CN202057745U - Detecting device for generator rotor winding interturn short-circuit state - Google Patents
Detecting device for generator rotor winding interturn short-circuit state Download PDFInfo
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- CN202057745U CN202057745U CN2011201108142U CN201120110814U CN202057745U CN 202057745 U CN202057745 U CN 202057745U CN 2011201108142 U CN2011201108142 U CN 2011201108142U CN 201120110814 U CN201120110814 U CN 201120110814U CN 202057745 U CN202057745 U CN 202057745U
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- rotor
- interturn short
- rotor winding
- circuit state
- sensor
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Abstract
The utility model relates to a detecting device for a generator rotor winding interturn short-circuit state, comprising a machine body assembly and an electric control mechanism; wherein, the machine body assembly is composed of a stator, a rotor and a rotor winding arranged in the rotor, a clearance layer is formed between the outer stator and the inner rotor, and a sensor is arranged in the clearance layer; a signal output end of the sensor is connected with the input end of a signal preprocessor of the outer electric control mechanism, and the output end of the signal preprocessor is connected with the input end of a digital processor. The beneficial effects of the utility model are that, a on-line detection can be realized, whether the rotor winding exists or occurs an interturn short-circuit fault can be diagnosed, and a slot occurring the fault can be positioned; whether the rotor winding occurs the interturn short-circuit fault and the slot position can be judged just by using the sensor to differentiate a rotary magnetic field in an air gap of the running synchronous generator and using the digital processor to analyze the differentiated waveform, thereby realizing the on-line detection of the generator rotor winding interturn short-circuit state.
Description
Technical field
The utility model relates to a kind of generator short circuit status detection device, relates in particular 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.Traditional generator shorted-turn fault detection method has single radial cut transformer method, two opening transformer methods, AC impedance and power attenuation rate method, dc resistance method, generator zero load and short circuit curve experimental method, but all can not under actual operating mode, detect, the condition of its detection and the equivalence of actual operating mode are also poor, can't realize that operation detects, dc resistance method for example, 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.So far, under the generator normal operating condition, prior art still can not provide the information of shorted-turn fault judgement, localization of fault and the fault order of severity simultaneously, therefore needs certain improvement.
The utility model content
At above defective, whether the utility model provides a kind of and can realize online detection and diagnose the rotor winding to exist or shorted-turn fault, the pick-up unit of the generator rotor interturn short-circuit state of the groove position of breaking down, location simultaneously take place, to solve many deficiencies of prior art.
For achieving the above object, the utility model is by the following technical solutions:
A kind of pick-up unit of generator rotor interturn short-circuit state, comprise cylinder block set and electrical control mechanism two parts, cylinder block set wherein is made up of stator, rotor and the rotor winding that is arranged in the rotor, form clearance layer between described stator and the inner rotator, a sensor is set in this clearance layer; The signal output part of described sensor is connected with the signal preprocessor input end of external electric control mechanism, and described signal preprocessor output terminal is connected with the input end of digital processing unit.Described sensing station is arranged at the axial location of rotor, and described signal preprocessor inside is linked in sequence successively by amplifier, wave filter, level lifting circuit and A/D converter and forms.
The beneficial effect of the pick-up unit of generator rotor interturn short-circuit state described in the utility model is: practical, can realize that whether online detection and diagnosis rotor winding exist or shorted-turn fault takes place, locate the groove position of breaking down simultaneously; By sensor the rotating magnetic field in the operating synchronous generator air gap is carried out differential, 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
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the housing construction synoptic diagram of the pick-up unit of the described generator rotor interturn short-circuit state of the utility model embodiment;
Fig. 2 is the electrical control mechanism principle schematic of the pick-up unit of the described generator rotor interturn short-circuit state of the utility model embodiment;
Fig. 3 is the signal preprocessor part principle schematic of the pick-up unit of the described generator rotor interturn short-circuit state of the utility model embodiment.
Among the figure:
1, stator; 2, clearance layer; 3, rotor; 4, sensor; 5, rotor winding; 6, signal preprocessor; 7, digital processing unit; 8, display; 9, communication interface; 10, keyboard; 11, power supply; 12, amplifier; 13, wave filter; 14, level lifting circuit; 15, A/D converter.
