CN103019220A - Heliostat zone control system for tower solar thermal plants - Google Patents
Heliostat zone control system for tower solar thermal plants Download PDFInfo
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- CN103019220A CN103019220A CN2012105899857A CN201210589985A CN103019220A CN 103019220 A CN103019220 A CN 103019220A CN 2012105899857 A CN2012105899857 A CN 2012105899857A CN 201210589985 A CN201210589985 A CN 201210589985A CN 103019220 A CN103019220 A CN 103019220A
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Abstract
The invention discloses a heliostat zone control system for tower solar thermal plants. The heliostat zone control system is used for zone control for heliostat devices in a mirror field of a tower solar thermal plant and comprises a master control unit, at least one zone control unit and at least one heliostat controller. The master control unit is used for controlling and managing all the heliostat devices in the mirror field. Each zone control unit controls all the heliostat controllers in the zone, where the zone control unit locates, according to a control command from the master control unit. Each heliostat device is provided with one heliostat controller, which controls the heliostat device according to a control command from the corresponding zone control unit. The heliostat zone control system is used for real-time control of the numerous heliostats in the mirror field of the large-scale tower solar thermal plant, and is flexible in structure, high in reliability and conducive to popularization and application of tower power plants.
Description
Technical field
The present invention relates to a kind of zone control system, particularly for the heliostat zone control system of tower type solar thermo-power station.
Background technology
Solar energy thermal-power-generating technology (English name Concentrating Solar Power, be called for short CSP) utilize large-area minute surface that solar radiation energy is reflexed on the heat collector, heat collector is the solar radiant energy energy transform into heat energy, and generates electricity by thermodynamic cycle process.As the important way of the extensive generating of sun power, solar energy thermal-power-generating has a series of obvious advantages.At first, the carbon emission amount of its Life cycle is very low, according to foreign study 18g/kWh is only arranged.In addition, this technology cost in existing solar energy generation technology is minimum, is easier to realize rapidly extensive industrialization.In addition, solar energy thermal-power-generating also has very strong and compatibility advantage existing thermal power station and network system.
The solar energy thermal-power-generating technology mainly contains following four kinds: trough type solar power generation, tower type solar energy thermal power generation, the generating of disc type solar energy heat and Fresnel solar energy thermal-power-generating.
Tower-type solar thermal power generating system adopts a plurality of plane mirrors to come converge sunlight, and these plane mirrors are called heliostat.Many heliostats distributions are around tower, form huge heliostat field, simultaneously sunshine is reflexed on the receiver, receiver is installed on the high tower, its collection area is very large, also can regard it as a huge imaging light-concentrating solar heat-collection device, so tower type solar heat collector optically focused is higher than very, the receiver operation temperature can reach more than thousand degree.Compare above-mentioned other three kinds of photo-thermal power generation technology, tower type solar energy thermal power generation does not need the long-distance pipe transmission system, and heat-energy losses reduces, and system effectiveness is high, is convenient to simultaneously store heat.Tower actuating medium available air, water or water vapor and fused salt etc.
Heliostat device is the vitals of tower type solar energy thermal power generation technology, is comprised of structures such as heliostat minute surface, drive unit, control module and supports, is used for the heat collector of sunshine reflect focalization to the heat absorption tower.For making solar radiation energy concentrate on central point on the heat collector, require heliostat to possess high reflectance and high settled date precision, this need to have the heliostat control system to realize the settled date of heliostat followed the tracks of to carry out high-precision monitoring and control.For example, application number is 200920149305.3, name is called in the Chinese patent application of " a kind of automatic control system of heliostat " and discloses a kind of automatic control system of heliostat, comprise host computer and the PLC programmable controller that is attached thereto and passes through its control, the control heliostat carries out double-axle rotation and movement in pitch orientation and azimuth direction.
At present, building or the generating capacity in built extensive tower type solar energy thermal power generation power station has all reached more than the 10MW level.Such as, the Spain PS20 power station of coming into operation in 2009 has the generating capacity of 20MW, equips 1,255 heliostat, and the minute surface area of each heliostat reaches 120 square metres.And the U.S. at the in the world maximum tower power station ISEGS designed installed capacity of building up to 392MW, take up an area 14.6 square kilometres, nearly 173,000 heliostats will be installed, sunlight is focused on about 137 meters high solar columns.
In these extensive tower power stations, to accurately control every heliostat, need to carry out a large amount of real-time Communication for Power and calculating to tracking mode and the data of every heliostat, such as real-time information such as the settled date tracking mode of every heliostat, impact point position, electrical fault information.Only have the accurate control that realizes simultaneously the heliostat of these One's name is legions, guarantee real-time and the accuracy of whole system, just can guarantee the long-time steady operation in tower power station, this has just proposed very high requirement to the heliostat control system.But corresponding, this also can raise the cost of heliostat control system.
