CN101101319A - Generator rotor interturn short-circuit state detection device - Google Patents
Generator rotor interturn short-circuit state detection device Download PDFInfo
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- CN101101319A CN101101319A CNA2007100178841A CN200710017884A CN101101319A CN 101101319 A CN101101319 A CN 101101319A CN A2007100178841 A CNA2007100178841 A CN A2007100178841A CN 200710017884 A CN200710017884 A CN 200710017884A CN 101101319 A CN101101319 A CN 101101319A
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Abstract
The invention is a detector of inter-turn short-circuit state of generator rotor windings, comprising: stator, rotor and rotor windings arranged in the rotor, and air gap between stator and rotor, where a sensor is arranged in the air gap between stator and rotor, the signal output end of the sensor is connected with input end of signal preprocessor, the output end of the signal preprocessor is connected with input end of a DSP, the DSP is connected with keyboard and power supply, output end of the DSP is equipped with communication interface and LCD. And it differentiates rotary magnetic field in air gap of operating synchronous generator and analyzes differential waveform of the DSP to be able to determine whether there is inter-turn short-circuit failure of rotor windings and the positions of the rotor windings, thus implementing on-line detection for inter-turn short-circuit state of rotor windings.
Description
Technical field
The present invention relates to a kind of generator short circuit status detection device, be specifically related to a kind of pick-up unit of generator rotor interturn short-circuit state.
Background technology
Generator rotor interturn short-circuit is a kind of common electric fault, and slight turn-to-turn short circuit can not have much impact to generator operation, if fault continues development, with the safety of entail dangers to generator and electric system.Rotor winding to genset carries out status monitoring, is intended to find hidden failure, prevents the generation of serious accident.Therefore, the mechanism and the method for diagnosing status of research rotor interturn short-circuit fault have important practical significance.
At present, for the judgement of generator amature shorted-turn fault, general means are carried out under static operating mode both at home and abroad, promptly can only " have regular physical checkups " to it, and can not continuously carry out the inspection and the judgement of " health status " in its operating period.On-line monitoring about the generator turn-to-turn short circuit still is in theoretical research stage, and present domestic generating plant is not seen the example that this type systematic successfully puts into operation at the scene as yet.
At present, the national standard of China has been formulated under the rotor static state AC impedance and rotor and is dynamically descended air gap coil to survey these two kinds of methods to come the detection rotor coil whether shorted-turn fault takes place.Though the former is sensitive, belongs to offline inspection.The latter makes full use of the real time on-line monitoring new method that the measured data of the former mounted sensor of generator are carried out the initial failure diagnosis.
Traditional generator shorted-turn fault detection method has single radial cut transformer method, two opening transformer method, AC impedance and power attenuation rate method, dc resistance method, generator zero load and short circuit curve experimental method.Above method of testing is used for many years, and has accumulated many experiences.But these methods respectively have its relative merits said method all can not detect under actual operating mode, and the condition of its detection and the equivalence of actual operating mode are also poor, can't realize that operation detects.Dc resistance method, generator zero load and short circuit curve experimental method can not accurately record the groove position that turn-to-turn short circuit takes place, can only be as the reference of short trouble and development trend thereof.
Also because the dynamic turn-to-turn short circuit in the actual motion often disappears with rotor static or alleviates, said method can't be caught dynamic shorted-turn fault.
