CN108071519A - A kind of solar energy Stirling gen-set control system and method - Google Patents
A kind of solar energy Stirling gen-set control system and method Download PDFInfo
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- CN108071519A CN108071519A CN201611025446.5A CN201611025446A CN108071519A CN 108071519 A CN108071519 A CN 108071519A CN 201611025446 A CN201611025446 A CN 201611025446A CN 108071519 A CN108071519 A CN 108071519A
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- generating set
- tube wall
- energy stirling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/045—Controlling
- F02G1/047—Controlling by varying the heating or cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a kind of solar energy Stirling gen-set control system and methods, present system includes detection unit, judging unit and control unit, detection unit is used to detect sunlight strength, unit power pressure, tube wall temperature, water temperature and rotating speed, and testing result is sent to judging unit, the scope that judging unit is according to default value judgement detection unit detected value, it will determine that result is sent to control unit again, control unit completes the control of the solar energy Stirling generating set course of work.The method of the present invention：By the unit course of work be divided into interlocking check, optically focused heating, dragging, climbing, operation and parking etc. the stages composition.Control method and system provided by the invention, damage of the impulses power to each component of unit when can effectively reduce startup of unit, unit power pressure is adjusted according to sunlight strength situation simultaneously, and then unit tube wall temperature is controlled to be operated in highest safe range, while ensure that unit highly effective and safe is run.
Description
Technical field
The present invention relates to Stirling engine technology field, espespecially a kind of solar energy Stirling generating set electricity generation system
Control system and method.
Background technology
At present, it is increasingly severe to result in problem of environmental pollution based on traditional fossil energy for Chinese energy-consuming；
Solar energy is a kind of regenerative resource, pollution-free, therefore obtains more and more applications.Stirling engine is a kind of external combustion
Formula closed circulation reciprocating-piston Thermal Motor.Compared with internal combustion engine, Stirling engine has fuel wide adaptation range, makes an uproar
The features such as sound is low, maintaining expense is low, stable output power.Dish-style stirling generator group is that one kind passes through focusing sunlight
It generates high temperature and then promotes the technology of Stirling engine power generation, be focusing sunlight power generation (Concentrating Solar
Power, CSP) one kind in technology.Since the technology has the features such as light gathering is strong, and the thermal efficiency of prime mover is high.In CSP
In several technologies, dish-style stirling generator group conversion efficiency of thermoelectric highest, conversion efficiency of thermoelectric can reach more than 30%.Together
When, dish-style stirling generator group technology also have single-machine capacity it is moderate, hardly consume water resource the features such as, be conducive to promote
Using.
When dish-style stirling generator group starts, the working medium of certain pressure is preset in unit, Stirling to be protected to send out
The parts of motivation are in order to avoid too fast heated and damage.Due to being that the working medium with certain pressure starts, if directly quick carry out
It starting, the rotating speed of unit is made quickly to change to rated speed from zero, the impact that the associated components for making unit are subject to increases very much,
Active force such as the transmission parts of Stirling engine impacts and the electromagnetic percussion and Thermal Stress of generator, almost often
Associated components may be caused to damage during one push start, make the service life and reliability decrease of associated components, make dish-style
The failure rate of stirling generator group rises.
When dish-style stirling generator group is run, it is variation since the intensity of sunlight is uncontrollable, therefore, gathers
Coke is also variation in the temperature of Stirling engine heater tube wall, if the temperature mistake of Stirling engine heater tube wall
Height if heater tube wall temperature is more than the maximum temperature scope that heater material can be born, can make overheated heater and damage
It is bad, if heater tube wall temperature lower temperature run, solar energy Stirling generating set it is less efficient, economy compared with
Difference.
Those skilled in the art needs a kind of design power generation reasonable, at low cost, simple in structure and highly practical therefore
Control system and control method reduce and the impact of associated components such as transmission parts are made when being started to dish-style stirling generator group
Firmly and the electromagnetic percussion and Thermal Stress of generator, the probability that associated components are caused with damage is reduced, so as to improve
The service life and reliability of associated components reduce the failure rate of dish-style stirling generator group；In unit operation, it is necessary to handle
In the highest safe range that the control of dish-style stirling generator group heater tube wall temperature is allowed in heater material, pacify unit
Full Effec-tive Function.
The content of the invention
Dish-style stirling generator set control system and control method can be used in it is an object of the invention to provide a kind of,
The impact forces and generator to associated components such as transmission parts can be reduced when dish-style stirling generator group starts
Electromagnetic percussion and Thermal Stress, and then reduce to associated components cause damage probability, so as to improve associated components
Service life and reliability reduce the failure rate of dish-style stirling generator group；Can also transport unit using the method for the present invention
During row, effectively the highest allowed in heater material can be controlled to pacify dish-style stirling generator group heater tube wall temperature
In gamut, make unit safety Effec-tive Function, economic benefit is higher.
To solve the above problems, the present invention provides a kind of solar energy Stirling gen-set control system, which includes：
Control system includes detection unit, judging unit and control unit.
The detection unit, for detecting sun sunlight strength, generating unit speed, the tube wall of solar energy Stirling generating set
Temperature, power pressure, water temperature and wind speed, and testing result is sent to judging unit.The detection unit includes：Sunlight is strong
Detection module is spent, is used to detect the sun sunlight strength under solar energy Stirling generating set local environment；Generating unit speed is examined
Module is surveyed, is used to detect the Speed of Reaction Wheels of solar energy Stirling generating set；Tube wall temperature detection module is used to detect too
Temperature on the heater tube wall of positive energy stirling generator group；Power pressure detection module, being used to detecting solar energy, this is special
Working medium gas pressure in woods generating set；Water temperature detection module, is used to detect and is cooled down in solar energy Stirling generating set
The temperature of circulatory system water；Wind speed measurement module is used to detect the wind speed under solar energy Stirling generating set local environment.
The judging unit, scope residing for the detected value for judging the detection unit according to setting value, and will determine that result
It is sent to control unit.The judging unit includes：Sunlight strength judgment module, generating unit speed judgment module, tube wall temperature are sentenced
Disconnected module, power pressure judgment module, water temperature judgment module and water temperature judgment module.Sunlight strength judgment module, is used for root
According to the testing result of the sunlight strength detection module, judge the environment sun sunlight strength and setting light intensity (startup of unit,
Stop light intensity) size, and will determine that result is sent to described control unit；Generating unit speed judgment module is used for according to institute
The testing result of generating unit speed detection module is stated, judges the generating unit speed and setting speed (dragging rotating speed, climbing rotating speed, fortune
Row rotating speed and parking rotating speed) size, and will determine that result is sent to described control unit；Tube wall temperature judgment module is used
In the testing result according to the tube wall temperature detection module, unit tube wall temperature and setting value (startup of unit tube wall temperature are judged
Degree, unit climbing tube wall temperature, unit operation temperature and parking temperature) size, and will determine that result is sent to the control
Unit；Power pressure judgment module is used for the testing result according to unit power pressure detection module, judges unit working medium pressure
The size of power and setting value (starting pressure, operating pressure), and will determine that result is sent to described control unit；Water temperature judges mould
Block is used for the testing result according to unit water temperature detection module, judges that unit water temperature shuts down the size of water temperature with setting, and will
Judging result is sent to described control unit；Wind speed judgment module is used for the testing result according to unit wind speed measurement module,
Judge that the wind speed of unit local environment shuts down the size of wind speed with setting, and will determine that result is sent to described control unit.
Described control unit, in the unit course of work, first completing to generate electricity into solar energy Stirling by detection unit
The state-detection of unit, and testing result is sent to judging unit, judging unit judges detection unit according to default value
The scope that detected value is in, then will determine that result is sent to control unit, control unit completes solar energy Stirling generating set
The course of work controls.
The solar energy Stirling gen-set control system, which is characterized in that measuring unit heater tube wall temperature
The sensor used is thermocouple.
Another object of the present invention is to provide a kind of control method of solar energy Stirling generating set electricity generation system：
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the unit work
State includes：Prepare, start, run, stop and safeguard.
When the preparation state refers to that solar energy Stirling generating set electricity generation system is started to work every time, control
A series of self-tests work that system will carry out, i.e. interlocking check the course of work；The state of starting to work refers to solar energy
Stirling generator group rotary speed of generator group is by zero to setting rated speed interval range, unit control system carries out poly-
Light heating, dragging, climbing job control process stage；The operation working condition refers to according to sunlight strength situation of change tune
Unit power pressure is saved, and then unit tube wall temperature is controlled to be operated in highest safe range, makes rotation speed change slow, system work
Work is stablized；The parking working condition refers to control system according to parking logical process control solar energy Stirling generating set
Complete unit parking work；The maintenance work refers to requirement of the control system by unit maintenance, controls sun can Stirling hair
Motor group is parked in the position required by maintenance work, is worked with carrying out corresponding several group maintenances.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that unit is worked
Journey be divided into interlocking check, optically focused heating, dragging, climbing, operation and parking etc. the stages composition.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the interlocking inspection
The inspection of the stage completion each sensor of solar energy Stirling generating set electricity generation system is looked into, while completes following work：
1) optically focused dish rotating property is checked；
2) check whether sunlight intensity is more than startup of unit light intensity setting value；
3) check whether the wind speed of solar energy Stirling generating set local environment is less than shutdown wind speed；
4) check unit power pressure whether in the range of defined starting pressure.
If any one parameter in above-mentioned condition is unsatisfactory for, fault bit is reported, and into dead ship condition, without failure
Into the optically focused temperature rise period.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the optically focused liter
Thermophase completes the solar tracking control of optically focused dish, makes sunlight uniform focus on the heater of Stirling engine, simultaneously
Control the water pump operation of solar energy Stirling generating set.According to different sunlight intensities, if tube wall temperature is in defined phase
Reach startup of unit tube wall temperature setting value in seasonable, then into dragging stage, on the contrary then parking process of alarming..
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the dragging rank
Section, control system open the generator of solar energy Stirling generating set, while detect turning for solar energy Stirling generating set
Speed.Show to start successfully section if generating unit speed at the appointed time reaches the dragging rotating speed of default and enter tube wall temperature
Ramp up shows starting failure alarm parking process if rotating speed is less than defined tachometer value.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the climbing rank
Section, control system detect the rotating speed of unit, if generating unit speed reaches the climbing rotating speed of default, control system at the appointed time
System closes solar energy Stirling generating set working medium short valve, then with reference to the situation of change of sun sunlight strength, if short valve closes
Tube wall temperature after conjunction can reach default value unit climbing tube wall temperature at the appointed time, then into the operation phase, instead
Parking process of then alarming.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the operation rank
Section, according to the tube wall temperature of generating set at this time and the numerical value of highest tube wall temperature set value calculation power pressure, control method
It is as follows：The difference of highest tube wall temperature and highest tube wall temperature setting value is calculated, power pressure is calculated in value progress PID
The changing value of setting value adjusts working medium air inlet and exhaust valve according to the changing value.Stirling is controlled by the power pressure for adjusting unit
Engine heater tube wall temperature is allowed to be operated in the highest safe range of material.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that solar energy Stirling
When generating set stops, unit control system controls short valve to open first, and the operation of optically focused dish is then controlled to return to home,
After monitoring unit tube wall temperature reaches the parking temperature of setting value unit first, control system stops the generator of control unit,
At this point, water pump still works, after unit tube wall temperature to be monitored reaches the parking temperature of setting value unit second, control system makes control
The water pump of unit processed stops, and completes entire parking work.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that the maintenance is
Refer to according to solar energy Stirling generating set electricity generation system need of work, control system control solar energy Stirling generating set stops
Only in corresponding position：Dish maintenance position, engine maintenance position.
The control method of the solar energy Stirling generating set electricity generation system, which is characterized in that optically focused dish tracks too
Sun tracks using program and tracks the method being combined with photosensitive.
Solar energy Stirling gen-set control system and method, feature described in any one claim exist
In the working medium short valve is solenoid valve.
The beneficial effects of the invention are as follows：
1st, the present invention provides solar energy Stirling gen-set control system and method, and solar energy is detected by detection unit
The systematic parameter of stirling generator group, and then solar energy Stirling generating set systematic parameter and the ginseng are judged by judging unit
The size of number setting value, finally by control unit according to the judgement output control solar energy Stirling generating set of identifying unit
On the opportunity of unlatching or the stopping of generator, water pump and short-circuit solenoid valve, certain benefit can be brought to unit.Such as dragging
Before, pump working is controlled, can effectively prevent the excess calories inside Stirling engine from gathering and damaging engine components, drag
Working medium short valve, which treats that unit turn up is just closed to certain numerical value, when dynamic can effectively reduce to solar energy Stirling generating set
The impact forces of associated components such as transmission parts and the electromagnetic percussion and Thermal Stress of generator, and then reduce to phase
The probability that component causes damage is closed, so as to improve the service life of associated components and reliability, reduces dish-style stirling generator
The failure rate of group.
2nd, the present invention provides solar energy Stirling gen-set control system and method, in solar energy Stirling generating set
Operation phase calculates the difference of highest tube wall temperature and highest tube wall temperature setting value, and value progress PID is calculated working medium
The changing value of pressure set points adjusts working medium air inlet and exhaust valve according to the changing value.This is controlled by the power pressure for adjusting unit
Special woods engine heater tube wall temperature is allowed to be operated in the highest safe range of material, it is ensured that Stirling engine
Heater will not be burnt due to overheat, cause solar energy Stirling generating set failure, simultaneously as the control of power pressure makes
Stirling engine heater tube wall temperature is high as far as possible, and the generating efficiency of solar energy Stirling generating set is higher, unit
Economy it is also relatively high.
Description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to solar energy Stirling generator
Set control system and the above-mentioned characteristic of method, technical characteristic, advantage and its realization method are further described.
Fig. 1 is the structure diagram of the solar energy Stirling gen-set control system of the present invention.
Reference sign
1- detection units：
11- sunlight strength detection modules；12- generating unit speed detection modules；13- tube wall temperature detection modules；14- working medium pressures
Power detection module；15- water temperature detection modules；16- wind speed measurement modules；
2- judging units：
21- sunlight strength detection modules；12- generating unit speed detection modules；13- tube wall temperature detection modules；14- working medium pressures
Power detection module；15- water temperature detection modules；16- wind speed measurement modules；
3- control units：
31- generators；32- water pumps；33- solenoid valves；44- optically focused dish.
Specific embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, control is illustrated below
The specific embodiment of the present invention.It should be evident that the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, their not generations
Its practical structures as product of table.In addition, so that simplified form readily appreciates, the connection expression electrical connection of filament, empty in figure
The arrow line of the heart represents the connection of signal.
In an embodiment of the present invention, with reference to shown in Fig. 1, it is single that solar energy Stirling gen-set control system includes detection
Member 1, judging unit 2 and control unit 3.Detection unit 1 be used for detect solar energy Stirling generating set sun sunlight strength,
Generating unit speed, tube wall temperature, power pressure, water temperature and wind speed, and testing result is sent to judging unit 2；Judging unit 2
Term scope according to residing for the detected value that setting value judges the detection unit 1, and will determine that result is sent to control unit 3；
Control unit 3 is used to complete the control of the solar energy Stirling generating set course of work according to the judging result of judging unit 2.
Detection unit 1 by sunlight strength detection module 11, generating unit speed detection module 12, tube wall temperature detection module 13,
Power pressure detection module 14, water temperature detection module 15 and wind speed measurement module 16 form.Wherein, sunlight strength detection module
11, it is used to detect the sun sunlight strength under solar energy Stirling generating set local environment；Generating unit speed detection module 12,
It is used for the Speed of Reaction Wheels for detecting solar energy Stirling generating set；Tube wall temperature detection module 13 is used to detect solar energy
Temperature on the heater tube wall of stirling generator group；Power pressure detection module 14 is used to detect solar energy Stirling
Working medium gas pressure in generating set；Water temperature detection module 15, is used to detect and is cooled down in solar energy Stirling generating set
The temperature of circulatory system water；Wind speed measurement module 16 is used to detect the wind under solar energy Stirling generating set local environment
Speed.
