CN102882227B - High-power photovoltaic grid-connected inverter - Google Patents
High-power photovoltaic grid-connected inverter Download PDFInfo
- Publication number
- CN102882227B CN102882227B CN201210339476.9A CN201210339476A CN102882227B CN 102882227 B CN102882227 B CN 102882227B CN 201210339476 A CN201210339476 A CN 201210339476A CN 102882227 B CN102882227 B CN 102882227B
- Authority
- CN
- China
- Prior art keywords
- direct current
- voltage
- switch
- module
- combining inverter
- 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.)
- Active
Links
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)
Abstract
The invention discloses a high-power photovoltaic grid-connected inverter, which comprises a plurality of pieces of direct current input, a plurality of inversion units, a convergent busbar and an alternating current circuit breaker, wherein the inversion units correspond to the direct current input one to one; each inversion unit comprises a direct current filtering module for filtering the corresponding direct current input, a booster module for boosting direct current voltage output by the direct current filtering module, an inversion module for converting the boosted direct current voltage into alternating current voltage, an alternating current filtering unit for filtering the boosted alternating current voltage, and a maximum power point tracking (MPPT) controller for controlling the corresponding booster module and the corresponding inversion module to endow the corresponding direct current input with optimal working voltage; the convergent busbar converges the alternating current voltage output by the inversion units; and the alternating current circuit breaker is arranged between the convergent busbar and a power grid.
Description
Technical field
a kind of high-power photovoltaic combining inverter is relate in the present invention.
Background technology
tradition and apply more 100kw photovoltaic DC-to-AC converter and adopt single-stage integral type framework in the market, the former figure of its work as shown in Figure 1.This framework inverter generally only has a road MPPT controller, occurs that shade blocks, monoblock battery plate lost efficacy or local ageing decay, can affect the power output of integral battery door plate array, significantly reduce systems generate electricity efficiency once panel array; In conventional architectures, DC side is not boosted link, and input voltage range is narrow, can not work under low pressure, also can reduce the utilance of panel array; Because be global monopolis formula, once any one key components and parts breaks down, complete machine will be shut down, and waits to be repaired, and site examining and repairing requires higher to maintainer, and process is complicated, and maintenance time is long, affects the power benefit of photovoltaic plant.
Summary of the invention
the invention provides a kind of high-power photovoltaic combining inverter, the risk that its generating efficiency declines to a great extent is little, can on-line maintenance when part breaks down.
the invention discloses a kind of high-power photovoltaic combining inverter, it comprises: multiple direct current input; Multiple inversion unit, one of them inversion unit inputs phase one_to_one corresponding with a direct current, each inversion unit comprises: DC filtering module, for carrying out filtering, boost module, for being boosted by the direct voltage exported from DC filtering module to direct current input, inversion module, for changing direct voltage after boosting into alternating voltage, ac filter unit, for the alternating voltage after boosting is carried out filtering; MPPT controller, makes the input of each direct current have best operating voltage for controlling boost module and inversion module; Conflux busbar, the alternating voltage exported gathered from multiple inversion unit; AC circuit breaker, is arranged on and confluxes between busbar and electrical network.
preferably, between multiple described direct current inputs and described inversion unit, direct current anti-misconnection monitoring means is provided with.
preferably, described direct current anti-misconnection monitoring means comprises the first via parallel with one another and the second tunnel, the described first via is provided with the Zener diode of series connection mutually, indicating device and a conducting direction and punctures the contrary backward diode in direction with Zener diode, described second tunnel is provided with bypass resistance.
preferably, the output of multichannel primary voltage is provided with a circuit breaker, this circuit breaker has a way control switch corresponding with arbitrary road of described multichannel primary voltage.
preferably, it also comprises the electromagnetic interface filter being arranged on and confluxing between busbar and AC circuit breaker.
preferably, it also comprises the isolating transformer being arranged on and confluxing between busbar and electromagnetic interface filter.
preferably, it also comprises the lightning protection device being arranged in parallel and inputting at each direct current.
preferably, it also comprises the earth protective device be arranged between AC circuit breaker and electrical network.
