CN108534740A - A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing - Google Patents
A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing Download PDFInfo
- Publication number
- CN108534740A CN108534740A CN201810156120.9A CN201810156120A CN108534740A CN 108534740 A CN108534740 A CN 108534740A CN 201810156120 A CN201810156120 A CN 201810156120A CN 108534740 A CN108534740 A CN 108534740A
- Authority
- CN
- China
- Prior art keywords
- air gap
- stator
- value
- thermal expansion
- monitoring
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention belongs to hydroelectric generating set monitoring technical field, more particularly to a kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing includes the following steps：Step 1, on stator inner wall top, either 4 or 8 air gap sensors are installed in lower part（Flat capacitance sensor）；Step 2, data acquisition and calculating acquire by air gap sensors and obtain the air gap value of each sensor in unit running process, and determine that unit cold conditions plays machine and reaches the air gap value after stable state；Step 3 obtains current air gap value in real time, with the air gap value after stabilization be calculated stator thermally expand to, sub-state is analyzed according to stator thermal expansion value, pass through the monitoring to generator stator-rotator air gap, stator thermal expansion value is dynamically measured according to the variation of air gap, this method can dynamically measure stator thermal expansion value, and foundation is provided for evaluation sub-state.
Description
Technical field
The invention belongs to hydroelectric generating set monitoring technical field, more particularly to a kind of turbine-generator units stator thermal expansion dynamic
Method for monitoring and analyzing.
Background technology
As turbine-generator units single machine installed capacity increases, the accounting of water power in the entire power system is increasing,
To its operational reliability, higher requirements are also raised for electric system, needs to ensure the safe and reliable of unit operation thus, drop simultaneously
Low equipment maintenance cost improves unit operation efficiency.Carry out at present and on-line monitoring and fault diagnosis are carried out to turbine-generator units
Have become one of electric system production and scientific research department's research hotspot.Using high-performance computer to the real-time status of unit into
Row on-line monitoring, can understand operating parameter, the current working state of unit, find accident potential in time, and can carry out in time
Alert detecting and emergency review more instantaneously can preserve a large amount of exception informations at a high speed, be convenient for crash analysis.So research water
The fault diagnosis technology of turbine generator group carries out intelligent diagnostics to the vibration fault of unit based on the relevant technologies, helps to improve
China's Fault Diagnosis of Hydroelectric Generating Set is horizontal, and the gap of diminution and external similar technique all has a very important significance.
Gap structure is the important construction in high-rating generator, width, the deformation in air gap or the change of temperature of air gap
Change all can cause to seriously affect to the performance of generator.
For example, hydrogenerator is the equipment that can convert water to electric energy, generator includes stator and rotor.Stator core
Positioning bar mostly uses greatly muscle structure living when design, has often reserved stator core expansion space, allows stator core in certain journey
Thermal expansion in degree, stator, which thermally expands, abnormal for example thermally expands that uneven or expansion is excessive is typically due to positioning bar dovetail and iron core
Hair fastener or iron core temperature rise it is excessively high cause, stator core thermally expands exception for a long time, can lead to film aging between iron-core lamination, and it is fixed to reduce
In the sub- iron core service life, iron-core lamination can be caused to protrude when serious, cut bar, eventually lead to the major accidents such as stator grounding, stator
The major significance that iron core thermally expands monitoring is to judge stator core internal electric or mechanical breakdown in advance, be provided for stator maintenance
Guidance.Also it is a technological difficulties to the dynamic monitoring that stator core thermally expands at present.
In conclusion development China's Hydroelectric Generating Set State Monitoring and fault diagnosis technology, study the intelligence of unit failure
Energy diagnostic techniques discloses influence and harm that stator core thermally expands, is finally reached and comments the predictive maintenance offer of unit failure
Valence foundation is the urgent task put in face of those skilled in the art.
Invention content
And, it is fixed that the present invention provides a kind of turbine-generator units in view of the above-mentioned defects in the prior art
Sub- thermal expansion dynamic method for monitoring and analyzing is dynamically surveyed by the monitoring to generator stator-rotator air gap according to the variation of air gap
Stator thermal expansion value is measured, foundation is provided for evaluation sub-state.
