CN117144863A - Step pumped storage power station - Google Patents
Step pumped storage power station Download PDFInfo
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- CN117144863A CN117144863A CN202311271645.4A CN202311271645A CN117144863A CN 117144863 A CN117144863 A CN 117144863A CN 202311271645 A CN202311271645 A CN 202311271645A CN 117144863 A CN117144863 A CN 117144863A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 259
- 238000010248 power generation Methods 0.000 claims abstract description 80
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
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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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- Chemical & Material Sciences (AREA)
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- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention provides a step pumped storage power station, which comprises a reservoir, a water delivery system, a power generation system and a water pump turbine, wherein the reservoir is connected with the water delivery system; the water delivery system, the power generation system and the water pump turbine are arranged between every two reservoirs which are adjacent up and down; every two reservoirs which are adjacent up and down, the water delivery system, the power generation system and the water pump turbine which are communicated with each other form a primary pumped storage power station, and therefore an N-1-level pumped storage power station is formed. The invention fully utilizes the reservoir and the power station supporting facilities. The reservoirs in the middle layers are not only the lower reservoir of the upper-stage pumped storage power station, but also the upper reservoir of the lower-stage pumped storage power station, so that the site selection range of the pumped storage power station is greatly widened, the engineering investment is saved, and the method has wide guiding and popularization significance.
Description
Technical Field
The invention belongs to the technical field of pumped storage power stations, and particularly relates to a stepped pumped storage power station.
Background
The current pumped storage power station junction building mainly comprises an upper reservoir, a lower reservoir and a water delivery power generation system which is communicated with the upper reservoir, wherein the investment of the reservoirs is relatively high; meanwhile, the construction investment of the matched facilities such as the power station traffic engineering is higher. When the installation scale is fixed, the structural dimensions of the reservoir basin and the water delivery building are continuously increased along with the reduction of the rated head of the water pump turbine, so that not only is the investment increased to cause uneconomical, but also the reservoir site is possibly limited by the topography and geological conditions and the like to cause unsatisfied; with the increase of rated head of the water pump turbine, while investment of the reservoir is continuously reduced, abrasion and vibration of the unit are increased, structural stress of the water delivery power generation system is poor, so that the investment of the water delivery power generation system is increased, frequent shutdown for overhauling and even replacing the unit is possible, operation and maintenance cost of a power station is increased, and power generation benefits are affected. When the rated water head of the water pump turbine is too large, the manufacturing technical level of the unit is exceeded, and the station is not established.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a step pumped storage power station which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a step pumped storage power station, which comprises a reservoir (1), a water delivery system (2), a power generation system (3) and a water pump turbine (4);
the number of the reservoirs (1) is N, N is more than or equal to 3, the reservoirs are sequentially arranged at the corresponding reservoir site selection positions according to the direction from high to low, and the reservoir site selection positions are sequentially expressed as follows: 1 st reservoir R 1 Reservoir No. 2R 2 …, N reservoir R N ；
The water delivery system (2), the power generation system (3) and the water pump turbine (4) are arranged between every two reservoirs (1) which are adjacent up and down; each two reservoirs (1) which are adjacent to each other up and down, and the water delivery system (2), the power generation system (3) and the water pump turbine (4) which are communicated with each other form a primary pumped storage power station, thereby forming an N-1 stage pumped storage power station;
wherein for N-2 reservoirs (1) located in the middle position, namely: for reservoir No. 2R 2 …, N-1 reservoir R N-1 All are simultaneously used as the lower reservoir of the upper-stage pumped storage power station and the upper reservoir of the lower-stage pumped storage power station.
Preferably, for each N-2 reservoirs (1) positioned in the middle position, a lower reservoir water inlet and outlet corresponding to the upper-stage pumped storage power station and an upper reservoir water inlet and outlet corresponding to the lower-stage pumped storage power station are arranged; the water inlet and outlet of the lower reservoir and the water inlet and outlet of the upper reservoir are staggered, so that stable water flow in the reservoirs is ensured during simultaneous operation.
Preferably, the reservoir (1) is newly built or built by using the existing reservoir, river or lake; the maximum height difference of two reservoirs (1) which are adjacent up and down meets the manufacturing operation requirement of the water pump turbine (4).
