CN102953913A - Upper liquid accumulation system for liquid gravitational potential energy storage power station - Google Patents

Upper liquid accumulation system for liquid gravitational potential energy storage power station Download PDF

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Publication number
CN102953913A
CN102953913A CN2011102547851A CN201110254785A CN102953913A CN 102953913 A CN102953913 A CN 102953913A CN 2011102547851 A CN2011102547851 A CN 2011102547851A CN 201110254785 A CN201110254785 A CN 201110254785A CN 102953913 A CN102953913 A CN 102953913A
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CN
China
Prior art keywords
liquid
potential energy
gravitational potential
hold
liquid accumulation
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CN2011102547851A
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Chinese (zh)
Inventor
南寅
王立昌
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首瑞(北京)投资管理集团有限公司
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Priority to CN2011102547851A priority Critical patent/CN102953913A/en
Publication of CN102953913A publication Critical patent/CN102953913A/en

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    • Y02E10/22
    • Y02E60/17
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/50Energy storage in industry with an added climate change mitigation effect

Abstract

The invention relates to an upper liquid accumulation system for a liquid gravitational potential energy storage power station. The upper liquid accumulation system comprises liquid accumulation containers, a pipeline, a valve, a monitoring control device, an anti-freezing and deicing facility and a mountain body, wherein the upper liquid accumulation system is positioned on the mountain body; each liquid accumulation container is a closed or semi-closed tank body located on a foundation; when the ground is bumpy, each liquid accumulation container can adopt a closed or semi-closed tank body structure which is supported by a support so as to be suspended on the ground; a liquid level monitoring device is arranged on each container; the containers are connected through the pipeline; the valve is arranged on the pipeline; the monitoring control device controls inflow and outflow of liquid and liquid level in each container by controlling opening and closing of each valve; the upper liquid accumulation system is provided with the anti-freezing and deicing facility; during a power load valley period, the liquid in a lower liquid accumulation device is lifted to the liquid accumulation container, and energy is stored; and during a power load peak period, the liquid orderly flows out of each liquid accumulation container through the pipeline under the coordination of the monitoring control device, a power generation device is driven, and the gravitational potential energy of the liquid is converted into kinetic energy. The upper liquid accumulation system is large in energy storage scale and low in requirements on terrain and geology conditions.

Description

Hold the liquid system in the liquid gravitational potential energy storage station

Technical field

The present invention relates to a kind of liquid gravitational potential energy storage station on hold the liquid system, belong to the storage station field.

Technical background

Term definition-zero potential energy plane: in the expression E=mgh of gravitational potential energy, because height h is relative, so the numerical value of gravitational potential energy also is relative.Certain object has gravitational potential energy mgh, and this namely gets the height of this horizontal plane and do zero with respect to some horizontal planes, and when object was positioned on these reference plane, gravitational potential energy was zero, therefore was called zero potential energy plane.

Along with the development of China's industrialized level and the increase of people's lives electricity consumption, the peak-valley difference of electrical network power load is more and more large, and along with wind-powered electricity generation, photovoltaic generation etc. has intrinsic wave properties and intermittent new energy are incorporated into the power networks on a large scale, how to guarantee that the stable operation of electrical network has become a huge challenge.China has determined that take coal as main energy general layout following electric power installation will be take Coal-fired Thermal Power as main in consisting of, but the existing fired power generating unit of China not only adjustment capability is limited, and adjust to exert oneself and also can cause adverse effect to safety and the life-span of equipment; Although conventional hydropower has certain peak modulation capacity, be subjected to season and weather influence larger.Compare with other technology, liquid gravitational potential energy storage station not only has good peak modulation capacity, can also consume electric energy as load in the low ebb phase, has the paddy of filling out function, liquid gravitational potential energy storage station also has the functions such as frequency modulation, phase modulation, emergency use simultaneously, therefore becomes the adjustment means that extensively adopt countries in the world.

The basic principle of liquid gravity storage station is with pump liquid to be extracted into the storehouse from lower storehouse in the electric load low ebb phase, is that the gravitational potential energy of liquid stores by this energy carrier of liquid with electric energy conversion; In the network load peak period, the liquid in the release in the storehouse, the hydraulic shock impeller makes its rotation, and impeller drives generator set and generates electricity.Because glassware for drinking water has wide material sources, with low cost, advantage that correlation technique is ripe, so pumped storage becomes widely used a kind of liquid gravity energy accumulating technique.From Switzerland's First pumped storage power station in 1882 was set up, technique was constantly developed, and pumped storage power station partly is comprised of Shang Ku, Xia Ku, Reversible Pump-Turbine group and pipeline, factory building etc. usually.

