CN104655985B - Electric network failure diagnosis method based on and/or tree model - Google Patents
Electric network failure diagnosis method based on and/or tree model Download PDFInfo
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- CN104655985B CN104655985B CN201510048392.3A CN201510048392A CN104655985B CN 104655985 B CN104655985 B CN 104655985B CN 201510048392 A CN201510048392 A CN 201510048392A CN 104655985 B CN104655985 B CN 104655985B
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000004224 protection Effects 0.000 claims abstract description 106
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 230000007257 malfunction Effects 0.000 claims abstract description 3
- 239000007858 starting material Substances 0.000 claims abstract description 3
- 238000011156 evaluation Methods 0.000 claims abstract 2
- 230000008569 process Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 238000013138 pruning Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 102100031102 C-C motif chemokine 4 Human genes 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001364 causal effect Effects 0.000 description 1
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- 238000002405 diagnostic procedure Methods 0.000 description 1
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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
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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
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Abstract
The invention provides a kind of electric network failure diagnosis method based on and/or tree model, including：Gather grid disruption road device tripping operation information formation power supply interrupted district；An element in selected power supply interrupted district is suspected fault element, and breadth first traversal computing is carried out to it and forms traversal spanning tree；The and/or tree fault diagnosis model for the suspected fault element set up in power supply interrupted district；Circuit breaker failure information is gathered, and the and/or tree fault diagnosis model that fault message substitutes into suspected fault element will be collected, if the and/or tree model can be solved, can determine that as fault element, be not otherwise fault element；Repeat the above steps until finding fault element；Protection starter node in and/or tree diagnostic model, protection act node, the position distribution situation of breaker actuation node; compared with the and/or tree model of correct operation; to evaluation analysis after fault diagnosis result carry out accident; it is determined that the malfunction and misaction situation of protection, and the warning message lost.
Description
Technical field
The present invention relates to power system electric network failure diagnosis field, more particularly, to a kind of power network based on and/or tree model
Method for diagnosing faults.
Background technology
Power system failure diagnostic is that the precondition restored electricity rapidly after power outage occurs for power network.Occur in failure
The very first time afterwards, protection starts information, protection act information and circuit breaker trip information and almost sent out simultaneously from local signal
Generating apparatus collects to control centre, and a large amount of warning messages easily form network congestion in dispatching terminal.Consider in addition in packet
Between by repeatedly route transfer and share powerline network bandwidth with the system such as SCADA, WAMS, warning message reaches failure
During diagnosis server, often there is situations such as loss of learning, distortion.Therefore, a kind of power network event for being adapted to all kinds of situations is invented
Hinder diagnostic method, and then improve the fault-tolerance of fault diagnosis model, a pair event is remained able in the case of warning message is incomplete
Barrier element is accurately judged, and the information of missing is tracked so as to later maintenance, is with realistic meaning.
The subject matter faced in current electric network failure diagnosis is：
(1) situation about often being lacked when fault alarm information reaches dispatching terminal.The very first time after failure generation,
Protection and breaker actuation information are almost collected from local signal generation apparatus to control centre simultaneously, and a large amount of warning messages exist
Dispatching terminal easily forms network congestion.Consider in addition in the middle of packet by repeatedly route transfer and with SCADA, WAMS etc.
System shares powerline network bandwidth, therefore warning message is when reaching fault diagnosis server, loss of learning often occurs, abnormal
Situations such as change.
(2) situation about being lacked for warning message, the method that fault diagnosis model fault-tolerance is improved at present is relied primarily on thoroughly
All possible warning message is combined by the mode of act, then passes through optimized algorithm and the actual report being collected into control centre
Alert information is that desired value is compared, so that the warning message for judging fault element and failing to report.However as the continuous expansion of power network
The configuration of big and dual protection, the number of combinations of warning message is sharply increased, and causes this method poor astringency and complexity
It is higher.
On the other hand, many data ignored by traditional fault diagnosis algorithm can also provide for the judgement of fault element
Valuable information, such as power network topology and protection start information.Wherein, power network topology can be by suspected fault element with breaking
Road device and protection are concatenated, and form a complete diagnostic model；And protect startup information to be lost in protection exit information
Judgement in the case of mistake to provide fault element provides reliable foundation.
