CN110057283A - A kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance - Google Patents
A kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance Download PDFInfo
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- CN110057283A CN110057283A CN201910180551.3A CN201910180551A CN110057283A CN 110057283 A CN110057283 A CN 110057283A CN 201910180551 A CN201910180551 A CN 201910180551A CN 110057283 A CN110057283 A CN 110057283A
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- reactance
- transformer winding
- deformation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
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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
- G01R31/72—Testing of electric windings
Abstract
The invention discloses a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance, includes the following steps: step 1, connection；Step 2, numerical value calculate；Step 3 calculates short-circuit impedance；Step 4, control group detection；Step 5, comparing；Select suitable measurement frequency, the transformer winding of test accessed into low-voltage and electric current, and by power meter, voltage meter and ammeter respectively with circuit connection, according to circuit relationships, so that wiring schematic diagram be made；Every distribution parameter such as electric current, voltage and resistance in circuit is measured, and is recorded, due to conductance G10Value be much larger than internal resistance R1With internal resistance R12Be added and value, and total reactance X10Value be much larger than reactance X1With reactance X12Be added and value, so that conductance G can be ignored in calculating10With total reactance X10；The present invention, it is easy to operate, it is compared by the data of measurement group with the data of control group, so as to diagnose by situation of the specific criterion to transformer winding, substantially increases the accuracy of checkout and diagnosis.
Description
Technical field
The present invention relates to transformer technology field, specially a kind of deformation of transformer winding based on short-circuit reactance is intelligently examined
Survey method.
Background technique
When transformer is impacted by short-circuit current in the process of running, will be flowed through in transformer winding very big
Short circuit current, short circuit current generate very big electric power under the interaction with magnetic flux leakage, and at this moment each winding will be born
Huge, non-uniform radial electric power and axial electric power；In addition, transformer may also be by during transport, installation etc.
To unexpected collision impact, jolts and vibrate.Under the action of these electric power or mechanical force, there may be mechanical positions for winding
It moves and deformation, and the serious Accident of Transformer such as may cause insulation harm, winding short circuit and burn；In addition, protection system is deposited
Long in the time that dead zone or movement failure can all cause transformer to bear short circuit current effect, this is also the original that winding deforms
One of because；If accident occurs at runtime for power transformer, may cause large-area power-cuts, turn(a)round generally want half a year with
On, it not only spends greatly, and influence is wide, therefore, designs a kind of deformation of transformer winding intelligent measurement based on short-circuit reactance
Method is necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme:
A kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance includes the following steps: step 1, connection short circuit
Test circuit；Step 2 measures single-phase distribution parameter；Step 3 calculates short-circuit impedance；Step 4, control group detection；Step
Five, contrast judgement result；
Wherein in above-mentioned step one, select suitable measurement frequency, by the transformer winding of test access low-voltage and
Electric current, and by power meter, voltage meter and ammeter respectively with circuit connection, according to circuit relationships, thus be made wiring schematic diagram；
Wherein in above-mentioned step two, every distribution parameter such as electric current, voltage and resistance in circuit is measured, and remembers
Record, due to conductance G10Value be much larger than internal resistance R1With internal resistance R12Be added and value, and total reactance X10Value be much larger than reactance X1With
Reactance X12Be added and value, so that conductance G can be ignored in calculating10With total reactance X10；
Wherein in above-mentioned step three, the short-circuit impedance Z of calculating transformer is carried out according to formula, wherein formula are as follows:
；
；
；
Wherein in above-mentioned step four, it will just commonly use transformer winding and repeat according to the actual situation Step 1: Step 2: step
Process in three obtains impedance example value Z1、Z2、Z3、Z4……Zk；
Wherein in above-mentioned step five,
1) by the impedance example value Z of phase each in above-mentioned steps fourkIt is compared with short-circuit impedance Z, and according to comparison data result
Judged；
2) check whether suspended core, observation winding, connecting line and supporting piece structure significantly displacement, deformation or spark tracking occur；
3) according to above-mentioned two conclusion collective inference, the result of detection is obtained.
According to the above technical scheme, in the step 1, measurement frequency 50Hz.
According to the above technical scheme, in the step 1, what power meter W was measured is active power, and what voltage meter V was measured is
Voltage effective value, what ammeter A was measured is current effective value.
According to the above technical scheme, in the step 1, the electric current I > 2A of access.
It according to the above technical scheme, can be according to the actual situation in the connection of transformer winding and route in the step 1
Filter and rectifier are accessed in place.
