CN104076247A - Power frequency power communication failure detecting method - Google Patents
Power frequency power communication failure detecting method Download PDFInfo
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- CN104076247A CN104076247A CN201410308492.0A CN201410308492A CN104076247A CN 104076247 A CN104076247 A CN 104076247A CN 201410308492 A CN201410308492 A CN 201410308492A CN 104076247 A CN104076247 A CN 104076247A
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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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a power frequency power communication failure detecting method which comprises the following steps that (1) systemic failures are classified, and according to equipment types, the failures are divided into following types; (2) a failure diagnosis inference model is used, and a network structure analysis inference model is used; (3) failure features are selected; and (4) a failure diagnosis process is subjected to inference. A network result analysis inference model is used for judging whether a system is in separation, then a fuzzy qualitative reasoning model is used for judging whether a power grid is unstable, a failure judging method based on multi-factor fuzzy qualitative reasoning is provided, the basic idea is that the feature phenomena of each kind of failures are various, the feature phenomena of different failures are surely different, and system features such as failure alarming data, system frequency, bus voltage, changing of power station power and tie line power factors are used for judging the fact that system failures belong to the types of system oscillation failures, system frequency collapse failures, system voltage collapse failures and minor failures respectively.
Description
Technical field
The present invention relates to field of power, specifically refer to a kind of power frequency communication fault detection method.
Background technology
Modern power systems is in service, and electric system large area blackout is the problem that need to attract great attention.In the last few years, electric system both at home and abroad, because repeatedly large area blackout once occurred stability disruption, caused very big infringement to national economy, and society and people's lives are greatly affected.The operation of assurance power system safety and stability, prevents that large area blackout from being the urgent and great task that modern power systems faces.On the other hand, once electric system has an accident, how Bian gets correct effective measures and dwindles as much as possible power failure range, shortens power off time, restores electricity early, becomes the problem of and prevention power system accident no less important.
It is an extremely complicated Real-time Decision process that power system accident is processed, and has many probabilistic factors.Expert system is for the approach likely that provides is provided, thisly take domain-specialist knowledge and experience and as basis, carry out the computer software of problem solving, there are very large potentiality solving aspect complicated, uncertain information processing and decision problem.Fushun electrical network network reconfiguration demand analysis.
After on-the-spot telemechanical apparatus action, both to concentrator station, transmit information, also to CC-2000 system, transmitted information simultaneously.Current C C-2000 system is received after failure message, does not do the further processing of network reconfiguration aspect, does not also possess to the function of relevant control device sending controling instruction.
For the fault occurring in system, need to judge fast and accurately, this just need to make a classification to the various faults that occur in system, this feature that just need to select certain general character according to the feature of fault is divided into a class, thereby makes more easily to realize when doing fault diagnosis algorithm.
Summary of the invention
The object of the invention is to overcome blindness drillhole blasting in stress relief process in the past and the deficiency of stress relief weak effect, provide a kind of possess counter stress concentrate position prediction accurately, stress relieving puts, removes effect detection reliable results, with strong points and simple and practical, workable and effective strong rock burst tunnel micro seismic monitoring and the stress relieving construction method of rock burst control in place.
The present invention is achieved through the following technical solutions: a kind of power frequency communication fault detection method, comprises the following steps:
(1) systematic failure is classified, according to device type, fault is divided into following classification;
(2) inference pattern of fault diagnosis, Crosslinking Structural inference pattern;
(3) select fault signature;
(4) reasoning fault diagnosis flow scheme.
Further, described in described step (1), fault category comprises, main transformer fault, bus-bar fault, fault of interconnected transmission line, and power plant failure.
Further, in described step (3), can select fault signature to comprise variation and the interconnection power factor of fault alarm data, system frequency, busbar voltage, generating plant power.
Further, described main transformer fault is, main transformer has standby fault-B1 type, two or two days above main transformers side by side, when dividing or having standby operation, there is tripping operation fault in an operation main transformer wherein; First consider that station internal loading switches, utilize backup auto-activating device, the original load switching of fault main transformer is arrived to other main transformers; If switch unsuccessfully, by interconnection, utilize other one time power transformation source bands all or part of load of main transformer that is out of order; Main transformer is without standby fault-B2 type, because of high voltage bus dead electricity or other reasons, causes the transforming plant main transformer fault that all trips; By interconnection, utilize other once just Power supply belt all or part of loads of main transformer that is out of order.
