CN202140228U - Tail water and remaining pressure water supply and cooling system of water turbine generator set - Google Patents
Tail water and remaining pressure water supply and cooling system of water turbine generator set Download PDFInfo
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- CN202140228U CN202140228U CN201120190456U CN201120190456U CN202140228U CN 202140228 U CN202140228 U CN 202140228U CN 201120190456 U CN201120190456 U CN 201120190456U CN 201120190456 U CN201120190456 U CN 201120190456U CN 202140228 U CN202140228 U CN 202140228U
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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 utility model discloses a tail water and remaining pressure water supply and cooling system of a water turbine generator set. The tail water and remaining pressure water supply and cooling system comprises a plurality of large-sized water turbine generator sets and a unit cooling system, wherein the unit cooling system is used for supplying water to the plurality of large-sized water turbine generator sets, water intakes are arranged on steel penstocks of respective large-sized water turbine generator sets and are connected with small-sized water turbine generator sets through pipelines, and water outlet ends of the respective small-sized water turbine generator sets are communicated with the unit cooling system. In the utility model, water is supplied through the small-sized water turbine generator sets by using the tail water and the remaining pressure of the large-sized water turbine generator sets, and all remaining energy is converted into electric quantity through small water turbines; and as the water is supplied by using the tail water and the remaining pressure of the large-sized water turbine generator sets, energy can be saved, power consumption can be lowered, and reliability in operation is improved.
Description
Technical field
The utility model relates to hydraulic generator unit technical water supply system, refers to the jumbo hydraulic generator unit of the middle and high head section construction 600～700MW level of 150m～230m tail water overbottom pressure water supply cooling system particularly.
Background technique
In the water power plant, the more common way of supplying water of hydraulic generator unit technical water supply system has: modes such as water supply that water pump supplies water, the gravity flow decompression is supplied water and water-turbine top cover is fetched water.
In middle and high head section; The water pump water supply scheme is an economic benefit scheme relatively preferably, and still, water pump supplies water except that satisfying the intrinsic energy consumption of pipeline; Also to satisfy because the extra energy consumption of water pump, the low generation of motor self efficient; And water pump water supply scheme equipment is more, and operation maintenance is complicated, and the fault that regular meeting produces may cause compressor emergency shutdown and have a negative impact.
In recent years, be the reliability of the water system that develops skill, reduction valve replaces water pump to be widely used in the machine set technology water system.Some high-performance reduction valve have been successfully applied in the 120m head section large capacity hydroelectric generator group technical water supply system.But in the middle and high head section of 150m～230m, Pressure reducing ratio significantly improves, and receives cavitation and Effects of Noise, essential employing two-stage tandem decompression form, but the use of second depressurized valve, and with a large amount of consumption of water plant generator water abilities, operating cost is much higher with respect to water pump.Therefore from energy-conservation consideration, centering, high-head power station second depressurized valve technology water supply scheme should not use as main technical water supply scheme for a long time, use but can be used as interim alternative scheme.
The water-turbine top cover water intaking is meant that utilizing the press water that seals through the rotary wheel of water turbine crown to cool off as unit supplies water.Pressure between crown and the top cover changes along with pressure pulsation in tailwater level variation and the draft tube, and labyrinth ring water leakage, water turbine axial hydraulic thrust also change thereupon.If with top cover water intaking as unit cooling supply water, hydraulic pressure will increase the hydraulic loss of unit water-cooling tube part in the top cover, therefore, must adjust the water yield and hydraulic pressure whether meet the demands (also not having effective method at present).Because water-turbine top cover water intaking one side will satisfy technical water supply system flow and pressure requirement, can not artificially strengthen the operation burden of unit on the other hand, therefore, 600MW～700MW unit adopts the top cover water intaking to supply water need be careful.
Summary of the invention
The purpose of the utility model will overcome the existing in prior technology deficiency exactly; Provide the middle and high head section of a kind of 150m～230m to build 600～700MW level large capacity hydroelectric generator group tail water overbottom pressure water supply cooling system, solve that large-scale unit cooling technology water system energy consumption is big, the problem of operational reliability difference.
For realizing above-mentioned purpose; The hydraulic generator unit tail water overbottom pressure water supply cooling system that the utility model designed; Comprise several Large Hydroelectric Set and the unit cooling system that supplies water to several Large Hydroelectric Set; Be equipped with intake on the penstock of said each Large Hydroelectric Set, said intake all is connected with the small hydro turbine group through pipeline, and the waterexit end of said each small hydro turbine group is connected with the unit cooling system.
Preferably, said hydraulic generator unit also is provided with secondary gravity flow pressure reducing circuit.
For having comparativity, be example with the Goupitan engineering, power taking station weight average head 186m is a benchmark, and all energy consumption calculation are to the generator outlet end, and gravity flow decompression, water pump supply water, Large Hydroelectric Set tail water overbottom pressure water supply power consumption index sees the following form 1:
The water supply power consumption index of three kinds of way of supplying water of table 1
In the table:
η t: big water turbine average efficiency, get 0.92 η f: big generator average efficiency, get 0.98
η t1: Small turbine machine average efficiency, get 0.89 η f1: the small generators average efficiency, get 0.96
η p: the water pump average efficiency, get 0.7 η d: the motor average efficiency, get 0.80
η b: distribution loop losses such as unit transformer, get 0.99
Visible by table 1, gravity flow decompression water supply power consumption is maximum, and water pump supplies water and takes second place, and Large Hydroelectric Set tail water overbottom pressure supplies water minimum.
Through above-mentioned analysis relatively, in the large-scale hydroelectric power station of middle and high head section, Large Hydroelectric Set tail water overbottom pressure hydrotechny has remarkable advantages, and particularly power station installation platform number is more, arranges the crowded huge power station of underground power house.Therefore, according to the power station service condition, Application of Large hydraulic generator unit tail water overbottom pressure hydrotechny, energy-saving and cost-reducing, to improve aspect such as operational reliability significant.
The beneficial effect of the utility model is: utilize outside the water supply of Large Hydroelectric Set tail water overbottom pressure through the small hydro turbine group, all dump energies convert electric weight into through the Small turbine machine.Computational analysis; Centering, high head 600～700MW unit; After the hydraulic loss of deduction technical water supply system, power station residual water head and cooling water inflow can be installed the small hydro turbine group of 800kW-1200kW, for design Large Hydroelectric Set tail water overbottom pressure water supply scheme provides condition.Application of Large hydraulic generator unit tail water overbottom pressure supplies water, and can save energy and reduce the cost, improve operational reliability.
Description of drawings
Fig. 1 is the structural representation of a hydraulic generator unit tail water overbottom pressure water supply cooling system.
Fig. 2 is the structural representation of a plurality of hydraulic generator unit tail water overbottom pressure water supply cooling systems.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail.
Hydraulic generator unit tail water overbottom pressure water supply cooling system shown in Fig. 1; Comprise Large Hydroelectric Set 1 and the unit cooling system 2 that supplies water to several Large Hydroelectric Set 1; Be equipped with intake 1.2 on the penstock 1.1 of each Large Hydroelectric Set 1; Water intaking 1.2 all is connected with small hydro turbine group 3 through pipeline, and the waterexit end of each small hydro turbine group 3 is connected with unit cooling system 2.The waterexit end of unit cooling system 2 is connected with the draft tube 1.4 of Large Hydroelectric Set 1.
As shown in Figure 2: from water intaking 1.2 water intakings of the penstock 1.1 of 600MW Large Hydroelectric Set 1, through inlet valve 5 to small hydro turbine group 3, small hydro turbine group 3 through the generating decompression after, tail water is through valve 6 to unit cooling system 2.5 600MW Large Hydroelectric Set, the 1 required water supply cooling water in power station is all fetched water from unit cooling system 2.With the 4# unit is example, and current form the technical water supply major loop and technical water supply are provided for power station Large Hydroelectric Set 1 through valve 7, water filter 8, electric valve 9 and valve 10 to unit water main 12.Influence Large Hydroelectric Set 1 operation for preventing small hydro turbine group 3 because a variety of causes withdraws from, every Large Hydroelectric Set 1 is provided with secondary gravity flow pressure reducing circuit 4 as subsequent use.Spiral case 1.3 water intakings from Large Hydroelectric Set 1 through valve 7, water filter 8, electric valve 9, two reduction valve 11 and valve 10 to unit water main 12, form the technical water supply back-up circuit.
