CN106410957A - Tracking control method and system for photovoltaic power station - Google Patents
Tracking control method and system for photovoltaic power station Download PDFInfo
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- CN106410957A CN106410957A CN201610992456.XA CN201610992456A CN106410957A CN 106410957 A CN106410957 A CN 106410957A CN 201610992456 A CN201610992456 A CN 201610992456A CN 106410957 A CN106410957 A CN 106410957A
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- Prior art keywords
- photovoltaic
- tracking controller
- inverter
- photovoltaic tracking
- supply line
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a tracking control method and system for a photovoltaic power station. The photovoltaic power station comprises an array photovoltaic module for converting the luminous energy into a direct current for outputting and an inverter for converting the direct current into an alternating current and generating power in a grid-connected mode with a public supply system. The method includes: a current power supply environment state of a public supply system is detected; when the power supply environment of the public supply system is normal, switching to a first power supply line with an input terminal connected in parallel to an output terminal of the inverter and a connecting terminal of the public supply system is realized to provide power for a photovoltaic tracking controller; when the power supply environment of the public supply system is abnormal, switching to a second power supply line with an input terminal connected in parallel to an input terminal of the inverter and a connecting terminal of the array photovoltaic module is realized to provide power for the photovoltaic tracking controller; and one of the first power supply line and the second power supply line provides power, so that the photovoltaic tracking controller controls the direction and angle of the array photovoltaic assembly. Therefore, field cable laying is reduced substantially; and the tracking system becomes flexible and stable when facing a changeful station environment and thus the communication quality becomes reliable.
Description
Technical field
The present invention relates to photovoltaic plant control field, more particularly to a kind of tracking and controlling method of photovoltaic plant and be
System.
Background technology
It is known that inverter multiple tracker systems, existing powering mode in photovoltaic plant joint connection in site, often cover
Tracker control cabinet needs the very long cable electrical network power taking in photovoltaic electric yard of laying, increases the workload of site operation, makes
The cost of work increases and cable is easy to go wrong in severe power station environment, makes the photovoltaic tracking controller can not normal work
Make it is impossible to accomplish the monitor in real time to data message.
Photovoltaic tracking controller is mainly the data message detecting Solar variability, and transfers information to central controller,
Control the working condition of the array photovoltaic module in solar photovoltaic system with this；Existing communication architecture is communication box with cable modem
Letter mode connects multiple control cabinets, and communication box is connected with wired communication mode with data acquisition unit together with inverter afterwards.This
Control cabinet in scheme, communication box and data acquisition unit distant, communication signal loss is very big, and communication quality is very unstable
Fixed.So often result in communication box bad with the communication quality of control cabinet, add the barbarous construction at scene, during cable is very easy to
Disconnected, the pressure so bringing data acquisition unit is larger, and communication box is relatively costly.
Additionally, multiple control cabinets are interconnected with communication box, the signal reflex of control cabinet is more serious, and this signal reflex also will be disturbed
Normal communication between multiple control cabinets and communication box, if solve this problem, it usually needs at control cabinet end or communication box end
Increase source build-out resistor solving, so undoubtedly increased the design difficulty of whole control cabinet or communication box so that on cost
Rise；If multiple control cabinets one of them break down, its by bus pass to communication box signal be 0, so will make
Control cabinet cannot work to the whole communication bus short circuit of communication box.
Content of the invention
The present invention provides a kind of tracking and controlling method of photovoltaic plant and system, and its purpose has ensured photovoltaic tracking control
Device processed is constantly in working condition, by increased the scheme from array photovoltaic group power taking, greatly reduces the paving of on-site cable
If so that tracking system is more flexibly reliable in the face of changeable power station environment, communication quality is relatively reliable.
The technical scheme that the present invention provides is as follows：
A kind of tracking and controlling method of photovoltaic plant, described photovoltaic plant includes converting light energy into the battle array of direct current electricity output
Row photovoltaic module, direct current is converted to the inverter generating electricity by way of merging two or more grid systems after alternating current with public electric wire net, including：Step S10 detects
The current power supply ambient condition of public electric wire net；Step S20, when the power supply environment of public electric wire net is normal, switches to input in parallel
Power for photovoltaic tracking controller with the first supply line of the connection end of public electric wire net in the output end of described inverter；Step
S30, when the power supply environmental abnormality of public electric wire net, switches to input and is connected in parallel on the input of described inverter and described array
Second supply line of the connection end of photovoltaic module powers for described photovoltaic tracking controller；Step S40 is powered by described first
One of circuit or described second supply line are powered, and make described photovoltaic tracking controller control the side of described array photovoltaic module
To, angle.
In the present invention, there is provided multiple power supply modes, ensured that photovoltaic tracking controller is constantly in working condition, led to
Cross the scheme that increased from array photovoltaic group power taking, greatly reduce the laying of on-site cable so that tracking system is in the face of changeable
Power station environment more flexibly reliable, communication quality is relatively reliable, monitoring power station has been accomplished not because internal field power unstable
Uninterrupted, and cost reduces substantially.
Preferably, described first supply line includes：Step S21 is by the company of the output end of described inverter and public electric wire net
Connect end alternating current carry out rectification process after, formed direct current supply described photovoltaic tracking controller normal work.
Preferably, described second supply line includes：The direct current that described array photovoltaic module exports is carried out by step S31
After pressure regulation is processed, for described photovoltaic tracking controller normal work.
In the present invention, from the AC port power taking of inverter, compare with respect to from the power taking of national grid end, with tracker control
The distance of case processed is shorter, saves substantial amounts of cable；Multiple power supply modes make tracker control cabinet just can normal work, adjust in time
Whole tracking support is to optimum state, it is to avoid bad weather causes to cell panel to damage, thus avoiding economic loss.
A kind of tracking control system of photovoltaic plant, described photovoltaic plant includes converting light energy into the battle array of direct current electricity output
Row photovoltaic module, then direct current is converted to generates electricity by way of merging two or more grid systems with public electric wire net after alternating current, described tracking control system includes：Inverse
Become device, the first supply line, the second supply line, power supply switching submodule and photovoltaic tracking controller；Wherein, described inverse
The input of change device is electrically connected with described array photovoltaic module, output end is electrically connected with public electric wire net, will be from described array light
After the direct current of volt assembly is converted to alternating current, generate electricity by way of merging two or more grid systems with public electric wire net；Described first supply line, input is connected in parallel on
The output end of described inverter and the connection end of public electric wire net, output end is electrically connected with described photovoltaic tracking controller；Described
Two supply lines, input is connected in parallel on the input of described inverter and the connection end of described array photovoltaic module, output end with
Described photovoltaic tracking controller electrical connection；Described power supply switching submodule, the current power supply ambient condition of detection public electric wire net, and
Normal/abnormal according to the power supply environment of public electric wire net, described first supply line/the second supply line of corresponding switching is to described light
Volt tracking control unit is powered；Described photovoltaic tracking controller, respectively with described first supply line, described second supply line's electricity
Connect, powered by one of described first supply line/the second supply line, control direction, the angle of described array photovoltaic module.
In the present invention, there is provided multiple power supply modes, ensured that photovoltaic tracking controller is constantly in working condition, led to
Cross and increased from array photovoltaic group power taking, greatly reduce the laying of on-site cable so that tracking system is in the face of changeable power station
Environment is more flexibly reliable, and communication quality is relatively reliable, monitoring power station has been accomplished not because internal field power unstable not between
Disconnected, and cost reduction is substantially.
Preferably, also include controller supply module, described controller supply module includes：AC-DC power supply unit, input
End is connected in parallel on the output end of described inverter and the connection end of public electric wire net, and output end is electrically connected with described photovoltaic tracking controller
Connect, the alternating current of the output end of described inverter and the connection end of public electric wire net is carried out after rectification process, form direct current and supply
Described photovoltaic tracking controller normal work.
Preferably, described controller supply module also includes：DC-DC power supply unit, input is connected in parallel on described inverter
Input and described array photovoltaic module connection end, output end is electrically connected with described photovoltaic tracking controller, by described battle array
After the direct current of row photovoltaic module output carries out pressure regulation process, for described photovoltaic tracking controller normal work.
Preferably, described controller supply module is made up of described AC-DC power supply unit and described DC-DC power supply unit
Dual input intelligent switch power source.
Preferably, including described power supply switching submodule is two-way interlock switch, and described two-way interlock switch is arranged on institute
State in dual input intelligent switch power source.
In the present invention, from the AC port power taking of inverter, compare with respect to from the power taking of national grid end, with tracker control
The distance of case processed is shorter, saves substantial amounts of cable；Multiple power supply modes make tracker control cabinet just can normal work, adjust in time
Whole tracking support is to optimum state, it is to avoid bad weather causes to cell panel to damage, thus avoiding economic loss.
Preferably, also include：Data acquisition unit, central controller；Wherein, described inverter, with described photovoltaic tracking control
Device communication processed connects；Described data acquisition unit, is connected with the communication of described inverter；Described central controller, is adopted with described data
Storage communication connects；Wherein, described photovoltaic tracking controller, sends the data message of photovoltaic tracking, and will be from described central authorities
The server time of controller was corrected with the photovoltaic tracking controller time；Described inverter, receives, to described data acquisition
Device forwards the data message from described photovoltaic tracking controller, and receives, forwards from institute to described photovoltaic tracking controller
State the server time of central controller；Described data acquisition unit, the described photovoltaic tracking that the described inverter of collection forwards controls
Device data message, and receive, forward the server time from described central controller to described inverter；Described central authorities control
Device, the data message of monitoring described data acquisition unit collection, and send server time to described data acquisition unit, control described
Photovoltaic tracking controller normally runs.
Preferably, the mode that described data acquisition unit is connected with the communication of described inverter includes：By wired communication side
Formula, and/or power carrier communication mode.
In the present invention, a control cabinet, to an inverter, saves communication box and some cables, simplifies communications rack
Structure is so that communication quality is more reliable more stable；Inverter is between the signal transmission of photovoltaic tracking controller data collector
One transmission channel is only provided, does not do any data conversion so as to save the stringing work of communication line so as to cost-effective,
Save the waste of the energy.
Compared with prior art, the present invention provides a kind of tracking and controlling method of photovoltaic plant and system, at least bring with
A kind of lower technique effect:
In the present invention, using integrated solution, greatly reduce the laying of on-site cable so that faced by tracking system
Changeable power station environment is more flexibly reliable, and communication quality is relatively reliable, monitoring power station has been accomplished not because internal field powers not
Stable is uninterrupted, and cost reduces substantially.
In the present invention, inverter multiple tracker systems in photovoltaic plant joint connection in site, and inverter and electrical network and
Array photovoltaic module has interface, therefore accomplishes to be used the electric energy of assembly as backup battery, forms redundancy protection systems.Normally
In the case of, inverter, from the electrical network power taking of box type transformer, once electrical network is abnormal, is then switched at once uses battery assembly power supply,
Enable motor to set level assembly in time, be not easily susceptible to boisterous infringement.When power system restoration is normal, again can and
When switchback go so that system is from motion tracking, continue to generate electricity.
Brief description
Below by the way of clearly understandable, preferred embodiment is described with reference to the drawings, to a kind of tracking of photovoltaic plant
Control method and system performance, technical characteristic, advantage and its implementation are further described.
Fig. 1 is a kind of flow chart of one embodiment of tracking and controlling method of photovoltaic plant of the present invention；
Fig. 2 is a kind of flow chart of another embodiment of tracking and controlling method of photovoltaic plant of the present invention；
Fig. 3 is a kind of structure chart of an embodiment of the tracking control system of photovoltaic plant of the present invention；
Fig. 4 is a kind of structure chart of another embodiment of the tracking control system of photovoltaic plant of the present invention；
Fig. 5 is a kind of structure chart of another embodiment of the tracking control system of photovoltaic plant of the present invention；
Fig. 6 is a kind of circuit diagram of the tracing control supply line embodiment of photovoltaic plant of the present invention.
Specific embodiment
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, brief description will be compareed below
The specific embodiment of the present invention.It should be evident that drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing, and obtain other embodiments.
For making simplified form, each in figure only schematically show part related to the present invention, and they do not represent
It is as the practical structures of product.In addition, so that simplified form readily appreciates, there is identical structure or function in some in figures
Part, only symbolically depicts one of, or has only marked one of.Herein, " one " not only represents
" only this " is it is also possible to represent the situation of " more than one ".
The present invention provides an a kind of embodiment of tracking and controlling method of photovoltaic plant, and described photovoltaic plant is included light
The array photovoltaic module of direct current electricity output can be converted to, direct current is converted to generate electricity by way of merging two or more grid systems with public electric wire net after alternating current inverse
Become device, including：Step S10 detects the current power supply ambient condition of public electric wire net；Step S20 is just working as the power supply environment of public electric wire net
Chang Shi, switching to input and being connected in parallel on the output end of described inverter with the first supply line of the connection end of public electric wire net is light
Volt tracking control unit is powered；Step S30, when the power supply environmental abnormality of public electric wire net, switches to input and is connected in parallel on described inversion
Second supply line of the input of device and the connection end of described array photovoltaic module powers for described photovoltaic tracking controller；Step
Rapid S40 is powered by one of described first supply line or described second supply line, makes described photovoltaic tracking controller control institute
State direction, the angle of array photovoltaic module.