According to the above technical scheme, in the step 2, when guaranteeing progress working properly, regions shield is utilized
Principle adds screening arrangement in measurement range inner region, in safe range by electromagnetic radiation intensity control.
According to the above technical scheme, in the step 5, the transformer 10-20 test result of no deformation is differed less than
0.2%, when difference is up to 2.5%, test frequency need to be increased and do insulation checks；When differing by more than 5%, immediately out-of-service inspection around
Group.
Compared with prior art, the beneficial effects of the present invention are: it is of the invention, it is easy to operate, by the data of measurement group with
The data of control group are compared, and so as to be diagnosed by situation of the specific criterion to transformer winding, mention significantly
The high accuracy of checkout and diagnosis；The state of transformer winding is determined according to the data of detection, can effectively avoid transformer around
Group works under abnormal condition, reduces a possibility that accident occurs for transformer winding.
Detailed description of the invention
Fig. 1 is detection method flow chart of the invention；
Fig. 2 is circuit connection schematic diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2: a kind of deformation of transformer winding intelligence based on short-circuit reactance
Energy detection method, includes the following steps: step 1, connects short-circuit test route；Step 2 measures single-phase distribution parameter；Step
Three, calculate short-circuit impedance；Step 4, control group detection；Step 5, contrast judgement result；
Wherein in above-mentioned step one, select suitable measurement frequency, by the transformer winding of test access low-voltage and
Electric current, and by power meter, voltage meter and ammeter respectively with circuit connection, according to circuit relationships, thus be made wiring schematic diagram；
Wherein in above-mentioned step two, every distribution parameter such as electric current, voltage and resistance in circuit is measured, and remembers
Record, due to conductance G10Value be much larger than internal resistance R1With internal resistance R12Be added and value, and total reactance X10Value be much larger than reactance X1With
Reactance X12Be added and value, so that conductance G can be ignored in calculating10With total reactance X10；
Wherein in above-mentioned step three, the short-circuit impedance Z of calculating transformer is carried out according to formula, wherein formula are as follows:
；
；
；
Wherein in above-mentioned step four, it will just commonly use transformer winding and repeat according to the actual situation Step 1: Step 2: step
Process in three obtains impedance example value Z1、Z2、Z3、Z4……Zk；
Wherein in above-mentioned step five,
1) by the impedance example value Z of phase each in above-mentioned steps fourkIt is compared with short-circuit impedance Z, and according to comparison data result
Judged；
2) check whether suspended core, observation winding, connecting line and supporting piece structure significantly displacement, deformation or spark tracking occur；
3) according to above-mentioned two conclusion collective inference, the result of detection is obtained.
According to the above technical scheme, in step 1, measurement frequency 50Hz.
According to the above technical scheme, in step 1, what power meter W was measured is active power, and what voltage meter V was measured is voltage
Virtual value, what ammeter A was measured is current effective value.
According to the above technical scheme, in step 1, the electric current I > 2A of access.
It according to the above technical scheme, can be according to the actual situation in the junction of transformer winding and route in step 1
Filter and rectifier are accessed, interference can be reduced, electric current is more stable, improves detection effect.
According to the above technical scheme, in step 2, when guaranteeing progress working properly, the original of regions shield is utilized
Reason, adds screening arrangement in measurement range inner region, in safe range by electromagnetic radiation intensity control, avoids by live work
The interference of frequency electromagnetic field influences the accuracy of measurement.
According to the above technical scheme, in step 5, the transformer 10-20 test result of no deformation differs less than 0.2%,
When difference is up to 2.5%, test frequency need to be increased and do insulation checks；When differing by more than 5%, out-of-service inspection winding immediately.
