CN101303394A - Device and method for testing hydroelectric generating set electricity generator stator core - Google Patents
Device and method for testing hydroelectric generating set electricity generator stator core Download PDFInfo
- Publication number
- CN101303394A CN101303394A CNA2008100537887A CN200810053788A CN101303394A CN 101303394 A CN101303394 A CN 101303394A CN A2008100537887 A CNA2008100537887 A CN A2008100537887A CN 200810053788 A CN200810053788 A CN 200810053788A CN 101303394 A CN101303394 A CN 101303394A
- Authority
- CN
- China
- Prior art keywords
- stator core
- coil
- generating set
- hydroelectric generating
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a test device for stator core of a hydroelectric generating set and a method thereof, which is characterized in that the test device comprises an independent power supply with the current of 400A to 800A and the voltage of 380V, a field coil winding on a stator core, a secondary measuring coil winding on the stator core, a voltmeter connected in parallel with the secondary measuring coil, a wattmeter connected in serial with the secondary measuring coil, a current transformer connected in serial with the wattmeter and an ammeter; the two ends of the field coil winding on a stator core are connected with the independent power supply, and another voltmeter is connected with the field coil in parallel. The test device of the invention adopts the AC power source with the voltage of 380V and the frequency of 50Hz to carry out loss test for the hydroelectric generating set when the generator stator core is in excitation, which provides an economic and practical method for the generators of the hydroelectric generating set with large capacity to carry out core test in a power station, not only solves the problem of difficulty in transporting a large-capacity voltage regulator but also saves the cost for purchasing the large-capacity voltage regulator.
Description
Technical field
The invention belongs to a kind of hydraulic generator unit experimental provision, particularly relate to a kind of hydroelectric generating set electricity generator stator core test unit and method.
Background technology
The power attenuation test of hydroelectric generating set electricity generator stator core is an indispensable inspection measure in the stator assembling process.This test of stator core at present is to utilize the special field coil that twines, pass to industrial-frequency alternating current, make it to form the magnetic flux of alternation (near state of saturation in core interior, 10,000 Gausses), make the part of insulation ag(e)ing in the iron core produce bigger eddy current, the very fast rising of temperature, measure each temperature rise with thermometer then, loss when utilizing power meter to measure excitation simultaneously, according to measurement result, calculate the power of iron core unit weight institute loss, itself and standard are compared, judge that stator core has non-fault to exist.For the ease of result's comparison, be with 10,000 Gausses' magnetic flux density and the alternating current of 50HZ.In hydraulic generator unit manufacturing plant, voltage, the electric current that should add in the time of can going out 10,000 Gausses by the various calculation of parameter of iron core, use pressure regulator given then, and the such stator capacity that assembles at the scene, power station is all bigger, this just causes difficulty to stator-core test, because, first, general pressure regulator can not satisfy the needs of voltage, electric current, if will purchase pressure regulator capacious, then need substantial contribution.The second, the capacity of pressure regulator is big more, and its overall volume is just big more, causes difficulty to transportation, and transportation is jolted and also can be caused the damage of pressure regulator part for a long time, shortens its serviceable life.
Summary of the invention
The present invention provides a kind of hydroelectric generating set electricity generator stator core test unit that utilizes the existing condition in power station to carry out hydraulic generator unit stator core specific loss test for solving the technical matters that exists in the known technology.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is: it includes 380 volts of 400-800 and pacifies independent three-phase supply, be wrapped in the field coil on the stator core, the secondary that is wrapped on the stator core is measured coil, voltage table with secondary measurement coils from parallel connection of coils, measure the power meter of coil polyphone and the current transformer and the reometer of contacting with secondary with power meter, the described two ends that are wrapped in the field coil on the stator core directly with described independent three-phase supply in two-phase join, another voltage table and described field coil are in parallel.
The present invention can also adopt following technical scheme:
The described two ends that are wrapped in the field coil on the stator core directly with described independent three-phase supply in A, C two-phase be connected in series mutually.
The present invention provides a kind of hydroelectric generating set electricity generator stator core test method of utilizing existing condition in power station and said apparatus to carry out hydroelectric generating set electricity generator stator core specific loss test for solving the technical matters that exists in the known technology.
