CN102097964A - Photovoltaic grid-connected inverter - Google Patents
Photovoltaic grid-connected inverter Download PDFInfo
- Publication number
- CN102097964A CN102097964A CN2011100606840A CN201110060684A CN102097964A CN 102097964 A CN102097964 A CN 102097964A CN 2011100606840 A CN2011100606840 A CN 2011100606840A CN 201110060684 A CN201110060684 A CN 201110060684A CN 102097964 A CN102097964 A CN 102097964A
- Authority
- CN
- China
- Prior art keywords
- inverter
- photovoltaic
- circuit breaker
- detection module
- inversion
- 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
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a photovoltaic grid-connected inverter, which comprises an inversion unit and a control unit and mainly solves the problem that the traditional photovoltaic grid-connected inverter has large grid-connected current harmonic quantity and low reliability and severely influences the electric energy quality of a power grid. A touch screen with an operating menu is adopted and has multi-window operating function, multipage data can be displayed in the same screen and displayable information quantity is greatly increased; the inverter has unique graphical display function, dynamic operating data of the inverter can be received in real time, a curve chart is drawn, the dynamic operating data of the inverter is displayed, the data is convenient to observe, analyze and process, and the photovoltaic inverter can be really monitored in real time; due to the adoption of an alternating current active filter, the current harmonic content is greatly reduced; and by taking a vacuum frame circuit breaker as a grid-connected component, the control is simpler and more reliable. The inverter is easy and convenient to operate, can effectively realize synchronous operation of a plurality of connected inversion units, and reduces the construction cost and operating cost of a large photovoltaic power station.
Description
Technical field
The present invention relates to a kind of inverter, specifically a kind ofly be used for the photovoltaic combining inverter that solar power generation and electrical network are incorporated into the power networks.
Background technology
In the photovoltaic application of solar energy, parallel network power generation is the important development trend that photovoltaic is used, and has become the principal mode of photovoltaic application.At present, existing photovoltaic combining inverter mostly is the small-power device, with photovoltaic conflux output direct current filtering after overcurrent vreaker carries out the DC/AC conversion, carry out again being connected to the grid by AC circuit breaker behind the ac filter, the current harmonics amount that is incorporated into the power networks like this is big, poor reliability has a strong impact on the electrical network quality of power supply.
Summary of the invention
For overcoming the deficiency that above-mentioned prior art exists, technical problem to be solved by this invention is to provide a kind of photovoltaic combining inverter, and it has not only improved energy conversion efficiency, and stable and reliable operation.
The present invention solves the technical scheme that its technical problem takes: photovoltaic combining inverter, comprise inversion unit and control unit, described inversion unit comprises fuse, DC filter, dc circuit breaker, inversion module, alternating current active filter, first voltage detection module and AC circuit breaker, it is characterized in that described control unit comprises PLC, second voltage detection module and display module; Described fuse one end connects the photovoltaic DC input, the other end connects DC filter, described DC filter is connected with the input of inversion module through dc circuit breaker, and the output of described inversion module inserts electrical network through alternating current active filter, first voltage detection module and AC circuit breaker; Described PLC is connected with display module with inversion unit, second voltage detection module respectively, and described second voltage detection module is arranged on the grid side that is incorporated into the power networks.
Described AC circuit breaker adopts the vacuum frame circuit breaker, adds the circuit breaker mode in order to replace conventional contactor.
Described display module comprises the touch-screen that has actions menu.
Further, also comprise the D.C. isolation detection module, described D.C. isolation detection module is arranged between fuse and the DC filter.
Further, also comprise the direct current Surge Protector and exchange Surge Protector that described direct current Surge Protector is arranged on the DC side of inversion unit, described interchange Surge Protector is arranged on the AC side of inversion unit.
