CN202034791U - Electric-power energy storing device - Google Patents

Electric-power energy storing device Download PDF

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Publication number
CN202034791U
CN202034791U CN2011200860565U CN201120086056U CN202034791U CN 202034791 U CN202034791 U CN 202034791U CN 2011200860565 U CN2011200860565 U CN 2011200860565U CN 201120086056 U CN201120086056 U CN 201120086056U CN 202034791 U CN202034791 U CN 202034791U
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energy
hydrogen
storage
fuel cell
power
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Expired - Lifetime
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CN2011200860565U
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许世森
刘明义
程健
徐越
王保民
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Huaneng Group Technology Innovation Center Co Ltd
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Huaneng Clean Energy Research Institute
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    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The utility model discloses an electric-power energy storing device, which belongs to the electrochemical energy storing technology. The device mainly consists of an electrolyzed water hydrogen production system, a hydrogen storing system, an oxygen storing system, a water storing system, an alkaline fuel cell power generating system, an AC/DC (alternating current/direct current) converting system, a DC/AC (direct current/alternating current) converting system and a corresponding controlling system; electrical energy is directly converted into chemical energy, and the chemical energy is stored in the hydrogen storing system and the oxygen storing system respectively; and the stored chemical energy of the hydrogen and the oxygen can be converted into electrical energy by the alkaline fuel cell power generating system for electric power supplying at the load peak of an electricity grid. The water generated by the fuel cell power generating process can be recycled for the water consumption of the whole device in the electrolytic process; the device has the superiorities that the capacity is large, the service life is long, the cost is low, the device is environmentally friendly and the like; and the technology maturity degree of all major components is high, and the device has an extremely wide application prospect in the electric power field.

Description

A kind of power energy storing device
Technical field
The utility model belongs to electric power energy storage field, relates to by water electrolysis hydrogen production system, Chu Qing and storage oxygen system and fuel cell generation, realizes the electrochemical energy storage technology of electrical power storage, relates in particular to a kind of power energy storing device.
Background technology
Along with increasing rapidly of national economy, vigorous day by day to the demand of the energy, energy shortage and the problem of environmental pollution that fossil energy produced are becoming increasingly acute.The new forms of energy resource potential is big, sustainable use, satisfy energy demand, improve energy resource structure, reduce environmental pollution, aspect such as promote economic development brought into play important function, caused the extensive concern of international community.Under the dual-pressure of energy security and environmental protection, technology renewable energy power generations such as maturation, the wind power generation that possesses scale exploitation condition and solar power generation has relatively worldwide obtained develop rapidly.Particularly, the industry size of wind power generation and solar power generation and market-oriented degree improve year by year in recent years, have also expedited the emergence of the development of intelligent grid technology.
The own characteristic of wind energy and solar energy resources has determined wind energy and solar power generation to have unsteadiness and discontinuity, is typical randomness, intermittent power supply.The predictability that is difficult to owing to wind-powered electricity generation and solar power generation, make it adjust supply of electric power according to actual electric power workload demand, need at present to adapt to the requirement that it generates electricity by way of merging two or more grid systems, make generation of electricity by new energy be difficult to become main force's power supply, only can use as accessory power supply by the adjusting of fossil energy generating; Secondly, the unsteadiness of wind-powered electricity generation and solar power generation has a significant impact its all many-side such as safe and stable operation of generating electricity by way of merging two or more grid systems on a large scale to electrical network.These have all become the big obstacle of present restriction wind-powered electricity generation and the extensive development of solar power generation.
Energy-storage system has dynamic absorption energy and the steady in good time characteristics that discharge, and can effectively remedy the shortcoming of wind-powered electricity generation and solar power generation intermittence, fluctuation, improves the controllability of electric field power output, promotes the level of stability of generating.Introduce energy-storage system in wind-powered electricity generation and solar power generation, can effectively suppress power fluctuation, smooth output voltage improves the quality of power supply, is key technology and the main flow mode that guarantees wind-powered electricity generation and solar power generation grid-connecting operation.
At present extensive electric power energy storage technology is " bottleneck " of restriction renewable energy power generation, also is " bottleneck " of restriction intelligent grid development.Extensive electric power energy storage technology development is changed the development of the energy and electric power and is had material impact, might change following production of energy, transportation and occupation mode.
