CN106505946A - A kind of photovoltaic generating system and its control method - Google Patents
A kind of photovoltaic generating system and its control method Download PDFInfo
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- CN106505946A CN106505946A CN201610959470.XA CN201610959470A CN106505946A CN 106505946 A CN106505946 A CN 106505946A CN 201610959470 A CN201610959470 A CN 201610959470A CN 106505946 A CN106505946 A CN 106505946A
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- 238000010248 power generation Methods 0.000 description 5
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The invention discloses a kind of photovoltaic generating system and its control method, inverter and box type transformer are carried out integrated, inverter unit and transformer unit is made to be located in a machine room, two single rooms need not be built and place inverter and box type transformer respectively, reduce the cable usage amount between two equipment, and part lightning protection device is reduced, equipment cost and difficulty of construction is reduced, the system Construction time is shortened；Make integrated after inverter unit and transformer unit share a supervising device, that is central controller, when central controller is detected in inverter unit and transformer unit, any one breaks down when, combined electrical apparatus can be threaded off by central controller in time, inverter unit and transformer unit is made to be simultaneously in off-position, so as to ensure that the safety of inverter unit and transformer unit.
Description
Technical field
The present invention relates to power equipment system, more particularly to a kind of photovoltaic generating system and its control method.
Background technology
In recent years, for the whole world that the concern of environmental problem promotes the photovoltaic generating system using generating by solar is installed,
Large-sized solar power plant throughout world various places equipped with large-scale photovoltaic electricity generation system.
Refering to shown in Fig. 1, in existing photovoltaic generating system, unidirectional current is produced by photovoltaic module, and unidirectional current is passed through
Three-phase alternating current cable transmission is to inverter；The unidirectional current for receiving is converted to input AC electricity by inverter, and this is input into
Alternating current transmission is to box type transformer；The input AC electricity for receiving is converted to middle pressure alternating current transmission extremely by box type transformer
Electrical network.Wherein, inverter input side and outlet side include chopper, in order to be controlled to inverter, meanwhile, box change
Depressor input side also includes chopper, in order to be controlled to box type transformer；Also fill comprising monitoring inverter in inverter
Put, for the monitoring state to inverter；Also include temperature controller, observing and controlling subelement, and data to adopt in box type transformer
Storage, for the monitoring state to box type transformer；And required based on engineering safety, in input side and the output of inverter
Side includes lightning protection device, further, also includes lightning protection device in the input side and outlet side of box type transformer.
Refering to shown in Fig. 2, in actual applications, respectively inverter and box type transformer is needed to build one comprising coagulation
The room of earth foundation, i.e. inverter room and box type transformer room, inverter are put in inverter room, box type transformer are put into
In box type transformer room, and under normal circumstances, for being disposed adjacent, distance is 5 meters to 10 meters for inverter room and box type transformer room.
As can be seen here, part needed for existing photovoltaic generating system is present is more, and construction cost is high, builds complexity height, if
The problem of standby set-up time length.
Content of the invention
The embodiment of the present invention provides a kind of photovoltaic generating system and its control method, builds in order to solve to exist in prior art
If high cost, complexity height, the problem of equipment set-up time length is built.
Concrete technical scheme provided in an embodiment of the present invention is as follows：
A kind of first aspect, there is provided photovoltaic generating system, including photovoltaic module, inverter unit, transformer unit, and
Central controller, wherein：The photovoltaic module is connected with the inverter unit；The inverter unit includes the first lightning protection
Device, chopper, AC/DC conversion subunit；Wherein, the input of the chopper and the AC/DC conversion subunit
Side is connected, and first lightning protection device is connected with the input side of the AC/DC conversion subunit；The transformer unit
Including two-winding transformer, and combined electrical apparatus；Wherein, the input side of the two-winding transformer is turned with the AC/DC
The outlet side for changing subelement is connected, and the outlet side of the two-winding transformer is connected with the combined electrical apparatus；The central authorities
Controller respectively with the chopper, the AC/DC conversion subunit, the two-winding transformer, and the combination
Electrical equipment is connected, and for obtaining the state parameter of the AC/DC conversion subunit, and obtains the two-winding transformer
Relevant parameter, and the state parameter and the two-winding transformer according to the AC/DC conversion subunit for obtaining
Relevant parameter, controls the chopper or the combined electrical apparatus is threaded off.
