CN104410171A - Energy storage method for smart power grid and apparatus adopted by method - Google Patents

Energy storage method for smart power grid and apparatus adopted by method Download PDF

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Publication number
CN104410171A
CN104410171A CN201410618230.4A CN201410618230A CN104410171A CN 104410171 A CN104410171 A CN 104410171A CN 201410618230 A CN201410618230 A CN 201410618230A CN 104410171 A CN104410171 A CN 104410171A
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CN
China
Prior art keywords
energy storage
valve
tank
air
energy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410618230.4A
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Chinese (zh)
Inventor
刘荷芳
李华
刘国敏
郭晓明
刘平心
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CHANGZHOU SUNHOME SOLAR WATER HEATER MANUFACTURE Co Ltd
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CHANGZHOU SUNHOME SOLAR WATER HEATER MANUFACTURE Co Ltd
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Application filed by CHANGZHOU SUNHOME SOLAR WATER HEATER MANUFACTURE Co Ltd filed Critical CHANGZHOU SUNHOME SOLAR WATER HEATER MANUFACTURE Co Ltd
Priority to CN201410618230.4A priority Critical patent/CN104410171A/en
Publication of CN104410171A publication Critical patent/CN104410171A/en
Pending legal-status Critical Current

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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
    • Y02E60/16Mechanical energy storage, e.g. flywheels or pressurised fluids

Abstract

The invention relates to an energy storage method for a smart power grid and apparatus adopted by the method. The apparatus includes an air energy-storage system and a high-temperature molten salt energy-storage system; the air energy-storage system is composed of a motor, a compressor, an air storage system, a heat exchanger and a turbine; air is compressed through the compressor and is stored in the air storage system; the high-temperature molten salt energy-storage system is composed of a hot tank, a superheater, an evaporator, a preheater, a cooling tank and a water storage tank; according to air energy storage and high-temperature molten salt energy storage, high-temperature molten salt is utilized to directly or indirectly heat high-pressure air so as to thermally expand the air, and thus, release efficiency can be greatly improved. With the energy storage method for the smart power grid and the apparatus adopted by the method adopted, intellectualization of the power grid can be realized, and renewable energy consumption and accommodating capacity and stable operation of the power grid can be improved.

Description

A kind of energy storage method for intelligent grid and device thereof
Technical field
The present invention relates to field of energy utilization, especially the air energy storage in the energy storage field of intelligent grid and the energy storage of high-temperature fusion salt.
Background technology
No matter to pass by or now, the catabiotic very major part in the world is all from the fossil fuel such as oil, coal, but the resource of these fossil fuels is very limited.On the other hand, traditional fossil energy can produce multiple pollutant when burning, and causes serious pollution to environment, and the carbon dioxide of releasing during fossil energy burning produces greenhouse effect, causes very large impact in the world.
In addition, the electric power of many hydroelectric stations, wind power station, photovoltaic plant is not fully utilized, and discards in vain, causes the serious waste of electric power.
China is at present in most area, and especially developed area, has implemented the policy of peak valley electricity charge wholesale price difference.Be exactly period 11 o'clock of 7 o'clock to evening in the morning, carry out high-order electricity price, greatly about 0.8 yuan ~ 1.45 yuan/kwh (area had is even higher).And period 7 o'clock of 11 o'clock to morning at night, carry out low level electricity price, substantially 0.2 yuan ~ 0.3 yuan/kwh (area had is even lower).So large price difference, by electric unit in order to encourage, use electric energy in the low power consumption period as much as possible, so both significantly can reduce the electric load of China's most area, significantly can improve again the efficiency of China's electricity usage exactly.
In recent years, the research and development of energy storage technology is subject to the attention of the departments such as various countries' energy, traffic, electric power, telecommunication always.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of energy storage method for intelligent grid and device thereof, utilize trough-electricity or wind-powered electricity generation, water power, photovoltaic electricity of abandoning carry out energy storage, the digestion capability of electrical network to regenerative resource can be promoted, realize Utilizing Energy Sources in Reason.
The technical solution adopted in the present invention is: a kind of energy storage method for intelligent grid, comprises independent air energy storage mode, independent high-temperature fusion salt energy storage mode and air and high-temperature fusion salt energy storage simultaneously mode;
Described independent air energy storage mode is: motor utilizes the electric energy of input to start compressor; Air delivers to caisson energy storage after entering the compression of overcompression machine, by gas temperature raising being expanded through over-heat-exchanger during exoergic, generates electricity finally by turbine;
Described independent high-temperature fusion salt energy storage mode is: utilize the fused salt in the electric energy heat hot tank of input, then utilize the water in water tank to enter preheater, evaporator and superheater and heated fused salt successively to carry out heat exchange and form superheated steam, and then pushing turbine generates electricity;
Described air and high-temperature fusion salt energy storage simultaneously mode are: independent air energy storage mode and independent high-temperature fusion salt energy storage mode work simultaneously.
In independent air energy storage mode of the present invention, heat exchanger and input, output connect heat-connecting can and cold tank respectively.
The electric energy of input of the present invention is trough-electricity or wind-powered electricity generation, water power, thermoelectricity, photovoltaic abandon electricity; The electric power that the trough-electricity that can effectively utilize electricity price cheap or power plant have more than needed, prevents unnecessary waste, reduces electric load, improve the efficiency of electricity usage.
Hot tank of the present invention and cold tank are single storage tank or multiple storage tank; Size according to stored energy capacitance is determined.
Device of the present invention, comprises air energy storage systems and high-temperature fusion salt energy-storage system; Described air energy storage systems is made up of motor, compressor, gas storage system, heat exchanger and turbine; Described motor, compressor, gas storage system, heat exchanger and turbine form independent compressed-air energy storage loop; Described high-temperature fusion salt energy-storage system is made up of hot tank, superheater, evaporator, preheater, cold tank and water tank; Described hot tank, superheater, evaporator, preheater, cold tank and water tank form independent high-temperature fusion salt tank circuit; Described hot tank and the connecting line of superheater are provided with the first valve; Described cold tank and the connecting line of preheater are provided with the 3rd valve; Input, the output of described heat exchanger connect heat-connecting can and cold tank respectively by the second valve and the 4th valve.
In first valve of the present invention, the second valve, the 3rd valve and the 4th valve, the first described valve and the 3rd valve are opened or the second described valve and the 4th valve is opened simultaneously or four valves are opened simultaneously simultaneously.By the control of valve, both having can be used alone air energy storage systems or be used alone high-temperature fusion salt energy-storage system also can two kinds of energy-storage systems merging use.
Operation principle of the present invention and process are: described motor, compressor, gas storage system, heat exchanger and turbine are connected to form air energy storage systems successively by pipeline; Described hot tank, superheater, evaporator, preheater, cold tank and water tank are connected to form high-temperature fusion salt energy-storage system successively by pipeline.
The invention has the beneficial effects as follows: the trough-electricity utilizing electricity price lower and the wind-powered electricity generation of surplus, water power, photovoltaic carry out energy storage, the fault offset will stored again during peak of power consumption, or be used for generating electricity again after the energy of storage is replaced, effectively utilize valley electricity or wind-powered electricity generation, water power, photovoltaic abandon electricity, reach the object that rational energyization utilizes.And air that is direct with high-temperature fusion salt or indirect high pressure, makes air rapid expanding thus improves release efficiency greatly.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
In figure: 1, motor; 2, compressor; 3, gas storage system; 4, heat exchanger; 5 turbines; 6, hot tank; 7, superheater; 8, evaporator; 9, preheater; 10, cold tank; 11, water tank; A, input electric energy; B, output electric energy.
Embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, air energy storage systems is made up of motor 1, compressor 2, gas storage system 3, heat exchanger 4 and turbine 5; Described motor, compressor, gas storage system, heat exchanger and turbine form independent compressed-air energy storage loop; Described high-temperature fusion salt energy-storage system is made up of hot tank 6, superheater 7, evaporator 8, preheater 9, cold tank 10 and water tank 11; Described hot tank, superheater, evaporator, preheater, cold tank and water tank form independent high-temperature fusion salt tank circuit; Described hot tank and the connecting line of superheater are provided with the first valve; Described cold tank and the connecting line of preheater are provided with the 3rd valve; Input, the output of described heat exchanger connect heat-connecting can and cold tank respectively by the second valve and the 4th valve.
Workflow of the present invention is:
Independent compressed-air energy storage loop:
Open valve b and valve d, valve-off a and valve c, motor 1 utilizes the electric energy A of input to start compressor 2, and air is compressed to gas storage system 3 heat energy storage via compressor 2 successively, then exports electric energy B during release heat energy through over-heat-exchanger 5 temperature raising to turbine 6.
Independent high-temperature fusion salt tank circuit:
Open valve a and valve c, valve-off b and valve d, utilize the fused salt in the electric energy A heat hot tank 6 of input, and the water in water tank 11 flows through preheater 9 successively, evaporator 8, superheater 7 are melted salt and are heated as superheated steam and then export electric energy B.
The loop of air and the energy storage simultaneously of high-temperature fusion salt:
Open valve a, valve b, valve c and valve d, one fuse salt flows through superheater 7, evaporator 8 and preheater 9 and the water in water tank 11 is heated as superheated steam then exports electric energy B; Another plume gives pressure-air temperature raising to heat exchanger 5, and pressure-air expanded by heating exports electric energy B by turbine 6.
The just the specific embodiment of the present invention described in above specification, various illustrating is not construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.