Generating (little unit) and power consumption (big unit cooling system) link becomes one through the pipeline series connection, under the prerequisite of guaranteeing big unit cooling system flow unchanged, and the power consumption substantially constant, surplus water can be then all by Small turbine machine trans-utilization.
Claims (2)
1. hydraulic generator unit tail water overbottom pressure water supply cooling system; Comprise several Large Hydroelectric Set (1) and water supply unit cooling system (2) to several Large Hydroelectric Set (1); It is characterized in that: be equipped with intake (1.2) on the penstock (1.1) of said each Large Hydroelectric Set (1); Said intake (1.2) all is connected with small hydro turbine group (3) through pipeline, and the waterexit end of said each small hydro turbine group (3) is connected with unit cooling system (2).
2. hydraulic generator unit tail water overbottom pressure water supply cooling system according to claim 1 is characterized in that: said hydraulic generator unit (1) also is provided with secondary gravity flow pressure reducing circuit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120190456U CN202140228U (en) | 2011-06-08 | 2011-06-08 | Tail water and remaining pressure water supply and cooling system of water turbine generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120190456U CN202140228U (en) | 2011-06-08 | 2011-06-08 | Tail water and remaining pressure water supply and cooling system of water turbine generator set |
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| Publication Number | Publication Date |
|---|---|
| CN202140228U true CN202140228U (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120190456U Expired - Lifetime CN202140228U (en) | 2011-06-08 | 2011-06-08 | Tail water and remaining pressure water supply and cooling system of water turbine generator set |
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| CN (1) | CN202140228U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244336A (en) * | 2013-05-21 | 2013-08-14 | 吴春根 | Hydropower station tail water power-generating water turbine |
| CN106968876A (en) * | 2017-05-19 | 2017-07-21 | 华能澜沧江水电股份有限公司糯扎渡水电厂 | A kind of turbine-generator units technical water supply control method |
| CN110528016A (en) * | 2019-09-30 | 2019-12-03 | 长江勘测规划设计研究有限责任公司 | Utilize the cooling water system top pressure power generation device for producing hydrogen in power station |
| CN112833619A (en) * | 2020-12-30 | 2021-05-25 | 天津天发总厂机电设备有限公司 | Hydroelectric set tail water residual pressure water supply cooling system |
-
2011
- 2011-06-08 CN CN201120190456U patent/CN202140228U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244336A (en) * | 2013-05-21 | 2013-08-14 | 吴春根 | Hydropower station tail water power-generating water turbine |
| CN103244336B (en) * | 2013-05-21 | 2016-03-09 | 吴春根 | A kind of hydropower station tail water water turbine |
| CN106968876A (en) * | 2017-05-19 | 2017-07-21 | 华能澜沧江水电股份有限公司糯扎渡水电厂 | A kind of turbine-generator units technical water supply control method |
| CN106968876B (en) * | 2017-05-19 | 2019-01-04 | 华能澜沧江水电股份有限公司糯扎渡水电厂 | A kind of turbine-generator units technical water supply control method |
| CN110528016A (en) * | 2019-09-30 | 2019-12-03 | 长江勘测规划设计研究有限责任公司 | Utilize the cooling water system top pressure power generation device for producing hydrogen in power station |
| CN110528016B (en) * | 2019-09-30 | 2024-04-16 | 长江勘测规划设计研究有限责任公司 | Device for generating electricity and producing hydrogen by utilizing residual pressure of hydropower station cooling water supply system |
| CN112833619A (en) * | 2020-12-30 | 2021-05-25 | 天津天发总厂机电设备有限公司 | Hydroelectric set tail water residual pressure water supply cooling system |
| CN112833619B (en) * | 2020-12-30 | 2022-07-29 | 天津天发总厂机电设备有限公司 | Hydroelectric set tail water residual pressure water supply cooling system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120208 |
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| CX01 | Expiry of patent term |