According to power conversion form difference, energy storage technology can be divided into: mechanical energy storage (as pumped storage, compressed-air energy storage, flywheel energy storage etc.); Electromagnetism energy storage (as super conductive magnetic storage energy, ultracapacitor etc.); Electrochemical energy storage (as lead-acid battery, lithium ion battery, sodium-sulphur battery, flow battery etc.).Pumped storage and compressed-air energy storage are subjected to the region limitations affect very big; The duration of flywheel energy storage, super conductive magnetic storage energy and ultracapacitor energy storage is shorter, generally is no more than 15min.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of power energy storing device, and it is big to have energy density, longer duration, and the advantage that not limited by the region.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of power energy storing device comprises:
AC/DC transformation system III, the electric energy that needs are stored is converted to direct current energy by AC energy;
Water electrolysis hydrogen production system IV, the direct current energy that AC/DC transformation system III is changed is converted to chemical energy, discharges pure hydrogen and pure oxygen;
Hydrogen storage system V stores direct current energy and is converted to the hydrogen that generates in the process of chemical energy;
The storage oxygen VI of system stores direct current energy and is converted to the oxygen that generates in the process of chemical energy;
Fuel cell generation VII is converted to direct current energy with chemical energy hydrogen and oxygen among hydrogen storage system V and the storage oxygen VI of system;
Water storage system X, stored chemical energy hydrogen and oxygen are converted to the water that generates in the process of direct current energy and use for conventional electrolysis water hydrogen generating system IV;
DC/AC transformation system VII is connected to the grid after the direct current energy of fuel cell generation VII conversion is converted to AC energy.
Wherein, the described energy source of AC/DC transformation system III that is input to is in wind generator system, solar power system, thermal power generation system, hydroelectric power system, nuclear power station or operating electrical network.Described water electrolysis hydrogen production system IV is conventional electrolyzed alkaline water hydrogen generating system, pure water electrolytic hydrogen production casing, proton exchange membrane water electrolysis hydrogen producing system or soild oxide water electrolysis hydrogen producing system.
Described fuel cell generation VII is alkaline fuel cell electricity generation system, phosphoric acid fuel cell electricity generation system, melting carbonate fuel cell generation system or solid oxide fuel cell power generating system, and fuel cell operation adopts pure hydrogen/pure oxygen operating fuel.
Described hydrogen storage system V and the storage oxygen VI of system and the storage of employing normal pressure, the storage of middle pressure or high pressure storage, pressure limit 0~80MPa.
Described water electrolysis hydrogen production system IV and fuel cell generation VII both can time-sharing works, promptly charge and the discharge process independent operating, realize that extensive electric power stores, can work simultaneously again, dynamically absorb energy and steady in good time release, the fluctuation of renewable energy power generations such as effectively level and smooth solar energy, wind energy is improved the controllability of electric field power output, promotes the level of stability of generating.
The utility model compared with prior art has the following advantages:
1) capacity is big: the batteries to store energy technology does not still possess the condition of applying at extensive electric power energy-storage system at present, its reason is except that cost factor, mainly be because the batteries to store energy capacity is lower, this is because the active material of storage battery is enclosed on the positive/negative plate of inside battery, consider the factor such as preparation technology, fail safe of storage battery, its activity substance filling amount has certain limitation, therefore, the stored energy capacitance of storage battery is limited, is difficult to satisfy electric power energy storage field to the jumbo requirement of energy-storage system.And extensive power energy storing device of the present utility model, active material hydrogen and oxygen adopt the outside mode that stores, be stored in respectively in hydrogen storage system and the storage oxygen system, the stored energy capacitance of this energy storage device is only determined by the volume and the pressure of hydrogen storage system and storage oxygen system, by increasing the volume and the pressure store of storage hydrogen and storage oxygen system, the stored energy capacitance of this power energy storing device can reach the stored energy capacitance of 10~1,000,000 kilowatt hours.
