CN106022965A - Method for establishing power generating vibrating area of hydroelectric generating set - Google Patents
Method for establishing power generating vibrating area of hydroelectric generating set Download PDFInfo
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- CN106022965A CN106022965A CN201610367618.0A CN201610367618A CN106022965A CN 106022965 A CN106022965 A CN 106022965A CN 201610367618 A CN201610367618 A CN 201610367618A CN 106022965 A CN106022965 A CN 106022965A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010835 comparative analysis Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 13
- 239000011159 matrix material Substances 0.000 claims description 9
- 241000239290 Araneae Species 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000012952 Resampling Methods 0.000 claims description 6
- 238000013112 stability test Methods 0.000 claims description 6
- 238000002592 echocardiography Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- DNHVXYDGZKWYNU-UHFFFAOYSA-N lead;hydrate Chemical compound O.[Pb] DNHVXYDGZKWYNU-UHFFFAOYSA-N 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- Hydraulic Turbines (AREA)
Abstract
The invention discloses an experiment method for establishing a power generating vibrating area of a hydroelectric generating set. The method comprises the following steps of acquiring original data of a stability experiment in a hydraulic power plant, performing analysis according to the original data, on different corresponding working conditions, respectively selecting vibration data which are measured by the hydroelectric generating set, performing continuous wavelet transformation for obtaining a wavelet coefficient graph, calculating a gray moment number which can represent vibration strength by means of definition of the gray moment; according to the gray moment value, drawing a trend graph of the gray moment on different working conditions with different loads, then calculating the gray moment value of the hydroelectric generating set in a good operation working condition, and determining the power generating vibrating area of the hydroelectric generating set through comparative analysis. The method is advantageous in that relatively high accuracy of the obtained vibration area range is realized; most important basis can be supplied for reasonably scheduling the load curve of each power generating enterprise by an electric power scheduling center; furthermore the gray moment of the good operation working condition of the hydroelectric generating set is used as a reference standard; higher rationality and higher accuracy are realized; and stable operation of the hydroelectric generating set is ensured.
Description
Technical field
The invention belongs to hydraulic power generation technology, especially relate to a kind of Hydropower Unit generating vibrating area method for building up.
Background technology
Along with greatly developing of China's hydropower, large-scale hydro-generating Unit gets more and more, and can Hydropower Unit safety and stability fortune
OK, stablizing of whole electrical network is directly influenced.The vibration problem of Hydropower Unit the most all receives much concern.In recent years, domestic
Outer had much by the excessive unit fault caused of unit vibration and accident.Although a lot of power stations all have begun to set machine
The vibrating area of group generating, evades unit and runs in vibrating area for a long time, but most of vibrating area scope is too big, and inaccuracy,
In electrical network Automatic Generation Control (AGC), vibrating area is very big on Hydropower Unit regulation impact, is unfavorable for having very much of dispatching of power netwoks
Merit power distributes.The present invention proposes a kind of new method setting up Hydropower Unit generating vibrating area, data based on scene test and
The theoretical method of wavelet analysis, it is possible to set up clear and definite vibrating area, solves safe and stable operation and the scheduling quickly distribution of unit
Contradiction between active power.
Summary of the invention
In order to solve the contradictory relation between unit safety stable operation and scheduling reasonable distribution load, the invention provides one and build
The method of vertical Hydropower Unit generating vibrating area.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of Hydropower Unit generating vibrating area method for building up, the invention is characterised in that, comprise the following steps:
The first step, do stability test in hydroelectric power plant, gather data: before doing stability test, measuring point to be arranged, it is respectively arranged
Upper spider, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and draft tube etc.；Under different operating conditions,
Carry out load change test, with data collecting instrument record test data；
Second step, the initial data obtained is carried out pretreatment and draws oscillogram: owing to the sampled point of test data measured is too many,
Inconvenient quickly calculating, needs resampling, and choosing sample frequency is 40HZ-50HZ, and sampling number is 1500 points, and point
Do not draw the upper spider under different operating mode, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and the runout ripple of draft tube
Shape figure；
3rd step, data to resampling obtained above carry out continuous wavelet transform: be first normalized the signal gathered
Processing, signal to be analyzed is formed { A by 1500 discrete points1,A2,...,A1500, obtain sequence after process for { x1,x2,...,x1500,
WhereinUnder MATLAB environment, carry out the continuous wavelet transform of 256 yardsticks, obtain 256 × 1500 small echos
Coefficient matrix B；
4th step, according to matrix of wavelet coefficients, calculate corresponding Gray Moment numerical value: calculate under different operating mode, the gray scale of different measuring points
Square numerical value；First above-mentioned matrix B is taken absolute value, according to formulaCalculate its Gray Moment value
Mk；
5th step, draw and analyze: drawing out under different operating mode respectively, the corresponding Gray Moment numerical value of different measuring points is with hydroelectric machine
The trendgram that group is exerted oneself；And choose the vibration data under unit operating condition steady in a long-term, according to above four steps, calculate
Gray Moment value M0, as reference standard, comparative analysis obtains the vibrating area of unit.
The present invention chooses discrimination preferable morl small echo and is analyzed；For Gray Moment Mk, take single order Gray Moment, calculate the time
Little and discrimination high.
The positive effect of the present invention is: the vibrating area scope obtained is more accurate, can be that power-management centre reasonable arrangement respectively generates electricity
Enterprise load curve provides most important foundation, and using the Gray Moment value of the good operation conditions of Hydropower Unit itself as reference
Standard, the most reasonable accurate, the stable operation for Hydropower Unit provides safeguard.
Accompanying drawing explanation
Fig. 1 is that the hydraulic turbine vibrates measuring point scattergram；In figure: 1. lead horizontal vibration on；2. upper spider horizontal vibration；3. upper spider hangs down
Straight vibration；Lead horizontal vibration down；5. lower bearing bracket horizontal vibration；6. lower bearing bracket vertical vibration；7. water leads horizontal vibration；8. water
Lead vertical vibration；9. top cover vertical vibration；10. top cover horizontal vibration；11. generator stator core horizontal vibrations；12. electromotors
Stator core vertical vibration；Throw is led on 13.；14. lower throws；15. lift machine amount；16. water lead throw；Pressure after 17. stators
Pulsation；18. draft tube inlet pressure pulsation；
Fig. 2 is the above vibrating area figure led and set up as a example by vibration.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is purged, is fully described by.
See Fig. 1, Fig. 2, a kind of Hydropower Unit generating vibrating area method for building up, the invention is characterised in that, comprise the following steps:
The first step, do stability test in hydroelectric power plant, gather data: before doing stability test, measuring point to be arranged, it is respectively arranged
Upper spider, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and draft tube etc.；Under different operating conditions,
Carry out load change test, with data collecting instrument record test data；
Second step, the initial data obtained is carried out pretreatment and draws oscillogram: owing to the sampled point of test data measured is too many,
Inconvenient quickly calculating, needs resampling, and choosing sample frequency is 40HZ-50HZ, and sampling number is 1500 points, and point
Do not draw the upper spider under different operating mode, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and the runout ripple of draft tube
Shape figure；
3rd step, data to resampling obtained above carry out continuous wavelet transform: be first normalized the signal gathered
Processing, signal to be analyzed is formed { A by 1500 discrete points1,A2,...,A1500, obtain sequence after process for { x1,x2,...,x1500,
WhereinUnder MATLAB environment, carry out the continuous wavelet transform of 256 yardsticks, obtain 256 × 1500 small echos
Coefficient matrix B；
4th step, according to matrix of wavelet coefficients, calculate corresponding Gray Moment numerical value: calculate under different operating mode, the gray scale of different measuring points
Square numerical value；First above-mentioned matrix B is taken absolute value, according to formulaCalculate its Gray Moment value
Mk；
5th step, draw and analyze: drawing out under different operating mode respectively, the corresponding Gray Moment numerical value of different measuring points is with hydroelectric machine
The trendgram that group is exerted oneself；And choose the vibration data under unit operating condition steady in a long-term, according to above four steps, calculate
Gray Moment value M0, as reference standard, comparative analysis obtains the vibrating area of unit.
The present invention chooses discrimination preferable morl small echo and is analyzed；For Gray Moment Mk, take single order Gray Moment, calculate the time
Little and discrimination high.
