CN220620015U - Cascade series diversion type power station adopting water turbine - Google Patents
Cascade series diversion type power station adopting water turbine Download PDFInfo
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- CN220620015U CN220620015U CN202322182845.4U CN202322182845U CN220620015U CN 220620015 U CN220620015 U CN 220620015U CN 202322182845 U CN202322182845 U CN 202322182845U CN 220620015 U CN220620015 U CN 220620015U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 239
- 238000010248 power generation Methods 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 66
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 abstract description 11
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 238000012876 topography Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
Abstract
The utility model discloses a cascade serial diversion type power station adopting a water bucket type water turbine, and belongs to the technical field of design and construction of hydraulic and hydroelectric engineering structures. The cascade serial diversion type power station adopting the water turbine can effectively utilize the height difference between the normal operation water level and the upper limit water level of the accident working condition, reduce the excavation height and reduce the energy dissipation requirement. The cascade serial diversion type power station at least comprises an upper-stage diversion power generation system and an adjacent lower-stage water storage regulation reservoir, wherein the tail water output end of the upper-stage diversion power generation system is connected with the adjacent lower-stage water storage regulation reservoir, the cascade serial diversion type power station also comprises an emergency water level regulation system, each stage of water storage regulation reservoir is respectively and independently connected with the emergency water level regulation system, and the installation height of a bucket water turbine of the upper-stage diversion power generation system is not lower than the highest water level of the adjacent lower-stage water storage regulation reservoir when the corresponding part of the emergency water level regulation system is at the maximum water level.
Description
Technical Field
The utility model relates to a cascade serial diversion type power station, in particular to a cascade serial diversion type power station adopting a water bucket turbine, and belongs to the technical field of design and construction of hydraulic and hydroelectric engineering structures.
Background
For a power station developed by adopting diversion type, if the water flow fall is too large and limited by the design and manufacture of a turbine set and a pressure pipeline, a multistage series connection mode is required, and the turbine needs a bucket turbine. In order to reduce the mutual influence in the operation process of the upper and lower power stations and reserve enough response time in emergency, an adjusting tank is generally arranged between the upper and lower water diversion power stations to connect the tail water outlet of the upper power station with the water inlet of the lower power station, so that the operation stability and safety of the whole system are improved.
In the conventional design, when the power station is stably operated, the flow of tail water of the upper-stage power station entering the regulating tank is equal to the reference flow of a water inlet of the lower-stage power station, and the water level of the regulating tank is unchanged. When the emergency stop of the previous-stage power station occurs, the next-stage power station still can continuously run for a period of time, the regulating tank enters a water supply working condition, and the water level in the tank is reduced. After the emergency stop of the next-stage power station, the last-stage power station continuously operates, tail water continuously enters the regulating tank, the regulating tank enters a water storage working condition, and the water level in the tank rises. The design of the regulating tank needs to meet the water level and storage capacity requirements of two accident working conditions.
When the water head of the diversion type power station is too high, a water bucket type water turbine is needed, and the water turbine is needed to be installed above the free water surface and a certain safety distance is reserved. However, under the normal running condition, the downstream tail water level is at a normal water level and is at a certain distance from the upper limit water level of the accident condition, and the water turbine must be installed above the upper limit water level of the accident condition and cannot utilize the height difference between the downstream tail water level and the normal tail water level.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the cascade serial diversion type power station adopting the water turbine can effectively utilize the height difference between the normal operation water level and the upper limit water level of the accident working condition, reduce the excavation height and reduce the energy dissipation requirement.
The technical scheme adopted for solving the technical problems is as follows: the cascade serial water diversion type power station at least comprises an upper-stage water diversion power generation system and an adjacent lower-stage water storage regulation reservoir, wherein the tail water output end of the upper-stage water diversion power generation system is connected with the adjacent lower-stage water storage regulation reservoir, the cascade serial water diversion type power station also comprises an emergency water level regulation system, each stage of water storage regulation reservoir is respectively and independently connected with the emergency water level regulation system, and the installation height of the water turbine of the upper-stage water diversion power generation system is not lower than the highest water level of the adjacent lower-stage water storage regulation reservoir when the corresponding part of the emergency water level regulation system is at the maximum water level.