The content of the invention
To solve the above problems, the invention provides a kind of electric network failure diagnosis method based on and/or tree model.
The present invention is adopted the following technical scheme that：
A kind of electric network failure diagnosis method based on and/or tree model, comprises the following steps：
Step (1)：Gather grid disruption road device tripping operation information formation power supply interrupted district；
Step (2)：An element in selected power supply interrupted district is suspected fault element, and breadth first traversal fortune is carried out to it
Calculate and form traversal spanning tree；
Step (3)：The and/or tree fault diagnosis model for the suspected fault element set up in power supply interrupted district；
Step (4)：Gather circuit breaker failure information, and the and/or tree that fault message substitution suspected fault element will be collected
Fault diagnosis model, if the and/or tree model can be solved, can determine that as fault element, is not otherwise fault element；Repeat above-mentioned
Step is until find fault element；
Step (5)：Protection starter node, protection act node and breaker actuation section in and/or tree diagnostic model
The position distribution situation of point, compares with the and/or tree model of correct operation, divides being evaluated after fault diagnosis result carry out accident
Analysis, it is determined that the malfunction and misaction situation of protection, and the warning message lost.
Step (1) breaker is protected by isolated fault element to power network, and the protection situation includes：Protection
Action and circuit breaker trip；According to the distance of breaker and fault element, protection is divided into：Main protection, nearly back-up protection and it is remote after
Standby protection.
The process of formation traversal spanning tree is in the step (2)：
Step (2.1)：Traversal starting point is set as suspected fault element, the condition that search branch stops is to search power supply
Or load node；
Step (2.2)：The summit and side that step (2.1) is traversed through, are reconfigured according to order from top to bottom,
Form the tree structure using suspected fault element as root node；
Step (2.3)：In power network topology, in addition to suspected fault element, the generation cause and effect only retained with fault element is closed
The breaker of system, simplifies the tree structure that step (2.2) is formed；
Step (2.4)：Suspected fault element, and the breaker equal position nearest with suspected fault element distances are constant, institute
State the root node that the nearest breaker of suspected fault element distances is respectively left subtree and right subtree；
Step (2.5)：Remaining breaker in the tree structure of step (2.3) abbreviation that moves forward, using it as its institute
In subordinate's subtree of left subtree or the root node of right subtree, final traversal spanning tree is formed.
The generation method of the and/or tree diagnostic model of suspected fault element is in the step (3)：
With parallel protection-breaker binary and tree and back-up protection-breaker fail protection or tree-model replace
The breaker node in traversal spanning tree in step (2), obtains the and/or tree fault diagnosis model of suspected fault element.
Protection-breaker binary and the generating process of tree in the step (3) are：
According to protection with breaker in configuration exist action before and after logical relation, by the protection act in power network and guarantor
Shield start information as the root node of left subtree subordinate's subtree, and protection act information with protection start information be with logic
Relation；Protection association breaker as the root node of right subtree subordinate's subtree, be also between protection association breaker with
Logical relation.
The generating process of back-up protection-breaker fail protection or tree in the step (3) is：
When occur protecting in power network or breaker tripping situation, back-up protection or breaker fail protection can tripping it is remote
Hold circuit breaker trip fault current, now back-up protection-breaker binary and tree and breaker fail protection-breaker binary with
Tree is combined into one or tree, obtain back-up protection-breaker fail protection or tree.
Circuit breaker failure in the step (4), including：Protection and breaker correct operation；Breaker fail protection is not
Put into operation；Breaker fail protection puts into operation；And relay fail.
Circuit breaker failure information in the step (4), including：Trip information, protection startup information and protection act letter
Breath.
Beneficial effects of the present invention are：
(1) present invention adds power network topology element on the basis of conventional diagnostic model and protection starts information, shape
Into the and/or tree diagnostic model to electric network fault element；
(2) diagnostic model of the invention starts information, protection act information and breaker comprising power network topology, protection and jumped
Lock information, relative to conventional diagnostic model, comprising data volume more enrich, have good information redundancy function；
(3) and/or tree model of the invention is based on power network topology and has interpretation to result, therefore the model has more
Good versatility, analysis result can aid in operations staff to set up timely and effectively electric network fault correcting strategy, improve the confession of power network
Electric reliability.
