CN106019074B - The impulses injection moment control method and device of on-line checking deformation of transformer winding - Google Patents
The impulses injection moment control method and device of on-line checking deformation of transformer winding Download PDFInfo
- Publication number
- CN106019074B CN106019074B CN201610602793.3A CN201610602793A CN106019074B CN 106019074 B CN106019074 B CN 106019074B CN 201610602793 A CN201610602793 A CN 201610602793A CN 106019074 B CN106019074 B CN 106019074B
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- CN
- China
- Prior art keywords
- network voltage
- line checking
- transformer winding
- peak value
- capacitive couplings
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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 Relating To Insulation (AREA)
Abstract
The invention discloses a kind of impulses injection moment control methods of on-line checking deformation of transformer winding to inject driving pulse into capacitive couplings ring when network voltage handles peak value.The present invention is by the injected pulse into capacitive couplings ring when network voltage is handled at peak value, to solve the problems, such as that iron core non-linear effects testing result causes erroneous judgement.The invention also discloses a kind of impulses injection moment control devices of on-line checking deformation of transformer winding simultaneously, including control module and clock, the control module generates trigger pulse triggers clock when network voltage handles peak value, and the clock injects driving pulse into capacitive couplings ring.
Description
Technical field
The invention belongs to winding deformation of power transformer field of fault detection, main contents are related to online injection pulse detection
The method 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 scholar to propose to realize online by design installation capacitive couplings ring come injected pulse
Frequency response analysis detects the state of winding.
However, find after study, when being operated normally due to transformer, in a power frequency period, iron core it is non-linear
Cause its instantaneous magnetic conductivity at power-frequency voltage maximum value and zero crossing different, the different impulses injection moment cause to obtain
Frequency response curve it is also different.Therefore, it is necessary to avoid it from impacting test result at the time of controlling impulses injection.
Summary of the invention
In consideration of it, the object of the present invention is to provide a kind of controls of the impulses injection moment of on-line checking deformation of transformer winding
Method and device.
An object of the present invention is achieved through the following technical solutions, the arteries and veins of on-line checking deformation of transformer winding
Punching injection moment control method injects driving pulse into capacitive couplings ring when network voltage handles peak value.
The second object of the present invention is to what is be achieved through the following technical solutions, the arteries and veins of on-line checking deformation of transformer winding
Punching injection moment control device, including control module and clock, the control module are generated when network voltage handles peak value
Trigger pulse triggers clock, the clock inject driving pulse into capacitive couplings ring.
It further, further include capture card, the power-frequency voltage of the capture card acquisition capacitive couplings ring, the capture card will
Collected data are input to control module.
By adopting the above-described technical solution, the present invention has the advantage that:
The present invention is by the injected pulse into capacitive couplings ring when network voltage is handled at peak value, to solve iron core
Non-linear effects testing result causes the problem of erroneous judgement.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is the structure chart of apparatus of the present invention.
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 iron core of transformer have it is non-linear, core interior magnetic flux it is approximate with network voltage meet lead
Number relationship, as shown in formula (1).
Network voltage is similar to a sinusoidal signal, and when its zero crossing, core interior magnetic flux is in maximum value, at this moment iron
Core approaches to saturation, it is believed that its work is in inelastic region；When network voltage is at peak value, core interior magnetic flux was in
Zero point, it is believed that its work is in linear zone.Therefore, the present invention provides a kind of pulse note of on-line checking deformation of transformer winding
Enter moment control method, this method is specially to consider using network voltage as Reference Design trigger signal, so that network voltage exists
When at peak value, trigger pulse source generates impulses injection into capacitive couplings ring.
The present invention is by the injected pulse into capacitive couplings ring when network voltage is handled at peak value, to solve iron core
Non-linear effects testing result causes the problem of erroneous judgement.
The present invention also provides a kind of impulses injection moment control devices of on-line checking deformation of transformer winding, including control
Module and clock, the control module generate trigger pulse triggers clock, the pulse when network voltage handles peak value
Driving pulse is injected into capacitive couplings ring in source.
Since capacitive couplings ring can not only be used to injected pulse signal, it can simultaneously serve as a capacitance-voltage-distributing type and pass
Sensor measures power-frequency voltage, therefore, it is possible to use the program-controlled chip of FPGA acquires power-frequency voltage, and is handled, therefore, online to examine
The impulses injection moment control device for surveying deformation of transformer winding further includes capture card, and the capture card acquires capacitive couplings ring
Power-frequency voltage, collected data are input to control module by the capture card.
The present invention generates the sending pulse of trigger signal trigger pulse source using control module simultaneously and carries out coupling injection.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art
Various changes and modifications can be made to the invention by member without departing from the spirit and scope of the present invention.If in this way, of the invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass this to these modifications and variations
Including a little modification and variations.