Judging unit 2 includes：Sunlight strength judgment module 21, generating unit speed judgment module 22, tube wall temperature judgment module
23rd, power pressure judgment module 24, water temperature judgment module 25 and water temperature judgment module 26.Sunlight strength judgment module 21 is used
In the testing result according to the sunlight strength detection module 11, the environment sun sunlight strength and setting light intensity (machine are judged
Group starts, parking light intensity) size, and will determine that result is sent to described control unit 3；Generating unit speed judgment module 22,
For the testing result according to the generating unit speed detection module 12, judge the generating unit speed and setting speed (dragging rotating speed,
Climb rotating speed, running speed and parking rotating speed) size, and will determine that result is sent to described control unit 3；Tube wall temperature is sentenced
Disconnected module 23, is used for the testing result according to the tube wall temperature detection module 13, judge unit heat device tube wall temperature with
The size of setting value (startup of unit tube wall temperature, unit climbing tube wall temperature, unit operation temperature and parking temperature), and will sentence
Disconnected result is sent to described control unit 3；Power pressure judgment module 24 is used for according to unit power pressure detection module 14
Testing result, judge the size of unit power pressure and setting value (starting pressure, operating pressure), and will determine that result send
To described control unit 3；Water temperature judgment module 25 is used for the testing result according to unit water temperature detection module 15, judges machine
Group water temperature shuts down the size of water temperature with setting, and will determine that result is sent to described control unit 3；Wind speed judgment module 26,
For the testing result according to unit wind speed measurement module 16, the wind speed and setting for judging unit local environment shut down the big of wind speed
It is small, and will determine that result is sent to described control unit 3.
Control unit 3, the object that control unit 3 controls is respectively generator 31, water pump 32, solenoid valve 33 and optically focused dish
34.For in the unit course of work, first completing into the state-detection of solar energy Stirling generating set by detection unit 1, and
Testing result is sent to judging unit 2, the model that judging unit 2 is according to default value judgement 1 detected value of detection unit
It encloses, then will determine that result is sent to control unit 3, control unit 3 completes the control of the solar energy Stirling generating set course of work.
The sensor that 13 measuring unit heater tube wall temperature of tube wall temperature detection module uses is thermocouple.
In the present embodiment, solar energy Stirling gen-set control system proposed by the present invention and method, controlling party
Method is described as follows：
In the present embodiment, the unit course of work is divided into interlocking inspection, optically focused heating, dragging, climbing, operation and stopped
The stages of grade composition.
In the present embodiment, unit working condition is divided into：Prepare, start, run, stop and safeguard.
In the present embodiment, the preparation state refers to that solar energy Stirling generating set electricity generation system is opened every time
During beginning work, a series of self-tests that control system will carry out work, i.e. interlocking checks the course of work；The shape that starts to work
State refer to solar energy Stirling generating set electricity generator group rotating speed by zero to setting rated speed interval range in, unit allocation
The optically focused that system carries out heats up, drags, climbing job control process stage；The operation working condition refers to strong according to sunlight
It spends situation of change and adjusts unit power pressure, and then unit tube wall temperature is controlled to be operated in highest safe range, become rotating speed
Change slow, system the operation is stable；The parking working condition refers to control system according to parking logical process control solar energy
Stirling generator group completes unit parking work；The maintenance work refers to requirement of the control system by unit maintenance, control
Unit 3 processed controls the optically focused dish 34 of positive energy stirling generator group to be parked in the position required by maintenance work, corresponding to carry out
A few group maintenance work.
It interlocks examination phase detection unit 1, judging unit 2 and control unit 3 and completes solar energy Stirling generating set hair
The inspection of each sensor of electric system, while complete following work：
1) 34 rotating property of optically focused dish is checked；
2) check whether sunlight intensity is more than startup of unit light intensity setting value；
3) check whether the wind speed of solar energy Stirling generating set local environment is less than shutdown wind speed；
4) check unit power pressure whether in the range of defined starting pressure.
If any one parameter in above-mentioned condition is unsatisfactory for, fault bit is reported, and into dead ship condition, without failure
Into the optically focused temperature rise period.
Optically focused temperature rise period control unit 3 completes the solar tracking control of optically focused dish 34, makes sunlight uniform focus at this
On the heater of special woods engine, while control unit 3 controls the water pump 32 of solar energy Stirling generating set to run.According to not
Same sunlight intensity, if tube wall temperature reaches startup of unit tube wall temperature setting value within the defined corresponding time, enters
Dragging stage, on the contrary then parking process of alarming.
In the dragging stage, the generator 31 of solar energy Stirling generating set is opened in the control of control unit 3, while detects the sun
The rotating speed of energy stirling generator group.Show to start if generating unit speed at the appointed time reaches the dragging rotating speed of default
Success section simultaneously enters tube wall temperature ramp up, shows starting failure alarm parking area if rotating speed is less than defined tachometer value
Reason.
Ramp up, control system detects the rotating speed of unit, if generating unit speed reaches default at the appointed time
Climbing rotating speed, solar energy Stirling generating set working medium short valve 33 is closed in the control of control unit 3, then with reference to sun sunlight strength
Situation of change, if short valve be closed after tube wall temperature can reach at the appointed time default value unit climbing tube wall temperature
Degree, then into operation phase, on the contrary then parking process of alarming.
Operation phase, control unit 3 is according to the tube wall temperature of generating set at this time and highest tube wall temperature set value calculation
The numerical value of power pressure, control method are as follows：Control unit 3 calculates the difference of highest tube wall temperature and highest tube wall temperature setting value
Value progress PID is calculated the changing value of power pressure setting value, working medium air inlet and exhaust valve is adjusted according to the changing value by value
35.Stirling engine heater tube wall temperature is controlled by the power pressure for adjusting unit, is allowed to be operated in the highest of material
In safe range.
When solar energy Stirling generating set stops, control optically focused dish 34 deviates operation and returns to home, monitors unit
After tube wall temperature reaches the parking temperature of setting value unit first, control unit 3 controls short valve 33 to open first, and then control is single
Member 3 stops the generator 31 of control unit, at this point, water pump 32 still works, unit tube wall temperature to be monitored reaches setting value
Unit second stops after temperature, and control unit 3 stops the water pump 32 of control unit, completes entire parking work.
Maintenance refers to that, according to solar energy Stirling generating set electricity generation system need of work, control unit 3 controls solar energy
Stirling generator group stops at corresponding position：34 maintenance position of optically focused dish, engine maintenance position.
In the present embodiment, optically focused dish 34 tracks the sun and the method being combined with photosensitive tracking is tracked using program.
In the present embodiment, working medium short valve 33 is solenoid valve.
In the present embodiment, generator 21 is asynchronous generator, in the dragging stage, the control control generator of control unit 3
It starts, generator 31 drives Stirling engine to rotate at this time, when generating unit speed rises to the climbing rotating speed of setting, control unit
3 are closed the working medium short valve 33 of unit, gradually form Stirling cycle, are converted to Stirling engine and drive 31 turns of generator
Dynamic, after the speed of rotation is more than the synchronous rotational speed of generator, generator is in generating state.
For solar energy Stirling generating set in parking, control unit 3 controls optically focused dish 34 to deviate first, cuts off unit energy
Amount supply, due to still there is remaining heat in Stirling engine, the temperature of Stirling engine thermal head is still higher, it is impossible to vertical
Parking is carved, it is necessary to which the temperature is reduced to after security value (s) entire unit stop motion again, electricity generation system remains to generate electricity, Stirling
Engine drawing generator 31 rotates, but generated output is gradually reduced, when rotating speed descends below 31 synchronous rotational speed of generator, too
Sun energy stirling generator group power generation is zero, is converted into generator 31 and drags Stirling engine rotation, whole system, which is used as, to be made
Cold operation is to reduce the temperature of Stirling engine, and after reaching setting numerical value, control unit 3 controls short valve 33 to open first
It opens, then control unit 3 stops the generator 31 of control unit, at this point, water pump 32 still works, unit tube wall temperature to be monitored
After degree reaches the parking temperature of setting value unit second, control unit 3 stops the water pump 32 of control unit, completes entire parking work
Make.
It should be noted that above-described embodiment can be freely combined as needed.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, do not departing from the premise of the principle of the invention
Under, several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (14)
1. a kind of solar energy Stirling gen-set control system, which is characterized in that control system includes detection unit, judges list
Member and control unit.
The detection unit, for detecting the sun sunlight strength of solar energy Stirling generating set, generating unit speed, tube wall temperature
Degree, power pressure, water temperature and wind speed, and testing result is sent to judging unit.The detection unit includes：Sunlight strength
Detection module is used to detect the sun sunlight strength under solar energy Stirling generating set local environment；Generating unit speed detects
Module is used to detect the Speed of Reaction Wheels of solar energy Stirling generating set；Tube wall temperature detection module is used to detect the sun
Temperature on the heater tube wall of energy stirling generator group；Power pressure detection module is used to detect solar energy Stirling
Working medium gas pressure in generating set；Water temperature detection module is used to detect cooling in solar energy Stirling generating set and follows
The temperature of loop system water；Wind speed measurement module is used to detect the wind speed under solar energy Stirling generating set local environment.
The judging unit, scope residing for the detected value for judging the detection unit according to setting value, and will determine that result is sent
To control unit.The judging unit includes：Sunlight strength judgment module, generating unit speed judgment module, tube wall temperature judge mould
Block, power pressure judgment module, water temperature judgment module and water temperature judgment module.Sunlight strength judgment module is used for according to institute
The testing result of sunlight strength detection module is stated, judges the environment sun sunlight strength and setting light intensity (startup of unit, parking
Light intensity) size, and will determine that result is sent to described control unit；Generating unit speed judgment module is used for according to the machine
The testing result of group Rotating speed measring module judges that (dragging rotating speed, climbing rotating speed, operation turn the generating unit speed with setting speed
Speed and parking rotating speed) size, and will determine that result is sent to described control unit；Tube wall temperature judgment module, is used for root
According to the testing result of the tube wall temperature detection module, unit heat device tube wall temperature and setting value (startup of unit tube wall are judged
Temperature, unit climbing tube wall temperature, unit operation temperature and parking temperature) size, and will determine that result is sent to the control
Unit processed；Power pressure judgment module is used for the testing result according to unit power pressure detection module, judges unit working medium
The size of pressure and setting value (starting pressure, operating pressure), and will determine that result is sent to described control unit；Water temperature judges
Module is used for the testing result according to unit water temperature detection module, judges that unit water temperature shuts down the size of water temperature with setting, and
It will determine that result is sent to described control unit；Wind speed judgment module is used for the detection knot according to unit wind speed measurement module
Fruit judges that the wind speed of unit local environment shuts down the size of wind speed with setting, and will determine that result is sent to described control unit.
Described control unit, in the unit course of work, first being completed by detection unit into solar energy Stirling generating set
State-detection, and testing result is sent to judging unit, judging unit judges that detection unit detects according to default value
The scope that value is in, then will determine that result is sent to control unit, control unit completes the work of solar energy Stirling generating set
Process control.
2. a kind of require the solar energy Stirling gen-set control system based on right 1, which is characterized in that measuring unit
The sensor that heater tube wall temperature uses is thermocouple.
3. a kind of control method that the solar energy Stirling generating set electricity generation system is required based on right 1, feature are existed
In the unit working condition includes：Prepare, start, run, stop and safeguard.
4. a kind of control method that the solar energy Stirling generating set electricity generation system is required based on right 2, feature are existed
In, by the unit course of work be divided into interlocking check, optically focused heating, dragging, climbing, operation and parking etc. the stages form.Described
When preparation state refers to that solar energy Stirling generating set electricity generation system is started to work every time, what control system will carry out
A series of self-test work, i.e. interlocking check the course of work；The state of starting to work refers to solar energy Stirling generating set
Rotary speed of generator group is by zero to setting rated speed interval range, the optically focused that unit control system carries out is heated up, drags, climbed
Slope job control process stage；The operation working condition refers to adjust unit working medium pressure according to sunlight strength situation of change
Power, and then unit tube wall temperature is controlled to be operated in highest safe range, make rotation speed change slow, system the operation is stable；It is described
Parking working condition refer to that control system is completed unit according to parking logical process control solar energy Stirling generating set and stopped
Turner is made；The maintenance work refers to requirement of the control system by unit maintenance, and sun energy stirling generator group is controlled to be parked in
Position required by maintenance work is worked with carrying out corresponding several group maintenances.
5. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that institute
The interlocking examination phase stated completes the inspection of each sensor of solar energy Stirling generating set electricity generation system, while completes following
Work：
1) optically focused dish rotating property is checked；
2) check whether sunlight intensity is more than startup of unit light intensity setting value；
3) check whether the wind speed of solar energy Stirling generating set local environment is less than shutdown wind speed；
4) check unit power pressure whether in the range of defined starting pressure.