Brief description of the drawings
Fig. 1 is the power network exemplary plot used in the present invention；
Fig. 2 (a) generates tree-model for the circuit L1 of the power network exemplary plot used in present invention traversal；
Fig. 2 (b) models after beta pruning is handled for traversal spanning tree of the invention；
Fig. 2 (c) only retains the traversal generation tree-model after breaker node simplifies for the present invention in addition to suspected fault element；
Fig. 2 (d) is final traversal spanning tree of the invention；
Fig. 3 (a) is protection-breaker binary and tree；
Fig. 3 (b) for back-up protection-breaker fail protection or tree-model；
Fig. 4 is the and/or tree diagnostic model for the formation of suspected fault element；
Fig. 5 (a) is the solution of and/or tree diagnostic model in the case of protection and breaker correct operation；
Fig. 5 (b) is the solution of and/or tree diagnostic model in the case of breaker fail protection does not put into operation；
Fig. 5 (c) is the solution of and/or tree diagnostic model in the case of breaker fail protection puts into operation；
Fig. 5 (d) is the solution of and/or tree diagnostic model in the case of relay fail.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
The operation principle of the present invention:
Power network topology is analyzed by circuit breaker trip information first, power supply interrupted district delimited；Due to fault element one
Surely can be in power supply interrupted district, therefore the element in power supply interrupted district can be considered as suspected fault element；Then, to each suspicious event
Barrier element sets up and/or tree diagnostic model, and the circuit breaker trip information being collected into, protection are started into information and protection act letter
Breath is updated to the model, if the model can be solved, for fault element.
In Fig. 1, circuit L1 both sides configure two main protections P1, P2.If circuit L1 breaks down, fault current trigger protection
P1, P2, and then breaker CB1 and CB2 is tripped.
It is to obtain the step of circuit L1 travels through spanning tree to be shown in Fig. 2：
1) due to fault current direction be from power supply to fault element, therefore the present invention will traversal starting point be set as it is suspicious
Fault element, the condition that search branch stops is to search power supply or load node.
2) by the summit traversed through and side, reconfigured according to order from top to bottom, the tree structure of formation, this
Invention is defined as traveling through spanning tree.Define accordingly, in Fig. 1 shown in L1 traversal spanning tree such as Fig. 2 (a).If remote back-up protection
Setting range is N bar circuits, then when the element failure in power network, and traveling through each branch of spanning tree along it searches for downwards, N bar lines
The branch that route protection within road can send outside startup information, N bar circuits can do beta pruning processing.Time shown in Fig. 2 (a)
Spanning tree is gone through after beta pruning is handled as shown in Fig. 2 (b).
3) for fault element, it is association breaker to occur therewith in power network topology causal, therefore will can be cut
Traversal spanning tree after branch makees further simplified, and breaker node is only retained in addition to suspected fault element.Fig. 2 (b) is made into one
Traversal spanning tree such as Fig. 2 (c) after step simplifies is shown.
4) action logic further protected after analysis circuit failure, if the L1 in Fig. 2 (c) breaks down, the master at two ends
Protection or nearly standby tripping first breaker CB1, the CB2 nearest from it.Assuming that have protection or the non-tripping CB2 of breaker tripping,
Then breaker fail protection tripping CB3 or remote back-up protection tripping CB4 disengagement failure electric currents.Pass through above-mentioned analysis, breaker
The corresponding CB3 of the failure protection and corresponding CB4 of remote back-up protection is coordination for CB2, therefore the present invention will
The far corresponding breaker reach of back-up protection, breaker corresponding with breaker fail protection is corresponding breaking collectively as main protection
The branch of device, forms shown in final traversal spanning tree such as Fig. 2 (d).
Fig. 3 is protection-breaker binary and tree and the binary or tree-model of back-up protection-breaker fail protection.Protection
Isolation to fault element can regard two subproblems as：1) protection act 2) circuit breaker trip.Both need to cooperate, ability
Disengagement failure electric current, fault element is isolated from power network, and this process is a kind of exploded relationship.In addition, though protection is with breaking
There is the logical relation before and after action in road device, lost it is contemplated that breaker has tripping, jump or tripping operation information in configuration
The situation of mistake, both have no the causality of determination in theory, therefore corresponding to traversal spanning tree, it is of the invention by breaker section
Point is replaced with parallel protection-breaker binary with tree, is formed to suspected fault element and tree inference pattern such as Fig. 3 (a) institutes
Show.
If there is the situation of protection or breaker tripping, back-up protection or breaker fail protection meeting tripping distal end are disconnected
Road device disengagement failure electric current.Because back-up protection or breaker fail protection meet one, therefore the process can be used as one
Equivalence transformation is planted, one or tree, i.e., back-up protection-breaker fail protection binary or tree-model shown in Fig. 3 (b) is corresponded to.
Fig. 4 is that the generation method of suspected fault element L1 and/or tree diagnostic model is：
By back-up protection-breaker fail protection shown in the protection in Fig. 3 (a)-breaker binary and tree and Fig. 3 (b)
Binary or tree-model substitute into the traversal spanning tree of Fig. 2 (d) generations, obtain the and/or tree fault diagnosis model of suspected fault element.
Fig. 5 be will be all kinds of in the case of warning message substitute into fault diagnosis model after, the solution situation of model.
1) protection and breaker correct operation
L1 two ends main protection correct operation, the warning message of generation starts information R for some protections such as main protection, nearly standby
And outlet information PL1m；Association circuit breaker trip simultaneously produces tripping operation information CB1, CB2.Section can be solved by the way that warning message is brought into
Point, shown in obtained Xie Shu such as Fig. 5 (a).L1 and/or tree diagnostic model, which can finally be obtained, to be solved, and L1 is fault element.
2) breaker tripping
L1 two ends main protection correct operation, produces some protections such as main protection, nearly standby and starts information R and outlet information
PL1m, association breaker CB2 trips and produce trip information CB2, but CB1 breaker trippings.If breaker fail protection is not thrown
Enter operation, failure is cut off by remote back-up protection, the warning message of generation starts information R, protection exit information PL3- for protection
B4s, PL4-B5s and circuit breaker trip information CB6, CB8.By bringing warning message into solved node, obtained Xie Shuru
Shown in Fig. 5 (b).If breaker fail protection puts into operation, other breaker CB5, CB7 on the same bus of tripping, by inciting somebody to action
Warning message brings solved node into, shown in obtained Xie Shu such as Fig. 5 (c).L1 and/or tree diagnostic model, which can finally be obtained, to be solved, L1
For fault element.
3) relay fail
When L1-B1 sides relay fail, the non-trippings of CB1, by remote standby PL3-B4s, PL4-B5s, tripping CB6, CB8 is cut respectively
Except failure.Because the binary of back-up protection PL3-B4s, PL4-B5s formation and tree counter can release CB1 and L1-B1 sides relay fail,
With reference to R, PL1m and CB2 of L1-B2 sides warning message, shown in obtained Xie Shu such as Fig. 5 (d).Can finally obtain L1 with or
Tree diagnostic model can be solved, and L1 is fault element.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (3)
1. a kind of electric network failure diagnosis method based on and/or tree model, it is characterised in that comprise the following steps：
Step（1）：Gather grid disruption road device tripping operation information formation power supply interrupted district；
Step（2）：An element in selected power supply interrupted district is suspected fault element, and breadth first traversal computing shape is carried out to it
Into traversal spanning tree；
Step（3）：The and/or tree model for the suspected fault element set up in power supply interrupted district；
Step（4）：Gather circuit breaker failure information, and the and/or tree mould that fault message substitution suspected fault element will be collected
Type, if the and/or tree model can be solved, can determine that as fault element, is not otherwise fault element；Repeat the above steps until looking for
To fault element；
Step（5）：The position of protection starter node, protection act node and breaker actuation node in and/or tree model
Distribution situation, compares with the and/or tree model of correct operation, to evaluation analysis after fault diagnosis result carry out accident, it is determined that protecting
The malfunction and misaction situation of shield, and the warning message lost；
The step（2）It is middle formed traversal spanning tree process be：
Step（2.1）：Traversal starting point is set as suspected fault element, the condition that search branch stops is to search power supply or negative
Carry node；
Step（2.2）：By step（2.1）The summit and side traversed through, is reconfigured according to order from top to bottom, is formed
Using suspected fault element as the tree structure of root node；
Step（2.3）：In power network topology, in addition to suspected fault element, only retain and occur causality with suspected fault element
Breaker, simplify step（2.2）The tree structure of formation；
Step（2.4）：Suspected fault element, and the breaker equal position nearest with suspected fault element distances are constant, it is described can
Doubt the root node that the closest breaker of fault element is respectively left subtree and right subtree；
Step（2.5）：Move forward step（2.3）Remaining breaker in the tree structure of abbreviation, it is left using it as its place
Subordinate's subtree of the root node of subtree or right subtree, forms final traversal spanning tree；
The step（3）The generation method of the and/or tree model of middle suspected fault element is：
With parallel protection-breaker binary and tree and back-up protection-breaker fail protection or tree-model replace step
（2）In traversal spanning tree in breaker node, obtain the and/or tree model of suspected fault element；
The step（3）In protection-breaker binary and tree generating process be：
According to protection with breaker in configuration exist action before and after logical relation, the protection act in power network and protection are opened
Dynamic information as the root node of left subtree subordinate's subtree, and protection act information and protection start information be with logic close
System；Protection association breaker as the root node of right subtree subordinate's subtree, be also between protection association breaker and
Logical relation；
The step（3）In the generating process of back-up protection-breaker fail protection or tree be：
When occur protecting in power network or breaker tripping situation, back-up protection or breaker fail protection can tripping distal end it is disconnected
Road device disengagement failure electric current, now two protection-breaker binary be combined into one or tree with tree, obtain back-up protection-open circuit
Device failure protection or tree.
2. a kind of electric network failure diagnosis method based on and/or tree model as claimed in claim 1, it is characterised in that the step
Suddenly（1）Breaker is protected by isolated fault element to power network, and the protection situation includes：Protection act and breaker are jumped
Lock；According to the distance of breaker and fault element, protection is divided into：Main protection, nearly back-up protection and remote back-up protection.
3. a kind of electric network failure diagnosis method based on and/or tree model as claimed in claim 1, it is characterised in that the step
Suddenly（4）In circuit breaker failure information, including：Trip information, protection startup information and protection act information.
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| CN105162095B (en) * | 2015-09-25 | 2018-03-02 | 贵州电网公司信息通信分公司 | A kind of power distribution network short circuits isolated area generation method |
| CN105260863A (en) * | 2015-11-26 | 2016-01-20 | 国家电网公司 | Fault single influence factor analysis method based on power cable fault information |
| CN106226657B (en) * | 2016-09-07 | 2021-04-23 | 上海市政工程设计研究总院（集团）有限公司 | Power failure area identification method for power grid fault diagnosis |
| CN106546875B (en) * | 2016-10-13 | 2020-09-22 | 华北科技学院 | Electric power line alarm method |
| CN106646108A (en) * | 2016-10-14 | 2017-05-10 | 北京鼎科远图科技有限公司 | Overhead power line alarming method |
| CN112580828B (en) * | 2019-09-30 | 2023-10-24 | 北京天诚同创电气有限公司 | Method for determining operation and maintenance time and operation and maintenance task allocation system |
| CN111157842B (en) * | 2019-12-31 | 2022-08-30 | 浙江华云信息科技有限公司 | Power distribution line distribution transformer power failure fault studying and judging method based on power grid topology |
| CN112488337B (en) * | 2020-12-11 | 2023-07-25 | 广东电力通信科技有限公司 | Intelligent auxiliary overhaul flow analysis method and system |
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| KR20030035014A (en) * | 2001-10-29 | 2003-05-09 | 한국전력공사 | A fault section detection equipment and method considering both fault indicator and fault currents |
| CN102156240B (en) * | 2011-05-13 | 2013-03-27 | 西南交通大学 | Regional electric network failure diagnosis method based on five-layer and three-region cause and effect rule network |
| CN103020713A (en) * | 2012-11-19 | 2013-04-03 | 山东大学 | Intelligent substation fault diagnosis method combining topology and relay protection logic |
| CN103308824B (en) * | 2013-05-31 | 2015-06-03 | 东北大学 | Power system fault diagnostic method based on probability Petri net |
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