CN107192917A - Anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect - Google Patents
Anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect Download PDFInfo
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- CN107192917A CN107192917A CN201710380105.8A CN201710380105A CN107192917A CN 107192917 A CN107192917 A CN 107192917A CN 201710380105 A CN201710380105 A CN 201710380105A CN 107192917 A CN107192917 A CN 107192917A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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Abstract
This application discloses anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect, wherein, the experimental method includes：Short circuit experiment is carried out to a phase winding of transformer, a short circuit current flow when phase winding is damaged is determined；Choose the proportional current of multiple varying strengths, multiple short circuit experiment is carried out to other any phase windings of transformer, measure and store the situation of change of the anti-short circuit capability of transformer caused by multiple cumulative effect, wherein, the intensity of the proportional current is in the predetermined strength proportion of the short circuit current flow and less than the short circuit current flow；Carry out the short circuit experiment of different throughput times respectively to last phase winding of the transformer using the short circuit current flow, measure and store the situation of change of anti-short circuit capability caused by throughput time cumulative effect.The technical scheme of the application, can accurately measuring transformer tire out cumulative effect caused by anti-short circuit capability situation of change.
Description
Technical field
The application is related to transformer technology field, more particularly to a kind of anti-short circuit capability reality of transformer under cumulative effect
Test method and system.
Background technology
With the gradually expansion of power system capacity, in the growth of the fortune main transformer time limit, Transformer Winding stability and its tired
The research of product effect turns into a focus and difficulties.Transformer act as the function of shift voltage in power system, because
This effect in power system is particularly significant.Correspondingly, the safe operation of transformer turns into the emphasis that power domain is paid close attention to.
Transformer short-circuit damage is the main cause of transformer damage.Transformer short-circuit is damaged, and is that transformer is accumulating many
In the case of secondary short-circuit impact, built-in electrical insulation state changes, and ultimately results in the damaged condition that short circuit occurs in transformer.Becoming
Depressor winding is after accumulating multiple short-circuit impact, and internal insulation status may deteriorate, and can repeatedly add after short circuit accumulation
The deformation of acute Transformer Winding.And for occurring the transformer that short circuit is continued to run with, although first short circuit impacts simultaneously
Do not mean that winding deformation, the damage accident that built-in electrical insulation situation deteriorates occur immediately for transformer, but passed through again or repeatedly
Go through under big excessively stream or over-pressed impact condition, the anti-short circuit capability of transformer can persistently change, it would still be possible to there can be event
The generation of barrier.
The research of anti-short circuit capability not to transformer under cumulative effect, therefore in the prior art in the prior art
The situation of change of anti-short circuit capability of the transformer under cumulative effect can not accurately be understood.
The content of the invention
It is existing to solve this application provides anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect
The problem of having the situation of change that anti-short circuit capability of the transformer under cumulative effect can not be accurately understood in technology.
In a first aspect, the anti-short circuit capability experimental method this application provides a kind of transformer under cumulative effect, the party
Method includes：
Short circuit experiment is carried out to a phase winding of transformer, a short circuit current flow when phase winding is damaged is determined；
The proportional current of multiple varying strengths is chosen, multiple short circuit experiment is carried out to other any phase windings of transformer,
The situation of change of the anti-short circuit capability of transformer caused by multiple cumulative effect is measured and stores, wherein, the proportional current
Intensity is in the predetermined strength proportion of the short circuit current flow and less than the short circuit current flow；
Carry out the short circuit of different throughput times respectively to last phase winding of the transformer using the short circuit current flow
Experiment, measures and stores the situation of change of anti-short circuit capability caused by throughput time cumulative effect.
Alternatively, the phase winding to transformer carries out short circuit experiment, determines short when a phase winding is damaged
Road electric current includes：Electric current is applied to a phase winding of the transformer；Under the influence of judging the electric current, described one in the scheduled time
Whether the resistance change of phase winding exceedes the default variable quantity of rated resistance；If a phase winding in the scheduled time
Resistance change exceedes the default variable quantity, it is determined that the electric current is a short circuit current flow when phase winding is damaged.
