CN101938142B - Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof - Google Patents
Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof Download PDFInfo
- Publication number
- CN101938142B CN101938142B CN201010265388XA CN201010265388A CN101938142B CN 101938142 B CN101938142 B CN 101938142B CN 201010265388X A CN201010265388X A CN 201010265388XA CN 201010265388 A CN201010265388 A CN 201010265388A CN 101938142 B CN101938142 B CN 101938142B
- Authority
- CN
- China
- Prior art keywords
- tracking
- photovoltaic
- weight average
- electric weight
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title abstract description 8
- 238000005070 sampling Methods 0.000 claims description 36
- 238000010248 power generation Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 23
- 230000011218 segmentation Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- FNMKZDDKPDBYJM-UHFFFAOYSA-N 3-(1,3-benzodioxol-5-yl)-7-(3-methylbut-2-enoxy)chromen-4-one Chemical compound C1=C2OCOC2=CC(C2=COC=3C(C2=O)=CC=C(C=3)OCC=C(C)C)=C1 FNMKZDDKPDBYJM-UHFFFAOYSA-N 0.000 claims description 3
- 101100433727 Caenorhabditis elegans got-1.2 gene Proteins 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 28
- 230000005540 biological transmission Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000005622 photoelectricity Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 102100032533 ADP/ATP translocase 1 Human genes 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 101000823089 Equus caballus Alpha-1-antiproteinase 1 Proteins 0.000 description 1
- 101000768061 Escherichia phage P1 Antirepressor protein 1 Proteins 0.000 description 1
- 241001468872 Fumagospora capnodioides Species 0.000 description 1
- 101000796932 Homo sapiens ADP/ATP translocase 1 Proteins 0.000 description 1
- 101000651211 Homo sapiens Transcription factor PU.1 Proteins 0.000 description 1
- 102100027654 Transcription factor PU.1 Human genes 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- 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
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a synchronization photovoltaic power generating system with a solar azimuth tracking device and a tracking method thereof. The system comprises a local range ZigBee wireless network, a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) 3G public network and a remote monitoring center. The ZigBee wireless network comprises one or more ZigBee nodes of a photovoltaic power generating subsystem and a ZigBee coordinator of a photovoltaic power generating main system, and the ZigBee coordinator is also used as a ZigBee/TD-SCDMA gateway; working condition data of a power generating system are classified according to the operation and maintenance requirements or uploaded through a TD-SCDMA 3G in real time or temporarily stored in the coordinator to be acquired in an off-line way by an inspector during the inspection; the remote monitoring center sets sunny, cloudy and rainy working modes of the tracking device and the rough and fine tracking accuracy in the sunny mode; astronomy tracking and tracking on generated energy of the photovoltaic power generating system are adopted in the solar azimuth tracking device; and a stepping motor and a step subdividing technology are adopted in the mechanical drive of the solar azimuth tracking device. The tracking device is merged into the photovoltaic power generating system, therefore, the reliability and the tracking accuracy of the system are improved and the operation and maintenance cost is lowered.
Description
Technical field
The solar azimuth that the present invention relates to photovoltaic generating system is followed the tracks of, and relates in particular to a kind of grid-connected photovoltaic power generation system with the solar azimuth tracking means and tracking.
Background technology
Along with China's sustained and rapid development of economy, energy supply situation day is becoming tight, no matter be to increase domestic energy supply or utilize foreign resources, all face immense pressure, the rapid growth of energy demand is to Gong amount, the environment ability to take the burden of resource, and national energy security has all proposed stern challenge.In August, 2007, " Chinese regenerative resource Long-and Medium-term Development planning " (hereinafter to be referred as " planning ") issuing and implementation, " planning " is devoted to the utilization of the renewable energy resources, develops the substitute of fossil energy with all strength.Wherein, solar energy has reserves and enriches, need not transportation, pollution-free three large advantages and extensively concerned, and " planning " clear and definite desert generates electricity by way of merging two or more grid systems and is the emphasis of photovoltaic generation; But solar energy also has two shortcomings: the one, and energy density is low; The 2nd, the uncertainty of intensity and direction, and the intrinsic intermittence of illumination.In a word, photovoltaic generation industrialization basis is better, and what need to be resolved hurrily is a high cost difficult problem.
The energy output of grid-connected photovoltaic system depends on the efficient of solar irradiance, solar panel and inverter.The transformation efficiency of commercialization cell panel is up to 15.7%-19.2%, improves conversion ratio under the prior art condition very difficult; The inverter conversion efficiency is up to more than 90%, and room for promotion is limited, and adopting the solar azimuth tracking technique to obtain solar energy as much as possible is the effective way that increases the photovoltaic system energy output.
At present, the sun orientation automatic tracking that uses in the photovoltaic generating system mainly contains following three kinds of methods: photoelectric tracking, and astronomical the tracking, photoelectricity is followed the tracks of in conjunction with astronomy.Photoelectric tracking adopts the four-quadrant light sensor to detect solar azimuth mostly, and control tracking means sun-tracing belongs to closed-loop control; The photoelectric tracking precision is high, but can occur blind walk in the cloudy situation, and long-time stability that consistency, regular maintenance, the signal of light sensor are processed etc. all propose to be close to harsh requirement.The astronomical relative motion law of following the tracks of according to the earth and the sun calculates the solar motion track and follows the tracks of, and belongs to open loop control; The astronomical tracking need not transducer, but has accumulated error; Consider the reliability of photovoltaic power generation apparatus supporting structure, adopting horizontal coordinate (sun altitude and azimuth) is the main flow scheme of generally acknowledging in the astronomical tracking.Photoelectricity is followed the tracks of then in conjunction with astronomy photoelectricity and astronomical the tracking is combined, and dual mode complements one another.The representative studies achievement of sun orientation automatic tracking technology is as follows:
1. patent of invention " large-scale windproof from motion tracking sun lighting equipment " (patent No. ZL02112553.8) proposes sun altitude and azimuthal astronomical tracking.
2. patent of invention " solar automatic tracking circuit " (application number 200610116616.0) proposes to adopt the photoelectric tracking method of light sensor.