Further, described 2 bus-bar faults are, bus has standby fault-Ml type, during the other female operation of two mothers or two master tape, and a bus-bar fault wherein; First consider to utilize backup auto-activating device, the original load switching of fault bus is arrived to other buses; If switch unsuccessful, just by interconnection utilize other once the Power supply belt bus that is out of order load in whole or in part; Bus is without standby fault-M2 type, and all buses of transformer station break down simultaneously; By interconnection, utilize other one time power transformation sources to take all or part of load of fault bus out of; While thering is the female operation of transformer station's list of many buses, if operation bus breaks down, belong to nothing for fault.
Further, described fault of interconnected transmission line is, interconnection has standby fault-L1 type, and two or two above interconnections are side by side or while having received shipment capable, wherein tripping operation fault occurs an interconnection; First consider that line-to-line load but changes, can utilize backup auto-activating device, by the original load switching of faulty line to extension wire; If switch unsuccessfully, by distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of; Interconnection is without standby fault-L2 type, the fault that simultaneously trips of all interconnections between two transformer stations; By distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of.
Further, power plant failure is, power plant failure-PP type, and generating plant generation catastrophic failure, with grid disconnection; Utilize backup auto-activating device, or utilize other one time power transformation sources to take all or part of load of losing because of power plant failure out of by interconnection, be thought of as power plant's power transmission simultaneously.
The present invention compared with prior art, the advantage having and beneficial effect are: first propose to judge whether off-the-line of system with network interpretation of result inference pattern, then propose to judge whether unstability of electrical network with fuzzy qualitative inference model, in the time of can not using two kinds of way judgement system failures in system, just need a kind of new way to judge electric network fault, propose a kind of fault judgment method based on multifactor fuzzy qualitative reasoning, its basic ideas are: the characteristic phenomenon of every kind of fault is many aspects; The characteristic phenomenon of different faults certainly can be completely unidentical.
By system features judgement system failures such as the variation of fault alarm data, system frequency, busbar voltage, generating plant power, interconnection power factors, belong to system oscillation fault, system frequency collapse fault, system voltage collapse fault, generic failure type.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this, without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacements and change, all should comprise within the scope of the invention.
Embodiment:
The present embodiment discloses a kind of power frequency communication fault detection method, and fault can be divided into main transformer fault, bus-bar fault, fault of interconnected transmission line, power plant failure according to device type.According to spare condition can be divided into have standby and without standby.The power supply strategy that has standby fault is first to utilize standby throwing device to carry out localised load switching; If switch unsuccessfully, by interconnection, utilize other power supplys to take all or part of fault out of and load.Without standby fault power supply strategy, be to utilize other power supplys to take all or part of load because of fault loss out of by interconnection.
The classification of 1 systematic failure
Generic failure, oscillation fault, collapse of frequency, collapse of voltage, system break-down.Generic failure is exactly the unlikely local fault that causes large-area power-cuts, common corresponding individual equipment fault.To this type of fault, adopt conventional numerical method, as security-constrained dispatch, optimal load flow etc., can determine safety correction countermeasure.In the corresponding schedule regulation of other faults, require Bian to get emergency measures, as pulling load, emergency stop, system sectionalizing etc., avoid the systemic catastrophic failure of long-time large-area power-cuts as far as possible.
Main transformer has standby fault (B1 type): two or more main transformers side by side, apportion or while having standby operation, wherein tripping operation fault occurs an operation main transformer.First consider that station internal loading switches (during paired running, naturally switching), can utilize backup auto-activating device, the original load switching of fault main transformer is arrived to other main transformers.If switch unsuccessful (may because backup auto-activating device not enable or haul oneself willingly into failure, transformer overload etc.), by interconnection, utilize other one time power transformation source bands all or part of load of main transformer that is out of order.
Main transformer is without standby fault (B2 type): because of high pressure (220kV) bus dead electricity or other reasons, cause the transforming plant main transformer fault that all trips.By interconnection, utilize other one time power transformation source bands all or part of load of main transformer that is out of order.