Alternatively, other any phase windings of the transformer are entered by the proportional current for choosing multiple varying strengths
The multiple short circuit experiment of row, measures and stores the situation of change of the anti-short circuit capability of transformer caused by multiple cumulative effect, including：
Choose the proportional current of multiple varying strengths in the predetermined strength proportion；
According to preset order, respectively using the proportional current of all varying strengths, respectively to the transformer other
One phase winding carries out repeatedly the short circuit experiment of default throughput time, and any one of other winding is damaged described in；
Measure and store under the proportional currents of all varying strengths the electric power of transformer caused by short circuit experiment every time and
Transformer adds up deformation values.
Alternatively, last phase winding of the use Short-Circuit Current on Transformer carries out the short of different throughput times respectively
Road is tested, and measures and record the situation of change of the anti-short circuit capability of transformer caused by throughput time cumulative effect, including：
According to throughput time length order, correspondence throughput time is applied to last phase winding of the transformer successively
The short circuit current flow；
The electric power and transformer for measuring and storing transformer caused by different throughput times add up deformation values；
Proportional current is applied to last phase winding that different electric power and transformer add up the corresponding transformer of deformation values；
The short circuit current flow intensity when electric power and transformer add up deformation values corresponding transformer damage is counted, as
The anti-short circuit capability of transformer caused by throughput time cumulative effect.
Alternatively, described anti-short circuit capability experimental method, in addition to：According to the situation of change of the anti-short circuit capability,
Adjust the parameter of the winding of the transformer.
Second aspect, present invention also provides a kind of anti-short circuit capability experimental system of transformer under cumulative effect, bag
Include：
Short circuit current flow determining module, short circuit experiment is carried out to a phase winding of transformer, determines that a phase winding is damaged
When short circuit current flow；
First anti-short circuit capability measurement module, the proportional current for choosing multiple varying strengths, to other of transformer
Any phase winding carries out multiple short circuit experiment, measures and store the change of the anti-short circuit capability of transformer caused by multiple cumulative effect
Change situation, wherein, the intensity of the proportional current is in the predetermined strength proportion of the short circuit current flow and less than described short
Road electric current；
Second anti-short circuit capability measurement module, for using last phase winding of the short circuit current flow to the transformer
The short circuit experiment of different throughput times is carried out respectively, measures and store the change of anti-short circuit capability caused by throughput time cumulative effect
Change situation.
Alternatively, the short circuit current flow determining module, including：
First electric current applies submodule, and electric current is applied for the phase winding to the transformer；
Resistance change judging submodule, for judging the electric current under the influence of, a phase winding in the scheduled time
Whether resistance change exceedes the default variable quantity of rated resistance；
Electric current determination sub-module, if the resistance change for a phase winding in the scheduled time is more than described pre-
If variable quantity, it is determined that the electric current is a short circuit current flow when phase winding is damaged.
Alternatively, the first anti-short circuit capability measurement module, including：
Electric current chooses submodule, the proportional current for choosing multiple varying strengths in the predetermined strength proportion；
Short circuit experiment submodule, for according to preset order, uses the proportional current of all varying strengths, right respectively respectively
Other any phase windings of the transformer carry out repeatedly short circuit experiments of default throughput times, until it is described other any one of around
Group is damaged；
Under first electric power and accumulative distortion measurement submodule, the proportional current for measuring and storing all varying strengths
The electric power and transformer of transformer caused by each short circuit experiment add up deformation values.
Alternatively, the second anti-short circuit capability measurement module, including：
Second electric current applies submodule, for according to throughput time length order, successively to the transformer last
Phase winding applies the short circuit current flow of correspondence throughput time；
Second electric power and accumulative distortion measurement submodule, for measuring and storing transformer caused by different throughput times
Electric power and transformer add up deformation values；
3rd electric current applies submodule, for adding up the corresponding transformer of deformation values most to different electric power and transformer
Latter phase winding applies proportional current；
Current strength statistic submodule, adds up the corresponding transformer of deformation values and damages for counting the electric power and transformer
The short circuit current flow intensity of bad when, is used as the anti-short circuit capability of transformer caused by throughput time cumulative effect.