3. patent of invention " a kind of sun orientation automatic tracking method and device for photovoltaic generation " (application number 200910152899.8) proposes the round-the-clock two-dimentional sun orientation automatic tracking method that photoelectric tracking and solar motion track following combine.
4. patent of invention " based on the automatic tracking type photovoltaic power station monitoring system of wireless network " (application number 200910153384.x), proposition is adopted independently, and the light signal transmitter obtains sunlight intensity, sunlight angle-data, through ZigBee-network distribution transmitter tracking data, ZigBee is the running parameter of collection photovoltaics Blast Furnace Top Gas Recovery Turbine Unit (TRT) simultaneously, and through the GPRS network teletransmission to Surveillance center.
Above-mentioned technology path of benefiting our pursuits, direction are correct, improve and further perfect necessity but still exist.
At first, existing solar azimuth is followed the tracks of and is sticked to tracking means itself fully, and the System Engineering Design theory of science is vacant; The solar azimuth tracking means only is a unit of photovoltaic generating system, follow the System Engineering Design theory, tracking means ought to be dissolved into and carry out global design in the photovoltaic generating system--the solar azimuth tracking is carried out in each the unit collaborative work in the system, draws more reasonable effective solution case.
Secondly, from the existing photoelectric tracking technology of overall situation close examination of photovoltaic generating system, obviously the solar panel energy output of photovoltaic generating system controller collection is more reasonable, simpler and more direct as the direct basis of following the tracks of.The complex art economic index of more various photovoltaic generation modes, " planning " is with the emphasis of desert grid-connected photovoltaic power generation as development; In the desert Environment, the Stability and dependability of existing photoelectric tracking technology can't effectively be guaranteed.The reasons are as follows: the consistency and the long-term consistency that guarantee the four-quadrant light sensor are by no means easy, and sensor signal amplifying and conditioning circuit also requires to have good consistency, and it is more difficult that technology realizes; The light sensor normal operation of desert area need to be eliminated sand and dust and hide interference, and these are several without possibility in engineering construction and O﹠M; Therefore, should select solar panel energy output outside the follow-up mechanism as following the tracks of foundation, can solve simultaneously the cloud noise difficult problem of long-term puzzlement photoelectric tracking technology according to the variation of energy output.
Its three, grid-connected photovoltaic power generation system mostly is under the pattern of unattended operation, regular visit and moves, so the logical Xin technology of network is the necessary condition of photovoltaic generating system remote monitoring; Remote monitoring center has complete instrument and meter, in real time accurate meteorological data, the complete well-trained engineer of specialty, by remote monitoring center but not the solar azimuth tracking means determines its mode of operation (fine, cloudy, rain pattern), demonstrated fully the science of System Engineering Design theory.Fine solar irradiation has very important meaning to the contribution of energy output, but the fine different periods contribution of energy output is differed greatly, so the thickness tracking accuracy should be treated, be considered to the different periods that solar azimuth is followed the tracks of under fine pattern with a certain discrimination.
The 4th, GPRS belongs to the 2.5G communication technology, has listed developmental limitation in the planning of national Ministry of Industry and Information, and the bandwidth of 2.5G, and speed is lower, and expense is higher, and therefore using TD-SCDMA technology to substitute 2.5G is the certainty of technological progress; A large amount of floor datas of grid-connected photovoltaic power generation generation in service are simultaneously all uploaded in real time by public network and can be caused communication cost to increase severely, and require can adopt real-time online to upload and patrol and examine the off-line collection and gather technology the floor data classification according to O﹠M.
At last, the machine driving of sun orientation automatic tracking device is too much secondary, such as the flexible transmission scheme of the low-speed DC Dian machine Dai Dong Silk bar of patent " solar energy photovoltaic generating automatic tracking system " (application number 200910038907.6), the transmission mechanism that the motor of patent " based on the single-chain transmission synchronous sun tracking lightseeking missile device of running track from sun to earth " (application number 200910147931.3), spur gear, chain, sprocket wheel etc. form; Transmission is too much, and reliability and the tracking accuracy of transmission mechanism all caused negative effect.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of grid-connected photovoltaic power generation system with the solar azimuth tracking means and tracking are provided.
ZigBee wireless network three parts that comprise remote monitoring center, TD-SCDMA3G public network and subrange with the grid-connected photovoltaic power generation system of solar azimuth tracking means; The ZigBee wireless network is comprised of the ZigBee node of one or more photovoltaic generation subsystems and the ZigBee telegon of photovoltaic generation main system, the ZigBee telegon of photovoltaic generation main system comprises controller main control module S3C2440, electric energy metering module ADE7169, stepping motor driver module TA8435, TD-SCDMA wireless module TDM330, ZigBee telegon communication module CC2430 and wireless USB module CYWUSB6935, the ZigBee node of photovoltaic generation subsystem comprises main control module S3C2440, ZigBee node communication module CC2430 and electric energy metering module ADE7169, each photovoltaic generating system subsystem is by the ZigBee wireless network exchange message of subrange; Remote monitoring center links to each other with TD-SCDMA 3G public network by the GGSN gateway of Internet, operator, and the GGSN gateway carries out protocol conversion to Internet, TD-SCDMA 3G public network packet; TD-SCDMA 3G public network is through the ZigBee/TD-SCDMA of photovoltaic generation main system gateway accessing ZigBee wireless network, and the ZigBee telegon of photovoltaic generation main system doubles as the ZigBee/TD-SCDMA gateway; The internal module annexation of photovoltaic generation main system is: photovoltaic array successively with the converter that is incorporated into the power networks, electrical network links to each other, photovoltaic array successively with stepping motor, stepping motor driver module TA8435 links to each other, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, main control module S3C2440 respectively with stepping motor driver module TA8435, converter is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee telegon communication module CC2430, wireless USB module CYWUSB6935, TD-SCDMA wireless module TDM330 links to each other, and through TD-SCDMA wireless module TDM330 access TD-SCDMA 3G public network; The internal module annexation of photovoltaic generation subsystem is: photovoltaic array links to each other with the converter that is incorporated into the power networks, electrical network successively, photovoltaic array links to each other with stepping motor, stepping motor driver module TA8435 successively, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, and main control module S3C2440 links to each other with stepping motor driver module TA8435, the converter that is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee node communication module CC2430 respectively.
