CN106385052B - A kind of photovoltaic inverting system - Google Patents
A kind of photovoltaic inverting system Download PDFInfo
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- CN106385052B CN106385052B CN201610956794.8A CN201610956794A CN106385052B CN 106385052 B CN106385052 B CN 106385052B CN 201610956794 A CN201610956794 A CN 201610956794A CN 106385052 B CN106385052 B CN 106385052B
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- inverter
- breaker
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- 238000004804 winding Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
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- H02J3/383—
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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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
Abstract
The invention proposes a kind of photovoltaic inverting system (1), the integration of equipments such as inverter unit and double transformer with split winding (4), combined electrical apparatuses (5) are arranged the system, and all monitoring informations are uniformly accessed into central controller (9) in system, by interface unified in display unit (8), the corresponding display data of the system are managed.Relative to existing photovoltaic system, eliminate the breaker and lightning protection device, the breaker and lightning protection device that eliminate inverter unit outlet side of low-pressure side in traditional double transformer with split windings, circuit design is simplified, it reduces equipment cost, reduce field engineering construction volume, the reliability of equipment is improved, there is stronger practicability.
Description
Technical field
The present invention relates to a kind of photovoltaic inverting systems, belong to the technology of photovoltaic generating system inversion, the integration apparatus that boosts
Field.
Background technique
In recent years, countries in the world are all being increased to the supporting dynamics of new and renewable energy, new energy and renewable
Concern of the development of the energy increasingly by countries in the world.Solar energy power generating is nexhaustible as one kind, reserves are huge
Green regenerative energy sources are just grown rapidly in the world, and parallel network power generation is just becoming one of China's new energy application
Hot spot and bright spot.
Fig. 1 gives the in-site installation schematic diagram in box inverter room and box type transformer in existing photovoltaic system.At present
In the design scheme of photo-voltaic power generation station, box inverter room and box type transformer are arranged as two sets of independent electrical equipments, it
Provided by different producer, and in engineer application, two equipment require to pour independent reinforced concrete basis, each other
Between be separated by certain mounting distance, using three-phase alternating current cable connect.It is adopted moreover, respectively monitoring system in conventional photovoltaic power station
With decentralized design, different circuit units is mostly used to be monitored the operating parameter of box type transformer and inverter greatly, it is this
The mode of decentralized design uses excessive circuit block, and integrated level is low, circuit block by different supplier's productions, installation,
Debugging causes the management to electricity generation system inconvenient.
Scheme/give the electrical schematic diagram in box inverter room and box type transformer in existing photovoltaic system.Box inversion
Device room and box type transformer are independently arranged, and two inverter low-pressure sides in box inverter room access double divisions by cable
Then transformer accesses the medium voltage network in power grid or power station by combined electrical apparatus.Wherein become using the double divisions of measurement and control unit monitoring
Electric current, voltage and the temperature conditions of depressor using the operating parameter of inverter monitoring unit monitoring inverter, and pass through data
Acquisition unit connects power station centralized control center, carries out data interaction.
This design scheme is primarily present following deficiency：
The first, it is spaced relatively close, reuse partial electric device in equipment in two device spaces, causes device application wave
Take and there are certain power consumptions；
The second, it is connected between box inverter room and box type transformer using electric cable with large cross-section, lays pole in site operation
It may cause the unreliable of connection especially when constructing in winter for inconvenience；
Third, box inverter room and box type transformer need to pour two reinforced concrete bases as two equipment,
Increase construction time and cost；
4th, there may be disunity, needing will be different for the producer of various equipment used in grid-connected photovoltaic system
The case equipment of producer assembles, and may cause between the equipment of different manufacturers and unmatched problem occurs.
Summary of the invention
For above-mentioned deficiency in the prior art, the present invention provides a kind of photovoltaic inverting systems, by inverter and double points
Depressor of fissioning is integrally disposed, and using central controller instead of the measurement and control unit and inversion list in traditional double transformer with split windings
The monitoring unit of member, the one-stop acquisition and control for solving monitoring information all in photovoltaic inverting system have more scientific
Reasonable integrated configuration has higher safety and stability.
