CN111769642A - Processing method for preventing mistaken development of incoming telecommand deflection information during power failure - Google Patents
Processing method for preventing mistaken development of incoming telecommand deflection information during power failure Download PDFInfo
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- CN111769642A CN111769642A CN202010629322.8A CN202010629322A CN111769642A CN 111769642 A CN111769642 A CN 111769642A CN 202010629322 A CN202010629322 A CN 202010629322A CN 111769642 A CN111769642 A CN 111769642A
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- power supply
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- remote signaling
- switch
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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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a processing method for preventing the mistaken development of remote signaling deflection information during power failure of a power supply, which comprises the following steps: selecting a standby switch-in on a switch-in board of a relay protection and measurement and control device as 'external switch-in power supply monitoring', and monitoring an external switch-in power supply in real time; when the 'external power supply monitoring' is started from '1' to '0', a delay relay is triggered, the time is set to be 1 second, and the remote signaling starting displacement information is shielded; if the rest of the open input devices are '1' in the 1 second, the open input of the 'external open power supply monitoring' is changed from '1' to '0', the abnormal displacement is considered, and the open input telecommand displacement information is updated in real time; and when the delay is finished, a power supply abnormity alarm is issued. The invention monitors the external power supply of the device as a fixed switch-in, judges other switch-in states and designs logics, identifies the power failure condition of the external switch-in and the power supply of the device, and avoids the phenomenon that the device wrongly sends out remote signaling displacement information in the process.
Description
Technical Field
The invention relates to the technical field of power system relay protection, in particular to a processing method for preventing misinterpretation of incoming telecommand displacement information during power failure.
Background
The state quantity remote signaling reflects the actual running state of the primary equipment of the transformer substation, and a transformer substation attendant or dispatcher operates the switch and the disconnecting link according to the actual running state; the switching value remote signaling mainly reflects the abnormal condition of the primary equipment of the transformer substation and the protection action condition of the protection device. Therefore, the monitoring system must reduce the false alarm and the missing alarm of remote signaling as much as possible to avoid the signal jitter phenomenon in order to correctly reflect the operation condition of the transformer substation. The remote signaling false alarm problem is a hidden danger of power grid dispatching safety and must be paid attention to and solved. In order to reduce the remote signaling false alarm, the following technical scheme is adopted conventionally:
(1) the photoelectric isolator is connected in series in the remote signaling acquisition loop, and floating 24V level output by the remote signaling board is isolated and converted into 220V level to be added to two ends of the auxiliary contact of the disconnecting link, so that the anti-interference performance of the remote signaling loop is greatly improved;
(2) the contact of the disconnecting link collects double-position remote signaling: a pair of normally open contacts and a pair of normally closed contacts;
(3) a Schmitt jitter elimination circuit is placed after an acquisition board photoelectric isolation circuit is opened by utilizing the double threshold triggering characteristic of a Schmitt trigger;
(4) and setting the starting anti-shaking time on the software.
According to the conventional method, the relay protection and measurement and control device can prevent the occurrence of the phenomenon of open remote signaling false alarm when in normal operation to a great extent by a hardware jitter elimination method and a software jitter elimination method. However, the relay protection and measurement and control device also requires that information inconsistent with external input should not be sent in the power-on and restart processes of the device, because the input remote signaling power supply and the device power supply belong to the same external power supply, when the external power supply is restarted or powered off and the relay protection and measurement and control device is restarted or powered off along with the input remote signaling power supply, because a capacitor charging and discharging process exists in a power module inside the device, a CPU of the device loses power later than the input remote signaling power supply, and the phenomenon of mistakenly sending input remote signaling displacement information is easy to happen.
Disclosure of Invention
The invention aims to solve the technical problem of providing a processing method for preventing the misinclusion of remote signaling deflection information during power failure, wherein an external input power supply of a device is used as a fixed input for monitoring, on the basis, the rest input states are judged, logics are designed, the power failure conditions of the external input power supply and the device belonging to the same power supply are identified, and the phenomenon that the device misinclusion of the remote signaling deflection information is avoided in the process.
In order to solve the technical problem, the invention provides a processing method for preventing the mistaken development of remote signaling deflection information when the power supply fails, which comprises the following steps:
(1) selecting a standby switch-in on a switch-in board of the existing relay protection and measurement and control device as 'external switch-in power supply monitoring', and monitoring an external switch-in power supply in real time;
(2) when the 'external power supply monitoring' is started from '1' to '0', a delay relay is triggered, the time is set to be 1 second, and the remote signaling starting displacement information is shielded;
(3) if the rest of the open input devices are '1' in the 1 second, the open input of the 'external open power supply monitoring' is changed from '1' to '0', the abnormal displacement is considered, and the open input telecommand displacement information is updated in real time;
(4) and when the delay is finished, a power supply abnormity alarm is issued.
Preferably, in the step (1), the configured "external power supply monitor" is preferentially processed in the program entry processing module. The method is characterized in that no jitter elimination processing is performed in software, so that when the external power supply monitoring and other external power supply monitoring are simultaneously powered off, displacement information of the external power supply monitoring is acquired at first time.
