CN115549289A - Remote control misoperation prevention system - Google Patents
Remote control misoperation prevention system Download PDFInfo
- Publication number
- CN115549289A CN115549289A CN202110737361.4A CN202110737361A CN115549289A CN 115549289 A CN115549289 A CN 115549289A CN 202110737361 A CN202110737361 A CN 202110737361A CN 115549289 A CN115549289 A CN 115549289A
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- Prior art keywords
- remote control
- signal
- cpu
- module
- relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a remote control misoperation prevention system, which is used for controlling the action of a relay of a power distribution terminal and comprises the following components: the system comprises a CPU remote control module, a monitoring module and a logic judgment module; the CPU remote control module is used for starting a remote control selection signal and a check signal of a normal working state according to a remote control requirement; the monitoring module is used for acquiring the inspection signal of the normal working state and feeding back information to the CPU remote control module, and the CPU remote control module outputs a CPU normal operation signal after receiving the feedback information; and the logic judgment module is used for outputting a remote control signal for controlling the action of the relay when receiving the CPU normal operation signal and the remote control selection signal at the same time.
Description
Technical Field
The invention relates to a remote control misoperation prevention system, and belongs to the technical field of electric power automation.
Background
Among DTUs (station terminals) and FTUs (feeder terminals) used in the market at present, the station terminals are power distribution terminals installed at power distribution network switching stations, power distribution rooms, ring main units, box-type substations and the like, complete functions of data acquisition, remote control, local fault action, line loss measurement, communication and the like, and simultaneously have the capacity of receiving local primary equipment state monitoring data and analyzing and processing the data, and the station terminals can be divided into centralized station terminals and distributed station terminals according to arrangement modes; the feeder terminal is a power distribution terminal installed on a power distribution network overhead line tower and the like, and is classified into 3 types, namely an electromagnetic type, an electronic type and a digital type according to the different electrical quantity acquisition mutual inductors/sensors of a column switch and the interface form with the column switch.
In the prior art, most remote control circuits are controlled by using a CPU, and the existing remote control misoperation protection measures on the market only simply require a CPU pin to keep a certain state, although the reliability is certain, under the condition of small probability, for example: when the remote control preparation program is started and all the states are in place, the CPU is halted, all the remote control outputs (more than 32 paths and less than 4 paths) belong to the trigger state, the monitoring chip detects that the CPU is halted and restarts the CPU, all the remote controls can be mistakenly operated, the devices need to be connected to a national power grid, and if the remote control misoperation occurs, the loss is disastrous.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a remote control misoperation prevention system.
In order to solve the above technical problem, the present invention provides a remote control malfunction prevention system for controlling the operation of a relay of a power distribution terminal, including: the system comprises a CPU remote control module, a monitoring module and a logic judgment module;
the CPU remote control module is used for starting a remote control selection signal and a check signal of a normal working state according to a remote control requirement;
the monitoring module is used for acquiring the inspection signal of the normal working state and feeding back information to the CPU remote control circuit, and the CPU remote control circuit outputs a CPU normal operation signal after receiving the feedback information;
and the logic judgment module is used for outputting a remote control signal for controlling the action of the relay when receiving the CPU normal operation signal and the remote control selection signal at the same time.
Further, the check signal is a square wave signal with fixed frequency output when the CPU remote control module normally operates.
Further, the monitoring module is configured to output a locking signal to the relay when the inspection signal is not acquired, and the relay is locked and is in an uncontrollable state.
Further, the monitoring module is used for outputting an unlocking signal to the relay when the inspection signal is acquired, and the relay is unlocked and can be controlled.
Further, the monitoring module adopts a dual-triggerable monostable multivibrator module.
Furthermore, the logic judgment module adopts a nor gate module and is used for receiving a CPU running normal signal and a remote control selection signal, wherein the CPU running normal signal is a low level signal, the remote control selection signal is a low level signal, and a remote control signal output by the nor gate module is a high level signal.
The invention achieves the following beneficial effects:
the protection measures of the invention for remote control misoperation require that the CPU pin outputs square waves within the set time, so that the CPU keeps the program running all the time, once the program does not run, the square waves stop, and at the moment, the remote control cannot be started no matter which state the CPU pin is kept, thereby avoiding the remote control misoperation.
