CN101126233A - Complex impedance type hydraulic power plant surge-chamber structure - Google Patents
Complex impedance type hydraulic power plant surge-chamber structure Download PDFInfo
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- CN101126233A CN101126233A CNA2007100549894A CN200710054989A CN101126233A CN 101126233 A CN101126233 A CN 101126233A CN A2007100549894 A CNA2007100549894 A CN A2007100549894A CN 200710054989 A CN200710054989 A CN 200710054989A CN 101126233 A CN101126233 A CN 101126233A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000009795 derivation Methods 0.000 claims description 14
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention relates to a complex impedance type voltage-regulation room structure for the hydraulic power station, which comprises a shaft (4) and a diversion conduit (3) that is communicated with the shaft and is characterized in that at least two impedances (1) are arranged in the shaft (4) and below the water level (5). Also a connecting pipe (2) can be arranged between the shaft (4) and the diversion conduit (3) and at least two impedances (1) are arranged in the connection pipe (2). The invention has the advantages that the structure can fully reflect the surge wave, decrease the maximum surge, increase the minimum surge, save the investment of the project and improve the operation conditions when the load of the generator set changes.
Description
(1) technical field
The present invention relates to the Transient Process of Hydropower Station technical field, be specially the surge-chamber structure in the diversion and power system of power station.
(2) background technology
In order to improve water hammer, the joining place of pressing derivation conduit and pressure pipeline that has in the power station of being everlasting is built surge-chamber.Section that the surge-chamber utilization enlarges and table reflection surge wave, will have the diversion system of pressure to be divided into two sections: Upstream section is for there being the pressure diversion tunnel, and surge-chamber makes tunnel avoid the influence of surge pressure basically; Tract is a pressure pipeline, because contraction in length, thereby reduced the water attack value in the pressure pipeline, improved the service condition of unit.The function of surge-chamber can reduce following 3 points: 1, reflection surge wave.Basically avoid the surge wave in (or reducing) pressure pipeline to enter the pressure derivation conduit.2, shorten pressure pipeline length.Thereby reduce the surge pressure in pressure pipeline and the factory building overcurrent part.3, improve the service condition of unit when load variations and the power supply quality of system.
Can trace back to the early stage scholar Lei Man (Rateau) in Europe, cover and step on the contribution that theoretical foundation is made to surge-chamber such as (Gaden), Fu Lanke (Frandk) the research of surge-chamber, wherein Johnson (Johnoson) has invented differential surge chamber.
The surge-chamber structure pattern of using has simple-type, impedance type, hydroecium formula, overflow-type, differential type and air-cushion type at present, or by these several hybrid surge-chambers that combine.
Throttled surge chamber is to adopt more a kind of surge-chamber pattern, because the existence of bottom additional impedance is compared with simple-type, the water fluctuation amplitude is little in the surge-chamber, and decay is fast, and head loss is little, but relatively poor to the water attack wave reflection when normally moving.
The size in throttled surge chamber impedance hole is advisable fully reflecting surge wave in principle, otherwise can not be fully reflected surge wave, makes diversion tunnel be subjected to the influence of water attack.But there is such problem usually: on the one hand, in order fully to reflect surge wave, what the impedance hole need be provided with is bigger, but this makes that the water level lift-off value in the surge-chamber is bigger, causing has the internal water pressure design load of pressing derivation conduit and pressure pipeline to increase, thereby has increased construction investment; On the other hand, in order to reduce top surge, reducing has the internal water pressure design load of pressing derivation conduit and pressure pipeline, saves construction investment, then need with the impedance hole be provided with smaller, but this makes surge-chamber can not fully reflect surge wave again.
If surge-chamber can reduce the water-level fluctuation amplitude again effectively when fully reflecting surge wave, then such surge-chamber will be very good.
(3) technology contents
In view of the deficiency that existing throttled surge chamber exists, the object of the present invention is to provide and a kind ofly can fully reflect surge wave, can effectively reduce the hydraulic power plant surge-chamber structure of water-level fluctuation amplitude in the surge-chamber again.
To achieve these goals, the present invention is according to following technical scheme.This surge-chamber structure is to be provided with tube connector on derivation conduit, and tube connector is provided with pit shaft, is provided with two impedances in tube connector at least.
Further structure of the present invention is to be provided with tube connector on derivation conduit, and tube connector is provided with pit shaft, is provided with overflow weir in upper wellbore, is provided with two impedances in the tube connector at least.