2) life-span is long, cost is low: the chief component of extensive power energy storing device of the present utility model: conventional electrolysis water hydrogen generating system IV technology maturation, and existing wide range of commercial application, cost is lower, and can reach 15 years its useful life; Alkaline fuel cell electricity generation system VII is successfully applied to U.S.'s Apollo Personnel investigation Program the earliest " Lunar Probe Project, u.s. space shuttle has flown 93 times with alkaline fuel cell so far.The subject matter of alkaline fuel cell is the poisoning effect of CO2, make alkaline electrolyte generate carbanion, to impacting in the efficient and useful life of battery, but in the utility model, the use pure hydrogen and the pure oxygen of alkaline fuel cell are fuel, can avoid the poisoning effect of CO2 fully.Along with the development of alkaline fuel cell technology, surpass 20,000 times its useful life under pure hydrogen and pure oxygen environment at present, if move 5h calculating every day, then can reach its useful life more than 10 years with this energy storage device; Secondly alkaline fuel cell can not use noble metal catalysts such as Pt, and battery material such as its barrier film is cheap, makes that the cost of alkaline fuel cell is very low, and is very suitable to the electricity generation system in the extensive power energy storing device of the utility model.
3) environmental friendliness: the extensive power energy storing device input energy of the present utility model is electric energy, store through converting electrical energy into chemical energy (hydrogen and oxygen), directly be converted to electric energy in peak period, network load peak by chemical energy and export electrical network to, consume in the whole process with product and be water, the recycling closed operation that realizes this power energy storing device by water can not have a negative impact to surrounding environment; And the each several part composition material of this power energy storing device all can not have a negative impact to environment yet.
In general, extensive power energy storing device of the present utility model has advantages such as big capacity, long-life, low cost and environmental friendliness, and the technology maturity of its each chief component is higher, has extremely wide application prospect at power domain.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the pairing hydrogen storage system volume of the different stored energy capacitances of the present invention, and wherein: abscissa is a stored energy capacitance, unit ten thousand kilowatt hours; Ordinate is the volume of hydrogen storage system, the unit cubic meter.
Fig. 3 is the pairing storage oxygen of the different stored energy capacitances of the present invention system bulk, and wherein: abscissa is a stored energy capacitance, unit ten thousand kilowatt hours; Ordinate is the volume of storage oxygen system, unit cubic meter.
Embodiment
Describe execution mode of the present utility model in detail below in conjunction with drawings and Examples.
As shown in Figure 1, the utility model is a kind of power energy storing device, comprises
AC/DC transformation system III, the electric energy that needs are stored is converted to direct current energy by AC energy;
Water electrolysis hydrogen production system IV, the direct current energy that AC/DC transformation system III is changed is converted to chemical energy, release hydrogen and oxygen;
Hydrogen storage system V stores water electrolysis hydrogen production system IV and is converted to the hydrogen that generates in the process of chemical energy at direct current energy;
The storage oxygen VI of system stores water electrolysis hydrogen production system IV and is converted to the oxygen that generates in the process of chemical energy at direct current energy;
Fuel cell generation VII is converted to direct current energy with chemical energy hydrogen and oxygen among hydrogen storage system V and the storage oxygen VI of system;
Water storage system X, storage of fuels battery generating system VII is converted to the water that generates in the process of direct current energy with chemical energy and uses for conventional electrolysis water hydrogen generating system IV;
DC/AC transformation system VII is connected to the grid after the direct current energy of fuel cell generation VII conversion is converted to AC energy.
The hypothesis design power is 10,000 kilowatts below, and stored energy capacitance is 10,000 kilowatts, then:
(1) alkaline fuel cell electricity generation system VII design, according to Fig. 1, extensive power energy storing device structure chart of the present utility model, because this power energy storing device rated power is 10,000 kilowatts, the rated power of corresponding alkaline fuel cell electricity generation system is 10,000 kilowatts, and general design adopts the mode of alkaline fuel cell module series connection to make fuel cell generation reach required rated power;
(2) Chu Qing V and the storage oxygen VI of system design, according to pairing storage hydrogen of the different stored energy capacitances of Fig. 2 and storage oxygen system bulk with Fig. 3 energy storage device, design storage hydrogen and the volume that stores up the oxygen system in this energy storage device, with alkaline fuel cell electricity generation system efficient is 70% calculating, and the volume that then stores up hydrogen and storage oxygen system only is respectively: 120m 3And 60m 3, the design pressure of wherein storing up hydrogen and storage oxygen system is 5MPa, and promptly actual required hydrogen and the amount of oxygen of this energy storage device is respectively: 6000Nm 3And 3000Nm 3
(3) water storage system X design is respectively according to actual required hydrogen and the amount of oxygen of above-mentioned energy storage device: 6000Nm 3And 3000Nm 3, the volume of required product water is 4.82m in the then corresponding running 3, consider that actual moving process will have the loss of part moisture content, so the volume of water storage system X is not less than 6m 3
(4) water electrolysis hydrogen production system IV design, actual demand amount according to energy storage device hydrogen and oxygen, and the time of energy storage device charging (electrolysis) process, and consider the actual electrolytic efficiency of water electrolysis hydrogen production system, determine the rated power and the actual hydrogen output of water electrolysis hydrogen production system.If charging (electrolysis) process time with this energy storage device is 2h, promptly can make it reach specified stored energy capacitance by this energy storage device being carried out the 2h charging, the actual electrolytic efficiency of water electrolysis hydrogen production system is 85%, and then the actual hydrogen output of water electrolysis hydrogen production system is 3000Nm 3/ h, rated power are 8400 kilowatts, and (the theoretical hydrogen output of one kilowatt of electrical power is 0.42Nm 3/ h).