Simultaneously, the Jing Chang in extensive tower power station design and arrange also increasingly sophisticated, some tower power station even can adopt multi-tower structure, also requiring has the heliostat control system of supporting similar labyrinth.
Guaranteeing how to reduce cost and become the problem in the urgent need to address in photo-thermal power generation field on the basis that heliostat control system basic function is achieved.
Summary of the invention
The objective of the invention is the some shortcomings part for present tower photo-thermal power station heliostat tracking control technology, a kind of low cost, reliable, efficient tower photo-thermal power station heliostat zone control system are provided.
To achieve these goals, the invention provides a kind of heliostat zone control system for the tower type solar thermo-power station, be used for the heliostat device 5 of the mirror field of tower type solar thermo-power station is carried out subregion control, comprise main control computer 1, district's control machine 3 and heliostat controller 4; Wherein,
Described main control computer 1 is used for all heliostat devices 5 in control and management mirror field;
Described district's control machine 3 has one at least, and each district's control machine 3 is controlled all heliostat controllers 4 under the subregion of place according to the control command that described main control computer 1 sends;
Described heliostat controller 4 has one at least, heliostat controller 4 of every heliostat device 5 configurations, the control command control heliostat device 5 that heliostat controller 4 sends according to described district's control machine 3.
In the technique scheme, also comprise data storage 2; Described data storage 2 is used for record and the data message of storing relevant heliostat device 5.
In the technique scheme, described main control computer 1 comprises heliostat tracking control module, heliostat administration module, partition management module and system management module etc.; Wherein,
Described heliostat follow the tracks of control module be used for control heliostat device 5 to following the tracks of day, can support automatically control and manually control;
Described heliostat administration module is used for heliostat device 5 is managed separately, comprises time synchronized, with heliostat device 5 playback and the attended operation that cleans heliostat device 5;
Described partition management module is used for the heliostat subregion is managed, and can carry out unified management to all heliostat devices 5 in the subregion simultaneously;
Described system management module is used for system information and user right are managed in interior system's operation.
In the technique scheme, described district's control machine 3 comprises heliostat tracking control module, heliostat administration module; Wherein,
What described heliostat followed the tracks of that control module stores heliostat devices 5 all in the subregion of place comprises longitude and latitude geographic factor, heat collector target location tracking parameter, calculate in real time the operation result of heliostat device 5 according to the astronomical formula of sun operation, corresponding control command is sent to described heliostat controller 4, finish the settled date by described heliostat controller 4 control heliostat devices 5 again and follow the tracks of action;
Described heliostat administration module is used for the heliostat device 5 in district's control machine 3 place subregions is carried out unified management.
In the technique scheme, described heliostat controller 4 comprises on the spot control module, network communication interface, control chip; Wherein,
Described on the spot control module is used for directly heliostat device 5 manually being controlled;
Described network communication interface is used for communicating with described district's control machine 3;
Described control chip is used for receiving the control command from district's control machine 3, and control heliostat device 5 is realized driving and the tracking of heliostat.
In the technique scheme, many heliostat devices 5 that the position is close and tracking parameter is consistent form a subregion, by 3 controls of Yi Tai district control machine, are convenient to carry out unified management.
In the technique scheme, be in same row and the consistent a plurality of heliostat devices 5 of horizontal direction control parameter form a subregion at the heat absorption tower in the tower type solar thermo-power station as the radial direction in the center of circle.
In the technique scheme, be in the consistent subregion of a plurality of heliostat devices 5 compositions of the control parameter on delegation and the pitch orientation at the concentric circles circular arc of the heat absorption tower in the tower type solar thermo-power station as the center of circle.
The invention has the advantages that:
The present invention adopts the multilayer control structure of master control and district's control, by heliostat and relevant organic whole of software and hardware structure, can realize reaching the high precision tracking control and management of several thousand heliostats, test through reality, efficiently, stable, reliable, easy to use, accumulated valuable technical foundation for realizing extensive power plant construction.
In addition, the present invention can adapt to Jing Chang control and the single tower multitower light field structure that has any amount heliostat neatly, brings good elasticity to heliostat control, heliostat network topology and light field design.
Description of drawings
Fig. 1 is heliostat zone control system of the present invention structural representation in one embodiment;
Fig. 2 is by single tower mirror field schematic diagram of fan-shaped layout subregion among the embodiment;
Fig. 3 is a main control computer control flow chart among the embodiment.
The drawing explanation
1 main control computer, 2 data storage, 3 districts control machine
4 heliostat controllers, 5 heliostat devices, 6 heat absorption towers
8 one row heliostat unit, 7 heliostat unit
Embodiment
Now describe the present invention by reference to the accompanying drawings.