In conjunction with a first aspect, in the first possible implementation, the system also includes display device, the display
Device is connected with the central controller, for assuming the data of the central controller transmission, and to central authorities' control
Device sends instruction.
In conjunction with a first aspect, or in the first possible implementation of first aspect, in second possible realization
In mode, the combined electrical apparatus includes fuse, on-load switch, the second lightning protection device, and disconnecting switch；Wherein, described second
Lightning protection device is connected with the combined electrical apparatus input side, and the fuse is connected with the outlet side of the two-winding transformer.
In conjunction with second possible implementation of first aspect, in the third possible implementation, central authorities' control
Device processed includes electrical equipment control subelement, digital processing subelement, the first communication subelement, the second communication subelement, and signal
Collection subelement；Wherein, the digital processing subelement respectively with signals collecting subelement, electrical equipment control subelement, first lead to
News subelement and the second communication subelement are connected, for receiving the two-winding transformer of signals collecting subelement collection
The state parameter of the AC/DC conversion subunit that relevant parameter and the first communication subelement send, and according to institute
The information that the first communication subelement and the second communication subelement send is stated, the data is processed, electrical equipment control is generated and is referred to
Order and data processed result, electrical equipment control instruction is sent to the electrical equipment control subelement, and by the data
Reason result is sent to the described first communication subelement, and the relevant parameter of the two-winding transformer, the AC/DC are changed
The state parameter of subelement and the data processed result are sent to the described second communication subelement.
In conjunction with second possible implementation of first aspect, in the 4th kind of possible implementation, the photovoltaic is sent out
Electric system also includes that power station centralized control center, the power station centralized control center are connected with the central controller, described for receiving
The data are analyzed and are sent to the central controller with generating analysis instruction by the data of central controller collection, with
And other control instructions are sent to the central controller.
In conjunction with second possible implementation of first aspect, in the 5th kind of possible implementation, the photovoltaic is sent out
Electric system also includes that electrical network, the electrical network are connected with the disconnecting switch in the combined electrical apparatus.
In conjunction with second possible implementation of first aspect, in the 6th kind of possible implementation, the photovoltaic is sent out
Electric system also includes disconnecting switch, and described disconnecting switch one end connects the outlet side of the AC/DC conversion subunit, described
The other end of disconnecting switch connects the input side of the two-winding transformer.
A kind of second aspect, there is provided control method of photovoltaic generating system, is applied in above-mentioned photovoltaic generating system, described
Method includes：The central controller obtains the relevant parameter of the two-winding transformer in real time；Wherein, the double winding transformation
The relevant parameter of device includes the temperature value of the two-winding transformer, the line voltage value of the two-winding transformer, the double wrap
The phase current values of group transformator；When the relevant parameter that the central controller detects the two-winding transformer meets default bar
During part, combined electrical apparatus described in the central controller controls is threaded off, and wherein, the relevant parameter of the two-winding transformer meets in advance
If condition includes at least one in following three, the temperature value for getting reaches preset temperature threshold value, the line electricity for getting
Pressure value reaches default line voltage threshold value, and the phase current values for getting reach default phase current threshold value；The central controller
The state parameter of the AC/DC conversion subunit is obtained in real time；Wherein, the state of the AC/DC conversion subunit
Parameter includes the input voltage value of the AC/DC conversion subunit, the output voltage of the AC/DC conversion subunit
The output current value of value, the input current value of the AC/DC conversion subunit and the AC/DC conversion subunit；
When the state parameter that the central controller detects the AC/DC conversion subunit meets failure state conditions, institute
State combined electrical apparatus described in central controller controls to thread off, wherein, the state parameter of the AC/DC conversion subunit meets event
Including at least at least one in following four, the input voltage value of the AC/DC conversion subunit reaches barrier status condition
Predeterminated voltage threshold value is arrived, the output voltage values of the AC/DC conversion subunit reach predeterminated voltage threshold value, described straight
The input current value of stream/exchange conversion subunit reaches predetermined current threshold value, the output of the AC/DC conversion subunit
Current value reaches predetermined current threshold value.