For the online detection of rotor interturn short-circuit, research is arranged all both at home and abroad at present, main method has: detecting coil method, exciting current method, stator circulation diagnostic method and RSO (Repetitive surgeoscilloscope) repetition pulse detection method.Domestic research mainly contains: carry out interturn short-circuit failure diagnosing by analysis generator exciting current and generator machine end variable; Carry out interturn short-circuit failure diagnosing by analysis generator exciting current harmonic characteristic; Based on wavelet theory detecting coil method waveform is analyzed under the short circuit operating mode, realized the location of short dot.Foreign study mainly contains: by the differential detecting coil method of Albright proposition; Muscovite B.T Ka Ciman proposes utilizes circulation in the stator parallel branch to detect the method for shorted-turn fault; It is ripe not enough at present that traveling wave method is used for the inline diagnosis of rotor interturn short-circuit.In the interturn short-circuit failure diagnosing application facet, US Westinghouse company is by the method for the flux waveforms of analysis detecting coil induced potential integration, and Britain GEC company adopts the potential waveform harmonic analytic method.Up to the present, under the generator normal operating condition, a certain achievement in research both domestic and external still can not provide the information of shorted-turn fault judgement, localization of fault and the fault order of severity simultaneously.
China country Machinery Ministry has been formulated " hidden pole type synchronous generator rotor turn-to-turn short circuit measuring method " standard in 1996, i.e. JB/T8446-1996, and 2005, this standard has been carried out revision again, new standard number is JB/T8446-2005.2 kinds of diagnostic methods have been formulated in the diagnosis of generator amature turn-to-turn short circuit, promptly static down AC impedence method and dynamic under the differential dynamic measurement of pile, fault determined to have directive significance.
Belong to the generator rotor interturn short-circuit state pick-up unit.Mainly constitute by differential detecting coil, signal condition module, A/D conversion, dsp operation processing unit, LCD display terminal and special-purpose fault diagnosis software etc., realized the state-detection of generator rotor interturn short-circuit fault, be applicable to that the full operating mode of turbodynamo promptly, fault detect under short circuit operating mode, idle condition and the load behavior, can diagnose whether to exist or turn-to-turn short circuit and the groove position of breaking down, location take place, give the forecast analysis of the order of severity that is out of order simultaneously.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned technology, providing a kind of can onlinely detect, and whether diagnosis rotor winding exist or shorted-turn fault takes place, locatees the pick-up unit of the generator rotor interturn short-circuit state of the groove position of breaking down.
For achieving the above object, the technical solution used in the present invention is: comprise stator rotor and be arranged on the interior rotor winding of rotor, the air gap that constitutes between stator and the rotor, be characterized in, be provided with sensor in the air gap between stator and rotor, the signal output part of this sensor connects the input end of signal preprocessor, the input end of the output termination Dsp digital processing unit of signal preprocessor, the Dsp digital processing unit also is connected with keyboard, power supply, and the output terminal of Dsp digital processing unit also is provided with communication interface and Lcd display.
Sensor of the present invention is for gathering the rotor slot leakage field gesture differential detecting coil in the air-gap field, and its particular location is in the axial optional position of rotor, and radially the distance apart from rotor surface is the 1/4-3/4 of airbond length; Signal preprocessor comprises amplifier, wave filter, level lifting circuit and the A/D converter that links to each other successively, and wherein amplifier is connected with sensor, and A/D converter is connected with the Dsp digital processing unit.
The present invention carries out differential by sensor with the rotating magnetic field in the operating synchronous generator air gap, and be that decidable rotor winding has or not the position of shorted-turn fault and place groove thereof to differentiated waveform analysis, thereby realized online detection to the motor rotor winding interturn short-circuit state through the Dsp digital processing unit.
Description of drawings
Fig. 1 is a generator Structure synoptic diagram of the present invention;
Fig. 2 is an one-piece construction synoptic diagram of the present invention;
Fig. 3 is the structural representation of signal preprocessor 6 of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1,2, the present invention includes stator 1 rotor 3 and be arranged on rotor winding 5 in the rotor 3, the air gap 2 that constitutes between stator 1 and the rotor 3, be provided with sensor 4 in the air gap 2 between stator 1 and rotor 3, sensor 4 is for gathering the rotor slot leakage field gesture differential detecting coil in the air-gap field, its particular location is in the axial optional position of rotor 3, radially the distance apart from rotor 3 surfaces is the 1/4-3/4 of airbond length, the signal output part of this sensor 4 connects the input end of signal preprocessor 6, the input end of the output termination Dsp digital processing unit 7 of signal preprocessor 6, Dsp digital processing unit 7 also with keyboard 10, power supply 11 is connected, and the output terminal of Dsp digital processing unit 7 also is provided with communication interface 9 and Lcd display 8.