(5) design and the type selecting of AC/DC transformation system III, DC/AC transformation system VIII, according to the requirement of being incorporated into the power networks of alkaline fuel cell electricity generation system VII rated power and electrical network IX, design DC/AC transformation system VIII, and carry out lectotype selection; According to the specific requirement of water electrolysis hydrogen production system IV rated power and solar energy, wind power generation field I or electrical network II, design AC/DC transformation system III, and carry out lectotype selection.
The concrete operation method of a kind of power energy storing device of the utility model:
(1) charging process: the network load low ebb phase with solar energy, wind power generation field I or electrical network II power storage in this energy storage device, the part of this process need control operation has: AC/DC transformation system III, water electrolysis hydrogen production system IV, water storage system X, hydrogen storage system V and the storage oxygen VI of system.Wherein AC/DC transformation system III and water electrolysis hydrogen production system IV all adopt modularized design to adapt to the charging process under the different input power;
(2) thermal energy storage process: after finishing charging process, the input electric energy is converted to chemical energy (hydrogen and oxygen), be stored in hydrogen storage system V respectively and store with storing up in the oxygen VI of system, because this storage process is a physical store, memory capacity and storage time all can be controlled flexibly;
(3) discharge process: the chemical energy in the network load peak period will be stored in this energy storage device (hydrogen and oxygen) is converted to electric energy by alkaline fuel cell electricity generation system VII, and send into electrical network by DC/AC transformation system VIII, to satisfy the need for electricity of network load peak period.The part of this process need control operation has: hydrogen storage system V, the storage oxygen VI of system, alkaline fuel cell electricity generation system VII, water storage system X, DC/AC transformation system VIII.Wherein alkaline fuel cell electricity generation system VII, DC/AC transformation system VIII all adopt modularized design to adapt to the discharge process under the different output power.
A kind of power energy storing device of the utility model not only can realize that extensive electric power stores by the independent operating of charging process and discharge process; Operation in the time of also can be by charging process and discharge process dynamically absorbs electric energy and steadily discharges in good time, and the fluctuation of renewable energy power generations such as effectively level and smooth solar energy, wind energy is improved the controllability of electric field power output, promotes the level of stability of generating.

Claims (9)

1. a power energy storing device is characterized in that, comprising:
AC/DC transformation system (III), the electric energy that needs are stored is converted to direct current energy by AC energy;
Water electrolysis hydrogen production system (IV), the direct current energy that AC/DC transformation system (III) is changed is converted to chemical energy, release hydrogen and oxygen;
Hydrogen storage system (V) stores direct current energy and is converted to the hydrogen that generates in the process of chemical energy;
Storage oxygen system (VI) stores direct current energy and is converted to the oxygen that generates in the process of chemical energy;
Fuel cell generation (VII) is converted to direct current energy with chemical energy hydrogen and oxygen in hydrogen storage system (V) and the storage oxygen system (VI);
Water storage system (X), stored chemical energy hydrogen and oxygen are converted to the water that generates in the process of direct current energy and use for conventional electrolysis water hydrogen generating system (IV);
DC/AC transformation system (VII) is connected to the grid after the direct current energy of fuel cell generation (VII) conversion is converted to AC energy.
