CN107332199B - A kind of relay protection movement intelligent evaluation method based on Multi-level information fusion - Google Patents
A kind of relay protection movement intelligent evaluation method based on Multi-level information fusion Download PDFInfo
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- CN107332199B CN107332199B CN201710691442.9A CN201710691442A CN107332199B CN 107332199 B CN107332199 B CN 107332199B CN 201710691442 A CN201710691442 A CN 201710691442A CN 107332199 B CN107332199 B CN 107332199B
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- 230000004224 protection Effects 0.000 title claims abstract description 463
- 238000011156 evaluation Methods 0.000 title claims abstract description 38
- 230000004927 fusion Effects 0.000 title claims abstract description 31
- 238000004458 analytical method Methods 0.000 claims abstract description 70
- 230000009471 action Effects 0.000 claims abstract description 54
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims description 26
- 230000001681 protective effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 239000000284 extract Substances 0.000 claims description 17
- 230000004069 differentiation Effects 0.000 claims description 16
- 238000005204 segregation Methods 0.000 claims description 15
- 230000004044 response Effects 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 10
- 230000000977 initiatory effect Effects 0.000 claims description 7
- 230000007257 malfunction Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000000819 phase cycle Methods 0.000 claims description 4
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- 230000009466 transformation Effects 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 description 14
- 230000004888 barrier function Effects 0.000 description 3
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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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Abstract
The invention discloses a kind of relay protections based on Multi-level information fusion to act intelligent evaluation method; after obtaining tripping information; classification obtains information from power grid; tripping interval secondary information analysis, the primary information analysis of tripping interval, domain information of standing analysis and Wide-area Measurement Information analysis are carried out respectively; according to extracted fault characteristic value information at different levels and pass through the judging result of various criterions; Multi-level information is merged; protection act behavior correctness is judged, and finally provides the correct action assessment result of protection.The present invention reduces the dependences to single piece of information source, improve fault-tolerance, and deagnostic structure has higher accuracy and reliability.
Description
Technical field
The present invention relates to a kind of relay protections based on Multi-level information fusion to act intelligent evaluation method.
Background technique
For guarantee electric system operation stability and power supply reliability, when power grid occur disturbance and failure, protective device
When generation movement is by failure removal, needs quickly to diagnose to whether breaking down in tripping origination interval, protection is filled
The correctness for setting movement is judged.Intellectual analysis is carried out using operation of the Multi-level information fusion to protection, can be made full use of
Other interval failures in one secondary failure characteristic quantity information of this side substation at protection act interval and opposite side substation, domain of standing
Characteristic quantity information, wide area fault characteristic value information multi-angle to tripping interval whether break down and the correctness of protection act into
Row comprehensive analysis.The result of protection operation intellectual analysis may further be as the auxiliary information of the maintenance of primary equipment, quickly
Restore the power supply of power supply interrupted district, reduces the influence to system stability.Traditional protection operating analysis method primarily rests on event
On the basis of barrier diagnosis, event in power loss region is carried out according to the protection act situation under relay protection scheme situation and fault condition
The diagnosis for hindering element carries out the differentiation of protection act correctness by the fault element that diagnosis obtains.But in the reality of electric system
In the situation of border, some situations cannot obtain multiterminal information required for diagnosing after failure occurs, and exist simultaneously lacking for information needed
Situations such as mistake is failed to report, in the case where information content cannot obtain satisfaction, be just difficult carry out fault diagnosis and to the operation of protection into
Market condition is analyzed.
The fault diagnosis based on power grid multiple spot on the basis of fault diagnosis is established in existing electric network protection operating analysis more
Information determines fault zone, and diagnoses to fault element that the operating condition that further analysis is protected, this is in information needed
Source can satisfy the needs of algorithm in the case where not lacking.But it can often be obtained because of various information data sources in engineer application
In go wrong, information loses the demand of the reasons without being able to satisfy Fault diagnosing and protecting operating analysis such as serious.Using multiple spot
Fault message carries out electric network failure diagnosis and analyze to protection operation to be difficult to take into account various complex situations, diagnostic analysis method
Fault-tolerance it is poor, not can guarantee the accuracy and reliability of result.
Summary of the invention
The present invention to solve the above-mentioned problems, propose it is a kind of based on Multi-level information fusion relay protection movement intelligence comment
Estimate method, present invention obviates carry out protection operating condition point again after carrying out fault diagnosis first with power grid multipoint fault information
The conventional thought of analysis is analyzed since a secondary information at protection act interval, and will be arrived at a station using Information expansion domain and wide area,
The information that every grade is obtained carries out analysis of control, and whether the movement for verifying protection meets the condition correctly acted, the method for the present invention
Reduce the dependence to single piece of information source, improve fault-tolerance, deagnostic structure has higher accuracy and reliability.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of relay protection movement intelligent evaluation method based on Multi-level information fusion, after obtaining tripping information, from power grid
Middle classification obtains information, carries out tripping interval secondary information analysis, the primary information analysis of tripping interval, domain information of standing analysis respectively
It is analyzed with Wide-area Measurement Information, according to extracted fault characteristic value information at different levels and by the judging result of various criterions, to multistage
Information is merged, and is judged protection act behavior correctness, and finally provides the correct action assessment result of protection.
Further, the specific method of tripping interval secondary information analysis is, according to the action situation of SOE system, to determine
The secondary information for extracting this side substation and opposite side substation that tripping interval occurs, including route movement are collected in movement interval
It is spaced our station and each set route protection and breaker protection act information to station；Each set electrical quantity at transformer action interval is protected
The action message of shield, non-ionizing energy loss and breaker protection；More set main protections at bus movement interval and moving for breaker protection
Make information；The warning information for extracting protective device is collected, between the movement interval secondary information based on all collections is to tripping
Every interior two sets or the action consistency of more set protections carries out analysis and distinguishing.
Further, the differentiation for carrying out tripping interval type is cut off according to the type of protection act and breaker actuation
Equipment, judgement is that movement occurred at intervals in line segregation, transformer or station domain bus acts；According to the movement judged
Component type, the our station that extraction movement occurs and the protection alarm information to station；Occurred by protection information system acquisition movement
Whether there is the warning information of protective device in for the previous period, whether is located according to the protective device warning information judgment means of acquisition
In normal operating condition, if there is protective device main protection alarm locking information, protective device is alerted into locking information and is carried out most
Whole fusion rules.