The invention has the beneficial effects as follows, adopted the touch-screen that has actions menu, have the function of many window-operatings, can in same screen, show the multipage data, but increase the display message amount greatly; Function with unique graphical display can receive the dynamic operation data of inverter in real time, and curve plotting figure, shows the dynamic operation data of inverter, is convenient to observation, analysis, deal with data, accomplishes the real-time monitoring to photovoltaic DC-to-AC converter veritably; Adopt the alternating current active filter in AC side, reduce current harmonic content greatly; AC side directly adopts the vacuum frame circuit breaker to replace the mode that traditional lv contactor adds low-voltage circuit breaker as the device that is incorporated into the power networks, and control is simple more, reliable; The present invention is not only simple to operate, convenient, and can effectively realize a plurality of inversion unit networking synchronous operations, reduces the construction cost and the operating cost in large-sized photovoltaic power station.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing:
Fig. 1 is a system principle diagram of the present invention;
Wherein, 1 fuse, 2 DC filter, 3 dc circuit breakers, 4 inversion modules, 5 alternating current active filters, 6 AC circuit breaker, 7 first voltage detection module, 8 second voltage detection module, 9PLC, 10 touch-screens, 11 D.C. isolation detection modules, 12 direct current Surge Protectors, 13 exchange Surge Protector.
Embodiment
As shown in Figure 1; photovoltaic combining inverter comprises two fuses 1, DC filter 2, dc circuit breaker 3, inversion module 4, alternating current active filter 5, AC circuit breaker 6, first voltage detection module 7, second voltage detection module 8, PLC 9, touch-screen 10, D.C. isolation detection module 11, direct current Surge Protector 12, exchanges Surge Protector 13.The positive and negative direct current of photovoltaic header box is fuse 1, D.C. isolation detection module 11, DC filter 2 and the dc circuit breaker 3 through being connected with photovoltaic header box both positive and negative polarity lead-out terminal successively, be connected with the input of inversion module 4,4 pairs of direct currents of described inversion module carry out being connected to the grid with second voltage detection module 8 and by L1, L2 and the L3 binding post that is connected electrical network through alternating current active filter 5, first voltage detection module 7, AC circuit breaker 6 after the DC/AC conversion again; Described PLC 9 is connected with touch-screen 10 with inversion unit, second voltage detection module 8 respectively.
The AC side of 7 pairs of inverters of described first voltage detection module is carried out real-time voltage and is detected, and the relevant information that detects is sent to PLC 9; The be incorporated into the power networks AC side of electrical network of described second voltage detection module 8 is carried out real-time voltage and is detected, and the relevant information that detects is sent to PLC 9; Described PLC compares the information of voltage of the inverter AC side that receives and the information of voltage of the electrical network AC side that is incorporated into the power networks, and when satisfying the condition of generating electricity by way of merging two or more grid systems, and whether photovoltaic array when having enough energy, and photovoltaic combining inverter can be realized the auto-parallel generating.
Described PLC 9 sends to touch-screen 10 with relevant information and receives the instruction that touch-screen sends, and carries out associative operation according to the instruction that receives.Can check the operation information of photovoltaic DC-to-AC converter by touch-screen, and realize the control operation, show real-time running data, show fault message, adjust operational factor, check function such as historical record.
Described D.C. isolation detection module carries out real time monitoring to the photovoltaic cell component state, thereby fault is located fast.
Photovoltaic combining inverter has self-protection function; comprised/low-voltage and mistake/low-frequency protection and anti-isolated island protection strategy; the mode that anti-isolated island protection strategy adopts passive detection to combine with active detecting, can effectively prevent inverter under the situation of grid power blackout to mains supply.Control system adopts Redundancy Design, has greatly improved system reliability.
The process that photovoltaic combining inverter generates electricity by way of merging two or more grid systems is automatic, need not artificial interference or control.Photovoltaic combining inverter detects the AC side electrical network automatically and whether satisfies the condition of generating electricity by way of merging two or more grid systems, and whether simultaneously also detect photovoltaic array has enough energy.When condition satisfied, photovoltaic combining inverter can be realized the auto-parallel generating.
In the process of generating electricity by way of merging two or more grid systems, photovoltaic combining inverter can make the energy of photovoltaic array output reach maximum in MPPT maximum power point tracking (MPPT) mode always.
And the network process key step is as follows:
1, the direct-flow input end of photovoltaic combining inverter connects the direct current input of header box or direct current cabinet, and output is connected to the electrical network AC side;
2, closed DC side circuit breaker, photovoltaic combining inverter enters " in the startup " state;
3, the interchange outlet side voltage when photovoltaic combining inverter reaches 330V and keeps certain hour, and photovoltaic combining inverter is prepared to be incorporated into the power networks;
4, the detection before photovoltaic combining inverter is incorporated into the power networks after confirming to satisfy the condition that is incorporated into the power networks, begins to connect electrical network, and then generates electricity by way of merging two or more grid systems.