The embodiment of the invention provides a kind of photovoltaic inverting system, including it is the first inverter (/), the second inverter (3), double
Transformer with split winding (4), central controller (9), display unit (8) and combined electrical apparatus (5), the middle packet of first inverter (/)
The first DC/AC converting unit (6), the first breaker (10) are included, includes the second direct current/friendship in second inverter (3)
Stream-converting unit (7), the second breaker (11), it is characterised in that：First inverter (/) and the second inverter (3) it is defeated
Enter end and photovoltaic module is connected by first breaker (10) and the second breaker (11) respectively, output end directly connects respectively
It is connected to the low-pressure side of double transformer with split windings (4)；The central controller (9) is unified to monitor first DC/AC turn
Change unit (6), the second DC/AC converting unit (7), the electric signal of double transformer with split windings (4) and combined electrical apparatus (5), root
The control to first breaker (10), the second breaker (11) and combined electrical apparatus (5) is realized according to monitoring result；In described
Centre controller (9) is connect with the display unit (8), is realized to first inverter (/), the second inverter (3), double divisions
The information centralized displaying and setting of transformer (4) and combined electrical apparatus (5)；The outlet side of double transformer with split windings (4) connects institute
State the input terminal of combined electrical apparatus (5)；The output end of the combined electrical apparatus (5) is connect with power grid, realizes the conveying to electric energy.
Preferably, the output end of the first inverter and the second inverter passes through disconnecting switch respectively is connected to double divisions
The low-pressure side of transformer.
Preferably, the central controller includes the first communication unit, the second communication unit, signal acquisition unit, data
Processing unit, electrical control unit；First communication unit and first inverter, the second inverter, display unit are handed over
Change data；Second communication unit exchanges data with power station centralized control center；Signal acquisition unit acquisition double divisions
The status signal of the temperature signal of transformer, combined electrical apparatus；The data processing unit to input central controller signal into
Row logical process；The electric control unit is according to the input signal of the data processing unit, to first breaker,
Two breakers and combined electrical apparatus carry out tripping control.
Preferably, first breaker and the second breaker can be replaced using the combinational circuit of disconnecting switch and fuse
Generation.
Preferably, first breaker and the second breaker can be replaced using multiple breaker parallel connections with smaller capacity
Generation.
Preferably, the electric signal includes at least one of voltage, electric current and temperature signal.
Preferably, the monitoring result is shown by the display unit.
Preferably, the first DC/AC converting unit and the second DC/AC converting unit include DC filtering
Device, inverter bridge, alternating current filter and A.C. contactor.
Preferably, the combined electrical apparatus includes fuse, on-load switch, disconnecting switch and lightning protection device.
Preferably, the present invention provides a kind of control method for photo-voltaic power generation station, which is characterized in that the method is used to
Control disclosed in this invention photovoltaic inverting system.
Compared with prior art, there are following technical effects by the present invention：
The first, box type transformer (change of abbreviation case) low-pressure side input breaker, lightning protection device and inverter outlet side are saved
Breaker, lightning protection device, save equipment cost.
The second, the circuit unit for reducing decentralized design improves the integrated level and friendly interface of monitoring unit, more
Live operation maintenance personnel is facilitated to overhaul.
Third shortens the cable that case becomes between inverter, reduces the construction time, improves cable connection reliability.
4th, field device lifting, the time of installation and expense are reduced.
Detailed description of the invention
Fig. 1 is the in-site installation schematic diagram in box inverter room and box type transformer in existing photovoltaic system；
Fig. 2 is the electrical schematic diagram in box inverter room and box type transformer in existing photovoltaic system；
Fig. 3 is the electrical schematic diagram of the first embodiment of photovoltaic inverting system of the present invention；
Fig. 4 is the electrical schematic diagram of the second embodiment of photovoltaic inverting system of the present invention；
Fig. 5 is the circuit structure diagram of central controller of the present invention；
Appended drawing reference：Description of symbols in attached drawing, 1-photovoltaic inverting system ,/the-first inverter, the 3-the second inversion
Device, 4-bis- transformer with split windings, 5-combined electrical apparatuses, 5_1-fuse, 5_/- on-load switch, 5_3-disconnecting switch, 5_4-
Lightning protection device, the 6-the first DC/AC converting unit, the 7-the second DC/AC converting unit, 8-display units, 9-centers
Controller, 9_1-electrical control unit, 9_/- signal acquisition unit, 9_3-digital processing element, the communication of 9_4-second are single
Member, the first communication unit of 9_5-, the 10-the first breaker, the 11-the second breaker, the 1/-the first disconnecting switch, 13-the second
Disconnecting switch.
