Remote monitoring and control device

Abstract

To solve the problem that it is difficult to test, without operating an on-site apparatus, whether or not contacts of a selection relay and a control relay in a two-behavior system of selection-control are correctly closed in accordance with a command transmitted from a control station.SOLUTION: A remote monitoring control device comprises a signal generation section by which, in a case where a remote-direct changeover switch is changed over to a remote side in a plurality of switch groups including at least the remote-direct changeover switch, an operation-test changeover switch and a normal-simulation remote changeover switch, a signal for validating a command from a control station is generated and in a case where the remote-direct changeover switch is changed over to a direct side, when the operation-test changeover switch is changed over to a test side and the normal-simulation remote changeover switch is changed over to a simulation remote side, the signal for validating the command from the control station is generated but in the other cases, a signal for invalidating the command from the control station is generated.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a remote monitoring and control device, a remote monitoring and control method, and a program.

Background Art

[0002] Conventionally, in a substation or the like, a remote monitoring and control device for remotely monitoring and controlling devices (such as circuit breakers) installed on site has been installed. Since such a remote monitoring and control device requires high reliability over a long period of time, its soundness is maintained by regular tests even after it is installed on site (Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the test of the remote monitoring and control device, it is necessary to confirm whether the contacts of the selection relay and the control relay in the selection-control two-behavior mode correctly close in response to a command from the control station. Such a test is preferably carried out without operating the devices installed on site (field devices). The reason is that among the field devices, there are devices such as circuit breakers provided on the power transmission line, and operating them may lead to large damages such as large-scale power outages.

[0005] However, in a conventional remote monitoring and control device, when the remote-direct changeover switch is switched to the remote side, although the opening and closing control of the contacts of the selection relay and the control relay can be performed according to a command transmitted from the control station, the field devices operate. On the other hand, when the remote-direct changeover switch is switched to the direct side, the field devices do not operate by remote monitoring and control. However, originally, the opening and closing of the contacts of the selection relay and the control relay could not be controlled according to a command from the control station. Therefore, it has been difficult to test whether the contacts of the selection relay and the control relay in the selection-control two-behavior mode close correctly according to a command transmitted from the control station without operating the field devices.

[0006] An object of the present invention is to provide a remote monitoring and control device that solves the above-described problems.

Means for Solving the Problems

[0007] A remote monitoring and control device according to an aspect of the present invention is installed in a controlled station, and uses a plurality of selection relays respectively corresponding to a plurality of devices and a control relay for controlling the device selected by the operation of the selection relay, and selects and controls the device based on a command transmitted from a control station, and is a remote monitoring and control device, Among a plurality of switch groups including at least a remote-direct changeover switch, an operation-test changeover switch, and a normal-simulated remote changeover switch, when the remote-direct changeover switch is switched to the remote side, a signal for validating the command from the control station is generated, and when it is switched to the direct side, when the operation-test changeover switch is switched to the test side and the normal-simulated remote changeover switch is switched to the simulated remote side, a signal for validating the command from the control station is generated, but otherwise, a signal for invalidating the command from the control station is generated, a signal generation unit is configured to include.

[0008] An operation method of a remote monitoring and control device according to another aspect of the present invention is An operation method of a remote monitoring and control device that is installed in a control station and uses a plurality of selection relays corresponding to a plurality of devices respectively and a control relay for controlling the device selected by the operation of the selection relay, and selects and controls the device based on a command transmitted from the control station, comprising: When the remote-direct changeover switch among a plurality of switch groups including at least a remote-direct changeover switch, an operation-test changeover switch, and a normal-simulated remote changeover switch is switched to the remote side, generating a signal for validating the command from the control station; When the remote-direct changeover switch is switched to the direct side, generating a signal for validating the command from the control station when the operation-test changeover switch is switched to the test side and the normal-simulated remote changeover switch is switched to the simulated remote side, and generating a signal for invalidating the command from the control station otherwise; configured to include the above.

