CN103713661B - A kind of method realizing heliostat speed change - Google Patents
A kind of method realizing heliostat speed change Download PDFInfo
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- CN103713661B CN103713661B CN201310725553.9A CN201310725553A CN103713661B CN 103713661 B CN103713661 B CN 103713661B CN 201310725553 A CN201310725553 A CN 201310725553A CN 103713661 B CN103713661 B CN 103713661B
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Abstract
The invention provides a kind of method realizing heliostat speed change, its step includes: the climatic informations such as heliostat mirror field is the finest, cloudy for the monitoring of step one, weather monitoring unit, rain, snow and strong wind, and climatic information is fed back to host computer；Step 2, host computer, according to heliostat mirror field climatic information, calculate rotating speed or the moment of torsion of prerun heliostat, and tachometer value or torque value and operation order are issued to heliostat controller；Step 3, heliostat controller control heliostat and realize different rotating speeds or moment of torsion runs after receiving the order of host computer, tackle heliostat mirror field weather conditions.The present invention can realize heliostat and reasonably run under its round-the-clock different operating state status, is possible not only to be greatly improved the work efficiency of heliostat, and can play protection generating equipment and energy-conservation effect.
Description
Technical field
The present invention relates to tower type solar power field, particularly relate to a kind of method realizing heliostat speed change.
Background technology
Solar energy is more and more applied as the regenerative resource of a kind of cleaning, and especially photo-thermal power generation technology is the later emerging solar utilization technique of photovoltaic power generation technology that continues.In several photo-thermal power generation technology, tower type solar energy thermal power generation is to use substantial amounts of heliostat to be gathered by sunlight on the heat extractor being arranged on heat absorption tower top, and heating working medium produces steam, and pushing turbine drives electrical power generators.Wherein, heliostat solar tracking campaign is one of key technology of tower type solar energy thermal power generation, the beam condensing unit that heliostat is made up of reflecting mirror, actuating device and control system thereof.The wherein actuating device main rotation being responsible for heliostat and location in heliostat system, its operation conditions directly determines the work efficiency of heliostat, thus affects the generating efficiency of whole system.
Heliostat is when solar tracking, and the rotating speed of heliostat is that the translational speed according to the sun draws, the most just can make reflection light motionless project heat absorption tower heat extractor on.But want fast at the rotating speed sometimes requiring heliostat, such as during solar tracking when encountering cloud block, particularly the translational speed of cloud layer quickly time part the most just heliostat in solar tracking can not quickly withdraw, heat extractor causes burning out because of the most overheated.The most such as running into vile weather (such as hail, strong wind etc.) during solar tracking, when needing urgent field, pass, heliostat can not return to zero-bit state or certain specific angle in the fastest speed, and minute surface is the most damaged.It addition, be different when of being supported on calm and strong wind when heliostat, the heliostat big moment of torsion of ether that remains unchanged when calm rotates, and wastes the energy.
Summary of the invention
Present invention aim at providing a kind of method realizing heliostat speed change, can only run with a certain constant speed with heliostat in solution prior art, different rotating speeds can not be realized under different situations, reduce the work efficiency of heliostat, also make the risk that some generating equipment is destroyed.
The present invention is a kind of method realizing heliostat speed change, comprises the following steps:
Step one: monitored and obtained the climatic information of heliostat mirror field by a weather monitoring unit, described climatic information is fed back to a host computer by described weather monitoring unit；
Step 2: described host computer is according to described climatic information, calculate rotating speed or the output moment of torsion of the heliostat of prerun, and by the speed change of described heliostat according to the rotating speed of the heliostat of described prerun or output moment of torsion or become torque command and be issued to certain heliostat controller；
Step 3: described heliostat controller receives the order that described host computer issues, and controls described heliostat change rotating speed or output moment of torsion operation, tackles the weather conditions of described heliostat mirror field.
Preferably, when the weather that described weather monitoring unit detects described heliostat mirror field is normal, described host computer calculates normal solar tracking speed and the output moment of torsion of described heliostat, and described heliostat controller receives the order that issues of described host computer and controls described heliostat and run with normal solar tracking speed.
