CN105846458A - Electronic power transformer array based high voltage photovoltaic grid-connected power generation system - Google Patents
Electronic power transformer array based high voltage photovoltaic grid-connected power generation system Download PDFInfo
- Publication number
- CN105846458A CN105846458A CN201610222409.7A CN201610222409A CN105846458A CN 105846458 A CN105846458 A CN 105846458A CN 201610222409 A CN201610222409 A CN 201610222409A CN 105846458 A CN105846458 A CN 105846458A
- Authority
- CN
- China
- Prior art keywords
- changer
- solid
- high pressure
- array
- state transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010248 power generation Methods 0.000 title abstract 3
- 238000003491 array Methods 0.000 claims abstract description 8
- 238000013461 design Methods 0.000 claims abstract description 7
- 230000009466 transformation Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- H02J3/383—
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- H02J3/385—
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses an electronic power transformer array based high voltage photovoltaic grid-connected power generation system which comprises photovoltaic arrays, DC/DC converters, electronic power transformer arrays and an AC power grid. There are m photovoltaic arrays wherein m represents a positive integer greater than two. The output end of each photovoltaic array is connected to the input end of a DC/DC converter. The output ends of all DC/DC converters are jointly in parallel connection to the general current input end of the electronic power transformer arrays. The general current input end of the electronic power transformer arrays is directly connected to the AC high voltage power grid. The system of the invention is small in size, light in weight and environmentally free from pollutions. The means of modularization arrays with current in parallel connection and voltage in series connection helps solve the technical problems seen in high voltage and large capacity power generation. The modularization design facilitates the processes of production, installation and maintenance of an entire system.
Description
Technical field
The present invention relates to a kind of high pressure grid-connected photovoltaic system based on solid-state transformer array, be mainly used in photovoltaic also
Net power field.
Background technology
The structure of the photovoltaic DC field of main flow is that multiple photovoltaic array is connected by header box and DC power distribution cabinet respectively at outfan at present
To the DC side of multiple low pressure photovoltaic combining inverters, multiple low-pressure grid-connection inverters pass through maximal power tracing algorithm at input
(Maximum Power Point Tracking, MPPT) makes photovoltaic array Maximum Power Output, and the outlet side at inverter leads to
Cross Synchronization Control and energy is boosted to high pressure with current source form step by step to electrical network energy feeding, inverter output by Industrial Frequency Transformer
(supertension) AC network, it is achieved the high-power conveying of solar energy.
Along with being continuously increased of generation of electricity by new energy capacity and electric pressure, transmission of electricity, being showing improvement or progress day by day of distribution technique, intelligent grid is not
Disconnected development, the existence of existing photovoltaic generation, Transmission Mode is following to be limited:
(1) using traditional Industrial Frequency Transformer, volume is big, Heavy Weight, transformer oil have pollution to environment, does not possess energy simultaneously
The Based Intelligent Control of amount and the intelligent communication of information.
(2) it is difficult to reply Future New Energy Source generating higher voltage, the trend of more capacity flexible, convenient.
(3) conventional inverter needs centralized net side filter, and volume is big, Heavy Weight, cost are high.
(4) carrying out maximal power tracing control with photovoltaic DC-to-AC converter for unit, the permeability of MPPT is relatively low, causes total system
Inefficient, it is for the anti-interference of uneven illumination problem (blocking of such as cloud, the discordance of photovoltaic array self character)
Property is the most relatively weak.
Summary of the invention
The present invention is to solve the problems referred to above in the presence of prior art, it is proposed that a kind of high press polish based on solid-state transformer array
Photovoltaic grid-connected system, the present invention is by photovoltaic array, DC/DC changer, DC/AC solid-state transformer array and AC network structure
Become, there is the advantage that volume is little, lightweight and environment friendly and pollution-free, it is achieved that electric energy is carried out the mesh of Based Intelligent Control, protection, communication
's.
To achieve these goals, the technical solution used in the present invention is, a kind of high pressure based on solid-state transformer array is grid-connected
Electricity generation system, it is characterised in that: include photovoltaic array, DC/DC changer, solid-state transformer array and AC network；Described
Photovoltaic array have m, m is the positive integer more than or equal to 2, the outfan of each photovoltaic array all with a DC/DC change
The input of parallel operation connects, and the outfan of all of DC/DC changer is jointly parallel to the direct current of solid-state transformer array and always inputs
End, the total outfan of exchange of described solid-state transformer array is directly connected with ac high-voltage electrical network.