[0009] Further, a program according to another aspect of the present invention is on a computer that constitutes a remote monitoring and control device that is installed in a controlled station and uses a plurality of selection relays corresponding to a plurality of devices respectively and a control relay for controlling the device selected by the operation of the selection relay, and selects and controls the device based on a command transmitted from the control station, When the remote-direct changeover switch among a plurality of switch groups including at least a remote-direct changeover switch, an operation-test changeover switch, and a normal-simulated remote changeover switch is switched to the remote side, performing a process of generating a signal for validating the command from the control station; When the remote-direct changeover switch is switched to the direct side, performing a process of generating a signal for validating the command from the control station when the operation-test changeover switch is switched to the test side and the normal-simulated remote changeover switch is switched to the simulated remote side, and generating a signal for invalidating the command from the control station otherwise; configured to cause the above to be performed.

Advantages of the Invention

[0010] With the configuration as described above, the present invention can test whether the contacts of the selection relay and the control relay in the selection-control dual-behavior mode close correctly according to the command transmitted from the control station, without operating the field devices. Therefore, it becomes possible to detect problems such as relay fusion at an early stage.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0012] Next, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, when there are a plurality of identical or similar elements, common reference numerals may be used to describe each element without distinction, and branch numbers may be added to the common reference numerals to describe each element separately. [First Embodiment] FIG. 1 is a block diagram showing a configuration example of a remote monitoring and control system 1 including a remote monitoring and control device 20 according to the present invention. The remote monitoring and control system 1 is a system for monitoring and controlling power equipment 30 installed in an electrical facility such as a power plant or a substation from a remote control station. Referring to FIG. 1, the remote monitoring and control system 1 includes a control station device 10 provided at the control station and a remote monitoring and control device 20 provided at the controlled station. The remote monitoring and control system 1 transmits control information from the control station device 10 to the power equipment 30 via the remote monitoring and control device 20, and conversely transmits display / measurement information from the power equipment 30 to the control station device 10 via the remote monitoring and control device 20, thereby monitoring and controlling the power equipment 30 from the control station.

[0013] FIG. 2 is a block diagram showing an example of the configuration of the remote monitoring and control device 20 and the power equipment 30. Referring to FIG. 2, the remote monitoring and control device 20 includes a processing unit 21, a transmission / reception unit 22, and a control unit 23. The transmission / reception unit 22 transmits and receives control information and display / measurement information to and from the control station device 10. The processing unit 21 transmits control information to the power equipment 30 via the control unit 23 based on the control information from the control station received via the transmission / reception unit 22. Further, the processing unit 21 transmits the display / measurement information from the power equipment 30 received via the control unit 23 to the control station device 10 via the transmission / reception unit 22. Further, the power equipment 30 includes, for example, an operation unit 31 such as a trip coil or an energizing coil, and a circuit breaker 33 of a transmission line 32.

[0014] FIG. 3 is a diagram showing an example of the configuration of the main part of the control unit 23. Referring to FIG. 3, the control unit 23 includes a remote-direct changeover switch 43R, a control relay OP(CL), a selection relay POS, a terminal 231, and a P power supply (DC plus power supply for control). The remote-direct changeover switch 43R is a manual switch that closes when switched to the remote side and opens when switched to the direct side. The selection relay POS is a relay for selecting one power device 30 from a plurality of power devices 30, and operates to select the corresponding power device 30 when the contact is closed. The control relay OP(CL) is a relay for controlling the power device 30 selected by the selection relay POS, and operates to control the power device 30 when the contact is closed. Generally, the control relay OP(CL) is divided into an open (OP) type and a close (CL) type, but in FIG. 3, it is simplified for convenience of explanation. The above-mentioned remote-direct changeover switch 43R, control relay OP(CL), and selection relay POS are basically components provided in the remote monitoring control device 20 of the two-behavior type of selection-control.

[0015] In addition to the above basic components, the control unit 23 further includes an operation-test changeover switch 43T1, a test terminal 232 which is a test control common, and a signal generation unit 233.