Claims (6)

1. for an energy storage method for intelligent grid, it is characterized in that: comprise independent air energy storage mode, independent high-temperature fusion salt energy storage mode and air and high-temperature fusion salt energy storage simultaneously mode;
Described independent air energy storage mode is: motor utilizes the electric energy of input to start compressor; Air delivers to caisson energy storage after entering the compression of overcompression machine, by gas temperature raising being expanded through over-heat-exchanger during exoergic, generates electricity finally by turbine;
Described independent high-temperature fusion salt energy storage mode is: utilize the fused salt in the electric energy heat hot tank of input, then utilize the water in water tank to enter preheater, evaporator and superheater and heated fused salt successively to carry out heat exchange and form superheated steam, and then pushing turbine generates electricity;
Described air and high-temperature fusion salt energy storage simultaneously mode are: independent air energy storage mode and independent high-temperature fusion salt energy storage mode work simultaneously.
2. a kind of energy storage method for intelligent grid as claimed in claim 1, is characterized in that: in described independent air energy storage mode, heat exchanger and input, output connect heat-connecting can and cold tank respectively.
3. a kind of energy storage method for intelligent grid as claimed in claim 1, is characterized in that: the electric energy of described input is trough-electricity or wind-powered electricity generation, water power, thermoelectricity, photovoltaic abandon electricity.
4. a kind of energy storage method for intelligent grid as claimed in claim 1, is characterized in that: described hot tank and cold tank are single storage tank or multiple storage tank.
5., as claimed in claim 1 for the device that the energy storage method of intelligent grid adopts, it is characterized in that: comprise air energy storage systems and high-temperature fusion salt energy-storage system; Described air energy storage systems is made up of motor, compressor, gas storage system, heat exchanger and turbine; Described motor, compressor, gas storage system, heat exchanger and turbine form independent compressed-air energy storage loop; Described high-temperature fusion salt energy-storage system is made up of hot tank, superheater, evaporator, preheater, cold tank and water tank; Described hot tank, superheater, evaporator, preheater, cold tank and water tank form independent high-temperature fusion salt tank circuit; Described hot tank and the connecting line of superheater are provided with the first valve; Described cold tank and the connecting line of preheater are provided with the 3rd valve; Input, the output of described heat exchanger connect heat-connecting can and cold tank respectively by the second valve and the 4th valve.
6. the device adopted for the energy storage method of intelligent grid as claimed in claim 5, it is characterized in that: in the first described valve, the second valve, the 3rd valve and the 4th valve, the first described valve and the 3rd valve are opened or the second described valve and the 4th valve is opened simultaneously or four valves are opened simultaneously simultaneously.
CN201410618230.4A 2014-11-05 2014-11-05 Energy storage method for smart power grid and apparatus adopted by method Pending CN104410171A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105680462A (en) * 2016-03-19 2016-06-15 林光琴 Energy storage and power generation system and power load peak operation control method
US9850883B1 (en) 2017-08-10 2017-12-26 Bajaura S.A. DE C.V. Apparatus and method for generating electricity from integrated air flows and thermal energy
CN107702086A (en) * 2017-10-24 2018-02-16 西安西热节能技术有限公司 A kind of peak regulation system and method using fuse salt heat accumulation
CN108457712A (en) * 2018-03-02 2018-08-28 中国科学院上海应用物理研究所 Molten salt reactor energy conversion system and energy transformation method
CN110506153A (en) * 2017-04-19 2019-11-26 株式会社神户制钢所 Compressed-air energy storage power generator and compressed-air energy storage electricity-generating method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10225018A (en) * 1997-02-04 1998-08-21 Enesaabu Kk Method and equipment for accumulating pressure during midnight
CN102518480A (en) * 2011-12-14 2012-06-27 华北电力大学 Compressed air energy storage and coal-fired boiler integrated power generation system
CN103090349A (en) * 2013-01-22 2013-05-08 江苏太阳宝新能源有限公司 Photo-thermal electricity-generating multi-medium vapor-generating method and system thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10225018A (en) * 1997-02-04 1998-08-21 Enesaabu Kk Method and equipment for accumulating pressure during midnight
CN102518480A (en) * 2011-12-14 2012-06-27 华北电力大学 Compressed air energy storage and coal-fired boiler integrated power generation system
CN103090349A (en) * 2013-01-22 2013-05-08 江苏太阳宝新能源有限公司 Photo-thermal electricity-generating multi-medium vapor-generating method and system thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105680462A (en) * 2016-03-19 2016-06-15 林光琴 Energy storage and power generation system and power load peak operation control method
CN105680462B (en) * 2016-03-19 2018-07-06 广州发展电力科技有限公司 Energy-storing and power-generating system and electric load wave crest progress control method
CN110506153A (en) * 2017-04-19 2019-11-26 株式会社神户制钢所 Compressed-air energy storage power generator and compressed-air energy storage electricity-generating method
CN110506153B (en) * 2017-04-19 2022-03-11 株式会社神户制钢所 Compressed air energy storage power generation device and compressed air energy storage power generation method
US9850883B1 (en) 2017-08-10 2017-12-26 Bajaura S.A. DE C.V. Apparatus and method for generating electricity from integrated air flows and thermal energy
CN107702086A (en) * 2017-10-24 2018-02-16 西安西热节能技术有限公司 A kind of peak regulation system and method using fuse salt heat accumulation
CN107702086B (en) * 2017-10-24 2023-10-20 西安西热节能技术有限公司 Peak regulating system and method for storing heat by using molten salt
CN108457712A (en) * 2018-03-02 2018-08-28 中国科学院上海应用物理研究所 Molten salt reactor energy conversion system and energy transformation method

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Application publication date: 20150311