The technical scheme that the present invention takes for the technical matters that exists in the solution known technology is: it includes following steps:
When the given output power of described independent three-phase supply, measure the actual voltage value that described secondary is measured the coil two ends;
Under the various parameter conditions of stator core, calculate the calculating voltage value at described secondary measurement coil two ends when stator core passes through 10,000 Gausses;
The loss power of stator core during square the obtaining magnetic flux density and be 10,000 Gausses of ratio of measuring the calculating voltage value at coil two ends and actual voltage value according to described secondary with the product of the power of the actual output of secondary measurement coil; And then described loss power and the ratio of stator core calculated weight are the specific loss of stator core.
Advantage and good effect that the present invention has are: owing to adopted direct 380V with power plant, loss test when the AC power of 50Hz is carried out the hydroelectric generating set electricity generator stator core excitation, the apparatus and method of the loss power of stator core when secondary is measured the calculating voltage value at coil two ends and detected square the obtaining magnetic flux density and be 10,000 Gausses with the product of the power of the actual output of secondary measurement coil of actual voltage value ratio between two that secondary measures the coil two ends when being 10,000 Gausses by calculating the stator core excitation, do the iron core test in the power station unit capacious a kind of economy is provided, practical method has promptly solved the difficult problem of high capacity pressure regulator transportation, saved the fund of buying the high capacity pressure regulator again.
Description of drawings
Fig. 1 is a formation synoptic diagram of the present invention.
Embodiment
For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
As shown in Figure 1,50HZ, a 380V who is provided by the power station and 400,600 or the independent current source of 800A directly receives A, the C two-phase of 380V power supply and forms energized circuit being wrapped in field coil 1 on the generator unit stator 3 specially; The secondary that twines on generator unit stator 3 is measured the voltage terminal of two termination power meter W of coil 2; The current terminal of the two termination power meter W of current transformer CT.Voltage table V is in parallel with the two ends that secondary is measured coil 2, and voltage table V1 is in parallel with the two ends of field coil 1.
Utilize the test method of the hydroelectric generating set electricity generator stator core specific loss that device shown in Figure 1 carries out as follows:
As 50HZ, 380V and 400,600 or during the given output power of independent three-phase supply of 800A, measure the actual voltage value U that described secondary is measured coil 2 two ends
2 reality
Under the various parameter conditions of stator core, calculate the calculating voltage value U at described secondary measurement coil two ends when stator core passes through 10,000 Gausses
2 calculate
Measure the calculating voltage value U at coil two ends according to described secondary
2 calculateWith actual voltage value U
2 realityRatio square measure the power P of the actual output of coil with secondary
RealThe loss power P of product stator core when obtaining magnetic flux density and being 10,000 Gausses; And then loss power P and stator core calculated weight G
JRatio be the specific loss Δ P of stator core.That is:
P=P
Real* (U
2 calculate÷ U
2 reality)
2
U wherein
2 calculate-go out by the various calculation of parameter of stator core 10,000 Gausses the time the numerical value of secondary voltage (secondary is measured coil 2 voltages);
U
2 reality-the actual numerical value of secondary voltage in the voltage table when being not equal to 10,000 Gausses by magnetic flux density both was given as 50HZ, 380V and 400,600 or the actual numerical value of secondary voltage in voltage table V during 800A when independent three-phase supply;
Power when the P-magnetic flux density is 10,000 Gausses;
Then the specific loss of iron core is P/G
j=Δ P (w/kg)
G wherein
J-be the stator core calculated weight;
Δ P-is the specific loss of iron core.
Result of calculation and stator-core test standard compared to judge that stator core has non-fault to exist.For example: the computing method of 22000KW stator-core test are:
The iron core outer diameter D I=645cm punching groove depth hs=12.66cm siliconized plate trade mark: 50W290
Iron core inside diameter D i=600cm stacking factor Kfe 〉=0.96
Iron core length overall Lt=120cm
1. iron core effective length: Lfe=Kfe.Lt=0.96 * 120=115.2cm
2. iron core yoke height: hj=(DI-Di)/2-hs=645-600/2-12.66=9.84cm
3. the sectional area Aj=Lfe of iron core yoke portion.hj＝115.2×9.84＝1133.57cm
2
4. the mean diameter Djcp=DI-hj=645-9.84=635.16cm of iron core yoke portion
5. the weight Gj=Djcp.Aj.r of iron core yoke portion * 3.14 * 10
-3=17182.04Kg
6. every circle secondary voltage (measurement coil) u2=222 * Aj * 10
-4=222 * 1133.57 * 10
-4=25.2V
Secondary is measured coil turn W2=4
Secondary is measured coil voltage: 25.2 * 4=100.8V
7, field coil number of turn W1:W1=U1/4.44 * f * Aj * 10
-4=380/4.44 * 50 * 1133.57 * 10
-4
=15 (circles)
The supply voltage 380V that U1 provides for the power station
8, exciting current I:I=(3.14 * Djcp * aw)/W1=(3.14 * 635.16 * 1.5)/15=199.4A
Annotate: r-siliconized plate proportion is looked in the iron core test specification
The required ampere turns of aw-stator core yoke portion's unit length is generally got aw=1.3-2.4 (At/cm)
Secondary is measured coil actual voltage value U
2 reality=94V
The real extreme value P of output power
Real=18900W
P=P
Real* (U
2 calculate÷ U
2 reality)
2
＝18900×(100.8÷94)
2
＝21733.3W
Specific loss: Δ P=P/Gj=21733.3 ÷ 17182.04=1.265 (W/Kg)
Annotate: find by the siliconized plate trade mark in the large ac machines stator-core test standard
Δ P≤1.5W/kg is qualified.
Claims (3)
1. hydroelectric generating set electricity generator stator core test unit, it include 380 volts of 400-800 pacify independent three-phase supply, be wrapped in field coil on the stator core, be wrapped in secondary on the stator core measure coil, with secondary measure coils from parallel connection of coils voltage table, with secondary measure the coil polyphone power meter and with the current transformer and the reometer of power meter polyphone, it is characterized in that: the described two ends that are wrapped in the field coil on the stator core directly with described independent three-phase supply in two-phase join, another voltage table and described field coil are in parallel.
2. hydroelectric generating set electricity generator stator core test unit according to claim 1 is characterized in that: the described two ends that are wrapped in the field coil on the stator core directly with described independent three-phase supply in A, C two-phase be connected in series mutually.
3. one kind is used for claim 1 or the 2 hydroelectric generating set electricity generator stator core test methods of installing, and it is characterized in that: it includes following steps:
When the given output power of described independent three-phase supply, measure the actual voltage value that described secondary is measured the coil two ends;
Under the various parameter conditions of stator core, calculate the calculating voltage value at described secondary measurement coil two ends when stator core passes through 10,000 Gausses;
The loss power of stator core during square the obtaining magnetic flux density and be 10,000 Gausses of ratio of measuring the calculating voltage value at coil two ends and actual voltage value according to described secondary with the product of the power of the actual output of secondary measurement coil; And then described loss power and the ratio of stator core calculated weight are the specific loss of stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100537887A CN101303394B (en) | 2008-07-09 | 2008-07-09 | Device and method for testing hydroelectric generating set electricity generator stator core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100537887A CN101303394B (en) | 2008-07-09 | 2008-07-09 | Device and method for testing hydroelectric generating set electricity generator stator core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101303394A true CN101303394A (en) | 2008-11-12 |
| CN101303394B CN101303394B (en) | 2010-07-28 |
Family
ID=40113393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100537887A Expired - Fee Related CN101303394B (en) | 2008-07-09 | 2008-07-09 | Device and method for testing hydroelectric generating set electricity generator stator core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101303394B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388377A (en) * | 2015-11-09 | 2016-03-09 | 北京信息科技大学 | Detection apparatus of stator iron core aging of old motor |
| CN105866556A (en) * | 2016-06-15 | 2016-08-17 | 湖南省湘电试验研究院有限公司 | Large-sized generator stator core loss detection method and device |
| CN105935668A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting instrument for current transformer iron cores |
| CN106053953A (en) * | 2016-05-31 | 2016-10-26 | 广西电网有限责任公司电力科学研究院 | High-precision current transformer iron core sorter |
| CN106066426A (en) * | 2016-05-31 | 2016-11-02 | 广西电网有限责任公司电力科学研究院 | A kind of intelligent electric current transformer iron core sorter |