[0016] The operation-test changeover switch 43T1 is a manual switch that opens when switched to the operation side and closes when switched to the test side. One terminal is connected to the control common TCCOM of the control relay OP(CL) and the selection relay POS, and the other terminal is connected to the test terminal 232. Therefore, the test terminal 232 is electrically connected to the control common TCCOM when the changeover switch 43T1 is switched to the test side and closed.

[0017] The signal generation unit 233 is provided with a normal - analog remote change - over switch 234 and is configured to generate a display signal 235 indicating the validity or invalidity of a command from the control station device 10. When the remote - direct change - over switch 43R is switched to the remote side, the signal generation unit 233 generates a display signal 235 indicating validity. Also, when the remote - direct change - over switch 43R is switched to the direct side, the signal generation unit 233 generates a display signal 235 indicating validity when the operation - test change - over switch 43T1 is switched to the test side and the normal - analog remote change - over switch 234 is switched to the analog remote side, and generates a display signal 235 indicating invalidity otherwise. That is, the signal generation unit 233 generates a display signal 235 indicating validity only when the remote - direct change - over switch 43R is switched to the direct side and the operation - test change - over switch 43T1 is switched to the test side and the normal - analog remote change - over switch 234 is switched to the analog remote side.

[0018] The display signal 235 is configured to be transmitted from the control unit 23 to the processing unit 21 and further transmitted from the processing unit 21 to the control station device 10 through the transceiver unit 22. The control station device 10 displays whether the display signal 235 is valid or invalid on a control panel (not shown) provided in the control station device 10 to display it to the operator of the control station. Also, when the display signal 235 is valid, the control station device 10 accepts the operation of selecting / controlling the power equipment 30 from the control panel, generates control information corresponding to the accepted operation, and transmits it to the remote monitoring and control device 20. Also, when the display signal 235 is invalid, the control station device 10 rejects the operation of selecting / controlling the power equipment 30 from the control panel. On the other hand, when the display signal 235 is valid, the processing unit 21 of the remote monitoring and control device 20 accepts the control information from the control station device 10 and controls the control unit 23 accordingly. Also, when the display signal 235 is invalid, even if the processing unit 21 receives control information from the control station device 10, it does not control the control unit 23 according to the control information and rejects it.

[0019] As shown in FIG. 3, the signal generation unit 233 can be realized by a relay sequence circuit that connects a switching switch 43D that performs an opposite switch operation in conjunction with the remote-direct switching switch 43R, a switching switch 43T2 that performs an opposite switch operation in conjunction with the operation-test switching switch 43T1, and the above-described normal-simulated remote switching switch 234 as shown in the figure. In this case, the display signal 235 is valid when it does not become the potential of the P power supply and is invalid when it does. In this signal generation unit 233, the switching switch 43D constitutes means for detecting whether the remote-direct switching switch 43R is on the remote side or the direct side, and the switching switch 43T2 constitutes means for detecting whether the operation-test switching switch 43T1 is on the operation side or the test side. Further, the connection relationship among the switching switch 43D, the switching switch 234, and the switching switch 43T2 as shown in FIG. 3 constitutes means for detecting the logical product condition that the remote-direct switching switch 43R is on the direct side, the normal-simulated remote switching switch 234 is on the simulated remote side, and the operation-test switching switch 43T1 is on the test side.

[0020] In addition to being realized by a relay sequence circuit, the signal generation unit 233 having the above functions can also be realized by a computer including an arithmetic processing unit composed of, for example, a CPU (Central Processing Unit) and a storage unit composed of a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and a program. The program is recorded and provided on a computer-readable recording medium, read by the arithmetic processing unit when the computer is started up, etc., and controls the operation of the arithmetic processing unit to realize the signal generation unit 233 on the arithmetic processing unit.

[0021] Next, the operation of the remote monitoring control device 20 will be described.

[0022] When the control power supply (not shown) of the remote monitoring and control device 20 is turned on, for example, the changeover switch 43R is in the remote side (closed) so that control can be performed from a remote location. Also, the changeover switch 234 is in the normal side. Therefore, the P power supply is applied to the control relay OP (CL) through the changeover switch 43R. Also, since the changeover switch 43D is open, the display signal 235 from the signal generation unit 233 indicates invalidity because it is not the P power supply.

