CN111224371A - Relay protection method for power system - Google Patents
Relay protection method for power system Download PDFInfo
- Publication number
- CN111224371A CN111224371A CN201911423971.6A CN201911423971A CN111224371A CN 111224371 A CN111224371 A CN 111224371A CN 201911423971 A CN201911423971 A CN 201911423971A CN 111224371 A CN111224371 A CN 111224371A
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- CN
- China
- Prior art keywords
- state
- power supply
- input
- enabling
- terminal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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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
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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
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a relay protection method for a power system, which is characterized in that after an external input power supply is suddenly powered off, in a program, before a function of detecting a common input state is operated, the state of 'enabling the input power supply' needs to be judged, so that the 'enabling the input power supply' is changed from a closed state to a separated state after the power supply is suddenly powered off, the program immediately locks the function of the common input state, and the original input in the closed state can not generate separated displacement information. The program always detects the state of 'enabling the power supply', when the external input power supply is powered on again, the 'enabling the power supply' is switched on and switched on, the function of detecting the state of the common input is switched on again, the input originally in the closed state is judged to be not shifted by the program as long as the primary equipment is still in the closed state at the moment, the displacement information is not generated, and the state signal of the external equipment can be fed back really.
Description
Technical Field
The invention relates to the technical field of power system relay protection, in particular to a power system relay protection method.
Background
The terminal of the power distribution station needs to collect various external position signals of primary equipment, can record real displacement events of various external signals, supports local storage of SOE event records of displacement signals and supports uploading of the displacement signals to the master scheduling station
The terminals of the power distribution station are all provided with independent power management modules to provide working power for the core unit, when the power collected by the terminals of the power distribution station is provided by an external direct current screen or other power sources in an actual project, the power distribution terminals normally collect the state information of field primary equipment under normal conditions, for example, the position of a circuit breaker of a current high-voltage switch cabinet is in a switching-on position, but if the power for supplying power to the switching-on amount is suddenly cut off (such as idle switching-on tripping or other various accidents), the core unit of the terminals of the power distribution station can normally collect the displacement information of the switching-on amount because of the working power of the switching-on amount is lost, the switching-on amount in the original closed state is changed into the separated state from the closed state, for example, the switching-on position of the high-voltage switch cabinet is changed into the switching-off position, and at the moment, the terminals of the power distribution station can record the SOE displacement event of the switching-on, and uploading the power distribution scheduling master station in real time, and when the power supply with the external input is recovered again, the power distribution terminal acquires that the high-voltage switch is in the switching-on position, then an SOE displacement event record is generated, and uploading the SOE displacement event record to the power distribution scheduling master station in real time. In reality, the position of the high-voltage switch is not changed all the time, but the problem of external power supply opening causes the terminal device of the power distribution station to mistakenly generate an SOE event with the displacement of the opening amount.
Disclosure of Invention
The invention provides a relay protection method of a power system for solving the problems in the prior art, and when an external power supply supplies power to an open-input quantity acquisition loop of a power distribution terminal, a displacement event of an open-input state of the terminal of a power distribution station caused by error of the external power supply can be avoided.
The invention comprises the following steps:
1. a special input quantity named 'input power enable' is set in a core unit of a terminal of a power distribution station
2. If the 'on power supply enable' on-off input quantity is not electrified, the core unit of the power distribution station terminal does not process the on-off signal, all the on-off input quantities are in initial states (namely, separate positions), and even if the external equipment has on-off state changes, the power distribution station terminal does not record
3. When the core unit of the terminal of the power distribution station is electrified and works normally, the program of the core unit can detect the state of the 'open power supply enabling' open input amount in real time, when the open input amount is electrified and after internal fixed delay (ensuring that the open input amount is continuously electrified), the terminal of the power distribution station is in a closed state through the 'open power supply enabling', the external open power supply is judged to be normal, the program opens the state acquisition function of other common open input amounts, and at the moment, the external open signal of the external equipment accessed to the terminal of the power distribution station can be normally acquired
4. Although the 'on power supply enable' is detected to be in the closed state, before the ordinary on-state is acquired in each time in the program, the 'on power supply enable' state is also judged in real time, and only if the on-state is in the closed state, the function of acquiring the ordinary on-state is continuously opened
5. The function of acquiring the input amount is that only the state of 'enabling the power supply to be switched on' needs to be judged for the first time, and once the 'enabling the power supply to be switched on' is detected to be in the closed state, all the input amount detection is real-time detection.
The invention has the beneficial effects that:
1. when the external input power supply is suddenly powered off, in the program, before the function of detecting the state of the common input power supply is operated, the state of 'enabling the power supply to be switched on' needs to be judged, so that the 'enabling the power supply to be switched on' is changed from the closed state to the separated state after the power supply is suddenly powered off, the program immediately locks the function of the state of the common input power supply, and thus, the original input power supply in the closed state can not generate separated displacement information
2. Because the program always detects the state of 'enabling the power supply', when the external input power supply is powered on again, the 'enabling the power supply' is switched on and switched off, the function of detecting the state of the common input is switched on again, the input originally in the closed state is switched on, and the program judges that the input is not shifted as long as the primary equipment is still in the closed state at the moment, so that the shift information is not generated. Therefore, the problem that the terminal of the power distribution station generates misreporting of displacement of the input quantity due to the on-off of the external input power supply is solved, and the state signal of the external equipment can be fed back truly.
