CN106026021A - Method for identifying protective action fault recording graph - Google Patents
Method for identifying protective action fault recording graph Download PDFInfo
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- CN106026021A CN106026021A CN201610504274.3A CN201610504274A CN106026021A CN 106026021 A CN106026021 A CN 106026021A CN 201610504274 A CN201610504274 A CN 201610504274A CN 106026021 A CN106026021 A CN 106026021A
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- Prior art keywords
- fault
- protection act
- data
- phase
- fault oscillograph
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
Abstract
The invention discloses a method for identifying a protective action fault recording graph. The method comprises: a protective action fault recording graph that is generated when a short-circuit fault occurs at a transformer of a transformer substation; tripping fault data of a relay protection unit are obtained and a vector diagram is drawn based on the tripping fault data; the data of the protective action fault recording graph are compared with the vector diagram data; when the data of the protective action fault recording graph are consistent with the vector diagram data, the transformer fault is identified based on the protective action fault recording graph. According to the method, when a single-phase ground short-circuit fault, an inter-phase short-circuit fault, or an inter-phase ground short-circuit fault occurs at any side ( a high-voltage side of a low-voltage side) of the two sides of the main transformer, the vector diagram and the fault recording graph are combined to analyze the fault, so that the analysis result is accurate. The method has high universality and the great popularization effect.
Description
Technical field
The present invention relates to technical field of power systems, particularly relate to a kind of protection act fault record
Ripple figure recognition methods.
Background technology
When main transformer breaks down and after protection device action, professional will be to protection act
Fault oscillograph is identified analyzing, it is judged that protection act record ripple diagram data is the most correct.
Especially when main transformer is short-circuited fault, short circuit phase voltage reduces and electric current increases and phase
Position also can change, and each phase current of main transformer both sides, voltage phasor also there occurs simultaneously
Change, makes technical staff that the identification of main transformer protection action failure record ripple figure is produced puzzlement.
Main transformer system wiring diagram as it is shown in figure 1, wherein TA be current transformer, 1DL,
2DL, 3DL are chopper, as a example by trouble point d is between the 3rd TA and main transformer.
The mode of connection of main transformer is: uprises side after TA and 1DL, is respectively connected to 1M bus
With 2M bus；In change, side is after the 2nd TA and 2DL, is respectively connected to 1M bus and 2M
Bus；Step-down side, after the 3rd TA and 3DL, is directly accessed 1M bus；AB phase is alternate
Shown in short trouble such as d point.
After transforming plant main transformer differential protection trips, technical staff is on the scene and checks relevant protection
As in figure 2 it is shown, wherein, Ia Δ, Ib Δ, Ic Δ are low for tripping operation information print fault record ripple figure
Pressure side electric current；Ua Δ, Ub Δ, Uc Δ are low-pressure side voltage；IAY、IBY、ICYFor high pressure
Side electric current；UAY、UBY、UCYFor high side voltage.It is analyzed by Fig. 2, it would be possible to
It is judged as high-pressure side B phase ground short circuit fault immediately, because high-pressure side B phase voltage is zero, in
Property point is directly grounded, and during system generation Single Phase Metal ground short circuit, Earth Phase voltage will be zero,
This creates the terminal the judgement of mistake.Why can erroneous judgement？It is because main transformer high
Pressure side or low-pressure side be short-circuited fault time, it is impossible to correctly carry out main transformer high and low pressure both sides
Each phase current, voltage phasor-diagram and main transformer protection action failure record ripple figure combines analysis
And cause.In consideration of it, provide one more precisely protection act fault oscillograph identification side
Method is necessary.
Summary of the invention
It is an object of the invention to provide a kind of protection act fault oscillograph recognition methods, purpose exists
Easily lead in time solving and prior art only carries out accident analysis by protection act fault oscillograph
The problem causing erroneous judgement.
For solving above-mentioned technical problem, the present invention provides a kind of protection act fault oscillograph identification
Method, including:
Obtain substation transformer be short-circuited fault time generate protection act fault oscillograph；
Obtain protective relaying device tripping fault data, and draw according to described tripping fault data
Vector diagram；
The data of described protection act fault oscillograph are compared with the data of described vector diagram
Right；
When the data consistent of data and the described vector diagram of described protection act fault oscillograph,
By described protection act fault oscillograph, the fault of transformator is identified.
Alternatively, described vector diagram is current vector figure and/or voltage vector diagram.