[0023] Since the display signal 235 is valid, the control station device 10 determines that the remote monitoring and control can be performed. Therefore, when an operation for selecting / controlling the power equipment 30 is input from the operation panel installed at the control station, the control station device 10 generates necessary control information and transmits it to the remote monitoring and control device 20. Also, since the display signal 235 is valid, the processing unit 21 of the remote monitoring and control device 20 receives the control information from the control station device 10 and controls the control unit 23 accordingly. Therefore, for example, when the processing unit 21 receives the control information for selecting / controlling the power equipment 30-1, it performs control to close the contacts of the selection relay POS-1 and the control relay OP (CL). As a result, the P power supply is supplied to the power equipment 30-1 through the changeover switch 43R, the control relay OP (CL), the selection relay POS-1, and the terminal 231-1, and the circuit breaker 33 is opened and closed by the operation unit 31.

[0024] On one hand, to enable direct control, when the operator of the controlled station switches the changeover switch 43R to the direct side (open) from the above state, the changeover switch 43D is interlocked to change from open to closed, and the voltage of the P power supply appears in the display signal 235 through the normal side of the changeover switch 43D and the changeover switch 234, and the display signal 235 changes from valid to invalid. This change in the display signal 235 is promptly transmitted to the processing unit 21 and further transmitted from the processing unit 21 to the control station device 10. If the display signal 235 is invalid, the control station device 10 determines that remote control cannot be performed. Therefore, the control station device 10 does not accept the operation of selecting and controlling the electrical equipment 30 from the operation panel installed at the control station. Also, if the display signal 235 is invalid, the processing unit 21 rejects the control information even if it is received from the control station device 10. This prevents accidents such as electric shock caused by incorrect remote control when control can be performed from the direct control panel (not shown) provided at the controlled station.

[0025] Also, for testing purposes, when the operator of the controlled station further switches the switching switch 43T1 to the test side (closed) from the above state, the test terminal 232 is electrically connected to the control common TCCOM. Even at this point, the display signal 235 remains invalid. However, the switching switch 43T2 opens in conjunction with the switching switch 43T1 at this time. Subsequently, when the operator of the controlled station switches the switching switch 234 from the normal side to the simulated remote side, since the switching switch 43T2 is open, the P power supply does not appear in the display signal 235, and the display signal 235 changes from invalid to valid. This change in the display signal 235 is promptly transmitted to the processing unit 21 and further transmitted from the processing unit 21 to the control station device 10. Therefore, when an operation for selecting / controlling the power equipment 30 for testing is input from the operation panel installed at the control station to the control station device 10, the control station device 10 generates the necessary control information and transmits it to the remote monitoring and control device 20. Also, since the display signal 235 is valid, the processing unit 21 of the remote monitoring and control device 20 receives the control information from the control station device 10 and controls the control unit 23 accordingly. As a result, when the processing unit 21 receives, for example, the control information for selecting / controlling the power equipment 30-1, it performs control to close the contacts of the selection relay POS-1 and the control relay OP(CL). However, since the switching switch 43R is in the open state, even if the contacts of the selection relay POS-1 and the control relay OP(CL) are closed, the P power supply is not applied to the operation unit 31 of the power equipment 30-1. As a result, the circuit breaker 33 does not operate.

[0026] The operator of the controlled station can confirm whether the contacts of the selection relay POS-1 and the control relay OP(CL) are closed by performing a continuity check between the test terminal 232 and the terminal 231-1 using a measuring instrument such as a tester. Also, in the same manner as above, it is possible to test whether the contacts of other selection relays and control relays close in response to a command from the control station.