Bus has standby fault (Ml type): during the other female operation of two mothers (containing single mother partition) or two master tape, and a bus-bar fault wherein.First consider to utilize backup auto-activating device, the original load switching of fault bus is arrived to other buses.If switch unsuccessfully, by interconnection, utilize other one time power transformation sources to take all or part of load of fault bus out of.
Bus is without standby fault (M2 type): all buses of transformer station break down simultaneously.By interconnection, utilize other one time power transformation sources to take all or part of load of fault bus out of.While thering is transformer station single female operation of many buses (other buses may in inspecting state), if operation bus breaks down, obviously belong to without standby fault.
Interconnection has standby fault (L1 type): two or more interconnection side by side or while having standby operation, wherein tripping operation fault occurs an interconnection.First consider that line-to-line load switches (switching naturally during paired running), can utilize backup auto-activating device, by the original load switching of faulty line to extension wire.If switch unsuccessfully, by distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of.
Interconnection is without standby fault (L2 type fault): the fault that simultaneously trips of all interconnections between two transformer stations.By distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of.
Power plant failure (PP type fault): generating plant generation catastrophic failure, with grid disconnection.Utilize backup auto-activating device, or utilize other one time power transformation sources to take all or part of load of losing because of power plant failure out of by interconnection, be thought of as power plant's power transmission simultaneously.
The inference pattern of 2 fault diagnosises
Crosslinking Structural inference pattern.Crosslinking Structural system sectionalizing evaluation algorithm based on parallel breadth-first search, basic ideas: each is cut-off to circuit, from the plant stand of both sides, the circuit search opposite end plant stand that is successively alternately "on" position to both sides, outer switch.If two-sided search is to same plant stand, system does not have off-the-line; Otherwise, if any side can not expand new connection plant stand, system generation off-the-line again.
Fuzzy qualitative inference model.Application expert system judges that electrical network unstability fault mainly contains three aspects: difficulty: whether (1) can not directly utilize numerical result and device fault information inference system to lose stable; (2) real time data and warning information are described grid failure state and are had uncertainty; (3) yardman's fault judgemental knowledge and experience are fuzzy, uncertain often, generally can not apply simple two-valued function rule and be described.
Above situation shows how to consider rightly the uncertain factor in observation evidence and knowledge experience, is the key issue of setting up electric network failure diagnosis system.For this reason, propose a kind of fault judgment method based on multifactor fuzzy qualitative reasoning, its basic ideas are: the characteristic phenomenon of every kind of fault is many aspects; The characteristic phenomenon of different faults certainly can be completely unidentical.
The selection of 3 fault signatures
Available feature has: the variation of fault alarm data, system frequency, busbar voltage, generating plant power, interconnection power factor etc.The feature of oscillation fault is mainly manifested in four aspects: (1) system frequency is obviously different; (2) each point voltage cycle swings; (3) generating plant and interconnection power significantly swing; (4) interconnection power factor cyclic fluctuation.During collapse of frequency fault, all there is extremely low frequency in each frequency monitoring point, therefore easily diagnosis.During collapse of voltage, region substation bus bar voltage is lower than lowest limit working voltage, will consider to get rid of to occur the too low erroneous judgement causing of short time voltage because of system oscillation during diagnosis.If main grid structure structural integrity, and system frequency, voltage all, in the accident limit, are diagnosed as generic failure.
4 fault diagnosis reasoning flow processs
Fault diagnosis reasoning flow process, when system breaks down warning, program is done two kinds of processing to fault alarm, the first is when having branch road to disconnect, adopt the principle of parallel breadth-first search to judge the state of system, if system sectionalizing just forms off-the-line plant stand table, then Bian controls system with recovering control measure, if system is got back to intelligent alarm without off-the-line, processes; It two is when having off-limit alarm, updating system state, judge that whether system is to the cycle, if the cycle that is less than is returned to intelligent alarm and processes, if just system is done to fuzzy qualitative reasoning to the cycle, judge whether generation systems fault of system, as do not have generation systems fault just to return to intelligent alarm to process, as generation systems fault, just take emergency control measure system is recovered to control.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, within all falling into protection scope of the present invention.