Alternatively, the described data by described protection act fault oscillograph and described vector diagram
Data are compared and are included:
Low-pressure side, high-pressure side A phase short circuit current, B phase is obtained respectively short by current vector figure
Road electric current, the size of C phase short circuit current and direction；
Respectively with described protection act fault oscillograph in obtain low-pressure side, high-pressure side A phase short
Compare in road electric current, B phase short circuit current, the size of C phase short circuit current and direction.
Alternatively, the described data by described protection act fault oscillograph and described vector diagram
Data are compared and are included:
Low-pressure side, high-pressure side A phase short-circuit voltage, B phase is obtained respectively short by voltage vector diagram
Road voltage, the size of C phase short-circuit voltage and direction；
Respectively with described protection act fault oscillograph in obtain low-pressure side, high-pressure side A phase short
Compare in road voltage, B phase short-circuit voltage, the size of C phase short-circuit voltage and direction.
Alternatively, also include:
Data and described current vector figure and/or voltage when described protection act fault oscillograph
When the data of vector diagram are inconsistent, reacquire described protection act fault oscillograph and be analyzed.
The most also include:
Described protection act fault oscillograph is shown.
Protection act fault oscillograph recognition methods provided by the present invention, by obtaining transformer station
Transformator be short-circuited fault time generate protection act fault oscillograph；Acquisition relay protection fills
Put tripping fault data, and draw vector diagram according to tripping fault data；By protection act fault
The data of record ripple figure are compared with the data of vector diagram；Number when protection act fault oscillograph
According to during with the data consistent of vector diagram, by the protection act fault oscillograph fault to transformator
It is identified.Visible, protection act fault oscillograph recognition methods provided by the present invention, energy
Enough any sides (high-pressure side or low-pressure side) in main transformer both sides occur single-phase earthing short
When road, phase fault, alternate ground short circuit, by vector diagram is combined with fault oscillograph
Being analyzed fault, analysis result accuracy rate is higher, has versatility and well promotes
Application effect.
Accompanying drawing explanation
For the clearer explanation embodiment of the present invention or the technical scheme of prior art, below will
The accompanying drawing used required in embodiment or description of the prior art is briefly described, aobvious and easy
Insight, the accompanying drawing in describing below is only some embodiments of the present invention, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 is main transformer step-down AB phase phase fault system wiring figure；
Fig. 2 is protection act fault oscillograph during main transformer step-down AB phase phase fault；
Fig. 3 is a kind of concrete of protection act fault oscillograph recognition methods provided by the present invention
The flow chart of embodiment；
Fig. 4 is the another kind of tool of protection act fault oscillograph recognition methods provided by the present invention
The flow chart of body embodiment；
Fig. 5 is another tool of protection act fault oscillograph recognition methods provided by the present invention
The flow chart of body embodiment；
Fig. 6 is low-pressure side electric current phasor figure during main transformer step-down AB phase phase fault；
Fig. 7 is high voltage side current phasor diagram during main transformer step-down AB phase phase fault；
Fig. 8 is low-pressure side voltage phasor-diagram during main transformer step-down AB phase phase fault；
Fig. 9 is high side voltage phasor diagram during main transformer step-down AB phase phase fault.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings
The present invention is described in further detail with detailed description of the invention.Obviously, described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
The one of protection act fault oscillograph recognition methods provided by the present invention is embodied as
The flow chart of mode is as it is shown on figure 3, the method includes:
Step S101: obtain substation transformer be short-circuited fault time generate protection act therefore
Barrier record ripple figure；
Step S102: obtain protective relaying device tripping fault data, and according to described tripping operation event
Barrier data draw vector diagram；
Step S103: by the number of the data of described protection act fault oscillograph Yu described vector diagram
According to comparing；
Step S104: when data and the number of described vector diagram of described protection act fault oscillograph
According to time consistent, by described protection act fault oscillograph, the fault of transformator is identified.
Protection act fault oscillograph recognition methods provided by the present invention, by obtaining transformer station
Transformator be short-circuited fault time generate protection act fault oscillograph；Acquisition relay protection fills
Put tripping fault data, and draw vector diagram according to tripping fault data；By protection act fault
The data of record ripple figure are compared with the data of vector diagram；Number when protection act fault oscillograph
According to during with the data consistent of vector diagram, by the protection act fault oscillograph fault to transformator
It is identified.Visible, protection act fault oscillograph recognition methods provided by the present invention, energy
Enough any sides (high-pressure side or low-pressure side) in main transformer both sides occur single-phase earthing short
When road, phase fault, alternate ground short circuit, by vector diagram is combined with fault oscillograph
Being analyzed fault, analysis result accuracy rate is higher, has versatility and well promotes
Application effect.
