CN103633661A - New energy power generation system and distributed mixing maximum power tracking method - Google Patents
New energy power generation system and distributed mixing maximum power tracking method Download PDFInfo
- Publication number
- CN103633661A CN103633661A CN201210302774.0A CN201210302774A CN103633661A CN 103633661 A CN103633661 A CN 103633661A CN 201210302774 A CN201210302774 A CN 201210302774A CN 103633661 A CN103633661 A CN 103633661A
- Authority
- CN
- China
- Prior art keywords
- converter
- output
- new energy
- generation system
- power
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a new energy power generation system and a distributed mixing maximum power tracking method. When the system operates, a DC-DC converter and a rear-end centralized converter respectively perform MPPT on the output power difference portion of a single new energy power generating device and the output power of a whole new energy power generation system, at the same time, the DC-DC converter can directly merge the power difference portion of the single new energy power generating device into a rear-end DC bus, and through the mutual coordination and cooperation of two MPPT functions, the whole new energy power generation system reaches maximum power output. According to the invention, the maximum power output of each new energy power generating device in the system can be realized, accurate monitoring of output power can be provided, and precision data is provided for system analysis so that the system can adjust control strategies to improve system generating efficiency, and rapid positioning of problematic assemblies is facilitated.
Description
Technical field
The invention belongs to technical field of new energies, relate to solar-energy photo-voltaic cell grid-connected/off-grid system MPPT maximum power point tracking technology, particularly a kind of grid-connected power generation system, and corresponding distributed mixing maximal power tracing system and corresponding tracking.
Background technology
Developing and utilizing the novel energy generation technologies such as solar energy, thermoelectricity is the Important Action of the reply energy and environmental crisis.Because generation of electricity by new energy equipment cost is high and energy conversion efficiency is low, greatly increased cost of electricity-generating, limited the promotion and application of generation of electricity by new energy technology.Take below solar photovoltaic generation system as example illustrates application background of the present invention.
Parallel network power generation is that solar power generation is applied topmost mode, and according to statistics, the whole world is grid-connected application over 90% photovoltaic power generation equipment installed capacity, and this is because the relatively independent photovoltaic system of grid-connected application has the advantages such as cost is low and non-maintaining.Grid-connected photovoltaic system is divided into centralized and distributed two types.Distributed MPPT system can guarantee that each photovoltaic module is operated in maximum power point separately, remove the voltage or the current coupling that when the direct connection in series-parallel of each assembly connects, exist, eliminate between photovoltaic module the inconsistent or environmental condition of characteristic when inconsistent because the energy output that impact causes each other reduces problem, improvement system generating efficiency, improve system reliability high simultaneously, thereby be subject to extensive concern.
Present stage, distributed MPPT system generally accessed photovoltaic module rear end by series system, what each MPPT system was processed is coupled photovoltaic module overall power, institute so that, the caloric value large from loss of each distributed MPPT system greatly, higher, the reliability of cost also declines.
Consider the feature of distributed power generation, its cost is enhanced compared with conventional power generation systems, and therefore the energy output of distributed MPPT system and cost are very crucial problems.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of grid-connected power generation system is provided.This system is by being MPPT to the power output of single generation of electricity by new energy equipment Difference of Output Power part and whole grid-connected power generation system respectively to the centralized converter of DC-DC converter and rear end, DC-DC converter can partly be directly incorporated into back end DC bus by single generation of electricity by new energy plant capacity difference simultaneously, by the mutual cooperation of two kinds of MPPT functions, make whole grid-connected power generation system reach maximum power output.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of grid-connected power generation system, described grid-connected power generation system is by some generation of electricity by new energy equipment, DC-DC converter and a concentrated converter form, wherein, the output of described generation of electricity by new energy equipment is in parallel with the input of DC-DC converter, and the outlet side of some generation of electricity by new energy equipment series connection, form thus DC equipment group string, output in described DC equipment group string after generation of electricity by new energy devices in series forms high voltage dc bus, in described DC equipment group string, the output of DC-DC converter is directly in parallel with back end DC bus, last DC bus is connected with the input of concentrated converter again.
In the preferred embodiment of electricity generation system, described generation of electricity by new energy equipment can be photovoltaic module, thermal cell equipment.
Further, described concentrated converter can be DC-DC converter or combining inverter, when concentrated converter is DC-DC converter, the output of concentrating converter with electric loading or storage battery, be connected, when concentrated converter is combining inverter, concentrate the output of converter to be connected with electrical network.
Further, the straight convertor that described DC-DC converter is booster type, the booster type transformer of non-isolation or the anti exciting converter of isolation.
Further, described grid-connected power generation system comprises several DC equipment group strings and a concentrated converter, and the output of described multi-channel DC equipment group string is connected with the input of concentrated converter, forms grid-connected power generation system.
Based on above-mentioned grid-connected power generation system, the present invention also provides a kind of distributed mixing maximum power tracking method, and the method comprises the steps:
(1), when system is started working, DC-DC converter is MPPT to each generation of electricity by new energy equipment Difference of Output Power respectively;
(3) the centralized converter in rear end is MPPT to whole grid-connected power generation system;
(4) DC-DC converter is directly incorporated into back end DC bus by all generation of electricity by new energy equipment Difference of Output Powers;
(5) when the generating equipment output current of front end new forms of energy is inconsistent, the peak power output of whole grid-connected power generation system is that the centralized converter in rear end is done the power output of MPPT and the summation of all generation of electricity by new energy equipment Difference of Output Power sums to grid-connected power generation system;
(6) when the generating equipment output current of front end new forms of energy is consistent, all generation of electricity by new energy equipment Difference of Output Power sums are zero, and the peak power output of whole grid-connected power generation system is that the centralized converter in rear end is done the power output of MPPT to grid-connected power generation system.
In the preferred version of tracking, when in described step (1), DC-DC converter is partly MPPT to generation of electricity by new energy equipment Difference of Output Power, after DC-DC converter increases voltage, if assembly overall power increases, till voltage continues to be increased to assembly overall power and diminishes; After DC-DC converter reduces voltage, if the increase of assembly overall power, till voltage would continue to be reduced to assembly overall power and diminishes.
The present invention who forms according to such scheme has the following advantages:
(1) distributed maximum power point tracing method of the present invention has high system effectiveness, and extremely low own loss no longer has intrinsic power conversion loss, and the comprehensive conversion efficiency in system full-load range can reach more than 99.5%.On this basis, the system output energy DC-DC converter traditional with application compared, and expectation can improve 3% ~ 5% (this percentage point is determined by the power conversion loss of existing DC-DC converter self) again;
(2) distributed maximum power point tracing method of the present invention has high system reliability, even if DC-DC converter loses efficacy, also can not exert an influence to the operation of system;
(3) distributed maximum power point tracing method of the present invention has low cost, high stability feature, because DC-DC converter is only processed 10% ~ 20% of whole generated output, therefore power section cost significantly reduces, and volume, weight are also reduced greatly;
(4) distributed maximum power point tracing method of the present invention goes for and any existing photovoltaic generating system.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Fig. 1 is grid-connected power generation system schematic diagram of the present invention;
Fig. 2 is the grid-connected power generation system schematic diagram with a plurality of DC equipment group strings;
Symbol description in figure:
101
1-101
n-generation of electricity by new energy equipment; 103-concentrated converter; 104-storage battery, electrical network or other use electric loadings; 102, DC-DC-DC-DC converter; 105-DC bus; 106-DC equipment group string; u
bus-combining inverter direct current input side busbar voltage; p
1, p
2..p
n-generation of electricity by new energy equipment peak power output; i
1, i
2... i
nthe output current at-generation of electricity by new energy equipment maximum power point place; p
bus1-centralized converter is done the peak power output of MPPT to grid-connected power generation system; p
bus2-DC-DC converter is partly done the power output sum of MPPT to n generation of electricity by new energy equipment Difference of Output Power.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1, grid-connected power generation system 100 provided by the invention, by n generation of electricity by new energy equipment 101
1-101
n, a n DC-DC converter 102 and a concentrated converter 103 form, wherein, generation of electricity by new energy equipment 101
1-101
noutput in parallel with the input of DC-DC converter 102, n generation of electricity by new energy equipment 101 simultaneously
1-101
noutlet side series connection, form thus DC equipment group string 106; N generation of electricity by new energy equipment 101 in DC equipment group string 106
1-101
noutput after series connection forms high voltage dc bus 105, in DC equipment group string 106, the output of n DC-DC converter 102 is directly in parallel with back end DC bus 105, last DC bus 105 is connected with the input of concentrated converter 103 again, concentrates the output of converter 103 to connect storage battery, electrical network or other use electric loadings 104.
Wherein, generation of electricity by new energy equipment 101
1-101
ncan be photovoltaic module, thermal cell equipment.
DC-DC converter 102 is for single generation of electricity by new energy equipment Difference of Output Power is partly done to MPPT, and single generation of electricity by new energy equipment Difference of Output Power partly can be directly incorporated into back end DC bus.
In the present invention, DC-DC converter 102 can or be the booster type transformer of non-isolation or is the anti exciting converter of isolation for the straight convertor of booster type.
Referring to Fig. 2, on the basis of such scheme, the present invention also provides further prioritization scheme, in this prioritization scheme, grid-connected power generation system comprises several DC equipment group strings 106 and a concentrated converter 103, the output of multi-channel DC equipment group string is connected with the input of concentrated converter, form grid-connected power generation system, and structure in DC equipment group string 106 with annexation with above-mentioned consistent, do not repeated herein.
Based on such scheme, the present invention also provides a kind of distributed mixing maximum power tracking method, and the grid-connected power generation system 100 of the method based on implementing, as shown in Figure 1, consists of n generation of electricity by new energy equipment, a n DC-DC converter and a centralized converter.
(1) when system is started working, DC-DC converter is MPPT to each generation of electricity by new energy equipment Difference of Output Power respectively, and power output is respectively p
1=i
1* u
1, p
2=i
2* u
2.。。, p
n=i
n* u
n, the Difference of Output Power Δ p of single generation of electricity by new energy equipment
n=p
n-min{i
1, i
2.。。i
n}*u
n；
When in this step, DC-DC converter is partly MPPT to generation of electricity by new energy equipment Difference of Output Power, after DC-DC converter increases voltage, if assembly overall power increases, till voltage continues to be increased to assembly overall power and diminishes; After DC-DC converter reduces voltage, if the increase of assembly overall power, till voltage would continue to be reduced to assembly overall power and diminishes;
(2) the centralized converter in rear end is MPPT to whole grid-connected power generation system, and power output is p
bus1=min{i
1, i
2.。。i
n}*u
bus；
(3) DC-DC converter is by n piece generation of electricity by new energy equipment Difference of Output Power Δ p
1, Δ p
2... Δ p
nbe directly incorporated into back end DC bus, summation is p
bus2=Δ P
1+ Δ p
2+ ... + Δ p
n;
(4) the peak power output p of whole grid-connected power generation system
max=P
bus1+ P
bus2;
(5) when the generating equipment output current of front end new forms of energy is consistent, i.e. i
1=i
2=i
3=...=i
n, Δ p
n=p
n-min{i
1, i
2.。。I
n* u
n=0, the centralized converter in rear end is the power output p of MPPT to grid-connected power generation system
bus1=i
n* u
bus, DC-DC converter is by n piece generation of electricity by new energy equipment Difference of Output Power sum p
bus2=Δ P
1+ Δ p
2+ ... + Δ p
n=0 is directly incorporated into back end DC bus, and the peak power output of whole grid-connected power generation system is p
max=P
bus1+ p
bus2=i
n* u
bus;
(6) when the generating equipment output current of front end new forms of energy is inconsistent, i.e. i
1≠ i
2≠ i
3≠ ... ≠ i
n, Δ p
n=p
n-min{i
1, i
2.。。I
n* u
n≠ 0, the centralized converter in rear end is the power output p of MPPT to grid-connected power generation system
bus1=min{i
1, i
2.。。I
n* u
bus, DC-DC converter is by n piece generation of electricity by new energy equipment Difference of Output Power sum p
bus2=Δ p
1+ Δ p
2+ ... + Δ p
n﹥ 0 is directly incorporated into back end DC bus, the peak power output p of whole grid-connected power generation system
max=P
bus1+ P
bus2=min{i
1, i
2.。。i
n}*u
bus+Δp
1+Δp
2+…+Δp
n；
(7) through the judgement of above step (5) and step (6), no matter whether the output current of front end n generation of electricity by new energy equipment is variant, and whole grid-connected power generation system always can obtain maximum power p
maxoutput.