Although pumped storage power station is gone through the development in over one hundred year, when implementing, reality still exists variety of issue, and the addressing of especially going up the storehouse causes very large obstruction with the popularization of constructing to pumped storage power station:

A) terrian condition requires high.Usually the upper storehouse of pumped storage power station is built by manually enclosing, and lower storehouse then utilizes natural river course, lake, bay or utilizes the reservoir that has built up.For forming certain storage capacity, highland, place, upper storehouse must have enough areas; For obtaining high head, the height above sea level at place, upper storehouse is high as far as possible; Be control engineering cost, the horizontal equivalent between Shang Ku and the lower storehouse is as far as possible little.These conditions have limited the increase of pumped storage capacity so that addressing difficulty in power station increases.

B) Geological Condition Requirement is high.Because pipeline and the factory building of existing pumped storage power station are arranged on underground more, and pipeline is affected by high hydraulic pressure and water impact and infiltration, therefore require geological condition will be suitable for tunnel construction, simultaneously for reducing the accumulation of energy loss, also require upper storehouse will have good seepage capability.This has limited the popularization of pumped storage power station just so that the addressing difficulty in power station further increases.

C) difficulty of construction is large.The pipeline of existing pumped storage power station and factory building all are positioned at underground, and the complex geological conditions condition has all proposed very high requirement to workmen and equipment; In when operation, upper Reservoir Water Level is violent, and the suffered stress of waterwork in therefore upper storehouse is acute variation thereupon also, all is huge test to the side slope in upper storehouse and design and the construction of seepage control project; Along with improving constantly of pumped storage power station head, the withstand voltage and antiseepage of pressure duct has also proposed very high requirement to unit in charge of construction.

The problem of the objective realities such as addressing difficulty, difficulty of construction are high, long in time limit has limited pumped storage power station the applying of China, and has affected the implementation of strategies of electrical network peak load shifting.Therefore be badly in need of seeking a kind of effective technological scheme, reduce the engineering difficulty of extensive accumulation of energy, for Security, stability and the Economy that improves whole electric power system provides technical foundation.

Summary of the invention

In view of above-mentioned, the present invention aim to provide a kind of energy storage scale large, to landform and the low liquid gravitational potential energy storage device of Geological Condition Requirement.

Purpose of the present invention is achieved through the following technical solutions:

Hold the liquid system in a kind of liquid gravitational potential energy storage station, comprise some liquid-accumulating containers, pipeline, valve, monitor controller, antifreeze and deicing facility, massif.

On hold the liquid system and be positioned on of being higher than zero potential energy plane or several the massifs.Lineament according to massif, when ground is easy to when smooth, liquid-accumulating container can be sealing or the semiclosed tank body that is seated on the ground, when the rugged difficult processing in ground, liquid-accumulating container can adopt by shore supports and get up to be suspended from above the ground sealing or semiclosed tank structure, container is provided with level monitoring device, connects by pipeline between the container, and pipeline is provided with valve.Monitor control system is by the inflow and outflow of the open and close controlling liquid of each valve of control and the liquid level in each container.On hold the liquid system and be provided with antifreeze and the deicing setting, cross when low when ambient temperature, prevent from or eliminate because of liquid the phase transformation damage equipment occurring at low temperatures or affecting the problem such as flow characteristic.

In the electric load low ebb phase, with the electric energy driven pump liquid in the lower liquor storage device being hoisted promotes, on hold the liquid system the switching of detection control apparatus by control valve make liquid reasonably enter each autonomous container, realize the storage of energy.

In the electric load peak period, liquid flows out from each autonomous container in order via pipeline under the coordination of the monitor control system that holds the liquid system, drives electricity generating device, and the gravitational potential energy of liquid is converted to kinetic energy.

The beneficial effect that technical solution of the present invention is brought is as follows:

At first, the present invention utilize that some containers form on hold the liquid system and carry out the liquid gravitational potential energy storage, reduced landform, Geological Condition Requirement and difficulty of construction.Prior art need to be carried out a large amount of earthworks and be built the storehouse, and the long-pending restriction that is subject to landform of upper storage capacity, adopt some containers to carry out distributed liquid storage and then need not to carry out a large amount of earthworks, requirement to geologic structure also reduces greatly, can effectively expand the scope of liquid gravitational potential energy storage station addressing.The simultaneously design of the large capacity storage tank of normal pressure and processing are simple, for example 5000m 3The water at atmospheric pressure storage tank duration only be about 15 days, and construction technical requirement is low, equipment is simple.