Based on above-mentioned, it is an advantage of the current invention that it is of the invention, suitable measurement frequency is selected, measurement frequency 50Hz will
The transformer winding access low-voltage and electric current of test, the electric current I > 2A of access, and by power meter, voltage meter and ammeter
Respectively with circuit connection, what power meter W was measured is active power, and what voltage meter V was measured is voltage effective value, and ammeter A is measured
Be current effective value, according to circuit relationships, thus be made wiring schematic diagram；Due to G10Value be much larger than R1With R12The sum being added
Value, and X10Value be much larger than X1With X12Be added and value, so that G can be ignored in calculating10With X10；Calculating change is carried out according to formula
The short-circuit impedance Z, R and X of depressor are respectively internal resistance and reactance, and wherein formula is；；；It will
Just common transformer winding repeats according to the actual situation Step 1: Step 2: process in step 3, obtains Z1、Z2、Z3、
Z4……Zk, wherein the transformer 10-20 test result of no deformation differs less than 0.2%, when difference is up to 2.5%, needs to increase
Test frequency simultaneously does insulation inspection；When differing by more than 5%, out-of-service inspection winding immediately；According to comparison as a result, inspection can be obtained
The result of survey；The present invention, it is easy to operate, it is compared by the data of measurement group with the data of control group, so as to pass through
Specific criterion diagnoses the situation of transformer winding, substantially increases the accuracy of checkout and diagnosis.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance includes the following steps: step 1, connect short
Road test circuit；Step 2 measures single-phase distribution parameter；Step 3 calculates short-circuit impedance；Step 4, control group detection；Step
Five, contrast judgement result；It is characterized by:
Wherein in above-mentioned step one, select suitable measurement frequency, by the transformer winding of test access low-voltage and
Electric current, and by power meter, voltage meter and ammeter respectively with circuit connection, according to circuit relationships, thus be made wiring schematic diagram；
Wherein in above-mentioned step two, every distribution parameter such as electric current, voltage and resistance in circuit is measured, and remembers
Record, due to conductance G10Value be much larger than internal resistance R1With internal resistance R12Be added and value, and total reactance X10Value be much larger than reactance X1With
Reactance X12Be added and value, so that conductance G can be ignored in calculating10With total reactance X10；
Wherein in above-mentioned step three, the short-circuit impedance Z of calculating transformer is carried out according to formula, wherein formula are as follows:
；
；
；
Wherein in above-mentioned step four, it will just commonly use transformer winding and repeat according to the actual situation Step 1: Step 2: step
Process in three obtains impedance example value Z1、Z2、Z3、Z4……Zk；
Wherein in above-mentioned step five,
1) by the impedance example value Z of phase each in above-mentioned steps fourkBe compared with short-circuit impedance Z, and according to comparison data result into
Row judgement；
2) check whether suspended core, observation winding, connecting line and supporting piece structure significantly displacement, deformation or spark tracking occur；
3) according to above-mentioned two conclusion collective inference, the result of detection is obtained.
2. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
It is: in the step 1, measurement frequency 50Hz.
3. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
Be: in the step 1, what power meter W was measured is active power, and what voltage meter V was measured is voltage effective value, and ammeter A is surveyed
What is obtained is current effective value.
4. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
It is: in the step 1, the electric current I > 2A of access.
5. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
It is: in the step 1, filter and rectification can be accessed in the junction of transformer winding and route according to the actual situation
Device.
6. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
It is: in the step 2, when guaranteeing progress working properly, using the principle of regions shield, in measurement range inner region
Screening arrangement is inside added, in safe range by electromagnetic radiation intensity control.
7. a kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance according to claim 1, feature
Be: in the step 5, the transformer 10-20 test result of no deformation differs less than 0.2%, when difference is up to 2.5%, needs
Increase test frequency and do insulation and checks；When differing by more than 5%, out-of-service inspection winding immediately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910180551.3A CN110057283A (en) | 2019-03-11 | 2019-03-11 | A kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance |
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| CN201910180551.3A CN110057283A (en) | 2019-03-11 | 2019-03-11 | A kind of deformation of transformer winding intelligent detecting method based on short-circuit reactance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645887A (en) * | 2019-10-18 | 2020-01-03 | 国网辽宁省电力有限公司抚顺供电公司 | Winding deformation judgment method based on short-circuit reactance |
| CN110645888A (en) * | 2019-10-18 | 2020-01-03 | 国网辽宁省电力有限公司抚顺供电公司 | Winding deformation judgment method based on frequency response analysis FRA |
| CN111596131A (en) * | 2020-04-29 | 2020-08-28 | 云南电网有限责任公司昭通供电局 | Method and system for calculating reactance value of double winding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645887A (en) * | 2019-10-18 | 2020-01-03 | 国网辽宁省电力有限公司抚顺供电公司 | Winding deformation judgment method based on short-circuit reactance |
| CN110645888A (en) * | 2019-10-18 | 2020-01-03 | 国网辽宁省电力有限公司抚顺供电公司 | Winding deformation judgment method based on frequency response analysis FRA |
| CN111596131A (en) * | 2020-04-29 | 2020-08-28 | 云南电网有限责任公司昭通供电局 | Method and system for calculating reactance value of double winding |
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Application publication date: 20190726 |
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