From such scheme, in the present invention, utilize the centralized converter in DC-DC converter and rear end respectively the power output of single generation of electricity by new energy equipment Difference of Output Power part and whole grid-connected power generation system to be done to MPPT, DC-DC converter can partly be directly incorporated into back end DC bus by single generation of electricity by new energy plant capacity difference simultaneously, by the mutual cooperation of two kinds of MPPT functions, make whole grid-connected power generation system reach maximum power output.
In addition, because DC-DC converter is only MPPT by single generation of electricity by new energy equipment Difference of Output Power part (account for overall power 10% ~ 20%), so its power grade is 10% ~ 20% of generation of electricity by new energy equipment, therefore caloric value is very little, volume weight is also greatly reduced, cost, fundamentally improve the system effectiveness of grid-connected power generation system, reached the object that improves energy output, reduces costs.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. a grid-connected power generation system, described grid-connected power generation system is by some generation of electricity by new energy equipment, some DC-DC converters and a concentrated converter form, it is characterized in that, the output of described generation of electricity by new energy equipment is in parallel with the input of DC-DC converter, and the outlet side of some generation of electricity by new energy equipment series connection, form thus DC equipment group string, output in described DC equipment group string after generation of electricity by new energy devices in series forms high voltage dc bus, in DC equipment group string, the output of DC-DC converter is directly in parallel with back end DC bus, last DC bus is connected with the input of concentrated converter again.
2. a kind of grid-connected power generation system according to claim 1, is characterized in that, described generation of electricity by new energy equipment can be photovoltaic module, thermal cell equipment.
3. a kind of grid-connected power generation system according to claim 1, it is characterized in that, described concentrated converter can be DC-DC converter or combining inverter, when concentrated converter is DC-DC converter, the output of concentrating converter with electric loading or storage battery, be connected, when concentrated converter is combining inverter, concentrate the output of converter to be connected with electrical network.
4. a kind of grid-connected power generation system according to claim 1, is characterized in that, the straight convertor that described DC-DC converter is booster type, the booster type transformer of non-isolation or the anti exciting converter of isolation.
5. a kind of grid-connected power generation system according to claim 1, it is characterized in that, described grid-connected power generation system comprises several DC equipment group strings and a concentrated converter, the output of described multi-channel DC equipment group string is connected with the input of concentrated converter, forms grid-connected power generation system.
6. a distributed mixing maximum power tracking method, is characterized in that, described method comprises the steps:
(1), when system is started working, DC-DC converter is MPPT to each generation of electricity by new energy equipment Difference of Output Power respectively;
(3) the centralized converter in rear end is MPPT to whole grid-connected power generation system;
(4) DC-DC converter is directly incorporated into back end DC bus by all generation of electricity by new energy equipment Difference of Output Powers;
(5) when the generating equipment output current of front end new forms of energy is inconsistent, the peak power output of whole grid-connected power generation system is that the centralized converter in rear end is done the power output of MPPT and the summation of all generation of electricity by new energy equipment Difference of Output Power sums to grid-connected power generation system;
(6) when the generating equipment output current of front end new forms of energy is consistent, all generation of electricity by new energy equipment Difference of Output Power sums are zero, and the peak power output of whole grid-connected power generation system is that the centralized converter in rear end is done the power output of MPPT to grid-connected power generation system.