Described DC/DC changer uses boost circuit topology, and DC/DC changer independently controls and follows the tracks of and its input phase
The maximum power point of photovoltaic array even, is used for realizing all photovoltaic arrays and realizes peak power simultaneously.
Described solid-state transformer array is made up of 3n solid-state transformer unit, and n is the positive integer more than or equal to 2, described
The direct-flow input end of 3n solid-state transformer unit is the most in parallel, forms the total input of direct current；3n described solid-state transformer list
Unit is equally divided into 3 groups, and the ac output end series connection of n the solid-state transformer unit often organized forms a phase, forms 3 phases, 3 phases altogether
The total outfan of exchange is connected and composed according still further to star-like or angle-style.
Described solid-state transformer unit uses modularized design.
Low voltage DC/AC changer that described solid-state transformer unit includes being sequentially connected with, high frequency transformer, high pressure AC/DC
Changer and high pressure DC/AC changer, first the direct-flow input end of described solid-state transformer unit connects low voltage DC/AC and becomes
The direct-flow input end of parallel operation, the low voltage DC/ac output end of AC changer is connected with the input of high frequency transformer, high frequency transformation
The outfan of device is connected with the ac input end of high pressure AC/DC changer, and the DC output end of high pressure AC/DC changer is with high
The direct-flow input end of pressure DC/AC changer is connected, and the ac output end of high pressure DC/AC changer is solid-state transformer unit
Ac output end.
Described low voltage DC/AC changer, high pressure AC/DC changer and high pressure DC/AC changer all use single-phase H bridge electricity
Road.
Comprising ac filter inductance inside described high pressure DC/AC changer, ac filter inductance is directly and solid-state transformer unit
Ac output end be connected.
Described solid-state transformer unit uses modularized design, and its all constituents is integrated into a module entirety, it is simple to raw
Produce, install, safeguard.
Compared with prior art, the present invention at least has the advantages that
1) this system eliminates the grid-connected transformator of power frequency with the topological feature of solid-state transformer, it is thus achieved that volume is little, lightweight, ring
Protect free of contamination advantage, electric energy can be carried out Based Intelligent Control, protection, communication simultaneously.
2) technology that this system solves high voltage large capcity generating with the modular array way of current parallel, Voltage Series is difficult
Topic, by adjust module in parallel and serial number, can be with flexible access different capabilities, the system of different electric pressure.
3) traditional centralized big filter inductance can be decomposed in each module of series connection by this system, is arranged on high pressure DC/AC
Inside changer, reduce volume and the cost of system.
4) this system uses the structure of high modularization.It is easy to System Expansion, is conducive to shortening engineering design and process-cycle, fall
Low cost, modular power cell uses power switch and the passive device of identical capacity, has the strongest substitutability, it is simple to
System maintenance and Redundancy Design.
5) each photovoltaic array is provided with a DC/DC changer, can independently carry out MPPT maximum power point tracking so that system
Efficiency will be apparently higher than conventional photovoltaic electricity generation system.
Accompanying drawing explanation
Fig. 1 is conventional photovoltaic grid-connected system schematic diagram.
Fig. 2 is the structural representation of the present invention.
Fig. 3 is the schematic diagram of described high pressure DC/AC changer.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention the present invention is described in further detail.
It is illustrated in figure 1 conventional photovoltaic grid-connected system, including photovoltaic array 1, header box 2, DC power distribution cabinet 3, grid-connected
Inverter 4, duplex frequency boostering transformer 5, measure and control device 6 and reactive power compensator 7, photovoltaic array 1 outfan passes through header box
With the DC side that DC power distribution cabinet is connected to photovoltaic combining inverter, combining inverter is made by maximal power tracing algorithm at input
Obtaining photovoltaic array Maximum Power Output, energy is fed energy with current source form to electrical network by Synchronization Control by the outlet side at inverter
Amount, electric energy is boosted to high pressure superelevation by Industrial Frequency Transformer with the form of the current source of line voltage same frequency by inverter output step by step
Pressure AC network, it is achieved the long distance delivery of the energy.
As in figure 2 it is shown, the grid-connected photovoltaic system of the present invention is by photovoltaic array 1, DC/DC changer 2, solid-state transformer battle array
Row 3 and AC network are constituted.
As in figure 2 it is shown, solar panels form different output DC voltage and the photovoltaic array of power grade by the way of series and parallel
1, such photovoltaic array 1 has m, and the numerical value of m depends on the generating capacity of whole system.Each photovoltaic array 1 defeated
Going out all inputs with a DC/DC changer 2 to be connected, described DC/DC changer 2 has m equally, uses boost
Circuit topology, each DC/DC changer 2 carries out MPPT maximum power point tracking and energy control to the photovoltaic array 1 each connected respectively
System is the highest to ensure the generating efficiency of each photovoltaic array 1.The output of all DC/DC changers 2 is jointly parallel to solid-state and becomes
The total input of direct current of depressor array 3, described solid-state transformer array 3 is made up of 3n solid-state transformer unit 4, n's
Numerical value depends on capacity and the line voltage of electricity generation system.The direct-flow input end of 3n described solid-state transformer unit 4 is the most also
Connection, forms the total input of direct current；The ac output end of 3n described solid-state transformer unit 4 according to a n phase, mutually in string
The mode of connection, forms 3 phases, and 3 connect and compose the total outfan of exchange according still further to star-like or angle-style.Described solid-state transformer array
The direct current energy of conveying in parallel for all DC/DC changers 2 is converted to AC energy by 3, by exchanging total outfan and exchanging height
Voltage electric grid is directly connected to.Traditional Industrial Frequency Transformer and wave filter it is no longer necessary between solid-state transformer array 3 and AC network, and
And by DC side parallel modular unit and the number change of AC serial module structure unit, various Large Copacity, high voltage can be met
The demand generated electricity by way of merging two or more grid systems.
As in figure 2 it is shown, described solid-state transformer unit 4 is by low voltage DC/AC changer 41, high frequency transformer 42, high pressure
AC/DC changer 43, high pressure DC/AC changer 44 are constituted.
As in figure 2 it is shown, first the direct-flow input end of described solid-state transformer unit 4 connects the straight of low voltage DC/AC changer 41
Stream input, direct current energy is transformed to the alternating current of high frequency, low voltage DC/AC changer 41 by low voltage DC/AC changer 41
Ac output end be connected with the input of high frequency transformer 42, high frequency transformer 42 carries out isolated variable to high-frequency alternating current, defeated
Going out and be similarly high-frequency alternating current, the outfan of high frequency transformer 42 is connected with the ac input end of high pressure AC/DC changer 43,
High-frequency alternating current is transformed to stable direct current energy, the direct current of high pressure AC/DC changer 43 by high pressure AC/DC changer 43
Outfan is connected with the direct-flow input end of high pressure DC/AC changer 44, and direct current energy is carried out by high pressure DC/AC changer 44
Conversion, forms the alternating current of power frequency, and the ac output end of high pressure DC/AC changer 44 is the exchange of solid-state transformer unit 4
Outfan.Solid-state transformer unit 4 achieves direct current energy to the isolation of industrial frequency AC electric energy, power control, communication, protection merit
Energy.As it is shown on figure 3, high pressure DC/AC changer 44 is internal comprises ac filter inductance, ac filter inductance directly becomes with solid-state
The ac output end of depressor unit 4 is connected.
Described solid-state transformer array 3 and DC/DC changer 2 all uses modularized design, it is simple to produces, install, safeguard.