In conjunction with second aspect, in the first possible implementation, when the photovoltaic generating system includes display device
When, methods described also includes：The display device receives the data processed result that the central controller sends, and presents described
Data processed result；When the display device receives the configured information of user input, phase is generated according to the configured information
The instruction that answers, and the instruction is sent to the central controller.
In conjunction with second aspect, or second aspect the first possible implementation, in second possible implementation
In, methods described also includes：When the combined electrical apparatus is threaded off, the combined electrical apparatus itself will have switched to trip status information
Send to the central controller.
In the embodiment of the present invention, photovoltaic generating system includes photovoltaic module, inverter unit and transformer unit, Yi Jizhong
Centre controller；Inverter unit only includes the first lightning protection device, chopper, and AC/DC conversion subunit；Transformer unit
Including two-winding transformer, and combined electrical apparatus；The central controller is used for obtaining the AC/DC conversion subunit
State parameter, and the relevant parameter of the two-winding transformer is obtained, and single according to AC/DC conversion for obtaining
The relevant parameter of the state parameter and the two-winding transformer of unit, controls the chopper or the combined electrical apparatus is threaded off.
Technical solution of the present invention is adopted, in a first aspect, inverter and box type transformer are carried out integrated, inverter unit and transformator is made
Unit is located in a machine room, need not be built two single rooms and be placed inverter and box type transformer respectively, reduce two
Cable usage amount between individual equipment, reduces equipment investment cost and difficulty of construction, shortens the system Construction time；Second party
Face, inverter and transformator are integrated into after an equipment, it is only necessary to which equipment input side and outlet side after the integration is respectively installed
One lightning protection device, saves the lightning protection device of inverter unit outlet side and transformer unit input side, is ensureing photovoltaic generation
On the basis of security of system energy, system equipment cost of investment is reduce further, shorten the system set-up time；Third party
Face, make integrated after inverter unit and transformer unit share a supervising device, i.e. central controller, work as central controller
When detecting that any one breaks down in inverter unit and transformer unit, central controller can in time by combined electrical apparatus
Threading off, making inverter unit and transformer unit be simultaneously in off-position, so as to ensure that inverter unit and transformator list
The safety of unit；Meanwhile, integrated after photovoltaic generating system, only by central controller can simultaneously to inverter unit and
Transformer unit is monitored, and without data acquisition unit, monitoring inverter device and measurement and control unit, farthest simplifies
The problem of photovoltaic power generating system device redundancy, operability are higher.
Description of the drawings
Fig. 1 is photovoltaic power generation system structure schematic diagram one in prior art；
Fig. 2 is photovoltaic power generation system structure schematic diagram two in prior art；
Fig. 3 is photovoltaic power generation system structure schematic diagram one in the embodiment of the present invention；
Fig. 4 is the central controller structural representation in the embodiment of the present invention in photovoltaic generating system；
Fig. 5 is photovoltaic power generation system structure schematic diagram two in the embodiment of the present invention；
Fig. 6 is photovoltaic generating system control flow chart in the embodiment of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, to the embodiment of the present invention in technical scheme be clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Embodiment in based on the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Below in conjunction with the accompanying drawings the preferred embodiment of the present invention is described in detail.
Embodiment one
Refering to shown in Fig. 3, it is photovoltaic power generation system structure schematic diagram in the embodiment of the present invention；In the photovoltaic generating system
In, the middle pressure system comprising photovoltaic module 10, inverter unit 11, transformer unit 12, central controller 13, electrical network or power station
System 14, and power station centralized control center 15.
Using above-mentioned technical proposal, inverter and transformator are carried out integrated, even if inverter unit and transformer unit
It is located in a machine room, two single rooms need not be built and place inverter and box type transformer respectively, be reduced two and set
Cable usage amount between standby, reduces construction cost and difficulty of construction, effectively shortens the system Construction time.