[0027] After the completion of a series of tests, when the operator of the controlled station switches the switching switch 234 from "simulated remote" to "normal" and switches the switching switch 43T1 to the operation side (open), the display signal 235 changes from valid to invalid. As a result, the power equipment 30 can be controlled directly from the control panel. Further, when the operator of the controlled station switches the switching switch 43R from the direct side (open) to the remote side (closed), the switching switch 43D opens and the display signal 235 changes from invalid to valid. As a result, the power equipment 30 can be controlled from the control panel of the control station.

[0028] As described above, the remote monitoring and control device 20 according to the present embodiment generates a display signal 235 that enables a command from the control station device 10 when the remote-direct switching switch 43R is switched to the remote side, and when the operation-test switching switch 43T1 is switched to the test side and the normal-simulated remote switching switch 234 is switched to the simulated remote side while the remote-direct switching switch 43R is switched to the direct side, it generates a display signal 235 that enables a command from the control station device 10. However, in other cases, it has a signal generation unit 233 that generates a display signal 235 that invalidates a command from the control station device 10. Therefore, during the test, by switching the remote-direct switching switch 43R to the direct side, the operation-test switching switch 43T1 to the test side, and the normal-simulated remote switching switch 234 to the simulated remote side respectively, it becomes possible to test whether the contacts of the selection relay POS and the control relay OP (CL) in the selection-control two-behavior mode close correctly according to the control information transmitted from the control station device 10 without operating the power equipment 30.

[0029] Further, the remote monitoring and control device 20 has a test terminal 232 that is electrically connected to the control common TCCOM of the selection relay POS and the control relay OP (CL) when the operation - test change - over switch 43T1 is switched to the test side (closed). Therefore, an operator of the controlled station can easily confirm whether the contacts of the selection relay POS and the control relay OP (CL) are closed or not by using a measuring device such as a tester to check for continuity between the test terminal 232 and the terminal 231 corresponding to the selected and controlled power equipment 30.

[0030] <Example> Next, an example of the remote monitoring and control device 20 according to this embodiment will be described.

[0031] FIG. 4 is a diagram showing the main - part configuration of the remote monitoring and control device 20 according to this example. Referring to FIG. 4, the DC power supply supplied from the DC distribution board is input to the remote control auxiliary board from the 110P terminal and the 110N terminal, and is supplied to the change - over switch 43R through the control power switch 8S, and is also input to the controlled device through the PB terminal and the NB terminal.

[0032] The DC positive power supply PR passing through the change - over switch 43R is supplied as the control common TCCOM to one end side of the control relay OP (CL) through the upper - stage switch of the change - over switch 43T composed of three interlocking switches in the upper, middle, and lower stages. The CL bus and the OP bus are connected to the other end side of the control relay OP (CL) and one end side of the selection relay POS. When the contact of any one of the selection relays POS and the control relay OP (CL) is closed, the DC positive power supply supplied to one end side of the control relay OP (CL) is configured to be supplied to the operation unit provided on the main board through the CL041 - CL160 terminals or OP041 - OP160 terminals corresponding to the selected selection relay POS.

[0033] Also, the test terminal TEST is connected to the control common TCCOM through the middle switch of the switching switch 43T. Further, a signal generation unit 233 including the lower switch of the switching switch 43T, the normal - simulated remote switching switch 234, and the switching switch 43D is provided in the remote control auxiliary panel, and the DC plus power supply PS is configured to be applied to one end side of the switching switch 43D via the device to be controlled. The display signal 235 of the signal generation unit 233 is treated as SR040 of the display input (4 groups 0 pieces) (directly open) in FIG. 4.

[0034] The middle switch of the switching switch 43T corresponds to the switching switch 43T1 in FIG. 3, and the lower switch corresponds to the switching switch 43T2 in FIG. 3. The upper switch is a switch that opens when the middle switch is on the test side (closed) and closes when it is on the normal side (open), and is provided to surely cut off the supply to the control relay of the control power supply during the test.

[0035] FIG. 5 is a diagram showing the sequence of simulating a remote test of CL160 and the states of the switches at each step. In the figure, the locations marked with ★ represent the locations where the switch states have changed from the previous step. Hereinafter, with reference to FIGS. 4 and 5, the operation of simulating a remote test of CL160 will be described.

[0036] <Simulated remote test start step> At the start of the simulated remote test, the control power switch 8S is open, the remote - direct switching switch 43R is closed, the switching switch 43D is open, the upper switch of the normal - test switching switch 43T is closed, the middle switch is open, the lower switch is closed, and the simulated remote switch is on the normal side, respectively switched.

[0037] <8S on (remote control panel power supply) step> The operator of the control station manually closes the control power switch 8S. As a result, the control power is applied to one end of the control relay OP(CL) through the upper switches of the changeover switch 43R and the changeover switch 43T, and is also applied to one end of the changeover switch 43D through the device under control. Since the changeover switch 43D is open, the display input SR040 represents remote.

[0038] <43RD (direct) step> Next, when the operator of the controlled station manually opens the changeover switch 43R, the changeover switch 43D closes in conjunction with it. As a result, the supply of the control power to one end of the control relay OP(CL) is cut off. Also, when the changeover switch 43D closes, the power supply PS appears at the display input SR040 through the changeover switch 43D and the simulated remote switch, and the display input SR040 comes to represent direct.

[0039] <43T (test)> Next, when the operator of the controlled station manually opens the upper switch of the changeover switch 43T, the middle switch closes and the lower switch opens in conjunction with it. When the middle switch closes, the TEST terminal is electrically connected to the control common TCCOM. Also, when the upper switch opens, the supply of the control power to the control relay OP(CL) is surely cut off by the series circuit of the open changeover switch 43R and the said upper switch.

[0040] <Simulated remote switch (simulated remote)> Next, when the operator of the controlled station manually switches the normal - simulated remote changeover switch to the simulated remote side, since the lower switch of the changeover switch 43T is open, the power supply PS does not appear at the display input SR040, and a remote (simulated) signal will be transmitted to the control station.

[0041] <CL160 control from the control station> Next, when the operator in the control station performs the control of CL160 from the control panel of the control station device 10, a control signal is transmitted from the control station device 10 to the remote monitoring and control device 20. When the processing unit 21 of the remote monitoring and control device 20 receives this control signal via the transmission and reception unit 22, it closes the contacts of the selection relay POS130 corresponding to CL160 in the control unit 23, and also performs control to close the contacts of the control relay CL1. At this time, since the supply of the control power to one end side of the control relay CL1 is cut off by the opening of the upper switches of the changeover switches 43R and 43T, even if the contacts of the selection relay POS130 and the control relay CL1 are closed, the control power is not supplied to the main board through CL160. Therefore, the field devices corresponding to CL160 do not operate.

[0042] <Conductivity check between the TEST terminal and the CL160 terminal> Next, the operator in the controlled station uses a measuring device such as a tester to perform a conductivity check between the TEST terminal and the CL160 terminal to confirm whether the contacts of the selection relay POS130 and the control relay CL1 are closed.

[0043] Thus, the simulated remote test of CL160 can be completed. When continuously performing the simulated remote tests at other locations such as CL041, repeat the same steps as <CL160 control from the control station> and <Conductivity check between the TEST terminal and the CL160 terminal>. When a series of simulated remote tests are completed, when the operator in the controlled station switches the normal - simulated remote changeover switch from "simulated remote" to "normal", the display input SR040 changes directly from the remote side. As a result, the field devices can be controlled directly from the control panel. Furthermore, when the operator in the controlled station closes the changeover switch 43R, the changeover switch 43D opens in conjunction, so the display input SR040 changes from direct to remote. As a result, the field devices can be controlled from the control panel of the control station.

[0044] If the operator of the controlled station forgets to switch the middle switch of the changeover switch 43T to the operating side (open) after the series of simulated remote tests are completed, the upper switch will remain open. To prevent this from happening, for example, a mechanism may be provided that turns on a specific bit (e.g., F2 bit (test bit)) in the display position when the middle switch of the changeover switch 43T is closed.