7. a kind of distributed mixing maximum power tracking method according to claim 6, it is characterized in that, when in described step (1), DC-DC converter is partly MPPT to generation of electricity by new energy equipment Difference of Output Power, after DC-DC converter increases voltage, if assembly overall power increases, till voltage continues to be increased to assembly overall power and diminishes; After DC-DC converter reduces voltage, if the increase of assembly overall power, till voltage would continue to be reduced to assembly overall power and diminishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302774.0A CN103633661A (en) | 2012-08-23 | 2012-08-23 | New energy power generation system and distributed mixing maximum power tracking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210302774.0A CN103633661A (en) | 2012-08-23 | 2012-08-23 | New energy power generation system and distributed mixing maximum power tracking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103633661A true CN103633661A (en) | 2014-03-12 |
Family
ID=50214407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210302774.0A Pending CN103633661A (en) | 2012-08-23 | 2012-08-23 | New energy power generation system and distributed mixing maximum power tracking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103633661A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104325A (en) * | 2014-08-05 | 2014-10-15 | 阳光电源股份有限公司 | Method and system for controlling series photovoltaic inverter |
| CN104113073A (en) * | 2013-04-17 | 2014-10-22 | 上海康威特吉能源技术有限公司 | New energy power generation system and distributed mixing maximum power tracking method |
| CN104615188A (en) * | 2014-12-31 | 2015-05-13 | 上海康威特吉能源技术有限公司 | Photovoltaic optimization system and control method thereof |
| WO2016008093A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Centralized mppt exiting and switching method and application thereof |
| CN105827180A (en) * | 2016-05-24 | 2016-08-03 | 西交利物浦大学 | Distributed photovoltaic system based on Beta parameter difference power control |
| CN106287549A (en) * | 2016-10-09 | 2017-01-04 | 中山市宏浦光电科技有限公司 | A kind of thermo-electric generation energy-saving converter |
| CN106329513A (en) * | 2016-08-31 | 2017-01-11 | 北京交通大学 | Topology structure of photovoltaic panel independent MPPT (Maximum Power Point Tracking) control |
| CN107919680A (en) * | 2017-11-10 | 2018-04-17 | 四川大学 | The control method of quasi- Z source class connection inverter system based on modular power difference |
| CN108321836A (en) * | 2017-01-18 | 2018-07-24 | 无锡美凯能源科技有限公司 | A kind of topological structure that multigroup single-phase inversion unit is grid-connected |
| CN110582919A (en) * | 2017-05-05 | 2019-12-17 | 昕诺飞控股有限公司 | Power conversion system and method |
| CN112290543A (en) * | 2020-10-20 | 2021-01-29 | 国网江苏省电力有限公司营销服务中心 | Method and system for identifying weak points of energy utilization efficiency of energy interconnection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100295377A1 (en) * | 2009-05-20 | 2010-11-25 | General Electric Company | Power generator distributed inverter |
| CN101953060A (en) * | 2006-12-06 | 2011-01-19 | 太阳能安吉科技 | Distributed power harvesting systems using DC power sources |
| CN102185532A (en) * | 2011-05-16 | 2011-09-14 | 武汉纺织大学 | Grid-connected and off-grid hybrid solar energy photovoltaic generating system |
| US20120091800A1 (en) * | 2011-10-28 | 2012-04-19 | The Board Of Trustees Of The University Of Illinois | System and Method for Optimizing Solar Power Conversion |
| CN103633662A (en) * | 2012-08-23 | 2014-03-12 | 上海康威特吉能源技术有限公司 | Distributed new energy power generation system and distributed mixing maximum power tracking method |
-
2012
- 2012-08-23 CN CN201210302774.0A patent/CN103633661A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953060A (en) * | 2006-12-06 | 2011-01-19 | 太阳能安吉科技 | Distributed power harvesting systems using DC power sources |
| US20100295377A1 (en) * | 2009-05-20 | 2010-11-25 | General Electric Company | Power generator distributed inverter |
| CN102185532A (en) * | 2011-05-16 | 2011-09-14 | 武汉纺织大学 | Grid-connected and off-grid hybrid solar energy photovoltaic generating system |
| US20120091800A1 (en) * | 2011-10-28 | 2012-04-19 | The Board Of Trustees Of The University Of Illinois | System and Method for Optimizing Solar Power Conversion |
| CN103633662A (en) * | 2012-08-23 | 2014-03-12 | 上海康威特吉能源技术有限公司 | Distributed new energy power generation system and distributed mixing maximum power tracking method |
Non-Patent Citations (1)
| Title |
|---|
| 吴红飞等: "高效率高增益Boost_Flyback直流变换器", 《中国电机工程学报》, vol. 31, no. 24, 25 August 2011 (2011-08-25), pages 40 - 45 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113073A (en) * | 2013-04-17 | 2014-10-22 | 上海康威特吉能源技术有限公司 | New energy power generation system and distributed mixing maximum power tracking method |