In the photovoltaic generating system shown in Fig. 3, photovoltaic module 10 is connected with inverter unit 11, for producing direct current
Electricity；Inverter unit 11 is connected with transformer unit 12, for the unidirectional current that photovoltaic module 10 is produced is converted to alternating current；
Transformer unit 12 is connected with the medium voltage network 14 in electrical network or power station, for entering the alternating current that inverter unit 11 is generated
Row pressure regulation is processed, and is converted to middle pressure alternating current by low-voltage AC；The inverter unit 11 and inverter unit 12 are and institute
State central controller 13 and there is annexation, the central controller 13 is used for obtaining inverter unit 11 and transformer unit 12
All relevant parameters, and according to the relevant parameter generate corresponding instruct, control the inverter unit 11 and transformator list
The relevant action of unit 12, and the instruction according to staff, generate corresponding control instruction and send to 11 He of inverter unit
Transformer unit 12；Power station centralized control center 15 is connected with the central controller 13, for obtaining inverter unit 11 and becoming
All relevant parameters of depressor unit 12, and corresponding instruction, and the finger according to staff are generated according to the relevant parameter
Show, generate corresponding control instruction and send to central controller 13.Optionally, the relevant parameter is including but not limited to described inverse
Become the state parameter of device unit 11, and the state parameter of the transformer unit 12, the state parameter can be magnitude of voltage, electric
Flow valuve, temperature value, phase current values, line voltage value etc.；Relevant action is including but not limited to the combination in dropout transformer unit 12
Electrical equipment, or the chopper in the inverter unit 11 of threading off.Specifically：
The inverter unit 11 includes the first lightning protection device 110, chopper 111, AC/DC conversion subunit 112；Its
In, the chopper 111 is connected with the input side of the AC/DC conversion subunit 112, for disconnecting photovoltaic module 10
With the connection between inverter unit 11；The input of first lightning protection device 110 and the AC/DC conversion subunit 112
Side is connected；The AC/DC conversion subunit 112 includes DC filter, inverter bridge, alternating current filter, and exchange
Catalyst.
The transformer unit 12 includes two-winding transformer 120, and combined electrical apparatus 121；Wherein, the double winding becomes
The input side of depressor 120 is connected with the outlet side of the AC/DC conversion subunit 112, the two-winding transformer 120
Outlet side be connected with the combined electrical apparatus 121, for the low-voltage AC that inverter unit 11 is generated is converted to middle pressure
Alternating current.
The central controller 13 respectively with the chopper 111, the AC/DC conversion subunit 112 is described double
Winding transformer 120, and the combined electrical apparatus 121 is connected, for obtaining the AC/DC conversion subunit 112
State parameter, and the relevant parameter of the two-winding transformer 120 is obtained, and according to the AC/DC conversion for obtaining
The state parameter of subelement 112 and the relevant parameter of the two-winding transformer 120, control the chopper 111 or described
Combined electrical apparatus 121 is threaded off.
Optionally, the photovoltaic generating system also includes display device 16, the display device 16 and central authorities' control
Device 13 is connected, and for assuming the data of the transmission of the central controller 13, and the information according to user input, generates corresponding
Instruction, and the instruction is sent to the central controller 13.
Further, the combined electrical apparatus 121 includes fuse 1210, on-load switch 1211, the second lightning protection device 1212, with
And disconnecting switch 1213；Wherein, second lightning protection device 1212 is connected with 121 input side of the combined electrical apparatus, the fusing
Device 1210 is connected with the outlet side of the two-winding transformer 120.
Optionally, while combined electrical apparatus 121 switches to trip status, itself can be switched to by the combined electrical apparatus 121
The information of trip status is converted to status signal, and the status signal is sent to the central controller 13.
In compared to the existing photovoltaic generating system shown in Fig. 1, consider for engineering safety, need in inverter machine room
The mode of spark gap is respectively mounted with transformator machine room, using embodiment of the present invention technical scheme, by inverter and transformator collection
After becoming an equipment, equipment input side after the integration and outlet side one lightning protection device of each installation can be only needed, is saved
The lightning protection device of inverter unit outlet side and transformer unit input side is removed, on the basis for ensureing photovoltaic generating system security performance
On, system installation cost is reduce further, the system set-up time is shortened.