Furthermore, each level of water storage regulating reservoir is respectively composed of a river bed or an excavated regulating water supply tank between two adjacent levels of water diversion power generation systems.
The emergency water level regulating system comprises a plurality of regulating reservoirs, the number of which is equal to that of the water storage regulating reservoirs, and one regulating reservoir is correspondingly connected with the primary water storage regulating reservoir in a blocking way.
Furthermore, the cascade serial diversion type power station also comprises a plurality of overflow weirs, the number of which is equal to that of the water storage regulating reservoirs, and the water storage regulating reservoirs at all levels are separated from the regulating reservoirs at corresponding positions through the overflow weirs respectively and are communicated under the cooperation of the overflow weir tops.
The water storage regulating reservoir and the regulating reservoir of the same level are arranged at the upstream and downstream positions along the water flow direction.
Further, the water storage adjusting reservoir and the adjusting reservoirs at the same level are arranged in parallel along the water flow direction.
The preferable mode of above-mentioned scheme is, step concatenation diversion formula power station still include tail water tunnel and diversion tunnel, the water generator system of leading water of last level is connected with adjacent next level water storage regulation storehouse through the tail water tunnel, the water generator water delivery of the water generator system of leading water generator system of next level is introduced through diversion tunnel to adjacent last level water storage regulation storehouse.
Further, a connecting hole is further formed in each adjusting reservoir, and adjusting water in each adjusting reservoir is output through the connecting hole.
In a preferred embodiment of the above-described arrangement, the emergency water level control system further comprises a secondary control reservoir, the control water in each control reservoir being fed into the respective secondary control reservoir via a connection opening.
Furthermore, each stage of water storage adjusting reservoir is an underground sub-compartment adjusting water supply tank which is respectively arranged on the tail water end of the adjacent upper-stage power station, and the emergency water level adjusting system is an earth surface adjusting reservoir of the input end of the adjacent lower-stage power station which is connected through a water conveying hole.
The beneficial effects of the utility model are as follows: the technical scheme that this application provided is based on including last level diversion power generation system and adjacent next level water storage regulation storehouse at least, last level reference power generation system's tail water output and the current step power station that adjacent next level water storage regulation storehouse is connected, establishes the step of this application through increasing and concatenates diversion power station that sets up emergent water level regulation system to make each level water storage regulation storehouse be connected with emergent water level regulation system respectively independent respectively, then make last level diversion power generation system water bucket turbine's installation height be not less than the highest water level of adjacent next level water storage regulation storehouse when emergent water level regulation system corresponding part is in the maximum water level. Therefore, by limiting the accident condition upper limit water level to the normal operation water level, the height difference between the normal operation water level and the accident condition upper limit water level is fully utilized, the excavation height is obviously reduced, the energy dissipation requirement is reduced, and the purpose of effectively reducing the energy dissipation scale is achieved. Specifically, the total storage capacity of the regulating tank is divided into a regulating water supply tank and a regulating reservoir according to functions, and hydraulic connection of the regulating water supply tank and the regulating reservoir is established through the overflow weir, so that: 1) The scale of a single pond is obviously reduced, and the engineering excavation supporting treatment difficulty can be obviously reduced; 2) The spatial position relation between the adjusting water supply tank and the adjusting reservoir can be flexibly combined, so that the device can be better adapted to the topography and geological conditions; 3) The highest water level of the accident working condition is equal to the water level of the normal operation working condition, the problem of high accident water level is not considered in the installation elevation of the impact type unit, and the water head utilization rate is improved.
Drawings
FIG. 1 is a conceptual diagram of a cascade series connection diversion power station employing a water turbine according to the present utility model;
FIG. 2 is a conceptual structural schematic diagram of an embodiment of a cascade connection water-guiding power plant employing a water turbine according to the present utility model;
fig. 3, 4 and 5 are three simplified schematic structural diagrams of cascade water-guiding power stations of the present utility model using a water turbine;
fig. 6 is a conceptual structural diagram of another embodiment of a cascade connection water-guiding power station employing a water turbine according to the present utility model.