Embodiment
As Figure 1-3, the pick-up unit of the described generator rotor interturn short-circuit state of the utility model embodiment, comprise cylinder block set and electrical control mechanism two parts, cylinder block set wherein is made up of stator 1, rotor 3 and the rotor windings 5 that are arranged in the rotor 3, form clearance layer 2 between outer stator 1 and the inner rotator 3, a sensor 4 is set in the described clearance layer 2; Described sensor 4 is for gathering the rotor slot leakage field gesture differential detecting coil in the air-gap field, its particular location is arranged at 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 is connected with signal preprocessor 6 input ends of external electric control mechanism, described signal preprocessor 6 output terminals are connected with the input end of digital processing unit 7, these digital processing unit 7 external input terminals also are connected to keyboard 10 and power supply 11 respectively, and these digital processing unit 7 outside output terminals also are connected to communication interface 9 and display 8.In addition, the above signal preprocessor 6 inside is linked in sequence successively by amplifier 12, wave filter 13, level lifting circuit 14 and A/D converter 15 and forms, and amplifier 12 wherein is connected with sensor 4, and A/D converter 15 is connected with digital processing unit 7.
The pick-up unit of the described generator rotor interturn short-circuit state of above the utility model embodiment, when work, described sensor 4 collects the data waveform of generator, a groove winding of one of them crest value respective rotor 3, the signal of gathering is fainter, through amplifier 12, wave filter 13, send in the Dsp digital processing unit 7 after level lifting circuit 14 and the A/D converter 15, the data of gathering are carried out analyzing and processing, after the winding generation turn-to-turn short circuit in a certain groove, significantly recessed contracting appears in the leakage field gesture crest that is reflected as this groove correspondence on leakage field gesture waveform intuitively, Dsp digital processing unit 7 can extract the wave crest point of each groove correspondence, automatically finish Fault Diagnosis by operational analysis, the fault groove location and the fault order of severity are analyzed, and finish demonstration to result by Lcd display 8 and communication interface 9 simultaneously, functions such as communication.In addition, dynamic measuring method comprises 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, wherein so that radially differential coil method effect is best, and simple.
Above embodiment is more preferably embodiment a kind of of the utility model, and the common variation that those skilled in the art carry out in the technical program scope and replacing should be included in the protection domain of the present utility model.
Claims (3)
1. the pick-up unit of a generator rotor interturn short-circuit state, comprise cylinder block set and electrical control mechanism two parts, cylinder block set wherein is made up of stator (1), rotor (3) and the rotor winding (5) that is arranged in the rotor (3), it is characterized in that: form clearance layer (2) between described stator (1) and the inner rotator (3), a sensor (4) is set in this clearance layer (2); The signal output part of described sensor (4) is connected with signal preprocessor (6) input end of external electric control mechanism, and described signal preprocessor (6) output terminal is connected with the input end of digital processing unit (7).
2. the pick-up unit of generator rotor interturn short-circuit state according to claim 1, it is characterized in that: described sensor (4) position is arranged at the axial location of rotor (3).
3. the pick-up unit of generator rotor interturn short-circuit state according to claim 1 is characterized in that: inner being linked in sequence successively by amplifier (12), wave filter (13), level lifting circuit (14) and A/D converter (15) of described signal preprocessor (6) formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201108142U CN202057745U (en) | 2011-04-15 | 2011-04-15 | Detecting device for generator rotor winding interturn short-circuit state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201108142U CN202057745U (en) | 2011-04-15 | 2011-04-15 | Detecting device for generator rotor winding interturn short-circuit state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057745U true CN202057745U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201108142U Expired - Lifetime CN202057745U (en) | 2011-04-15 | 2011-04-15 | Detecting device for generator rotor winding interturn short-circuit state |
Country Status (1)
| Country | Link |
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| CN (1) | CN202057745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2011
- 2011-04-15 CN CN2011201108142U patent/CN202057745U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HU NAN SHIDAI MINING MACHINERY MANUFACTURE CO., LT Free format text: FORMER OWNER: CHANGSHA GUOLANG ENERGY-SAVING TECH. CO., LTD. Effective date: 20120611 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430103 CHANGSHA, HUNAN PROVINCE TO: 410000 CHANGSHA, HUNAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120611 Address after: 410000, No. 46, Lu Feng Road, Yuelu District, Hunan, Changsha Patentee after: Hunan Era Mine Machinery Manufacturing Co.,Ltd. Address before: 430103 Hunan province Changsha Furong district Zhanggongling Longping high tech Park Dan technology venture building 11 floor Patentee before: Changsha Guolang Energy-Saving Technology Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20111130 Effective date of abandoning: 20130628 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |