CN104977489A - Detection and maintenance method for windings of transformer - Google Patents
Detection and maintenance method for windings of transformer Download PDFInfo
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- CN104977489A CN104977489A CN201510397427.4A CN201510397427A CN104977489A CN 104977489 A CN104977489 A CN 104977489A CN 201510397427 A CN201510397427 A CN 201510397427A CN 104977489 A CN104977489 A CN 104977489A
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Abstract
The invention discloses a detection and maintenance method for the windings of a transformer, which comprises the steps of (1) detecting and maintaining the direct-current resistance of windings: detecting the resistance of the winding of each phase, figuring out the resistance value of the winding of each phase, calculating the average value of the resistance values of the windings of three phases, adjusting the resistance value of the winding of each phase to be within +/-104% of the above average value, detecting the line-to-line differences of the windings and adjusting the line-to-line resistance value of the winding of each phase to be within +/-102% of the above average value; (2) detecting and maintaining the insulation resistance of windings: detecting the insulation resistance of the coiling respectively at various temperatures for multiple times, and enabling the difference between multiple detecting results to be within 1%; (3) detecting and maintaining the winding absorption ratio: detecting the winding absorption ratio at a temperature of 15-40 DEG C, and enabling the winding absorption ratio to be not smaller than 1.3; (4) detecting and maintaining the winding polarization index: detecting the winding polarization index at a temperature of 15-30 DEG C, and enabling the winding polarization index to be not smaller than 1.5. According to the technical scheme of the invention, the daily maintenance of windings can be quickly conducted, and the working performances of windings can be monitored.
Description
Technical field
The present invention relates to a kind of detection maintaining method of winding, especially the winding of transformer detects maintaining method.
Background technology
Transformer (Transformer) utilizes the principle of electromagnetic induction to change the device of alternating voltage, and main member is primary coil, secondary coil and iron core (magnetic core).Major function has: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformer) etc.Can be divided into by purposes: power transformer and special transformer (electric furnace change, rectification change, power frequency testing transformer, pressure regulator, mining change, audio-frequency transformer (AFT), I.F.T., high-frequency transformer, impact transformer, instrument transformer, electronic transformer, reactor, mutual inductor etc.).Circuit symbol commonly uses the beginning that T is used as numbering. example: T01, T201 etc.
The application of transformer is very extensive, and therefore for transformer, particularly its detection maintenance of winding of transformer is the main points in transformer serviceable life.
Summary of the invention
The winding that the technical problem to be solved in the present invention is to provide a kind of transformer detects maintaining method, can carry out daily winding fast and safeguard, monitor its serviceability.
The present invention is achieved through the following technical solutions.
The winding of transformer detects a maintaining method, comprising:
(1) winding D.C. resistance is safeguarded in detection: the resistance detecting each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 2% of three-phase windings;
(2) winding insulation resistance is safeguarded in detection: distinguish at different temperatures and repeated detection coiling insulation resistance, make the difference between its repeated detection be not more than 1%;
(3) coiling absorptance is safeguarded in detection: under the state of temperature of 15 DEG C-40 DEG C, detect coiling absorptance, make it be not less than 1.3;
(4) coiling polarization index is safeguarded in detection: under the state of temperature of 15 DEG C-30 DEG C, detect coiling polarization index, make it be not less than 1.5.
Further, (1): at more than 1.8MVA, 1.8MVA is comprised for transformer, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, its difference is made to be not more than the mean value 2% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1% of three-phase windings.
Further, (1) for transformer at below 1.8MVA, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, its difference is made to be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1.5% of three-phase windings.
Further, before (2) are detected, coiling is fully discharged in advance.
Further, (2) are detected and are safeguarded that temperature controls below 50 DEG C.
Beneficial effect of the present invention:
The detection of Transformer Winding under daily state can be tackled safeguard, monitor its serviceability, guarantee that its serviceable life is in general category; And this method is comparatively easy, can be familiar with grasping by those of ordinary skill, effect is better.
Embodiment
According to embodiment, the present invention is described in further detail below.
The present invention, the winding of transformer detects maintaining method, comprising:
(1) winding D.C. resistance is safeguarded in detection: the resistance detecting each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 2% of three-phase windings;
Especially, at more than 1.8MVA, 1.8MVA is comprised for transformer, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, its difference is made to be not more than the mean value 2% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1% of three-phase windings;
For transformer at below 1.8MVA, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1.5% of three-phase windings
(2) winding insulation resistance is safeguarded in detection: distinguish at different temperatures and repeated detection coiling insulation resistance, make the difference between its repeated detection be not more than 1%;
Before detection, coiling is fully discharged in advance, detects and safeguards that temperature controls below 50 DEG C;
(3) coiling absorptance is safeguarded in detection: under the state of temperature of 15 DEG C-40 DEG C, detect coiling absorptance, make it be not less than 1.3;
(4) coiling polarization index is safeguarded in detection: under the state of temperature of 15 DEG C-30 DEG C, detect coiling polarization index, make it be not less than 1.5.