Marked in the figure as: the system comprises a diversion power generation system 1, a water storage adjusting warehouse 2, an emergency water level adjusting system 3, a hydraulic generator 4, an overflow weir 5, a tail water tunnel 6, a diversion tunnel 7, a connecting hole 8, a river channel 9, an underground compartment adjusting water supply tank 10, a water delivery tunnel 11 and a ground surface adjusting water storage pool 12.
Detailed Description
The utility model provides a cascade series diversion type power station which adopts a bucket turbine and can effectively utilize the height difference between the normal operation water level and the upper limit water level of the accident working condition, reduce the excavation height and reduce the energy dissipation requirement, as shown in figures 1 to 6. The cascade serial water diversion type power station at least comprises a primary water diversion power generation system 1 and an adjacent secondary water storage regulation warehouse 2, wherein the tail water output end of the primary water diversion power generation system 1 is connected with the adjacent secondary water storage regulation warehouse 2, and the cascade serial water diversion type power station is characterized in that: the cascade serial diversion type power station also comprises an emergency water level adjusting system 3, each stage of water storage adjusting warehouse 2 is respectively and independently connected with the emergency water level adjusting system 3, and the installation height of the bucket water turbine 4 of the upper stage of diversion power generation system 1 is not lower than the highest water level of the adjacent lower stage of water storage adjusting warehouse 2 when the corresponding position of the emergency water level adjusting system 3 is at the maximum water level. The technical scheme that this application provided is based on including last level diversion power generation system and adjacent next level water storage regulation storehouse at least, last level reference power generation system's tail water output and the current step power station that adjacent next level water storage regulation storehouse is connected, establishes the step of this application through increasing and concatenates diversion power station that sets up emergent water level regulation system to make each level water storage regulation storehouse be connected with emergent water level regulation system respectively independent respectively, then make last level diversion power generation system water bucket turbine's installation height be not less than the highest water level of adjacent next level water storage regulation storehouse when emergent water level regulation system corresponding part is in the maximum water level. Therefore, by limiting the accident condition upper limit water level to the normal operation water level, the height difference between the normal operation water level and the accident condition upper limit water level is fully utilized, the excavation height is obviously reduced, the energy dissipation requirement is reduced, and the purpose of effectively reducing the energy dissipation scale is achieved.
Correspondingly, according to the arrangement condition of the existing step diversion type power station, each level of water storage regulating reservoir 2 of the present application is respectively composed of a river bed or an excavated regulating water supply tank between two adjacent level diversion power generation systems. Thus, the emergency water level regulating system 3 of the present application may be configured to include a number of regulating reservoirs corresponding to the number of the water storage regulating reservoirs, such that one regulating reservoir corresponds to a connection which is blocked from the primary water storage regulating reservoir 2. Further, in order to reduce the excavation engineering volume and reduce the excavation degree of difficulty, the step diversion type power station of this application still include a plurality of overflow weirs 5 that quantity and water storage regulation storehouse 2 quantity are equivalent, the regulation cistern of water storage regulation storehouse 2 at each level and relevant position separate through overflow weirs 5 respectively to communicate under the cooperation on overflow weirs 5 weir tops. At this time, the water storage adjusting reservoir 2 and the adjusting reservoirs of the same level may be arranged at the upstream and downstream positions along the water flow direction, or may be arranged in parallel along the water flow direction. And the step water diversion type power station is combined again, and the step water diversion type power station further comprises the structural characteristics of a tail water tunnel 6 and a water diversion tunnel 7, wherein the upper-stage water diversion power generation system 1 is connected with the adjacent lower-stage water storage regulation warehouse 2 through the tail water tunnel 6, and the adjacent upper-stage water storage regulation warehouse 2 transmits water to the hydro-generator of the lower-stage water diversion power generation system through the water diversion tunnel 7.