Further, the present invention adopts container to carry out liquid gravitational potential energy storage, can effectively solve the energy loss that liquid evaporation, seepage cause, and is easy to control sandstone etc. to the wearing and tearing of equipment, extension device life-span.Existing upper storehouse is owing to be the uncovered peviform space of excavating at massif, therefore can't avoid causing owing to the evaporation of moisture the loss of energy, while is owing to the pressure of a large amount of water bodys in the upper storehouse, the towards periphery infiltration of rock stratum of moisture is also comparatively serious in the storehouse, monitoring according to Ming Tombs, Beijing liquid gravitational potential energy storage station, adopt after the normal operation of upper water reservoir tank of reinforced concrete panel antiseepage, survey maximum Leckage winter and be 713L/s in 1998,1999 is 694L/s, 2000 is 563L/s, calendar year 2001 is 433L/s, and the loss of moisture must bring the loss of energy.The present invention utilizes container to carry out liquid storage, selects effectively to solve evaporation and the leakage problems of liquid by rational structural design and material, has also avoided that sandstone is driven the wear problem that equipment is produced in the body of storehouse by current simultaneously.

At last, the present invention adopts, and the distributed liquid scheme of holding has reduced destruction to massif environment, and can double as the iirigation water source of green barren hill, has the advantage of achieving many things at one stroke.

Description of drawings

Fig. 1 is liquid gravitational potential energy energy-storage system schematic representation;

Fig. 2 is a kind of tank structure figure;

Fig. 3 is another kind of tank structure figure.

Embodiment

The present invention relates to a kind of liquid gravitational potential energy storage station on hold the liquid system, comprise liquid-accumulating container, pipeline, valve, monitor controller, antifreeze and deicing facility, massif.Describe in detail below in conjunction with accompanying drawing.

As shown in Figure 1, holding the liquid system on is comprised of to pipeline 6, generator set 7 etc. lower liquor storage device 1, pump 2, liquid transfer container 3, massif 4, closed pot for storing up liquid 5, liquid-mixing.Only provide basic structure among Fig. 1, according to the needs of operational efficiency and carrying out safety backup, many circuit parallel runnings are set during actual motion.

Realize in the existing storehouse of lower liquor storage device utilization body, lake, to reduce construction amount, to reduce construction investment.In the electric load low ebb phase, the liquid in the lower liquor storage device rises to the closed pot for storing up liquid that is arranged in the massif eminence via pump and liquid transfer container, and this moment, the system cost electric energy obtained liquid gravitational potential energy.What present embodiment was selected is the pump of medium lift high flow capacity, solves the problem of lift deficiency by multistage extracting.Closed pot for storing up liquid adopts the vault storage tank of present technology maturation, adopt the Ordinary Steel plate sheet welding to form, the inside and outside epoxy resin corrosion resistant coating of brushing is to improve service life of equipment, and according to the local climate condition, tank body and pipeline etc. can arrange the supporting facility such as thermal insulation layer, deicing equipment.Tank body is provided with the telemetering type level meter, for detection control apparatus provides real-time liquid level height data.

According to precipitous situation and the surface state of massif, if the slow condition of thicker soil, the gradient can adopt rammer soil base form shown in Figure 2.Choose suitable position at massif 102, ground grading and compacting form rams soil zone 103, then tank body 101 is positioned over and rams on the soil, the load-bearing of this structure is directly born by ground, therefore can reduce tank bottom material and processing technology requirement, be beneficial to the saving cost, reduce difficulty of construction.If the few soil of the precipitous or many stones of the massif gradient then can adopt column support type structure shown in Figure 3.Pillar 202 1 ends firmly are fixed in the massif 203, and the other end is connected with storage tank 201, and the load-bearing of this structure is born by pillar, and the strength of materials has certain requirement, but very high to the adaptability of landform, and the pipe laying space between the storage tank is larger, constructability.

Connect to pipeline by liquid-mixing between the closed pot for storing up liquid, realize the control of flow direction and flow by the switching of valve.By formulating rational management valve strategy, make when holding liquid from the tank body of height lower and begin perfusion, begin discharging from the tank body of height higher position during tapping, it is poor and cause equipment working condition abominable to avoid tank body control valve both sides to produce excessive pressure, effectively prolongs system's service life.

With single tank diameter 23m, height 23m calculates, and the volume of single storage tank is 9551m 3, according to actual volume 9000m 3Calculate, 100 storage tanks can hold liquid 900,000 m 3If the height difference between storage tank and lower water storing device is 400m, make water then can store the electric energy of about 900,000 kWh as accumulation of energy liquid.