| CN109375101A (en) * | 2018-09-13 | 2019-02-22 | 福建浦汇科技发展有限公司 | Measure the method and apparatus of stator core iron loss |
| CN112083231A (en) * | 2020-08-21 | 2020-12-15 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Generator stator core loss test device capable of reducing switching-on impact current |
| WO2023179153A1 (en) * | 2022-03-25 | 2023-09-28 | 西安热工研究院有限公司 | Generator iron core loss test system and method for reducing test impulse current |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201222093Y (en) * | 2008-07-09 | 2009-04-15 | 天津市天发重型水电设备制造有限公司 | Test device for hydraulic generator stator core |
-
2008
- 2008-07-09 CN CN2008100537887A patent/CN101303394B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388377A (en) * | 2015-11-09 | 2016-03-09 | 北京信息科技大学 | Detection apparatus of stator iron core aging of old motor |
| CN105935668A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting instrument for current transformer iron cores |
| CN106053953A (en) * | 2016-05-31 | 2016-10-26 | 广西电网有限责任公司电力科学研究院 | High-precision current transformer iron core sorter |
| CN106066426A (en) * | 2016-05-31 | 2016-11-02 | 广西电网有限责任公司电力科学研究院 | A kind of intelligent electric current transformer iron core sorter |
| CN105935668B (en) * | 2016-05-31 | 2018-06-19 | 广西电网有限责任公司电力科学研究院 | A kind of quick sorter of current transformer core |
| CN106066426B (en) * | 2016-05-31 | 2019-08-23 | 广西电网有限责任公司电力科学研究院 | A kind of intelligent electric current transformer iron core sorter |
| CN105866556A (en) * | 2016-06-15 | 2016-08-17 | 湖南省湘电试验研究院有限公司 | Large-sized generator stator core loss detection method and device |
| CN109375101A (en) * | 2018-09-13 | 2019-02-22 | 福建浦汇科技发展有限公司 | Measure the method and apparatus of stator core iron loss |
| CN112083231A (en) * | 2020-08-21 | 2020-12-15 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Generator stator core loss test device capable of reducing switching-on impact current |
| CN112083231B (en) * | 2020-08-21 | 2023-04-25 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Generator stator core loss test device capable of reducing closing impact current |
| WO2023179153A1 (en) * | 2022-03-25 | 2023-09-28 | 西安热工研究院有限公司 | Generator iron core loss test system and method for reducing test impulse current |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101303394B (en) | 2010-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101303394B (en) | Device and method for testing hydroelectric generating set electricity generator stator core | |
| CN104833928B (en) | A kind of large-scale power transformer remanent magnetism detection method | |
| CN105866556A (en) | Large-sized generator stator core loss detection method and device | |
| CN102621410B (en) | Test of adopting random waveform power supply to measure voltage current characteristics of mutual inductor and calculation method | |
| CN105510742A (en) | Experiment method and analysis calculation method for testing transformer volt-ampere characteristic by using low-frequency power supply | |
| CN201222093Y (en) | Test device for hydraulic generator stator core | |
| Fuchs et al. | Measurement of three-phase transformer derating and reactive power demand under nonlinear loading conditions | |
| CN106383328A (en) | Excitation characteristic test method applicable to ultrahigh-voltage TPY current transformers | |
| CN101557109A (en) | Three-phase four-cable power distribution system and method for installing balancer in the system | |
| CN102739066B (en) | Inductive current-to-voltage converter and method for measuring high frequency current | |
| CN206990758U (en) | A kind of generator unit stator iron loss experimental provision | |
| Geravandi et al. | Stray load losses determination methods of induction motors-A Review | |
| Ibrahim et al. | Novel equipment for the measurement of core losses in laminations for advanced machines | |
| CN105929250A (en) | Low-frequency measurement method for core loss of ferromagnetic element | |
| CN111220908B (en) | Stator core magnetization test method for avoiding 0-section resonance in flat wave compensation excitation | |
| CN108061872A (en) | The test method of remanent magnetism, device, storage medium and processor in current transformer | |
| CN205749690U (en) | A kind of Generator Stator core loss detection device | |
| CN106653336B (en) | A method of preparing the current transformer with simplification error test function | |
| Manyage et al. | New Epstein frame for core loss measurements at high frequencies and high flux densities | |
| CN107807340B (en) | Silicon steel lamination core performance simulation test platform | |
| CN204116587U (en) | The big current synthesis loop of electronic current mutual inductor | |
| CN103323722A (en) | Direct current magnetic bias fault simulation structure for transformer | |
| Damnjanovic et al. | The measurement and evaluation of distribution transformer losses under nonlinear loading | |
| CN202794489U (en) | Iron loss detecting device for stator core of medium and small AC motor | |
| CN113203893A (en) | Inductor and method for extracting alternating current resistance of coil winding of loosely coupled transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100728 Termination date: 20130709 |