Simultaneously, in order to be convenient for adjust the evacuation of cistern, this application still is provided with connecting hole 8 on each regulation cistern, and the regulation water that is arranged in each regulation cistern exports through connecting hole 8. Further, the emergency water level regulating system 3 further comprises a secondary regulating reservoir, and regulating water in each regulating reservoir is input into the corresponding secondary regulating reservoir through the connecting hole 8.
As shown in fig. 6, each level of water storage regulating reservoir 2 of the present application is an underground compartment regulating water supply tank 10 respectively arranged on the tail water end of an adjacent upper level power station, and the corresponding emergency water level regulating system 3 is an earth surface regulating reservoir 12 of the input end of an adjacent lower level power station connected through a water delivery hole 11.
To sum up, this application is directed against the problem that the back of body technique provided, and a equalizing basin with vice pond of overflow formula is provided, through limiting accident condition upper limit water level at normal operating water level, solves a series of problems such as the flood peak is extravagant, excavation altitude difference is too big, and the energy dissipation scale is big simultaneously.
The technical scheme of the application is further described by the following specific examples:
example 1
1. Conditions of implementation
As shown in fig. 1, to construct a land-side ground adjusting pool in a narrow valley topography, in a mountain narrow valley, the site is constrained by a high slope, a longitudinal river 9 and a transverse branch ditch, if a conventional adjusting pool is adopted, a high dam (or retaining wall) has to be constructed to meet the reservoir capacity requirement due to the limited area, and the technical difficulty is increased.
2. Front-back arrangement scheme for bank
In this embodiment, the basic layout pattern can only be arranged longitudinally along the river channel 9 due to the narrow valley, but a plurality of branch furrows are arranged between the valleys to further divide the topography. According to the function of adjusting the supply tank and adjusting the cistern, the difference of operating condition, with adjusting the supply tank and arranging in river course, hillside, the relative topography district that accomplishes of limit of branch ditch, guarantee the normal operating of power station. On the other hand, the adjusting reservoir is only put into use under the accident condition of the lower-level power station, and belongs to the special condition with lower probability, so that the requirements of the adjusting reservoir on the topography and geology can be reduced, the adjusting reservoir can be arranged at the opening of the branch ditch, and the water in the branch ditch can enter the river channel through the lower culvert pipe. When disasters such as large flood or debris flow occur in the branch ditches, the adjusting reservoir is allowed to be damaged, and the safe operation of the adjusting water supply tank and the main diversion line is not affected.
3. Engineering benefit
The present embodiment has 4 engineering benefits:
1) The single-tank storage capacity of the regulating tank is reduced, and the design and construction difficulty is reduced;
2) The method breaks through the limit of terrain, and is more flexible in arrangement;
3) The adjusting reservoir can adopt lower design standard, and part of engineering investment is saved on the premise of ensuring operation safety;
4) The installation height of the upper power station unit is reduced, and the power generation benefit is improved.
Example two
1. Conditions of implementation
As shown in fig. 6, the underground adjusting tank is required to be adopted due to various limitations, but the large-scale underground cavern is difficult to form a hole and the supporting difficulty is huge under the influence of bad geological conditions such as faults and the like.
Underground 'separated' arrangement scheme
In this embodiment, a separate arrangement of the regulated water supply tank and the regulated reservoir is employed. The underground water supply tank is divided into a plurality of compartments and connected through connecting holes. The adjusting water supply tank is connected with the ground surface adjusting reservoir through a water delivery hole. The surface conditioning reservoir can be selected at a reasonable location based on the topography and geological conditions, economics, etc.
3. Engineering benefit
This embodiment has 3 engineering benefits:
1) The underground cavern excavation scale is reduced, and the design difficulty of large-scale underground cavern group excavation supporting is reduced.
2) The adjusting reservoir can adopt lower design standard, and part of engineering investment is saved on the premise of ensuring operation safety;
3) The installation height of the upper power station unit is reduced, and the power generation benefit is improved.
