CN102983623B - Emergency power supply auto switch over intertripping load method - Google Patents
Emergency power supply auto switch over intertripping load method Download PDFInfo
- Publication number
- CN102983623B CN102983623B CN201110278614.2A CN201110278614A CN102983623B CN 102983623 B CN102983623 B CN 102983623B CN 201110278614 A CN201110278614 A CN 201110278614A CN 102983623 B CN102983623 B CN 102983623B
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- Prior art keywords
- circuit
- power supply
- priority
- stand
- load
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Classifications
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses an emergency power supply auto switch over intertripping load method. By means of current memory modules of circuits, loop record of currents of various circuits on the condition of normal operation is achieved. The currents of the various circuits in the normal operation are memorized. When a main power supply losses power, a scheme needing least circuits to be tripped is determined according to the currents memorized before failure of the circuits and obtained through the current memory modules, the preset priority level of tripped circuits and the volume of an emergency power supply, the circuit needing to be tripped is tripped at first, and then the emergency power supply is switched over. The emergency power supply auto switch over intertripping load method is applied to a substation automatic system, and has the advantages of achieving intelligent self-adaption type emergency power supply auto switch over intertripping load, really achieving the fact that the circuits needing to be cut off are cut off, and guaranteeing the minimum power failure range after emergency power supply auto switch over.
Description
Technical field
The present invention relates to electric substation automation system, especially the method for automatic closing connection cutting load.
Background technology
Automatic closing automatics is widely used at present in electric substation automation system.Connection cutting load is the important step in automatic closing process.
The scheme of the connection cutting load generally adopted at present first pre-set needs is joined a switch tripping of cutting, and then drops into stand-by power supply.On this basis, then add 1 ~ 3 section of overload off-load, transship to prevent stand-by power supply.
Mainly there is following shortcoming in the program:
Lack flexibility: do not consider line load actual conditions, and carry out mechanized operation, in some cases, do not need to excise preassigned whole load, can drop into stand-by power supply, conventional method is only considered to excise the load preset, and causes unnecessary power failure;
Poor efficiency: under some occasion, some are predetermined to be and join the circuit cut and must ensure power supply for a certain reason, if so traditional method still will realize automatic closing, the configuration revising connection cutting load can only being gone to reflect the change of line properties by revising hard wired method, wasting time and energy.
Summary of the invention
The object of the invention is: in order to overcome the poor efficiency of traditional standby power switchover scheme, inflexible defect, propose a kind of automatic closing connection cutting load method, line current is remembered in the process that the method is normally run in system, determine to join the scheme of cutting minimum circuit according to the capacity of the electric current before each line fault and stand-by power supply after fault, and can prevent selected switch sections fail timely tripping and cause stand-by power supply overload.
Technical scheme of the present invention is: the method for automatic closing connection cutting load, by the electric current memory module of circuit, and the electric current of cycle index each circuit under normal operating conditions; Each line current when memory system is normally run; When main power source dead electricity, the priority of each circuit tripping that the electric current remembered before obtaining each line fault according to each circuit memory module, basis are preset and stand-by power supply capacity determine to need the scheme of the minimum circuit of tripping, first tripping needs the circuit of tripping, and then drops into stand-by power supply.
Be provided with overload off-load module: after automatic closing enters, detect stand-by power supply and whether transship, if overload, then the inessential circuit of cut-out.
As shown in Figure 1, the determining step of this method is:
(1) line current memory module: cycle index under normal operating conditions, the electric current of each circuit.
(2) the routine calculation module needing tripping is determined: the electric current of each circuit and the priority of default each circuit tripping under the normal running (operation) conditions according to stand-by power supply capacity, memory, need the circuit of tripping before determining in-put of spare power supply.
(3) whether overload off-load module: after automatic closing enters, detect stand-by power supply and transship, if overload, then and the inessential circuit of cut-out.
In automatic closing process, when intelligent computation goes out to ensure stand-by power supply nonoverload, the optimal case of the minimum circuit of required excision; The priority of circuit excision can be arranged flexibly in system normal course of operation, and supports the circuit that must excise and the circuit setting that must retain.The circuit that a tripping is selected, and then drop into stand-by power supply.On this basis, add 1 section longer time limit overload off-load, with prevent selected switch sections fail timely tripping and cause stand-by power supply overload.
Beneficial effect of the present invention is: when main power source dead electricity, and the capacity according to the electric current before each line fault and stand-by power supply determines to join the scheme of cutting minimum circuit,
(1) do not need to change the connection jumping order that wiring can change each circuit;
(2) do not need change wiring certain circuit can be added connection to jump sequence or get rid of this circuit in connection jump process;
Really accomplish needing to cut how many circuits just excises how many circuits, after ensureing automatic closing, power failure range minimizes.
Accompanying drawing explanation
Fig. 1 is the logic diagram of automatic closing connection cutting load.
Embodiment
1) after determining automatic closing, the capacity of stand-by power supply is Ih;
2) each circuit is put on priority according to importance, the circuit priority that must excise is 999, must reserved line priority be 1, between priority 2 ~ 998 numerical priority value larger, preferentially excised, priority can be arranged according to dispatch command flexibly by operations staff;
3), after fault occurs, scan all circuits, determine that fault preload total capacity is If0;
4) scan all circuits successively, if certain circuit priority is 999, load is I, then put the excision of this circuit and be labeled as "True", load total capacity If
0deduct the capacity (If=If of this load
0– I), until all line scannings are complete;
5) if now Ih > If, or there is no the circuit that can excise, then differentiated end;
6) if Ih < is If, then scan the circuit that all excisions are labeled as "false", find the circuit that numerical priority value is maximum, put the excision of this circuit and be labeled as "True", load total capacity If deducts the load capacity of this circuit;
7) 5 are gone to step.
Claims (1)
1. the method for automatic closing connection cutting load, is characterized in that: by the electric current memory module of circuit, the electric current of cycle index each circuit under normal operating conditions; Each line current when memory system is normally run; When main power source dead electricity, the priority of each circuit tripping that the electric current remembered before obtaining each line fault according to each circuit memory module, basis are preset and stand-by power supply capacity determine to need the scheme of the minimum circuit of tripping, first tripping needs the circuit of tripping, and then drops into stand-by power supply;
Before in-put of spare power supply, whether transship after anticipation stand-by power supply directly drops into, if overload, the then inessential circuit of cut-out in advance;
After in-put of spare power supply, automatically drop into one section of overload off-load, whether automatic decision stand-by power supply transships, and then excises the most unessential load make stand-by power supply safe operation as overload;
And carry out automatic closing connection cutting load flow process with following steps:
1) capacity presetting stand-by power supply is Ih;
2) each circuit is put on priority according to importance, the circuit priority that must excise is 999, and must reserved line priority be 1, the numerical priority value between priority 2 ~ 998 be larger, preferentially excised, priority is arranged according to dispatch command flexibly by operations staff;
3) running current of each circuit of electric current memory module record of circuit when normally running;
3), after fault occurs, scan all loads, determine that fault preload total capacity is If
0;
4) scan all loads successively, first calculate the total current that all priority is the circuit of 999, from If
0middle deduction, marking all priority is that the excision of the circuit of 999 is labeled as "True", and after implementing, total load is If;
5) if now If is still greater than Ih, then according to the order from high to low of excision priority, the excision of execution flag circuit is labeled as "True" and the operation of electric current before deduct line fault from If, until If<Ih or all circuit complete resections successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278614.2A CN102983623B (en) | 2011-09-20 | 2011-09-20 | Emergency power supply auto switch over intertripping load method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278614.2A CN102983623B (en) | 2011-09-20 | 2011-09-20 | Emergency power supply auto switch over intertripping load method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102983623A CN102983623A (en) | 2013-03-20 |
| CN102983623B true CN102983623B (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110278614.2A Expired - Fee Related CN102983623B (en) | 2011-09-20 | 2011-09-20 | Emergency power supply auto switch over intertripping load method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633730A (en) * | 2013-11-05 | 2014-03-12 | 国家电网公司 | Standby power supply automatic input system and method with inter-tripped loads |
| CN103997117B (en) * | 2014-06-10 | 2015-12-02 | 国家电网公司 | Intelligent joint cutting load backup auto-activating device |
| US10483792B2 (en) * | 2016-11-04 | 2019-11-19 | Fisher Controls International Llc | Methods and apparatus to prevent a false trigger of a shutdown function of a process control component |
| CN109167355B (en) * | 2018-10-12 | 2020-12-04 | 南京千智电气科技有限公司 | Load group control method and device |
| CN110854993A (en) * | 2019-12-16 | 2020-02-28 | 国网辽宁省电力有限公司鞍山供电公司 | Control method of automatic switching device of bus standby power supply |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951016A (en) * | 2010-04-22 | 2011-01-19 | 广东电网公司 | Wide area information-based automatic standby power supply switching adaptive modeling and controlling method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002186198A (en) * | 2000-12-12 | 2002-06-28 | Nec Corp | Power failure detecting method and uninterruptible power supply unit |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951016A (en) * | 2010-04-22 | 2011-01-19 | 广东电网公司 | Wide area information-based automatic standby power supply switching adaptive modeling and controlling method |
Non-Patent Citations (2)
| Title |
|---|
| 冯玲.防止备自投装置动作过负荷方案的实践.《华北电力技术》.2006,(第8期),第19-20页. * |
| 地区电网广域备自投控制系统研制;余涛等;《电力自动化设备》;20110331;第31卷(第3期);第122-123页 * |
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| CN102983623A (en) | 2013-03-20 |
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