Another structure of the present invention is to be provided with pit shaft on derivation conduit, and establishes the chamber and be connected with pit shaft with following chamber, is provided with two impedances in pit shaft at least.
An also structure of the present invention is to be provided with two impedances in pit shaft at least.
Superior part of the present invention is:
1, can fully reflect surge wave.By size, number and the elevation that the impedance hole reasonably is set, surge wave is fully reflected at the surge-chamber place.
2, save construction investment.The imperial palace hydraulic pressure design load of diversion tunnel and pressure pipeline is controlled by top surge, and this point is the total characteristics of all big flows, long diversion tunnel basically.
Enough low top surge water level can fall in the surge-chamber of this kind structural shape, raise the minimum water level of surging, reduce the imperial palace hydraulic pressure design load of diversion tunnel and pressure pipeline, thereby saved the construction investment of diversion tunnel and pressure pipeline, if add because the surge-chamber that is reduced of raising of the reduction of the interior peak level of surge-chamber and lowest water level excavates and the lining project amount, the investment of saving will be more considerable.
Service condition when 3, improving the unit load variation.Can effectively reduce the water-level fluctuation amplitude in the surge-chamber, make water fluctuation decay fast and tend towards stability, abandoning under the situation of sub-load, avoided that unit is long-time at water level, regulated repeatedly under the situation about fluctuating widely, thereby improved the service condition of unit when load changes.
(4) description of drawings
Fig. 1 is provided with the throttled surge chamber structural representation of complex impedance for the present invention.
Fig. 2 is provided with the spilling surge chamber structural representation of complex impedance for the present invention.
Fig. 3 is provided with the hydroecium formula surge-chamber structure schematic diagram of complex impedance for the present invention.
Fig. 4 is provided with the simple-type surge-chamber structure schematic diagram of complex impedance for the present invention.
1 is impedance among the figure, the 2nd, and tube connector, the 3rd, derivation conduit, 4 pit shafts, the 5th, water level, the 6th, overflow weir, the 7th, following chamber, the 8th, last chamber.
(5) specific embodiment
Concrete structure of the present invention sees also accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4, can take wherein a kind of structural shape according to actual requirement of engineering.
Fig. 1 is the throttled surge chamber that is provided with complex impedance, is being provided with tube connector 2 on 3 on the derivation conduit, and tube connector 2 is provided with pit shaft 4, is provided with two impedances 1 in tube connector 2 at least.
Fig. 2 is the spilling surge chamber that is provided with complex impedance, is provided with tube connector 2 on derivation conduit 3, and tube connector 2 is provided with pit shaft 4, is provided with overflow weir 6 on the top of pit shaft 4, is provided with two impedances 1 in the tube connector 2 at least.
Fig. 3 is the hydroecium formula surge-chamber that is provided with complex impedance, is provided with pit shaft 4 on derivation conduit 3, and sets chamber 7 and be connected with pit shaft 4 with last chamber 8, in pit shaft 4, water level is provided with two impedances 1 at least below 5.
Fig. 4 is the simple-type surge-chamber that is provided with impedance, is provided with pit shaft 4 on derivation conduit 3, in pit shaft 4, water level is provided with two impedances 1 at least below 5.
The characteristics of simple-type surge-chamber are to have identical section from top to bottom, structural shape is simple, the reflection surge wave is effective, but the junction head loss of tunnel and surge-chamber is bigger when normal operation, the amplitude of tunnel and surge-chamber middle water level fluctuation is bigger when changes in flow rate, it is slower to decay, and the volume of required surge-chamber is bigger, generally is used for the power station of low water head or low discharge more.
With the bottom of simple-type surge-chamber, couple together with the less short tube of section or aperture and tunnel and pressure pipeline, be throttled surge chamber.Because the current of turnover surge-chamber have consumed part energy at place, impedance aperture, so the water-level fluctuation amplitude has reduced, decay is accelerated, and required surge-chamber volume is less than simple-type, and the water level loss is less when normally moving.But because the existence of impedance, surge wave can not reflect fully, may be subjected to the influence of water attack in the tunnel, must select suitable impedance during design.
Overflow weir is arranged at the spilling surge chamber top.When abandoning when load, water level begins rapid rising, begins overflow after reaching overflow weir, has limited further raising of water level, helps the stable operation of unit, and the water yield of overflowing can be stored the chamber of establishing, and also can drain into the downstream.
Hydroecium formula surge-chamber by the less vertical shaft of section and up and down the reservoir chamber that enlarges of two sections form.When abandoning load, the water level in the vertical shaft rises rapidly, in case enter the bigger last chamber of section, speed long on the water level is just slowly got off immediately; When increasing load, water level is dropped rapidly to down the chamber, and replenishes the not enough water yield by following chamber, thereby limited the decline of water level, so same energy can be stored among the less volume, so the volume ratio of this surge-chamber is less, be applicable to the higher and bigger power station of reservoir drawdown of head.
By calculating and design, size, number and the elevation of complex impedance reasonably is set, can satisfy fully reflection surge wave and the requirement that reduces water level rising value in the surge-chamber effectively preferably.
Its principle is as follows: when water attack takes place when, and section that the surge-chamber utilization enlarges and table reflection surge wave.For the surge-chamber that has impedance, the abundant degree of water attack wave reflection is subjected to the influence of impedance hole size and resistance value size, the impedance bore dia is big more, resistance value is more little, and is abundant more to the water attack wave reflection.Studies show that: the size of impedance hole area is bigger to the degree of reflection influence of surge wave; The size of resistance value is less and comparatively remarkable to the influence of surging to the degree of reflection influence of surge wave.Therefore, if can improve the resistance value in aperture when not dwindling the impedance orifice area, then will significantly improve the hydraulic performance of surge-chamber, it can fully reflect surge wave on the one hand, then can effectively reduce the amplitude of surging on the other hand.Then can be implemented in this purpose that improves the aperture resistance value when not dwindling the impedance orifice area by the method that increases the impedance number, therefore, by size, number and the elevation that reasonably designs the impedance aperture, on the one hand, can keep certain impedance hole area, with abundant reflection surge wave, on the other hand, improve the aperture resistance value again, can reduce the amplitude of surging effectively.
By a plurality of impedances are set, the hydraulic performance of impedance type, overflow-type, hydroecium formula, simple-type surge-chamber is significantly improved, compare with original impedance type, overflow-type, hydroecium formula, simple-type surge-chamber, in big flow, long diversion tunnel system, tangible technology and economic advantages are arranged.
With ample this first power station on ample this first river of Dadu River Xi Yuan is example, this Power Plant Design installation 3 * 110MW, and reservoir normal pool level 2788m, level of dead water 2784m, the long 19662m in pressure diversion road, diameter 8.5m, flow 201m is quoted in design
3/ s, surge shaft diameter 20m, impedance bore dia 4.5m, guide vanes of water turbine shut-in time 15s.
According to " hydraulic power plant surge-chamber design specifications " (DL/T5058-1996), simple impedance type and complex impedance type surge-chamber are calculated as follows.If adopt simple impedance type surge shaft, design top surge 2840.36m designs the minimum 2746.55m that surges, maximum water attack rising value 33.25m.If adopt the complex impedance type surge shaft, design top surge 2831.02m designs the minimum 2750.35m that surges, maximum water attack rising value 33.29m.
Can find out from above result of calculation:
(1) the complex impedance type surge-chamber can fully reflect surge wave.The complex impedance type surge-chamber is compared with simple throttled surge chamber, and the maximum surge pressure rising value only increases 0.04m, so the complex impedance type surge-chamber can fully reflect surge wave.
(2) can reduce top surge, raise minimum surging, save construction investment.From top result of calculation as can be seen, with throttled surge chamber, the complex impedance type surge-chamber can reduce top surge 9.34m, raises the minimum 9.99m of surging.In conjunction with this Power Plant Design, will reduce cubic meter of stone well and dig 7900m
3, reduce concrete lining 2100m
3,, only will save 2,440,000 yuan of construction investments for these two according to the investment estimate in this power station.If add because the upstream that the reduction of top surge causes has the internal water pressure design load of pressure derivation conduit and pressure pipeline to reduce the construction investment of being saved, the construction investment of its saving will be more considerable.
Service condition when (3) improving the unit load variation.With three machine oeprations at full load, wherein a full load rejection is an example, the complex impedance type surge-chamber is compared with simple throttled surge chamber, reduce the first amplitude 1.68m, reduce the second amplitude 1.62m, effectively reduced the water-level fluctuation amplitude in the surge-chamber, make water fluctuation decay at faster speed and tend towards stability, improved the service condition of unit when load changes.
Claims (4)
1. complex impedance type hydraulic power plant surge-chamber structure has the throttled surge chamber structure, promptly comprises pit shaft (4) and the derivation conduit (3) that communicates with it, it is characterized in that being provided with at least in pit shaft (4), below the water level (5) two impedances (1).
2. complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 1 is characterized in that on pit shaft (4) inwall, is provided with the last chamber (8) and following chamber (7) that are connected with pit shaft (4), and is being provided with two impedances (1) on the inwall, below the water level (5) at least.
3. complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 1 is characterized in that between pit shaft (4) and aqueduct (3) tube connector (2) being set, and it is provided with two impedances (1) at least in tube connector (2).
4. complex impedance type hydraulic power plant surge-chamber structure as claimed in claim 3 is characterized in that being provided with overflow weir (6) on pit shaft (4) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100549894A CN101126233B (en) | 2007-08-17 | 2007-08-17 | Complex impedance type hydraulic power plant surge-chamber structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100549894A CN101126233B (en) | 2007-08-17 | 2007-08-17 | Complex impedance type hydraulic power plant surge-chamber structure |
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| CN101126233A true CN101126233A (en) | 2008-02-20 |
| CN101126233B CN101126233B (en) | 2010-07-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644261A (en) * | 2012-05-02 | 2012-08-22 | 黄河勘测规划设计有限公司 | Surge shaft construction method combining impedance with overflow |
| CN103938595A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Method for converting non-pressure water delivery into pressure water delivery in middle-small sized hydropower station plant |
| CN104110016A (en) * | 2014-06-18 | 2014-10-22 | 华北水利水电大学 | Piston energy-dissipation-type pressure balance chamber |
| CN104234019A (en) * | 2014-09-30 | 2014-12-24 | 武汉大学 | Cross-section-variable pressure regulating chamber |
| CN104929087A (en) * | 2015-06-22 | 2015-09-23 | 西华大学 | Damping impedance type pressure regulating device |
| CN112627129A (en) * | 2020-12-31 | 2021-04-09 | 河南省水利第二工程局 | Pressure regulating chamber device for hydropower station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1724797A1 (en) * | 1989-04-14 | 1992-04-07 | Грузинский научно-исследовательский институт энергетики и гидротехнических сооружений | Shaft spillway |
| CN100458021C (en) * | 2006-06-29 | 2009-02-04 | 中国水电顾问集团成都勘测设计研究院 | Cover type air cushion type pressure balance chamber |
| CN201099853Y (en) * | 2007-08-17 | 2008-08-13 | 吴昊 | Complex impedance type hydraulic power plant surge-chamber structure |
-
2007
- 2007-08-17 CN CN2007100549894A patent/CN101126233B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644261A (en) * | 2012-05-02 | 2012-08-22 | 黄河勘测规划设计有限公司 | Surge shaft construction method combining impedance with overflow |
| CN102644261B (en) * | 2012-05-02 | 2014-10-22 | 黄河勘测规划设计有限公司 | Surge shaft construction method combining impedance with overflow |
| CN103938595A (en) * | 2014-04-03 | 2014-07-23 | 昆明理工大学 | Method for converting non-pressure water delivery into pressure water delivery in middle-small sized hydropower station plant |
| CN104110016A (en) * | 2014-06-18 | 2014-10-22 | 华北水利水电大学 | Piston energy-dissipation-type pressure balance chamber |
| CN104110016B (en) * | 2014-06-18 | 2016-02-24 | 华北水利水电大学 | Piston energy dissipation type surge-chamber |
| CN104234019A (en) * | 2014-09-30 | 2014-12-24 | 武汉大学 | Cross-section-variable pressure regulating chamber |
| CN104929087A (en) * | 2015-06-22 | 2015-09-23 | 西华大学 | Damping impedance type pressure regulating device |
| CN112627129A (en) * | 2020-12-31 | 2021-04-09 | 河南省水利第二工程局 | Pressure regulating chamber device for hydropower station |
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| Publication number | Publication date |
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| CN101126233B (en) | 2010-07-21 |
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Owner name: DEVELOPING MARKET STRATEGY RESEARCH OF YELLOW RIVE Free format text: FORMER OWNER: WU HAO Effective date: 20100521 |
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Effective date of registration: 20100521 Address after: 450003 Zhengzhou Jinshui Road, Henan, No. 109 Applicant after: Yellow River Engineering Consulting Co., Ltd. Address before: 450003 Zhengzhou Jinshui Road, Henan, No. 109 Applicant before: Wu Hao |
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Address after: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee after: Yellow River Survey Planning and Design Research Institute Co., Ltd. Address before: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee before: Yellow River Engineering Consulting Co., Ltd. |