Further, interval primary information analysis is carried out method particularly includes: extract and tripping interval our station and battle occurs
Concentrate recorder data, from concentrate recorder data in extract interval primary information, including difference current, power direction, fault current,
False voltage, zero-sequence current, zero sequence direction or/and measurement impedance fault characteristic quantity, fault characteristic value and fixed value list are compared
Compared with whether judgement gained fault characteristic value is in actuating range.
Further, station domain information analysis is carried out method particularly includes: substation and opposite side power transformation where judgement tripping interval
Whether the protection at other intervals, failure wave-recording response message have starting in standing, and fault current, event are extracted in the case where there is starting
Hinder voltage and zero sequence direction fault characteristic value, determines whether the fault characteristic value at station other intervals of domain meets wanting for protection act
It asks.
Further, the detailed process of Wide-area Measurement Information analysis is carried out are as follows: according to electricity grid network topological structure, search for upper level
Or whether the protection at other intervals of next stage plant stand, failure wave-recording response message have starting, utilize fault current, false voltage
The requirement for meeting tripping interval whether is assisted with zero sequence direction fault characteristic value.
In the differentiation of protection act consistency on messaging, there is the protective device of protection blocking warning information to be not involved in following guarantor
Consistency discrimination is protected, then directly skips following protection consistency discrimination when remaining consistency protection differentiates that protection is only a set of
Link.
Differentiate whether our station is consistent with to transmission line of electricity main protection, the action message of auxiliary protection in station protection information, sentences
Other formula are as follows:
F(AL)=AL1×AL2×AL3×ALf
A in formulaL1Based on a protection act information, AL2Based on two protection act information, AL3Based on three protection act information,
ALfTo assist protection act information, the protection act information A when corresponding protection actL=1, protection act letter when protection is failure to actuate
Cease AL=0, F (AL) it is that route protection action consistency differentiates as a result, working as F (ALWhen)=1, the movement of route protection consistency is indicated,
Otherwise it is acted for route protection inconsistency.
According to breaker protection act information ALdDetermine whether the protection of line segregation breaker acts.
Extract when transformer spacing movement includes main transformer A set, B set protection act information ATA、ATB, non-ionizing energy loss is dynamic
Make information ATF, breaker protection act information ATdProtection act information inside is protected when the movement of corresponding tranformer protection
Action message AT=1, protection act information A when protection is failure to actuateT=0；
Differentiate whether the action message of main transformer A, B set protection in transformer electrical quantity protection act information is consistent；Differentiate public
Formula are as follows:
F(AT)=ATA×ATB
A in formulaTAProtection act information, A are covered for main transformer ATBProtection act information, F (A are covered for main transformer BT) it is that transformer is electrical
Protection act consistency discrimination is measured as a result, working as F (ATWhen)=1, indication transformer electrical quantity protects consistency movement, is otherwise change
Depressor electrical quantity protects inconsistency movement.
Work as ATFWhen=1, indication transformer non-electric quantity protection act, otherwise non-electric quantity protection is failure to actuate.
According to transformer bay every breaker protection act information ATdDetermine whether transformer bay acts every breaker protection.
When judging movement for bus, extracting includes one protection act information A of bus masterB1, main two protection act information
AB2, breaker protection act information ABdProtection act information inside, the protection act information when the movement of corresponding bus protection
AB=1, protection act information A when protection is failure to actuateB=0.
Differentiate whether the action message of more set main protections in bus protection action message is consistent.
Discrimination formula are as follows:
F(AB)=AB1×AB2
A in formulaB1For one protection act information of bus master, AB2For two protection act information of bus master, F (AB) it is bus protection
Action consistency differentiates as a result, working as F (ABWhen)=1, indicates the movement of bus protection consistency, be otherwise bus protection inconsistency
Movement.
According to bus interval breaker protection act information ABdDetermine whether bus interval breaker acts.
According to the comparison of the action consistency of above-mentioned each protection act information and the differentiation that whether acts of breaker, in bus and
On route in the case of protection act, following four protection act classification is obtained according to differentiation result: the movement of protection consistency, open circuit
Device protection is failure to actuate；Protect consistency movement, breaker protection act；Protect inconsistency movement, breaker protection act；It protects
The movement of shield inconsistency, breaker protection are failure to actuate.
It is acted when being determined as bus, carries out the laggard inbound domain information analysis of protection act consistency discrimination；Work as differentiation
It is acted for route, enters interval primary information analysis after carrying out protection consistency discrimination.
In the case where transformer bay is acted every protection, according to the action consistency of electrical quantity main protection, non electrical quantity
Whether protection acts, and whether breaker protection acts, and obtains following several action classifications: the movement of electrical quantity main protection consistency,
Non-electric quantity protection act, breaker protection are failure to actuate；The movement of electrical quantity main protection consistency, is broken at non-electric quantity protection act
Road device protection act；The movement of electrical quantity main protection consistency, non-electric quantity protection are failure to actuate, breaker protection is failure to actuate；Electrically
Amount main protection consistency acts, non-electric quantity protection is failure to actuate, breaker protection act；Electrical quantity main protection inconsistency is dynamic
Work, the protection of non-electric quantity protection act, breaker are failure to actuate；The movement of electrical quantity main protection inconsistency, non-electric quantity protection are dynamic
Make, breaker protection act；The movement of electrical quantity main protection inconsistency, non-electric quantity protection are failure to actuate, breaker protection is motionless
Make；Electrical quantity main protection inconsistency acts, non-electric quantity protection is failure to actuate, breaker protection act.
It is acted when being determined as transformer, enters interval primary information analysis after carrying out protection act consistency discrimination.
In above-mentioned interval primary information analysis, in the case where protection act interval is determined in interval secondary information analysis,
The primary information analysis that protection act interval is carried out according to different protection act spacing cases, mainly becomes from our station and opposite side
Fault current, false voltage, zero-sequence current and zero sequence direction are extracted in fault set in power station in wave-record chart, and by obtaining
Fault current and information of voltage calculate failure measurement impedance, by obtaining the fault current meter in our station and opposite side substation
The differential current value at calculation movement interval.