The solar azimuth tracking of desert regions grid photovoltaic power generation comprises the steps:
1) remote monitoring center is set fine, cloudy, the rain mode of operation of the solar azimuth tracking means of desert regions grid photovoltaic power generation, and the thickness tracking accuracy under the fine mode of operation, and be sent to the ZigBee wireless network by the ZigBee/TD-SCDMA gateway of Internet, GGSN gateway, TD-SCDMA 3G public network, photovoltaic generation main system; The ZigBee telegon that doubles as the ZigBee/TD-SCDMA gateway is transmitted tracking mode of operation and the tracking accuracy that remote monitoring center is set, tracking mode of operation and tracking accuracy operation that photovoltaic generation main system and photovoltaic generation subsystem are set according to remote monitoring center, the ZigBee telegon is comprised of photovoltaic generation main system main control module S3C2440 and ZigBee telegon communication module CC2430;
2) the solar azimuth tracking means of desert regions grid photovoltaic power generation stops to follow the tracks of under the rainy day mode of operation, photovoltaic array goes to sun altitude and the azimuth of setting, wherein solar azimuth adopts solar azimuth the previous day, and sun altitude adopts following computing formula:
H＝90°-|μ+/-β|
In the formula, μ is local geographic latitude;
β is the subsolar point geographic latitude;
3) the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts astronomical the tracking under the cloudy mode of operation, the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts the tracking of astronomical tracking and photovoltaic generating system energy output under the fine mode of operation, determine sun altitude and the azimuth of photovoltaic array, initial, the termination time of tracking are set by remote monitoring center; The controller of photovoltaic generation main system and photovoltaic generation subsystem is through stepping motor driver module TA8435, output elevation angle and the required electric impulse signal of stepping motor angular displacement corresponding to azimuth;
Wherein adopt astronomical the tracking: according to the relative motion law of the earth and the sun, determine sun altitude and the azimuth of photovoltaic array, the stepping motor tracking accuracy is selected default step angle, and the computing formula of astronomical tracking horizontal coordinate is as follows:
In the formula, α--sun altitude
δ--declination angle, every monthly variation 8 degree
ω--hour angle per hour changes 15 degree
Consider solar azimuth tracking energy consumption, drive unit life-span, and tracking accuracy and generating the relationship between quantities composite factor, astronomical tracking cycle was got 1 hour;
Adopt the photovoltaic generating system energy output to follow the tracks of: remote monitoring center is set the tracking initiation time T of tracking means
s, termination time T
eSlightly, carefully follow the tracks of period T
d, T
m, and corresponding variable step tracking accuracy value: t ∈ T
dThe thick tracking period selected 1/2 segmentation step angle, and tracking cycle is 1800 seconds; T ∈ T
mThe thin tracking period selected 1/4 segmentation step angle, and thin tracking cycle is 900 seconds;
The electric energy metering module ADE7169 of photovoltaic generation subsystem gathers voltage, the current signal of photovoltaic array, and the generating value of output is kept in the memory of controller; The sampling period of electric energy metering module ADE7169 is 1 second, and the mean value of 3 energy output was defined as " electric weight average " in the middle of every continuous sampling 5 times, rejecting maximin were got, and " electric weight average " also is kept in the memory of controller;
T ∈ T
dFollow the tracks of the period for thick, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/2 segmentation step angle every the controller of 1800 seconds, photovoltaic generation main system and photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain the electric weight average time, every one step of tracking, at first compare with the electric weight average of reposition and the maximum electric weight average in front 1800 seconds, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion, electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if greater than the electric weight average of a upper position sampling, then rotate 1/2 step angle, and if continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates;
T ∈ T
mFollow the tracks of the period for thin, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/4 segmentation step angle every the controller of 900 seconds, photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain " electric weight average " time sum, every one step of tracking, at first compare with the electric weight average of reposition and the maximum electric weight average in front 900 seconds, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion; Behind selected sun altitude and the azimuth, according to " electric weight average " maximal criterion, controller is done further to follow the tracks of with 1/4 segmentation step angle through stepping motor driver module TA8435; Electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if the electric weight average greater than a upper position sampling, then rotate 1/4 step angle, if and continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates.
The present invention compares with background technology, and the beneficial effect that has is:
1) is different from existing astronomy in conjunction with the solar azimuth tracking of photoelectricity, the present invention is based on the System Engineering Design theory--each unit of cooperative system is implemented solar azimuth and is followed the tracks of, astronomical tracking in conjunction with the photovoltaic generating system energy output is proposed, namely the controller from photovoltaic generating system extracts the energy output parameter as following the tracks of foundation, eliminate this source of trouble of photoelectric tracking in the desert Environment, solved simultaneously the cloud noise difficult problem of long-term puzzlement photoelectric tracking technology; Both reduce cost and O﹠M requirement, improved again reliability and the tracking accuracy of system.
2) by the remote monitoring center that has complete instrument and meter, in real time accurate meteorological data, the expert that does some training very often, it is fine, cloudy, the rain mode of operation and solar azimuth tracking means non-indigenous is set, and the thickness tracking accuracy under the fine mode of operation; Broken through tracking means has been isolated out the separately conventional thought of design from photovoltaic generating system, simplified the function of solar azimuth tracking means in the desert Environment, further improved reliability and the tracking accuracy of system.
3) communicate by the ZigBee wireless network between the photovoltaic generation subsystem, adopt the intermittent duty of timing wake-up, saves energy; The double ZigBee/TD-SCDMA gateway of doing of the telegon of ZigBee wireless network; Communicate by TD-SCDMA 3G public network and remote monitoring center, increased data broadband and transmission rate, reduced communication cost.
4) the photovoltaic generating system floor data is classified by the O﹠M requirement, or uploads in real time through TD-SCDMA 3G public network, or the off-line collection when patrolling and examining of temporary telegon; Adopt TD-SCDMA 3G public network real-time online to upload with off-line this locality and patrol and examine the strategy that Wireless USB gathers floor data, reduced floor data when satisfying the O﹠M requirement and gathered expense.
