CN106124924B - The load method for normalizing of lissajous figures on-line checking deformation of transformer winding - Google Patents
The load method for normalizing of lissajous figures on-line checking deformation of transformer winding Download PDFInfo
- Publication number
- CN106124924B CN106124924B CN201610601726.XA CN201610601726A CN106124924B CN 106124924 B CN106124924 B CN 106124924B CN 201610601726 A CN201610601726 A CN 201610601726A CN 106124924 B CN106124924 B CN 106124924B
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- China
- Prior art keywords
- load
- lissajous figures
- transformer
- data
- normalizing
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses the load method for normalizing of lissajous figures on-line checking deformation of transformer winding, comprising the following steps: S1. measures gauge load data；S2. the voltage and current signal under different load state is measured, and will be in the case of its reduction to gauge load；S3. the number building lissajous figures measured according to step S1 and step S2 is as the data after load normalization.The present invention is by unifying lissajous figures under reduction to same load condition, to solve the problems, such as that load fluctuation influence causes erroneous judgement.
Description
Technical field
The invention belongs to winding deformation of power transformer field of fault detection, main to be specifically related to lissajous figures on-line checking
The load method for normalizing of deformation of transformer winding.
Background technique
Power transformer is one of most important equipment in electric system, is also become for the Condition-Based Maintenance Technology of transformer
The hot spot of domestic and foreign scholars' research.There is foreign scholar to propose port voltage current signal construction when operating normally based on transformer
Lissajous figures can reflect the deformation of winding by the variation of figure.This method utilizes existing at transformer outlet
Data acquisition can be completed in PT, CT, no longer needs to install additional sensor, while graphic change is clear and intuitive, is easy to winding
State is differentiated.
However, this method haves the defects that the variation of transformer load can affect greatly lissajous figures.It examines
Consider the transformer load in actual motion and be always at fluctuation status, lissajous figures method is difficult to realize engineer application.
Summary of the invention
In consideration of it, the object of the present invention is to provide a kind of loads of lissajous figures on-line checking deformation of transformer winding to return
One changes method.
The purpose of the present invention is what is be achieved through the following technical solutions, lissajous figures on-line checking deformation of transformer winding
Load method for normalizing, comprising the following steps:
S1. gauge load data are measured, one secondary side current of transformer is respectively I1f、I2f, between high-pressure side and low-pressure side
Voltage difference be Δ U；
S2. the voltage and current signal under different load state is measured, and will be in the case of its reduction to gauge load；Work as transformation
Device long-play after T, measures data in two kinds of different load situations a, b respectively for a period of time, the secondary side electricity measured
Flow valuve is respectively I1a、I2a、I1b、I2b；Difference between high-pressure side and low-pressure side is respectively Δ Ua、ΔUb；
S3. Δ U is usedTWith I1fLissajous figures is constructed as the data after load normalization.
By adopting the above-described technical solution, the present invention has the advantage that:
Method of the present invention unifies lissajous figures under reduction to same load condition, to solve load fluctuation
Influence causes the problem of erroneous judgement.
Specific embodiment
Below by a preferred embodiment of the present invention will be described in detail；Preferred embodiment be should be appreciated that only for saying
The bright present invention, rather than limiting the scope of protection of the present invention.
Lissajous figures method judges that winding deformation is using graphic change as foundation, if transformer load changes
When, the lissajous figures of building will receive influence also to change.Elliptical major and minor axis will be with square of current amplitude
And proportional increase or diminution.The electric current of one secondary side of transformer might as well be regarded as driving source, the voltage difference on the port of two sides
Regard response as, when load variations, driving source variation, while variation is responded, so that lissajous figures can also change.If can utilize
Response under arbitrary excitation acquires the response under a pattern field, constructs Lie groupoid with pattern field source using this response
The characteristic parameter of shape, the ellipse figure will be no longer by loading effects.
Based on this, the present invention provides a kind of load normalization side of lissajous figures on-line checking deformation of transformer winding
Method, specifically includes the following steps:
1. measuring gauge load data: when winding determines health, load condition at this time might as well be set as gauge load.
One secondary side current of transformer is respectively I at this time1f、I2f, voltage difference between high-pressure side and low-pressure side is Δ U, using Δ U with
Lissajous figures is constructed as gauge load data.
2. measuring the voltage and current signal under different load state, and will be in the case of its reduction to gauge load: working as transformation
Device long-play after T, measures data in two kinds of different load situations a, b respectively for a period of time, the secondary side electricity measured
Flow valuve is respectively I1a、I2a、I1b、I2b；Difference between high-pressure side and low-pressure side is respectively Δ Ua、ΔUb。
3. using Δ UTWith I1fLissajous figures is constructed as the data after load normalization.
The present invention is made by unifying lissajous figures under reduction to same load condition to solve load fluctuation influence
The problem of at erroneous judgement.
Claims (1)
1. the load method for normalizing of lissajous figures on-line checking deformation of transformer winding, it is characterised in that: including following step
It is rapid:
S1. gauge load data are measured, one secondary side current of transformer is respectively I1f、I2f, electricity between high-pressure side and low-pressure side
Pressure difference is Δ U；
S2. the voltage and current signal under different load state is measured, and will be in the case of its reduction to gauge load；When transformer is long
After time runs a period of time T, data are measured in two kinds of different load situations a, b respectively, the secondary side current value measured
Respectively I1a、I2a、I1b、I2b；Difference between high-pressure side and low-pressure side is respectively Δ Ua、ΔUb；
S3. Δ U is usedTWith I1fLissajous figures is constructed as the data after load normalization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601726.XA CN106124924B (en) | 2016-07-27 | 2016-07-27 | The load method for normalizing of lissajous figures on-line checking deformation of transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601726.XA CN106124924B (en) | 2016-07-27 | 2016-07-27 | The load method for normalizing of lissajous figures on-line checking deformation of transformer winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106124924A CN106124924A (en) | 2016-11-16 |
| CN106124924B true CN106124924B (en) | 2019-03-08 |
Family
ID=57290803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610601726.XA Expired - Fee Related CN106124924B (en) | 2016-07-27 | 2016-07-27 | The load method for normalizing of lissajous figures on-line checking deformation of transformer winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106124924B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398649B (en) * | 2019-07-16 | 2021-03-30 | 三峡大学 | Method for online detecting transformer winding deformation based on voltage difference/current trace diagram |
| CN113791369B (en) * | 2021-09-27 | 2023-01-03 | 重庆大学 | Lissajous figure transformer winding deformation online monitoring method based on third harmonic |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710437A (en) * | 2005-04-30 | 2005-12-21 | 国电南京自动化股份有限公司 | Method for judging internal fault of transformer using excitation property |
| CN104154854B (en) * | 2014-07-29 | 2017-03-01 | 重庆大学 | Method based on Lee's Sa such as characteristic on-line monitoring winding deformation of power transformer |
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2016
- 2016-07-27 CN CN201610601726.XA patent/CN106124924B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN106124924A (en) | 2016-11-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |