which is a backup control center. The general control center 10 provides control signals and monitoring for a remote control device 13a and a remote monitoring device (supervision) 14a corresponding to the first channel CH1, and a remote control device 13b and a remote monitoring device 14b corresponding to the second channel CH2. Equipped with a circuit for transferring signals. That is, the general control center 10 includes transformers (hybrid transformers) 15a to 15f, a filter for the first channel CH1 (CH1' for monitoring) BPF 16
a to 16c, second channel CH2 filter (CH2' for monitoring) BPF17a to 17c, line switch circuits 18a, 18b, channel switch 19
a, 19b, 20a, 20b, and relay circuits 21, 22 for controlling each channel switch.

On the other hand, the management center 11 has a remote control device 13 corresponding to the first channel CH1 similar to the general control center 10.
c, remote monitoring device 14c and second channel CH2
A remote control device 13d and a remote monitoring device 1 corresponding to
It is equipped with a circuit for transferring each control signal and monitoring signal of 4d. That is, also in the management office 11, the transformers 23a to 23d, the first channel CH1
filters (CH1' for monitoring) 24a to 24c,
Filter for second channel CH2 (monitoring is for CH2)
2') 25a to 25c, line switch circuit 26a,
26b, channel switches 27a to 27c and 2
8a to 28c and relay circuits 29 and 30 for controlling each channel switch are installed.

Control signals or monitoring signals are transferred between the general control center 10 and the electric station 12 through the carrier end station devices 31a, 31e and the transfer line (hereinafter referred to as the A route line) 32a. Furthermore, control signals or monitoring signals are transferred between the management center 11 and the electrical station 12 through the carrier end station devices 31b and 31f and the transfer line (hereinafter referred to as the B route line) 32b.
The electric station 12 includes transformers 33a to 33d, filters 34a and 34b for the first channel CH1, filters 35a and 35b for the second channel CH2, and line switch circuits 36a and 36b. Electrical station 1
2 is a remote control device 37a, a remote monitoring device 38a, and a second channel corresponding to the first channel CH1 of the electric station.
a remote control device 37b corresponding to channel CH2;
Each of the remote monitoring devices 38b and the general control center 10
Alternatively, it relays the transfer of control signals and monitoring signals to and from the management center 11.

Control signals and monitoring signals are transferred between the general control center 10 and the management center 11 via the carrier terminal devices 31c, 31d and the common transfer line 32c. That is, the control signal and the monitoring signal are transferred between the general control center 10 and the electric station 12 through the B route line 32b and the common transfer line 32c. Further, the control signal and the monitoring signal are transferred between the management center 11 and the electric station 12 through the A route line 32a and the common transfer line 32c.

Here, the line switch circuit 18 shown in FIG.
a, 18b, 26a, 26b, 36a, 36b
are each constructed from a circuit as shown in FIG. 2, for example. That is, this circuit consists of a signal level detection circuit 40 and a changeover switch circuit 41.
The signal level detection circuit 40 includes a comparator 42,
43, inverter circuits 44 and 45, AND circuits 46 and 47, a flip-flop circuit 48, and a driver 49. Comparator 42, 4
3 compares the input signals V _a and V _b with the reference level signal V _r , respectively, and outputs an "H" level signal when the input signals V _a and V _b are at a higher level. Here, the input signals V _a and V _b are the changeover switch circuit 41
It is supplied to the B contact terminal 50 and the A contact terminal 51 of.

Now, if each of the input signals V _a and V _b are both at a higher level than the reference level signal V _r , the comparators 42 and 43 will both output "H" level signals, and the outputs of the inverters 44 and 45 will be Both are at the "L" level. Therefore, the AND circuit 46,
The output of the flip-flop circuit 47 is also at the "L" level, and the flip-flop circuit 48 continues in its previous state. (In the figure, when the Q output is at the "L" level, the driver circuit does not operate, and the changeover switch circuit does not operate.) An input signal V _a is output from the changeover switch circuit 41. At this time, if only the input signal V _b becomes lower than the reference level signal V _r , the output of the comparator 42 becomes "L" level, the output of the inverter 44 becomes "H" level, and the output of the AND circuit 47 becomes "L" level. The output becomes "H" level, but the flip-flop 48 is in the reset state and the Q output continues to be "L" level.
The changeover switch circuit 41 also remains inactive. Next, when only the input signal V _a becomes lower than the reference level V _r , the output of the comparator 43 becomes "L" level, the output of the inverter 45 becomes "H" level, and the output of the AND circuit 46 also becomes "H" level. As a result, the flip-flop 48 enters the set state and the Q output becomes "H" level.
Therefore, the driver 49 drives the changeover switch circuit 41, so that the input signal _Vb is output from the changeover switch circuit 41 instead of the input signal _Va . That is, the line switch circuit selects one of the input lines that transfers a signal at a normal level, and operates so as to always output a signal at a normal level (i.e., a control signal and a monitoring signal). Become. When the changeover switch circuit is in an operating state and only the input signal V _b becomes lower than the reference level V _r , the Q output of the flip-flop 48 goes to the "L" level as described above, the driver 49 is restored, and the changeover switch circuit 41 is also restored and input signal
V _a is output from the changeover switch circuit 41.