Claims (3)
1. a Hydropower Unit generating vibrating area method for building up, it is characterised in that comprise the following steps:
The first step, do stability test in hydroelectric power plant, gather data: before doing stability test, measuring point to be arranged, it is respectively arranged
Upper spider, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and draft tube etc.；Under different operating conditions,
Carry out load change test, with data collecting instrument record test data；
Second step, the initial data obtained is carried out pretreatment and draws oscillogram: owing to the sampled point of test data measured is too many,
Inconvenient quickly calculating, needs resampling, and choosing sample frequency is 40HZ-50HZ, and sampling number is 1500 points, and point
Do not draw the upper spider under different operating mode, on lead, lower bearing bracket, under lead, top cover, water are led, spiral case and the runout ripple of draft tube
Shape figure；
3rd step, data to resampling obtained above carry out continuous wavelet transform: be first normalized the signal gathered
Processing, signal to be analyzed is formed { A by 1500 discrete points1,A2,...,A1500, obtain sequence after process for { x1,x2,...,x1500,
WhereinUnder MATLAB environment, carry out the continuous wavelet transform of 256 yardsticks, obtain 256 × 1500 small echos
Coefficient matrix B；
4th step, according to matrix of wavelet coefficients, calculate corresponding Gray Moment numerical value: calculate under different operating mode, the gray scale of different measuring points
Square numerical value；First above-mentioned matrix B is taken absolute value, according to formulaCalculate its Gray Moment value
Mk；
5th step, draw and analyze: drawing out under different operating mode respectively, the corresponding Gray Moment numerical value of different measuring points is with hydroelectric machine
The trendgram that group is exerted oneself；And choose the vibration data under unit operating condition steady in a long-term, according to above four steps, calculate
Gray Moment value M0, as reference standard, comparative analysis obtains the vibrating area of unit.
Hydropower Unit vibrating area method for building up the most according to claim 1, it is characterised in that: due under different operating modes,
The Vibration Condition of unit is different, needs the efficiency test data obtaining under each operating mode, it is desirable to when carrying out load change test, often
Individual operating condition of test stable operation to be ensured 5 minutes, uses digital recorder continuous acquisition data more than 60 seconds after stablizing.
Hydropower Unit vibrating area method for building up the most according to claim 1, it is characterised in that: choose the preferable morl of discrimination
Small echo is analyzed；For Gray Moment Mk, take single order Gray Moment here, because the time of calculating is little and discrimination high.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610367618.0A CN106022965A (en) | 2016-05-30 | 2016-05-30 | Method for establishing power generating vibrating area of hydroelectric generating set |
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| CN201610367618.0A CN106022965A (en) | 2016-05-30 | 2016-05-30 | Method for establishing power generating vibrating area of hydroelectric generating set |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844680A (en) * | 2017-11-14 | 2018-03-27 | 国网湖南省电力有限公司 | A kind of Hydropower Unit synthesis oscillation area acquisition methods based on gradation of image superposition |
| CN114166444A (en) * | 2021-11-29 | 2022-03-11 | 国网新源控股有限公司 | Data processing method suitable for vibration analysis under transient working condition of hydropower station workshop |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104463435A (en) * | 2014-11-20 | 2015-03-25 | 云南电网公司电力科学研究院 | Online analysis and evaluation method for stable running areas of hydroelectric generating set |
-
2016
- 2016-05-30 CN CN201610367618.0A patent/CN106022965A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104463435A (en) * | 2014-11-20 | 2015-03-25 | 云南电网公司电力科学研究院 | Online analysis and evaluation method for stable running areas of hydroelectric generating set |
Non-Patent Citations (1)
| Title |
|---|
| 陈喜阳: "基于加窗的CWT 灰度矩提取水电机组非平稳征兆", 《水力发电学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844680A (en) * | 2017-11-14 | 2018-03-27 | 国网湖南省电力有限公司 | A kind of Hydropower Unit synthesis oscillation area acquisition methods based on gradation of image superposition |
| CN107844680B (en) * | 2017-11-14 | 2020-04-07 | 国网湖南省电力有限公司 | Hydroelectric generating set comprehensive vibration region acquisition method based on image gray level superposition |
| CN114166444A (en) * | 2021-11-29 | 2022-03-11 | 国网新源控股有限公司 | Data processing method suitable for vibration analysis under transient working condition of hydropower station workshop |
| CN114166444B (en) * | 2021-11-29 | 2024-06-21 | 国网新源控股有限公司 | Data processing method suitable for vibration analysis under transient working condition of hydropower house |
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