The technical solution adopted by the present invention to solve the technical problems is：A kind of turbine-generator units stator thermal expansion dynamic
Method for monitoring and analyzing includes the following steps：
Step 1, on stator inner wall top, either 4 or 8 air gap sensors are installed in lower part（Flat capacitance sensor）；
Step 2, data acquisition and calculating, in unit running process, are acquired by air gap sensors and obtain each sensor
Air gap value, and determine that unit cold conditions plays machine and reaches the air gap value after stable state；
Step 3 obtains current air gap value in real time, and stator thermal expansion value is calculated with the air gap value after stabilization, according to stator heat
Swell value analyzes sub-state.
A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing of the present invention, wherein air gap passes in step 1
Sensor
It is uniformly distributed along stator circumference direction.
A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing of the present invention, wherein stator heat in step 3
The computational methods of swell value are：Air gap value after stator thermal expansion value=current air gap value-stable state.
The beneficial effects of the invention are as follows：The prior art is compared, a kind of turbine-generator units stator of the invention thermally expands dynamic
It is swollen dynamically to measure stator heat by the monitoring to generator stator-rotator air gap according to the variation of air gap for state method for monitoring and analyzing
Swollen value, this method can dynamically measure stator thermal expansion value, and foundation is provided for evaluation sub-state.
Description of the drawings
Fig. 1 is generator cross section structure schematic diagram in the embodiment of the present invention.
Fig. 2 is that vibrating sensor of the embodiment of the present invention monitors to obtain air-gap data line chart.
Specific implementation mode
Elaborate below in conjunction with the accompanying drawings to the specific implementation mode of the present invention, the advantages of the present invention is furture elucidated and
Relative to
The outstanding contributions of the prior art, it is possible to understand that, following embodiments is only to the detailed of preferred embodiment of the present invention
Illustrate, should not be construed as any restrictions to technical solution of the present invention.Under the premise of not departing from design concept of the present invention, this
The all variations and modifications that field ordinary person makes technical scheme of the present invention should all drop into the protection model of the present invention
It encloses, the claimed technology contents of the present invention, has all recorded in detail in the claims.
A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing as shown in Figs. 1-2, includes the following steps：
Step 1, in stator（2）4 air gap sensors are installed in upper inside wall or lower part（3）（Flat capacitance sensor）；
Step 2, data acquisition and calculating, in unit running process, pass through air gap sensors（3）It acquires and obtains each sensing
The air gap value of device, and determine that unit cold conditions plays machine and reaches the air gap value after stable state；
Step 3 obtains current air gap value in real time, and stator is calculated with the air gap value after stabilization（2）Thermal expansion value, according to stator
（2）Thermal expansion value analyzes stator（2）State.
Wherein, air gap sensors in step 1（3）Along stator（2）Circumferencial direction is uniformly distributed.
Wherein, in step 3, unit from cold conditions machine reach stable state after, rotor（1）Around main shaft（4）The state of rotation
It tends towards stability, the hereafter variation of air gap is due to stator（2）Caused by thermal expansion, reach stable shape by analyzing unit cold conditions machine
Air gap variation after state, can calculate stator（2）Swell value during thermostabilization；
Stator（2）The computational methods of thermal expansion value are：Air gap value after stator thermal expansion value=current air gap value-stable state.
Claims (3)
1. a kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing, it is characterised in that：Include the following steps：
Step 1, on stator inner wall top, either 4 or 8 air gap sensors are installed in lower part（Flat capacitance sensor）；
Step 2, data acquisition and calculating, in unit running process, are acquired by air gap sensors and obtain each sensor
Air gap value, and determine that unit cold conditions plays machine and reaches the air gap value after stable state；
Step 3 obtains current air gap value in real time, and stator thermal expansion value is calculated with the air gap value after stabilization, according to stator heat
Swell value analyzes sub-state.
2. a kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing according to claim 1, feature exist
In：The step（1）Middle air gap sensors are uniformly distributed along stator circumference direction.
3. a kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing according to claim 1, feature exist
In：Step（3）The computational methods of middle stator thermal expansion value are：Air gap after stator thermal expansion value=current air gap value-stable state
Value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156120.9A CN108534740A (en) | 2018-02-24 | 2018-02-24 | A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156120.9A CN108534740A (en) | 2018-02-24 | 2018-02-24 | A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108534740A true CN108534740A (en) | 2018-09-14 |
Family
ID=63485773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156120.9A Pending CN108534740A (en) | 2018-02-24 | 2018-02-24 | A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108534740A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375684A (en) * | 2019-08-21 | 2019-10-25 | 华能四川水电有限公司 | A kind of hydroturbine rotor non-roundness measurement method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006734A (en) * | 2014-06-10 | 2014-08-27 | 中国长江三峡集团公司 | On-line measuring device and method for hydro generator stator and rotor dynamic air gap |
| CN106709156A (en) * | 2016-11-30 | 2017-05-24 | 国网福建省电力有限公司 | Automatic evaluation method for thermal deformation of water-turbine generator set stator based on online data |
-
2018
- 2018-02-24 CN CN201810156120.9A patent/CN108534740A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006734A (en) * | 2014-06-10 | 2014-08-27 | 中国长江三峡集团公司 | On-line measuring device and method for hydro generator stator and rotor dynamic air gap |
| CN106709156A (en) * | 2016-11-30 | 2017-05-24 | 国网福建省电力有限公司 | Automatic evaluation method for thermal deformation of water-turbine generator set stator based on online data |
Non-Patent Citations (1)
| Title |
|---|
| 朱玉良: "发电机空气间隙在线监测技术在三峡右岸电站的应用", 《中国水力发电工程学会电力系统自动化专委会2009年年会暨学术交流会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375684A (en) * | 2019-08-21 | 2019-10-25 | 华能四川水电有限公司 | A kind of hydroturbine rotor non-roundness measurement method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102434388B (en) | Health status online monitoring device of wind generating set and monitoring method of monitoring device | |
| CN108412660A (en) | A method of passing through analysis of orbit turbine-generator units bearing shell state | |
| CN105137233B (en) | A kind of main fan for mines potential safety hazard monitoring and pre-warning system and method | |
| CN203405562U (en) | Excitation-loss fault diagnosis system for electric automobile permanent magnet synchronous motor | |
| CN106990357A (en) | Intelligent electric machine integrated form multi-parameter fusion Gernral Check-up and early warning system | |
| CN206710565U (en) | Intelligent electric machine integrated form multi-parameter fusion Gernral Check-up and early warning system | |
| WO2021063294A1 (en) | Rotor center offset detection method and apparatus, storage medium, and device | |
| CN104155567B (en) | Positioning method of turn-to-turn short circuit fault of doubly-fed generator rotor | |
| CN109297716A (en) | A kind of double feed wind power generator vibrating failure diagnosis method | |
| CN105891660A (en) | Method for detecting turn-to-turn short circuit fault of stator winding of generator | |
| CN114236416B (en) | Battery pack health condition monitoring device | |
| CN115235327A (en) | Multifunctional dynamic and static air gap measuring and calculating method for hydraulic generator | |
| CN108534740A (en) | A kind of turbine-generator units stator thermal expansion dynamic method for monitoring and analyzing | |
| CN110632512B (en) | Induction motor monitoring method and device based on magnetic flux leakage and vibration signals | |
| CN108429406A (en) | A method of analysis stator core abnormal vibrations are monitored by air gap | |
| CN107202956A (en) | A kind of fault diagnosis for frequency conversion drives method based on m-Acetyl chlorophosphonazo feature | |
| JP6801144B2 (en) | Diagnostic device and diagnostic method | |
| CN106772039A (en) | Turn-to-turn short circuit of rotor winding of automobile turbine generator diagnostic method based on core through screw rod | |
| CN106771820B (en) | Method for monitoring short circuit fault of stator core and feed-through screw of synchronous generator | |
| CN106523297A (en) | Monitoring device of energy-saving wind generating set | |
| CN204177367U (en) | Wind power generating set, its bearing displacement monitoring of structures and system | |
| CN214698150U (en) | Hydroelectric set state monitoring and fault diagnosis system | |
| Jiang et al. | Theoretical and experimental study on wind wheel unbalance for a wind turbine | |
| CN215217488U (en) | Multi-dimensional steam turbine expansion on-line monitoring system | |
| CN113740764A (en) | On-line detection method and device for turn-to-turn short circuit defect of generator rotor winding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |
|
| RJ01 | Rejection of invention patent application after publication |