Claims (7)
1. a high pressure grid-connected photovoltaic system based on solid-state transformer array, it is characterised in that: include photovoltaic array (1),
DC/DC changer (2), solid-state transformer array (3) and AC network；Total m of described photovoltaic array (1), m
For the positive integer more than or equal to 2, the outfan of each photovoltaic array (1) all with the input of a DC/DC changer (2)
Connecting, the outfan of all of DC/DC changer (2) is parallel to the total input of direct current of solid-state transformer array (3) jointly,
The total outfan of exchange of described solid-state transformer array (3) is directly connected with ac high-voltage electrical network.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 1, its feature exists
In: described DC/DC changer (2) uses boost circuit topology, DC/DC changer (2) is independent control and follow the tracks of with
The maximum power point of the photovoltaic array (1) that its input is connected, is used for realizing all photovoltaic arrays (1) and realizes peak power simultaneously.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 1, its feature exists
In: described solid-state transformer array (3) is made up of 3n solid-state transformer unit (4), and n is the most whole more than or equal to 2
Number, the direct-flow input end of 3n described solid-state transformer unit (4) is the most in parallel, forms the total input of direct current；Described
3n solid-state transformer unit (4) is equally divided into 3 groups, the ac output end string of n the solid-state transformer unit (4) often organized
Connection forms a phase, forms 3 phases altogether, and 3 connect and compose the total outfan of exchange according still further to star-like or angle-style.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 3, its feature exists
In: described solid-state transformer unit (4) uses modularized design.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 3, its feature exists
Low voltage DC/AC changer (41) of including being sequentially connected with in: described solid-state transformer unit (4), high frequency transformer (42),
High pressure AC/DC changer (43) and high pressure DC/AC changer (44), the direct current of described solid-state transformer unit (4)
First input connects the direct-flow input end of low voltage DC/AC changer (41), the exchange of low voltage DC/AC changer (41)
Outfan is connected with the input of high frequency transformer (42), the outfan of high frequency transformer (42) and high pressure AC/DC changer
(43) ac input end is connected, the DC output end of high pressure AC/DC changer (43) and high pressure DC/AC changer (44)
Direct-flow input end be connected, the ac output end of high pressure DC/AC changer (44) is the exchange of solid-state transformer unit (4)
Outfan.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 5, its feature exists
In: described low voltage DC/AC changer (41), high pressure AC/DC changer (43) and high pressure DC/AC changer (44)
All use single-phase H-bridge circuit.
A kind of high pressure grid-connected photovoltaic system based on solid-state transformer array the most according to claim 5, its feature exists
In: described high pressure DC/AC changer (44) is internal comprises ac filter inductance, and ac filter inductance is directly and solid-state transformation
The ac output end of device unit (4) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222409.7A CN105846458A (en) | 2016-04-11 | 2016-04-11 | Electronic power transformer array based high voltage photovoltaic grid-connected power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222409.7A CN105846458A (en) | 2016-04-11 | 2016-04-11 | Electronic power transformer array based high voltage photovoltaic grid-connected power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105846458A true CN105846458A (en) | 2016-08-10 |
Family
ID=56598056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610222409.7A Pending CN105846458A (en) | 2016-04-11 | 2016-04-11 | Electronic power transformer array based high voltage photovoltaic grid-connected power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105846458A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124115A (en) * | 2017-06-16 | 2017-09-01 | 特变电工新疆新能源股份有限公司 | A kind of method that solid-state transformer starts |
| CN107317471A (en) * | 2017-06-16 | 2017-11-03 | 特变电工新疆新能源股份有限公司 | A kind of method started suitable for solid-state transformer |
| CN108123484A (en) * | 2016-11-30 | 2018-06-05 | 镇江常畅光伏电子有限公司 | A kind of accumulation energy type photovoltaic grid-connected generating control system |
| CN108134405A (en) * | 2017-12-29 | 2018-06-08 | 特变电工新疆新能源股份有限公司 | A kind of double active bridge circuit modulation strategies suitable for photovoltaic generation application |
| CN108233485A (en) * | 2018-02-09 | 2018-06-29 | 江苏建筑职业技术学院 | A kind of multi-functional charging pile system based on DC solid transformer |
| CN110352553A (en) * | 2017-01-06 | 2019-10-18 | 通用电气公司 | The protection of redundancy for isolated form inverter chunking |
| CN110581657A (en) * | 2019-09-23 | 2019-12-17 | 中国科学院电工研究所 | Photovoltaic high-voltage direct-current series grid-connected system |
