CN106405267A - Fault detection method in wide-area backup protection system - Google Patents
Fault detection method in wide-area backup protection system Download PDFInfo
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- CN106405267A CN106405267A CN201610597865.XA CN201610597865A CN106405267A CN 106405267 A CN106405267 A CN 106405267A CN 201610597865 A CN201610597865 A CN 201610597865A CN 106405267 A CN106405267 A CN 106405267A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention relates to a fault detection method in a wide-area backup protection system. The fault detection method comprises the steps of: acquiring wide-area measurement information in operation of an electric power system, adopting a voltage acquisition vector and/or a current acquisition vector as an original attribute variable, and adding strong Gaussian random interference to the original attribute variable. The fault detection method has high anti-interference capability, can satisfy requirement of system redundancy, can meet requirements of the wide-area backup protection system for real-time performance and precision of fault positioning, and has the advantages of clear thinking and simple operation.
Description
Technical field
The invention belongs to distribution technique field is and in particular to one kind, under strong Gaussian noise background, serves wide area adaptive
Answer the fault detection method of backup protection system for damping.
Background technology
Interconnection Complex Power Network requires power system to possess very high stability, in order to ensure power system on a large scale
Safe and stable operation, the fault in system allow for by quick, accurately and reliably excise, and will avoid the occurrence of sternly in the moment
The system disturbance of weight.As the protection system of new generation based on wide area measurement and wide-area communication, depend on computer and lead to
The development of letter technology, Wide area protection system is closely related with the safety and stability problem of large-scale interconnected power system.Consider
The safety of system and the safety of electrical equipment, in system jam or abnormal conditions, wide area protection not only it has to be ensured that
The safety of electrical equipment, the stable operation of power system more to be guaranteed, thus realize simultaneously relay protection and automatically control double
Weight function.
Power system operating experience for many years shows, quickly excises fault, reduces fault current to the impact of system all the time
It is to ensure that power system safety and stability runs maximally effective means.Because the movement time of traditional back-up protection is long, cooperation is complicated,
Thus Wide-area Measurement Information being introduced back-up protection and constituting wide area backup protection system and can improve complicated electric power system further
Safety and stability performance.In wide area self adaptation backup protection system for damping, most crucial problem is how to realize fast and accurately event
Barrier element positioning, yet further excises fault current, thus reducing the impact to whole system.Protection as complete set
Scheme, wide area protection can not only provide corresponding element protection, and can ensure that the safe and stable operation of system.In wide area
In adaptive guard system, relay protection and automaton can combine together, and cooperate and coordination.
Then, in order to ensure interconnecting the safe and stable operation of Complex Power Network on a large scale, serve wide area self adaptation back-up protection system
The fault detection method of system just becomes the problem demanding prompt solution being faced about technical staff.
Content of the invention
The technical problem to be solved is to provide under a kind of interference in strong gaussian random, serves wide area adaptive
Answer the fault detection method of backup protection system for damping, thus realizing fast and accurately fault element positioning, to guarantee power system
Safe and stable operation.
The present invention solves its technical problem and employed technical scheme comprise that：
A kind of fault detection method in wide area backup protection system, the method comprising the steps of：
A. utilize the wide area measurement information in power system actual moving process, using voltage acquisition vector and/or current acquisition
Vector, as original property variable, has taken into full account the impact of gaussian random interference, in the primitive attribute variable being gathered, all
Additional strong gaussian random interference, goes to step b；
B. calculate the contingency table that addition of the lower primitive attribute variable of strong gaussian random interference, go to step c；
The contingency table normalization of the primitive attribute variable c. additional strong gaussian random being disturbed, and calculate normalized matrix, turn step
Rapid d；
D. calculate row section and the row section of normalization primitive attribute variable contingency table, go to step e；
E. it is based respectively on the row and column section of normalization primitive attribute variable contingency table, calculate data conversion matrix, go to step
f；
If f. characterizing the dimension that electric parameters gather informationMore than the dimension characterizing acquisition time information, then go to step g, no
Then, go to step h；
G. it is based primarily upon electric parameters collection information, the method using feature is extracted based on the factor, extract the ratio characteristics of electric parameters,
Go to step i；In the fault detection method in wide area backup protection system, gather, based on electric parameters, the factor spy that information is extracted
Levy, be in conjunction with total inertiaFurther determine that；
H. it is based primarily upon time collection information, the method using feature is extracted based on the factor, extract the ratio characteristics of time information,
Go to step j；In the fault detection method in wide area backup protection system, the ratio characteristics that extracted based on time information,
In conjunction with total inertiaFurther determine that；
I. calculate total inertia, go to step k；
J. calculate total inertia, go to step l；
K. calculate the common factor feature of simultaneously extraction system fault, go to step m；Fault detect in wide area backup protection system
In method, according to total inertiaDetermine the corresponding dimension required for feature extraction, and under corresponding dimension, determine related elements
Maximum corresponding dimension scores, and thereby determine that the common factor feature gathering information based on electric parameters；
L. calculate the common factor feature of simultaneously extraction system fault, go to step m；Fault detect in wide area backup protection system
In method, according to total inertiaDetermine the corresponding dimension required for feature extraction, and under corresponding dimension, determine related elements
Maximum corresponding dimension scores, and thereby determine that the common factor feature based on time information；
M. calculate the resultant fault feature of primitive attribute variable, go to step n；
N. comprehensive aforesaid fault signature, is finally completed complicated electric power system quickly and accurately fault detect and isolation.