preferably, described earth protective device comprises photovoltaic fuse, master cpu, leakage current sensor, leakage current sampling modulate circuit, ground connection cut-off switch; Described ground connection cut-off switch, described electricity leakage sensor and described photovoltaic fuse are in series ground connection; Described ground connection cut-off switch and described leakage current sensor are connected with described master cpu, for gathering leakage current signal and passing to the process of leakage current sampling modulate circuit by leakage current modulate circuit of sampling; Described master cpu is connected with described ground connection cut-off switch, controls the folding of ground connection cut-off switch for the leakage current signal after receiving the process of leakage current sample circuit.
preferably, it also comprises a cell panel, and described panel array is divided into the input of multiple direct current.
the present invention adopts above structure, has the following advantages:
1, owing to there being the input of many group direct currents, often organize Dou You mono-tunnel independently MPPT controller, so any riches all the way raw blocks, lost efficacy or aging decay, only can affect the power stage of the cell plate group string on this road, and the normal output on other roads can not be affected, thus the risk that systems generate electricity efficiency declines to a great extent is dropped to minimum;
2, owing to there being the input of many group direct currents, wide input voltage can increase photovoltaic DC-to-AC converter operating voltage range, improves systems generate electricity amount, improves power station returns of investment, and can adapt to more application scenario;
3, owing to there being the input of many group direct currents, when wherein break down in a road, under non-stop-machine situation, power generation loss can be reduced for client to Fast-Maintenance, not even shutdown maintenance, for enterprise reduces;
4, be provided with direct current anti-misconnection monitoring means to prevent the misconnection of many group direct current incoming lines, avoid answering misconnection and the infringement that causes.
Accompanying drawing explanation
accompanying drawing 1 is high-power photovoltaic combining inverter of the prior art.
accompanying drawing 2 is the structural principle schematic diagram of first embodiment of the invention.
accompanying drawing 3 is the structural principle schematic diagram of second embodiment of the invention.
accompanying drawing 4 is the structural principle schematic diagram of the 3rd execution mode in the present invention.
accompanying drawing 5 is the structural principle schematic diagram of four embodiment of the invention.
accompanying drawing 6 is the structural principle schematic diagram in the present invention in inversion unit.
accompanying drawing 7 is that in the present invention, direct current anti-misconnection monitoring means is arranged on the structural representation on inverter.
accompanying drawing 8 is direct current anti-misconnection monitoring means internal structure schematic diagram in the present invention.
accompanying drawing 9 is the structural principle schematic diagram of earth protective device in the present invention.
in accompanying drawing: 11, inversion unit; 12, master cpu; 13, leakage current sampling modulate circuit; 14, ground connection cut-off switch; 15, leakage current sensor; 16, photovoltaic fuse; 17, film battery assembly; 18, electrical network; 20, DC switch; 21, alternating-current switch.
Embodiment
below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
as shown in Figure 1, the first embodiment of the present invention, a kind of high-power photovoltaic combining inverter, it comprises the input of multiple direct current, direct current anti-misconnection monitoring means, multiple inversion unit, the busbar that confluxes, AC circuit breaker.
multiple direct current input is formed by panel array.In this patent, 100kW inverter framework has five road direct current inputs, and a road exchanges and exports.
direct current anti-misconnection monitoring means is arranged between the input of multiple direct current and inversion unit, and the analog quantity directly or indirectly exported by each testing circuit or amount of logic judge the wiring correctness of end of incoming cables.
direct current anti-misconnection monitoring means can detect direct current primary voltage, and Qian Xianduige road voltage of starting shooting after wiring carries out isolation sampling analog-to-digital conversion respectively, then judges that its wiring is corrected errors by master control system.
as shown in Figures 6 and 7, direct current anti-misconnection monitoring means can also comprise the primary voltage that multichannel is connected with the input of inverter respectively, a non-linear voltage testing circuit is provided with between the positive and negative terminal of every road primary voltage, non-linear voltage testing circuit comprises the first via parallel with one another and the second tunnel, the first via is provided with the Zener diode Z of series connection mutually, indicating device and a conducting direction puncture the contrary backward diode D in direction with Zener diode Z, second tunnel is provided with bypass resistance R2, bypass resistance can be configured to infinity in some cases, namely R2 position directly disconnects.
indicating device can be the various indicating circuits by Current Control, other various components and parts having logic judging function or judged by the operating state of analog quantity to inverter such as such as LED, optical coupled switch, calutron isolation and amplifier.In the present embodiment, indicating device is be connected on the LED between Zener diode Z and backward diode D.
in normal state, each road primary voltage is mutually isolated, and not coupling between each testing circuit, the positive and negative terminal of inverter by Zener diode Z, and makes LED bright and provides normal index signal.
when the positive and negative terminal phase mutual connection inverse time of inverter, the positive and negative terminal of inverter, not by backward diode D conducting, makes LED extinguish and provides abnormal index signal.If now, inverter is opened rashly, and backward diode D plays the effect of reverse protection to whole circuit.
when the two-way of inverter or the negative terminal of multichannel primary voltage or positive anode phase mutual connection inverse time, as shown in Figure 3, primary voltage is connected mutually with being separately positioned on it.Now, all voltage detecting circuits are in series connection, and due to different parameter designing, their voltage detecting input equiva lent impedance due to difference each other, nonlinear change can occur, produce larger difference, cause the voltage at each testing circuit two ends to produce larger difference.When in the non-linear voltage testing circuit of arbitrary road, the voltage of both sides does not reach the puncture voltage of Zener diode Z, the resistance of Zener diode Z will become infinitely great, pass from bypass resistance R2 to make electric current, LED is caused to be extinguished, the output signal of indicating device is different, by analyzing output signal, wiring error can be judged easily.Meanwhile, also can determine to make mistakes a little.
between multichannel primary voltage and described inverter i.e. multichannel primary voltage output on be provided with a circuit breaker, this circuit breaker has a way control switch corresponding with arbitrary road of described multichannel primary voltage.Due to each circuit independently, can control use or remove all voltage detecting circuits by the control switch of simple circuit breaker, just only need a disjunction with the breaker control inversion of 4 way control switch as an inverter has 4 road primary voltages, this significantly can reduce unwanted losses.
an inversion unit inputs phase one_to_one corresponding with a direct current, namely just has an inversion unit be electrically connected mutually with it by the input of a direct current.As shown in Figure 6, each inversion unit comprises DC filtering module, boost module, inversion module, ac filter unit, MPPT controller.DC filtering module is used for carrying out filtering to direct current input, boost module is used for the direct voltage exported from DC filtering module to boost, inversion module is used for changing direct voltage after boosting into alternating voltage, ac filter unit is used for the alternating voltage after by boosting and carries out filtering, and MPPT controller is used for controlling to make the input of each direct current have best operating voltage to boost module and inversion module.
the busbar that confluxes is electrically connected mutually with multiple inversion unit, the alternating voltage exported is aggregated into a road and exports from multiple inversion unit.
be disposed with isolating transformer, electromagnetic interface filter, AC circuit breaker, earth protective device confluxing between busbar and electrical network.
isolating transformer realizes the isolation with electrical network.Electromagnetic interface filter filtering exchanges the high fdrequency component exported, and improves the EMI performance of inverter.AC circuit breaker realizes, with the clutch of electrical network, having overcurrent overheat unhook defencive function simultaneously.
as shown in Figure 9, earth protective device comprises photovoltaic fuse 16, master cpu 12, leakage current sensor 15, leakage current sampling modulate circuit 13, ground connection cut-off switch 14;
ground connection cut-off switch 14, electricity leakage sensor 15, photovoltaic fuse 16 are connected, photovoltaic fuse 16 ground connection; Ground connection cut-off switch electrical connection film battery assembly 17.
leakage current sensor 15 is connected with master cpu 12 by leakage current sampling modulate circuit 13, processes for gathering leakage current signal and passing to leakage current sampling modulate circuit 13;
master cpu 12 is connected with ground connection cut-off switch 14, for receiving the leakage current signal after the process of leakage current sample circuit and the folding of Based Intelligent Control ground connection cut-off switch 14.Earth protective device also comprises the DC switch 20 be located on direct current signal line and the alternating-current switch 21 be located on AC signal line.
in the course of work, if occur indirectly or directly to leak electricity, now leakage current sensor 15 detects electric leakage signal and send to master cpu 12 after leakage current sampling modulate circuit 13 carries out signal condition, and master cpu 12 intelligent selection can disconnect ground connection cut-off switch 14, DC switch 20, alternating-current switch 21.
when directly leaking electricity, the components and parts such as modulate circuit 13 and ground connection cut-off switch 14, DC switch 20, alternating-current switch 21, master cpu 12, leakage current sensor 15, leakage current are sampled break down; when causing switch to disconnect; photovoltaic fuse 16 fuses, and completes disconnection defencive function.
earth protective device also comprises one and is arranged between film battery assembly 17 and inversion unit 11 by the DC switch 20 that master control CPU12 controls.Earth protective device also comprises one and is arranged on the output of inversion unit 11 and is subject to the DC switch 21 that master control CPU12 controls.
in the present embodiment, high-power photovoltaic combining inverter also comprises the lightning protection device being arranged in parallel and inputting at each direct current.
as shown in Figure 3, in the second embodiment of the present invention, isolating transformer can be saved when isolated instances is more excellent.
as shown in Figure 4, in the third embodiment of the present invention, the EMI performance of this high-power photovoltaic combining inverter, preferably in situation, can save electromagnetic interface filter.
as shown in Figure 5, in the fourth embodiment of the present invention, in the uncomplicated situation of some less demanding circuit, can save direct current anti-misconnection monitoring means, the mode that can detect primary voltage manually by instrument judges that wiring is corrected errors.
the present invention adopts above structure, has the following advantages:
1, owing to there being the input of many group direct currents, often organize Dou You mono-tunnel independently MPPT controller, so any riches all the way raw blocks, lost efficacy or aging decay, only can affect the power stage of the cell plate group string on this road, and the normal output on other roads can not be affected, thus the risk that systems generate electricity efficiency declines to a great extent is dropped to minimum;
2, owing to there being the input of many group direct currents, wide input voltage can increase photovoltaic DC-to-AC converter operating voltage range, improves systems generate electricity amount, improves power station returns of investment, and can adapt to more application scenario;
3, owing to there being the input of many group direct currents, when wherein break down in a road, under non-stop-machine situation, power generation loss can be reduced for client to Fast-Maintenance, not even shutdown maintenance, for enterprise reduces;
4, be provided with direct current anti-misconnection monitoring means to prevent the misconnection of many group direct current incoming lines, avoid answering misconnection and the infringement that causes.
above specific embodiment of the present invention is illustrated in conjunction with diagram, clearly on the basis not leaving scope and spirit of the present invention, much can revise prior art and technique.In art of the present invention, the usual knowledge of a GPRS, just within the scope of technology main idea of the present invention, can carry out diversified change.
Claims (2)
1. a high-power photovoltaic combining inverter, is characterized in that, it comprises:
Multiple direct current input;
Multiple inversion unit, one of them inversion unit inputs phase one_to_one corresponding with a direct current, and each inversion unit comprises DC filtering module, for carrying out filtering to direct current input; And boost module, for the direct voltage exported from DC filtering module is boosted; And inversion module, for changing direct voltage after boosting into alternating voltage; And ac filter unit, use
In the alternating voltage after boosting is carried out filtering; And MPPT controller, make the input of each direct current have best operating voltage for controlling boost module and inversion module;
Conflux busbar, the alternating voltage exported gathered from multiple inversion unit;
AC circuit breaker, is arranged on and confluxes between busbar and electrical network;
Described high-power photovoltaic combining inverter also comprises the direct current anti-misconnection monitoring means be arranged between multiple described direct current inputs and described inversion unit; Described direct current anti-misconnection monitoring means comprises the primary voltage that multichannel is connected with the input of inversion unit respectively, a non-linear voltage testing circuit is provided with between the positive and negative terminal of every road primary voltage, described non-linear voltage testing circuit comprises the first via parallel with one another and the second tunnel, the described first via is provided with the Zener diode of series connection mutually, indicating device and a conducting direction and punctures the contrary backward diode in direction with Zener diode, described second tunnel is provided with bypass resistance; The optimum configurations of non-linear voltage testing circuit described in each is different.
2. high-power photovoltaic combining inverter according to claim 1, it is characterized in that: it also comprise be arranged on multichannel primary voltage output on a circuit breaker, this circuit breaker has a way control switch corresponding with arbitrary road of described multichannel primary voltage.
3. high-power photovoltaic combining inverter according to claim 1, is characterized in that: it also comprises the electromagnetic interface filter being arranged on and confluxing between busbar and AC circuit breaker.
4. high-power photovoltaic combining inverter according to claim 3, is characterized in that: it also comprises the isolating transformer being arranged on and confluxing between busbar and electromagnetic interface filter.
5. high-power photovoltaic combining inverter according to claim 1, is characterized in that: it also comprises the lightning protection device being arranged in parallel and inputting at each direct current.
6. the high-power photovoltaic combining inverter according to claim l, is characterized in that: it also comprises the earth protective device be arranged between AC circuit breaker and electrical network.
7. high-power photovoltaic combining inverter according to claim 6, is characterized in that: described earth protective device comprises photovoltaic fuse, master cpu, leakage current sensor, leakage current sampling modulate circuit, ground connection cut-off switch; Described ground connection cut-off switch, described electricity leakage sensor and described photovoltaic fuse are in series ground connection; Described ground connection cut-off switch and described electric leakage
Flow sensor is connected with described master cpu by leakage current sampling modulate circuit, for gathering leakage current signal and passing to the process of leakage current sampling modulate circuit; Described master cpu is connected with described ground connection cut-off switch, controls the folding of ground connection cut-off switch for the leakage current signal after receiving leakage current sampling modulate circuit process.
8. high-power photovoltaic combining inverter according to claim 1, is characterized in that: it also comprises a panel array, and described panel array is divided into the input of multiple direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339476.9A CN102882227B (en) | 2012-09-14 | 2012-09-14 | High-power photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339476.9A CN102882227B (en) | 2012-09-14 | 2012-09-14 | High-power photovoltaic grid-connected inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102882227A CN102882227A (en) | 2013-01-16 |
| CN102882227B true CN102882227B (en) | 2015-03-18 |
Family
ID=47483452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210339476.9A Active CN102882227B (en) | 2012-09-14 | 2012-09-14 | High-power photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102882227B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560541B (en) * | 2013-11-16 | 2015-10-14 | 沈阳工业大学 | A kind of alternating current-direct current mixing microgrid fault traversing control device and method |
| 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 |
| CN103986192B (en) * | 2014-05-28 | 2016-05-25 | 阳光电源股份有限公司 | A kind of non-isolated photovoltaic grid-connected inverter and grid-connected photovoltaic system |
| CN105591399A (en) * | 2014-10-23 | 2016-05-18 | 中兴通讯股份有限公司 | Inverter control method and inverter |
| CN106877815B (en) * | 2015-12-14 | 2019-08-13 | 成都鼎桥通信技术有限公司 | The detection method and device that a kind of photovoltaic group series winding connects |
| CN106100571A (en) * | 2016-07-21 | 2016-11-09 | 南京南瑞继保电气有限公司 | A kind of group string data photovoltaic DC-to-AC converter exchange wiring construction in parallel and grid-connected unit |
| CN106532650A (en) * | 2016-08-31 | 2017-03-22 | 苏州迈力电器有限公司 | Inverter protection circuit |
| CN106526408A (en) * | 2016-08-31 | 2017-03-22 | 苏州迈力电器有限公司 | Inverter protection circuit system |
| CN106329486A (en) * | 2016-08-31 | 2017-01-11 | 苏州迈力电器有限公司 | Novel inverter protection circuit |
| CN110739717B (en) * | 2018-07-19 | 2022-04-08 | 阳光电源股份有限公司 | Intelligent photovoltaic module and application system thereof |
| CN109119300A (en) * | 2018-10-29 | 2019-01-01 | 无锡尚德益家新能源有限公司 | Photovoltaic DC-to-AC converter switch for the shutdown of direct current branch |
| CN110880741B (en) * | 2019-12-02 | 2022-02-18 | 阳光电源股份有限公司 | Inversion system and input misconnection detection method of symmetrical three-level booster circuit of inversion system |
| CN111555652A (en) * | 2020-05-22 | 2020-08-18 | 中国矿业大学 | High-power-density converter and structure based on silicon carbide MOSFET module |
| WO2024021118A1 (en) * | 2022-07-29 | 2024-02-01 | 华为数字能源技术有限公司 | Photovoltaic power supply system and control method therefor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118108A (en) * | 1994-11-15 | 1996-03-06 | 松下电工株式会社 | Circuit breaker |
| JP2001169561A (en) * | 1999-12-02 | 2001-06-22 | Canon Inc | Power supply device, controller and its control method |
| CN101436833A (en) * | 2007-11-14 | 2009-05-20 | 通用电气公司 | Method and system to convert direct current (DC) to alternating current (AC) using a photovoltaic inverter |
| CN201839015U (en) * | 2009-08-11 | 2011-05-18 | Abb研究有限公司 | Power converter component for solar power station |
| CN202002997U (en) * | 2011-04-19 | 2011-10-05 | 浙江万里学院 | Grounding fault detector for solar panel |
| CN202034795U (en) * | 2011-04-15 | 2011-11-09 | 陕西长岭光伏电气有限公司 | Inverter interconnecting system with phase compensating function |
| CN202906486U (en) * | 2012-09-14 | 2013-04-24 | 江苏兆伏新能源有限公司 | High-power photovoltaic grid-connected inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5542942B2 (en) * | 2010-08-20 | 2014-07-09 | 東芝三菱電機産業システム株式会社 | Grounding device |
-
2012
- 2012-09-14 CN CN201210339476.9A patent/CN102882227B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118108A (en) * | 1994-11-15 | 1996-03-06 | 松下电工株式会社 | Circuit breaker |
| JP2001169561A (en) * | 1999-12-02 | 2001-06-22 | Canon Inc | Power supply device, controller and its control method |
| CN101436833A (en) * | 2007-11-14 | 2009-05-20 | 通用电气公司 | Method and system to convert direct current (DC) to alternating current (AC) using a photovoltaic inverter |
| CN201839015U (en) * | 2009-08-11 | 2011-05-18 | Abb研究有限公司 | Power converter component for solar power station |
| CN202034795U (en) * | 2011-04-15 | 2011-11-09 | 陕西长岭光伏电气有限公司 | Inverter interconnecting system with phase compensating function |
| CN202002997U (en) * | 2011-04-19 | 2011-10-05 | 浙江万里学院 | Grounding fault detector for solar panel |
| CN202906486U (en) * | 2012-09-14 | 2013-04-24 | 江苏兆伏新能源有限公司 | High-power photovoltaic grid-connected inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102882227A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102882227B (en) | High-power photovoltaic grid-connected inverter | |
| CN102540070B (en) | Control and detection circuit for four relays and detection method thereof | |
| CN103715983B (en) | The failure detector of solar power system and method | |
| CN207819564U (en) | Failure monitoring system with current detection function | |
| CN101981776A (en) | System and method for ground fault detection and interruption | |
| CN204948018U (en) | A kind of circuit of multi-machine parallel connection system prevention cell panel PID effect | |
| CN101846707B (en) | Equipment and method for riding through testing platform at low voltage on low-voltage side | |
| CN102033181B (en) | Portable spare power automatic switching calibrator | |
| US9397235B2 (en) | Photovoltaic string combiner with disconnect having provision for converting between grounded and ungrounded systems | |
| CN206164112U (en) | A attenuating device is inductiond to anti current potential for photovoltaic power generation system | |
| CN104333213A (en) | Protecting method for output overvoltage of PV array, device and system | |
| CN102280864A (en) | Post-failure live treatment method for protection device of distribution network system and portable protection device | |
| CN108459230B (en) | Fault detection method for electrical high-voltage equipment | |
| CN107807305B (en) | Component type inverter wiring detection method, device and system | |
| WO2021207880A1 (en) | Short circuit protection apparatus, short circuit protection method, and photovoltaic power generation system | |
| WO2021208045A1 (en) | Power supply system | |
| CN202906486U (en) | High-power photovoltaic grid-connected inverter | |
| CN203927005U (en) | Electric valve control circuit and the electric operated valve instrument that comprises this circuit | |
| CN216215923U (en) | Photovoltaic power generation system supporting direct-current arc protection | |
| CN202550476U (en) | Comprehensive protective device of coal mine power center | |
| WO2021208044A1 (en) | Power supply system | |
| CN203251092U (en) | Multifunctional transition source box | |
| CN203243054U (en) | Intelligent low-voltage filter compensation module | |
| CN102891464A (en) | Photovoltaic string protection device | |
| CN204439733U (en) | Electric automobile electric components FCS functional check-out set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 212200 Yangzhong City, Jiangsu Province Economic Development Zone, Hong Xing Road, No. 588, No. Patentee after: Aisima new energy technology (Yangzhong) Co., Ltd. Address before: 212200 Yangzhong City, Jiangsu Province Economic Development Zone, Hong Xing Road, No. 588, No. Patentee before: Jiangsu Zof New Energy Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 212200 Gangxing Road 588, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province Patentee after: Aishiwei New Energy Technology (Yangzhong) Co., Ltd. Address before: 212200 Gangxing Road 588, Yangzhong Economic Development Zone, Zhenjiang City, Jiangsu Province Patentee before: Aisima new energy technology (Yangzhong) Co., Ltd. |