[0045] Although the present invention has been described above with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. For example, instead of the CPU described above, a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an MPU (Micro Processing Unit), an FPU (Floating Number Processing Unit), a PPU (Physics Processing Unit), a TPU (Tensor Processing Unit), a quantum processor, a microcontroller, or a combination thereof can be used. [Industrial Applicability]

[0046] The present invention can be used for testing remote monitoring and control devices in general. [Explanation of symbols]

[0047] 1 Remote monitoring and control system 10 Control center equipment 20 Remote monitoring and control device 21 Processing section 22 Transmitter / Receiver 23 Control Unit 30 Power equipment 31 Operation section 32 Power Lines 33 Circuit Breaker 231 terminal 232 Test terminal 233 Signal Generation Unit 234 Normal - analog remote changeover switch 235 Display signal indicating the validity of a command from the control station device

Claims

1. A remote monitoring and control device that is installed in a controlled station and uses a plurality of selection relays corresponding to a plurality of devices respectively and a control relay for controlling the device selected by the operation of the selection relay to select and control the device based on a command transmitted from a control station, Among a plurality of switch groups including at least a remote-direct changeover switch, an operation-test changeover switch, and a normal-simulated remote changeover switch, when the remote-direct changeover switch is switched to the remote side, a signal for validating the command from the control station is generated, and when it is switched to the direct side, when the operation-test changeover switch is switched to the test side and the normal-simulated remote changeover switch is switched to the simulated remote side, a signal for validating the command from the control station is generated, but otherwise, a signal for invalidating the command from the control station is generated, a signal generation unit, A remote monitoring and control device comprising the same.

2. The signal generation unit is constituted by a relay sequence circuit including a first changeover switch that performs an opposite switch operation in conjunction with the remote-direct changeover switch, a second changeover switch that performs an opposite switch operation in conjunction with the operation-test changeover switch, and the normal-simulated remote changeover switch. The remote monitoring and control device according to Claim 1.

3. The signal generation unit includes a computer and a program executed by the computer, and is configured to perform the signal generation operation by the cooperation of the computer and the program. The remote monitoring and control device according to Claim 1.

4. It has a test terminal that is electrically connected to the control common of the selection relay and the control relay when the operation-test changeover switch is switched to the test side. The remote monitoring and control device according to Claim 1.

5. It is provided on the wiring path between the remote-direct changeover switch and the control relay and has a third changeover switch that performs an opposite switch operation in conjunction with the operation-test changeover switch. The remote monitoring and control device according to Claim 1.

6. An operation method of a remote monitoring and control device that is installed in a controlled station and uses a plurality of selection relays corresponding to a plurality of devices respectively and a control relay for controlling the device selected by the operation of the selection relay to select and control the device based on a command transmitted from a control station, Among a plurality of switch groups including at least a remote - direct changeover switch, an operation - test changeover switch, and a normal - simulated remote changeover switch, when the remote - direct changeover switch is switched to the remote side, a step of generating a signal for validating the command from the control station; When the remote - direct changeover switch is switched to the direct side, when the operation - test changeover switch is switched to the test side and the normal - simulated remote changeover switch is switched to the simulated remote side, a step of generating a signal for validating the command from the control station, but otherwise generating a signal for invalidating the command from the control station; including An operation method of a remote monitoring control device.

7. In a computer that configures a remote monitoring control device that is installed in a controlled station and uses a plurality of selection relays corresponding to a plurality of devices respectively and a control relay for controlling the device selected by the operation of the selection relay, and selects and controls the device based on a command transmitted from a control station, Among a plurality of switch groups including at least a remote - direct changeover switch, an operation - test changeover switch, and a normal - simulated remote changeover switch, a process of generating a signal for validating the command from the control station when the remote - direct changeover switch is switched to the remote side; When the remote - direct changeover switch is switched to the direct side, a process of generating a signal for validating the command from the control station when the operation - test changeover switch is switched to the test side and the normal - simulated remote changeover switch is switched to the simulated remote side, but otherwise generating a signal for invalidating the command from the control station; A program for causing the above to be performed.

Images