The present invention, the winding of transformer detects maintaining method, can tackle the detection of Transformer Winding under daily state and safeguard, monitor its serviceability, guarantee that its serviceable life is in general category; And this method is comparatively easy, can be familiar with grasping by those of ordinary skill, effect is better.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (5)
1. the winding of transformer detects a maintaining method, it is characterized in that, comprising:
(1) winding D.C. resistance is safeguarded in detection: the resistance detecting each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 2% of three-phase windings;
(2) winding insulation resistance is safeguarded in detection: distinguish at different temperatures and repeated detection coiling insulation resistance, make the difference between its repeated detection be not more than 1%;
(3) coiling absorptance is safeguarded in detection: under the state of temperature of 15 DEG C-40 DEG C, detect coiling absorptance, make it be not less than 1.3;
(4) coiling polarization index is safeguarded in detection: under the state of temperature of 15 DEG C-30 DEG C, detect coiling polarization index, make it be not less than 1.5.
2. the winding of transformer according to claim 1 detects maintaining method, it is characterized in that, (1): at more than 1.8MVA, 1.8MVA is comprised for transformer, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 2% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1% of three-phase windings.
3. the winding of transformer according to claim 1 detects maintaining method, it is characterized in that, (1) for transformer at below 1.8MVA, detect the resistance of each phase winding, calculate the resistance of each phase winding and the mean value of three-phase windings, make its difference be not more than the mean value 4% of three-phase windings, difference between the line of detection winding, makes its difference be not more than the mean value 1.5% of three-phase windings.
4. the winding of transformer according to claim 1 detects maintaining method, it is characterized in that, before (2) are detected, coiling is fully discharged in advance.
5. the winding of transformer according to claim 1 detects maintaining method, it is characterized in that, (2) are detected and safeguarded that temperature controls below 50 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510397427.4A CN104977489A (en) | 2015-07-05 | 2015-07-05 | Detection and maintenance method for windings of transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510397427.4A CN104977489A (en) | 2015-07-05 | 2015-07-05 | Detection and maintenance method for windings of transformer |
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| CN104977489A true CN104977489A (en) | 2015-10-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006325A (en) * | 2019-03-11 | 2019-07-12 | 国网江苏省电力有限公司淮安供电分公司 | A kind of deformation of transformer winding intelligent detecting method based on frequency sweep impedance |
| CN111238359A (en) * | 2018-11-28 | 2020-06-05 | 国网四川省电力公司眉山供电公司 | Intelligent detection method for transformer winding deformation based on frequency sweep impedance |
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| JP2010032490A (en) * | 2008-06-30 | 2010-02-12 | Hioki Ee Corp | Resistance measuring apparatus |
| CN202548214U (en) * | 2012-03-31 | 2012-11-21 | 上海市电力公司 | Electronic insulation resistance detection device |
| CN102879697A (en) * | 2012-10-30 | 2013-01-16 | 中国二十二冶集团有限公司 | Optimized power transformer testing method |
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| CN103605881A (en) * | 2013-10-25 | 2014-02-26 | 南昌大学 | Fault tree and analytic hierarchy process based evaluation method of state of power transformer |
| CN104036131A (en) * | 2014-06-06 | 2014-09-10 | 清华大学 | Transformer aging fault rate estimation method |
| CN104062526A (en) * | 2014-06-30 | 2014-09-24 | 国家电网公司 | Oil-oil bushing cable outlet transformer test method without head removing |
| CN104535865A (en) * | 2014-12-30 | 2015-04-22 | 西安工程大学 | Comprehensive diagnosing method for operation troubles of power transformer based on multiple parameters |
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2015
- 2015-07-05 CN CN201510397427.4A patent/CN104977489A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010032490A (en) * | 2008-06-30 | 2010-02-12 | Hioki Ee Corp | Resistance measuring apparatus |
| CN202548214U (en) * | 2012-03-31 | 2012-11-21 | 上海市电力公司 | Electronic insulation resistance detection device |
| CN102879697A (en) * | 2012-10-30 | 2013-01-16 | 中国二十二冶集团有限公司 | Optimized power transformer testing method |
| CN103336186A (en) * | 2012-12-18 | 2013-10-02 | 辽宁省电力有限公司检修分公司 | Method for testing transformer equipment without disassembling lead |
| CN103605881A (en) * | 2013-10-25 | 2014-02-26 | 南昌大学 | Fault tree and analytic hierarchy process based evaluation method of state of power transformer |
| CN104036131A (en) * | 2014-06-06 | 2014-09-10 | 清华大学 | Transformer aging fault rate estimation method |
| CN104062526A (en) * | 2014-06-30 | 2014-09-24 | 国家电网公司 | Oil-oil bushing cable outlet transformer test method without head removing |
| CN104535865A (en) * | 2014-12-30 | 2015-04-22 | 西安工程大学 | Comprehensive diagnosing method for operation troubles of power transformer based on multiple parameters |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238359A (en) * | 2018-11-28 | 2020-06-05 | 国网四川省电力公司眉山供电公司 | Intelligent detection method for transformer winding deformation based on frequency sweep impedance |
| CN110006325A (en) * | 2019-03-11 | 2019-07-12 | 国网江苏省电力有限公司淮安供电分公司 | A kind of deformation of transformer winding intelligent detecting method based on frequency sweep impedance |
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