It is pointed out that protection act fault oscillograph provided by the present invention can be specially
Current vector figure or voltage vector diagram or the combination of the two, this does not the most affect the realization of the present invention.
When using current vector figure, protection act fault oscillograph identification provided by the present invention
As shown in Figure 4, the method includes the flow chart of the another kind of detailed description of the invention of method:
Step S201: obtain substation transformer be short-circuited fault time generate protection act therefore
Barrier record ripple figure；
Step S202: obtain protective relaying device tripping fault data, and according to described tripping operation event
Barrier data draw current vector figure；
Step S203: obtain low-pressure side, high-pressure side A phase respectively by current vector figure short-circuit
Electric current, B phase short circuit current, the size of C phase short circuit current and direction；
Step S204: respectively with the low-pressure side of acquisition, height in described protection act fault oscillograph
Pressure side A phase short circuit current, B phase short circuit current, the size of C phase short circuit current and direction are entered
Row comparison；
Step S205: when data and the number of current vector figure of described protection act fault oscillograph
According to time consistent, by described protection act fault oscillograph, the fault of transformator is identified.
Similarly, when using voltage vector diagram, protection act fault provided by the present invention is recorded
The flow chart of another detailed description of the invention of ripple figure recognition methods is as it is shown in figure 5, the method bag
Include:
Step S301: obtain substation transformer be short-circuited fault time generate protection act therefore
Barrier record ripple figure；
Step S302: obtain protective relaying device tripping fault data, and according to described tripping operation event
Barrier data draw voltage vector diagram；
Step S303: obtained low-pressure side, high-pressure side A phase respectively by voltage vector diagram short-circuit
Voltage, B phase short-circuit voltage, the size of C phase short-circuit voltage and direction；
Step S304: respectively with the low-pressure side of acquisition, height in described protection act fault oscillograph
Pressure side A phase short-circuit voltage, B phase short-circuit voltage, the size of C phase short-circuit voltage and direction are entered
Row comparison；
Step S305: when data and the number of voltage vector diagram of described protection act fault oscillograph
According to time consistent, by described protection act fault oscillograph, the fault of transformator is identified.
Refer to Fig. 1, as a example by main transformer step-down AB phase phase fault, below to employing
The recognition methods of the protection act fault oscillograph that phasor diagram combines with fault oscillograph is entered
One step elaborates.
Protection act fault record in the present embodiment, during main transformer step-down AB phase phase fault
Ripple figure is as shown in Figure 2.
Low-pressure side electric current phasor figure during main transformer step-down AB phase phase fault is as shown in Figure 6.
Wherein, Ia1、Ib1、Ic1For low-pressure side a, b, c phase positive sequence short circuit current；Ia2、Ib2、Ic2
For low-pressure side a, b, c phase negative phase-sequence short circuit current；Ia, Ib are low-pressure side a, b phase short circuit current,
Because Ic1With Ic2It is equal in magnitude in opposite direction, so c phase short circuit current Ic is zero.
High voltage side current phasor diagram during main transformer step-down AB phase phase fault is as shown in Figure 7.
Wherein, IA1、IB1、IC1For high-pressure side A, B, C phase positive sequence short circuit current；IA2、IB2、
IC2For high-pressure side A, B, C phase negative phase-sequence short circuit current；IA, IB, IC are high-pressure side A, B,
C phase short circuit current.
Low-pressure side voltage phasor-diagram during main transformer step-down AB phase phase fault is as shown in Figure 8.
Wherein, Ua1、Ub1、Uc1For low-pressure side a, b, c phase positive sequence short-circuit voltage；Ua2、Ub2、
Uc2For low-pressure side a, b, c phase negative phase-sequence short-circuit voltage；Ua, Ub, Uc be low-pressure side a, b,
C phase short-circuit voltage.
High side voltage phasor diagram during main transformer step-down AB phase phase fault is as shown in Figure 9.
Wherein, UA1、UB1、UC1For high-pressure side A, B, C phase positive sequence short-circuit voltage；UA2、
UB2、UC2For high-pressure side A, B, C phase negative phase-sequence short-circuit voltage；UA, UC be high-pressure side A,
C phase short-circuit voltage；Because UB1With UB2Equal in magnitude in opposite direction, so B phase short circuit electricity
Pressure UB is zero.
From electric current phasor figure Fig. 6, knowable to 7:
Low-pressure side electric current: c phase short circuit current Ic is zero, and a, b phase short circuit current Ia, Ib is big
Little equal, in opposite direction.
High voltage side current: the size of B phase short circuit current IB is A, C phase short circuit current IA, IC
Twice, and in opposite direction with A, C phase short circuit current, A, C phase short circuit current direction
Identical；
Knowable to main transformer protection action failure record ripple figure Fig. 2:
Low-pressure side electric current: c phase short circuit current Ic Δ is zero, a, b phase short circuit current Ia Δ, Ib
Δ is equal in magnitude, in opposite direction.
High voltage side current: B phase short circuit current IBYSize be A, C phase short circuit current IAY、
ICYTwice, and in opposite direction with A, C phase short circuit current, A, C phase short circuit current side
To identical
Analyze and understand: the data of protection act fault oscillograph and the data one of current vector figure
Cause.
From voltage phasor-diagram Fig. 8, knowable to 9:
Low-pressure side voltage: c phase short-circuit voltage Uc is normal voltage；A, b phase short-circuit voltage
Ua, Ub are equal in magnitude, direction is identical and be the half of c phase voltage, and contrary with c phase.
High side voltage: B phase short-circuit voltage UB is zero；A, C phase short-circuit voltage UA,
UC is equal in magnitude, in opposite direction.
Knowable to main transformer protection action failure record ripple figure Fig. 2:
Low-pressure side voltage: c phase short-circuit voltage Uc Δ is normal voltage；A, b phase short-circuit voltage
Ua Δ, Ub Δ is equal in magnitude, direction is identical and be the half of c phase voltage, and contrary with c phase.
High side voltage: B phase short-circuit voltage UBYIt is zero；A, C phase short-circuit voltage UAY、
UCYEqual in magnitude, in opposite direction.
Analyze and understand: the data of protection act fault oscillograph and the data one of voltage vector diagram
Cause.
When the data consistent of data and the described vector diagram of protection act fault oscillograph, pass through
The fault of transformator is identified by described protection act fault oscillograph.Further, upper
On the basis of stating any embodiment, the present embodiment can further include: when described protection is moved
The data of the data and described current vector figure and/or voltage vector diagram of making fault oscillograph differ
During cause, reacquire described protection act fault oscillograph and be analyzed.
It is also possible to include:
Described protection act fault oscillograph is shown.
To sum up, protection act fault oscillograph recognition methods provided by the present invention, by obtaining
Substation transformer be short-circuited fault time generate protection act fault oscillograph；Obtain relay
Protection device tripping fault data, and draw vector diagram according to tripping fault data；Protection is moved
The data of the data and vector diagram of making fault oscillograph are compared；When protection act failure wave-recording
During the data consistent of the data of figure and vector diagram, by protection act fault oscillograph to transformator
Fault be identified.Visible, protection act fault oscillograph identification side provided by the present invention
Method, it is possible to any side (high-pressure side or low-pressure side) in main transformer both sides occurs single-phase
When ground short circuit, phase fault, alternate ground short circuit, by by vector diagram and fault oscillograph
Combining and be analyzed fault, analysis result accuracy rate is higher, has versatility and very well
Popularization and application effect.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment emphasis is said
Bright is all the difference with other embodiments, same or similar part between each embodiment
See mutually.For device disclosed in embodiment, disclosed in itself and embodiment
Method is corresponding, so describe is fairly simple, relevant part sees method part and illustrates.
Professional further appreciates that, describes in conjunction with the embodiments described herein
The unit of each example and algorithm steps, it is possible to electronic hardware, computer software or the two
Be implemented in combination in, in order to clearly demonstrate the interchangeability of hardware and software, in described above
In generally described composition and the step of each example according to function.These functions are actually
Perform with hardware or software mode, depend on application-specific and the design constraint of technical scheme
Condition.Each specifically should being used for can be used different methods to realize institute by professional and technical personnel
The function described, but this realization is it is not considered that beyond the scope of this invention.
The method described in conjunction with the embodiments described herein or the step of algorithm can be direct
Implement with hardware, the software module of processor execution, or the combination of the two.Software module
Random access memory (RAM), internal memory, read only memory (ROM), electrically programmable can be placed in
ROM, electrically erasable ROM, depositor, hard disk, moveable magnetic disc, CD-ROM,
Or in any other form of storage medium well known in technical field.
Above protection act fault oscillograph recognition methods provided by the present invention is carried out in detail
Thin introduction.Principle and the embodiment of the present invention are explained by specific case used herein
Stating, the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.
It should be pointed out that, for those skilled in the art, former without departing from the present invention
On the premise of reason, it is also possible to the present invention is carried out some improvement and modification, these improve and modify
Also fall in the protection domain of the claims in the present invention.
Claims (6)
1. a protection act fault oscillograph recognition methods, it is characterised in that including:
Obtain substation transformer be short-circuited fault time generate protection act fault oscillograph；
Obtain protective relaying device tripping fault data, and draw according to described tripping fault data
Vector diagram；
The data of described protection act fault oscillograph are compared with the data of described vector diagram
Right；
When the data consistent of data and the described vector diagram of described protection act fault oscillograph,
By described protection act fault oscillograph, the fault of transformator is identified.
2. protection act fault oscillograph recognition methods as claimed in claim 1, its feature
Being, described vector diagram is current vector figure and/or voltage vector diagram.
3. protection act fault oscillograph recognition methods as claimed in claim 2, its feature
It is, described the data of described protection act fault oscillograph is entered with the data of described vector diagram
Row comparison includes:
Low-pressure side, high-pressure side A phase short circuit current, B is obtained respectively by described current vector figure
Phase short circuit current, the size of C phase short circuit current and direction；
Respectively with described protection act fault oscillograph in obtain low-pressure side, high-pressure side A phase short
Compare in road electric current, B phase short circuit current, the size of C phase short circuit current and direction.
4. protection act fault oscillograph recognition methods as claimed in claim 2, its feature
It is, described the data of described protection act fault oscillograph is entered with the data of described vector diagram
Row comparison includes:
Low-pressure side, high-pressure side A phase short-circuit voltage, B is obtained respectively by described voltage vector diagram
Phase short-circuit voltage, the size of C phase short-circuit voltage and direction；
Respectively with described protection act fault oscillograph in obtain low-pressure side, high-pressure side A phase short
Compare in road voltage, B phase short-circuit voltage, the size of C phase short-circuit voltage and direction.
5. the protection act fault oscillograph identification side as described in any one of claim 2 to 4
Method, it is characterised in that also include:
Data and described current vector figure and/or voltage when described protection act fault oscillograph
When the data of vector diagram are inconsistent, reacquire described protection act fault oscillograph and be analyzed.
6. protection act fault oscillograph recognition methods as claimed in claim 5, its feature
It is, also includes:
Described protection act fault oscillograph is shown.
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| CN201610504274.3A CN106026021A (en) | 2016-06-28 | 2016-06-28 | Method for identifying protective action fault recording graph |
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| CN201610504274.3A CN106026021A (en) | 2016-06-28 | 2016-06-28 | Method for identifying protective action fault recording graph |
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| CN111756025A (en) * | 2020-06-29 | 2020-10-09 | 深圳供电局有限公司 | Method and system for judging line differential protection action based on power grid fault recording diagram |
| CN112068037A (en) * | 2020-08-21 | 2020-12-11 | 深圳供电局有限公司 | YNd11 wiring transformer asymmetric fault analysis method and system |
| CN112083372A (en) * | 2020-08-21 | 2020-12-15 | 深圳供电局有限公司 | Current transformer polarity identification method and system |
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| CN112068037A (en) * | 2020-08-21 | 2020-12-11 | 深圳供电局有限公司 | YNd11 wiring transformer asymmetric fault analysis method and system |
| CN112083372A (en) * | 2020-08-21 | 2020-12-15 | 深圳供电局有限公司 | Current transformer polarity identification method and system |
| CN112083372B (en) * | 2020-08-21 | 2023-12-15 | 深圳供电局有限公司 | Polarity identification method and system for current transformer |
| CN112068037B (en) * | 2020-08-21 | 2024-02-23 | 深圳供电局有限公司 | Asymmetric fault analysis method and system for YNd11 wiring transformer |
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Application publication date: 20161012 |