CN106707093A - Synchronization generator stator turn-to-turn short circuit detection method based on RSO method - Google Patents
Synchronization generator stator turn-to-turn short circuit detection method based on RSO method Download PDFInfo
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- CN106707093A CN106707093A CN201611219523.0A CN201611219523A CN106707093A CN 106707093 A CN106707093 A CN 106707093A CN 201611219523 A CN201611219523 A CN 201611219523A CN 106707093 A CN106707093 A CN 106707093A
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- turn
- short circuit
- detection method
- rso
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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)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention discloses a synchronization generator stator turn-to-turn short circuit detection method based on a RSO method; the detection method needs the following devices: a pulse generator (1), a data acquisition card (2), a computer (3); one-phase lead out wire of the detected synchronization generator stator conjunction box is connected with the pulse generator (like U1 U2, V1V2, W1W2); the pulse generator is connected with the data acquisition card; the data acquisition card is connected with the computer. The synchronization generator stator turn-to-turn short circuit detection method is an offline detection method, simple in operation steps, high in sensitivity, can accurately detect slight stator turn-to-turn short circuit faults, can determine abnormal point positions and timely send feedbacks, thus effectively preventing motor accidents caused by stator turn-to-turn short circuit faults.
Description
Technical field
The present invention relates to the detection of large-scale steamer motor status and fault diagnosis field, and in particular to a kind of based on RSO methods
Synchronous generator stator turn-to-turn short circuit detection method.
Background technology
Synchronous generator is the important component of power system, is responsible for main power generation task.With China's electricity
The fast development of power industry and the continuous improvement of generator installed capacity, people to the demand of engine health reliability increasingly
It is high.Interturn in stator windings short trouble is a kind of occurrence probability generator failure higher, and slight failure will not to generator operation
Too much influence is produced, if failure continues to develop, it will raise stator winding temperature, influence motor output voltage waveforms,
Cause other mechanical breakdowns, motor operation may be destroyed when serious, cause power outage.Therefore, for synchronous generator stator
The detection of shorted-turn fault be very necessary.
Repetition pulse method RSO is a kind of simply and effectively turn-to-turn short circuit detection method, low by one using theory of wave propagation
Pressure pulse signal injects winding, by detecting and analyzes the back wave of impulse wave and the resonse characteristic of refracted wave, judges short
The Position Approximate of road trouble point.
Found by the retrieval to existing document, existing synchronous generator stator fault detection and diagnosis method, mostly should
Motor constraining equation (typical method includes multi-loop analysis method) is solved with some physical laws and mathematical knowledge, but by
When motor stator failure, internal electromagnetic relationship is complicated, and analysis result and the actual conditions of such method have certain error；
RSO is simple to operate for repetition pulse method, and accuracy is higher, in engineering practice, is widely used in the failure of synchronous generator rotor
Detection, but do not there is research to detect the shorted-turn fault that this detection method is applied to stator.
The content of the invention
The purpose of the present invention overcomes deficiencies of the prior art, proposes a kind of synchronous generator based on RSO methods
Interturn in stator windings method for detecting short circuit.
The present invention is achieved through the following technical solutions：For asking that current interturn in stator windings short circuit failure detection method is present
Topic, RSO methods are applied to wherein.The method equipment operation is simple, it is only necessary to which testing equipment is connected to above the terminal box of stator；
Test voltage is low, and operating process has more security；Sensitivity is higher, can more accurately judge interturn in stator windings insulation latent defect
With the position of abnormity point, feedback, effectively prevents because of the motor accident that interturn in stator windings short trouble is triggered in time.
Specific operating procedure is (line graph of device is shown in accompanying drawing 2) as described below：
1st, synchronous generator stator three-phase windings are individually carried out into the inspection of turn-to-turn short circuit to every phase winding by being mutually divided into 3 groups
Survey, here by taking A phases as an example (A phase windings correspondence stator junction box U1, U2 joint).
2nd, by I mouthfuls of impulse generator (1) and O mouthfuls respectively with the U1 of stator junction box, U2 joints connection.