In the electric load peak period, liquid in the storage tank is discharged via pipeline, the generator set of flowing through, the gravitational potential energy of liquid is converted to electric energy, for taking into account between the amplitude of exerting oneself and generator set efficiency area, adopts the pattern of the parallel generating of single-stage and multistage generator set, when the processing amplitude requirement is low, mainly generate electricity by multistage generator set, when electrical network needed a large amount of power supply, each unit is with all strength output all.Liquid after the acting flows back to lower device for storing liquid, waits for entering next time accumulation of energy circulation.

What need statement is; above-described embodiment only is used for that the present invention will be described but not limits the invention; therefore; for a person skilled in the art; in the situation that does not deviate from spirit and scope of the invention, it is carried out various apparent changes, all should be within protection scope of the present invention.

Claims (10)

  1. A liquid gravitational potential energy storage station on hold the liquid system, it is characterized in that:
    On hold the liquid system and formed by liquid-accumulating container, stand on the mountain.
  2. Liquid gravitational potential energy as claimed in claim 1 storage station on hold the liquid system, it is characterized in that:
    On hold the liquid system and formed by a plurality of liquid-accumulating containers.
  3. Liquid gravitational potential energy as claimed in claim 2 storage station on hold the liquid system, it is characterized in that:
    A plurality of liquid-accumulating containers are arranged on the same massif or are arranged on the different massifs.
  4. Liquid gravitational potential energy as claimed in claim 2 storage station on hold the liquid system, it is characterized in that:
    Connected by pipeline between a plurality of liquid-accumulating containers, be used for the circulation of liquid.
  5. 5. as holding the liquid system in the described liquid gravitational potential energy of one of the claim 1-4 storage station, it is characterized in that:
    On hold the liquid system and have monitor controller, be used for the liquid level height in the turnover of control liquid and each liquid-accumulating container.
  6. 6. as holding the liquid system in the described liquid gravitational potential energy of one of the claim 1-4 storage station, it is characterized in that:
    On hold the liquid system and have insulation and deicing facility, for preventing and eliminating that liquid undergoes phase transition under the cryogenic conditions.
  7. Liquid gravitational potential energy as claimed in claim 5 storage station on hold the liquid system, it is characterized in that:
    Liquid-accumulating container is the top seal structure.
  8. Liquid gravitational potential energy as claimed in claim 7 storage station on hold the liquid system, it is characterized in that:
    The bottom of liquid-accumulating container directly is seated on the ground, and perhaps liquid-accumulating container is by shore supports, and the bottom is suspended from above the ground.
  9. Liquid gravitational potential energy as claimed in claim 6 storage station on hold the liquid system, it is characterized in that:
    Liquid-accumulating container is the top seal structure.
  10. Liquid gravitational potential energy as claimed in claim 9 storage station on hold the liquid system, it is characterized in that:
    The bottom of liquid-accumulating container directly is seated on the ground, and perhaps liquid-accumulating container is by shore supports, and the bottom is suspended from above the ground.
CN2011102547851A 2011-08-31 2011-08-31 Upper liquid accumulation system for liquid gravitational potential energy storage power station CN102953913A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143365A (en) * 1980-04-08 1981-11-09 Saburo Hoshino Large hydraulic power plant utilizing elevation head of mountain rivers
CN101240670A (en) * 2007-02-07 2008-08-13 秦国光 Soft reservoir
CN101639027A (en) * 2008-07-31 2010-02-03 王首焱 Multilevel transformation method of water from gravitational potential energy into power and method for increasing and decreasing temperature by water
CN101656423A (en) * 2009-09-29 2010-02-24 河北农业大学 Light-wind-water complementary type water pumping and energy storing power generation peak adjusting device
CN201851266U (en) * 2010-11-24 2011-06-01 中国科学院工程热物理研究所 Miniature water-pumping energy-storage system
CN202417800U (en) * 2011-08-31 2012-09-05 首瑞(北京)投资管理集团有限公司 Upper liquid storage system of liquid gravitational potential energy storage power station

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143365A (en) * 1980-04-08 1981-11-09 Saburo Hoshino Large hydraulic power plant utilizing elevation head of mountain rivers
CN101240670A (en) * 2007-02-07 2008-08-13 秦国光 Soft reservoir
CN101639027A (en) * 2008-07-31 2010-02-03 王首焱 Multilevel transformation method of water from gravitational potential energy into power and method for increasing and decreasing temperature by water
CN101656423A (en) * 2009-09-29 2010-02-24 河北农业大学 Light-wind-water complementary type water pumping and energy storing power generation peak adjusting device
CN201851266U (en) * 2010-11-24 2011-06-01 中国科学院工程热物理研究所 Miniature water-pumping energy-storage system
CN202417800U (en) * 2011-08-31 2012-09-05 首瑞(北京)投资管理集团有限公司 Upper liquid storage system of liquid gravitational potential energy storage power station

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Application publication date: 20130306