Preferably, when described weather monitoring unit monitor heliostat need to promptly close field, cloud cover or other need described heliostat need to quickly run weather time, described host computer calculates the speed of service higher than normal solar tracking speed, and the described speed of service is handed down to described heliostat controller, described heliostat controller controls described heliostat and completes corresponding action within the corresponding time.
Preferably, when described weather monitoring unit monitor described heliostat mirror field be in the vile weather such as strong wind, heavy rain snow time, described host computer calculates the operation moment of torsion higher than normal solar tracking output moment of torsion, and described operation moment of torsion is issued to described heliostat controller, the described heliostat controller described heliostat of control is resisted different wind with the operation of described operation moment of torsion and is resisted.
It is preferred that the rotating speed of described heliostat includes orientation velocity of rotation and horizontally rotates speed.
It is preferred that described weather monitoring unit uses cloud monitoring camera.
It is preferred that described heliostat includes reflecting mirror, motor and drive mechanism；Gear and/or speed control unit it is additionally provided with on described heliostat,
Wherein, described gear is connected with described drive mechanism, and described heliostat controller controls described gear and regulates the rotating speed of described drive mechanism, thus regulates the rotating speed of described heliostat.
Wherein, described speed control unit is connected with described motor, and speed control unit described in described PC control regulates the rotating speed of described motor, thus regulates the output moment of torsion of described heliostat.
It is preferred that described gear can use mechanical speed change or hydraulic speed-changing or electrical variable speed.
It is preferred that described speed control unit uses speed regulator.
Due to the fact that the above technical scheme of employing, be allowed to compared with prior art, have the following advantages that and good effect:
(1) present invention can complete within a short period of time heliostat a certain action (such as: promptly close field, cloud cover or other when needing the state quickly run or during the harsh environmental conditions such as strong wind, heavy rain snow), realize heliostat and quickly realize speed change rotation, improve the work efficiency of heliostat, and the energy consumption of motor can be lowered, save the energy；
(2) present invention can realize heliostat emergency escape under specific circumstances, protects generating equipment；
(3) present invention also can realize heliostat stepless time adjustment, and easily controllable, it is not necessary to complicated gear.
Accompanying drawing explanation
In conjunction with accompanying drawing, by hereafter state detailed description, the above-mentioned and other feature and advantage of the present invention can be more clearly understood that, wherein:
Fig. 1 is bright heliostat solar tracking schematic diagram in the embodiment of the present invention；
Fig. 2 is that in the embodiment of the present invention, heliostat runs schematic diagram；
Fig. 3 is the flow chart realizing heliostat speed Control in the embodiment of the present invention.
Symbol description:
1-heliostat
11-reflecting mirror
12-drive mechanism
12a-azimuth drive
12b-horizontal conveyor device
13-fixed pedestal
2-absorbs heat tower
3-heat extractor
4-weather monitoring unit
5-host computer
6-heliostat controller
Detailed description of the invention
See the accompanying drawing illustrating the embodiment of the present invention, the present invention is described in more detail.But, the present invention can realize in many different forms, and should not be construed as the embodiment by herein proposing and limited.On the contrary, proposing these embodiments is to reach fully and complete disclosure, and makes those skilled in the art understand the scope of the present invention completely.In these accompanying drawings, for clarity sake, may be exaggerated layer and the size in region and relative size.
As shown in Figure 1-2, the operation principle of tower type solar power generation settled date mirror solar tracking is which illustrated.During solar tracking, daylight light is reflexed to be fixed on the heat extractor 3 at heat absorption tower 2 top by heliostat 1；Wherein, the mechanical part of heliostat 1 is mainly made up of reflecting mirror 11, drive mechanism 12 and fixed pedestal 13, and drive mechanism 12 includes realizing the azimuth drive 12a that orientation angles rotates and the horizontal conveyor device 12b realizing level angle rotation；Azimuth drive 12a and horizontal conveyor device 12b can rotate so that speed omega 1 and ω 2 is independent respectively, associated working can make the reflecting mirror 11 of heliostat 1 realize different three-dimensional perspectives, calculate translational speed and the angle of the sun according to solar tracking algorithm, realized the solar tracking action of heliostat by the rotary speed controlling drive mechanism 12.
In order to improve the work efficiency of generating, protection generating equipment and energy-conservation needs; generally require heliostat to run with different rotating speeds in the case of it at different weather; the invention provides a kind of method realizing heliostat speed change; realizing different velocities of rotation and output moment of torsion under different weather situation, it specifically comprises the following steps that
Step one, being monitored and obtained the climatic information of heliostat mirror field by a weather monitoring unit, climatic information is fed back to a host computer by weather monitoring unit；
Wherein, weather monitoring unit is arranged in heliostat mirror field, the equipment such as cloud monitoring camera specifically can be used to realize, be not restricted.Weather monitoring unit monitors the climatic informations such as heliostat mirror field interior such as fine, cloudy, rain, snow, strong wind, and this climatic information not only includes that weather conditions also include the data such as mirror field wind speed, and the climatic information of acquisition is fed back to a host computer by weather monitoring unit.
Step 2: host computer according to climatic information, calculates rotating speed or the output moment of torsion of the heliostat of prerun, and by the speed change of heliostat according to the rotating speed of the heliostat of prerun or output moment of torsion or become torque command and be issued to certain heliostat controller；
Concrete, host computer can be specially the equipment such as computer, host computer obtains the climatic information in weather monitoring, and calculate heliostat through the rotating speed of prerun under these weather conditions or output moment of torsion according to this climatic information by the related software in host computer, and by corresponding speed change or become torque command and be issued to certain heliostat controller；Wherein, weather monitoring unit 4 and host computer 5 may be used without other devices, be not restricted.Certainly, in some cases, shift command can artificially be issued, and need not be by the feedback of weather monitoring unit, during such as artificial field, needs urgent pass, the rotating speed issued can be arranged on host computer.List the prerun rotating speed of heliostat under several weather conditions in detail below or export moment of torsion:
(1) solar tracking speed
When heliostat is in normal solar tracking state, host computer provides normal solar tracking to hasten for heliostat.Solar tracking principle according to tower type solar power generation settled date mirror, owing to the sun is the most all moving, sunlight to be made the most all impinges upon on the heat extractor of heat absorption tower, this will make the space angle moment of heliostat minute surface follow the movement of the sun and change, and the normal solar tracking rotating speed calculating heliostat according to solar tracking algorithm is about 1r/min.
(2) cloud cover speed
During heliostat solar tracking, when cloud cover occurs, often need to withdraw part rapidly just at the heliostat of solar tracking, because the sun is out after cloud cover, if not withdrawing part heliostat, the sunlight light of heliostat reflection shines on heat extractor suddenly, thus causes the temperature of heat extractor to raise suddenly and overheated, easily causes heat extractor and burns out.Owing to the drift velocity of cloud layer is quickly, so often requiring that the sunlight light that heliostat reflects will withdraw heat extractor within several seconds, the rotating speed being calculated acquisition heliostat by host computer should be controlled at more than 10r/min.
(3) urgent pass field speed degree
When electric field runs into vile weather (such as weather such as hail, strong wind, heavy rain, severe snows), when needing urgent field, pass, at this moment requiring that heliostat returns to zero-bit state or certain specific angle in the fastest speed, protection minute surface will not damage.When closing field, the climatic information monitored according to weather monitoring unit, judge the time that heliostat is withdrawn.As mirror field has rainstorm weather after 30 seconds, it is desirable to closed field in 30 seconds, by calculating the rotating speed of heliostat to be controlled at more than 2r/min.
(4) moment of torsion that wind is anti-is resisted
Heliostat is under strong wind and calm two kinds of environmental working conditions, and the load resistance (i.e. wind resists) being subject to is different.When mirror field is calm, the wind that heliostat is subject to resists smaller, at this moment should reduce the power of heliostat to lower acting power consumption；When having strong wind when, wind is anti-very big, at this time should improve the moment of torsion of heliostat, to overcome the anti-acting of wind.Therefore, when heliostat mirror field is in strong wind or calm ambient condition, it is anti-that heliostat need to provide different output moments of torsion to make heliostat resist different wind.Under at Jing Chang without wind regime, when normal solar tracking, heliostat runs with certain moment of torsion of output day by day, but when at this time wind speed brings up to strong breeze suddenly, the wind torque resistant that heliostat is subject to increases, in order to meet normal solar tracking speed, and heliostat motor output to be improved moment of torsion.