5) machine driving of tracking means adopts stepping motor, and the machine driving that has reduced the solar azimuth tracking means is secondary; Introduce the stepper angle fraction technology in the stepping motor, satisfied the different accuracy requirement that thickness is followed the tracks of under astronomical tracking and the fine mode of operation; Reliability and the tracking accuracy of system are got a promotion again.
Description of drawings
Fig. 1 is the grid-connected photovoltaic power generation system structural representation with the solar azimuth tracking means;
Fig. 2 is the ZigBee telegon structured flowchart of photovoltaic generation main system of the present invention;
Fig. 3 is the ZigBee telegon flow chart of photovoltaic generation main system of the present invention;
Fig. 4 is the ZigBee node structured flowchart of photovoltaic generation subsystem of the present invention;
Fig. 5 is ZigBee inside modules function realizing circuit figure of the present invention;
Fig. 6 is the solar azimuth tracking flow chart of desert regions grid photovoltaic power generation.
Embodiment
As shown in Figure 1, ZigBee wireless network three parts that comprise remote monitoring center, TD-SCDMA 3G public network and subrange with the desert regions grid photovoltaic power generation of solar azimuth tracking means; The ZigBee wireless network is comprised of the ZigBee node of one or more photovoltaic generation subsystems and the ZigBee telegon of photovoltaic generation main system, the ZigBee telegon of photovoltaic generation main system comprises controller main control module S3C2440, electric energy metering module ADE7169, stepping motor driver module TA8435, TD-SCDMA wireless module TDM330, ZigBee telegon communication module CC2430 and wireless USB module CYWUSB6935, the ZigBee node of photovoltaic generation subsystem comprises main control module S3C2440, ZigBee node communication module CC2430 and electric energy metering module ADE7169, each photovoltaic generating system subsystem is by the ZigBee wireless network exchange message of subrange; Remote monitoring center links to each other with TD-SCDMA 3G public network by the GGSN gateway of Internet, operator, and the GGSN gateway carries out protocol conversion to Internet, TD-SCDMA 3G public network packet; TD-SCDMA 3G public network is through the ZigBee/TD-SCDMA of photovoltaic generation main system gateway accessing ZigBee wireless network, and the ZigBee telegon of photovoltaic generation main system doubles as the ZigBee/TD-SCDMA gateway; The internal module annexation of photovoltaic generation main system is: photovoltaic array successively with the converter that is incorporated into the power networks, electrical network links to each other, photovoltaic array successively with stepping motor, stepping motor driver module TA8435 links to each other, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, main control module S3C2440 respectively with stepping motor driver module TA8435, converter is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee telegon communication module CC2430, wireless USB module CYWUSB6935, TD-SCDMA wireless module TDM330 links to each other, and through TD-SCDMA wireless module TDM330 access TD-SCDMA 3G public network; The internal module annexation of photovoltaic generation subsystem is: photovoltaic array links to each other with the converter that is incorporated into the power networks, electrical network successively, photovoltaic array links to each other with stepping motor, stepping motor driver module TA8435 successively, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, and main control module S3C2440 links to each other with stepping motor driver module TA8435, the converter that is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee node communication module CC2430 respectively.
As shown in Figure 2, the ZigBee telegon of described photovoltaic generation main system comprises controller main control module S3C2440, electric energy metering module ADE7169, stepping motor driver module TA8435, TD-SCDMA wireless module TDM330, ZigBee telegon communication module CC2430 and wireless USB module CYWUSB6935; TD-SCDMA wireless module TDM330 links to each other by the usb interface module of USB interface with controller main control module S3C2440, the pin 1 of usb interface module connects+5V voltage, pin 1 successively with electric capacity c1, link to each other, pin 4,5,6 ground connection, pin 2 successively with resistance R 1, resistance R 3, link to each other, pin 3 successively with resistance R 2, resistance R 4, link to each other, the P12 of main control module core board S3C2440, N11 pin link to each other with the intermediate point of intermediate point, resistance R 2 and the R4 of resistance R 1 and R3 respectively; K9, the P9 of main control module core board S3C2440, U13, L9 pin link to each other with the 13rd, 14,15,16 pins of ZigBee telegon communication module CC2430 respectively; H16, the N9 of main control module core board S3C2440, E3, R11, K10, L11, T9 pin join with the 14th, 21,22,23,24,25,33 pins of wireless USB module CYWUSB6935 respectively; T10, the J10 of main control module core board S3C2440, K14 pin link to each other with the 5th, 8,36 pins of electric energy metering module ADE7169 respectively; K2, the K3 of main control module core board S3C2440, J7, K5, K6 link to each other with the 5th, 6,7,8,9 pins of stepping motor driver module TA8435 respectively.S3C2440 receives/sends data by serial ports SPI0 and SPI1 and CC2430, CYWUSB6935 respectively, and its pin U13, E3 are as the GPIO port, and when pin U13 set low, CC2430 chip SPI slave signal was effective, and the ZigBee module activates; When pin E3 set low, CYWUSB6935 chip SPI slave signal was effective, and wireless USB module CYWUSB6935 activates.S3C2440 carries out serial communication by pin RXD, electric energy metering module ADE7169 by the TXD pin, and the pin T10 of S3C2440 enables electric energy metering module ADE7169, and the pin 8 of electric energy metering module ADE7169 triggers S3C2440 and produces interruption.The GPIO pin K2 of S3C2440, K5, K6 link to each other with the pin 5,8,9 of stepping motor driver module TA8435 respectively, control step motor positive and inverse and working method, the TOUT3 pin K3 of S3C2440 links to each other with the pin 6,7 of stepping motor driver module TA8435 respectively with TOUT2 pin J7, the input of PWM control step motor pulses.
The duty parameter that the ZigBee node of ZigBee telegon inquire-receive photovoltaic generation subsystem is uploaded, double as the ZigBee/TD-SCDMA gateway simultaneously, transmit the solar azimuth that remote monitoring center passes down and follow the tracks of control command; The ZigBee telegon is classified by the O﹠M requirement to the photovoltaic generating system floor data, by TD-SCDMA wireless module TDM330 access TD-SCDMA, the important duty parameter of real-time teletransmission photovoltaic generating system, remote monitoring center links to each other with the GGSN gateway of operator by Internet, receives online the important duty parameter that photovoltaic generating system is uploaded; General duty parameter inspector hand-hold wireless USB collector carries out collection in worksite by wireless USB module CYWUSB6935, timing, adopts offline mode to gather to remote monitoring center.
The electric energy metrical part not only will be measured by the electric flux after the inverter conversion and harmonic content etc., but also to monitor solar irradiation, solar cell plate temperature, solar battery array column voltage, battery tension, solar cell array electric current, battery current by the information that gathers various transducers, be the data acquisition system of a perfect in shape and function.Electric energy metering module adopts the ADE7169 of U.S. mould device company as electric energy computation chip, this electric energy computation chip carries DSP and enhancement mode 8052MCU, and electric energy measurement kernel flash memory, LCD driving, real-time clock and intelligent battery management circuit in microprocessor, sheet of ADI company maturation are combined.The voltage signal that voltage sensor gathers, after filtering, send into ADE7169 by 49 pin and 50 pin, obtain current signal is sent into ADE7169 after filtering 52 pin and 53 pin by current sensor equally, carry out the energy calculate of active power, reactive power and apparent power, and the measurement of voltage effective value (RMS) and current effective value RMS.
As shown in Figure 3, treat to ZigBee module after powering among the figure, the TD-SCDMA module, wireless USB module CYWUSB6935 and stepping motor driver module TA8435 initialization are finished, mode of operation and thickness tracking parameter that main control module S3C2440 receiving remote Surveillance center sends, and transmit the trace command of remote monitoring center to the photovoltaic generation subsystem, the duty parameter that main control module S3C2440 receives and storage photovoltaic generation subsystem is uploaded subsequently, floor data is classified by the O﹠M requirement, important duty parameter is uploaded in real time through TD-SCDMA, off-line collection when the temporary ZigBee telegon of non-important parameter is patrolled and examined by the inspector; Duty parameter is finished dealing with and is back to mode of operation and the thickness tracking parameter step that receiving remote Surveillance center sends again.Important duty parameter comprises stepping motor abnormal voltage, current value, and the photovoltaic array temperature value is by the statistics of O﹠M requirement generating value (such as energy output per hour etc.), the fault message of finding during the controller self check etc.
As shown in Figure 4, the ZigBee node of described photovoltaic generation subsystem comprises controller main control module S3C2440, ZigBee node communication module CC2430, electric energy metering module ADE7169 and stepping motor driver module TA8435; Voltage sensor gathers voltage signal and links to each other with the 49th, 50 pins of ADE7169 after filtering, current sensor obtains current signal and links to each other with the 52nd, 53 pins of ADE7169 after filtering, DSP in the electric energy metering module ADE7169 links to each other with enhancement mode 8052MCU, and the 5th, 8,36 pins of ADE7169 link to each other with T10, J10, the K14 pin of main control module core board S3C2440 respectively; K2, the K3 of main control module core board S3C2440, J7, K5, K6 link to each other with the 5th, 6,7,8,9 pins of stepping motor driver module TA8435 respectively; K9, the P9 of main control module core board S3C2440, U13, L9 pin link to each other with the 13rd, 14,15,16 pins of ZigBee module CC2430 respectively, and the data processing module in the ZigBee node communication module CC2430 links to each other with radio-frequency module; Energy value is sent to S3C2440 by ADE7169 through serial ports, and S3C2440 is sent to ZigBee telegon with all duty parameters through the CC2430 radio-frequency module by SPI.
As shown in Figure 5, after linking to each other, the pin 20,7,47 of the CC2430 integrated chip of ZigBee inside modules function realizing circuit, 41 links to each other the other end ground connection of capacitor C 411 and capacitor C 71 with an end of digital circuit power source DVDD_3.3V, capacitor C 411, capacitor C 71; Pin 42 links to each other with an end of capacitor C 421, the other end ground connection of capacitor C 421; The end of one end of pin 10 and capacitor C 678, resistance R 406, button S1 links to each other, the other end ground connection of capacitor C 678 and button S1, and the other end of resistance R 406 links to each other with digital circuit power source DVDD_3.3V; Pin 23 links to each other with an end of digital circuit power source DVDD_3.3V and capacitor C 231, the other end ground connection of capacitor C 231; Pin 24 links to each other with an end of analog circuit power supply VCC1.8 and capacitor C 241, the other end ground connection of capacitor C 241; Pin 26 links to each other with an end of resistance R 261, the other end ground connection of resistance R 261; Pin 22 links to each other with an end of resistance R 221, the other end ground connection of resistance R 221; Pin 19 links to each other with an end of crystal oscillator X1 and capacitor C 191, and the other end of crystal oscillator X1 links to each other with an end of pin 21 and capacitor C 211, the equal ground connection of the other end of capacitor C 191 and capacitor C 211; Pin 44 links to each other with an end of crystal oscillator Y5 and capacitor C 441, and the other end of crystal oscillator Y5 links to each other with an end of pin 43 and capacitor C 431, the equal ground connection of the other end of capacitor C 441 and capacitor C 431; Pin 33 links to each other with inductance L 1 one ends, inductance L 1 other end, pin 32, pin 34 link to each other with inductance L 3 one ends respectively, and pin 32 links to each other with inductance L 2 one ends, and pin 34 links to each other with inductance L 2 other ends, inductance L 3 other ends link to each other with capacitor C 63 1 ends, and capacitor C 63 other ends link to each other with antenna ANT1; Pin 25,27,28,29,30,31,35,36,37,38,39,40 links to each other the other end ground connection of capacitor C 11, capacitor C 101, capacitor C 371 with an end of analog circuit power supply VCC1.8, capacitor C 11, capacitor C 101, capacitor C 371.