Claims (10)
1. Adopt cascade concatenation drainage formula power station of water turbine, including last level diversion power generation system (1) and adjacent next level water storage regulation storehouse (2) at least, the tail water output of last level diversion power generation system (1) is connected its characterized in that with adjacent next level water storage regulation storehouse (2): the cascade serial diversion type power station also comprises an emergency water level regulating system (3), each stage of water storage regulating reservoir (2) is respectively and independently connected with the emergency water level regulating system (3), and the installation height of the bucket turbine (4) of the upper stage of diversion power generation system (1) is not lower than the highest water level of the adjacent lower stage of water storage regulating reservoir (2) when the corresponding position of the emergency water level regulating system (3) is at the maximum water level.
2. The cascade series diversion power station employing the water turbine as claimed in claim 1, wherein: each level of water storage regulating reservoir (2) is respectively composed of a river bed or an excavated regulating water supply tank between two adjacent levels of water diversion power generation systems.
3. The cascade series diversion power station employing the water turbine according to claim 1 or 2, wherein: the emergency water level regulating system (3) comprises a plurality of regulating reservoirs, the number of which is equal to that of the water storage regulating reservoirs (2), and one regulating reservoir is correspondingly connected with the primary water storage regulating reservoir (2) in a blocking way.
4. A cascade series connection diversion power station employing a water turbine as claimed in claim 3, wherein: the cascade serial diversion type power station also comprises a plurality of overflow weirs (5) the number of which is equivalent to that of the water storage regulating reservoirs (2), each level of the water storage regulating reservoirs (2) and the regulating reservoirs at corresponding positions are respectively separated by the overflow weirs (5) and are communicated under the cooperation of weir tops of the overflow weirs (5).
5. The cascade series diversion power station employing the water turbine as claimed in claim 4, wherein: the water storage adjusting reservoir (2) and the adjusting reservoirs at the same level are arranged at the upstream and downstream positions along the water flow direction.
6. The cascade series diversion power station employing the water turbine as claimed in claim 4, wherein: the water storage adjusting reservoir (2) and the adjusting reservoirs at the same level are arranged in parallel along the water flow direction.
7. The cascade series diversion power station employing the water turbine as claimed in claim 4, wherein: the cascade serial diversion type power station also comprises a tail water tunnel (6) and a diversion tunnel (7), the upper stage diversion power generation system (1) is connected with the adjacent lower stage water storage regulation warehouse (2) through the tail water tunnel (6), and the adjacent upper stage water storage regulation warehouse (2) transmits water to the hydro-generator of the lower stage diversion power generation system through the diversion tunnel (7).
8. The cascade series connection diversion power station adopting the water turbine as claimed in claim 7, wherein: and each adjusting reservoir is also provided with a connecting hole (8), and adjusting water in each adjusting reservoir is output through the connecting holes (8).
9. The cascade series diversion power station employing the water turbine as claimed in claim 8, wherein: the emergency water level regulating system (3) further comprises secondary regulating reservoirs, and regulating water in each regulating reservoir is input into the corresponding secondary regulating reservoir through the connecting hole (8).
10. The cascade series diversion power station employing the water turbine as claimed in claim 1, wherein: the water storage regulating reservoirs (2) at all levels are underground compartment regulating water supply tanks (10) respectively arranged on tail water ends of adjacent upper-level power stations, and the emergency water level regulating system (3) is an earth surface regulating reservoir (12) of the input ends of adjacent lower-level power stations connected through water delivery holes (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322182845.4U CN220620015U (en) | 2023-08-14 | 2023-08-14 | Cascade series diversion type power station adopting water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322182845.4U CN220620015U (en) | 2023-08-14 | 2023-08-14 | Cascade series diversion type power station adopting water turbine |
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| Publication Number | Publication Date |
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| CN220620015U true CN220620015U (en) | 2024-03-19 |
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| CN202322182845.4U Active CN220620015U (en) | 2023-08-14 | 2023-08-14 | Cascade series diversion type power station adopting water turbine |
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2023
- 2023-08-14 CN CN202322182845.4U patent/CN220620015U/en active Active
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