Specific embodiment
Below in conjunction with attached drawing, further details of narration is done to technical solution provided in an embodiment of the present invention.
Referring to attached drawing 3,4, photovoltaic inverting system of the invention (1) is in photo-voltaic power generation station, which will
The integration of equipments setting such as inverter unit and double transformer with split winding (4), combined electrical apparatuses (5), the input terminal of the inverter unit
The direct current energy that photovoltaic module (for example, by using solar panel) provides is received, and the electric energy is converted into for double division transformations
Received exchange electric boost is ultimately converted to voltage appropriate by device (4) received alternating current, double transformer with split windings (4)
(such as exchange 1kV-/0kV), by combined electrical apparatus (5) feeding power grid, all monitoring information systems in photovoltaic inverting system (1)
One access central controller (9) manages the system and corresponding display data by interface unified in display unit (8).
Embodiment one：
Referring to attached drawing 3, above-mentioned inverter unit includes the first inverter (/) and the second inverter (3), the first inverter
It include the first DC/AC converting unit (6) and the first breaker (10) in (/)；It include second in second inverter (3)
DC/AC converting unit (7) and the second breaker (11)；DC/AC converting unit in the present invention can be this field
Any device that can convert direct current into exchange preferably comprises DC filter, inverter bridge, alternating current filter and connects with exchanging
Tentaculum.
Preferably, first breaker (10) and the second breaker (11) can use the group of disconnecting switch and fuse
Close circuit substitution；Preferably, first breaker (10) and the second breaker (11) can also use multiple with smaller capacity
Breaker parallel connection substitution；Term " capacity is smaller " refers to the appearance relative to first breaker (10) and the second breaker (11)
Amount.
The input terminal of first inverter (/) and the second inverter (3) passes through the first breaker (10) and the second open circuit respectively
Device (11) connects photovoltaic module, it is preferable that connects lightning protection device in the input terminal；Its output end is directly connected in double divisions and becomes
The low-pressure side of depressor (4)；The input side of outlet side connection combined electrical apparatus (5) of double transformer with split windings (4), the combined electrical apparatus
(5) outlet side is connect with power grid, realizes the conveying to electric energy.
Embodiment two：
Referring to attached drawing 4, above-mentioned inverter unit includes the first inverter (/) and the second inverter (3), the first inverter
It include the first DC/AC converting unit (6), the first breaker (10) and the first disconnecting switch (1/) in (/)；Second inversion
It include the second DC/AC converting unit (7), the second breaker (11) and the second disconnecting switch (13) in device (3)；The present invention
In DC/AC converting unit can be any device that can convert direct current into exchange in this field, preferably comprise direct current
Filter, inverter bridge, alternating current filter and A.C. contactor.
The input terminal of first inverter (/) and the second inverter (3) passes through the first breaker (10) and the second open circuit respectively
Device (11) connects photovoltaic module, it is preferable that connects lightning protection device in the input terminal；Its output end passes through described first respectively keeps apart
It closes (1/) and the second disconnecting switch (13) is connected to the low-pressure side of double transformer with split windings；The output of double transformer with split windings (4)
Side connects the input side of combined electrical apparatus (5), and the outlet side of the combined electrical apparatus (5) is connect with power grid, realizes the conveying to electric energy.
Using above-mentioned disconnecting switch so that the part for needing to have a power failure in power grid with inverter unit live part reliably
Isolation, to guarantee that the safety of service work carries out.
In two corresponding photovoltaic inverting system (1) of above-described embodiment one and embodiment, central controller (9) are provided with,
The central controller (9) is unified to monitor the DC/AC converting unit (6,7), double transformer with split windings (4) and combined electrical apparatus
(5) electric signal is realized according to monitoring result to first breaker (10), the second breaker (11) and combined electrical apparatus
(5) tripping control；When monitoring fault message, the tripping order of device for switching is issued by central controller (9)；In described
Centre controller (9) is connect with the display unit (8), is realized to first inverter (/), the second inverter (3), double divisions
The information centralized displaying and setting of transformer (4) and combined electrical apparatus (5).
It in two corresponding photovoltaic inverting system (1) of above-described embodiment one and embodiment, is provided with combined electrical apparatus (5), even
Connect the output end of double transformer with split windings (4)；Voltage (such as exchange 1kV-/0kV) after double transformer with split windings (4) conversion, leads to
Combined electrical apparatus (5) final output is crossed to power grid.Combined electrical apparatus (5) it is internal it is mountable have fuse (5-1), on-load switch (5- /),
Disconnecting switch (5-3) and lightning protection device (5-4), further increase safety, the stability in power station.
It include the first communication unit (9_5), the second communication unit (9_4), signal in central controller (9) referring to attached drawing 5
Acquisition unit (9_ /), data processing unit (9_3) and electrical control unit (9_1)；During the electrical control unit (9_1) is
The data processing core unit of controller (9) is entreated, is responsible for handling received data.First communication unit (9_5) and institute
State the first inverter (/), the second inverter (3) and display unit (8) exchange data；Second communication unit (9_4) and power station
Centralized control center exchanges data；Signal acquisition unit (9_ /) acquires temperature signal and the combination of double transformer with split windings (4)
The status signal of electric appliance (5)；Data processing unit (9_3) carries out logical process to the signal of input central controller (9)；Electric appliance
Control unit (9_1) breaks to first breaker (10), second according to the input signal of the data processing unit (9_3)
Road device (11) and combined electrical apparatus (5) carry out tripping control.
Photovoltaic inverting system (1) of the invention is due to being integrated with inverter unit and double transformer with split windings, and by system
In all monitoring information be uniformly accessed into central controller (9), relative to existing photovoltaic system, eliminate traditional double division transformations
The breaker of input side (also referred to as low-pressure side) and lightning protection device, the breaker for eliminating inverter unit outlet side and lightning protection in device
Device further saves production cost；Meanwhile from the aspect of control, the measurement and control unit in traditional double transformer with split windings is eliminated
It is ordered when detecting fault message by central controller (9) unified tripping for issuing device for switching with the monitoring unit of inverter
It enables.
Correspondingly, the electrical circuit diagram of photovoltaic inverting system disclosed in literature record and essence according to the present invention, it is right
The control method answered is also in scope disclosed by the invention.That is, invention also discloses a kind of controlling parties for photo-voltaic power generation station
Method, the method are used to control above-mentioned photovoltaic inverting system.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of photovoltaic inverting system, including the first inverter (2), the second inverter (3), double transformer with split windings (4), center control
Device (9), display unit (8) and combined electrical apparatus (5) processed include that the first DC/AC is converted in first inverter (2)
Unit (6), the first breaker (10) include the second DC/AC converting unit (7) in second inverter (3), second disconnected
Road device (11), it is characterised in that：The input terminal of first inverter (2) and the second inverter (3) passes through described first respectively
Breaker (10) and the second breaker (11) connect photovoltaic module, and output end is directly connected in double transformer with split windings respectively
(4) low-pressure side；The central controller (9) is unified to monitor the first DC/AC converting unit (6), the second direct current/friendship
The electric signal of stream-converting unit (7), double transformer with split windings (4) and combined electrical apparatus (5) is realized according to monitoring result to described the
The control of one breaker (10), the second breaker (11) and combined electrical apparatus (5)；The central controller (9) and the display
Unit (8) connection, is realized to first inverter (2), the second inverter (3), double transformer with split windings (4) and combined electrical apparatus
(5) information centralized displaying and setting；The outlet side of double transformer with split windings (4) connects the input of the combined electrical apparatus (5)
End；The output end of the combined electrical apparatus (5) is connect with power grid, realizes the conveying to electric energy.
2. system according to claim 1, which is characterized in that the output end of the first inverter (2) and the second inverter (3)
The low-pressure side of double transformer with split windings (4) is connected to by the first disconnecting switch (12) and the second disconnecting switch (13) respectively.
3. system according to claim 1 or 2, which is characterized in that the central controller (9) includes the first communication unit
(9_5), the second communication unit (9_4), signal acquisition unit (9_2), data processing unit (9_3) and electrical control unit
(9_1)；First communication unit (9_5) and first inverter (2), the second inverter (3) and display unit (8) are handed over
Change data；Second communication unit (9_4) exchanges data with power station centralized control center；Signal acquisition unit (9_2) acquisition
The temperature signal of double transformer with split windings (4) and the status signal of combined electrical apparatus (5)；The data processing unit (9_3)
Logical process is carried out to the signal of input central controller (9)；The electrical control unit (9_1) is according to the data processing list
The input signal of first (9_3), threads off to first breaker (10), the second breaker (11) and combined electrical apparatus (5)
Control.
4. system according to claim 1 or 2, which is characterized in that first breaker (10) and the second breaker
It (11) can be using the combinational circuit of disconnecting switch and fuse substitution.
5. system according to claim 1 or 2, which is characterized in that first breaker (10) and the second breaker
It (11) can be using multiple breaker parallel connection substitutions with smaller capacity.
6. system according to claim 1 or 2, which is characterized in that the electric signal includes voltage, electric current and temperature letter
At least one of number.
7. system according to claim 1 or 2, which is characterized in that the monitoring result by the display unit (8) into
Row display.
8. system according to claim 1 or 2, which is characterized in that the first DC/AC converting unit (6) and
Two DC/AC converting units (7) include DC filter, inverter bridge, alternating current filter and A.C. contactor.
9. system according to claim 1 or 2, which is characterized in that the combined electrical apparatus (5) includes fuse (5-1), bears
Lotus switchs (5-2), disconnecting switch (5-3) and lightning protection device (5-4).
10. a kind of control method for photo-voltaic power generation station, which is characterized in that the method is used to control such as claim 1-9
One of described in photovoltaic inverting system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610956794.8A CN106385052B (en) | 2016-11-03 | 2016-11-03 | A kind of photovoltaic inverting system |
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| CN201610956794.8A CN106385052B (en) | 2016-11-03 | 2016-11-03 | A kind of photovoltaic inverting system |
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| CN106385052B true CN106385052B (en) | 2018-11-16 |
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| CN108063596A (en) * | 2017-12-22 | 2018-05-22 | 中民新科（北京）能源技术研究院有限公司 | A kind of photovoltaic generating system and its control method |
| CN110858719A (en) * | 2018-08-24 | 2020-03-03 | 阳光电源股份有限公司 | Integrated medium-voltage photovoltaic grid-connected system and control method |
| TWI737547B (en) * | 2020-11-23 | 2021-08-21 | 力瑪科技股份有限公司 | Solar DC feeder disaster prevention system |
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| CN204668964U (en) * | 2015-04-17 | 2015-09-23 | 广东明阳龙源电力电子有限公司 | A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure |
| CN105375519A (en) * | 2015-11-20 | 2016-03-02 | 湖南红太阳新能源科技有限公司 | Grid-connected photovoltaic power generation system and control method therefor |
| CN205178350U (en) * | 2015-12-04 | 2016-04-20 | 天津市德诺电气有限公司 | Novel integrated form photovoltaic contravariant booster stations |
| CN206180595U (en) * | 2016-11-03 | 2017-05-17 | 中民新能投资集团有限公司 | A photovoltaic inverter system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7489051B2 (en) * | 2006-12-19 | 2009-02-10 | Liebert Corporation | Adaptive power system with improved efficiency and distribution space reduction |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204668964U (en) * | 2015-04-17 | 2015-09-23 | 广东明阳龙源电力电子有限公司 | A kind of photovoltaic inversion is boosted integrated generating main circuit topological structure |
| CN105375519A (en) * | 2015-11-20 | 2016-03-02 | 湖南红太阳新能源科技有限公司 | Grid-connected photovoltaic power generation system and control method therefor |
| CN205178350U (en) * | 2015-12-04 | 2016-04-20 | 天津市德诺电气有限公司 | Novel integrated form photovoltaic contravariant booster stations |
| CN206180595U (en) * | 2016-11-03 | 2017-05-17 | 中民新能投资集团有限公司 | A photovoltaic inverter system |
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