Claims (3)
1. the impulses injection moment control method of on-line checking deformation of transformer winding, it is characterised in that: this method utilizes Lee's Sa
Such as graphic-arts technique, 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, and elliptical major and minor axis will be with square of current amplitude
And proportional increase or diminution, the iron core of transformer have non-linear, core interior magnetic flux is approximate with network voltage to be met and leads
Number relationship:
Network voltage is similar to a sinusoidal signal, and when its zero crossing, core interior magnetic flux is in maximum value, and at this moment iron core becomes
Nearly saturation, it is believed that its work is in inelastic region；
When network voltage is at peak value, core interior magnetic flux is in zero crossing, it is believed that its work is in linear zone；
This method is using network voltage as Reference Design trigger signal, when network voltage handles peak value, to capacitive couplings ring
Middle injection driving pulse.
2. being controlled using the impulses injection moment that control method described in claim 1 carries out on-line checking deformation of transformer winding
Device, it is characterised in that: including control module and clock, the control module generates triggering when network voltage handles peak value
Pulse-triggered clock, the clock inject driving pulse into capacitive couplings ring.
3. the impulses injection moment control device of on-line checking deformation of transformer winding according to claim 2, feature
It is: further includes capture card, the power-frequency voltage of capture card acquisition capacitive couplings ring, the capture card is by collected number
According to being input to control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602793.3A CN106019074B (en) | 2016-07-27 | 2016-07-27 | The impulses injection moment control method and device of on-line checking deformation of transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602793.3A CN106019074B (en) | 2016-07-27 | 2016-07-27 | The impulses injection moment control method and device of on-line checking deformation of transformer winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106019074A CN106019074A (en) | 2016-10-12 |
| CN106019074B true CN106019074B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610602793.3A Expired - Fee Related CN106019074B (en) | 2016-07-27 | 2016-07-27 | The impulses injection moment control method and device of on-line checking deformation of transformer winding |
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| Country | Link |
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| CN (1) | CN106019074B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872856B (en) | 2018-07-16 | 2019-04-09 | 山东固特电气有限公司 | Generator amature winding state detection device and method |
| CN110243275A (en) * | 2019-05-23 | 2019-09-17 | 国网山东省电力公司临沂供电公司 | A kind of device for distribution transformer winding online injection swept-frequency signal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB939870A (en) * | 1961-07-31 | 1963-10-16 | Wayne Kerr Lab Ltd | Improvements in or relating to vibration analysing apparatus |
| CN101701995A (en) * | 2009-11-12 | 2010-05-05 | 重庆大学 | Impulse response analytical test apparatus and method for detecting deformation of transformer winding |
| CN103712551A (en) * | 2013-12-04 | 2014-04-09 | 国家电网公司 | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method |
| CN104061850A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Device for detecting deformation of transformer winding based on pulse on-line injection |
| CN104154854A (en) * | 2014-07-29 | 2014-11-19 | 重庆大学 | On-line power transformer winding deformation monitoring method based on Lissajous characteristics |
| CN105371742A (en) * | 2014-08-29 | 2016-03-02 | 王彦波 | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5961238A (en) * | 1982-09-29 | 1984-04-07 | Toshiba Corp | Analyzing device of multi-path |
| US9370308B2 (en) * | 2012-05-01 | 2016-06-21 | Nellcor Puritan Bennett Ireland | Angle distribution technique for analyzing a physiological sensor signal |
-
2016
- 2016-07-27 CN CN201610602793.3A patent/CN106019074B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB939870A (en) * | 1961-07-31 | 1963-10-16 | Wayne Kerr Lab Ltd | Improvements in or relating to vibration analysing apparatus |
| CN101701995A (en) * | 2009-11-12 | 2010-05-05 | 重庆大学 | Impulse response analytical test apparatus and method for detecting deformation of transformer winding |
| CN103712551A (en) * | 2013-12-04 | 2014-04-09 | 国家电网公司 | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method |
| CN104061850A (en) * | 2014-07-03 | 2014-09-24 | 国家电网公司 | Device for detecting deformation of transformer winding based on pulse on-line injection |
| CN104154854A (en) * | 2014-07-29 | 2014-11-19 | 重庆大学 | On-line power transformer winding deformation monitoring method based on Lissajous characteristics |
| CN105371742A (en) * | 2014-08-29 | 2016-03-02 | 王彦波 | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method |
Non-Patent Citations (1)
| Title |
|---|
| 基于电压/电流李萨如特性的变压器绕组变形检测方法;李亚宁等;<<云南电力技术>>;20160630;第44卷(第3期);25-29 |
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| CN106019074A (en) | 2016-10-12 |
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Granted publication date: 20190308 Termination date: 20190727 |