When electrical network occurs when unusual, photovoltaic combining inverter can disconnect with electrical network at once, and enters relevant defence program.
Claims (5)
1. photovoltaic combining inverter, comprise inversion unit and control unit, described inversion unit comprises fuse, DC filter, dc circuit breaker, inversion module, alternating current active filter, first voltage detection module and AC circuit breaker, it is characterized in that described control unit comprises PLC, second voltage detection module and display module; Described fuse one end connects the photovoltaic DC input, the other end connects DC filter, described DC filter is connected with the input of inversion module through dc circuit breaker, and the output of described inversion module inserts electrical network through alternating current active filter, first voltage detection module and AC circuit breaker; Described PLC is connected with display module with inversion unit, second voltage detection module respectively, and described second voltage detection module is arranged on the grid side that is incorporated into the power networks.
2. photovoltaic combining inverter according to claim 1 is characterized in that, described AC circuit breaker adopts the vacuum frame circuit breaker.
3. photovoltaic combining inverter according to claim 1 is characterized in that described display module comprises the touch-screen that has actions menu.
4. according to each described photovoltaic combining inverter of claim 1 to 3, it is characterized in that also comprise the D.C. isolation detection module, described D.C. isolation detection module is arranged between fuse and the DC filter.
5. photovoltaic combining inverter according to claim 4; it is characterized in that; also comprise the direct current Surge Protector and exchange Surge Protector, described direct current Surge Protector is arranged on the DC side of inversion unit, and described interchange Surge Protector is arranged on the AC side of inversion unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100606840A CN102097964A (en) | 2011-03-14 | 2011-03-14 | Photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100606840A CN102097964A (en) | 2011-03-14 | 2011-03-14 | Photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102097964A true CN102097964A (en) | 2011-06-15 |
Family
ID=44130867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100606840A Pending CN102097964A (en) | 2011-03-14 | 2011-03-14 | Photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102097964A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606960A (en) * | 2013-12-12 | 2014-02-26 | 国网上海市电力公司 | Distributed photovoltaic power station/power distribution station 380V bus grid-integration structure |
| CN104506060A (en) * | 2014-11-12 | 2015-04-08 | 宁波中博电器有限公司 | Parallel-mode inverter |
| CN105099362A (en) * | 2014-05-14 | 2015-11-25 | 北京圣兆科技开发有限公司 | Solar photovoltaic electric power intelligent system |
| CN105591294A (en) * | 2016-02-29 | 2016-05-18 | 国网山东省电力公司郓城县供电公司 | Distributed type power supply grid-connected power distribution cabinet |
| CN105811465A (en) * | 2016-05-17 | 2016-07-27 | 湖北武汉交投职工技协服务部 | Photovoltaic grid-connected system |
| CN104506060B (en) * | 2014-11-12 | 2017-01-04 | 宁波中博电器有限公司 | A kind of also machine inverter |
| CN108155874A (en) * | 2018-01-17 | 2018-06-12 | 江阴市余润光伏发电有限公司 | A kind of photovoltaic power station monitoring system |
| CN109066979A (en) * | 2018-08-17 | 2018-12-21 | 国网江苏省电力有限公司盐城供电分公司 | A kind of utility power quality control system based on solar power generation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893214A (en) * | 2005-07-05 | 2007-01-10 | 沈阳网格电子信息技术有限公司 | Low-voltage photovotaic parallel-in control device |
| CN101017982A (en) * | 2007-03-12 | 2007-08-15 | 刘建政 | Light voltage and wind power integrated networking device with the reactive power compensation and harmonious administration function |
| CN101141112A (en) * | 2007-10-16 | 2008-03-12 | 谢步明 | Common DC bus based multi-frequency converter system for vessel |
| CN201726350U (en) * | 2010-07-28 | 2011-01-26 | 北京长宇联讯通信技术有限公司 | Prefabricated photovoltaic distribution box |
| CN201947192U (en) * | 2011-03-14 | 2011-08-24 | 山东鲁冶瑞宝电气自动化有限公司 | Photovoltaic grid inverter |
-
2011
- 2011-03-14 CN CN2011100606840A patent/CN102097964A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893214A (en) * | 2005-07-05 | 2007-01-10 | 沈阳网格电子信息技术有限公司 | Low-voltage photovotaic parallel-in control device |
| CN101017982A (en) * | 2007-03-12 | 2007-08-15 | 刘建政 | Light voltage and wind power integrated networking device with the reactive power compensation and harmonious administration function |
| CN101141112A (en) * | 2007-10-16 | 2008-03-12 | 谢步明 | Common DC bus based multi-frequency converter system for vessel |
| CN201726350U (en) * | 2010-07-28 | 2011-01-26 | 北京长宇联讯通信技术有限公司 | Prefabricated photovoltaic distribution box |
| CN201947192U (en) * | 2011-03-14 | 2011-08-24 | 山东鲁冶瑞宝电气自动化有限公司 | Photovoltaic grid inverter |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606960A (en) * | 2013-12-12 | 2014-02-26 | 国网上海市电力公司 | Distributed photovoltaic power station/power distribution station 380V bus grid-integration structure |
| CN105099362A (en) * | 2014-05-14 | 2015-11-25 | 北京圣兆科技开发有限公司 | Solar photovoltaic electric power intelligent system |
| CN104506060A (en) * | 2014-11-12 | 2015-04-08 | 宁波中博电器有限公司 | Parallel-mode inverter |
| CN104506060B (en) * | 2014-11-12 | 2017-01-04 | 宁波中博电器有限公司 | A kind of also machine inverter |
| CN105591294A (en) * | 2016-02-29 | 2016-05-18 | 国网山东省电力公司郓城县供电公司 | Distributed type power supply grid-connected power distribution cabinet |
| CN105811465A (en) * | 2016-05-17 | 2016-07-27 | 湖北武汉交投职工技协服务部 | Photovoltaic grid-connected system |
| CN105811465B (en) * | 2016-05-17 | 2019-04-26 | 湖北武汉交投职工技协服务部 | Photovoltaic parallel in system |
| CN108155874A (en) * | 2018-01-17 | 2018-06-12 | 江阴市余润光伏发电有限公司 | A kind of photovoltaic power station monitoring system |
| CN109066979A (en) * | 2018-08-17 | 2018-12-21 | 国网江苏省电力有限公司盐城供电分公司 | A kind of utility power quality control system based on solar power generation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104065157B (en) | Uninterruptible power supply with improved power supply reliability | |
| CN102624018B (en) | Distributed hybrid power supply intelligent grid system and control method | |
| Farhoodnea et al. | Power quality impacts of high-penetration electric vehicle stations and renewable energy-based generators on power distribution systems | |
| CN102097964A (en) | Photovoltaic grid-connected inverter | |
| CN103140765A (en) | Failure detecting apparatus | |
| CN205544327U (en) | Direct current steps up and concentrates contravariant photovoltaic power generation system | |
| CN206164112U (en) | A attenuating device is inductiond to anti current potential for photovoltaic power generation system | |
| CN103280826A (en) | Inverter grid connection security detection method and inverter grid connection circuit | |
| CN102170142A (en) | Low-voltage ride-through method for photovoltaic inverter | |
| CN103091604A (en) | Island detection method and detection device for grid-connected photovoltaic power generation system | |
| CN201789441U (en) | Preinstalled type photovoltaic substation box | |
| CN201726350U (en) | Prefabricated photovoltaic distribution box | |
| CN203054118U (en) | Short-circuit protection test apparatus for IGBT power unit | |
| CN208862564U (en) | A kind of photovoltaic DC-to-AC converter lightning protection device | |
| CN103560523A (en) | Photovoltaic generator set low-voltage ride-through supporting system based on DVR | |
| CN202977458U (en) | Intelligent PV (photovoltaic) convergence box | |
| CN106385052B (en) | A kind of photovoltaic inverting system | |
| CN202330646U (en) | Grid-connected switch state detecting system of three-phase grid-connected inverter | |
| CN201947192U (en) | Photovoltaic grid inverter | |
| CN209593003U (en) | A kind of double-feed current transformer and power electronic equipment | |
| CN208028772U (en) | A kind of high-power converter soft starting circuit | |
| CN110768626A (en) | Circuit conversion structure in PID recovery device of solar power station | |
| CN216215926U (en) | Distributed photovoltaic power generation system | |
| CN202840496U (en) | Wind electricity grid relay protection device | |
| CN114285371A (en) | High-reliability intelligent monitoring communication combiner box and method for photovoltaic power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110615 |