Referring to Fig. 3, signal preprocessor 6 of the present invention comprises amplifier 12, wave filter 13, level lifting circuit 14 and the A/D converter 15 that links to each other successively, and wherein amplifier 12 is connected with sensor 4, and A/D converter 15 is connected with Dsp digital processing unit 7.
Dynamic measuring method of the present invention has the indirect differentiation (adding differentiating circuit) of S.C. method and Hall element method, and tangential differential coil method and radially the direct differentiation method etc. of differential coil method is multiple.Repeatedly survey proof through the scene, radially differential coil method effect is best and simple.
Claims (3)
1, the pick-up unit of generator rotor interturn short-circuit state, comprise stator (1) rotor (3) and be arranged on the interior rotor winding (5) of rotor (3), the air gap (2) that constitutes between stator (1) and the rotor (3), it is characterized in that: be provided with sensor (4) in the air gap (2) between stator (1) and rotor (3), the signal output part of this sensor (4) connects the input end of signal preprocessor (6), the input end of the output termination Dsp digital processing unit (7) of signal preprocessor (6), Dsp digital processing unit (7) also with keyboard (10), power supply (11) is connected, and the output terminal of Dsp digital processing unit (7) also is provided with communication interface (9) and Lcd display (8).
2, the pick-up unit of generator rotor interturn short-circuit state according to claim 1, it is characterized in that: said sensor (4) is for gathering the rotor slot leakage field gesture differential detecting coil in the air-gap field, its particular location is in the axial optional position of rotor (3), and radially the distance apart from rotor (3) surface is the 1/4-3/4 of airbond length.
3, the pick-up unit of generator rotor interturn short-circuit state according to claim 1, it is characterized in that: said signal preprocessor (6) comprises amplifier (12), wave filter (13), level lifting circuit (14) and the A/D converter (15) that links to each other successively, wherein amplifier (12) is connected with sensor (4), and A/D converter (15) is connected with Dsp digital processing unit (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100178841A CN101101319A (en) | 2007-05-18 | 2007-05-18 | Generator rotor interturn short-circuit state detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100178841A CN101101319A (en) | 2007-05-18 | 2007-05-18 | Generator rotor interturn short-circuit state detection device |
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| CN101101319A true CN101101319A (en) | 2008-01-09 |
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| CNA2007100178841A Pending CN101101319A (en) | 2007-05-18 | 2007-05-18 | Generator rotor interturn short-circuit state detection device |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988945A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Method for diagnosing interturn short circuit of rotor winding |
| CN102081129A (en) * | 2010-11-10 | 2011-06-01 | 中国矿业大学 | Method for diagnosing short circuit fault of stator winding of switched reluctance motor |
| CN102096042A (en) * | 2010-12-07 | 2011-06-15 | 哈尔滨工业大学 | System for testing linear motor characteristics |
| CN103116109A (en) * | 2012-12-07 | 2013-05-22 | 哈尔滨电机厂有限责任公司 | Nonsalient pole type synchronous generator exciting winding turn-to-turn short circuit test system |
| CN103135025A (en) * | 2011-11-30 | 2013-06-05 | 岭澳核电有限公司 | Searching method for short circuit points between transformer core frames of million-kilowatt nuclear power station |
| US8903664B2 (en) | 2011-06-22 | 2014-12-02 | General Electric Company | System and method for use in monitoring synchronous machines |
| CN104515923A (en) * | 2013-09-27 | 2015-04-15 | 珠海格力电器股份有限公司 | Testing device for stepping motor |
| CN105021989A (en) * | 2015-07-20 | 2015-11-04 | 哈尔滨理工大学 | Generator stator bar inter-strand circulation loss testing system and measuring method realized by using system |
| CN105486973A (en) * | 2015-12-02 | 2016-04-13 | 河北省电力建设调整试验所 | Nanosecond steep leading edge index repetition pulse generator |
| CN105527537A (en) * | 2014-09-28 | 2016-04-27 | 苏州热工研究院有限公司 | Device and method for generator rotor winding turn-to-turn insulation fault diagnosis |
| CN105866685A (en) * | 2016-05-26 | 2016-08-17 | 广西玉柴博耐特电器有限公司 | Special equipment for detecting rotor of starter and detection method |
| CN106706028A (en) * | 2015-11-13 | 2017-05-24 | Abb技术有限公司 | Method and system used for detecting state of motor |
| CN107110913A (en) * | 2015-01-14 | 2017-08-29 | 西门子公司 | Method for detecting turn-to-turn short circuit |
| CN108693438A (en) * | 2018-05-28 | 2018-10-23 | 国电联合动力技术有限公司 | A kind of Wind turbines generator winding faults intelligent diagnosis system and method |
| CN109507558A (en) * | 2019-01-14 | 2019-03-22 | 广东电网有限责任公司 | A kind of turn insulation defect positioning method, the apparatus and system of coil with iron core |
| CN110531205A (en) * | 2019-08-23 | 2019-12-03 | 华北电力科学研究院有限责任公司 | Short Circuit Between Generator Rotor Windings fault diagnosis and the method and device of positioning |
| CN111060844A (en) * | 2019-12-09 | 2020-04-24 | 南京航空航天大学 | Interturn short-circuit fault diagnosis method and device for high-speed train traction transmission system |
| CN111579991A (en) * | 2020-06-30 | 2020-08-25 | 广东通德电力工程有限公司 | Positioning device for turn-to-turn short circuit fault of generator rotor and using method |
| CN111983450A (en) * | 2020-08-18 | 2020-11-24 | 哈尔滨工业大学 | Electric automobile driving motor fault diagnosis system based on embedded detection coil |
| CN113093054A (en) * | 2021-04-08 | 2021-07-09 | 哈尔滨理工大学 | Large-scale generator stator transposition bar strand short-circuit fault positioning method |
| CN113359027A (en) * | 2021-05-14 | 2021-09-07 | 重庆文理学院 | Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method with low spatial magnetic field resolution requirement |
| US11509255B2 (en) | 2019-12-04 | 2022-11-22 | Hamilton Sundstrand Corporation | Electric machine fault detection scheme |
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2007
- 2007-05-18 CN CNA2007100178841A patent/CN101101319A/en active Pending
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988945A (en) * | 2009-08-07 | 2011-03-23 | 华东电力试验研究院有限公司 | Method for diagnosing interturn short circuit of rotor winding |
| CN102081129A (en) * | 2010-11-10 | 2011-06-01 | 中国矿业大学 | Method for diagnosing short circuit fault of stator winding of switched reluctance motor |
| CN102096042A (en) * | 2010-12-07 | 2011-06-15 | 哈尔滨工业大学 | System for testing linear motor characteristics |
| CN102096042B (en) * | 2010-12-07 | 2013-02-13 | 哈尔滨工业大学 | System for testing linear motor characteristics |
| US8903664B2 (en) | 2011-06-22 | 2014-12-02 | General Electric Company | System and method for use in monitoring synchronous machines |
| CN103135025A (en) * | 2011-11-30 | 2013-06-05 | 岭澳核电有限公司 | Searching method for short circuit points between transformer core frames of million-kilowatt nuclear power station |
| CN103135025B (en) * | 2011-11-30 | 2016-04-06 | 岭澳核电有限公司 | The lookup method of short dot between the transformer core frame of million kilowatt nuclear power station |
