CN104612111A

CN104612111A - Method for increasing regulation storage and generating compensation benefits of high-dam leading reservoir

Info

Publication number: CN104612111A
Application number: CN201410761200.9A
Authority: CN
Inventors: 范国福
Original assignee: PowerChina Guiyang Engineering Corp Ltd
Current assignee: PowerChina Guiyang Engineering Corp Ltd
Priority date: 2014-12-13
Filing date: 2014-12-13
Publication date: 2015-05-13

Abstract

The invention discloses a method for increasing regulation storage and generating compensation benefits of a high-dam leading reservoir. According to the method, a water turbine and difference of dynamic water generating of a water diversion system and a safe waterhead of still water retaining are adopted, a new limit dead water level is set below an existing dead water level of the reservoir, the regulation storage and the available water supply in the dry season can be increased, and the generating benefits of all downstream hydropower stations are increased accordingly; a hydraulic turbine set and a corresponding water diversion generating system which are suitable for operation of the limit dead water level and the original dead water level are additionally arranged, and the generating benefits of the hydropower stations are increased; the newly increased available water supply in the dry season enables other weepage water channels of the hydropower stations to discharge; after the limit dead water level is additionally set, the function of emptying the upper layer water storage is achieved as well. According to the method, the direct water supply generating benefits are remarkable, national energy security is facilitated, and the grid electric energy quality is promoted beneficially; meanwhile, the method has the advantages that the proportion of utilizing the clean energy and renewable energy sources is increased, the utilization efficiency of water resources is improved, and environment protection is promoted.

Description

High dam backbone reservoir increases the method regulating storage capacity and generating compensation benefit

Technical field

The invention belongs to power station combination accessory technical field, being specifically related to a kind of high dam backbone reservoir increases the method regulating storage capacity and generating compensation benefit.

Background technology

Water power is important routine, clean, regenerative resource, cascade hydropower in electrical network flexible operation, reliability is high, running cost is low.In River System Hydropower cascade development, backbone reservoir is the part of wherein most critical, directly has influence on the performance of whole River System Hydropower, layout, scale and economic benefit etc., be also simultaneously coordinate to flood, the important ring of social environment and ecological environment.

Along with the development and progression of society, under the condition that large population base, limited, the people's welfare index desired value of existence regional space improve constantly, the relation of construction of hydropower facilities and expropriation of land, ecological environment, social influence etc. has been shown great attention to and has been become increasingly conspicuous.

Build backbone reservoir or balancing reservoir, relatively many flooding and ecological environment certainly will be related to, in current water-power management and engineering design, balancing reservoir set up and scale is affected largely.

Under above-mentioned many factors, for reducing reservoir to the impact of society, environment etc., be first regulate the dimension-limited of storage capacity, while unit storage capacity need the increase such as height of dam, total investment of engineering; The economic indicator of corresponding power station and step also will reduce more in the past.

For the backbone reservoir of high water head dam, original conventional design is owing to being subject to the restrictions such as hinge intake metal construction, hydraulic turbine operation stability and safety, dead water level is higher, and most reservoir capacity can not be utilized, and the benefit of corresponding reservoir can not be played preferably.

Summary of the invention

The object of the invention is to make full use of and determine reservoir, increase regulating power, improve the quality of power supply in each power station, downstream, generated energy and economic benefit simultaneously, provide a kind of high abutment reservoir to increase the method regulating storage capacity and generating compensation benefit.

The present invention is that the increase of a kind of like this high dam backbone reservoir regulates the method for storage capacity and generating compensation benefit: it sets a limit level of dead water below former dead water level, thus increase dam safety evaluation storage capacity and increase withered phase available water and each power station, downstream benefit newly; Corresponding water turbine set and corresponding generating system by piloting water can be set up between this limit level of dead water to former dead water level, increase the power benefit in this power station; Newly-increased withered phase available water also can establish drainage gallery or the downward liberation water of newly-increased drainage gallery with this power station.

Along with basin and the cascade development of water power, have many rivers, its leading power station and the total gas-to electricity head of downstream stage can reach more than 1000m, and the compensation benefit of backbone reservoir is very considerable, and the present invention the construction investment that increases newly be only generating system by piloting water part.Compared with prior art, do not need increase dam investment and flood impact etc., the good economy performance of its new returns output investment ratio, be conducive to improving the performance of cascade hydropower and power benefit, be conducive to cleaning simultaneously, the utilization of regenerative resource.

Accompanying drawing explanation

Fig. 1 is technical schematic diagram of the present invention.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail.

See Fig. 1, for most of reservoir, the adjustment storage capacity between normal pool level and former dead water level can be used for generating electricity, the adjustment storage capacity one namely shown in figure.

The level of dead water of conventional hydropower station reservoir affects by many-side usually, mainly contains two aspects to engineering: the ratio of the maximal head that the first hydraulic turbine normally runs and minimum head limits, and is generally no more than 1.6; It two is pressure head restrictions that head gate moves that water normally runs, and by the present art, the depth displacement of level of dead water and normal pool level may not exceed 90m.

And at the present art, the maximum height of dam of reservoir dam can reach about 310m, below visible level of dead water, unemployed storage capacity is also very large.

Because the present invention is applicable to backbone reservoir, and the downstream water power station that backbone reservoir is correlated with can utilize total productive head very large, when the following storage capacity of former dead water level is larger, can try every possible means to develop.The present invention is exactly the storage capacity how utilizing below this level of dead water further.

The first step of the present invention just newly establishes a limit level of dead water below former dead water level, correspondingly just adds adjustment storage capacity, i.e. newly-increased adjustment storage capacity two shown in figure; Second step implements drainage gallery exactly, this drainage gallery can be adapted to run between this limit level of dead water ~ former dead water level set up water turbine set and corresponding generating system by piloting water, may also be other drainage galleries.

To head gate, the hydraulic pressure that can bear due to hydrostatic dash is obviously greater than dynamic water running, and this is just for the invention provides design basis.Regulate storage capacity one can be utilized by former turbine-generator units routine, the turbine-generator units regulating storage capacity second can be increased newly by the present invention utilizes or drainage gallery sluices.

Because backbone reservoir has increased withered phase available water newly, by the generating in each power station, downstream, the step compensation benefit of backbone reservoir just can be achieved.

Certainly, more than just embody rule example of the present invention, the technical scheme that the present invention also has other embodiment, all employings to be equal to replacement or equivalent transformation to be formed, all within protection domain of the presently claimed invention.

Claims

1. a high dam backbone reservoir increases the method regulating storage capacity and generating compensation benefit, it is characterized in that: below former dead water level, set a limit level of dead water, thus increase the adjustment storage capacity of reservoir, the withered effect of rich benefit is stored by reservoir, increase withered phase available water, increase the generating compensation benefit in each power station, downstream simultaneously.

2. high dam backbone reservoir according to claim 1 increases the method regulating storage capacity and generating compensation benefit, it is characterized in that: set up water turbine set and corresponding generating system by piloting water that one can run between this limit level of dead water ~ former level of dead water, utilize newly-increased withered phase available water, increase the power benefit in this power station.

3. high dam backbone reservoir increases the method regulating storage capacity and generating compensation benefit according to claim 1, it is characterized in that: newly-increased withered phase available water, also can establish drainage gallery or the downward liberation water of newly-increased drainage gallery with this power station.