3rd, CN1 mouthfuls of data collecting card (2) and CN2 mouthfuls 1 mouthful and 2 mouthfuls respectively with impulse generator (1) is connected.
4th, data collecting card (2) and computer (3) are connected, to ensure the accurate operation of computer software, it is necessary to insert
Upper dongle.
5th, starting impulse generator (1), observes computer (3) detection image.
The Mathematical Modeling and its derivation of RSO interturn in stator windings method for detecting short circuit of the present invention are as follows：
1st, the distributed constant equivalent-circuit model (see accompanying drawing 4) of the phase winding of stator one is built, to simplify the analysis, ignores winding
Different circles between mutual inductance and turn-to-turn capacitance, it is assumed that parameter of the winding per circle is equal and be uniformly distributed.
2nd, that stator winding carried out into M deciles is discrete, and obtaining M has limit for length's unit and 2M node, the electricity at each node
Pressure u and electric current i is constituted by preceding traveling wave and anti-traveling wave, both superimposed voltage and current values constituted at the node, to appointing
One cell columns write the telegraph equation of transmission line, then have：
3rd, in RSO experiments, it is assumed that top impedance matching, terminal open circuit, equation is write to m-th finite element row, willDifference discrete treatment is carried out, is obtained：
Wherein, h=l/M is spatial spreading step-length, and l is the length of stator winding, u2m(i2m), u'2m(i'2m) represent node
Preceding traveling wave and anti-traveling wave, u2m+1(i2m+1), u'2m+1(i'2m+1) it is amount to be asked, m=1,2 ... M.
4th, the constraints of top end is brought into linear state equations group that equation obtains 4M ranks
F is 4M × 4M rank constant matrices in above formula：
X=[u3,u5,…u2M+1,i2,i4,…i2M,u'3,u'5,…u'2M+1,i'2,i'4,…i'2M]T (5)
5th, when not existing turn-to-turn short circuit in stator winding, matrix F meets：
F12=F21=0 (7)
6th, when there is turn-to-turn short circuit in stator winding, it is assumed that k-th front end and j-th front end of finite element of finite element
During connection, have：
To dx/dt=(xi+1-xi)/dt, formula (3) is solved using implicit Euler method：
xi+1=(I-dtF)-1(xi+dtf) (11)
Brief description of the drawings
Fig. 1 is structure chart of the present invention.
Fig. 2 is the mode of connection of detection means of the present invention.
Fig. 3 is computer software interface of the present invention.
Fig. 4 is the distributed constant equivalent-circuit model of winding.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Such as a kind of synchronous generator stator turn-to-turn short circuit detection methods based on RSO methods of Fig. 1, what the method was needed to use sets
It is standby to include impulse generator, data collecting card and computer.Be detected a phase lead-out wire of synchronous generator stator terminal box with
Impulse generator connect (such as D1D4, D2D5, D3D6), impulse generator be connected with data collecting card, data collecting card and calculating
Machine is connected.
Such as Fig. 2, the impulse generator is the pulse generation of Sumatron companies of U.S. shorted-turn fault detecting system
Device part, input voltage is the 90%~120% of 220VAC, and working frequency is 50Hz, and output no-load crest voltage is 8-12V.
Described data collecting card uses the USB5133 data collecting cards of NI companies, and maximum input voltage scope is -20V~20V, defeated
Enter sample rate for 100MS/s.By I mouthfuls of impulse generator and O mouthfuls respectively with the D1 of stator junction box, D3 joints connection；By number
It is connected with 1 mouthful of impulse generator D and 2 mouthfuls respectively according to CN1 mouthfuls of capture card and CN2 mouthfuls；Data collecting card and computer are connected
Connect.
Claims (8)
1. a kind of synchronous generator stator turn-to-turn short circuit detection method based on RSO methods, it is characterised in that needed for the detection method
Equipment includes impulse generator (1), data collecting card (2), computer (3).The terminal box of tested motor stator and pulse generation
Device (1) is connected, and impulse generator (1) is connected with data collecting card (2), and data collecting card (2) is connected with computer (3).
2. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 1, it is characterised in that
The method is a kind of off-line checking method, and RSO methods are applied into interturn in stator windings short-circuit detecting, can detect that slight short circuit event
Barrier, feeds back in time.
3. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 1, it is characterised in that
Impulse generator (1) is the impulse generator part of Sumatron companies of U.S. shorted-turn fault detecting system.
4. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 1, it is characterised in that
Data collecting card (2) uses the USB5133 data collecting cards of NI companies.
5. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 1, it is characterised in that
Computer (3) writes interturn in stator windings short-circuit analysis software.
6. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 2, it is characterised in that
The input voltage of impulse generator (1) is the 90%~120% of 220VAC, and working frequency is 50Hz, output no-load crest voltage
It is 8-12V.
7. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 3, it is characterised in that
Data collecting card (2) maximum input voltage scope is -20V~20V, and input sampling rate is 100MS/s.
8. the synchronous generator stator turn-to-turn short circuit detection method based on RSO methods according to claim 4, it is characterised in that
The interturn in stator windings short-circuit analysis software of computer (3), is programmed using Labview.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219523.0A CN106707093A (en) | 2016-12-26 | 2016-12-26 | Synchronization generator stator turn-to-turn short circuit detection method based on RSO method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219523.0A CN106707093A (en) | 2016-12-26 | 2016-12-26 | Synchronization generator stator turn-to-turn short circuit detection method based on RSO method |
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| CN106707093A true CN106707093A (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611219523.0A Pending CN106707093A (en) | 2016-12-26 | 2016-12-26 | Synchronization generator stator turn-to-turn short circuit detection method based on RSO method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142963A (en) * | 2018-06-05 | 2019-01-04 | 广西电网有限责任公司桂林供电局 | A kind of shorted-turn fault positioning system and method |
| CN110346685A (en) * | 2019-07-16 | 2019-10-18 | 杭州核诺瓦科技有限公司 | The device and method of large-size machine stator winding turn-to-turn state-detection |
| CN113433453A (en) * | 2021-05-20 | 2021-09-24 | 大唐信阳发电有限责任公司 | Generator rotor turn-to-turn short circuit diagnosis method based on RSO method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133925Y (en) * | 2007-09-19 | 2008-10-15 | 郑役军 | Turn-to-turn short circuit test device |
| CN105203912A (en) * | 2015-10-27 | 2015-12-30 | 西安浩能电气科技有限公司 | Steep front edge index repeat pulse generating device used for generator rotor inter-turn short circuit |
| 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 |
| CN106022719A (en) * | 2016-05-16 | 2016-10-12 | 华北电力科学研究院有限责任公司 | Large-scale generator insulation data management system |
-
2016
- 2016-12-26 CN CN201611219523.0A patent/CN106707093A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133925Y (en) * | 2007-09-19 | 2008-10-15 | 郑役军 | Turn-to-turn short circuit test device |
| 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 |
| CN105203912A (en) * | 2015-10-27 | 2015-12-30 | 西安浩能电气科技有限公司 | Steep front edge index repeat pulse generating device used for generator rotor inter-turn short circuit |
| CN106022719A (en) * | 2016-05-16 | 2016-10-12 | 华北电力科学研究院有限责任公司 | Large-scale generator insulation data management system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142963A (en) * | 2018-06-05 | 2019-01-04 | 广西电网有限责任公司桂林供电局 | A kind of shorted-turn fault positioning system and method |
| CN109142963B (en) * | 2018-06-05 | 2020-09-29 | 广西电网有限责任公司桂林供电局 | Interturn short circuit fault positioning system and method |
| CN110346685A (en) * | 2019-07-16 | 2019-10-18 | 杭州核诺瓦科技有限公司 | The device and method of large-size machine stator winding turn-to-turn state-detection |
| CN113433453A (en) * | 2021-05-20 | 2021-09-24 | 大唐信阳发电有限责任公司 | Generator rotor turn-to-turn short circuit diagnosis method based on RSO method |
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Application publication date: 20170524 |