Further, the fault detection method in wide area backup protection system, in step m, comprehensive two classes are based respectively on electrically
Amount and the fault signature of collection time information, can be unified in the failure detection result of final realization, if two category feature knots
Really inconsistent, then reselect primitive attribute variable.
Further, the fault detection method in wide area backup protection system, for avoiding umber of defectives during information gathering
According to impact, the primitive attribute variable of corresponding selection, carry out missing values analysis；If there is no missing values, then after proceeding
Continuous feature analysiss；Otherwise, first supply missing values, then carry out subsequent analysis.
Further, the fault detection method in wide area backup protection system, described primitive attribute variable is asymmetric short
In phase voltage in the fault of road, negative sequence voltage, positive sequence voltage, phase current, negative-sequence current, forward-order current, symmetrical short-circuit fault
Positive sequence voltage and forward-order current.
The present invention serves primarily in wide area backup protection system, by taking into full account the impact of strong gaussian random interference, carries
A kind of failure detection schemes based on WAMS real-time measurement information are gone out.The methods described of the present invention has very strong
Capacity of resisting disturbance, disclosure satisfy that the requirement of system redundancy.The methods described of the present invention disclosure satisfy that wide area backup protection system
Requirement to fault location real-time and accuracy.Additionally, the present invention also has clear thinking, simple operation and other advantages.
Brief description
Fig. 1 is the fault detect flow chart in wide area backup protection system under the interference of strong gaussian random.
Fig. 2 is the ieee standard detecting system in embodiment.
Fig. 3 is the fault detect Comprehensive analysis results in wide area backup protection system.
In accompanying drawing,, the dimension of electric parameters collection information；, the dimension of acquisition time information；, data conversion matrix.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, implement below in conjunction with the present invention
Example in the drawings and specific embodiments, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that
Described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the enforcement in the present invention
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, broadly fall into
The scope of protection of the invention.
The present invention proposes the fault detection method in a kind of wide area backup protection system.Key technology is to take into full account
Random disturbances under strong Gaussian noise background, are based respectively on electric parameters collection information and temporal information extracts fault signature, then lead to
Cross integrated treatment, final realization is reliable, quickly and accurately fault detect.
According to the flow chart of Fig. 1, table 1 is for ieee standard detecting system（This ieee standard detecting system such as Fig. 2）,
During carrying out original electrical amount information gathering, it is attached to the strong gaussian random disturbance on node negative sequence voltage.For IEEE mark
Quasi- detecting system, pre-sets single-phase grounding fault at, and node 18 is actual abort situation, is imitated by BPA
Very, each cycle corresponding output once corresponding variate-value in electric quantity information gatherer process, then the node negative phase-sequence electricity by actual measurement
Pressure information adds strong gaussian random interference further, as shown in table 1, then be based respectively on electric parameters collection information and when
Between information extract fault signature respectively.
It is attached to the strong gaussian random interference on node negative sequence voltage in table 1 ieee standard detecting system
The summarized results that table 2 is analyzed for inertia.In the present embodiment, by road wheel exterior feature and the sign of computational representation electric quantity information
The row profile of temporal information, can calculate the summarized results of relevant inertia analysis further, wherein calculated be always used to
Measure as 0.457, and the first latitude variable account for the 74.2% of total inertia, the second latitude variable account for the 25.3% of total inertia, and
And the variable of the first two dimension account for the 99.5% of total inertia, therefore, we extract fault signature during, mainly
Variable for this two dimensions is carried out.
Table 2 inertia analyzes Macro or mass analysis
By the loading matrix of fault compression, through suitable rotation, it is special that we can obtain general I class fault compression
Levy：Factor coefficient.Table 3 is the Factor load-matrix under asymmetry short circuit fault.
It is calculated the scores of corresponding first latitude of each node and the second latitude further.Table 3 is based on node
The row analysis feature of negative sequence voltage, and it is based on the first dimension, in the middle of the score of all of first dimension, BUS18 node
3.184 must be divided into, be that whole nodes are maximum in the score of the first dimension, based on this it is possible to determine that BUS18 is tentatively
Abort situation.
Row analysis based on node negative sequence voltage in table 3 ieee standard detecting system
During resultant fault detection and analysis, the second latitude feature of corresponding time, also contain that abundant to be related to system former
The information of barrier.Table 4 is the row analysis result in ieee standard detecting system based on node negative sequence voltage.
Here the starting point is second latitude of sign time, gathers the calculating knot about row for the moment according to characterization information
Fruit it can be seen that the TIME1 moment, must be divided into 1.302 based on the second dimension, is similarly maximum in corresponding second dimension scores
, then, we can be determined that, fault is to terminate, in the TIME1 moment, the time that the TIME2 moment starts in other words, should
Analysis result is fitted like a glove with practical situation.
Row analysis based on node negative sequence voltage in table 4 ieee standard detecting system
A kind of fault detection method in wide area backup protection system, in the present embodiment, according to above first dimension and
The result of calculation of two latitudes, analysis result may finally be incorporated in the Comprehensive analysis results of Fig. 3.Fig. 3 protects for wide area standby
Fault detect Comprehensive analysis results in protecting system.Analysis Fig. 3 in as a result, it is possible to reach a conclusion, BUS18 is deposited with other nodes
In significant difference, for definite abort situation；And BUS18 has been mainly distributed in the scope of TIME2, therefore, it can judge,
The system failure should occur the BUS18 node in the TIME2 moment, and this conclusion is completely the same with practical situation.Then, Wo Menshi
Show completely quick, accurate, reliable fault fault.
Claims (5)
1. the fault detection method in a kind of wide area backup protection system is it is characterised in that gather wide in Operation of Electric Systems
Domain measurement information, using voltage acquisition vector and/or current acquisition vector as primitive attribute variable, and to described primitive attribute
Variable adds strong gaussian random interference.
2. according to claim 1 the fault detection method in a kind of wide area backup protection system it is characterised in that concrete wrap
Include following steps：
A. utilize the wide area measurement information in power system actual moving process, using voltage acquisition vector and/or current acquisition
As original property variable, in the primitive attribute variable being gathered, all additional strong gaussian random disturbs vector, goes to step b；
B. calculate the contingency table that addition of the lower primitive attribute variable of strong gaussian random interference, go to step c；
The contingency table normalization of the primitive attribute variable c. additional strong gaussian random being disturbed, and calculate normalized matrix, turn step
Rapid d；
D. calculate row section and the row section of normalization primitive attribute variable contingency table, go to step e；
E. it is based respectively on the row and column section of normalization primitive attribute variable contingency table, calculate data conversion matrix, go to step f；
If f. characterizing the dimension that electric parameters gather informationMore than the dimension characterizing acquisition time information, then go to step g, no
Then, go to step h；
G. it is based on electric parameters and gathers information, extract the ratio characteristics of electric parameters, go to step i；
H. the time that is based on gathers information, extracts the ratio characteristics of time information, goes to step j；
I. calculate total inertia, go to step k；
J. calculate total inertia, go to step l；
K. calculate the common factor feature of simultaneously extraction system fault, go to step m；
L. calculate the common factor feature of simultaneously extraction system fault, go to step m；
M. calculate the resultant fault feature of primitive attribute variable, go to step n；
N. comprehensive aforesaid fault signature, is finally completed complicated electric power system quickly and accurately fault detect and isolation.
3. the fault detection method in a kind of wide area backup protection system according to claim 2 is it is characterised in that step
Resultant fault described in m is characterized as the comprehensive fault signature being based respectively on electric parameters and collection time information, if two category features
Result is inconsistent, then reselect primitive attribute variable.
4. the fault detection method in a kind of wide area backup protection system according to claim 2 is it is characterised in that step
In a, the primitive attribute variable of corresponding selection, carry out missing values analysis；If there is no missing values, then proceed follow-up spy
Levy analysis；Otherwise, first supply missing values, then carry out subsequent analysis.
5. the fault detection method in a kind of wide area backup protection system according to claim 2 is it is characterised in that described
Primitive attribute variable is the phase voltage in asymmetry short circuit fault, negative sequence voltage, positive sequence voltage, phase current, negative-sequence current, positive sequence
Positive sequence voltage in electric current, symmetrical short-circuit fault and forward-order current.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323661A (en) * | 2019-11-29 | 2020-06-23 | 国网浙江省电力有限公司杭州供电公司 | On-site protection device overhauling method |
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| CN111323661A (en) * | 2019-11-29 | 2020-06-23 | 国网浙江省电力有限公司杭州供电公司 | On-site protection device overhauling method |
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