When protection act interval is route, this side substation fault line voltage distribution U1 is extractedLf, fault current I1Lf, zero
Sequence electric current IM0, zero sequence direction f1L0, extract opposite side substation fault line voltage distribution U2Lf, fault current I2Lf, zero-sequence current IN0With
Zero sequence direction f2L0, differentiated so that whether this information progress protection act interval route breaks down, method of discrimination is as follows:
Line fault criterion 1: if there is protection act interval in wave-record chart in the fault set of this side and opposite side substation
There is apparent fluctuation in the voltage and current of route, carries out route survey impedance by the line fault voltage and fault current of two sides
Calculating fault point distance；
Line fault criterion 2: the zero sequence electricity for concentrating extraction two sides record in wave-record chart from this side and opposite side substation
Flow valuve and zero sequence direction judge line fault situation using zero-sequence current vector value；
Line fault criterion 3: the phase current vector for concentrating extraction two sides in wave-record chart from this side and opposite side substation
Value calculates phase current differential value and judges line fault situation；
In route failure criterion, the judgement that fault characteristic value information carries out three above line fault criterion is extracted, when
Occur then judging that line segregation is faulty when criterion is set up.
When judging that protection act interval is transformer in carrying out interval secondary information analysis, it is based on recording in fault set,
The electric current for extracting transformer height, neutralizing low-pressure side, specifically includes:
Transformer fault criterion 1: calculating transformer difference current determines when difference current is greater than difference current initiation value
Faulty based on transformer under recording transformer differential current criterion；
Transformer fault criterion 2: from the current value for extracting each side of transformer in fault set in recording, determine each side of transformer
Current value whether be greater than the setting valve of overcurrent protection and then judge that transformer is faulty if more than setting valve；
Transformer fault criterion 3: the non-ionizing energy loss action message of protection act interval protection equipment for transformer is extracted, is sentenced
The action situation of disconnected transformer non-electricity protection, when transformer non-electricity protection act, when simultaneous faults criterion 1 or 2 is set up, then
Determine that transformer is faulty.
In transformer fault differentiation, when meeting the either case in transformer fault criterion 1,2, it is judged as transformer
Be spaced it is faulty, criterion 3 set up when determine transformer non-electricity protection act it is correct.When getting criterion information, do not determine
Transformer bay is every, being then judged to being spaced fault-free in the event of failure out.
Carry out station domain information analysis when, when judge that protection act is bus in interval secondary information analysis, be based on
Lower criterion judge bus whether failure, bus-bar fault criterion: calculate bus differential electric current, when bus differential electric current be greater than differential electricity
When flowing initiation value, determine faulty based on failure wave-recording bus differential electric current criterion Down Highway, it is full when being determined as bus-bar fault
When sufficient bus-bar fault criterion, then judge that bus breaks down, when getting bus criterion, judges then to be judged as when bus fault-free
Bus fault-free goes to Multi-level information fusion, when bus criterion information has not been obtained, continues sentencing based on station domain information
It is disconnected.
The response message for analyzing the protection at other intervals of bus in this side and opposite side substation, failure wave-recording, judges that it is
It is no to have response, if wave recording device records, obtain the failures such as the fault current, false voltage, zero sequence direction at other intervals spy
Sign amount information, determines whether other intervals break down, and according to station domain bus wave-record chart carry out auxiliary judgement route and
Whether transformer bay in protection act interval every breaking down, if auxiliary judgement has bus and failure occurred at intervals in power transformation device,
Go to Multi-level information fusion.
Analyze Wide-area Measurement Information, according to network topology structure, obtain the connection of protection act interval substation upper level or
The protection at other intervals of next stage plant stand, failure wave-recording response message then obtain failure zero sequence, negative phase-sequence electricity if there is starting
Pressure and electric current determine whether other intervals break down under Wide-area Measurement Information, and are believed according to the fault characteristic value of wide area wave-record chart
Breath determines whether break down in protection act interval by zero sequence, the amplitude size distribution of negative phase-sequence characteristic quantity and directionality.
Route and bus determine that protection act evaluation result is as follows in the event of failure:
If protecting consistency movement, breaker protection is not operating, then the correct movement excision between-failures of protection；
If protecting consistency movement, breaker protection act, then the correct movement of protection, breaker tripping, breaker protection
Movement excision between-failures；
If protecting inconsistency movement, breaker protects not operating, then not operating main protection tripping, by the main guarantor acted
Shield movement excision between-failures；
If protecting inconsistency movement, breaker protection act, then not operating main protection tripping, there is the main protection of movement
Trip signal, breaker tripping are sent out, breaker protection act cuts off failure.
Line and transformer interval determines that protection act evaluation result is as follows when fault-free:
If protection is not operating, trip, is then determined as breaker malfunction；
If protection act, it is determined as false protection situation.
If movement interval is line segregation, and determines resistance algorithm not in line range according to line segregation primary information
It is interior, then according to ranging information and excessive resistance calculated case, determine whether circuit high resistant ground fault.
When protection act evaluation result is as follows in the event of failure every judgement for transformer bay:
If electrical quantity main protection consistency acts, breaker protection is not operating, then the correct movement excision between-failures of protection；
If electrical quantity main protection consistency acts, breaker protection act, then the correct movement of protection, breaker tripping are broken
Road device protection act cuts off between-failures；
If electrical quantity main protection inconsistency acts, breaker protects not operating, then not operating main protection tripping, by moving
The main protection movement excision between-failures of work；
If electrical quantity main protection inconsistency acts, breaker protection act, then not operating main protection tripping, there is movement
Main protection send out trip signal, breaker tripping, breaker protection act cut off failure.
When protection act evaluation result is as follows when determining fault-free for transformer bay:
If protection is not operating, trip, is then determined as breaker malfunction；
If being determined as false protection situation when electrical quantity protection or non-electric quantity protection act；
If non-electric quantity protection act, non-electric quantity false protection when being set up according to recording electrical quantity fault-free criterion
Make.