Further, the disconnecting switch 1213 in the medium voltage network 14 in the electrical network or power station and the combined electrical apparatus 121
It is connected.
Optionally, refering to shown in Fig. 4, the central controller 13 includes electrical equipment control subelement 130, and digital processing is single
Unit 131, the first communication subelement 132, the second communication subelement 133, and signals collecting subelement 134；Wherein, the numeral
Subelement 131 and signals collecting subelement 134 is processed, electrical equipment control subelement 130, the first communication subelement 132 and second are logical
News subelement 133 is connected, for receiving the related ginseng of the two-winding transformer 120 of the collection of signals collecting subelement 134
The state parameter of the AC/DC conversion subunit 112 that number and the described first communication subelement 132 send, and according to institute
The information that the first communication subelement 132 and the second communication subelement 133 send is stated, the data are processed, electrical equipment is generated
Control instruction and data processed result, electrical equipment control instruction is sent to the electrical equipment control subelement 130, and by institute
State data processed result to send to the described first communication subelement 132, by the relevant parameter of the two-winding transformer 120, institute
The state parameter and the data processed result for stating AC/DC conversion subunit 112 is sent to the described second communication subelement
133.
Refering to shown in Fig. 5, the photovoltaic generating system also includes that disconnecting switch 17,17 one end of the disconnecting switch connect institute
The outlet side of AC/DC conversion subunit 112 is stated, the other end of the disconnecting switch 17 connects the two-winding transformer
120 input side.
Compared to the existing photovoltaic generating system shown in Fig. 1, in the embodiment of the present invention, make integrated after inverter unit and
Transformer unit shares a supervising device, i.e. central controller, when central controller detects inverter unit and transformator
When in unit, any one breaks down, combined electrical apparatus can be threaded off by central controller in time, make inverter unit and transformation
Device unit is simultaneously in off-position, so as to ensure that the safety of inverter unit and transformer unit；Meanwhile, integrated after light
Photovoltaic generating system, only can be monitored to inverter unit and transformer unit simultaneously by a central controller, need not
Data acquisition unit, monitoring inverter device and measurement and control unit, farthest simplify photovoltaic power generating system device redundancy
Problem, operability are higher.
Embodiment two
Based on the photovoltaic generating system described in embodiment one, refering to shown in Fig. 6, photovoltaic generating system in the embodiment of the present invention
Control flow, including：
Step 600：The central controller 13 obtains the relevant parameter of the two-winding transformer 120 in real time；When described
When central controller 13 detects the relevant parameter of the two-winding transformer 120 and meets pre-conditioned, the central controller
The 13 controls combined electrical apparatus 121 is threaded off.
In the embodiment of the present invention, the relevant parameter of the two-winding transformer 120 includes the two-winding transformer 120
Temperature value, the line voltage value of the two-winding transformer 120, the phase current values of the two-winding transformer 120.The double winding
The relevant parameter of transformator 120 meets at least one comprising in following three pre-conditioned, and the temperature value for getting reaches pre-
If temperature threshold values, the line voltage value for getting reaches default line voltage threshold value, and the phase current values for getting reach default phase
Current threshold.
Step 610：The central controller 13 obtains the state parameter of the AC/DC conversion subunit 112 in real time；
When the state parameter that the central controller 13 detects the AC/DC conversion subunit 112 meets failure state conditions
When, the central controller 13 controls the combined electrical apparatus 121 and threads off.
In the embodiment of the present invention, the state parameter of the AC/DC conversion subunit 112 includes the AC/DC
The input voltage value of conversion subunit 112, the output voltage values of the AC/DC conversion subunit 112, the direct current/friendship
The output current value of the input current value and the AC/DC conversion subunit 112 of stream conversion subunit 112.The direct current/
The state parameter of exchange conversion subunit 112 meets failure state conditions including at least at least one in following four, described
The input voltage value of AC/DC conversion subunit 112 reaches predeterminated voltage threshold value, the AC/DC conversion subunit
112 output voltage values reach predeterminated voltage threshold value, and the input current value of the AC/DC conversion subunit 112 reaches
Predetermined current threshold value, the output current value of the AC/DC conversion subunit 112 reach predetermined current threshold value.