| CN103116109A (en) * | 2012-12-07 | 2013-05-22 | 哈尔滨电机厂有限责任公司 | Nonsalient pole type synchronous generator exciting winding turn-to-turn short circuit test system |
| CN104515923A (en) * | 2013-09-27 | 2015-04-15 | 珠海格力电器股份有限公司 | Testing device for stepping motor |
| CN104515923B (en) * | 2013-09-27 | 2017-08-29 | 珠海格力电器股份有限公司 | Testing device for stepping motor |
| CN105527537A (en) * | 2014-09-28 | 2016-04-27 | 苏州热工研究院有限公司 | Device and method for generator rotor winding turn-to-turn insulation fault diagnosis |
| CN107110913A (en) * | 2015-01-14 | 2017-08-29 | 西门子公司 | Method for detecting turn-to-turn short circuit |
| CN105021989A (en) * | 2015-07-20 | 2015-11-04 | 哈尔滨理工大学 | Generator stator bar inter-strand circulation loss testing system and measuring method realized by using system |
| CN105021989B (en) * | 2015-07-20 | 2018-01-09 | 哈尔滨理工大学 | Circulation loss test system and the measuring method realized using the system between generator stator bar strand |
| CN106706028B (en) * | 2015-11-13 | 2021-03-02 | Abb技术有限公司 | Method and system for detecting motor state |
| CN106706028A (en) * | 2015-11-13 | 2017-05-24 | Abb技术有限公司 | Method and system used for detecting state of motor |
| CN105486973B (en) * | 2015-12-02 | 2018-07-20 | 国网河北能源技术服务有限公司 | A kind of nanosecond steep-front index repetition pulse generating means |
| CN105486973A (en) * | 2015-12-02 | 2016-04-13 | 河北省电力建设调整试验所 | Nanosecond steep leading edge index repetition pulse generator |
| CN105866685A (en) * | 2016-05-26 | 2016-08-17 | 广西玉柴博耐特电器有限公司 | Special equipment for detecting rotor of starter and detection method |
| CN108693438A (en) * | 2018-05-28 | 2018-10-23 | 国电联合动力技术有限公司 | A kind of Wind turbines generator winding faults intelligent diagnosis system and method |
| CN109507558A (en) * | 2019-01-14 | 2019-03-22 | 广东电网有限责任公司 | A kind of turn insulation defect positioning method, the apparatus and system of coil with iron core |
| CN110531205A (en) * | 2019-08-23 | 2019-12-03 | 华北电力科学研究院有限责任公司 | Short Circuit Between Generator Rotor Windings fault diagnosis and the method and device of positioning |
| CN110531205B (en) * | 2019-08-23 | 2021-05-28 | 华北电力科学研究院有限责任公司 | Method and device for diagnosing and positioning turn-to-turn short circuit fault of generator rotor |
| US11509255B2 (en) | 2019-12-04 | 2022-11-22 | Hamilton Sundstrand Corporation | Electric machine fault detection scheme |
| CN111060844A (en) * | 2019-12-09 | 2020-04-24 | 南京航空航天大学 | Interturn short-circuit fault diagnosis method and device for high-speed train traction transmission system |
| CN111579991A (en) * | 2020-06-30 | 2020-08-25 | 广东通德电力工程有限公司 | Positioning device for turn-to-turn short circuit fault of generator rotor and using method |
| CN111983450A (en) * | 2020-08-18 | 2020-11-24 | 哈尔滨工业大学 | Electric automobile driving motor fault diagnosis system based on embedded detection coil |
| CN113093054B (en) * | 2021-04-08 | 2021-10-08 | 哈尔滨理工大学 | Large-scale generator stator transposition bar strand short-circuit fault positioning method |
| CN113093054A (en) * | 2021-04-08 | 2021-07-09 | 哈尔滨理工大学 | Large-scale generator stator transposition bar strand short-circuit fault positioning method |
| CN113359027A (en) * | 2021-05-14 | 2021-09-07 | 重庆文理学院 | Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method with low spatial magnetic field resolution requirement |
| CN113359027B (en) * | 2021-05-14 | 2023-03-21 | 重庆文理学院 | Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method with low spatial magnetic field resolution requirement |
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