Certainly, in actual moving process, also can use other rotating speed, not do at this and introduce one by one.Under different situations, azimuth drive 12a and horizontal conveyor device 12b with which kind of speed rotates, and depending on on-site actual situations to be seen, under different conditions, the rotating speed of heliostat can be calculated by the related software in host computer and obtain.
Step 3, heliostat controller receive the order that host computer issues, and control heliostat change rotating speed or output moment of torsion operation, tackle the weather conditions of heliostat mirror field.
The present invention uses above method can complete a certain action of heliostat within a short period of time, as promptly close field, cloud cover or other need the state quickly run time or during the harsh environmental conditions such as strong wind, heavy rain snow, realize heliostat and quickly realize speed change rotation, improve the work efficiency of heliostat, and the energy consumption of motor can be lowered, save the energy；It addition, the present invention can realize heliostat emergency escape under specific circumstances, protect generating equipment；The present invention also can realize heliostat stepless time adjustment, and easily controllable, it is not necessary to complicated gear.
The method of the realized heliostat speed change that the present invention provides mainly have employed following device: weather monitoring unit, host computer and heliostat controller, its each other and and heliostat between interconnected relationship or signal transmission relation, all with reference to the description in said method, here is omitted.In the present embodiment, heliostat includes reflecting mirror and the motor being attached thereto and drive mechanism；Being additionally provided with gear on heliostat, gear is connected with drive mechanism, and heliostat controller controls gear and carrys out the rotating speed of adjusting transmission mechanism, thus realizes the regulation of the rotating speed of heliostat.Wherein, gear can use mechanical speed change or the mode such as hydraulic speed-changing or electrical variable speed to realize.
In this embodiment, being additionally provided with speed control unit on heliostat, concrete speed control unit can use speed regulator to realize, and speed regulator is directly connected with motor, heliostat controller controls speed regulator and regulates the rotating speed of described motor, thus realizes the regulation of the output moment of torsion of heliostat.
With reference to Fig. 3, below as a example by the sun is by weather condition during cloud block, the method for changing speed of further instruction heliostat.
First, weather monitoring unit monitors the sun by cloud cover, and this climatic information is fed back to host computer.Heliostat shift command is issued to heliostat controller according to cloud block information by host computer.If the cloud layer that weather monitoring unit detects can block the heliostat in some corner of Jing Chang after 5 seconds, and the level angle of these heliostats at this time is 72 °, then host computer calculates the horizontal angle of the heliostat being blocked and is retracted into the rotating speed of zero-bit and should be 2.4r/min；Last heliostat controller controls the horizontal conveyor device 12b of heliostat with predetermined rotation speed operation to zero-bit.
In sum, the present invention is a kind of method realizing heliostat speed change, and its step includes: the climatic informations such as heliostat mirror field is the finest, cloudy for the monitoring of step one, weather monitoring unit, rain, snow and strong wind, and climatic information is fed back to host computer；Step 2, host computer, according to heliostat mirror field climatic information, calculate rotating speed or the moment of torsion of prerun heliostat, and tachometer value or torque value and operation order are issued to heliostat controller；Step 3, heliostat controller control heliostat and realize different rotating speeds or moment of torsion runs after receiving the order of host computer; tackle the heliostat mirror field weather conditions present invention to realize heliostat and reasonably run under its round-the-clock different operating state status; it is possible not only to be greatly improved the work efficiency of heliostat, and protection generating equipment and energy-conservation effect can be played.
The preferred embodiment of the present invention is only intended to help to illustrate the present invention.Preferred embodiment does not has all of details of detailed descriptionthe, is not intended to the detailed description of the invention that this invention is only described yet.Obviously, according to the content of this specification, can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is to preferably explain the principle of the present invention and actual application, so that skilled artisan can utilize the present invention well.The present invention is only limited by claims and four corner thereof and equivalent.
Claims (8)
1. the method that can realize heliostat speed change, it is characterised in that comprise the following steps:
Step one: monitored and obtained the climatic information of heliostat mirror field by a weather monitoring unit, described climatic information is fed back to a host computer by described weather monitoring unit；
Step 2: described host computer is according to described climatic information, calculate rotating speed or the output moment of torsion of the heliostat of prerun, and by the speed change of described heliostat according to the rotating speed of the heliostat of described prerun or output moment of torsion or become torque command and be issued to certain heliostat controller；
Step 3: described heliostat controller receives the order that described host computer issues, and controls described heliostat change rotating speed or output moment of torsion operation, tackles the weather conditions of described heliostat mirror field；
Described heliostat includes reflecting mirror, motor and drive mechanism；Gear and/or speed control unit it is additionally provided with on described heliostat,
Wherein, described gear is connected with described drive mechanism, and described heliostat controller controls described gear and regulates the rotating speed of described drive mechanism, thus regulates the rotating speed of described heliostat；
Wherein, described speed control unit is connected with described motor, and speed control unit described in described PC control regulates the rotating speed of described motor, thus regulates the output moment of torsion of described heliostat.
The method realizing heliostat speed change the most according to claim 1, it is characterized in that, when the weather that described weather monitoring unit detects described heliostat mirror field is normal, described host computer calculates normal solar tracking speed and the output moment of torsion of described heliostat, and described heliostat controller receives the order that issues of described host computer and controls described heliostat and run with normal solar tracking speed.
The method realizing heliostat speed change the most according to claim 2, it is characterized in that, when described weather monitoring unit monitor heliostat need to promptly close field, cloud cover or other need described heliostat quickly run weather time, described host computer calculates the speed of service higher than normal solar tracking speed, and the described speed of service is handed down to described heliostat controller, described heliostat controller controls described heliostat and completes corresponding action within the corresponding time.
The method realizing heliostat speed change the most according to claim 2, it is characterized in that, when described weather monitoring unit monitor described heliostat mirror field be in strong wind, heavy rain snow vile weather time, described host computer calculates the operation moment of torsion higher than normal solar tracking output moment of torsion, and described operation moment of torsion is issued to described heliostat controller, the described heliostat controller described heliostat of control is resisted different wind with the operation of described operation moment of torsion and is resisted.
Heliostat method for changing speed the most according to claim 1, it is characterised in that the rotating speed of described heliostat includes orientation velocity of rotation and horizontally rotates speed.
The method realizing heliostat speed change the most according to claim 1, it is characterised in that described weather monitoring unit uses cloud monitoring camera.
The method realizing heliostat speed change the most according to claim 1, it is characterised in that described gear can use mechanical speed change or hydraulic speed-changing or electrical variable speed.
The method realizing heliostat speed change the most according to claim 1, it is characterised in that described speed control unit uses speed regulator.
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2013
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| JPH11307801A (en) * | 1998-04-20 | 1999-11-05 | Honda Motor Co Ltd | Sunlight tracking apparatus |
| CN201263130Y (en) * | 2008-08-18 | 2009-06-24 | 彩熙太阳能环保技术(天津)有限公司 | Sun tracking device for solar generating device |
| US8295989B2 (en) * | 2009-02-03 | 2012-10-23 | ETM Electromatic, Inc. | Local power tracking for dynamic power management in weather-sensitive power systems |
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Effective date of registration: 20170726 Address after: 310053 Binjiang District City, Hangzhou Province, No. six and No. 307 Road, building 8, layer 9, layer 1, Patentee after: Zhejiang Supcon Solar Energy Technology Co., Ltd. Address before: 3 floor, 313 floor, new canteen, Delingha City, Haixi Mongol and Tibetan Autonomous Prefecture, Qinghai, 817000 Patentee before: QINGHAI SUPCON SOLAR ENERGY POWER GENERATION CO., LTD. |
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Address after: 310018 1-2603, No. 501, No. 2 street, Baiyang street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee after: Zhejiang Kesheng Technology Co.,Ltd. Address before: 310053 8 and 9 floors of No. 307 Liuhe Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG SUPCON SOLAR ENERGY TECHNOLOGY Co.,Ltd. |