Further, when the photovoltaic generating system includes display device 16, methods described also includes：The display dress
The data processed result that the 16 receptions central controller 13 sends is put, and assumes the data processed result；When the display
When device 16 receives the configured information of user input, according to the configured information generate corresponding instruct, and by the instruction
Send to the central controller 13.
Further, when the combined electrical apparatus 121 is threaded off, itself can be switched to trip status by combined electrical apparatus 121
Information is converted to status signal, and the status signal is sent to the central controller 13.
In sum, in the embodiment of the present invention, inverter and box type transformer are carried out integrated, makes inverter unit and change
Depressor unit is located in a machine room, need not be built two single rooms and be placed inverter and box type transformer respectively, reduce
Cable usage amount between two equipment, reduces construction cost and difficulty of construction, shortens the system Construction time；Also,
Inverter and transformator are integrated into after an equipment, can only need equipment input side after the integration and outlet side respectively to install
One lightning protection device, saves the lightning protection device of inverter unit outlet side and transformer unit input side, is ensureing photovoltaic generation
On the basis of security of system energy, system installation cost is reduce further, shorten the system set-up time；Further, make
Inverter unit and transformer unit after integrated shares a supervising device, i.e. central controller, when central controller is detected
When in inverter unit and transformer unit, any one breaks down, combined electrical apparatus can be taken off by central controller in time
Button, makes inverter unit and transformer unit be simultaneously in off-position, so as to ensure that inverter unit and transformer unit
Safety；Meanwhile, integrated after photovoltaic generating system, only can be simultaneously to inverter unit and change by central controller
Depressor unit is monitored, and without data acquisition unit, monitoring inverter device and measurement and control unit, farthest simplifies light
The problem of photovoltaic generating system device redundancey, operability are higher.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can adopt complete hardware embodiment, complete software embodiment or with reference to software and hardware in terms of reality
Apply the form of example.And, the present invention can be adopted in one or more computers for wherein including computer usable program code
The upper computer program that implements of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) is produced
The form of product.
The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program
Figure and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or each stream in block diagram
Journey and/or the combination of square frame and flow chart and/or the flow process in block diagram and/or square frame.These computer programs can be provided
Instruct the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices
The device of the function of specifying in present one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to
Make the manufacture of device, the command device realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or
The function of specifying in multiple square frames.
These computer program instructions can be also loaded in computer or other programmable data processing devices so that in meter
Series of operation steps is executed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or
The instruction executed on other programmable devices is provided for realization in one flow process of flow chart or multiple flow processs and/or block diagram one
The step of function of specifying in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into the had altered of the scope of the invention and change.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the embodiment of the present invention
The spirit and scope of bright embodiment.So, if these modifications of the embodiment of the present invention and modification belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of photovoltaic generating system, it is characterised in that including photovoltaic module, inverter unit, transformer unit, and central authorities
Controller, wherein：
The photovoltaic module is connected with the inverter unit；
The inverter unit includes the first lightning protection device, chopper, AC/DC conversion subunit；Wherein, the chopper with
The input side of the AC/DC conversion subunit is connected, first lightning protection device and the AC/DC conversion subunit
Input side be connected；
The transformer unit includes two-winding transformer, and combined electrical apparatus；Wherein, the input side of the two-winding transformer
It is connected with the outlet side of the AC/DC conversion subunit, the outlet side of the two-winding transformer combines electricity with described
Device is connected；
The central controller respectively with the chopper, the AC/DC conversion subunit, the two-winding transformer,
And the combined electrical apparatus is connected, for obtaining the state parameter of the AC/DC conversion subunit, and obtain described
The relevant parameter of two-winding transformer, and the state parameter according to the AC/DC conversion subunit for obtaining and described pair
The relevant parameter of winding transformer, controls the chopper or the combined electrical apparatus is threaded off.
2. the system as claimed in claim 1, it is characterised in that the system also includes display device, the display device with
The central controller is connected, and for assuming the data of the central controller transmission, and sends to the central controller
Instruction.
3. system as claimed in claim 1 or 2, it is characterised in that the combined electrical apparatus includes fuse, on-load switch,
Two lightning protection devices, and disconnecting switch；Wherein, second lightning protection device is connected with the combined electrical apparatus input side, the fusing
Device is connected with the outlet side of the two-winding transformer.
4. system as claimed in claim 3, it is characterised in that the central controller includes electrical equipment control subelement, numeral
Process subelement, the first communication subelement, the second communication subelement, and signals collecting subelement；Wherein, the digital processing
Subelement is connected with signals collecting subelement, electrical equipment control subelement, the first communication subelement and the second communication subelement respectively
Connect, for receiving the relevant parameter and the first communication subelement of the two-winding transformer of signals collecting subelement collection
The state parameter of the AC/DC conversion subunit for sending, and according to the described first communication subelement and the second communication
The data are processed by the information that unit sends, and generate electrical equipment control instruction and data result, by the electrical equipment control
System instruction is sent to the electrical equipment control subelement, and the data processed result is sent single to the described first communication
Unit, at the relevant parameter of the two-winding transformer, the state parameter of the AC/DC conversion subunit and the data
Reason result is sent to the described second communication subelement.
5. system as claimed in claim 3, it is characterised in that the photovoltaic generating system also includes power station centralized control center, institute
State power station centralized control center to be connected with the central controller, for receiving the data of the central controller collection, to described
Data are analyzed and are sent to the central controller with generating analysis instruction, and send other controls to the central controller
System instruction.
6. system as claimed in claim 3, it is characterised in that the photovoltaic generating system also includes electrical network, the electrical network with
Disconnecting switch in the combined electrical apparatus is connected.
7. system as claimed in claim 3, it is characterised in that also include in the inverter unit of the photovoltaic generating system every
Leave pass, described disconnecting switch one end connects the outlet side of the AC/DC conversion subunit, the disconnecting switch another
The input side of the end connection two-winding transformer.
8. a kind of control method of photovoltaic generating system, it is characterised in that be applied to as described in any one of claim 1 to 7
In photovoltaic generating system, methods described includes：
The central controller obtains the relevant parameter of the two-winding transformer in real time；Wherein, the two-winding transformer
Relevant parameter includes that the temperature value of the two-winding transformer, the line voltage value of the two-winding transformer, the double winding become
The phase current values of depressor；When the relevant parameter that the central controller detects the two-winding transformer meet pre-conditioned
When, combined electrical apparatus described in the central controller controls is threaded off, and wherein, the relevant parameter of the two-winding transformer meets to be preset
Condition includes at least one in following three, and the temperature value for getting reaches preset temperature threshold value, the line voltage for getting
Value reaches default line voltage threshold value, and the phase current values for getting reach default phase current threshold value；
The central controller obtains the state parameter of the AC/DC conversion subunit in real time；Wherein, the direct current/friendship
The state parameter of stream conversion subunit includes that the input voltage value of the AC/DC conversion subunit, the AC/DC turn
Change the output voltage values of subelement, the input current value of the AC/DC conversion subunit and AC/DC conversion
The output current value of unit；When the state parameter that the central controller detects the AC/DC conversion subunit meets
During failure state conditions, combined electrical apparatus described in the central controller controls is threaded off；Wherein, AC/DC conversion is single
The state parameter of unit meets failure state conditions including at least at least one in following four, AC/DC conversion
The input voltage value of unit reaches predeterminated voltage threshold value, and the output voltage values of the AC/DC conversion subunit reach pre-
If voltage threshold, the input current value of the AC/DC conversion subunit reaches predetermined current threshold value, the direct current/
The output current value of exchange conversion subunit reaches predetermined current threshold value.
9. method as claimed in claim 8, it is characterised in that when the photovoltaic generating system includes display device, described
Method also includes：
The display device receives the data processed result that the central controller sends, and assumes the data processed result；
When the display device receives the configured information of user input, corresponding instruction is generated according to the configured information,
And send the instruction to the central controller.
10. method as claimed in claim 8 or 9, it is characterised in that methods described also includes：
When the combined electrical apparatus is threaded off, the combined electrical apparatus is sent trip status information itself is had switched to the central authorities
Controller.
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Application publication date: 20170315 |