Compared with prior art, the invention has the benefit that
Present invention obviates carry out protection operating condition again after carrying out fault diagnosis first with power grid multipoint fault information
The conventional thought of analysis is analyzed since a secondary information at protection act interval, and the domain and wide of being arrived at a station using Information expansion
Domain, the information that every grade is obtained carry out analysis of control, and whether the movement for verifying protection meets the condition correctly acted；
The method of the present invention reduces the dependence to single piece of information source, improves fault-tolerance, and deagnostic structure has higher accurate
Property and reliability.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is present invention protection intelligent operation analysis process schematic diagram；
Fig. 2 is interval secondary information analysis flow diagram of the present invention；
Fig. 3 is present invention interval primary information analysis process schematic diagram.
Specific embodiment:
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, existing electric network protection operating analysis exists in the prior art and establishes in failure more
On the basis of diagnosis, based on the failure diagnosis information of power grid multiple spot, fault zone is determined, and diagnose to fault element, into
The operating condition of one step analysis protection, this can satisfy the needs of algorithm in the case where information needed source does not lack.But
It goes wrong in often being obtained because of various information data sources in engineer application, information loses the reasons such as serious without being able to satisfy event
The demand of barrier diagnosis and protection operating analysis.Electric network failure diagnosis is carried out using multipoint fault information and protection operation is divided
Analysis is difficult to take into account various complex situations, and the fault-tolerance of diagnostic analysis method is poor, not can guarantee the accuracy and reliability of result
Deficiency, in order to solve technical problem as above, the invention proposes it is a kind of based on Multi-level information fusion relay protection movement
Intelligent Evaluation method.This method is avoided carries out protection fortune first with after power grid multipoint fault information progress fault diagnosis again
The conventional thought of row situation analysis is analyzed since a secondary information at protection act interval, and will be arrived at a station using Information expansion
Domain and wide area, the information that every grade is obtained carry out analysis of control, and whether the movement for verifying protection meets the condition correctly acted, this
Inventive method reduces the dependence to single piece of information source, improves fault-tolerance, and deagnostic structure has higher accuracy and reliability.
Concrete scheme of the invention is as follows:
(1) interval secondary information analysis is carried out.According to the action situation of SOE system, determines movement interval, collect and extract hair
The secondary information of this side substation and opposite side substation at raw tripping interval acts interval our station including route and to more sets at station
Route protection, breaker protection act information；More set electrical quantity protections at transformer action interval, non-ionizing energy loss, breaker
The action message of protection；The action message that more set main protections at bus movement interval, breaker are protected；It collects and extracts protective device
Warning information.Based on the movement interval secondary information collected above, to occurring, tripping is spaced interior two sets or more set protections are moved
Make consistency and carries out analysis and distinguishing.
(2) interval primary information analysis is carried out.The concentration recorder data that tripping interval our station and battle occurs is extracted, from collection
Interval primary information, including difference current, power direction, fault current, false voltage, zero sequence electricity are extracted in middle recorder data
Fault characteristic value is compared by stream, zero sequence direction, the fault characteristic values such as measurement impedance with fixed value list, determines that gained failure is special
Whether sign amount is in actuating range.
(3) station domain information analysis is carried out.The guarantor at other intervals in substation where judgement tripping interval and opposite side substation
Whether shield, failure wave-recording response message have starting, extract fault current, false voltage, zero sequence direction in the case where there is starting
Equal fault characteristic values, determine whether the fault characteristic value at station other intervals of domain meets the requirement of protection act.
(4) Wide-area Measurement Information analysis is carried out.According to electricity grid network topological structure, other of upper level or next stage plant stand are searched for
Whether the protection at interval, failure wave-recording response message have starting, fault current, false voltage, the fault characteristic values such as zero sequence direction
Whether auxiliary meets the requirement that tripping is spaced.
(5) according to extracted fault characteristic value information in step (1) (2) (3) (4) and pass through the judgement knot of various criterions
Fruit merges Multi-level information, and output protection acts the result of intelligent Evaluation.
(6) according to the differentiation of the action situation of protective device and Multi-level information, output protection acts the result of intelligent Evaluation.
In the step (1), according to the action situation of SOE system, determine movement interval, extraction movement be spaced in our station and
The secondary information at station is analyzed.When occur protection act in system, trip condition occurs when, carry out the collection of action message
It extracts, row information of going forward side by side analysis.
The differentiation for carrying out tripping interval type first, according to the equipment that the type of protection act and breaker actuation are cut off,
Judgement is line segregation, movement occurred at intervals for transformer or station domain bus acts.
According to the action element type judged, the our station that extraction movement occurs and the protection alarm information to station.
The warning information for whether having protective device in for the previous period occurs by protection information system acquisition movement, according to
Whether the protective device warning information judgment means of acquisition are in normal operating condition, if there is protective device main protection alarm locking
It is defeated to step (5) then to be alerted locking information by information for protective device.
In the differentiation of protection act consistency on messaging, there is the protective device of protection blocking warning information to be not involved in following guarantor
Consistency discrimination is protected, then directly skips following protection consistency discrimination when remaining consistency protection differentiates that protection is only a set of
Link.
The one protection act information A of master including route is extracted when line segregation movementL1, main two protection act information AL2、
Main three protection act information AL3, auxiliary protection action message ALf, breaker protection act information ALdProtection act letter Deng including
Breath, the protection act information A when corresponding protection actL=1, protection act information A when protection is failure to actuateL=0.
Differentiate whether our station is consistent with to transmission line of electricity main protection, the action message of auxiliary protection in station protection information.
Discrimination formula are as follows:
F(AL)=AL1×AL2×AL3×ALf
A in formulaL1Based on a protection act information, AL2Based on two protection act information, AL3Based on three protection act information,
ALfTo assist protection act information, F (AL) it is that route protection action consistency differentiates as a result, working as F (ALWhen)=1, route is indicated
Consistency movement is protected, is otherwise the movement of route protection inconsistency.
According to breaker protection act information ALdDetermine whether the protection of line segregation breaker acts.
Extract when transformer spacing movement includes main transformer A set, B set protection act information ATA、ATB, non-ionizing energy loss is dynamic
Make information ATF, breaker protection act information ATdProtection act information inside is protected when the movement of corresponding tranformer protection
Action message AT=1, protection act information A when protection is failure to actuateT=0.