Claims (7)
1. a power frequency communication fault detection method, is characterized in that: comprise the following steps:
(1) systematic failure is classified, according to device type, fault is divided into following classification;
(2) inference pattern of fault diagnosis, Crosslinking Structural inference pattern;
(3) select fault signature;
(4) reasoning fault diagnosis flow scheme.
2. a kind of power frequency communication fault detection method according to claim 1, is characterized in that: described in described step (1), fault category comprises, main transformer fault, bus-bar fault, fault of interconnected transmission line, and power plant failure.
3. a kind of power frequency communication fault detection method according to claim 1, it is characterized in that: in described step (3), can select fault signature to comprise variation and the interconnection power factor of fault alarm data, system frequency, busbar voltage, generating plant power.
4. a kind of power frequency communication fault detection method according to claim 2, is characterized in that: described main transformer fault is that main transformer has standby fault
-B1type, the above main transformer in two or two days side by side, when dividing or having standby operation, there is tripping operation fault in an operation main transformer wherein; First consider that station internal loading switches, utilize backup auto-activating device, the original load switching of fault main transformer is arrived to other main transformers; If switch unsuccessfully, by interconnection, utilize other one time power transformation source bands all or part of load of main transformer that is out of order; Main transformer is without standby fault
-B2type, because of high voltage bus dead electricity or other reasons, causes the transforming plant main transformer fault that all trips; By interconnection, utilize other once just Power supply belt all or part of loads of main transformer that is out of order.
5. a kind of power frequency communication fault detection method according to claim 2, is characterized in that: described bus-bar fault is, bus has standby fault-Ml type, during the other female operation of two mothers or two master tape, and a bus-bar fault wherein; First consider to utilize backup auto-activating device, the original load switching of fault bus is arrived to other buses; If switch unsuccessful, just by interconnection utilize other once the Power supply belt bus that is out of order load in whole or in part; Bus is without standby fault-M2 type, and all buses of transformer station break down simultaneously; By interconnection, utilize other one time power transformation sources to take all or part of load of fault bus out of; While thering is the female operation of transformer station's list of many buses, if operation bus breaks down, belong to nothing for fault.
6. a kind of power frequency communication fault detection method according to claim 2, it is characterized in that: described fault of interconnected transmission line is, interconnection has standby fault-L1 type, and the above interconnection of two or two side by side or while having received shipment capable, wherein tripping operation fault occurs an interconnection; First consider that line-to-line load but changes, can utilize backup auto-activating device, by the original load switching of faulty line to extension wire; If switch unsuccessfully, by distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of; Interconnection is without standby fault-L2 type, the fault that simultaneously trips of all interconnections between two transformer stations; By distant place interconnection, utilize other one time power transformation sources to take all or part of load of losing because of fault of interconnected transmission line out of.
7. a kind of power frequency communication fault detection method according to claim 2, is characterized in that: power plant failure is, power plant failure-PP type, and generating plant generation catastrophic failure, with grid disconnection; Utilize backup auto-activating device, or utilize other one time power transformation sources to take all or part of load of losing because of power plant failure out of by interconnection, be thought of as power plant's power transmission simultaneously.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105553515A (en) * | 2015-12-11 | 2016-05-04 | 广东电网有限责任公司茂名供电局 | Method and system for in-district transformer low voltage side communication |
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| CN102243280A (en) * | 2011-05-16 | 2011-11-16 | 中国电力科学研究院 | FDIR (fault detection, isolation and reconfiguration)-based fault diagnosis method for power system |
| KR20120020835A (en) * | 2010-08-31 | 2012-03-08 | 서울대학교산학협력단 | Fault detector and detecting method for attitude control system of spacecaft |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6766230B1 (en) * | 2000-11-09 | 2004-07-20 | The Ohio State University | Model-based fault detection and isolation system and method |
| KR20120020835A (en) * | 2010-08-31 | 2012-03-08 | 서울대학교산학협력단 | Fault detector and detecting method for attitude control system of spacecaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105553515A (en) * | 2015-12-11 | 2016-05-04 | 广东电网有限责任公司茂名供电局 | Method and system for in-district transformer low voltage side communication |
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Application publication date: 20141001 |