If any one parameter in above-mentioned condition is unsatisfactory for, fault bit is reported, and into dead ship condition, is entered without failure
The optically focused temperature rise period.
6. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that institute
The optically focused temperature rise period stated completes the solar tracking control of optically focused dish, makes heating of the sunlight uniform focus in Stirling engine
On device, while control the water pump operation of solar energy Stirling generating set.According to different sunlight intensities, if tube wall temperature exists
Reach startup of unit tube wall temperature setting value in the defined corresponding time, then into dragging stage, on the contrary then parking process of alarming.
7. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that institute
The dragging stage stated, control system open the generator of solar energy Stirling generating set, while detect solar energy Stirling hair
The rotating speed of motor group.Show that starting successfully section goes forward side by side if generating unit speed at the appointed time reaches the dragging rotating speed of default
Enter tube wall temperature ramp up, show starting failure alarm parking process if rotating speed is less than defined tachometer value.
8. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that institute
The ramp up stated, control system detects the rotating speed of unit, if generating unit speed reaches the climbing of default at the appointed time
Rotating speed, control system close solar energy Stirling generating set working medium short valve, then with reference to the situation of change of sun sunlight strength,
The tube wall temperature after if short valve is closed can reach default value unit climbing tube wall temperature at the appointed time, into fortune
Row order section, on the contrary then parking process of alarming.
9. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that institute
The operation phase stated, according to the tube wall temperature of generating set at this time and the number of highest tube wall temperature set value calculation power pressure
Value, control method are as follows：The difference of highest tube wall temperature and highest tube wall temperature setting value is calculated, which is subjected to PID calculating
The changing value of power pressure setting value is obtained, working medium air inlet and exhaust valve is adjusted according to the changing value.By the working medium pressure for adjusting unit
Power controls Stirling engine heater tube wall temperature, is allowed to be operated in the highest safe range of material.
10. the control method of the solar energy Stirling generating set electricity generation system is required based on right 3, which is characterized in that
When solar energy Stirling generating set stops, unit control system controls short valve to open first, then controls the operation of optically focused dish
Home is returned to, after monitoring unit tube wall temperature reaches the parking temperature of setting value unit first, control system makes control unit
Generator stop, at this point, water pump still works, unit tube wall temperature to be monitored reaches setting value unit second and stops temperature
Afterwards, control system stops the water pump of control unit, completes entire parking work.
11. the control method of the solar energy Stirling generating set electricity generation system is required based on right 2, which is characterized in that
The maintenance refers to according to solar energy Stirling generating set electricity generation system need of work, this spy of control system control solar energy
Woods generating set stops at corresponding position：Optically focused dish maintenance position, engine maintenance position.
12. the controlling party based on the solar energy Stirling generating set electricity generation system described in the upper any one claim
Method, which is characterized in that optically focused dish tracks the sun and the method being combined with photosensitive tracking is tracked using program.
13. based on solar energy Stirling gen-set control system and method described in the upper any one claim,
It is characterized in that, the working medium short valve is solenoid valve.
14. based on solar energy Stirling gen-set control system and method described in the upper any one claim,
It being characterized in that, the generator is asynchronous generator, in the dragging stage, control unit control control generator starting, at this time
Generator drives Stirling engine to rotate, and when generating unit speed rises to the climbing rotating speed of setting, control unit makes the work of unit
Matter short valve is closed, and gradually forms Stirling cycle, is converted to Stirling engine and generator is driven to rotate, when the speed of rotation
After the synchronous rotational speed of generator, generator is in generating state.
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| CN112228171A (en) * | 2020-11-03 | 2021-01-15 | 上海齐耀动力技术有限公司 | Supercritical carbon dioxide turbine-starting motor-compressor unit |
| CN112343731A (en) * | 2020-10-22 | 2021-02-09 | 上海齐耀动力技术有限公司 | Power generation control method and system for molten salt Stirling engine |
| CN113250850A (en) * | 2021-04-26 | 2021-08-13 | 上海齐耀动力技术有限公司 | Hot air engine power generation method and system |
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Application publication date: 20180525 |