CN207598442U - Low temperature system for geothermal production of electricity in a kind of distribution - Google Patents
Low temperature system for geothermal production of electricity in a kind of distribution Download PDFInfo
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- CN207598442U CN207598442U CN201721373361.6U CN201721373361U CN207598442U CN 207598442 U CN207598442 U CN 207598442U CN 201721373361 U CN201721373361 U CN 201721373361U CN 207598442 U CN207598442 U CN 207598442U
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- generator
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- low temperature
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model provides low temperature system for geothermal production of electricity in a kind of distribution, low temperature system for geothermal production of electricity includes heat source in the distribution, heat exchanger, input pipe, efferent duct, Stirling engine and generator, control switch, electric energy output end and excitation and cutting-in control unit, the heat exchanger is arranged in heat source, working medium is housed in the heat exchanger, the working medium absorbs thermal energy in a heat exchanger, working medium after heated is entered by input pipe in Stirling engine, the Stirling engine is driven to run, working medium after release thermal energy, which is returned to by efferent duct in heat exchanger, to be continued to absorb thermal energy, the Stirling engine drives operation is synchronous to drive the generator operation power generation by working medium, the generator is powered to the electric energy output end, the excitation and cutting-in control unit control supply line and frequency of supply.Low temperature system for geothermal production of electricity in a kind of distribution provided by the utility model, electric energy switching reliability and stability are preferable, strong to underground heat Morphological adaptability.
Description
Technical field
The utility model is related to low temperature system for geothermal production of electricity in distributed power generation field more particularly to a kind of distribution.
Background technology
For a long time, in various renewable energy systems, people increasingly focus on solar energy from space and
Wind energy but has ignored the affluent resources that the earth assigns the mankind in itself --- geothermal energy.Compared with wind energy, solar power system,
Geothermal power plant's not influence of climate and time again, can day and night work, provide unbroken electric power.Therefore, countries in the world
Geothermal power generation is increasingly paid attention to.If it is envisaged that gives geothermal power generation concern accordingly and supports, in the coming years
Interior, geothermal power generation probably becomes the new forms of electricity generation seen together with solar energy, wind power generation amount.Therefore, geothermal power generation is explored
New construction have great importance.
At present to the mainly high temperature geothermal energy resources, for example geothermal vapour, geothermal water, combine and follow of underground heat gas-to electricity
The modes such as ring and underground heat rock, enhanced geothermal power generation, using the steam turbine power generation method identical with thermal power plant, this method is determined
The area that current geothermal power plant mainly build geothermal energy resources concentration in is determined, using centralized power generation pattern.It can be utilized into
Ripe thermal power generating technology and equipment, the area abundant especially suitable for high temperature geothermal energy resources, the source of thermal energy and stabilization
Degree is differed with traditional thermoelectricity power generation, influences the factor of system for geothermal production of electricity prime mover fluctuation of speed than conventional thermal power plant
It is more, but identical steam turbine power generation method is used, cause electric energy switching reliability and stability bad；Meanwhile existing underground heat hair
Electric system is mainly high temperature (steam) power generation, and not strong to other underground heat Morphological adaptabilities, what this caused geothermal power generation can addressing model
Reduction is enclosed, affects making full use of for different shape underground heat, especially in the Chinese this state based on middle low-temperature geothermal resource
Family.
Invention content
In view of this, the embodiment of the utility model provides a kind of electric energy switching reliability and stability preferably, over the ground
Low temperature system for geothermal production of electricity in a kind of strong distribution of hot Morphological adaptability.
The embodiment of the utility model provide it is a kind of it is distributed in low temperature system for geothermal production of electricity, it is described it is distributed in cryogenically
Heat generating system is opened including heat source, heat exchanger, input pipe, efferent duct, Stirling engine, generator, output lead, control
Pass, electric energy output end and excitation and cutting-in control unit, the heat source are low temperature geothermal sources, and the heat exchanger is arranged on heat source
In, equipped with working medium in the heat exchanger, the working medium is low boiling working fluid, and the working medium absorbs thermal energy in a heat exchanger,
The input pipe connects heat exchanger and Stirling engine with efferent duct, and the working medium after being heated enters Si Te by input pipe
In woods engine, the Stirling engine is driven to run, discharge the working medium after thermal energy and returned in heat exchanger by efferent duct
Continue to absorb thermal energy, Stirling engine connection coaxial with generator is transported when the Stirling engine is driven by working medium
Row, synchronous to drive the generator operation power generation, the generator is powered to the electric energy output end, and the switch is arranged on institute
It states between generator and the electric energy output end, can be closed or disconnect generator with electric energy output end for being electrically connected, it is described to encourage
The closure or disconnection and frequency of supply of magnetic and cutting-in control unit control supply line.
Further, institute's excitation and cutting-in control unit include controller, pwm converter, energy storage device and net side
Converter, the grid side converter and pwm converter are connected with each other, and the controller is simultaneously with the grid side converter and encouraging
Magnetic transformer and switch connection, the pwm converter are connect with generator, are powered when needing generator to electric energy output end
When, the pwm converter and the controller control switch are closed, and the generator is powered to electric energy output end, the control
The exciting current size and frequency of device and pwm converter control generator, so as to make generator output satisfactory steady
Constant voltage and electric current.
Further, the energy storage device is arranged on the DC side between the pwm converter and grid side converter, when
When the ground thermal parameter of heat source changes, the Stirling engine rotating speed, which can change, influences the output frequency of the generator
Rate, the controller and pwm converter control the energy storage device to compensate the changed power of the generator, make the power generation
The constant electric energy of machine output frequency realizes variable speed constant frequency generator.
Further, the grid side converter is connected with electric energy output end, when the Stirling engine or generator go out
During existing failure, the controller control energy storage device passes through grid side converter by the electrical energy transportation of storage to electric energy output end.
Further, the generator is double fed induction generators.
Low temperature system for geothermal production of electricity passes through described grid-connected and excitation con-trol list in a kind of distribution provided by the utility model
Member can not be influenced by underground heat factor variation, realize variable speed constant frequency generator, powered stable, reliability higher；In middle low heat
Power generation, be applicable in it is general enclose wide, using Stirling engine and double fed induction generators, improve the flexibility of geothermal power generation layout,
Noise is small, efficient, discharge is low.
Description of the drawings
Fig. 1 is a schematic diagram of low temperature system for geothermal production of electricity in a kind of distribution of the utility model.
Specific embodiment
It is new to this practicality below in conjunction with attached drawing to make the purpose of this utility model, technical solution and advantage clearer
Type embodiment is further described.
It please refers to Fig.1, the embodiment of the utility model provides low temperature system for geothermal production of electricity in a kind of distribution, the distribution
Low temperature system for geothermal production of electricity includes heat source 1, heat exchanger 2, input pipe 31, efferent duct 32, Stirling engine 4, power generation in formula
Machine 5, output lead 6, control switch 7, electric energy output end 8 and excitation and cutting-in control unit 20, the heat source 1 are low temperature underground heat
Source, the heat exchanger 2 are arranged in heat source 1, and equipped with working medium (not shown) in the heat exchanger 2, the working medium is low boiling
Point working medium, the working medium absorb thermal energy in heat exchanger 2, and the input pipe 31 and efferent duct 32 connect heat exchanger 2 and this
Special woods engine 4, the working medium after being heated are entered by input pipe 31 in Stirling engine 4, and the Stirling is driven to start
Machine 4 is run, and is discharged the working medium after thermal energy and is returned in heat exchanger 2 by efferent duct 32 and continues to absorb thermal energy, the Stirling hair
Motivation 4 and 5 coaxial connection of generator are run when the Stirling engine 4 is driven by working medium, synchronous to drive the generator 5
Operation power generation, the generator 5 are powered to the electric energy output end 8, and the switch 7 is arranged on the generator 5 and the electricity
Between energy output terminal 8, generator 5 can be closed or disconnected with electric energy output end 8 for being electrically connected, the excitation and cutting-in control list
20 control of the member switch 7 is closed or disconnects and the control of the output frequency of supply line.
The generator 5 is double fed induction generators.
The excitation and cutting-in control unit 20 include controller 9, pwm converter 12, energy storage device 11 and net side transformation
Device 10, the grid side converter 10 and pwm converter 12 are connected with each other, and the energy storage device 11 is arranged on the excitation transformation
DC side between device 12 and grid side converter 10, the controller 9 simultaneously with the grid side converter 10 and pwm converter
12 and 7 connection of switch, the pwm converter 12 connect with generator 5, and the controller 9 and the pwm converter 12 are controlled
The exciting current size and frequency of generator 5 processed；The grid side converter 10 is connect with electric energy output end 8, when the Stirling
When engine 4 or generator 5 break down, the controller 9 controls energy storage device 11 to pass through grid side converter 10 by storage
Electrical energy transportation is to electric energy output end 8.
When generator 5 is needed to power to electric energy output end 8, the pwm converter 12 and controller 9 control described open
7 are closed to be closed, the generator 5 powers to electric energy output end 8, be incorporated into the power networks or independent bringing onto load in the case of, the control
Device 9 and the pwm converter 12 control the energy storage device 11 to compensate the changed power of the generator 5, so as to make its power generation
Machine 5 exports satisfactory burning voltage and electric current；When the ground thermal parameter of heat source 1 changes, the Stirling engine 4
Rotating speed, which can change, influences the output frequency of the generator 5, and the controller 9 and pwm converter 12 control the power generation
The constant electric energy of 5 output frequency of machine realizes variable speed constant frequency generator.
When not needing to generator 5 and powering to electric energy output end 8, the grid side converter 10 and controller 9 control described
Switch 7 disconnects the generator 5 with electric energy output end 8 for being electrically connected, and the electric energy that the generator 5 exports is by energy storage device 11
Storage.
Herein, the involved nouns of locality such as forward and backward, upper and lower are to be located in figure with parts in attached drawing and zero
Part mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that the noun of locality
Use should not limit the claimed range of the application.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (5)
1. a kind of low temperature system for geothermal production of electricity in distribution, it is characterised in that：Low temperature system for geothermal production of electricity packet in the distribution
Include heat source, heat exchanger, input pipe, efferent duct, Stirling engine, generator, control switch, electric energy output end and excitation and
Cutting-in control unit, the heat source are low temperature geothermal sources, and the heat exchanger is arranged in heat source, is equipped in the heat exchanger
Working medium, the working medium are low boiling working fluids, and the working medium absorbs thermal energy in a heat exchanger, and the input pipe is connected with efferent duct
Heat exchanger and Stirling engine, the working medium after being heated are entered in Stirling engine by the input pipe described in driving
Stirling engine is run, and is discharged the working medium after thermal energy and is returned in the heat exchanger by the efferent duct and continues to absorb heat
Can, Stirling engine connection coaxial with the generator is run when the Stirling engine is driven by working medium, synchronous
The generator operation power generation is driven, the generator is powered to the electric energy output end, and the switch is arranged on the power generation
Between machine and the electric energy output end, can be closed or disconnect generator and electric energy output end for being electrically connected, the excitation and simultaneously
The closure of net control unit control supply line or disconnection and frequency of supply.
2. low temperature system for geothermal production of electricity in distribution as described in claim 1, it is characterised in that：Institute's excitation and simultaneously network control
Unit processed includes controller, pwm converter, energy storage device and grid side converter, the grid side converter and pwm converter phase
It connects, the controller connects simultaneously with the grid side converter and pwm converter and switch, the pwm converter
It connect with generator, when generator is needed to power to electric energy output end, is opened described in the pwm converter and controller control
It closes and closes, the generator is powered to electric energy output end, the excitation of the controller and pwm converter control generator
Size of current and frequency, so as to which generator be made to export satisfactory burning voltage and electric current.
3. low temperature system for geothermal production of electricity in a kind of distribution as claimed in claim 2, it is characterised in that：The energy storage device is set
Put the DC side between the pwm converter and grid side converter, when the ground thermal parameter of heat source changes, it is described this
Special woods engine speed, which can change, influences the output frequency of the generator, the controller and pwm converter control institute
The changed power that energy storage device compensates the generator is stated, the electric energy for making the alternator output frequency constant realizes that speed change is permanent
Take place frequently electricity.
4. low temperature system for geothermal production of electricity in a kind of distribution as claimed in claim 3, it is characterised in that：The grid side converter
It is connected with electric energy output end, when the Stirling engine or generator failure, the controller controls energy storage device
By grid side converter by the electrical energy transportation of storage to electric energy output end.
5. low temperature system for geothermal production of electricity in a kind of distribution as claimed in claim 4, it is characterised in that：The generator is double
Present influence generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721373361.6U CN207598442U (en) | 2017-10-20 | 2017-10-20 | Low temperature system for geothermal production of electricity in a kind of distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721373361.6U CN207598442U (en) | 2017-10-20 | 2017-10-20 | Low temperature system for geothermal production of electricity in a kind of distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207598442U true CN207598442U (en) | 2018-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721373361.6U Expired - Fee Related CN207598442U (en) | 2017-10-20 | 2017-10-20 | Low temperature system for geothermal production of electricity in a kind of distribution |
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| CN (1) | CN207598442U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762749A (en) * | 2017-10-20 | 2018-03-06 | 中国地质大学（武汉） | Low temperature geothermal power generation plant in a kind of distribution |
-
2017
- 2017-10-20 CN CN201721373361.6U patent/CN207598442U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762749A (en) * | 2017-10-20 | 2018-03-06 | 中国地质大学（武汉） | Low temperature geothermal power generation plant in a kind of distribution |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180710 Termination date: 20181020 |