| WO2016008093A1 (en) * | 2014-07-15 | 2016-01-21 | 阳光电源股份有限公司 | Centralized mppt exiting and switching method and application thereof |
| US10693297B2 (en) | 2014-07-15 | 2020-06-23 | Sungrow Power Supply Co., Ltd. | Centralized MPPT exiting and switching method and application thereof |
| CN104104325A (en) * | 2014-08-05 | 2014-10-15 | 阳光电源股份有限公司 | Method and system for controlling series photovoltaic inverter |
| CN104615188A (en) * | 2014-12-31 | 2015-05-13 | 上海康威特吉能源技术有限公司 | Photovoltaic optimization system and control method thereof |
| CN105827180A (en) * | 2016-05-24 | 2016-08-03 | 西交利物浦大学 | Distributed photovoltaic system based on Beta parameter difference power control |
| CN106329513A (en) * | 2016-08-31 | 2017-01-11 | 北京交通大学 | Topology structure of photovoltaic panel independent MPPT (Maximum Power Point Tracking) control |
| CN106287549A (en) * | 2016-10-09 | 2017-01-04 | 中山市宏浦光电科技有限公司 | A kind of thermo-electric generation energy-saving converter |
| CN108321836A (en) * | 2017-01-18 | 2018-07-24 | 无锡美凯能源科技有限公司 | A kind of topological structure that multigroup single-phase inversion unit is grid-connected |
| CN110582919A (en) * | 2017-05-05 | 2019-12-17 | 昕诺飞控股有限公司 | Power conversion system and method |
| CN107919680A (en) * | 2017-11-10 | 2018-04-17 | 四川大学 | The control method of quasi- Z source class connection inverter system based on modular power difference |
| CN107919680B (en) * | 2017-11-10 | 2021-01-22 | 四川大学 | Control method of quasi-Z source cascade inverter system based on module power difference |
| CN112290543A (en) * | 2020-10-20 | 2021-01-29 | 国网江苏省电力有限公司营销服务中心 | Method and system for identifying weak points of energy utilization efficiency of energy interconnection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103633661A (en) | New energy power generation system and distributed mixing maximum power tracking method | |
| CN103166239B (en) | Centralized-distributed mixed novel energy power generation system and maximum power point tracking control method | |
| CN101710716A (en) | Grid-connected inverter capable of reducing electrolytic capacitance | |
| CN104113073A (en) | New energy power generation system and distributed mixing maximum power tracking method | |
| CN201194333Y (en) | Solar photovoltaic parallel-in system | |
| CN201550052U (en) | Solar power supply system | |
| CN102624022A (en) | Photovoltaic grid-connected power generation system and direct current bus voltage control method thereof | |
| CN103633662A (en) | Distributed new energy power generation system and distributed mixing maximum power tracking method | |
| CN103904638A (en) | Direct-current distributed load system based on three-port converter and control method thereof | |
| CN102856969A (en) | Solar photovoltaic power generation system | |
| CN204794878U (en) | Current sample photovoltaic power generation system | |
| US8525369B2 (en) | Method and device for optimizing the use of solar electrical power | |
| CN103075330A (en) | New technique for improving efficiency of photovoltaic water pump system | |
| CN102522810A (en) | Solar energy and utility power complementary power supply control system | |
| CN204497847U (en) | Photovoltaic plant monitoring management system | |
| CN102969707B (en) | Series distributed novel energy power generation system and control method thereof | |
| CN202797636U (en) | Photovoltaic direct current power distribution cabinet adopting Boost circuits | |
| CN104467019A (en) | Microgrid system used for sea island power supply | |
| CN102646977B (en) | Secondary booster circuit for boosting voltage based on MPPT (maximum power point tracking) and distributed solar battery pack | |
| CN202513586U (en) | Intelligent micro-grid using renewable energy for generating power | |
| CN201805380U (en) | Alternating-current output intelligent control junction box for solar cell component | |
| CN202135082U (en) | Solar cell panel circuit | |
| CN101572512A (en) | Ant colony parallel photovoltaic generating system | |
| CN202997941U (en) | Novel photovoltaic power generation system of energy-feedback power unit | |
| CN203537052U (en) | Multifunctional renewable energy source converting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 201203 Building 5, building 200, Newton Road, Zhangjiang hi tech park, Shanghai, Pudong New Area, 2 Applicant after: Shanghai Convertergy Energy Technology Co., Ltd. Address before: 200090 Shanghai city Yangpu District Yangshupu Road No. 2300 Building 5 room 5012 A Applicant before: Shanghai Convertergy Energy Technology Co., Ltd. |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140312 |