Detailed Description
The present invention will be further described with reference to the following embodiments.
The invention comprises the following steps:
1. a special input quantity named 'input power enable' is set in a core unit of a terminal of a power distribution station
2. If the 'on power supply enable' on-off input quantity is not electrified, the core unit of the power distribution station terminal does not process the on-off signal, all the on-off input quantities are in initial states (namely, separate positions), and even if the external equipment has on-off state changes, the power distribution station terminal does not record
3. When the core unit of the terminal of the power distribution station is electrified and works normally, the program of the core unit can detect the state of the 'open power supply enabling' open input amount in real time, when the open input amount is electrified and after internal fixed delay (ensuring that the open input amount is continuously electrified), the terminal of the power distribution station is in a closed state through the 'open power supply enabling', the external open power supply is judged to be normal, the program opens the state acquisition function of other common open input amounts, and at the moment, the external open signal of the external equipment accessed to the terminal of the power distribution station can be normally acquired
4. Although the 'on power supply enable' is detected to be in the closed state, before the ordinary on-state is acquired in each time in the program, the 'on power supply enable' state is also judged in real time, and only if the on-state is in the closed state, the function of acquiring the ordinary on-state is continuously opened
5. The function of acquiring the input amount is that only the state of 'enabling the power supply to be switched on' needs to be judged for the first time, and once the 'enabling the power supply to be switched on' is detected to be in the closed state, all the input amount detection is real-time detection.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (3)
1. A power system relay protection method is characterized by comprising the following steps:
1) setting a special input quantity named as 'input power enable' in a core unit of a terminal of a power distribution station;
2) if the 'on power supply enable' on volume is not electrified, the core unit of the terminal of the power distribution station does not process an on signal, all the on volumes are in an initial state, and the terminal of the power distribution station cannot record even if the external equipment has on-off state change;
3) when the core unit of the terminal of the power distribution station is electrified and works normally, the program of the core unit can detect the state of the 'open power supply enabling' open input amount in real time, when the open input amount is electrified and after internal fixed delay, the terminal of the power distribution station is in a closed state through the open power supply enabling, the external open power supply is judged to be normal, the program opens the state acquisition function of other common open input amounts, and the external open signal of the external equipment accessed to the terminal of the power distribution station is normally acquired.
2. The power system relay protection method according to claim 1, wherein: before the state of the common input amount is acquired in the program each time, the state of the 'enabling of the input power supply' is also judged in real time, and the function of acquiring the state of the common input amount can be continuously opened only if the input amount is in a closed state.
3. The power system relay protection method according to claim 1, wherein: the function of acquiring the input amount is that only the state of 'enabling the power supply to be switched on' needs to be judged for the first time, and all input amount detection is real-time detection once the 'enabling the power supply to be switched on' is detected to be in the closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423971.6A CN111224371A (en) | 2019-12-31 | 2019-12-31 | Relay protection method for power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423971.6A CN111224371A (en) | 2019-12-31 | 2019-12-31 | Relay protection method for power system |
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| Publication Number | Publication Date |
|---|---|
| CN111224371A true CN111224371A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911423971.6A Pending CN111224371A (en) | 2019-12-31 | 2019-12-31 | Relay protection method for power system |
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| CN (1) | CN111224371A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769642A (en) * | 2020-07-03 | 2020-10-13 | 积成软件有限公司 | Processing method for preventing mistaken development of incoming telecommand deflection information during power failure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617664A (en) * | 2014-06-24 | 2015-05-13 | 许继电气股份有限公司 | Method for switching double intelligent terminal device remote communication quantity in intelligent substation |
| US20160360597A1 (en) * | 2015-06-02 | 2016-12-08 | Gg Tech Products Co., Limited | System and apparatus for selectively interrupting the power supply of lighting elements |
-
2019
- 2019-12-31 CN CN201911423971.6A patent/CN111224371A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617664A (en) * | 2014-06-24 | 2015-05-13 | 许继电气股份有限公司 | Method for switching double intelligent terminal device remote communication quantity in intelligent substation |
| US20160360597A1 (en) * | 2015-06-02 | 2016-12-08 | Gg Tech Products Co., Limited | System and apparatus for selectively interrupting the power supply of lighting elements |
Non-Patent Citations (1)
| Title |
|---|
| 王风光等: "就地化母线保护在电力系统中的应用", 《电力系统保护与控制》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769642A (en) * | 2020-07-03 | 2020-10-13 | 积成软件有限公司 | Processing method for preventing mistaken development of incoming telecommand deflection information during power failure |
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Application publication date: 20200602 |
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