As shown in Figure 6, the solar azimuth tracking of desert regions grid photovoltaic power generation comprises the steps:
1) remote monitoring center is set fine, cloudy, the rain mode of operation of the solar azimuth tracking means of desert regions grid photovoltaic power generation, and the thickness tracking accuracy under the fine mode of operation, and be sent to the ZigBee wireless network by the ZigBee/TD-SCDMA gateway of Internet, GGSN gateway, TD-SCDMA3G public network, photovoltaic generation main system; The ZigBee telegon that doubles as the ZigBee/TD-SCDMA gateway is transmitted tracking mode of operation and the tracking accuracy that remote monitoring center is set, tracking mode of operation and tracking accuracy operation that photovoltaic generation main system and photovoltaic generation subsystem are set according to remote monitoring center, the ZigBee telegon is comprised of photovoltaic generation main system main control module S3C2440 and ZigBee telegon communication module CC2430;
2) the solar azimuth tracking means of desert regions grid photovoltaic power generation stops to follow the tracks of under the rainy day mode of operation, photovoltaic array goes to sun altitude and the azimuth of setting, wherein solar azimuth adopts solar azimuth the previous day, and sun altitude adopts following computing formula:
H＝90°-|μ+/-β|
In the formula, μ is local geographic latitude;
β is the subsolar point geographic latitude;
3) the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts astronomical the tracking under the cloudy mode of operation, the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts the tracking of astronomical tracking and photovoltaic generating system energy output under the fine mode of operation, determine sun altitude and the azimuth of photovoltaic array, initial, the termination time of tracking are set by remote monitoring center; The controller of photovoltaic generation main system and photovoltaic generation subsystem is through stepping motor driver module TA8435, output elevation angle and the required electric impulse signal of stepping motor angular displacement corresponding to azimuth;
Wherein adopt astronomical the tracking: according to the relative motion law of the earth and the sun, determine sun altitude and the azimuth of photovoltaic array, the stepping motor tracking accuracy is selected default step angle, and the computing formula of astronomical tracking horizontal coordinate is as follows:
In the formula, α--sun altitude
δ--declination angle, every monthly variation 8 degree
ω--hour angle per hour changes 15 degree
Consider solar azimuth tracking energy consumption, drive unit life-span, and tracking accuracy and generating the relationship between quantities composite factor, astronomical tracking cycle was got 1 hour;
Adopt the photovoltaic generating system energy output to follow the tracks of: remote monitoring center is set the tracking initiation time T of tracking means
s, termination time T
sSlightly, carefully follow the tracks of period T
d, T
m, and corresponding variable step tracking accuracy value: t ∈ T
dThe thick tracking period selected 1/2 segmentation step angle, and tracking cycle is 1800 seconds; T ∈ T
mThe thin tracking period selected 1/4 segmentation step angle, and thin tracking cycle is 900 seconds;
The electric energy metering module ADE7169 of photovoltaic generation subsystem gathers voltage, the current signal of photovoltaic array, and the generating value of output is kept in the memory of controller; The sampling period of electric energy metering module ADE7169 is 1 second, and the mean value of 3 energy output was defined as " electric weight average " in the middle of every continuous sampling 5 times, rejecting maximin were got, and " electric weight average " also is kept in the memory of controller;
T ∈ T
dFollow the tracks of the period for thick, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/2 segmentation step angle every the controller of 1800 seconds, photovoltaic generation main system and photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain the electric weight average time, every one step of tracking, at first compare with the electric weight average of reposition and the maximum electric weight average in front 1800 seconds, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion, electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if greater than the electric weight average of a upper position sampling, then rotate 1/2 step angle, and if continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates;
T ∈ T
mFollow the tracks of the period for thin, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/4 segmentation step angle every the controller of 900 seconds, photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain " electric weight average " time sum, every one step of tracking, at first compare with the electric weight average of reposition and the maximum electric weight average in front 900 seconds, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion; Behind selected sun altitude and the azimuth, according to " electric weight average " maximal criterion, controller is done further to follow the tracks of with 1/4 segmentation step angle through stepping motor driver module TA8435; Electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if the electric weight average greater than a upper position sampling, then rotate 1/4 step angle, if and continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates.
Claims (2)
1. desert regions grid photovoltaic power generation with the solar azimuth tracking means is characterized in that comprising ZigBee wireless network three parts of remote monitoring center, TD-SCDMA 3G public network and subrange; The ZigBee wireless network is comprised of the ZigBee node of one or more photovoltaic generation subsystems and the ZigBee telegon of photovoltaic generation main system, the ZigBee telegon of photovoltaic generation main system comprises controller main control module S3C2440, electric energy metering module ADE7169, stepping motor driver module TA8435, TD-SCDMA wireless module TDM330, ZigBee telegon communication module CC2430 and wireless USB module CYWUSB6935, the ZigBee node of photovoltaic generation subsystem comprises main control module S3C2440, ZigBee node communication module CC2430 and electric energy metering module ADE7169, each photovoltaic generating system subsystem is by the ZigBee wireless network exchange message of subrange; Remote monitoring center links to each other with TD-SCDMA 3G public network by the GGSN gateway of Internet, operator, and the GGSN gateway carries out protocol conversion to Internet, TD-SCDMA 3G public network packet; TD-SCDMA 3G public network is through the ZigBee/TD-SCDMA of photovoltaic generation main system gateway accessing ZigBee wireless network, and the ZigBee telegon of photovoltaic generation main system doubles as the ZigBee/TD-SCDMA gateway; The internal module annexation of photovoltaic generation main system is: photovoltaic array successively with the converter that is incorporated into the power networks, electrical network links to each other, photovoltaic array successively with stepping motor, stepping motor driver module TA8435 links to each other, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, main control module S3C2440 respectively with stepping motor driver module TA8435, converter is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee telegon communication module CC2430, wireless USB module CYWUSB6935, TD-SCDMA wireless module TDM330 links to each other, and through TD-SCDMA wireless module TDM330 access TD-SCDMA 3G public network; The internal module annexation of photovoltaic generation subsystem is: photovoltaic array links to each other with the converter that is incorporated into the power networks, electrical network successively, photovoltaic array links to each other with stepping motor, stepping motor driver module TA8435 successively, the converter that is incorporated into the power networks links to each other with electric energy metering module ADE7169, and main control module S3C2440 links to each other with stepping motor driver module TA8435, the converter that is incorporated into the power networks, electric energy metering module ADE7169, electrical network, ZigBee node communication module CC2430 respectively.
2. one kind is used the as claimed in claim 1 solar azimuth tracking of the desert regions grid photovoltaic power generation of system, it is characterized in that comprising the steps:
1) remote monitoring center is set fine, cloudy, the rain mode of operation of the solar azimuth tracking means of desert regions grid photovoltaic power generation, and the thickness tracking accuracy under the fine mode of operation, and be sent to the ZigBee wireless network by the ZigBee/TD-SCDMA gateway of Internet, GGSN gateway, TD-SCDMA3G public network, photovoltaic generation main system; The ZigBee telegon that doubles as the ZigBee/TD-SCDMA gateway is transmitted tracking mode of operation and the tracking accuracy that remote monitoring center is set, tracking mode of operation and tracking accuracy operation that photovoltaic generation main system and photovoltaic generation subsystem are set according to remote monitoring center, the ZigBee telegon is comprised of photovoltaic generation main system main control module S3C2440 and ZigBee telegon communication module CC2430;
2) the solar azimuth tracking means of desert regions grid photovoltaic power generation stops to follow the tracks of under the rainy day mode of operation, photovoltaic array goes to sun altitude and the azimuth of setting, wherein solar azimuth adopts solar azimuth the previous day, and sun altitude adopts following computing formula:
H＝90°-|μ+/-β|
In the formula, μ is local geographic latitude;
β is the subsolar point geographic latitude;
3) the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts astronomical the tracking under the cloudy mode of operation, the solar azimuth tracking means of desert regions grid photovoltaic power generation adopts the tracking of astronomical tracking and photovoltaic generating system energy output under the fine mode of operation, determine sun altitude and the azimuth of photovoltaic array, initial, the termination time of tracking are set by remote monitoring center; The controller of photovoltaic generation main system and photovoltaic generation subsystem is through stepping motor driver module TA8435, output elevation angle and the required electric impulse signal of stepping motor angular displacement corresponding to azimuth;
Wherein adopt astronomical the tracking: according to the relative motion law of the earth and the sun, determine sun altitude and the azimuth of photovoltaic array, the stepping motor tracking accuracy is selected default step angle, and the computing formula of astronomical tracking horizontal coordinate is as follows:
In the formula, α--sun altitude
δ--declination angle, every monthly variation 8 degree
ω--hour angle per hour changes 15 degree
Consider solar azimuth tracking energy consumption, drive unit life-span, and tracking accuracy and generating the relationship between quantities composite factor, astronomical tracking cycle was got 1 hour;
Adopt the photovoltaic generating system energy output to follow the tracks of: remote monitoring center is set the tracking initiation time T of tracking means
s, termination time T
eSlightly, carefully follow the tracks of period T
d, T
m, and corresponding variable step tracking accuracy value: t ∈ T
dThe thick tracking period selected 1/2 segmentation step angle, and tracking cycle is 30 minutes; T ∈ T
mThe thin tracking period selected 1/4 segmentation step angle, and thin tracking cycle is 15 minutes;
The electric energy metering module ADE7169 of photovoltaic generation subsystem gathers voltage, the current signal of photovoltaic array, and the generating value of output is kept in the memory of controller; The sampling period of electric energy metering module ADE7169 is 1 second, and the mean value of 3 energy output was defined as " electric weight average " in the middle of every continuous sampling 5 times, rejecting maximin were got, and " electric weight average " also is kept in the memory of controller; T ∈ T
dBe thick and follow the tracks of the period, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/2 segmentation step angle every the controller of 30 minutes, photovoltaic generation main system and photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain the electric weight average time, every one step of tracking, at first compare with the electric weight average of reposition and front 30 minutes maximum electric weight average, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion, electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if greater than the electric weight average of a upper position sampling, then rotate 1/2 step angle, and if continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates;
T ∈ T
mBe thin and follow the tracks of the period, follow the tracks of solar azimuth through stepping motor driver module TA8435 with 1/4 segmentation step angle every 15 minutes, the controller of photovoltaic generation subsystem, follow the tracks of criterion, i.e. " electric weight average " maximum; The time interval between stepping motor driver module TA8435 output order is 30 seconds, be used for machine driving time, reposition photovoltaic array reaction time and reposition and obtain " electric weight average " time sum, every one step of tracking, at first compare with the electric weight average of reposition and front 15 minutes maximum electric weight average, if less than 70% of maximum electric weight average, cloud noise then occurs, abandon the photovoltaic generating system energy output and follow the tracks of, conversion is astronomical follows the tracks of; Otherwise, follow the tracks of sun altitude and azimuth according to electric weight average maximal criterion; Behind selected sun altitude and the azimuth, according to " electric weight average " maximal criterion, controller is done further to follow the tracks of with 1/4 segmentation step angle through stepping motor driver module TA8435; Electric weight average maximal criterion is that photovoltaic array is followed the tracks of when rotating, the electric weight average of reposition sampling and the electric weight average of a upper position sampling are compared, if the electric weight average greater than a upper position sampling, then rotate 1/4 step angle, if and continue sampling reposition electric weight average less than the electric weight average of a upper position sampling, then transfer back to a position, this time the tracking cycle photovoltaic array no longer rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010265388XA CN101938142B (en) | 2010-08-24 | 2010-08-24 | Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010265388XA CN101938142B (en) | 2010-08-24 | 2010-08-24 | Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101938142A CN101938142A (en) | 2011-01-05 |
| CN101938142B true CN101938142B (en) | 2013-03-27 |
Family
ID=43391326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010265388XA Expired - Fee Related CN101938142B (en) | 2010-08-24 | 2010-08-24 | Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101938142B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148864B (en) * | 2011-01-28 | 2014-08-13 | 西安建筑科技大学 | Photovoltaic generation and large public building integration wireless monitoring system |
| CN102280937B (en) * | 2011-07-29 | 2017-08-04 | 深圳市科陆电子科技股份有限公司 | A kind of monitoring system and method for distributed energy |
| CN103197613B (en) * | 2012-01-09 | 2016-03-30 | 中国科学院沈阳自动化研究所 | A kind of photovoltaic power station monitoring system based on industry wireless network |
| CN102541089B (en) * | 2012-01-12 | 2013-10-02 | 冶金自动化研究设计院 | Photovoltaic single-axis tracking system based on industrial wireless network and control method |
| CN102566600B (en) * | 2012-02-13 | 2015-08-26 | 无锡泰克塞斯新能源科技有限公司 | The automatic correction system of motion tracking solar photovoltaic generating system and its implementation |
| CN103809535A (en) * | 2012-11-09 | 2014-05-21 | 江苏绿扬电子仪器集团有限公司 | Photovoltaic array monitoring device based on ZigBee technology |
| CN103222410B (en) * | 2013-05-07 | 2014-05-21 | 甘肃省电力设计院 | Comprehensive utilization method and facility of new energy power distribution and output system and desertification control |
| CN110233788B (en) * | 2013-11-12 | 2021-06-18 | 艾思玛太阳能技术股份公司 | Method for communicating a system control unit with a plurality of power generation devices |
| CN103600846B (en) * | 2013-12-04 | 2016-07-13 | 新誉集团有限公司 | Solar powered aircraft maximal power tracing cell array mechanism and tracking |
| CN105242692A (en) * | 2015-10-26 | 2016-01-13 | 苏州华安普电力科技股份有限公司 | Distributed roof photovoltaic generating intelligent monitoring device |
| CN106936155A (en) * | 2015-12-30 | 2017-07-07 | 中国科学院西安光学精密机械研究所 | Solar photovoltaic power generation intelligent control system |
| CN107045282A (en) * | 2017-02-22 | 2017-08-15 | 天长市天尚清洁能源有限公司 | Solar automatic tracking system and method based on single chip microcomputer fuzzy control algorithm |
| CN109724272A (en) * | 2019-02-18 | 2019-05-07 | 南昌航空大学 | The automatic solar energy tracking device of the sun is accurately tracked under a kind of any weather condition |
| CN111399548A (en) * | 2020-03-27 | 2020-07-10 | 上海电力大学 | Control method of tracking type photovoltaic power generation system capable of identifying weather types |
| CN115208303A (en) * | 2022-09-14 | 2022-10-18 | 山西超维科技有限公司 | Photovoltaic power generation system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0888978A (en) * | 1994-09-14 | 1996-04-02 | Nissin Electric Co Ltd | Method of detecting single operation of distributed power supply system |
| CN1304796C (en) * | 2003-04-15 | 2007-03-14 | 张耀明 | Large type wind proof light collecting device with capability of automatic tracking sun |
| CN1928460B (en) * | 2006-09-28 | 2010-06-02 | 宁波新亚机电有限公司 | Solar automatic tracking circuit |
| TWI409606B (en) * | 2007-12-26 | 2013-09-21 | Hon Hai Prec Ind Co Ltd | Solar energy control system |
| TWI397343B (en) * | 2008-11-21 | 2013-05-21 | Ind Tech Res Inst | Solar-powered wireless communication module with sunshine intensity measurement ability |
| CN101662241B (en) * | 2009-09-18 | 2011-10-05 | 杭州电子科技大学 | Sun orientation automatic tracking method and device used for photovoltaic power generation |
| CN101674032A (en) * | 2009-10-19 | 2010-03-17 | 浙江大学 | Automatic tracking type photovoltaic power station monitoring system based on wireless network |
| CN101777856B (en) * | 2010-01-12 | 2015-04-22 | 盖剑刚 | Photovoltaic tracking device using photosensitive difference and network-based monitoring method |
| CN201774274U (en) * | 2010-08-24 | 2011-03-23 | 浙江大学 | Desert regions grid photovoltaic power generation system with sun azimuth tracker |
-
2010
- 2010-08-24 CN CN201010265388XA patent/CN101938142B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101938142A (en) | 2011-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101938142B (en) | Desert synchronization photovoltaic power generating system with solar azimuth tracking device and tracking method thereof | |
| CN204928748U (en) | A monitor control system for photovoltaic power plant | |
| CN102638195B (en) | Solar energy generating system control method | |
| CN201497914U (en) | Synchronous tracking control system for solar energy-supply station | |
| CN201774274U (en) | Desert regions grid photovoltaic power generation system with sun azimuth tracker | |
| CN108681341A (en) | A kind of solar tracking system and its method based on closed loop multimode | |
| CN102339066B (en) | Adaptive solar energy tracking method facing wireless sensor network | |
| CN201886356U (en) | Automatic solar follow-up mechanism based on singlechip | |
| CN111833212B (en) | Operation and maintenance management system and method for solar photovoltaic power station | |
| CN105955319A (en) | Solar tracker control system based on inverter output power | |
| CN102156408B (en) | System and method for tracking and controlling maximum power point in dynamically self-adaptive evolvement process | |
| CN106681366A (en) | Optical signal automatic tracking device | |
| CN112838808A (en) | Intelligent photovoltaic power generation device and control method thereof | |
| CN104536470A (en) | Coordinated tracking control system for large-scale photovoltaic panel group | |
| CN209458060U (en) | A kind of marine wind energy solar energy and wave energy combined generating device | |
| CN203102022U (en) | Novel solar automatic tracking system | |
| CN103135600A (en) | Control system of heliostat | |
| CN205792418U (en) | A kind of from formula photovoltaic module day by day | |
| CN214174922U (en) | Intelligent solar light automatic tracking light system | |
| CN108536178A (en) | Wisdom solar cell electric power station system | |
| CN105974947A (en) | IoT-based intelligent solar power generation system | |
| CN103135597A (en) | Multi-group photovoltaic power generation tracking control system for solar power generation | |
| CN106681364A (en) | Tracking system for monitoring power station | |
| CN205844913U (en) | A kind of sun tracker control system based on inverter output power | |
| CN202394121U (en) | Heliostat control system for photo-thermal power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20140824 |
|
| EXPY | Termination of patent right or utility model |