Preferably, the maximum height difference between two reservoirs (1) adjacent to each other is less than 700m.
Preferably, each stage of pumped storage power station is provided with at least two sets of water delivery systems (2) and power generation systems (3) which can independently operate, and the single set of the pumped storage power station meets the requirement of the step pumped storage power station for joint scheduling operation when the single set of the pumped storage power station operates for 24 hours.
Preferably, the water delivery system (2) is provided with a level number of N-1, and the level numbers are expressed as follows in sequence from high to low: level 1 water delivery system T 1 Level 2 water delivery system T 2 …, N-1 th level water delivery system T N-1 ；
Each stage of water delivery system (2) comprises an upper reservoir water inlet and outlet, a water diversion system, a tail water system and a lower reservoir water inlet and outlet; for each stage of pumped storage power station, a reservoir (1) at the upstream end of the pumped storage power station is communicated with an upper reservoir water inlet and outlet of a water delivery system (2) at the stage, the reservoir (1) at the downstream end of the pumped storage power station is communicated with a lower reservoir water inlet and outlet of the water delivery system (2) at the stage, and during a power generation working condition, reservoir water at the upstream end flows through the upper reservoir water inlet and outlet of the water delivery system (2) at the stage, then flows through a water diversion system, a water pump turbine (4) at the stage and a tail water system in sequence, and flows into the reservoir (1) at the downstream end through the lower reservoir water inlet and outlet of the water delivery system (2) at the stage; when in pumping working condition, reservoir (1) water at the downstream end flows through the lower reservoir water inlet and outlet of the water delivery system (2) at the same level, then flows through the tail water system, the water pump turbine (4) and the water diversion system at the same level, and then flows into the reservoir (1) at the upstream end through the upper reservoir water inlet and outlet of the water delivery system (2), so that the reservoir (1) at the upstream end and the reservoir (1) at the downstream end are communicated through the waterway of the water delivery system (2).
Preferably, the power generation system (3) is provided with N-1 stages, and the stages are expressed as follows in the direction from high to low: level 1 power generation system E 1 2 nd stage power generation system E 2 …, N-1 th stage power generation system E N-1 The method comprises the steps of carrying out a first treatment on the surface of the Each stage of the power generation system (3) comprises a power generation plant and an auxiliary building thereof.
Preferably, the number of the water pump turbines (4) arranged in each stage of pumped storage power station is not less than 2, and the specific number is determined according to the principle that the rated flow rate of each single machine in the stage is multiplied by 24h is not less than (the rated flow rate of each single machine in the whole set is multiplied by the sum of the designed continuous full-time hours).
Preferably, a scheduling mode that all the step pumped storage power stations operate or a plurality of stages of pumped storage power stations operate in a combined mode or a certain stage of pumped storage power stations operate singly is adopted according to the water storage condition of the reservoir (1), the overhaul condition of the power stations and the power grid requirement.
The step pumped storage power station provided by the invention has the following advantages:
and the reservoir and power station supporting facilities are fully utilized. The reservoirs in the middle layers are not only the lower reservoir of the upper-stage pumped storage power station, but also the upper reservoir of the lower-stage pumped storage power station. According to the overall engineering conditions of the step pumped storage power stations, the arrangement and the structural style of the junction building of each level of pumped storage power stations are flexibly selected, so that uneconomical caused by too small rated head of a water pump turbine is avoided, and larger constraint conditions of a basin are avoided; the method has the advantages of avoiding larger abrasion, vibration and the like caused by overlarge rated water head of the water pump turbine, improving the conditions of structural stress and the like of the water delivery power generation system, reducing the investment and the shutdown maintenance times of the water delivery power generation system, saving the operation and maintenance cost of a power station, increasing the power generation benefit, thoroughly solving the technical problem that the station address is not established due to the restriction of the manufacturing level of a unit, greatly widening the station address selection range of the pumped storage power station, saving the engineering investment, and having wide guidance and popularization significance.
Drawings
FIG. 1 is a plan view of a stepped pumped storage power station provided by the invention;
fig. 2 is a longitudinal section view of a step pumped storage power station provided by the invention.
Wherein:
1 represents a reservoir; 2 represents a water delivery system; 3 represents a power generation system; 4 represents a water pump turbine;
1.1 represents the 1 st reservoir; 1.2 represents the 2 nd reservoir; 1.3 represents the 3 rd reservoir;
2.1 represents a level 1 water delivery system; 2.2 represents a level 2 water delivery system;
3.1 represents a stage 1 power generation system; 3.2 represents a 2 nd stage power generation system;
4.1 represents a 1 st stage pump turbine; 4.2 represents a 2 nd-stage water pump turbine;
2.1.1 represents a water inlet and a water outlet of the 1 st-stage upper reservoir; 2.1.2 represents a level 1 water diversion system; 2.1.3 represents a grade 1 tail water system; 2.1.4 represents a water inlet and a water outlet of the reservoir under the 1 st level;
2.2.1 represents a water inlet and outlet of the upper reservoir of the 2 nd level; 2.2.2 represents a level 2 priming system; 2.2.3 represents a grade 2 tail water system; 2.2.4 represents a water inlet and a water outlet of the reservoir under the 2 nd level;
3.1.1 represents a 1 st-stage power generation plant; 3.1.2 represents a level 1 auxiliary building;
3.2.1 represents a 2 nd-stage power generation plant; 3.2.2 represents a level 2 auxiliary building.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention aims to provide a step pumped storage power station, which fully utilizes reservoirs and power station supporting facilities in each layer in the middle, and can solve the problems of low reservoir utilization rate, uneconomical rated water head of a water pump turbine being too small and difficult reservoir site arrangement of a conventional pumped storage power station; and the water pump turbine has large abrasion and vibration caused by overlarge rated water head, and the water delivery power generation system has the technical problems of poor structural stress condition, large investment, high shutdown maintenance times, station address unsatisfied even exceeding the manufacturing level of a unit, and the like.
The invention provides a step pumped storage power station, referring to fig. 1 and 2, comprising a reservoir 1, a water delivery system 2, a power generation system 3 and a water pump turbine 4;
the number of the reservoirs 1 is N,n is more than or equal to 3, and is sequentially arranged at the corresponding reservoir site selection position according to the direction from high to low, and is sequentially expressed as: 1 st reservoir R 1 Reservoir No. 2R 2 …, N reservoir R N ；
The water delivery system 2, the power generation system 3 and the water pump turbine 4 are arranged between every two reservoirs 1 which are adjacent up and down; every two reservoirs 1 which are adjacent up and down, the water delivery system 2, the power generation system 3 and the water pump turbine 4 which are communicated with each other form a primary pumped storage power station, thereby forming an N-1 stage pumped storage power station;
wherein for N-2 reservoirs 1 located in the middle position, namely: for reservoir No. 2R 2 …, N-1 reservoir R N-1 All are simultaneously used as the lower reservoir of the upper-stage pumped storage power station and the upper reservoir of the lower-stage pumped storage power station. In the concrete implementation, for each N-2 reservoirs 1 positioned in the middle position, a lower reservoir water inlet and outlet corresponding to a higher-level pumped storage power station and an upper reservoir water inlet and outlet corresponding to a lower-level pumped storage power station are arranged; the water inlet and outlet of the lower reservoir and the water inlet and outlet of the upper reservoir are staggered, so that stable water flow in the reservoirs is ensured during simultaneous operation.
In the invention, the reservoir 1 is newly built or built by using the existing reservoirs, rivers or lakes and the like; the maximum height difference between two reservoirs 1 adjacent to each other is preferably less than 700m, and meets the requirements of the operation and the manufacture of the pump turbine 4.
Each stage of pumped storage power station is provided with at least two sets of water delivery systems 2 and power generation systems 3 which can independently operate, and the single set of the water delivery systems and the power generation systems can meet the requirement of the step pumped storage power station on joint scheduling operation when the single set of the water delivery systems and the power generation systems operate for 24 hours.
Specifically, the water delivery system 2 is set to have a level of N-1, and is sequentially expressed as: level 1 water delivery system T 1 Level 2 water delivery system T 2 …, N-1 th level water delivery system T N-1 ；
Each stage of water delivery system 2 comprises an upper reservoir water inlet and outlet, a water diversion system, a tail water system and a lower reservoir water inlet and outlet; for each stage of pumped storage power station, the reservoir 1 at the upstream end is communicated with the water inlet and outlet of the upper reservoir of the water delivery system 2 of the stage, the reservoir 1 at the downstream end is communicated with the water inlet and outlet of the lower reservoir of the water delivery system 2 of the stage, and during the power generation working condition, the reservoir 1 at the upstream end flows through the water inlet and outlet of the upper reservoir of the water delivery system 2 of the stage, then flows through the water diversion system, the water turbine 4 of the water pump of the stage and the tail water system in sequence, and flows into the reservoir 1 at the downstream end through the water inlet and outlet of the lower reservoir of the water delivery system 2 of the stage; when the water pumping working condition is adopted, reservoir water at the downstream end flows through a lower reservoir water inlet and outlet of the water delivery system 2, then flows through a tail water system, the water turbine 4 of the water pump and the water diversion system in sequence, flows into the reservoir 1 at the upstream end through an upper reservoir water inlet and outlet of the water delivery system 2, and realizes waterway communication between the reservoir 1 at the upstream end and the reservoir 1 at the downstream end through the water delivery system 2.
The number of the setting stages of the power generation system 3 is N-1, and the setting stages are expressed as follows in sequence from high to low: level 1 power generation system E 1 2 nd stage power generation system E 2 …, N-1 th stage power generation system E N-1 The method comprises the steps of carrying out a first treatment on the surface of the Each stage of the power generation system 3 comprises a power generation plant and an auxiliary building thereof.
The number of the water pump turbines 4 arranged in each stage of the pumped storage power station is not less than 2, and the specific number is determined according to the principle that (the rated flow of each single machine in the single stage is multiplied by 24 h) is not less than (the rated flow of each single machine in the whole set is multiplied by the sum of the designed continuous full-time hours).
According to the water storage of the reservoir 1, the overhaul condition of the power station and the power grid demand, a scheduling mode of all operation of the step pumped storage power station or combined operation of a plurality of stages of pumped storage power stations or independent operation of a certain stage of pumped storage power station is adopted.
Two embodiments are described below:
embodiment one:
1-2, the embodiment of the invention provides a stepped pumped storage power station, which mainly comprises reservoirs 1 with N more than or equal to 3, a water delivery system 2 with N-1 level, a power generation system 3 with N-1 level and a water pump turbine 4 with N-1 level;
the reservoirs 1 are sequentially 1 st reservoir R from high to low 1 Reservoir No. 2R 2 …, N reservoir R N Respectively setting at different heights according to engineering conditions. The maximum height difference of two reservoirs 1 adjacent to each other up and down meets the manufacturing requirement of the water pump turbine 4; in reservoir No. 2R 2 …, N-1 reservoir R N And the upper reservoir water inlet and the lower reservoir water inlet which correspond to different pumped storage power station stages are arranged at the same time, and are staggered, so that the water flow in the reservoirs is stable during the simultaneous operation of the two water inlets and the lower reservoir water inlets. 2 nd reservoir R 2 …, N-1 reservoir R N The water storage device is not only a lower reservoir of the upper-stage water storage power station, but also an upper reservoir of the lower-stage water storage power station.
The water delivery system 2 comprises a 1 st-level water delivery system T from the high position to the low position 1 Level 2 water delivery system T 2 …, N-1 th level water delivery system T N-1 The method comprises the steps of carrying out a first treatment on the surface of the Each level of water delivery system consists of an upper reservoir water inlet and outlet, a water diversion system, a tail water system and a lower reservoir water inlet and outlet; the water pumping and storing power stations according to different stages can be further subdivided, such as a 1 st stage water pumping and storing power station, and the 1 st stage water pumping and storing power station corresponds to 2.1.1 of the 1 st stage water inlet and outlet of the upper reservoir, 2.1.2 of the 1 st stage water diversion system, 2.1.3 of the 1 st stage tail water system and 2.1.4 of the 1 st stage water inlet and outlet of the lower reservoir; the 2 nd-level pumped storage power station corresponds to 2.2.1 of the water inlet and outlet of the 2 nd-level upper reservoir, 2.2.2 of the 1 st-level water diversion system, 2.2.3 of the 2 nd-level tail water system and 2.2.4 of the water inlet and outlet of the 2 nd-level lower reservoir.
The power generation system 3 comprises a 1 st-stage power generation system E from high to low 1 2 nd stage power generation system E 2 …, N-1 th stage power generation system E N-1 The method comprises the steps of carrying out a first treatment on the surface of the Each stage of power generation system consists of a power generation plant and an affiliated building thereof; the power generation plant and the auxiliary buildings thereof can be further subdivided according to different stages, such as a 1 st stage pumped storage power station, which corresponds to a 1 st stage power generation plant 3.1.1 and a 1 st stage auxiliary building 3.1.2. The 2 nd-level pumped storage power station corresponds to a 2 nd-level power generation plant 3.2.1 and a 2 nd-level auxiliary building 3.2.2.
The water pump turbine 4 comprises a 1 st stage water pump turbine M from high to low 1 2 nd stage water pump turbine M 2 …, N-1 th stageWater pump turbine M N-1 . And the number of the water pump turbines 4 in each stage of pumped storage power station is not less than 2, and the specific number is determined according to the principle that the rated flow rate of each single machine in the stage is multiplied by 24 hours (the rated flow rate of each single machine in the whole set is multiplied by the sum of the designed continuous full-time hours).
Each stage of pumped storage power station consists of two reservoirs 1 which are adjacent up and down, a current stage water delivery system 2, a current stage power generation system 3 and a current stage water pump turbine 4, wherein the current stage water delivery system 2, the current stage power generation system 3 and the current stage water pump turbine 4 are communicated with each other; at least two sets of water delivery systems 2, power generation systems 3 and water pump turbines 4 which can independently operate are arranged, and the arrangement scale of a single set can meet the requirement of ensuring the joint scheduling operation of the step pumped storage power station when the single set operates for 24 hours.
According to the conditions of water storage of the reservoir 1, overhaul of the power station and the like and the power grid demand, a scheduling mode that all the step pumped storage power stations operate or the several steps pumped storage power stations operate in a combined mode or a certain stage pumped storage power station operates singly is adopted.
Embodiment two:
the embodiment takes the engineering of a certain step pumped storage power station adopting the technical scheme of the invention as an example and further describes with reference to the accompanying drawings:
a step pumped storage power station is developed in two stages, and the step pumped storage power station is adopted.
As shown in fig. 1-2, a stepped pumped storage power station mainly comprises 3 reservoirs 1, a 2-level water delivery system 2 and a 2-level power generation system 3.
The reservoir 1 is from high to low and comprises a 1 st reservoir 1.1, a 2 nd reservoir 1.2 and a 3 rd reservoir 1.3, wherein the 1 st reservoir 1.1 and the 2 nd reservoir 1.2 are newly built according to three high Cheng Shezhi of 1400m, 950m and 400m respectively, the 3 rd reservoir 1.3 utilizes the existing reservoir, the height difference of the bottoms of the 1 st reservoir 1.1 and the 2 nd reservoir 1.2 is 450m, the height difference of the bottoms of the 2 nd reservoir 1.2 and the 3 rd reservoir 1.3 is 550m, and the manufacturing requirement of the water pump turbine 4 is met; the 2 nd reservoir 1.2 is not only the lower reservoir of the first-stage pumped storage power station, but also the upper reservoir of the second-stage pumped storage power station.
The water delivery system 2 comprises a 1 st-level water delivery system 2.1 and a 2 nd-level water delivery system 2.2 from high to low, and comprises a water inlet and outlet of an upper reservoir, a water diversion system, a tail water system and a water inlet and outlet of a lower reservoir. Wherein: the level 1 water delivery system 2.1 comprises a level 1 upper reservoir water inlet and outlet 2.1.1, a level 1 water diversion system 2.1.2, a level 1 tail water system 2.1.3 and a level 1 lower reservoir water inlet and outlet 2.1.4; the 2 nd level water delivery system 2.2 comprises a 2 nd level upper reservoir water inlet and outlet 2.2.1, a 2 nd level water diversion system 2.2.2, a 2 nd level tail water system 2.2.3 and a 2 nd level lower reservoir water inlet and outlet 2.2.4. In the 2 nd reservoir 1.2, 2.2.1 of the level 2 upper reservoir water inlet and outlet and 2.1.4 of the level 1 lower reservoir water inlet and outlet are simultaneously arranged, and are staggered by 500m, so that the water flow in the reservoir is stable during the simultaneous operation of the two reservoirs.
The power generation system 3 comprises a 1 st-level power generation system 3.1 and a 2 nd-level power generation system 3.2 from high to low, and comprises a power generation plant and an affiliated building thereof. Wherein: the level 1 power generation system 3.1 comprises a level 1 power generation plant 3.1.1 and a level 1 auxiliary building 3.1.2; the level 2 power generation system 3.2 comprises a level 2 power generation plant 3.2.1 and a level 2 auxiliary building 3.2.2.
The first-stage pumped storage power station comprises a 1 st reservoir 1.1, a 1 st water delivery system 2.1, a 1 st power generation system 3.1 and a 2 nd reservoir 1.2, wherein the 1 st water delivery system 2.1.2 and the 1 st tail water system 2.1.3 adopt one pipe and one machine, 3 300MW water pump turbines are arranged in the 1 st power generation plant 3.1.1, the rated water head is 430m, and the rated flow of the single machine is 80m 3 S, continuously full hair for 6 hours; the second-stage pumped storage power station comprises a 2 nd reservoir 1.2, a 2 nd-stage water delivery system 2.2, a 2 nd-stage power generation system 3.2 and a 3 rd reservoir 1.3, wherein the 2 nd-stage water delivery system 2.2.2 adopts a pipe and two machines, the 2 nd-stage tail water system 2.2.3 adopts a pipe and one machine, 4 300MW water pump turbines are arranged in the 2 nd-stage power generation plant 3.2.1, the rated water head is 530m, and the rated flow of a single machine is 65m 3 And/s, continuously full hair for 6 hours. The setting scale of a single set of the two-stage pumped storage power station meets the requirement of ensuring the joint scheduling operation of the step pumped storage power station when the two-stage pumped storage power station operates for 24 hours.
According to the conditions of water storage of the reservoir 1, overhaul of the power station and the like and the power grid demand, a scheduling mode that the two-stage pumped storage power station operates entirely or the first-stage pumped storage power station operates singly or the second-stage pumped storage power station operates singly is adopted.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the reservoir and power station supporting facilities of the middle layer are fully utilized, the arrangement and the structural style of the hub building of each level of pumped storage power station are flexibly selected according to the overall engineering condition of the step pumped storage power station, the uneconomical caused by too small rated water head of the water pump turbine is avoided, and the restriction condition of larger basin in the reservoir is avoided; the method has the advantages of avoiding larger abrasion, vibration and the like caused by overlarge rated water head of the water pump turbine, improving the conditions of structural stress and the like of the water delivery power generation system, reducing the investment and the shutdown maintenance times of the water delivery power generation system, saving the operation and maintenance cost of a power station, increasing the power generation benefit, thoroughly solving the technical problem that the station address is not established due to the restriction of the manufacturing level of a unit, greatly widening the station address selection range of the pumped storage power station, saving the engineering investment, and having wide guidance and popularization significance.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (9)
1. The step pumped storage power station is characterized by comprising a reservoir (1), a water delivery system (2), a power generation system (3) and a water pump turbine (4);
the number of the reservoirs (1) is N, N is more than or equal to 3, the reservoirs are sequentially arranged at the corresponding reservoir site selection positions according to the direction from high to low, and the reservoir site selection positions are sequentially expressed as follows: 1 st reservoir R 1 Reservoir No. 2R 2 …, N reservoir R N ；
The water delivery system (2), the power generation system (3) and the water pump turbine (4) are arranged between every two reservoirs (1) which are adjacent up and down; each two reservoirs (1) which are adjacent to each other up and down, and the water delivery system (2), the power generation system (3) and the water pump turbine (4) which are communicated with each other form a primary pumped storage power station, thereby forming an N-1 stage pumped storage power station;
wherein for N-2 reservoirs (1) located in the middle position, namely: for reservoir No. 2R 2 …, N-1 reservoir R N-1 All are simultaneously used as the lower reservoir of the upper-stage pumped storage power station and the upper reservoir of the lower-stage pumped storage power station.