2. a kind of power energy storing device according to claim 1, it is characterized in that the described energy source of AC/DC transformation system (III) that is input to is in wind generator system, solar power system, thermal power generation system, hydroelectric power system, nuclear power station or operating electrical network.
3. a kind of power energy storing device according to claim 1, it is characterized in that described water electrolysis hydrogen production system (IV) is conventional electrolyzed alkaline water hydrogen generating system, pure water electrolytic hydrogen production casing, proton exchange membrane water electrolysis hydrogen producing system or soild oxide water electrolysis hydrogen producing system.
4. a kind of power energy storing device according to claim 1, it is characterized in that described fuel cell generation (VII) is alkaline fuel cell electricity generation system, phosphoric acid fuel cell electricity generation system, melting carbonate fuel cell generation system or solid oxide fuel cell power generating system.
5. a kind of power energy storing device according to claim 1 is characterized in that, described fuel cell generation (VII) adopts hydrogen and oxygen fuel operation.
6. a kind of power energy storing device according to claim 1 is characterized in that, described hydrogen storage system (V) adopts normal pressure storage, the storage of middle pressure or high pressure storage, pressure limit 0~80MPa.
7. a kind of power energy storing device according to claim 1 is characterized in that, described storage oxygen system (VI) adopts normal pressure storage, the storage of middle pressure or high pressure storage, pressure limit 0~80MPa.
8. a kind of power energy storing device according to claim 1 is characterized in that, described water electrolysis hydrogen production system (IV) and fuel cell generation (VII) are worked simultaneously, and promptly charging and discharge process move simultaneously.
9. a kind of power energy storing device according to claim 1 is characterized in that, described water electrolysis hydrogen production system (IV) and fuel cell generation (VII) time-sharing work, i.e. charging and discharge process independent operating.
CN2011200860565U 2011-03-28 2011-03-28 Electric-power energy storing device Expired - Lifetime CN202034791U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102185328A (en) * 2011-03-28 2011-09-14 中国华能集团清洁能源技术研究院有限公司 Novel large-scale power energy storage device
CN103422112A (en) * 2013-06-21 2013-12-04 高幼苏 Method and system for preparing hydrogen and carrying out combined water supply and power supply
CN104659307A (en) * 2015-02-13 2015-05-27 中国华能集团清洁能源技术研究院有限公司 Rapidly-replaceable constant-temperature matrix type energy storage box
CN108511776A (en) * 2017-02-28 2018-09-07 沈新平 A kind of power generation and hydrogen manufacturing integrated dynamic system based on proton exchange membrane application
CN109473704A (en) * 2017-09-08 2019-03-15 徐煜 Fuel cell system
CN112226787A (en) * 2020-10-21 2021-01-15 阳光电源股份有限公司 Control method, device and system for startup and shutdown of hydrogen production system and storage medium

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102185328A (en) * 2011-03-28 2011-09-14 中国华能集团清洁能源技术研究院有限公司 Novel large-scale power energy storage device
CN103422112A (en) * 2013-06-21 2013-12-04 高幼苏 Method and system for preparing hydrogen and carrying out combined water supply and power supply
CN103422112B (en) * 2013-06-21 2016-12-28 高幼苏 A kind of method and system prepared hydrogen and carry out combined type water and electricity supply
CN104659307A (en) * 2015-02-13 2015-05-27 中国华能集团清洁能源技术研究院有限公司 Rapidly-replaceable constant-temperature matrix type energy storage box
CN104659307B (en) * 2015-02-13 2017-05-03 中国华能集团清洁能源技术研究院有限公司 Rapidly-replaceable constant-temperature matrix type energy storage box
CN108511776A (en) * 2017-02-28 2018-09-07 沈新平 A kind of power generation and hydrogen manufacturing integrated dynamic system based on proton exchange membrane application
CN109473704A (en) * 2017-09-08 2019-03-15 徐煜 Fuel cell system
CN112226787A (en) * 2020-10-21 2021-01-15 阳光电源股份有限公司 Control method, device and system for startup and shutdown of hydrogen production system and storage medium
CN112226787B (en) * 2020-10-21 2022-04-08 阳光电源股份有限公司 Control method, device and system for startup and shutdown of hydrogen production system and storage medium

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