Specifically, in the present embodiment, with reference to shown in Fig. 1, in photovoltaic generating system, electric energy comes from array photovoltaic group
Part namely solar panel, because the electric energy that array photovoltaic module produces is direct current, provide electric energy for electrical network, thus necessary
Will through inverter direct current is become alternating current carry out grid-connected to network system in；In order to increase the work work of solar panel
Make efficiency, the change informations such as the direction that the sun rotates will be detected the moment, change information is rotated to adjust solar cell according to the sun
The direction of plate, then now need to obtain the sun rotation change information (inclusion angle, the phase such as direction by photovoltaic tracking controller
Related parameter information)；In the tracking and controlling method of the photovoltaic plant of the present invention, first-selection will detect that the environment of current power supply grid becomes
Change information, if weather is normal, when being in state on daytime, photovoltaic tracking controller power taking process is：Array photovoltaic module produces
Direct current, direct current is sent and is converted to alternating current to inverter, and during alternating current is connected to the grid, photovoltaic tracking controller is from electricity
Power taking in net, now for the first supply line；Also include, weather is normal, is in state on daytime, and now electrical network occur extremely,
So, photovoltaic tracking controller power taking from array photovoltaic module, now for the second supply line；If when night, photovoltaic
Directly from electrical network power taking, the electricity of electrical network comes from national grid to tracking control unit, makes photovoltaic tracking controller be constantly in work
State.When supply line is switched to the second supply line from the first supply line, the second supply line has 30S～60S's
Time delay connect so that the second supply line can powered hot plug it is ensured that security.
In the present invention, there is provided multiple power supply modes, ensured that photovoltaic tracking controller is constantly in working condition, led to
Cross the technical scheme that increased from array photovoltaic group power taking, greatly reduce the laying of on-site cable so that faced by tracking system
Changeable power station environment is more flexibly reliable, and communication quality is relatively reliable；The present invention has accomplished not because interior for the monitoring in power station
Power supply unstable and the working condition that affects photovoltaic tracking controller, improve the endurance of photovoltaic tracking controller,
And significantly reduce construction cost.
Preferably, described first supply line includes：Step S21 is by the company of the output end of described inverter and public electric wire net
Connect end alternating current carry out rectification process after, formed direct current supply described photovoltaic tracking controller normal work.
Preferably, described second supply line includes：The direct current that described array photovoltaic module exports is carried out by step S31
After pressure regulation is processed, for described photovoltaic tracking controller normal work.
Specifically, the present embodiment is the another embodiment providing on the basis of a upper embodiment, referring to figs. 2 and 6 institute
Show；When electrical network is normal, privileged way works, i.e. the first supply line, simultaneously inversion unit and photovoltaic DC-to-AC converter also normal simultaneously
Net generates electricity.Now, DC switch closure, (interlock judges from the signal switching 2,220V alternating current to switch 1, switch 2 closure
Pressure is judged to be switched 2 closures), switch 3 disconnection, Switching Power Supply is dual input intelligent switch power source, and from inverter
Exchange end is the power taking of AC port, powers to the control cabinet of photovoltaic tracking device, photovoltaic tracking device normal work；Work as electrical grid failure
Or when electrical network disconnects, privileged way is that the first supply line can not power to tracker control cabinet again, enables alternate channel work
Making is the second supply line, now, DC switch closure, interlock judges the signal from switch 2, undertension 220V, sentences
Break signal is 0, switch 2 disconnection, switch 3 closure, and array cell panel is that PV end powers to Switching Power Supply.On above two lines road
During power supply, through dual input intelligent switch power source, and 3 and 2 groups of switch to be switched before the control cabinet power taking of photovoltaic tracking device
The Hu locking device switch becoming is arranged in dual input intelligent switch power source, by detecting whether electrical network occurs exception；Due to first
The electricity of bar circuit is alternating current, and the electricity of Article 2 circuit is direct current, so carried out whole by dual input intelligent switch power source
For the control cabinet of photovoltaic tracking device after stream, and pressure regulation process, because the control cabinet of photovoltaic tracking device is by 24V direct current supply.
In the present invention, from the AC port power taking of inverter, compare with respect to from the power taking of national grid end, with tracker control
The distance of case processed is shorter, saves substantial amounts of cable；Multiple power supply modes make tracker control cabinet just can normal work, adjust in time
Whole tracking support is to optimum state, it is to avoid bad weather causes to cell panel to damage, thus avoiding economic loss.
The present invention also provides an a kind of embodiment of tracking control system of photovoltaic plant, described photovoltaic plant include by
Luminous energy is converted to the array photovoltaic module 10 of direct current electricity output, then direct current is converted to grid-connected with public electric wire net 30 after alternating current
Generate electricity, described tracking control system includes：Inverter 20, the first supply line 41, the second supply line 42, power supply switching submodule
Block 51 and photovoltaic tracking controller 60；Wherein, the input of described inverter 20 and described array photovoltaic module 10 are electrically connected
Connect, output end is electrically connected with public electric wire net 30, the direct current from described array photovoltaic module 10 is converted to after alternating current, with
Public electric wire net 30 generates electricity by way of merging two or more grid systems；Described first supply line 41, input be connected in parallel on the output end of described inverter 20 with public
The connection end of electrical network 30, output end is electrically connected with described photovoltaic tracking controller 60；Described second supply line 42, input is simultaneously
It is associated in the input of described inverter 20 and the connection end of described array photovoltaic module 10, output end is controlled with described photovoltaic tracking
Device 60 electrically connects；Described power supply switching submodule 51, the current power supply ambient condition of detection public electric wire net 30, and according to common electrical
The power supply environment of net 30 is normal/abnormal, corresponding switch supply line 42 of described first supply line 41/ second to described photovoltaic with
Track controller is powered；Described photovoltaic tracking controller, respectively with described first supply line 41, described second supply line 42 electricity
Connect, powered by one of supply line 42 of described first supply line 41/ second, the direction of the described array photovoltaic module of control,
Angle.
Specifically, in the present embodiment, with reference to shown in Fig. 3,4,5, in photovoltaic generating system, electric energy comes from array light
Volt assembly namely solar panel, because the electric energy that array photovoltaic module produces is direct current, provide electric energy for electrical network, so
Have to through inverter direct current is become alternating current carry out grid-connected to network system in；In order to increase the work of solar panel
Make operating efficiency, the change informations such as the direction that the sun rotates will be detected the moment, change information is rotated to adjust the sun according to the sun
The direction of cell panel, then now need to obtain sun rotation change information (inclusion angle, direction by photovoltaic tracking controller
Deng relevant parameter information)；In the tracking control system of the photovoltaic plant of the present invention, first-selection will detect the ring of current power supply grid
Border change information, if weather is normal, when being in state on daytime, photovoltaic tracking controller power taking process is：Array photovoltaic module
Send out direct current, direct current is sent and is converted to alternating current to inverter, during alternating current is connected to the grid, photovoltaic tracking controller from
Power taking in electrical network；Also include, weather is normal, is in state on daytime, and now electrical network occur extremely, then, photovoltaic tracking controls
Device power taking from array photovoltaic module；If when night, directly from electrical network power taking, the electricity of electrical network is derived from photovoltaic tracking controller
In national grid, photovoltaic tracking controller is made to be constantly in working condition.
In the present invention, there is provided multiple power supply modes, ensured that photovoltaic tracking controller is constantly in working condition, led to
Cross the scheme that increased from array photovoltaic group power taking, greatly reduce the laying of on-site cable so that tracking system is in the face of changeable
Power station environment more flexibly reliable, communication quality is relatively reliable, monitoring power station has been accomplished not because internal field power unstable
Uninterrupted, and cost reduces substantially.
Preferably, also include controller supply module 50 to include：AC-DC power supply unit 52, input is connected in parallel on described inverse
Become the output end of device 20 and the connection end of public electric wire net 30, output end is electrically connected with described photovoltaic tracking controller 60, will be described
After the alternating current of the connection end of the output end of inverter 20 and public electric wire net 30 carries out rectification process, form direct current and supply described light
Volt tracking control unit 60 normal work.
Preferably, described controller supply module 50 also includes：DC-DC power supply unit 53, input is connected in parallel on described inverse
Become the input of device 20 and the connection end of described array photovoltaic module 10, output end is electrically connected with described photovoltaic tracking controller 60
Connect, the direct current that described array photovoltaic module 10 is exported is carried out after pressure regulation process, normal for described photovoltaic tracking controller 60
Work.
Preferably, described controller supply module is by described AC-DC power supply unit 52 and described DC-DC power supply unit 53
The described controller supply module 50 of composition is dual input intelligent switch power source.
Preferably, including described power supply switching submodule 51 is two-way interlock switch, and described two-way interlock switch is arranged on
In described dual input intelligent switch power source.
Specifically, the present embodiment is the another embodiment providing on the basis of a upper embodiment, with reference to Fig. 3,4,5 institute
Show；When electrical network is normal, privileged way works, i.e. the first supply line, simultaneously inversion unit and photovoltaic DC-to-AC converter also normal simultaneously
Net generates electricity.Now, DC switch closure, (interlock judges from the signal switching 2,220V alternating current to switch 1, switch 2 closure
Pressure is judged to be switched 2 closures), switch 3 disconnection, Switching Power Supply is dual input intelligent switch power source, and from inverter
Exchange end is the power taking of AC port, powers to the control cabinet of photovoltaic tracking device, photovoltaic tracking device normal work；Work as electrical grid failure
Or when electrical network disconnects, privileged way is that the first supply line can not power to tracker control cabinet again, enables alternate channel work
Making is the second supply line, now, DC switch closure, interlock judges the signal from switch 2, undertension 220V, sentences
Break signal is 0, switch 2 disconnection, switch 3 closure, and array cell panel is that PV end powers to Switching Power Supply.On above two lines road
During power supply, through dual input intelligent switch power source, and 3 and 2 groups of switch to be switched before the control cabinet power taking of photovoltaic tracking device
The Hu locking device switch becoming is arranged in dual input intelligent switch power source, by detecting whether electrical network occurs exception；Due to first
The electricity of bar circuit is alternating current, and the electricity of Article 2 circuit is direct current, so carried out whole by dual input intelligent switch power source
Stream, internal AC-DC power supply unit of used its, and after pressure regulation is processed, its internal DC-DC power supply unit used, for light
The control cabinet of volt tracker, because the control cabinet of photovoltaic tracking device is by 24V direct current supply.Dual input intelligent switch power source be by
AC-DC power supply unit and DC-DC power supply unit composition, can the reality judgement abnormal to electrical network, first can be completed simultaneously
Circuit and the switching of Article 2 circuit.When supply line is switched to the second supply line from the first supply line, the second power supply
Circuit have 30S～60S time delay connect so that the second supply line can powered hot plug it is ensured that security.
In the present invention, from the AC port power taking of inverter, compare with respect to from the power taking of national grid end, with tracker control
The distance of case processed is shorter, saves substantial amounts of cable；Multiple power supply modes make tracker control cabinet just can normal work, adjust in time
Whole tracking support is to optimum state, it is to avoid bad weather causes to cell panel to damage, thus avoiding economic loss.
Preferably, also include：Data acquisition unit 200, central controller 100；Wherein, described inverter 20, with described light
Volt tracking control unit 60 communication connects；Described data acquisition unit 200, is connected with the communication of described inverter 20；Described central authorities control
Device 100, is connected with the communication of described data acquisition unit 200；Wherein, described photovoltaic tracking controller 60, sends the number of photovoltaic tracking
It is believed that breath, and the server time from described central controller 100 was corrected with photovoltaic tracking controller 60 time；Institute
State inverter, receive, forward the data message from described photovoltaic tracking controller 60 to described data acquisition unit 200, and connect
Receive, forward the server time from described central controller to described photovoltaic tracking controller 60；Described data acquisition unit
200, described photovoltaic tracking controller 60 data message that the described inverter 20 of collection forwards, and receive, to described inverter 20
Forward the server time from described central controller；Described central controller 100, monitors described data acquisition unit 200 and adopts
The data message of collection, and send server time to described data acquisition unit, control described photovoltaic tracking controller 60 normally to transport
OK.
Preferably, the mode that described data acquisition unit 200 is connected with the communication of described inverter 20 includes：Led to by wired
News mode, and/or power carrier communication mode.
Specifically, the present embodiment is the another embodiment providing on the basis of a upper embodiment, with reference to Fig. 3,4,5 institute
Show；In the system of the present invention, the data message of tracking will be sent to central controller 100 by photovoltaic tracking controller 60, need
Inverter 20 to be passed through is forwarded, and data acquisition unit 200 by forward all photovoltaic tracking controllers 60 data message
It is further conveyed to central controller 100 after carrying out data processing；The feature of the communication scheme of the present invention is to omit communication box
On the premise of, the communication port realizing control cabinet to data acquisition unit 200 using the network management system of inverter 20 is direct-connected.Photovoltaic with
Track controller 60 is connected with wired communication mode (RS485) with inverter 20, is electricity between inverter 20 and data acquisition unit 200
Power carrier communication (PLC) or wired communication mode (RS485), preferred with PLC communication modes.Data acquisition unit 200 connects simultaneously
Connect multiple inverters 20；One control cabinet is to an inverter 20 framework；In the present embodiment, photovoltaic tracking controller 60 by photovoltaic with
The fault of the real-time angular of track structure, photovoltaic tracking system fault or photovoltaic tracking controller 60, the key of photovoltaic tracking system
The information such as operational factor are all transmitted by RS485 transmission port to the RS485 transmission port of inverter 20；More than inverter 20 is incited somebody to action
The information that photovoltaic tracking controller 60 transmits, is carried on the cable being connected with data acquisition unit 200 in the way of transparent transmission,
Transmitted in the way of power carrier communication PLC to data acquisition unit 200, data acquisition unit 200 by load information demodulation classification (after
The SEQ.XFER of the defined loading end of platform and demodulating end) after can obtain these information.Data acquisition unit 200 will therefrom simultaneously
The computer server time that centre control room obtains, by PLC communication mass-sending to inverter 20, pass through two-way RS485 passage afterwards
Reach control cabinet, realize carrying out contrast correction with the crystal oscillating circuit time in control cabinet.
In the present invention, a control cabinet, to an inverter 20, saves communication box and some cables, simplifies communications rack
Structure is so that communication quality is more reliable more stable；Inverter 20 passes in the signal of photovoltaic tracking controller 60 data collector 200
One transmission channel is only provided between defeated, does not do any data conversion so as to save the stringing work of communication line so as to save
Cost, saves the waste of the energy.
It should be noted that above-described embodiment all can independent assortment as needed.The above is only the preferred of the present invention
Embodiment it is noted that for those skilled in the art, in the premise without departing from the principle of the invention
Under, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of tracking and controlling method of photovoltaic plant, described photovoltaic plant includes converting light energy into the array of direct current electricity output
Photovoltaic module, direct current is converted to the inverter generating electricity by way of merging two or more grid systems after alternating current with public electric wire net it is characterised in that include：
Step S10 detects the current power supply ambient condition of public electric wire net；
Step S20 when the power supply environment of public electric wire net is normal, switch to input be connected in parallel on the output end of described inverter with
First supply line of the connection end of public electric wire net powers for photovoltaic tracking controller；
Step S30 when the power supply environmental abnormality of public electric wire net, switch to input be connected in parallel on the input of described inverter with
Second supply line of the connection end of described array photovoltaic module powers for described photovoltaic tracking controller；
Step S40 is powered by one of described first supply line or described second supply line, makes described photovoltaic tracking controller
Control direction, the angle of described array photovoltaic module.
2. the control method of photovoltaic tracking controller according to claim 1 is it is characterised in that described first supply line
Including：
Step S21 carries out the alternating current of the output end of described inverter and the connection end of public electric wire net after rectification process, is formed
Direct current supplies described photovoltaic tracking controller normal work.
3. the control method of photovoltaic tracking controller according to claim 1 is it is characterised in that described second supply line
Including：
Step S31 carries out the direct current that described array photovoltaic module exports after pressure regulation process, for described photovoltaic tracking controller
Normal work.
4. a kind of tracking control system of photovoltaic plant, described photovoltaic plant includes converting light energy into the array of direct current electricity output
Photovoltaic module, then direct current is converted to generates electricity by way of merging two or more grid systems with public electric wire net it is characterised in that described tracing control system after alternating current
System includes：Inverter, the first supply line, the second supply line, power supply switching submodule and photovoltaic tracking controller；Its
In,
The input of described inverter is electrically connected with described array photovoltaic module, output end is electrically connected with public electric wire net, will be derived from
After the direct current of described array photovoltaic module is converted to alternating current, generate electricity by way of merging two or more grid systems with public electric wire net；
Described first supply line, input is connected in parallel on the output end of described inverter and the connection end of public electric wire net, output end
Electrically connect with described photovoltaic tracking controller；
Described second supply line, input is connected in parallel on the input of described inverter and the connection of described array photovoltaic module
End, output end is electrically connected with described photovoltaic tracking controller；
Described power supply switching submodule, the current power supply ambient condition of detection public electric wire net, and the supply rings according to public electric wire net
Border is normal/abnormal, and described first supply line/the second supply line of corresponding switching powers to described photovoltaic tracking controller；
Described photovoltaic tracking controller, is electrically connected with described first supply line, described second supply line respectively, by described
One of one supply line/the second supply line powers, and controls direction, the angle of described array photovoltaic module.
5. the control system of photovoltaic tracking controller according to claim 4 is powered it is characterised in that also including controller
Module, described controller supply module includes：
AC-DC power supply unit, input is connected in parallel on the output end of described inverter and the connection end of public electric wire net, output end and institute
State the electrical connection of photovoltaic tracking controller, the alternating current of the output end of described inverter and the connection end of public electric wire net is carried out rectification
After process, form direct current and supply described photovoltaic tracking controller normal work.
6. the control system of photovoltaic tracking controller according to claim 5 it is characterised in that described controller is powered mould
Block also includes：
DC-DC power supply unit, input is connected in parallel on the input of described inverter and the connection end of described array photovoltaic module, defeated
Go out end to electrically connect with described photovoltaic tracking controller, the direct current of described array photovoltaic module output carried out after pressure regulation process,
For described photovoltaic tracking controller normal work.
7. the control system of photovoltaic tracking controller according to claim 6 it is characterised in that described controller is powered mould
The dual input intelligent switch power source that block is made up of described AC-DC power supply unit and described DC-DC power supply unit.
8. the control system of photovoltaic tracking controller according to claim 7 it is characterised in that including, cut by described power supply
Changing submodule is two-way interlock switch, and described two-way interlock switch is arranged in described dual input intelligent switch power source.
9. the control system according to the arbitrary described photovoltaic tracking controller of claim 4-8 is it is characterised in that also include：Number
According to collector, central controller；Wherein, described inverter, is connected with described photovoltaic tracking controller communication；Described data acquisition
Device, is connected with the communication of described inverter；Described central controller, is connected with the communication of described data acquisition unit；Wherein,
Described photovoltaic tracking controller, sends the data message of photovoltaic tracking, and by the server from described central controller
Time was corrected with the photovoltaic tracking controller time；
Described inverter, receives, forwards the data message from described photovoltaic tracking controller to described data acquisition unit, and connect
Receive, forward the server time from described central controller to described photovoltaic tracking controller；
Described data acquisition unit, the described photovoltaic tracking controller data information that the described inverter of collection forwards, and receive, to institute
State inverter and forward the server time from described central controller；
Described central controller, the data message of monitoring described data acquisition unit collection, and send clothes to described data acquisition unit
The business device time, described photovoltaic tracking controller is controlled normally to run.
10. the control system of photovoltaic tracking controller according to claim 9 is it is characterised in that described data acquisition unit
The mode being connected with the communication of described inverter is included：
By wired communication modes, and/or power carrier communication mode.
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| CN107943106A (en) * | 2017-11-17 | 2018-04-20 | 苏州聚晟太阳能科技股份有限公司 | Possess the MPPT header boxs of following function and its control method of use |
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| CN112865339A (en) * | 2021-04-06 | 2021-05-28 | 江苏中信博新能源科技股份有限公司 | Photovoltaic support and photovoltaic support array |
| US11050383B2 (en) | 2019-05-21 | 2021-06-29 | Nextracker Inc | Radial cam helix with 0 degree stow for solar tracker |
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| US11387771B2 (en) | 2018-06-07 | 2022-07-12 | Nextracker Llc | Helical actuator system for solar tracker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106843063A (en) * | 2017-03-01 | 2017-06-13 | 江苏国电铁塔有限公司 | A kind of distributed I/O topological structure for photovoltaic tracking control |
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| US11711051B2 (en) | 2018-03-23 | 2023-07-25 | Nextracker Llc | Multiple actuator system for solar tracker |
| US11283395B2 (en) | 2018-03-23 | 2022-03-22 | Nextracker Inc. | Multiple actuator system for solar tracker |
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| CN111405487A (en) * | 2020-03-23 | 2020-07-10 | 江苏中信博新能源科技股份有限公司 | Communication device, system, method and communication box |
| CN111404800B (en) * | 2020-03-25 | 2020-12-15 | 江苏中信博新能源科技股份有限公司 | Hybrid networking communication system and method |
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| CN112865339A (en) * | 2021-04-06 | 2021-05-28 | 江苏中信博新能源科技股份有限公司 | Photovoltaic support and photovoltaic support array |
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