Alternatively, the anti-short circuit capability experimental system, in addition to：Parameter adjustment module, for according to the resistance to shorting
The situation of change of ability, adjusts the parameter of the winding of the transformer.
Anti-short circuit capability experimental program of the transformer that the technical scheme of the application is provided under cumulative effect, by becoming
One phase winding of depressor carries out short circuit experiment, short circuit current flow when being damaged so as to one phase winding of accurate determination.Then choose
The proportional current of varying strength carries out multiple short circuit experiment to other any phase windings of transformer, measures and stores multiple accumulation
The situation of change of the anti-short circuit capability of transformer caused by effect, tires out so as to accurate understanding current strength and through-flow number of times etc.
Influence of the product effect to the situation of change of the anti-short circuit capability of transformer.By using last phase of Short-Circuit Current on Transformer
Winding carries out the short circuit experiment of different throughput times, can accurately determine change of the throughput time cumulative effect to anti-short circuit capability
The influence of situation.To sum up, by above-mentioned experimental procedure, current strength, through-flow number of times and throughput time can be accurately determined tired
Influence of the product effect to the anti-short circuit capability of transformer.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of stream of anti-short circuit capability experimental method of the transformer that Fig. 1 is provided for the embodiment of the present application under cumulative effect
Journey schematic diagram；
Fig. 2 determines the flow chart of method for a kind of short circuit current flow that embodiment illustrated in fig. 1 is provided；
Fig. 3 stores up anti-short circuit capability situation of change caused by multiple cumulative effect for one kind that embodiment illustrated in fig. 1 is provided and surveyed
The schematic flow sheet of amount method；
Anti-short circuit capability situation of change caused by a kind of throughput time cumulative effect that Fig. 4 provides for embodiment illustrated in fig. 1
The schematic flow sheet of measuring method；
Anti-short circuit capability experimental method of second of the transformer that Fig. 5 is provided for the embodiment of the present application under cumulative effect
Schematic flow sheet；
A kind of knot of anti-short circuit capability experimental system of the transformer that Fig. 6 is provided for the embodiment of the present application under cumulative effect
Structure schematic diagram；
A kind of structural representation for short circuit current determining module that Fig. 7 provides for embodiment illustrated in fig. 6；
A kind of structural representation for first anti-short circuit capability measurement module that Fig. 8 provides for embodiment illustrated in fig. 6；
A kind of structural representation for second anti-short circuit capability measurement module that Fig. 9 provides for embodiment illustrated in fig. 6.
Embodiment
Referring to Fig. 1, a kind of anti-short circuit capability experiment side of the transformer provided for the embodiment of the present application under cumulative effect
The schematic flow sheet of method.As shown in figure 1, anti-short circuit capability experiment of the transformer of the embodiment of the present application offer under cumulative effect
Method, comprises the following steps：
S110：Short circuit experiment is carried out to a phase winding of transformer, a short circuit current flow when phase winding is damaged is determined.
By carrying out short circuit experiment to the phase winding of transformer one, a short circuit electricity when phase winding is damaged can be accurately determined
Stream, so as to accurately determine anti-short circuit capability of the transformer under cumulative effect.
Wherein, as shown in Fig. 2 step S110 comprises the following steps：
S111：Electric current is applied to a phase winding of transformer.
S112：Judge under the influence of electric current, whether the resistance change of a phase winding exceedes rated resistance in the scheduled time
Default variable quantity.
S113：If the resistance change of a phase winding exceedes default variable quantity in the scheduled time, it is determined that electric current is a phase
Short circuit current flow when winding is damaged.
Specifically, it can determine whether whether the resistance change of a phase winding in 0.25S exceedes the 2% of rated resistance, work as 0.25S
When the resistance change of an interior phase winding exceedes the 2% of rated resistance, the short circuit electricity when electric current damages for a phase winding is determined
Stream.
By judging under the influence of an electric current, whether the resistance change of a phase winding exceedes rated resistance in the scheduled time
Default variable quantity, can accurately judge short circuit current flow when whether electric current is phase winding damage.