| CN110582186A (en) * | 2019-09-23 | 2019-12-17 | 中国科学院电工研究所 | Liquid cooling type photovoltaic high-voltage direct-current series grid-connected system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158212A (en) * | 2014-08-06 | 2014-11-19 | 电子科技大学 | Topological structure of multi-level photovoltaic power generation system and control method of topological structure |
| EP2783444B1 (en) * | 2011-11-25 | 2015-09-30 | Enecsys Limited | Renewable energy power generation systems |
-
2016
- 2016-04-11 CN CN201610222409.7A patent/CN105846458A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2783444B1 (en) * | 2011-11-25 | 2015-09-30 | Enecsys Limited | Renewable energy power generation systems |
| CN104158212A (en) * | 2014-08-06 | 2014-11-19 | 电子科技大学 | Topological structure of multi-level photovoltaic power generation system and control method of topological structure |
Non-Patent Citations (1)
| Title |
|---|
| N.C.FOUREAUX等: "Cascaded multilevel SST medium voltage converter for solar applications", 《2015 9TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND ECCE ASIA》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108123484A (en) * | 2016-11-30 | 2018-06-05 | 镇江常畅光伏电子有限公司 | A kind of accumulation energy type photovoltaic grid-connected generating control system |
| CN110352553A (en) * | 2017-01-06 | 2019-10-18 | 通用电气公司 | The protection of redundancy for isolated form inverter chunking |
| CN107124115A (en) * | 2017-06-16 | 2017-09-01 | 特变电工新疆新能源股份有限公司 | A kind of method that solid-state transformer starts |
| CN107317471A (en) * | 2017-06-16 | 2017-11-03 | 特变电工新疆新能源股份有限公司 | A kind of method started suitable for solid-state transformer |
| CN108134405A (en) * | 2017-12-29 | 2018-06-08 | 特变电工新疆新能源股份有限公司 | A kind of double active bridge circuit modulation strategies suitable for photovoltaic generation application |
| CN108134405B (en) * | 2017-12-29 | 2021-06-25 | 特变电工新疆新能源股份有限公司 | Double-active-bridge circuit modulation method suitable for photovoltaic power generation application |
| CN108233485A (en) * | 2018-02-09 | 2018-06-29 | 江苏建筑职业技术学院 | A kind of multi-functional charging pile system based on DC solid transformer |
| CN110581657A (en) * | 2019-09-23 | 2019-12-17 | 中国科学院电工研究所 | Photovoltaic high-voltage direct-current series grid-connected system |
| CN110582186A (en) * | 2019-09-23 | 2019-12-17 | 中国科学院电工研究所 | Liquid cooling type photovoltaic high-voltage direct-current series grid-connected system |
| CN110581657B (en) * | 2019-09-23 | 2020-11-03 | 中国科学院电工研究所 | Photovoltaic high-voltage direct-current series grid-connected system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105846458A (en) | Electronic power transformer array based high voltage photovoltaic grid-connected power generation system | |
| CN104113082B (en) | A kind of modularity full direct current photovoltaic system and control method thereof | |
| CN204103504U (en) | A kind of grid-connected photovoltaic system based on the access of mesohigh direct current | |
| CN204103503U (en) | A kind of grid-connected photovoltaic system based on the access of mesohigh direct current | |
| CN105226714A (en) | A kind of offshore wind farm direct current converges transmission system and method for designing | |
| CN204578458U (en) | A kind of header box circuit structure and photovoltaic generating system | |
| CN104218609A (en) | Topological structure of photovoltaic power station system based on bipolar direct-current transmission | |
| CN102075096B (en) | Fault tolerance design-based high-power electronic transformer | |
| CN102142688B (en) | Electric power grid connecting system as well as electric power transmission system and method | |
| WO2018162215A1 (en) | A photovoltaic power plant system | |
| CN102013823A (en) | Transformer-free solar inverter topological structure based on MMC | |
| WO2017185223A1 (en) | Multiplexed cascade-type photovoltaic power generation system and photovoltaic power generation apparatus | |
| CN204333981U (en) | A kind of electric power energy collector being applicable to distributed power source | |
| CN104113280A (en) | Serial-connection-type photovoltaic square matrix | |
| CN108448633A (en) | A kind of cascade photovoltaic integrated package controller of suitable different capacity component | |
| CN103618327A (en) | Large power energy storage current transformer and main circuit thereof | |
| CN100395935C (en) | High-power wind power generation interconnection technology | |
| CN105932720A (en) | High-voltage high-capacity energy storage virtual synchronous machine system | |
| CN114223127B (en) | Power supply system | |
| CN105846685A (en) | Cascaded voltage step-up type unidirectional direct current voltage transformer | |
| CN201774475U (en) | Topological structure for transformer-free solar inverter based on MMC | |
| CN209217972U (en) | Photovoltaic combining inverter is pressed in one kind | |
| Razi et al. | Microinverter topology based single-stage grid-connected photovoltaic system: A review | |
| CN204068285U (en) | The hanging photovoltaic combining inverter of a kind of high voltage direct | |
| CN110535172B (en) | Alternating current-direct current wind-solar hybrid power generation system and power smooth control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |