CN111809582A

CN111809582A - Pumped storage power station constructed by utilizing conventional hydropower station resources

Info

Publication number: CN111809582A
Application number: CN202010822749.XA
Authority: CN
Inventors: 李延频; 李士辉; 李乾龙; 张自超; 李济源; 贾凯凯
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-10-23

Abstract

A pumped storage power station constructed by utilizing conventional hydropower station resources is characterized in that a reservoir dam is arranged at the outlet of a reservoir of the conventional hydropower station, an upper reservoir of the pumped storage power station is formed by a reservoir of the conventional hydropower station through a first dam and a reservoir dam rail, the water outlet of the reservoir of the conventional hydropower station is communicated with the water inlet of a unit in a factory building of the conventional hydropower station through a first water leading pipe, the water outlet of the upper reservoir of the pumped storage power station is communicated with the pumped storage unit in the factory building of the pumped storage power station through a second water leading pipe, the water outlet of the pumped storage unit in the factory building of the pumped storage power station and the water outlet of the unit in the factory building of the conventional hydropower station are communicated with a tail water channel of the conventional hydropower station, and the tail water channel of the conventional; the system has the advantages of simple structure, novel and unique design, simple survey planning and site selection of the pumped storage power station, easy construction and realization, short construction period and low construction cost, can effectively improve the peak regulation and frequency modulation capability of the system, and has remarkable social and economic benefits.

Description

Pumped storage power station constructed by utilizing conventional hydropower station resources

Technical Field

The invention relates to a pumped storage power station, in particular to a pumped storage power station constructed by utilizing conventional hydropower station resources.

Background

At present, the energy storage and regulation functions of a pumped storage power station are utilized, the energy utilization rate and the frequency modulation and peak regulation capacity of a power system are improved, the important content and the inevitable trend of energy and power construction in China are also important ways for fully utilizing and consuming clean energy such as wind power and photovoltaic power generation, but the pumped storage power station is high in construction cost, long in construction period, and time-consuming and troublesome in survey planning and site selection. The problem of water source supplement of a pumped storage power station is mainly solved by (1), because water in upper and lower reservoirs of the pumped storage power station is continuously evaporated and leaked and needs to be continuously supplemented with water, the pumped storage power station needs to be built in a place beneficial to water supplement, a conventional hydropower station has natural water resource advantages, and the problem of water quantity supplement of evaporation and leakage of the pumped storage power station can be effectively solved by taking tail water of the conventional hydropower station as a water source of the pumped storage power station; (2) surveying planning and site selection of upper and lower banks of the pumped storage power station. The conventional hydropower station has large reservoir capacity, can build a pumped storage power station by using the resources of the conventional hydropower station, reduces the site selection and excavation amount of upper and lower reservoirs of the pumped storage power station, shortens the construction period and reduces the construction cost, but has no public report until now.

Disclosure of Invention

In view of the above situation, in order to overcome the defects of the prior art, the invention aims to provide a pumped storage power station constructed by using conventional hydropower station resources, which can effectively solve the problems of high construction cost, long construction period, and time and labor consumption in survey planning and site selection of the pumped storage power station.

In order to achieve the purpose, the invention adopts the technical scheme that the pumped storage power station constructed by utilizing conventional hydropower station resources comprises a conventional hydropower station reservoir, a box dam, a factory building and a pumped storage power station upper reservoir, wherein a reservoir dam is arranged at the outlet of the conventional hydropower station reservoir, the upper reservoir of the pumped storage power station is formed by a reservoir of a conventional hydropower station through a first dam and a dam rail of the reservoir, a water outlet of the reservoir of the conventional hydropower station is communicated with a water inlet of a unit in a factory building of the conventional hydropower station through a first water conduit, a water outlet of the upper reservoir of the pumped storage power station is communicated with a pumped storage unit in the factory building of the pumped storage power station through a second water conduit, a water outlet of the pumped storage unit in the factory building of the pumped storage power station and a water outlet of the unit in the factory building of the conventional hydropower station are communicated with a tail water channel of the conventional hydropower station, and the tail water channel of the conventional hydropower station forms a lower reservoir of the pumped storage.

The invention has simple structure, novel and unique design, simple survey planning and site selection of the pumped storage power station, easy construction and realization, short construction period and low construction cost, can effectively improve the peak regulation and frequency regulation capacity of the system and has remarkable social and economic benefits.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the invention is provided in connection with the accompanying drawings and the detailed description.

The pumped storage power station constructed by utilizing the conventional hydropower station resources comprises a conventional hydropower station reservoir, a box dam, a factory building and a pumped storage power station upper reservoir, wherein a reservoir dam 4 is arranged at the outlet of the conventional hydropower station reservoir 1, the upper pumped storage power station reservoir 3 is formed by a conventional hydropower station reservoir 1 through a first dam 2 and a reservoir dam 4 fence, a water outlet of the conventional hydropower station reservoir 1 is communicated with a unit water inlet in a conventional hydropower station factory building 6 through a first water conduit 9, a water outlet of the upper pumped storage power station reservoir 3 is communicated with a pumped storage unit 12 in a pumped storage power station factory building 5 through a second water conduit 10, a water outlet of the pumped storage unit 12 in the pumped storage power station factory building 5 and a water outlet of the unit in the conventional hydropower station factory building 6 are communicated with a tail water channel 7 of the conventional hydropower station, and the tail water channel 7 of the conventional hydropower station fence forms a lower pumped storage power station reservoir 13 through a second dam 8.

In order to ensure better implementation effect, the conventional hydropower station factory building 6 and the pumped storage power station factory building 5 are of a combined construction type or a split type structure, and when the conventional hydropower station factory building 6 and the pumped storage power station factory building 5 are of the split type structure, the outlet of the pumped storage unit 12 in the pumped storage power station factory building 5 is connected with the lower pumped storage power station reservoir 13 through the third water conduit 11.

The pumped storage unit 12 is a reversible mixed-flow turbine, a reversible axial-flow turbine, a reversible diagonal-flow turbine or a reversible through-flow turbine.

The invention utilizes the reservoir dam of the conventional hydropower station to build the upper reservoir of the pumped storage power station, fully utilizes the reservoir capacity and dam resources of the conventional hydropower station, reduces the excavation amount of the upper reservoir of the pumped storage power station, solves the problems of site selection and capacity of the upper reservoir of the pumped storage power station, the factory building of the pumped storage power station is reconstructed from the conventional hydropower station factory building into an integral structure (as shown in figure 1) or is independently newly built (as shown in figure 2), the pumped storage unit can select a reversible mixed flow type water turbine, a reversible axial flow type water turbine, a reversible inclined flow type water turbine or a reversible through flow type water turbine from high to low according to the available water head, utilizes the tail water channel dam of the conventional hydropower station to build the lower reservoir of the pumped storage power station or dam around the tail water channel, can fully utilize the capacity and position of the tail water channel of the conventional hydropower station, solves the problems of site selection and capacity of the lower reservoir of the pumped storage power station, and can also, the problem of insufficient water caused by water evaporation and leakage of a pumped storage power station is effectively solved; therefore, the construction period of the pumped storage power station can be shortened, the construction cost is saved, and the problem that the construction cost of the pumped storage power station is higher is solved.

Compared with a pumped storage power station which is built independently or a conventional hydropower station which is built independently, the pumped storage power station built by the invention has obvious advantages, and the pumped storage power station has the following concrete advantages:

1. the problem of independently building the water source of the pumped storage power station is effectively solved. The tail water of the conventional hydropower station is used as a water source of the pumped storage power station, so that the water quantity required by the pumped storage power station is ensured;

2. the problem of site selection of the pumped storage power station is solved. The site selection of the pumped storage power station is the primary task of survey planning, and consumes a large amount of manpower and material resources, and the site selection problem of the pumped storage power station is solved by methods such as transformation, extension, new construction and the like according to the existing geographic conditions of the conventional hydropower station and the existing resources such as hydraulic buildings, the construction period is shortened, the construction cost is saved, and the construction cost is saved by more than 50%;

3. the problem of low annual utilization hours of a conventional hydropower station which is independently constructed is solved. The conventional hydropower station is limited by the amount of water, so that the annual utilization hour is low and generally less than 4000 hours/year, and the peak-load and frequency-modulation capacity of the power system is improved and the stability and flexibility of the power system are improved by additionally building a pumped storage power station;

4. the problem that new energy such as wind power and photovoltaic can not be absorbed by a conventional hydropower station which is independently constructed is solved. The existing conventional hydropower station resources are utilized to build a pumped storage power station, so that the water resources of the conventional hydropower station are recycled, the utilization efficiency of the water resources is improved, new energy in a power grid is effectively consumed, a multi-energy complementary clean energy combined utilization system of water, wind, light and the like is formed, the stability and flexibility of a power system are improved, and the capacity of peak regulation and frequency modulation of the system are also improved;

5. the method provides support for pumped storage transformation of a conventional hydropower station, can effectively solve the problem of full utilization of clean energy, solves the problems of wind abandonment, light abandonment and water abandonment, improves the utilization rate of the clean energy, and has remarkable social and economic benefits.

Claims

1. A pumped storage power station constructed by utilizing resources of a conventional hydropower station comprises a conventional hydropower station reservoir, a box dam, a factory building and a pumped storage power station upper reservoir, wherein a reservoir dam (4) is arranged at an outlet of the conventional hydropower station reservoir (1), the pumped storage power station upper reservoir (3) is formed by the conventional hydropower station reservoir (1) through a first box dam (2) and a reservoir dam (4) fence, a water outlet of the conventional hydropower station reservoir (1) is communicated with a unit water inlet in the conventional hydropower station factory building (6) through a first water diversion pipe (9), a water outlet of the pumped storage power station upper reservoir (3) is communicated with a pumped storage unit (12) in the pumped storage power station factory building (5) through a second water diversion pipe (10), a water outlet of the storage unit (12) in the pumped storage power station factory building (5) and a water outlet of the unit in the conventional hydropower station factory building (6) are communicated with a conventional hydropower station tail water diversion trench (7), and a conventional hydropower station tail canal (7) forms a pumped storage power station lower reservoir (13) through a second dam (8) fence.

2. The pumped storage power plant constructed by using the conventional hydropower station resources as claimed in claim 1, wherein the conventional hydropower station building (6) and the pumped storage power plant building (5) are of a combined or separated structure, and when the conventional hydropower station building (6) and the pumped storage power plant building (5) are of a separated structure, the water outlet of the pumped storage unit (12) in the pumped storage power plant building (5) is connected with the pumped storage power plant lower reservoir (13) through a third water conduit (11).

3. The pumped-storage power plant built using conventional hydroelectric power plant resources of claim 1, wherein said pumped-storage aggregate (12) is a reversible francis turbine, a reversible axial turbine, a reversible diagonal turbine, or a reversible cross-flow turbine.