2. A stepped pumped-storage power station according to claim 1, characterized in that for each of the N-2 reservoirs (1) located in the intermediate position, a lower reservoir water inlet and outlet corresponding to the upper pumped-storage power station and an upper reservoir water inlet and outlet corresponding to the lower pumped-storage power station are provided; the water inlet and outlet of the lower reservoir and the water inlet and outlet of the upper reservoir are staggered, so that stable water flow in the reservoirs is ensured during simultaneous operation.
3. A stepped pumped storage plant according to claim 1, characterized in that said reservoir (1) is built for new construction or with existing reservoirs, rivers or lakes; the maximum height difference of two reservoirs (1) which are adjacent up and down meets the manufacturing operation requirement of the water pump turbine (4).
4. A stepped pumped storage plant according to claim 1, characterized in that the maximum difference in height between two reservoirs (1) adjacent one above the other is less than 700m.
5. A cascade pumped-storage power station according to claim 1, characterized in that each stage of pumped-storage power station is provided with at least two sets of water delivery system (2) and power generation system (3) which can be operated independently, and the single set of arrangement scale meets the requirement that the cascade pumped-storage power station can be operated in a joint scheduling manner when the single set of arrangement scale is operated for 24 hours.
6. The step pumped storage power station as set forth in claim 1, wherein the number of the water delivery system (2) is N-1, and the steps are expressed as follows in the direction from high to low: level 1 water delivery system T 1 Level 2 water delivery system T 2 …, N-1 th level water delivery system T N-1 ；
Each stage of water delivery system (2) comprises an upper reservoir water inlet and outlet, a water diversion system, a tail water system and a lower reservoir water inlet and outlet; for each stage of pumped storage power station, a reservoir (1) at the upstream end of the pumped storage power station is communicated with an upper reservoir water inlet and outlet of a water delivery system (2) at the stage, the reservoir (1) at the downstream end of the pumped storage power station is communicated with a lower reservoir water inlet and outlet of the water delivery system (2) at the stage, and during a power generation working condition, reservoir water at the upstream end flows through the upper reservoir water inlet and outlet of the water delivery system (2) at the stage, then flows through a water diversion system, a water pump turbine (4) at the stage and a tail water system in sequence, and flows into the reservoir (1) at the downstream end through the lower reservoir water inlet and outlet of the water delivery system (2) at the stage; when in pumping working condition, reservoir (1) water at the downstream end flows through the lower reservoir water inlet and outlet of the water delivery system (2) at the same level, then flows through the tail water system, the water pump turbine (4) and the water diversion system at the same level, and then flows into the reservoir (1) at the upstream end through the upper reservoir water inlet and outlet of the water delivery system (2), so that the reservoir (1) at the upstream end and the reservoir (1) at the downstream end are communicated through the waterway of the water delivery system (2).
7. The stepped pumped storage power station according to claim 1, wherein the number of setting stages of the power generation system (3) is N-1, expressed in the direction from high to low in order as: level 1 power generation system E 1 2 nd stage power generation system E 2 …, N-1 th stage power generation system E N-1 The method comprises the steps of carrying out a first treatment on the surface of the Each stage of the power generation system (3) comprises a power generation plant and an auxiliary building thereof.
8. The step pumped storage power station according to claim 1, wherein the number of the water pump turbines (4) arranged in each stage of the pumped storage power station is not less than 2, and the specific number is determined according to the principle that (the rated flow rate of each single machine of the present stage is multiplied by 24 h) is not less than (the rated flow rate of each single machine of the present stage is multiplied by the sum of the designed continuous full-time hours).
9. A cascade pumped-storage power station according to claim 1, characterized in that a scheduling mode of all or a combination of several stages of pumped-storage power stations or a single stage of pumped-storage power station is adopted according to the water storage of the reservoir (1), the overhaul condition of the power station and the power grid demand.
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| CN202311271645.4A CN117144863A (en) | 2023-09-28 | 2023-09-28 | Step pumped storage power station |
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