S120：The proportional current of multiple varying strengths is chosen, multiple short circuit is carried out to other any phase windings of transformer
Experiment, measures and stores the situation of change of the anti-short circuit capability of transformer caused by multiple cumulative effect, wherein, proportional current
Intensity is in the predetermined strength proportion of short circuit current flow and less than short circuit current flow；
Repeatedly short circuit is carried out in fact to other any phase windings of transformer by the proportional current for choosing multiple varying strengths
Test, can accurately study varying strength cumulative effect and many number of times cumulative effects to the situation of change of transformer anti-short circuit capability
Influence.
Wherein, as shown in figure 3, step S120：Choose the proportional currents of multiple varying strengths to transformer other
One phase winding carries out multiple short circuit experiment, measures and store the change of the anti-short circuit capability of transformer caused by multiple cumulative effect
Situation, including：
S121：Choose the proportional current of multiple varying strengths in predetermined strength proportion.
S122：According to preset order, respectively using the proportional current of all varying strengths, respectively to transformer other
One phase winding carries out repeatedly the short circuit experiment of default throughput time, until any one of other winding is damaged.
S123：Measure and store under the proportional currents of all varying strengths every time the electronic of transformer caused by short circuit experiment
Power and transformer add up deformation values.
Specifically, the proportional current of 70%-90% short circuit current flow intensity can be chosen at, to transformer other it is any around
Group carries out multiple short-circuit test, and it is detailed then to add up deformed state to through-flow number of times, current strength, electronic force value and transformer
Record, and further apply electric current up to transformer damage, obtain under transformer experience repeat impact cumulative effect, transformer
Anti-short circuit capability situation of change.
Wherein, it is also optional in order to study the influence of varying strength and through-flow number of times to the anti-short circuit capability of Transformer Winding
Tested with the mutually same phase winding of different transformers.
S130：The short circuit for carrying out different throughput times respectively using last phase winding of Short-Circuit Current on Transformer is real
Test, measure and store the situation of change of anti-short circuit capability caused by throughput time cumulative effect.
Wherein, as shown in figure 4, step S130, comprises the following steps：
S131：According to throughput time length order, correspondence throughput time is applied to last phase winding of transformer successively
Short circuit current flow.
S132：The electric power and transformer for measuring and storing transformer caused by different throughput times add up deformation values.
S133：Ratio is applied to last phase winding that different electric power and transformer add up the corresponding transformer of deformation values
Electric current.
S134：Short circuit current flow intensity when electric power and transformer add up deformation values corresponding transformer damage is counted, is made
The anti-short circuit capability of transformer caused by throughput time cumulative effect.
Specifically, short-circuit test can be carried out to last phase winding of transformer, each throughput time is respectively t1=
0.1s, t2=0.2s, t3=0.25s, the proportional current of application are 100% short circuit current flow, obtain accumulation throughput time to change
The influence of the anti-short circuit capability of depressor.
To sum up, anti-short circuit capability experimental method of the transformer that the embodiment of the present application is provided under cumulative effect, by right
One phase winding of transformer carries out short circuit experiment, short circuit current flow when being damaged so as to one phase winding of accurate determination.Then select
Take the proportional current of varying strength to carry out multiple short circuit experiment to other any phase windings of transformer, measure and store repeatedly tired
The situation of change of the anti-short circuit capability of transformer caused by product effect, current strength and through-flow number of times etc. are understood so as to accurate
Influence of the cumulative effect to the situation of change of the anti-short circuit capability of transformer.By using last of Short-Circuit Current on Transformer
Phase winding carries out the short circuit experiment of different throughput times, can accurately determine change of the throughput time cumulative effect to anti-short circuit capability
The influence of change situation.To sum up, by above-mentioned experimental procedure, it can accurately determine that current strength, through-flow number of times and throughput time are tired
Influence of the product effect to the anti-short circuit capability of transformer.
As shown in figure 5, anti-short circuit capability experimental method of the transformer of embodiment illustrated in fig. 1 offer under cumulative effect,
It is further comprising the steps of：
S140：According to the situation of change of anti-short circuit capability, the parameter of the winding of transformer is adjusted.
Accumulation dash current intensity, through-flow number of times and throughput time are being obtained to transformer resistance to shorting energy by above-mentioned steps
After the influence of power, the parameter of the winding of adjustable transformer is further tested and improved transformer to transformer and resisted
Short-circuit capacity.
Based on same application design, it is real that the embodiment of the present invention additionally provides anti-short circuit capability of the transformer under cumulative effect
The embodiment of check system, is that the transformer in the embodiment of the present invention is anti-under cumulative effect due to the corresponding method of the system
Short-circuit capacity experimental method, and the principle of system solution problem is similar to method, therefore the implementation side of may refer to of system
The implementation of method, repeats part and repeats no more.
Refer to Fig. 6, a kind of anti-short circuit capability of the transformer that Fig. 6 is provided for the embodiment of the present application under cumulative effect is real
The structural representation of check system, as shown in fig. 6, the anti-short circuit capability experimental system includes：
Short circuit current flow determining module 101, carries out short circuit experiment, when determining that a phase winding is damaged to a phase winding of transformer
Short circuit current flow；
First anti-short circuit capability measurement module 102, the proportional current for choosing multiple varying strengths, to its of transformer
He carries out multiple short circuit experiment by any phase winding, measures and stores the anti-short circuit capability of transformer caused by multiple cumulative effect
Situation of change, wherein, the intensity of proportional current is in the predetermined strength proportion of short circuit current flow and less than short circuit current flow；
Second anti-short circuit capability measurement module 103, for being distinguished using last phase winding of Short-Circuit Current on Transformer
The short circuit experiment of different throughput times is carried out, the change feelings of anti-short circuit capability caused by throughput time cumulative effect are measured and store
Condition.
To sum up, anti-short circuit capability experimental system of the transformer that the embodiment of the present application is provided under cumulative effect, by right
One phase winding of transformer carries out short circuit experiment, short circuit current flow when being damaged so as to one phase winding of accurate determination.Then select
Take the proportional current of varying strength to carry out multiple short circuit experiment to other any phase windings of transformer, measure and store repeatedly tired
The situation of change of the anti-short circuit capability of transformer caused by product effect, current strength and through-flow number of times etc. are understood so as to accurate
Influence of the cumulative effect to the situation of change of the anti-short circuit capability of transformer.By using last of Short-Circuit Current on Transformer
Phase winding carries out the short circuit experiment of different throughput times, can accurately determine change of the throughput time cumulative effect to anti-short circuit capability
The influence of change situation.To sum up, by above-mentioned experimental procedure, it can accurately determine that current strength, through-flow number of times and throughput time are tired
Influence of the product effect to the anti-short circuit capability of transformer.
As shown in fig. 7, the short circuit current flow determining module 101 in Fig. 6, including：
First electric current applies submodule 1011, and electric current is applied for the phase winding to transformer；
Resistance change judging submodule 1012, for judging electric current under the influence of, the resistance of a phase winding in the scheduled time
Whether variable quantity exceedes the default variable quantity of rated resistance；
Electric current determination sub-module 1013, if the resistance change for a phase winding in the scheduled time exceedes default change
Amount, it is determined that electric current is a short circuit current flow when phase winding is damaged.
Alternatively, as shown in figure 8, the first anti-short circuit capability measurement module 102, including：
Electric current chooses submodule 1021, the proportional current for choosing multiple varying strengths in predetermined strength proportion；
Short circuit experiment submodule 1022, for according to preset order, the proportional current of all varying strengths being used respectively, is divided
Other other any phase windings to transformer carry out repeatedly the short circuit experiment of default throughput time, until any one of other winding is damaged
It is bad；
First electric power and accumulative distortion measurement submodule 1023, the ratio electricity for measuring and storing all varying strengths
The electric power and transformer for flowing down transformer caused by each short circuit experiment add up deformation values.
Alternatively, as shown in figure 9, the second anti-short circuit capability measurement module 103, including：
Second electric current applies submodule 1031, for according to throughput time length order, successively to transformer last
Phase winding applies the short circuit current flow of correspondence throughput time；
Second electric power and accumulative distortion measurement submodule 1032, become for measuring and storing caused by different throughput times
The electric power and transformer of depressor add up deformation values；
3rd electric current applies submodule 1033, for adding up the corresponding transformer of deformation values to different electric power and transformer
Last phase winding apply proportional current；
Current strength statistic submodule 1034, adds up the corresponding transformer of deformation values and damages for counting electric power and transformer
The short circuit current flow intensity of bad when, is used as the anti-short circuit capability of transformer caused by throughput time cumulative effect.
Alternatively, as shown in fig. 6, the present embodiment provide anti-short circuit capability experimental system, in addition to：Parameter adjustment module
104, for the situation of change according to anti-short circuit capability, adjust the parameter of the winding of transformer.
Between the embodiment of each in this specification identical similar part mutually referring to.Especially for ... implement
For example, because it is substantially similar to embodiment of the method, so description is fairly simple, related part is referring in embodiment of the method
Explanation.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (10)
1. a kind of anti-short circuit capability experimental method of transformer under cumulative effect, it is characterised in that including：
Short circuit experiment is carried out to a phase winding of transformer, a short circuit current flow when phase winding is damaged is determined；
The proportional current of multiple varying strengths is chosen, multiple short circuit experiment, measurement are carried out to other any phase windings of transformer
And the situation of change of the anti-short circuit capability of transformer caused by multiple cumulative effect is stored, wherein, the intensity of the proportional current
In the predetermined strength proportion of the short circuit current flow and less than the short circuit current flow；
Carry out the short circuit experiment of different throughput times respectively to last phase winding of the transformer using the short circuit current flow,
Measure and store the situation of change of anti-short circuit capability caused by throughput time cumulative effect.
2. anti-short circuit capability experimental method according to claim 1, it is characterised in that the phase winding to transformer
Short circuit experiment is carried out, a short circuit current flow when phase winding is damaged is determined, including：
Electric current is applied to a phase winding of the transformer；
Judge under the influence of the electric current, whether the resistance change of a phase winding exceedes the pre- of rated resistance in the scheduled time
If variable quantity；
If the resistance change of a phase winding exceedes the default variable quantity in the scheduled time, it is determined that the electric current
Short circuit current flow when being damaged for a phase winding.
3. anti-short circuit capability experimental method according to claim 1, it is characterised in that the multiple varying strengths of selection
Other any phase windings of transformer are carried out multiple short circuit experiments by proportional current, are measured and are stored multiple cumulative effect and cause
Transformer anti-short circuit capability situation of change, including：
Choose the proportional current of multiple varying strengths in the predetermined strength proportion；
According to preset order, other any phases using the proportional current of all varying strengths, respectively to the transformer respectively
Winding carries out repeatedly the short circuit experiment of default throughput time, and any one of other winding is damaged described in；
Measure and store under the proportional currents of all varying strengths the electric power and transformation of transformer caused by short circuit experiment every time
Device adds up deformation values.
4. the anti-short circuit capability experimental method according to claim 1 or 3, it is characterised in that the use short circuit current flow pair
Last phase winding of transformer carries out the short circuit experiment of different throughput times respectively, measures and records throughput time cumulative effect
The situation of change of the anti-short circuit capability of caused transformer, including：
According to throughput time length order, last phase winding of the transformer is applied described in correspondence throughput time successively
Short circuit current flow；
The electric power and transformer for measuring and storing transformer caused by different throughput times add up deformation values；
Proportional current is applied to last phase winding that different electric power and transformer add up the corresponding transformer of deformation values；
The short circuit current flow intensity when electric power and transformer add up deformation values corresponding transformer damage is counted, as through-flow
The anti-short circuit capability of transformer caused by accumulated time effect.
5. anti-short circuit capability experimental method according to claim 1, it is characterised in that also include：
According to the situation of change of the anti-short circuit capability, the parameter of the winding of the transformer is adjusted.
6. a kind of anti-short circuit capability experimental system of transformer under cumulative effect, it is characterised in that including：
Short circuit current flow determining module, carries out short circuit experiment to a phase winding of transformer, determines when a phase winding is damaged
Short circuit current flow；
First anti-short circuit capability measurement module, the proportional current for choosing multiple varying strengths, to transformer other are any
Phase winding carries out multiple short circuit experiment, measures and store the change feelings of the anti-short circuit capability of transformer caused by multiple cumulative effect
Condition, wherein, the intensity of the proportional current is in the predetermined strength proportion of the short circuit current flow and less than the short circuit electricity
Stream；
Second anti-short circuit capability measurement module, for being distinguished using the short circuit current flow last phase winding of the transformer
The short circuit experiment of different throughput times is carried out, the change feelings of anti-short circuit capability caused by throughput time cumulative effect are measured and store
Condition.
7. anti-short circuit capability experimental system according to claim 6, it is characterised in that the short circuit current flow determining module,
Including：
First electric current applies submodule, and electric current is applied for the phase winding to the transformer；
Resistance change judging submodule, for judging the electric current under the influence of, the resistance of a phase winding in the scheduled time
Whether variable quantity exceedes the default variable quantity of rated resistance；
Electric current determination sub-module, if the resistance change for a phase winding in the scheduled time exceedes the default change
Change amount, it is determined that the electric current is a short circuit current flow when phase winding is damaged.
8. anti-short circuit capability experimental system according to claim 6, it is characterised in that the first anti-short circuit capability measurement
Module, including：
Electric current chooses submodule, the proportional current for choosing multiple varying strengths in the predetermined strength proportion；
Short circuit experiment submodule, for according to preset order, respectively using the proportional current of all varying strengths, respectively to described
Other any phase windings of transformer carry out repeatedly the short circuit experiment of default throughput time, and any one of other winding is damaged described in
It is bad；
Under first electric power and accumulative distortion measurement submodule, the proportional current for measuring and storing all varying strengths every time
The electric power and transformer of transformer caused by short circuit experiment add up deformation values.
9. the anti-short circuit capability experimental system according to claim 6 or 8, it is characterised in that second anti-short circuit capability
Measurement module, including：
Second electric current apply submodule, for according to throughput time length order, successively to the transformer last around
Group applies the short circuit current flow of correspondence throughput time；
Second electric power and accumulative distortion measurement submodule, the electricity for measuring and storing transformer caused by different throughput times
Power and transformer add up deformation values；
3rd electric current applies submodule, for last to different electric power and the corresponding transformer of the accumulative deformation values of transformer
Phase winding applies proportional current；
Current strength statistic submodule, when adding up the corresponding transformer damage of deformation values for counting the electric power and transformer
Short circuit current flow intensity, be used as the anti-short circuit capability of transformer caused by throughput time cumulative effect.
10. anti-short circuit capability experimental system according to claim 6, it is characterised in that also include：
Parameter adjustment module, for the situation of change according to the anti-short circuit capability, adjusts the parameter of the winding of the transformer.
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| CN201710380105.8A CN107192917B (en) | 2017-05-25 | 2017-05-25 | The anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect |
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| CN201710380105.8A CN107192917B (en) | 2017-05-25 | 2017-05-25 | The anti-short circuit capability experimental method and system of a kind of transformer under cumulative effect |
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| CN110824383A (en) * | 2019-11-07 | 2020-02-21 | 国网天津市电力公司 | Method for calculating short circuit impact cumulative effect of transformer |
| CN112213601A (en) * | 2020-09-29 | 2021-01-12 | 国网福建省电力有限公司电力科学研究院 | Experimental device for simulating double-coil radial induced electric power impact accumulated deformation |
| CN112924897A (en) * | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Online evaluation method and device for short-circuit electrodynamic force of transformer |
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| CN115856709A (en) * | 2023-03-03 | 2023-03-28 | 深圳市鸿明机电有限公司 | Data processing method for sensor of power equipment |
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Effective date of registration: 20201029 Address after: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Patentee after: YUNNAN POWER GRID CO., LTD. ELECTRIC POWER Research Institute Address before: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Patentee before: YUNNAN POWER GRID CO., LTD. ELECTRIC POWER Research Institute Patentee before: SHENYANG TIANYUAN ELECTRIC Co.,Ltd. |