In the supervisory control system configured as described above, the operation of this embodiment will be explained. First, in the general control center 10, a control signal output from the remote control device 13a of the first channel CH1 is transmitted to the transformer 1.
5a, channel switch 19a, and transformer 15
e to the carrier terminal device 31d. Further, the control signal output from the remote control device 13a is transferred to the carrier terminal device 31a through the transformer 15a, the channel switch 19b, and the transformer 15d. Similarly, the control signal output from the remote control device 13b of the second channel CH2 is transmitted to the transformer 15b, the channel switch 20a, and the transformer 1
5e to the carrier terminal device 31d.
Further, the control signal output from the remote control device 13b is transferred to the carrier terminal device 31a through the transformer 15b, the channel switch 20b, and the transformer 15d. Each control signal transferred to the carrier terminal device 31a is transferred to the electrical station 12 via the A route line 32a and the carrier terminal device 31e. In the electric station 12, the control signal output from the carrier terminal equipment 31e is transferred by filters 34b and 35b so that the signal of the first channel CH1 is transferred to the line switch circuit 36a, and the signal of the second channel CH2 is transferred to the line switch circuit 36b. be transferred.

On the other hand, each control signal transferred to the carrier terminal device 31d is transferred to the common transfer line 32c and the carrier terminal device 3.
1c to the management center 11. Management office 1
1, the control signal for the first channel CH1 among the control signals output from the carrier terminal device 31c is:
The signal is transferred to the carrier terminal equipment 31b through the filter 24c, channel switch 27c, and transformer 23c. Similarly, the control signal of the second channel CH2 is transmitted to the filter 25c, the channel switch 28c,
and is transferred to the carrier terminal device 31b via the transformer 23c. Each control signal transferred to the carrier terminal device 31b is transferred to the electrical station 12 via the B route line 32b and the carrier terminal device 31f. In the electric station 12, the control signal output from the carrier terminal device 31f is passed through the filters 34a and 35a to the first
The signal of channel CH1 is sent to the line switch circuit 36a.
The signal of the second channel CH2 is also transferred to the line switch circuit 36b.

The line switch circuit 36a of the electric station 12 detects the level of each control signal of the first channel CH1, and selects and outputs a control signal at a normal level (usually a control signal via the A route line 32a). The control signal output from the line switch circuit 36a is transmitted to the remote control device 37a of the first channel CH1 on the electric station side through the transformers 33c and 33a.
will be forwarded to. Similarly, the line switch circuit 36b of the relay station 12 detects the level of each control signal of the second channel CH2, and selects and outputs the control signal at the normal level (normally the control signal via the A route line 32a). be done. The control signal output from the line switch circuit 36b is transmitted to the transformer 33
c, the second channel on the electric station side through 33a
It is transferred to the remote control device 37b of CH2.

Now, suppose that a failure occurs in the A route line 32a, making it impossible to transfer each control signal via this route. In this case, as described above, each control signal for each channel from the general control center 10 is transferred to the electric station 12 through the common transfer line 32c, the management center 11, and the B route line 32b. Therefore, even if a failure occurs in the A route line 32a, the general control center 10
This ensures that control signals from the

Next, the remote control device 13 of one of the first channel CH1 or the second channel CH2 of the general control center 10
Suppose that a failure occurs in either a or 13b and one of the control signals is not output from the general control center 10. In this case, each remote control device 13c of the management center 11,
From 13d, the preliminary control signal of the first channel CH1 or the second channel CH2 is transferred to the electric station 12. That is, for example, when a failure occurs in the remote control device 13a of the first channel CH1, the relay circuit 21 and the relay circuit 29 operate in the general control center 10 and the management center 11, and the channel switches 19a, 19b and the channel switches 27a to 27c of the management center 11 respectively switch. At the management center 11, the control signal from the remote control device 13c of the first channel CH1 is transmitted to the transformer 2.
3a, channel switch 27c and transformer 23c
The data is transferred to the carrier terminal device 31b through the carrier terminal device 31b. Further, the control signal of the first channel CH1 is transmitted to the transformer 2
3a, channel switch 27a and transformer 23d
The data is transferred to the carrier terminal device 31c via the carrier terminal device 31c. The control signal output to the carrier terminal device 31b is transferred to the electrical station 12 via the B route line 32b and the carrier terminal device 31f. On the other hand, the carrier terminal device 31
The control signal output to c is the common transfer line 32c.
and the general control center 10 through the carrier terminal device 31d.
will be forwarded to. In the general control center 10, the control signal of the first channel CH1 output from the carrier terminal device 31d is passed through the filter 16a and the channel switch 1.
9b, and the carrier terminal equipment 3 through the transformer 15d.
Transferred to 1a. The control signal transferred to the carrier terminal device 31a is transferred to the electrical station 12 via the A route line 32a and the carrier terminal device 31e.
At the electric station 12, the same operation as when each control signal is transferred only from the general control center 10 as described above is executed, and the first channel from the control center 11 is transferred.
The control signal of CH1 is the remote control device 3 to be controlled.
7a. In addition, the remote control device 13b of the second channel CH2 of the general control center 10
If a failure occurs in the relay circuit 22 and relay circuit 30 in the general control center 10 and management center 11,
is operated, and the channel switches 20a and 20b of the general control center 10 and the channel switches 28a to 28c of the management center 11 are respectively switched. As a result, the remote control device 13 of the second channel CH2
The control signal from d is transferred to carrier terminal equipment 31b through transformer 23b, channel switch 28c, and transformer 23c. Also, the second channel
The control signal of CH2 is transferred to the carrier terminal device 31c through the transformer 23b, the channel switch 28a, and the transformer 23d. The control signal output to the carrier terminal device 31b is transferred to the electrical station 12 via the B route line 32b and the carrier terminal device 31f. On the other hand, the control signal output to the carrier terminal device 31c is transmitted to the common transfer line 32c and the carrier terminal device 3.
1d to the general control center 10. Therefore, similarly to the above, the control signal of the second channel CH2 from the management center 11 is transmitted to the remote control device 3 of the electric power station side.
7b.

For this reason, the remote control device 13 of the general control center 10
Even if a failure occurs in a or 13b and the control signal is not output from the general control center 10, the control center 1
The control signals of the corresponding channels from 1 to 12 are transmitted to the electrical station 12.
It will definitely be transferred to. At this time, even if a failure occurs in the B route line 32b, the control signal from the management center 11 is transmitted to the general control center 10 and the A
It will be transferred to the electrical station 12 via the route line 32a. Therefore, the A route line 32a
Or, even if a failure occurs in one of the B route lines 32b or if a failure occurs in the general control center 10 and one of the control signals is not output, each control signal is reliably transferred to the controlled object. I can do it.

Next, for the transfer of control signals as described above,
The transfer of monitoring signals to electrical stations will be briefly explained. Each remote monitoring device 38a of the first channel CH1' and the second channel CH2' on the electric station side,
Each monitoring signal output from transformer 33b
Carrier terminal equipment 31e, 31f through b, 33d
Output to. Each monitoring signal output to the carrier terminal device 31e is transferred to the general control center 10 via the A route line 32a and the carrier terminal device 31a. In the general control center 10, the first channel CH1'
The monitoring signal is transferred to the remote monitoring device 14a through the filter 16c, transformer 15c, and line switch circuit 18a. Also, the second channel CH
The monitoring signal 2' is transmitted through the filter 17c and the transformer 15.
f and the line switch circuit 18b to the remote monitoring device 14b.

On the other hand, each monitoring signal output to the carrier terminal device 31f is transmitted to the B route line 32b and the carrier terminal device 3
1b to the management center 11. Management office 1
1, the monitoring signal of the first channel CH1' is transferred to the carrier terminal equipment 31c through the filter 24a, the channel switch 27a, and the transformer 23d. In addition, the monitoring signal of the second channel CH2' is
The signal is transferred to the carrier terminal equipment 31c via the filter 25a, channel switch 28a and transformer 23d. Each monitoring signal output to the carrier terminal device 31c is transmitted through the common transfer line 32c and the carrier terminal device 31.
d to the general control center 10. In the general control center 10, the monitoring signal of the first channel CH1' from the carrier terminal device 31d is transferred to the line switch circuit 18a through the filter 16b. In addition, the monitoring signal of the second channel CH2' is
Line switch circuit 18b through filter 17b
has been transferred to.

Assume now that a failure occurs in the A route line 32a and each monitoring signal from the electric station is not transferred to the general control center 10. In this case, each monitoring signal is transferred to the general control center 10 via the B route line 32b and the management center 11 as described above. In the general control center 10, the line switch circuit 18
A detects an abnormality in the monitoring signal from the A route line 32a and performs a switching operation, and the monitoring signal of the first channel CH1' output from the filter 16b is transferred from the line switch circuit 18a to the remote monitoring device 14a. Similarly, the line switch circuit 18a switches, and the monitoring signal of the second channel CH2' output from the filter 17b is switched to the line switch circuit 1.
8b to the remote monitoring device 14b. Therefore, even if a failure occurs in the A route line 32a, each monitoring signal from the electrical station will be reliably transferred to the general control center 10.

Further, the remote monitoring device 14a of the general control center 10,
14b, and the monitoring signal of one channel from the electric station cannot be received, the remote monitoring device 14c of the control center 11, 14d will be used. In this case, the relay circuit 21 or 22 and the relay circuit 29 or 30 operate in the same manner as described above, and the channel switches 19a, 19b or 20a, 20b of the general control center 10 and the management center 11, and the channel switch 27a
-27c or 28a-28c respectively switch. As a result, the monitoring signal transferred through the B route line 32b is supplied to one of the remote monitoring devices 14c and 14d of the management center 11. Also,
The monitoring signal transferred through the A route line 32a is transferred to the management center 11 via the general control center 10, the carrier terminal device 31d, the common transfer line 32c, and the carrier terminal device 31c.

For this reason, the remote monitoring device 14 of the general control center 10
Even if a failure occurs in one of the electrical stations 14a and 14b, the monitoring signal from the electric station will be reliably received and monitored by the remote monitoring device 14c or 14d of the corresponding channel of the management station 11. At this time, even if a failure occurs in the B route line 32b, the monitoring signal transferred through the A route line 32a will be transmitted to the remote monitoring device 14c or 1 of the management center 11.
4d.

〔Effect of the invention〕

As described in detail above, according to the present invention, in a system in which supervisory control is performed by a main control center and a backup control center, control signals and supervisory signals are transmitted through the common line 32c connecting the main control center 10 and the backup control center 11. can be sent and received using two line routes.
Therefore, even if a failure occurs in the main line (A route line 32a) connecting the main control center and the controlled object 12, the main control center can perform monitoring and control operations using the common line. can. In addition, a backup line (B
Even if a failure occurs in the root line 32b), the standby control center can perform monitoring and control operations using the common line.

As a result, when a failure occurs in the main control center, the backup control center can perform a monitoring control function, thereby improving the reliability of the system. In addition, even if a line failure occurs, the main control center or standby control center maintains the monitoring and control functions.
It is possible to prevent a situation in which the supervisory control function is disabled. Therefore, as a result, it becomes possible to improve the reliability of the system and the efficiency of the monitoring control operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a supervisory control system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a specific configuration of a line switch circuit according to the same embodiment. 13a to 13d, 37a, 37b... Remote control device, 14a to 14d, 38a, 38b... Remote monitoring device, 18a, 18b, 26a, 26b, 2
6a, 36b... line switch circuit, 32a...
A route line, 32b... B route line, 32c
...Common transfer line.

Claims (1)

[Scope of Claims] 1. A main supervisory control means that performs a supervisory control operation by transmitting a control signal to a controlled object and receiving a supervisory signal from the controlled object; having a similar supervisory control function and transmitting the control signal or receiving the supervisory signal when a failure occurs in the control signal transmitting operation or the supervisory signal receiving operation in the main supervisory control means; preliminary monitoring control means having a channel switch circuit; first transfer line means for connecting the main monitoring control means and the controlled object to transmit and receive the control signal and the monitoring signal; a second transfer line means for connecting the control means and the controlled object and for transmitting and receiving the control signal and the supervisory signal; and a second transfer line means for connecting the main supervisory control means and the preliminary supervisory control means, respectively. A supervisory control device comprising common transfer line means for mutually transmitting and receiving the control signal and the monitoring signal through the first transfer line means or the second transfer line means of the other party.