Preferably, in the step (2), the time of the delay relay is set to be 1 second, and when the time delay is over, the amplitude of the power supply of the device is monitored to be in the power-down process, and the time delay is properly increased. The power-down time of a CPU of the device is fully avoided when the external power supply is turned on and the power of the power supply of the device belongs to the same power supply.
Preferably, in the step (3), all the other switches are set to be '0' within 1 second, which indicates that the external switches and the power supply of the device belong to the same power supply are powered off; if the input remote signaling power supply is set to be '1', the other abnormal conditions are met, the remote signaling power supply is input from the outside and is not powered down, the device gives an alarm to remind an operator, and meanwhile, the input remote signaling deflection information is updated in real time.
Preferably, in the step (4), when the external switch-in and the device belong to the same power supply are powered off, the CPU in the device is powered off within 1 second, and the device is reliably ensured to have no switch-in remote signaling error displacement information and no switch-in power supply abnormal alarm; and under other abnormal conditions, a power supply abnormal alarm is started.
The invention has the beneficial effects that: the invention fully utilizes the standby switch-in on the switch-in board of the existing relay protection and measurement and control device, monitors the external switch-in remote signaling power supply, designs logic to identify the power failure phenomenon of the external switch-in and the device belonging to the same power supply, and has simple and reliable algorithm and easy realization; according to the invention, when the power failure phenomenon of the external input and device congeneric power supply occurs, the input quantity displacement information is quickly identified and shielded at the first time, so that the phenomenon that the device mistakenly sends the input remote signaling displacement information when the power failure phenomenon of the external input and device congeneric power supply occurs is effectively prevented, and the phenomenon that the monitoring system generates false remote signaling displacement to influence the scheduling safety is avoided.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of the phenomenon of misinterpretation of incoming telecommand displacement information according to the present invention.
Detailed Description
As shown in fig. 1, a processing method for preventing the misinterpretation of incoming telecommand displacement information during power failure includes the following steps:
(1) selecting a standby switch-in on a switch-in board of the existing relay protection and measurement and control device as 'external switch-in power supply monitoring', and monitoring an external switch-in power supply in real time;
(2) when the 'external power supply monitoring' is started from '1' to '0', a delay relay is triggered, the time is set to be 1 second, and the remote signaling starting displacement information is shielded;
(3) if the rest of the open input devices are '1' in the 1 second, the open input of the 'external open power supply monitoring' is changed from '1' to '0', the abnormal displacement is considered, and the open input telecommand displacement information is updated in real time;
(4) and when the delay is finished, a power supply abnormity alarm is issued.
In the step (1), configured 'external power supply monitoring' does not undergo any jitter elimination processing in software, and meanwhile, priority processing is carried out in a program input processing module so as to ensure that when the 'external power supply monitoring' and other external power inputs have simultaneous power failure conditions, displacement information of 'external power supply monitoring' is acquired at first time.
In the step (2), the time of the delay relay is set to be 1 second, and the time of the CPU power failure of the device is fully avoided when the external power supply and the power failure of the device belong to the same power supply are considered. When the time delay is over, the amplitude of the power supply of the device is monitored to be in the power-down process, and the time delay is properly increased.
In the step (3), all other switches are set to be '0' within 1 second, which fully explains the occurrence of power failure of external switches and the power supply of the device; if the input remote signaling power supply is set to be '1', the other abnormal conditions are met, the remote signaling power supply is input from the outside and is not powered down, the device gives an alarm to remind an operator, and meanwhile, the input remote signaling deflection information is updated in real time;
and (4) when the external switch-in and the device belong to the same power supply are powered down, the CPU of the device is powered down within 1 second, and the device is reliably ensured to have no switch-in remote signaling error displacement information and no switch-in power supply abnormal alarm. And under other abnormal conditions, a power supply abnormal alarm is started.
The external open power supply of the relay protection device of the power system and the power supply of the device belong to the same power supply, and the phenomenon that remote signaling displacement information is mistakenly opened when the power supply is powered off is shown in figure 2. The information of the mistaken displacement opening remote signaling is mainly classified into 2 types, one type is that the external opening directly changes the remote signaling, such as the position of a breaker and a disconnecting link; the other type is a virtual remote signaling generated in the protection device, such as a protection function switching state and a protection effective and invalid state related to a protection function hard pressing plate switching-in state.
The invention selects a standby switch-in on the switch-in board of the prior relay protection and measurement and control device as 'external switch-in power supply monitoring', and a remote signaling power supply of the switch-in amount of the device is switched in from a terminal row of a screen cabinet of the device.
When the device normally operates, the external switch-on power supply monitoring switch-on is always in a position 1, which represents that the external switch-on remote signaling power supply is normal. When it is detected that the "external on power monitoring" on is changed from "1" to "0", there are several possibilities:
(1) the 'external open power supply monitoring' open line is loose, and other open lines are not affected;
(2) when the external input and the device belong to the same power supply are powered off, the external input power supply monitors the input and other inputs simultaneously become 0.
The invention selects a standby switch-in on the switch-in board of the existing relay protection and measurement and control device to monitor the external switch-in power supply in real time, and obtains the displacement information of 'monitoring the external switch-in power supply' at the first time. When the 'external open power supply monitoring' is changed from '1' to '0', a 1-second delay relay is triggered, and open remote signaling displacement information is shielded. Within the delay time, if all other switches of the device are all '0', a power supply abnormity alarm is sent out; if the other opening of the device is 1, the delay relay is reset, and the remote signaling is opened for real-time updating.
Claims (5)
1. A processing method for preventing the misinterpretation of incoming telecommand displacement information during power failure is characterized by comprising the following steps:
(1) selecting a standby switch-in on a switch-in board of the existing relay protection and measurement and control device as 'external switch-in power supply monitoring', and monitoring an external switch-in power supply in real time;
(2) when the 'external power supply monitoring' is started from '1' to '0', a delay relay is triggered, the time is set to be 1 second, and the remote signaling starting displacement information is shielded;
(3) if the rest of the open input devices are '1' in the 1 second, the open input of the 'external open power supply monitoring' is changed from '1' to '0', the abnormal displacement is considered, and the open input telecommand displacement information is updated in real time;
(4) and when the delay is finished, a power supply abnormity alarm is issued.
2. The method for processing the information of preventing the remote signaling shift from being mistakenly opened during the power failure of the power supply according to claim 1, wherein the configured "external opening power supply monitoring" is preferentially processed in the program opening processing module in the step (1).
3. The method for processing the information of preventing the remote signaling displacement from being mistakenly sent out when the power supply is powered down as claimed in claim 1, wherein in the step (2), the time of the delay relay is set to be 1 second, and when the time delay is finished, the amplitude of the power supply of the device is monitored to be in the power-down process, and the time delay is properly increased.
4. The method for processing the information of preventing the misinterpretation of the incoming telecommand displacement during the power failure of the power supply according to claim 1, wherein in the step (3), all other incoming signals are set to be '0' within 1 second, which indicates that the external incoming signals and the device belong to the same power supply power failure condition; if the input remote signaling power supply is set to be '1', the other abnormal conditions are met, the remote signaling power supply is input from the outside and is not powered down, the device gives an alarm to remind an operator, and meanwhile, the input remote signaling deflection information is updated in real time.
5. The method for processing the information of preventing the mistaken opening of the remote signaling shift during the power failure of the power supply according to claim 1, wherein in the step (4), when the external opening and the device belong to the same power supply and are in power failure, a CPU (central processing unit) is powered off within 1 second, so that the device is reliably ensured to have no opening of the information of the remote signaling shift error and no opening of the power supply abnormal alarm; and under other abnormal conditions, a power supply abnormal alarm is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629322.8A CN111769642A (en) | 2020-07-03 | 2020-07-03 | Processing method for preventing mistaken development of incoming telecommand deflection information during power failure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010629322.8A CN111769642A (en) | 2020-07-03 | 2020-07-03 | Processing method for preventing mistaken development of incoming telecommand deflection information during power failure |
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| CN111769642A true CN111769642A (en) | 2020-10-13 |
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| CN202010629322.8A Pending CN111769642A (en) | 2020-07-03 | 2020-07-03 | Processing method for preventing mistaken development of incoming telecommand deflection information during power failure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852193A (en) * | 2021-09-16 | 2021-12-28 | 许昌许继软件技术有限公司 | Remote signaling misoperation prevention locking method and device based on signal power supply monitoring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001213A (en) * | 2011-09-13 | 2013-03-27 | 辽宁省电力有限公司本溪供电公司 | Continuous power supplying guarantee device for power supply |
| CN103368259A (en) * | 2011-10-28 | 2013-10-23 | 安徽省电力公司芜湖供电公司 | Testing method for time accuracy by utilizing system for testing remote communication traffic of substation measuring and control devices |
| US20180070434A1 (en) * | 2015-06-02 | 2018-03-08 | Ralph Gregory Greene | System and apparatus for selectively interrupting a power supply |
| CN111224371A (en) * | 2019-12-31 | 2020-06-02 | 南京因泰莱电器股份有限公司 | Relay protection method for power system |
-
2020
- 2020-07-03 CN CN202010629322.8A patent/CN111769642A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001213A (en) * | 2011-09-13 | 2013-03-27 | 辽宁省电力有限公司本溪供电公司 | Continuous power supplying guarantee device for power supply |
| CN103368259A (en) * | 2011-10-28 | 2013-10-23 | 安徽省电力公司芜湖供电公司 | Testing method for time accuracy by utilizing system for testing remote communication traffic of substation measuring and control devices |
| US20180070434A1 (en) * | 2015-06-02 | 2018-03-08 | Ralph Gregory Greene | System and apparatus for selectively interrupting a power supply |
| CN111224371A (en) * | 2019-12-31 | 2020-06-02 | 南京因泰莱电器股份有限公司 | Relay protection method for power system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852193A (en) * | 2021-09-16 | 2021-12-28 | 许昌许继软件技术有限公司 | Remote signaling misoperation prevention locking method and device based on signal power supply monitoring |
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Application publication date: 20201013 |