Drawings
Fig. 1 is a circuit schematic of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a remote malfunction prevention system for controlling the operation of a relay of a power distribution terminal includes: the system comprises a CPU remote control module, a monitoring module and a logic judgment module;
the CPU remote control module is used for starting a remote control selection signal and a check signal of a normal working state according to a remote control requirement;
the monitoring module is used for collecting the inspection signal of the normal working state and feeding back information to the CPU remote control module, the CPU remote control module outputs a CPU normal operation signal after receiving the feedback information, in this embodiment, the monitoring module adopts an SN74AHC123AD dual triggerable monostable multivibrator chip for acquiring an inspection signal output by a monitoring pin of the CPU remote control module;
the logic determining module is configured to output a remote control signal for controlling the relay to operate when receiving a CPU normal operation signal and a remote control selection signal at the same time, and in this embodiment, the logic determining module uses a 74LVC1G02DBVR nor chip and is configured to perform logic determination on an input signal.
The check signal is a square wave signal with fixed frequency output when the CPU remote control module works normally.
And the monitoring module is used for outputting a locking signal to the relay when the checking signal cannot be acquired, and the relay is locked and is in an uncontrollable state.
And the monitoring module is used for outputting an unlocking signal to the relay when the inspection signal is acquired, and the relay is unlocked and can be controlled.
The monitoring module adopts a double triggerable monostable multivibrator module.
The NOT gate module is used for receiving a CPU normal operation signal and a remote control selection signal, wherein the CPU normal operation signal is a low level signal, the remote control selection signal is a low level signal, and a remote control signal output by the NOT gate module is a high level signal.
The working principle of the invention is as follows:
YK _ WDI is a monitored pin output by the CPU, and the relay locking state can be released only when the pin outputs a fixed frequency square wave all the time. The relay can be started only by matching with a remote control selection signal DZ _ QD and judging through a gate circuit. (the model in the figure is a common model, and a plurality of chips with the same function are owned on the market and are not listed one by one).
When the CPU can normally run, the pin can normally output the square wave, the double triggerable monostable multivibrator of the monitoring pin can release the locking state of the relay, at the moment, the relay is in a controllable state, otherwise, the output pin of the chip of the double triggerable monostable multivibrator can lock the relay, and the action of the relay is prevented. The time for the CPU to output the square wave can be determined by referring to the capacitance and the resistance connected on the pin by using a 'double triggerable monostable multivibrator'.
The protection measure for the remote control misoperation is that the state output by the pin of the CPU is required to be changed all the time, the pin of the CPU can be changed all the time only under the condition that a program runs normally, the program can not run normally under any uncontrollable conditions such as the time that the CPU is halted or started, and the pin of the CPU can not output correct change frequency, so that the remote control can not act, and the protection method is used for protecting a product from the phenomenon of remote control misoperation.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (6)
1. A remote anti-malfunction system for controlling the operation of a relay of a power distribution terminal, comprising: the system comprises a CPU remote control module, a monitoring module and a logic judgment module;
the CPU remote control module is used for starting a remote control selection signal and a check signal of a normal working state according to a remote control requirement;
the monitoring module is used for acquiring the inspection signal of the normal working state and feeding back information to the CPU remote control module, and the CPU remote control module outputs a CPU normal operation signal after receiving the feedback information;
and the logic judgment module is used for outputting a remote control signal for controlling the action of the relay when receiving the CPU normal operation signal and the remote control selection signal at the same time.
2. The remote malfunction prevention system according to claim 1, wherein the check signal is a square wave signal of a fixed frequency outputted when the CPU remote control module is operating normally.
3. The remote malfunction prevention system according to claim 1, wherein the monitoring module is configured to output a lock signal to the relay when the check signal is not acquired, and the relay is locked and is in an uncontrollable state.
4. The remote anti-malfunction system according to claim 1, wherein the monitoring module is configured to output an unlock signal to the relay when the check signal is acquired, and the relay is unlocked and can be controlled.
5. The remote anti-malfunction system according to claim 3 or 4, wherein the monitoring module employs a dual retriggerable monostable multivibrator module.
6. The remote control malfunction prevention system according to claim 1, wherein the logic determination module is a nor gate module for receiving a CPU operation normal signal and a remote control selection signal, wherein the CPU operation normal signal is a low level signal, the remote control selection signal is a low level signal, and the remote control signal output by the nor gate module is a high level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737361.4A CN115549289A (en) | 2021-06-30 | 2021-06-30 | Remote control misoperation prevention system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737361.4A CN115549289A (en) | 2021-06-30 | 2021-06-30 | Remote control misoperation prevention system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115549289A true CN115549289A (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110737361.4A Pending CN115549289A (en) | 2021-06-30 | 2021-06-30 | Remote control misoperation prevention system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115549289A (en) |
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2021
- 2021-06-30 CN CN202110737361.4A patent/CN115549289A/en active Pending
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