Fig. 1 is tower power station heliostat zone control system of the present invention structural representation in one embodiment.This zone control system is used for each heliostat of the heliostat mirror field in tower power station is controlled.As shown in the figure, this zone control system comprises main control computer 1, district's control machine 3, data memory module 2 and heliostat controller 4, and wherein, described main control computer 1 has one, is used for all heliostat devices 5 in control and management mirror field; All heliostats in the described heliostat mirror field are divided into several subregions, and Yi Tai district control machine 3 is used for the heliostat controller 4 of one of them subregion is controlled; Described heliostat controller 4 is used for control heliostat device 5, heliostat controller 4 of every heliostat device 5 configurations; Described data memory module 2 is used for the relevant data of storage and all heliostat device 5.Described main control computer 1 is connected on each district's control machine 3, and described district's control machine 3 then is connected to the heliostat controller 4 that configures on each interior heliostat device 5 of this subregion.Described data memory module 2 directly is connected with main control computer 1.
The below is described further the modules in the zone control system.
District's control machine 3 is used for all heliostat devices 5 in the control and management district control machine 3 place subregions.Similar with main control computer 1, district's control machine 3 comprises heliostat tracking control module, heliostat administration module etc.Wherein, described heliostat is followed the tracks of the tracking parameters such as longitude and latitude geographic factor that control module stores heliostat devices 5 all in the subregion of place, heat collector target location, calculate in real time again the operation result of heliostat device 5 according to the astronomical formula of sun operation, corresponding control command is sent to heliostat controller 4, finish the settled date by heliostat controller 4 control heliostat devices 5 again and follow the tracks of action.This function is placed on the calculated amount that the benefit that realizes on district's control machine 3 has been to share main control computer 1, also falls and lacked Internet traffic, can not form system bottleneck; And each district's control machine 3 can have different heat collector target locations, the multiple different structures such as single tower of the tower power station Jing Chang of energy flexible adaptation or multitower.Described heliostat administration module is used for heliostat device 5 in district's control machine 3 place subregions is carried out unified management.
Heliostat controller 4 is used for directly control heliostat device 5 realization settled dates tracking.Heliostat controller 4 comprises on the spot control module, network communication interface, control chip.Wherein, described on the spot control module is used for directly heliostat device 5 manually being controlled; Described network communication interface is used for communicating with district's control machine 3; Described control chip is used for receiving the control command from district's control machine 3, and control heliostat device 5 is realized driving and the tracking of heliostat.
Described zone control system is mainly used in heliostat device 5 is controlled, and for the ease of understanding, the below is described further heliostat device 5.
In zone control system, how the heliostat in the mirror field being carried out subregion can exert an influence to effect, the efficient of heliostat control.How Jing Chang is carried out subregion below in conjunction with different situation explanations, thereby so that zone control system of the present invention adapts to different Jing Chang layouts.
When heliostat mirror field, the tower photo-thermal of design and establishing power station, take the heat absorption tower as the center of circle, heliostat can adopt fan-shaped layout partitioned mode or concentric circles layout partitioned mode in the mirror field.
As shown in Figure 2, in one embodiment, single tower Jing Chang adopts fan-shaped layout partitioned mode, i.e. each row heliostat longitudinal arrangement, and the tower 6 that is arranged in to absorb heat is on the radius in the center of circle.As shown in the figure, 7 is the combination of a heliostat controller 4 and a heliostat device 5, referred to as the heliostat unit; 8 is the such heliostat unit of row, has 8; This row heliostat unit 7 is close in position, and control parameter in the horizontal direction is consistent, they can be divided into a district, by 3 controls of Yi Tai district control machine, is convenient to carry out unified management.
In the embodiment of another single tower Jing Chang, the situation of concentric circles layout partitioned mode is opposite with fan-shaped layout partitioned mode, and every delegation heliostat unit 7 is transversely arranged, and the tower 6 that is arranged in to absorb heat is on the concentric circles circular arc in the center of circle.Similarly, this row heliostat unit 7 is close in position, and the control parameter on pitch orientation is consistent, they can be divided into a district, by 3 controls of Yi Tai district control machine, is convenient to carry out unified management.
In the embodiment of a multitower Jing Chang, a plurality of heat absorption towers 6 are arranged, on each many heliostat unit 7 of heat absorption tower 6 configuration, heliostat unit 7 absorb heat the heat collector of tower 6 with the sunshine transmitting focusing to the place in the mirror field.In this case, all heliostat unit 7 under the heat absorption tower 6 can be divided into a district or multi-region, the heliostat unit 7 that heliostat unit 7 in the same district is subordinated in 6, one districts of same heat absorption tower is controlled by Yi Tai district control machine 3, is convenient to carry out unified management.
More than be the description to heliostat zone control system of the present invention, below in conjunction with this system, take work order as example, the major control flow process of zone control system be described.Work order refers to control heliostat device 5 and enters and follow the tracks of sun state and with the order of solar light focusing to the heat collector of heat absorption tower 6.
As shown in Figure 3, zone control system of the present invention can help the user to realize using the heliostat device 5 of a subregion of main control computer 1 control to carry out work.
Step 101, user can select some subregions on main control computer 1, press play button; Main control computer 1 sends work order to district's control machine 3 of selected subregion;
After step 102, district's control machine 3 receive work order, calculate first the target location of all heliostat devices 5 under this subregion, again target location and work order are sent to heliostat controller 4;
Step 103, heliostat controller 4 use first the target location that receives to calculate level and luffing parameter that heliostat device 5 needs, send horizontal motor and the pitching motor of corresponding motion command to the heliostat device 5 again;
Step 104, heliostat device 5 are followed the tracks of the sun by order and are realized focusing on.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although with reference to embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. heliostat zone control system that is used for the tower type solar thermo-power station, it is characterized in that, be used for the heliostat device (5) of the mirror field of tower type solar thermo-power station is carried out subregion control, comprise main control computer (1), district's control machine (3) and heliostat controller (4); Wherein,
Described main control computer (1) is used for all heliostat devices (5) in control and management mirror field;
Described district's control machine (3) has one at least, and each district's control machine (3) is controlled all heliostat controllers (4) under the subregion of place according to the control command that described main control computer (1) sends;
Described heliostat controller (4) has one at least, every heliostat device (5) configuration heliostat controller (4), the control command control heliostat device (5) that heliostat controller (4) sends according to described district's control machine (3).
2. the heliostat zone control system for the tower type solar thermo-power station according to claim 1 is characterized in that, also comprises data storages (2); Described data storages (2) are used for record and the data message of storing relevant heliostat device (5).
3. the heliostat zone control system for the tower type solar thermo-power station according to claim 1 and 2, it is characterized in that, described main control computer (1) comprises heliostat tracking control module, heliostat administration module, partition management module and system management module etc.; Wherein,
Described heliostat follow the tracks of control module be used for control heliostat device (5) to following the tracks of day, can support automatically control and manually control;
Described heliostat administration module is used for heliostat device (5) is managed separately, comprises time synchronized, with heliostat device (5) playback and the attended operation that cleans heliostat device (5);
Described partition management module is used for the heliostat subregion is managed, and can carry out unified management to all heliostat devices (5) in the subregion simultaneously;
Described system management module is used for system information and user right are managed in interior system's operation.
4. the heliostat zone control system for the tower type solar thermo-power station according to claim 1 and 2 is characterized in that, described district's control machine (3) comprises heliostat tracking control module, heliostat administration module; Wherein,
What described heliostat followed the tracks of that control module stores heliostat devices (5) all in the subregion of place comprises longitude and latitude geographic factor, heat collector target location tracking parameter, astronomical formula according to sun operation calculates the operation result of heliostat device (5) in real time, corresponding control command is sent to described heliostat controller (4), finish the settled date by described heliostat controller (4) control heliostat device (5) again and follow the tracks of action;
Described heliostat administration module is used for the heliostat device (5) in the subregion of control machine (3) place, district is carried out unified management.
5. the heliostat zone control system for the tower type solar thermo-power station according to claim 1 and 2 is characterized in that, described heliostat controller (4) comprises on the spot control module, network communication interface, control chip; Wherein,
Described on the spot control module is used for directly heliostat device (5) manually being controlled;
Described network communication interface is used for communicating with described district's control machine (3);
Described control chip is used for receiving the control command from district's control machine (3), and control heliostat device (5) is realized driving and the tracking of heliostat.
6. the heliostat zone control system for the tower type solar thermo-power station according to claim 1 and 2, it is characterized in that, many the heliostat devices (5) that the position is close and tracking parameter is consistent form a subregion, by Yi Tai district control machine (3) control, be convenient to carry out unified management.
7. the heliostat zone control system for the tower type solar thermo-power station according to claim 6, it is characterized in that, be in same row and the consistent a plurality of heliostat devices (5) of horizontal direction control parameter form a subregion at the heat absorption tower in the tower type solar thermo-power station as the radial direction in the center of circle.
8. the heliostat zone control system for the tower type solar thermo-power station according to claim 6, it is characterized in that, be in the consistent subregion of a plurality of heliostat devices (5) composition of the control parameter on delegation and the pitch orientation at the concentric circles circular arc of the heat absorption tower in the tower type solar thermo-power station as the center of circle.
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