Differentiate whether the action message of main transformer A, B set protection in transformer electrical quantity protection act information is consistent.
Discrimination formula are as follows:
F(AT)=ATA×ATB
A in formulaTAProtection act information, A are covered for main transformer ATBProtection act information, F (A are covered for main transformer BT) it is that transformer is electrical
Protection act consistency discrimination is measured as a result, working as F (ATWhen)=1, indication transformer electrical quantity protects consistency movement, is otherwise change
Depressor electrical quantity protects inconsistency movement.
Work as ATFWhen=1, indication transformer non-electric quantity protection act, otherwise non-electric quantity protection is failure to actuate.
According to transformer bay every breaker protection act information ATdDetermine whether transformer bay acts every breaker protection.
When judging movement for bus, extracting includes one protection act information A of bus masterB1, main two protection act information
AB2, breaker protection act information ABdProtection act information inside, the protection act information when the movement of corresponding bus protection
AB=1, protection act information A when protection is failure to actuateB=0.
Differentiate whether the action message of more set main protections in bus protection action message is consistent.
Discrimination formula are as follows:
F(AB)=AB1×AB2
A in formulaB1For one protection act information of bus master, AB2For two protection act information of bus master, F (AB) it is bus protection
Action consistency differentiates as a result, working as F (ABWhen)=1, indicates the movement of bus protection consistency, be otherwise bus protection inconsistency
Movement.
According to bus interval breaker protection act information ABdDetermine whether bus interval breaker acts.
According to the comparison of the action consistency of above-mentioned each protection act information and the differentiation that whether acts of breaker, in bus and
On route in the case of protection act, following four protection act classification is obtained according to differentiation result: the movement of protection consistency, open circuit
Device protection is failure to actuate；Protect consistency movement, breaker protection act；Protect inconsistency movement, breaker protection act；It protects
The movement of shield inconsistency, breaker protection are failure to actuate.
It is acted when being determined as bus, enters step (3) after carrying out protection act consistency discrimination；When being determined as route
It acts, carries out entering step (2) after protection consistency discrimination.
In the case where transformer bay is acted every protection, according to the action consistency of electrical quantity main protection, non electrical quantity
Whether protection acts, and whether breaker protection acts, and obtains following several action classifications: the movement of electrical quantity main protection consistency,
Non-electric quantity protection act, breaker protection are failure to actuate；The movement of electrical quantity main protection consistency, is broken at non-electric quantity protection act
Road device protection act；The movement of electrical quantity main protection consistency, non-electric quantity protection are failure to actuate, breaker protection is failure to actuate；Electrically
Amount main protection consistency acts, non-electric quantity protection is failure to actuate, breaker protection act；Electrical quantity main protection inconsistency is dynamic
Work, the protection of non-electric quantity protection act, breaker are failure to actuate；The movement of electrical quantity main protection inconsistency, non-electric quantity protection are dynamic
Make, breaker protection act；The movement of electrical quantity main protection inconsistency, non-electric quantity protection are failure to actuate, breaker protection is motionless
Make；Electrical quantity main protection inconsistency acts, non-electric quantity protection is failure to actuate, breaker protection act.
It is acted when being determined as transformer, enters step (2) after carrying out protection act consistency discrimination.
In above-mentioned steps (2), in the case where protection act interval is determined in step (1), according to different protection acts
Spacing case carries out the primary information analysis at protection act interval, mainly records from the fault set in our station and opposite side substation
Fault current, false voltage, zero-sequence current, zero sequence direction, and the fault current by obtaining and voltage letter are extracted in wave information
Breath calculates the measurement impedance of failure, by obtaining the differential electricity at the fault current calculating action interval in our station and opposite side substation
Flow valuve.
When protection act interval is route, this side substation fault line voltage distribution U1 is extractedLf, fault current I1Lf, zero
Sequence electric current IM0, zero sequence direction f1L0, extract opposite side substation fault line voltage distribution U2Lf, fault current I2Lf, zero-sequence current IN0、
Zero sequence direction f2L0.Differentiated so that whether this information progress protection act interval route breaks down, method of discrimination is as follows.
Line fault criterion 1: if there is protection act interval in wave-record chart in the fault set of this side and opposite side substation
There is apparent fluctuation in the voltage and current of route, carries out route survey impedance by the line fault voltage and fault current of two sides
Calculating Lc。
In formula, RC1For the impedance for measuring distance line fault point in this side transforming plant primary information, LC1For this side substation
Primary information measures fault point distance, RlFor transmission line of electricity unit length impedance value, RC2To be surveyed in the transforming plant primary information of opposite side
Obtain the impedance of distance line fault point, LC2Fault point distance is measured for opposite side transforming plant primary information.When measuring fault point distance
LC1、LC2When less than this line length L, then this criterion judges that this route is faulty under criterion in impedance.
Line fault criterion 2: the zero sequence electricity for concentrating extraction two sides record in wave-record chart from this side and opposite side substation
Flow valuve and zero sequence direction judge line fault situation using zero-sequence current vector value.
IM0> ISet0
IN0> ISet0
ICD0> IQD0
I in formulaM0、IN0Zero-sequence current value, I are measured for two sidesSet0For zero-sequence current over-current adjusting value；ICD0It is differential for zero sequence
Electric current,For the amplitude of two sides zero-sequence current vector sum,Respectively this side and opposite side substation
Measure to obtain zero-sequence current vector value.IQD0For zero sequence starting current definite value.When this criterion is set up, then determine this route in zero sequence
It is faulty under difference current criterion.
Line fault criterion 3: the phase current vector for concentrating extraction two sides in wave-record chart from this side and opposite side substation
Value calculates phase current differential value and judges line fault situation.
ICDφ> IH
φ=A, B, C
ICDφFor difference current,For the amplitude of two sides current phasor sum；IHFor setting current.
When this criterion is set up, determine that this route is faulty under phase difference current criterion.
In route failure criterion, the judgement that fault characteristic value information carries out line fault criterion 1,2,3 is extracted, appearance is worked as
Criterion then judges that line segregation is faulty when setting up.
When according to criterion information, not judging when line segregation failure to be then judged to being spaced without reason based on above-mentioned criterion
Barrier.Go to step (5).(3) are then entered step when criterion information has not been obtained based on wall.
When judge that protection act interval is transformer in the step (1), based on recording in fault set, extract transformer height,
In, the electric current of low-pressure side.
Transformer fault criterion 1: calculating transformer difference current determines when difference current is greater than difference current initiation value
Faulty based on transformer under recording transformer differential current criterion.
Id> 0.2Ir+Icdqd Ir≤0.5Ie
IdFor difference current, IcdqdStart definite value, I for percentage differentialrFor stalling current, IeFor transformer rated current.
Transformer fault criterion 2: from the current value for extracting each side of transformer in fault set in recording, determine each side of transformer
Current value whether be greater than the setting valve of overcurrent protection and then judge that transformer is faulty if more than setting valve.
Transformer fault criterion 3: the non-ionizing energy loss action message of protection act interval protection equipment for transformer is extracted, is sentenced
The action situation of disconnected transformer non-electricity protection, when transformer non-electricity protection act, when simultaneous faults criterion 1 or 2 is set up, then
Determine that transformer is faulty.
In transformer fault differentiation, when meeting the either case in transformer fault criterion 1,2, it is judged as transformer
Be spaced it is faulty, criterion 3 set up when determine transformer non-electricity protection act it is correct.When getting criterion information, do not determine
Transformer bay goes to step (5) every, being then judged to being spaced fault-free in the event of failure out.When criterion information when progress has not been obtained
Step (3).
In above-mentioned steps (3), when judging that protection act is bus in step (1), bus is judged based on following criterion
Whether failure.
Bus-bar fault criterion: calculating bus differential electric current, when bus differential electric current is greater than difference current initiation value, determines
Faulty based on failure wave-recording bus differential electric current criterion Down Highway.
Id> Icdzd
I in formuladFor big differential phase current, IcdzdFor difference current initiation value.
When being determined as bus-bar fault, when meeting bus-bar fault criterion in step (3), then judge that bus breaks down, when
Bus criterion is got, judges then to be judged as bus fault-free when bus fault-free, goes to step (5).Sentence when bus has not been obtained
It is believed that continuing the judgement based on station domain information when breath.
The response message for analyzing the protection at other intervals of bus in this side and opposite side substation, failure wave-recording, judges that it is
It is no to have response, if wave recording device records, obtain the failures such as the fault current, false voltage, zero sequence direction at other intervals spy
Sign amount information, determines whether other intervals break down, the same step of fault verification mode (2), and according to the recording of station domain bus
Information carries out whether breaking down in the protection act interval of auxiliary judgement line and transformer interval.If auxiliary judgement go out bus and
Failure occurred at intervals in power transformation device, then goes to step (5).
It appeals in step (4), analyzes Wide-area Measurement Information, according to network topology structure, obtain protection act interval substation
The protection at other intervals of the upper level or next stage plant stand of connection, failure wave-recording response message then obtain event if there is starting
Hinder zero sequence, negative sequence voltage and electric current, determines whether other intervals break down under Wide-area Measurement Information, the same step of fault verification mode
(2), and according to the fault characteristic value information of wide area wave-record chart, pass through zero sequence, the amplitude size distribution of negative phase-sequence characteristic quantity and side
Tropism determines whether break down in protection act interval.
In above-mentioned steps (5), information fusion is carried out according to the judgement result in step (1) (2) (3) (4) step, determines protection
Act the correctness of spacing movement.
If there is protective device locking, blocking device goes wrong out of service.
The information at line and transformer movement interval is merged and is differentiated:
When judging route, bus in the event of failure from step (2) (3) (4), according to the consistency and open circuit of protection act
The action situation of device provides faulty protection act evaluation result；Otherwise trouble-free evaluation result is provided.
Route and bus determine that protection act evaluation result is as follows in the event of failure:
If protecting consistency movement, breaker protection is not operating, then the correct movement excision between-failures of protection；
If protecting consistency movement, breaker protection act, then the correct movement of protection, breaker tripping, breaker protection
Movement excision between-failures；
If protecting inconsistency movement, breaker protects not operating, then not operating main protection tripping, by the main guarantor acted
Shield movement excision between-failures；
If protecting inconsistency movement, breaker protection act, then not operating main protection tripping, there is the main protection of movement
Trip signal, breaker tripping are sent out, breaker protection act cuts off failure.
Line and transformer interval determines that protection act evaluation result is as follows when fault-free:
If protection is not operating, trip, is then determined as breaker malfunction；
If protection act, it is determined as false protection situation.
If movement interval is line segregation, and determines resistance algorithm not in line range according to line segregation primary information
It is interior, then according to ranging information and excessive resistance calculated case, determine whether circuit high resistant ground fault.
It is as follows to tranformer protection action evaluation according to the criterion of step (2) (3) (4) transformer:
When protection act evaluation result is as follows in the event of failure every judgement for transformer bay:
If electrical quantity main protection consistency acts, breaker protection is not operating, then the correct movement excision between-failures of protection；
If electrical quantity main protection consistency acts, breaker protection act, then the correct movement of protection, breaker tripping are broken
Road device protection act cuts off between-failures；
If electrical quantity main protection inconsistency acts, breaker protects not operating, then not operating main protection tripping, by moving
The main protection movement excision between-failures of work；
If electrical quantity main protection inconsistency acts, breaker protection act, then not operating main protection tripping, there is movement
Main protection send out trip signal, breaker tripping, breaker protection act cut off failure.
When protection act evaluation result is as follows when determining fault-free for transformer bay:
If protection is not operating, trip, is then determined as breaker malfunction；
If being determined as false protection situation when electrical quantity protection or non-electric quantity protection act；
If non-electric quantity protection act, non-electric quantity false protection when being set up according to recording electrical quantity fault-free criterion
Make.
In above-mentioned steps (6), according to above to the result of the analysis situation output protection intelligent operation analysis of protection operation.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (15)
1. a kind of relay protection based on Multi-level information fusion acts intelligent evaluation method, it is characterized in that: after obtaining tripping information,
Classification obtains information from power grid, carries out tripping interval secondary information analysis, the primary information analysis of tripping interval, domain letter of standing respectively
Breath analysis and Wide-area Measurement Information analysis, according to extracted fault characteristic value information at different levels and by the judging result of various criterions,
Multi-level information is merged, protection act behavior correctness is judged, and finally provides the correct action assessment of protection
As a result；
The specific method of tripping interval secondary information analysis is, according to the action situation of SOE system, to determine movement interval, collect
The secondary information that this side substation and opposite side substation at tripping interval occurs is extracted, including route acts interval our station and to station
Each set route protection and breaker protection act information；Each set electrical quantity protection at transformer action interval, non-ionizing energy loss
With the action message of breaker protection；More set main protections at bus movement interval and the action message of breaker protection；Collection mentions
It goes bail for the warning information of protection unit, based on the movement interval secondary information of all collections to occurring in tripping interval two sets or more
The action consistency of set protection carries out analysis and distinguishing.
2. a kind of relay protection based on Multi-level information fusion as described in claim 1 acts intelligent evaluation method, feature
It is: carries out the differentiation of tripping interval type, according to the equipment that the type of protection act and breaker actuation are cut off, judgement is route
Movement occurred at intervals in interval, transformer or station domain bus acts；According to the action element type judged, extraction movement
The our station of generation and protection alarm information to station；Occur whether to have in for the previous period by protection information system acquisition movement
Whether the warning information of protective device is in normal operating condition according to the protective device warning information judgment means of acquisition, if
There is protective device main protection alarm locking information, then protective device is alerted into locking information and carry out final fusion rules.
3. a kind of relay protection based on Multi-level information fusion as described in claim 1 acts intelligent evaluation method, feature
It is: carries out interval primary information analysis method particularly includes: it extracts and tripping interval our station and the concentration recorder data to station occurs, from
It concentrates and extracts interval primary information in recorder data, including difference current, power direction, fault current, false voltage, zero sequence electricity
Stream, zero sequence direction or/and measurement impedance fault characteristic quantity, fault characteristic value is compared with fixed value list, determines gained failure
Whether characteristic quantity is in actuating range.
4. a kind of relay protection based on Multi-level information fusion as described in claim 1 acts intelligent evaluation method, feature
It is: carries out station domain information analysis method particularly includes: other interval in substation where judgement tripping interval and opposite side substation
Whether protection, failure wave-recording response message have starting, and fault current, false voltage and zero sequence side are extracted in the case where there is starting
To fault characteristic value, determine whether the fault characteristic value at station other intervals of domain meets the requirement of protection act.
5. a kind of relay protection based on Multi-level information fusion as described in claim 1 acts intelligent evaluation method, feature
It is: carries out the detailed process of Wide-area Measurement Information analysis are as follows: according to electricity grid network topological structure, searches for upper level or next stage plant stand
Whether the protection at other intervals, failure wave-recording response message have starting, utilize fault current, false voltage and zero sequence direction failure
Whether characteristic quantity assists the requirement for meeting tripping interval.
6. a kind of relay protection based on Multi-level information fusion as claimed in claim 2 acts intelligent evaluation method, feature
It is: is acted when being determined as transformer, enters interval primary information analysis after carrying out protection act consistency discrimination, be spaced
In the case where determining protection act interval in secondary information analysis, protection act is carried out according to different protection act spacing cases
The primary information at interval is analyzed, mainly electric from failure is extracted in the fault set in our station and opposite side substation in wave-record chart
Stream, false voltage, zero-sequence current and zero sequence direction, and the fault current by obtaining and information of voltage calculate the measurement resistance of failure
It is anti-, by obtaining the differential current value at the fault current calculating action interval in our station and opposite side substation.
7. a kind of relay protection based on Multi-level information fusion as claimed in claim 2 acts intelligent evaluation method, feature
It is: when protection act interval is route, extracts this side substation fault line voltage distribution U1Lf, fault current I1Lf, zero-sequence current
IM0, zero sequence direction f1L0, extract opposite side substation fault line voltage distribution U2Lf, fault current I2Lf, zero-sequence current IN0With zero sequence side
To f2L0, differentiated so that whether this information progress protection act interval route breaks down, method of discrimination is as follows:
Line fault criterion 1: if there is protection act interval route in wave-record chart in the fault set of this side and opposite side substation
Voltage and current there is apparent fluctuation, the meter of route survey impedance is carried out by the line fault voltage and fault current of two sides
Calculate fault point distance；
Line fault criterion 2: the zero-sequence current value for concentrating extraction two sides record in wave-record chart from this side and opposite side substation
And zero sequence direction, line fault situation is judged using zero-sequence current vector value；
Line fault criterion 3: the phase current vector value for concentrating extraction two sides in wave-record chart from this side and opposite side substation, meter
It calculates phase current differential value and judges line fault situation；
In route failure criterion, the judgement that fault characteristic value information carries out three above line fault criterion is extracted, appearance is worked as
Criterion then judges that line segregation is faulty when setting up.
8. a kind of relay protection based on Multi-level information fusion as claimed in claim 2 acts intelligent evaluation method, feature
It is: when judging that protection act interval is transformer in carrying out interval secondary information analysis, based on recording in fault set, extracts and become
Depressor is high, neutralizes the electric current of low-pressure side, specifically includes:
Transformer fault criterion 1: calculating transformer difference current determines when difference current is greater than difference current initiation value in base
Transformer is faulty under recording transformer differential current criterion；
Transformer fault criterion 2: from the current value for extracting each side of transformer in fault set in recording, determine the electricity of each side of transformer
Whether flow valuve is greater than the setting valve of overcurrent protection, if more than setting valve, then judges that transformer is faulty；
Transformer fault criterion 3: the non-ionizing energy loss action message of protection act interval protection equipment for transformer is extracted, judges to become
The action situation of depressor non-ionizing energy loss, when transformer non-electricity protection act then determines when simultaneous faults criterion 1 or 2 is set up
Transformer is faulty；
Transformer fault differentiation in, when meeting the either case in transformer fault criterion 1,2, be judged as transformer bay every
It is faulty, determine that transformer non-electricity protection act is correct when criterion 3 is set up；When getting criterion information, change is not determined
Depressor interval in the event of failure, then is judged to being spaced fault-free.
9. a kind of relay protection based on Multi-level information fusion as claimed in claim 4 acts intelligent evaluation method, feature
It is: when carrying out station domain information analysis, when judging that protection act is bus in interval secondary information analysis, is based on following criterion
Judge bus whether failure, bus-bar fault criterion: calculate bus differential electric current, when bus differential electric current be greater than difference current starting
When value, determine based on failure wave-recording bus differential electric current criterion Down Highway it is faulty, when being determined as bus-bar fault, meet bus
When failure criterion, then judge that bus breaks down, when getting bus criterion, judge then to be judged as when bus fault-free bus without
Failure goes to Multi-level information fusion, when bus criterion information has not been obtained, continues the judgement based on station domain information.
10. a kind of relay protection based on Multi-level information fusion as described in claim 1 acts intelligent evaluation method, feature
It is: analyzes the response message of the protection at other intervals of bus in this side and opposite side substation, failure wave-recording, judge whether it has sound
It answers, if wave recording device records, obtains the fault characteristic values such as the fault current, false voltage, zero sequence direction at other intervals letter
Breath, determines whether other intervals break down, and carries out auxiliary judgement line and transformer according to the wave-record chart of station domain bus
Whether interval breaks down in protection act interval, if auxiliary judgement has bus and failure occurred at intervals in power transformation device, goes to more
Grade information fusion.
11. a kind of relay protection based on Multi-level information fusion as claimed in claim 5 acts intelligent evaluation method, feature
Be: analysis Wide-area Measurement Information obtains the upper level or next stage of the connection of protection act interval substation according to network topology structure
The protection at other intervals of plant stand, failure wave-recording response message then obtain failure zero sequence, negative sequence voltage and electricity if there is starting
Stream determines whether other intervals break down under Wide-area Measurement Information, and according to the fault characteristic value information of wide area wave-record chart, passes through
Zero sequence, the amplitude size distribution of negative phase-sequence characteristic quantity and directionality determine whether break down in protection act interval.
12. a kind of relay protection based on Multi-level information fusion as claimed in claim 7 acts intelligent evaluation method, feature
It is:
When carrying out station domain information analysis, when judging that protection act is bus in interval secondary information analysis, sentenced based on following
It is judged that bus whether failure, bus-bar fault criterion: calculate bus differential electric current, when bus differential electric current is opened greater than difference current
When dynamic value, determine when being determined as bus-bar fault, to meet female faulty based on failure wave-recording bus differential electric current criterion Down Highway
When line failure criterion, then judge that bus breaks down, when getting bus criterion, judges then to be judged as bus when bus fault-free
Fault-free goes to Multi-level information fusion, when bus criterion information has not been obtained, continues the judgement based on station domain information；
Route and bus determine that protection act evaluation result is as follows in the event of failure:
If protecting consistency movement, breaker protection is not operating, then the correct movement excision between-failures of protection；
If protecting consistency movement, breaker protection act, then the correct movement of protection, breaker tripping, breaker protection act
Cut off between-failures；
If protecting inconsistency movement, breaker protection is not operating, then not operating main protection tripping, is moved by the main protection acted
Make excision between-failures；
If protecting inconsistency movement, breaker protection act, then not operating main protection tripping has the main protection hair of movement to jump
Lock order, breaker tripping, breaker protection act cut off failure.
13. a kind of relay protection based on Multi-level information fusion as claimed in claim 7 acts intelligent evaluation method, feature
It is: when judging that protection act interval is transformer in carrying out interval secondary information analysis, based on recording in fault set, extracts and become
Depressor is high, neutralizes the electric current of low-pressure side, specifically includes:
Transformer fault criterion 1: calculating transformer difference current determines when difference current is greater than difference current initiation value in base
Transformer is faulty under recording transformer differential current criterion；
Transformer fault criterion 2: from the current value for extracting each side of transformer in fault set in recording, determine the electricity of each side of transformer
Whether flow valuve is greater than the setting valve of overcurrent protection, if more than setting valve, then judges that transformer is faulty；
Transformer fault criterion 3: the non-ionizing energy loss action message of protection act interval protection equipment for transformer is extracted, judges to become
The action situation of depressor non-ionizing energy loss, when transformer non-electricity protection act then determines when simultaneous faults criterion 1 or 2 is set up
Transformer is faulty；
Transformer fault differentiation in, when meeting the either case in transformer fault criterion 1,2, be judged as transformer bay every
It is faulty, determine that transformer non-electricity protection act is correct when criterion 3 is set up；When getting criterion information, change is not determined
Depressor interval in the event of failure, then is judged to being spaced fault-free；
Line and transformer interval determines that protection act evaluation result is as follows when fault-free:
If protection is not operating, trip, is then determined as breaker malfunction；
If protection act, it is determined as false protection situation；
If movement interval is line segregation, and according to line segregation primary information judgement resistance algorithm not in line range, then
According to ranging information and excessive resistance calculated case, circuit high resistant ground fault is determine whether.
14. a kind of relay protection based on Multi-level information fusion as claimed in claim 13 acts intelligent evaluation method, special
Sign is: when protection act evaluation result is as follows in the event of failure every judgement for transformer bay:
If electrical quantity main protection consistency acts, breaker protection is not operating, then the correct movement excision between-failures of protection；
If electrical quantity main protection consistency acts, breaker protection act, then the correct movement of protection, breaker tripping, breaker
Protection act cuts off between-failures；
If electrical quantity main protection inconsistency acts, breaker protects not operating, then not operating main protection tripping, by what is acted
Main protection movement excision between-failures；
If electrical quantity main protection inconsistency acts, breaker protection act, then not operating main protection tripping, there is the master of movement
Protection hair trip signal, breaker tripping, breaker protection act cut off failure.
15. a kind of relay protection based on Multi-level information fusion as claimed in claim 13 acts intelligent evaluation method, special
Sign is: when protection act evaluation result is as follows when determining fault-free for transformer bay:
If protection is not operating, trip, is then determined as breaker malfunction；
If being determined as false protection situation when electrical quantity protection or non-electric quantity protection act；
If non-electric quantity protection act, non-electric quantity protection misoperation when being set up according to recording electrical quantity fault-free criterion.
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