CN202841003U - Novel three-phase photovoltaic grid-connected inverter system structure - Google Patents
Novel three-phase photovoltaic grid-connected inverter system structure Download PDFInfo
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- CN202841003U CN202841003U CN2012204430698U CN201220443069U CN202841003U CN 202841003 U CN202841003 U CN 202841003U CN 2012204430698 U CN2012204430698 U CN 2012204430698U CN 201220443069 U CN201220443069 U CN 201220443069U CN 202841003 U CN202841003 U CN 202841003U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The utility model discloses a novel three-phase photovoltaic grid-connected inverter system structure. Photovoltaic array output terminals are connected with DC circuit breakers (1), DC EMI filters (2) and BOOST circuits (3) used for direct current boosting and maximum power tracing successively. Output terminals of the BOOST circuits (3) are connected in parallel, and then successively connected with a DC support capacitor (4) used for absorbing ripple current from a DC side and an inverter side, a three-phase full-bridge IGBT inverter circuit (5) used for converting DC to AC, a sine filter (6) used for eliminating AC harmonic waves, an AC main contactor (7) used for on-off control for circuit protection, an AC EMI filter (8) used for eliminating high-frequency interference and an AC circuit breaker (9) used for realizing the connection and the disconnection of a main power circuit and a power grid. An output terminal of the AC circuit breaker (9) is connected with the power grid.
Description
[technical field]
The utility model relates to a kind of Three phase photovoltaic synchronization inverter system structure.
[background technology]
At present, 1MW three-phase photovoltaic generating system as shown in Figure 3, mostly adopt two 500kW photovoltaic combining inverter outputs directly in parallel, perhaps then as shown in Figure 4 two 500kW photovoltaic combining inverters of employing are realized by two divisions two the low pressure winding parallels that case becomes that boost, the electric pressure that is incorporated into the power networks is that these are several for 270V, 300V, 315V substantially, its voltage that is incorporated into the power networks is low, and system's generating efficiency is lower.The battery component combination of prime will be sought unification, and can not realize that the photovoltaic array of multiple different combination types is incorporated into the power networks together.In order to satisfy the generating of different photovoltaic array composition union net and to improve system's generating efficiency, the design people's utility model goes out following technical scheme.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, a kind of Three phase photovoltaic synchronization inverter system structure is provided, it generates electricity by way of merging two or more grid systems after can carrying out different photovoltaic array output DCs independently boosting together, compatible good, respectively the photovoltaic array of correspondence is boosted and carry out the MPPT maximum power point tracking control of BOOST booster circuit by controller by the BOOST booster circuit, enlarged the MPPT maximum power point tracking scope, dc voltage and inversion transformation efficiency have been improved, then just can be connected from different photovoltaic arrays by an independent inverter and generate electricity by way of merging two or more grid systems, save cost, simultaneously, satisfy different environmental demands, improve the efficiency of light energy utilization and system's generating efficiency.
For achieving the above object, the utility model has adopted following technical proposal:
A kind of Three phase photovoltaic synchronization inverter system structure; generate electricity by way of merging two or more grid systems together after can carrying out different photovoltaic array output DCs independently boosting; be connected with in turn dc circuit breaker 1 at each photovoltaic array dc output end; direct current electromagnetic interface filter 2; and be used for output DC is boosted and the BOOST booster circuit 3 of maximal power tracing; after being connected in parallel, the output of described all BOOST booster circuits 3 is connected with in turn for the DC support electric capacity 4 that absorbs from the ripple current of DC side and inverter side; be used for the three phase full bridge IGBT inverter circuit 5 of converting direct-current power into alternating-current power; be used for eliminating the sinusoidal filter 6 of AC harmonic; the interchange main contactor 7 that is used for the control of circuit protection break-make; be used for eliminating the interchange electromagnetic interface filter 8 of High-frequency Interference; and the AC circuit breaker 9 that is used for realizing main power circuit and electrical network break-make; described AC circuit breaker 9 outputs are connected with electrical network; described system configuration also includes for the current/voltage detection module 12 that detects in real time alternating current-direct current side current/voltage; and the detected value by current/voltage detection module 12 comes BOOST booster circuit 3 is carried out the controller 15 of maximal power tracing control, described controller 15 respectively with BOOST booster circuit 3; three phase full bridge IGBT inverter circuit 5 control connections.
Described current/voltage detection module 12 comprises the direct current voltage sensor summation current transformer for detection of the DC side current/voltage, and for detection of the AC voltage sampling plate summation current transformer of ac-side current voltage.
Be connected with direct current arrester 10 between described each photovoltaic array dc output end and corresponding dc circuit breaker 1 input, be connected with alternating-current lightning arrestor 11 between described AC circuit breaker 9 outputs and the electrical network.
Described interchange main contactor 7 two ends also and be connected to the auxiliary switching circuit that forms by exchanging auxiliary contactor 71 and buffer resistance 72 serial connections.
The number of described photovoltaic array, dc circuit breaker 1, direct current electromagnetic interface filter 2 and BOOST booster circuit 3 all is two, after being connected, the output cathode end of described two BOOST booster circuits 3 with 4 anodal connections of DC support electric capacity, is connected with DC support electric capacity 4 negative poles after negative pole end is connected.
The number of described photovoltaic array, dc circuit breaker 1, direct current electromagnetic interface filter 2 and BOOST booster circuit 3 all is 3, after being connected, the output cathode end of described 3 BOOST booster circuits 3 with 4 anodal connections of DC support electric capacity, is connected with DC support electric capacity 4 negative poles after negative pole end is connected.
Described sinusoidal filter 6 is the LCL sinusoidal filter.
The beneficial effects of the utility model are:
1, generates electricity by way of merging two or more grid systems together compatible good to the photovoltaic array that will access after can carrying out different photovoltaic array output DCs independently boosting;
2, respectively the photovoltaic array of correspondence is boosted by the BOOST booster circuit and by controller to carrying out the MPPT maximum power point tracking control of BOOST booster circuit, enlarged the MPPT maximum power point tracking scope, improved dc voltage and inversion transformation efficiency.
3, just can be connected from different photovoltaic arrays by an independent inverter and generate electricity by way of merging two or more grid systems, save cost, improved and voltage on line side, simultaneously, satisfy different photovoltaic array compound mode and different environmental demands, improve the efficiency of light energy utilization and system's generating efficiency.
4, by increasing direct current arrester and AC circuit breaker, prevent thunderbolt, protection device safety.
5, by auxiliary switching circuit, the rush of current when reducing the starting up.
[description of drawings]
Fig. 1 is the electrical block diagram of the utility model embodiment 1.
Fig. 2 is the electrical block diagram of the utility model embodiment 2.
Fig. 3 is the photovoltaic parallel in system structural representation that uses three-phase transformer in the prior art.
Fig. 4 is the photovoltaic parallel in system structural representation that uses the two transformer with split windings of three-phase in the prior art.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and execution mode of the present utility model:
A kind of Three phase photovoltaic synchronization inverter system structure; generate electricity by way of merging two or more grid systems together after can carrying out different photovoltaic array output DCs independently boosting; it is characterized in that being connected with in turn dc circuit breaker 1 at each photovoltaic array dc output end; direct current electromagnetic interface filter 2; and be used for output DC is boosted and the BOOST booster circuit 3 of maximal power tracing; after being connected in parallel, the output of described all BOOST booster circuits 3 is connected with in turn for the DC support electric capacity 4 that absorbs from the ripple current of DC side and inverter side; be used for the three phase full bridge IGBT inverter circuit 5 of converting direct-current power into alternating-current power; be used for eliminating the sinusoidal filter 6 of AC harmonic; the interchange main contactor 7 that is used for the control of circuit protection break-make; be used for eliminating the interchange electromagnetic interface filter 8 of High-frequency Interference; and the AC circuit breaker 9 that is used for realizing main power circuit and electrical network break-make; described AC circuit breaker 9 outputs are connected with electrical network; described system configuration also includes for the current/voltage detection module 12 that detects in real time alternating current-direct current side current/voltage; and the controller 15 that comes BOOST booster circuit 3 is carried out maximal power tracing control by the detected value of current/voltage detection module 12; described controller 15 respectively with BOOST booster circuit 3; three phase full bridge IGBT inverter circuit 5 control connections are carried out respectively the inversion control of boosting rectifier control and the three phase full bridge IGBT inverter circuit 5 of BOOST booster circuit 3.
Current/voltage detection module 12 comprises the direct current voltage sensor summation current transformer for detection of the DC side current/voltage as mentioned above, and for detection of the AC voltage sampling plate summation current transformer of ac-side current voltage, so that 15 pairs of BOOST booster circuits of controller 3 carry out maximal power tracing control.
Be connected with direct current arrester 10 between aforesaid each photovoltaic array dc output end and corresponding dc circuit breaker 1 input, be connected with alternating-current lightning arrestor 11 between described AC circuit breaker 9 outputs and the electrical network, prevent thunderbolt, protection device safety.
Exchange as mentioned above main contactor 7 and connect under normal condition, failure condition disconnects, and realizes defencive function.
Exchange main contactor 7 two ends described in the utility model also and be connected to the auxiliary switching circuit that forms by exchanging auxiliary contactor 71 and buffer resistance 72 serial connections, reduce rush of current by buffer resistance 72.During start, interchange auxiliary contactor 71 closures in the auxiliary switching circuit at first, alternating current is by buffer resistance 72, and utilize the three phase rectifier bridge circuit of the fly-wheel diode formation in the three phase full bridge IGBT inverter circuit 5 that DC support electric capacity 4 is charged, and then 7 pairs of DC support electric capacity of closed main contactor 4 continue charging.
Embodiment 1, as shown in Figure 1, described photovoltaic array is two, the rank of output dc voltage is respectively 500V, during 700V, each photovoltaic array is respectively by dc circuit breaker 1, direct current electromagnetic interface filter 2, BOOST booster circuit 3 boosts, and controller 15 carries out the maximal power tracing control of BOOST booster circuit 3, boost in voltage to the 960V rank, then carrying out three-phase inversion by three phase full bridge IGBT inverter circuit 5 generates electricity by way of merging two or more grid systems, the voltage that is incorporated into the power networks can be brought up to more than the 620V, pass through said structure, realized being incorporated into the power networks together of two kinds of different photovoltaic arrays, not only enlarge the MPPT maximum power point tracking scope, and improved dc voltage and inversion transformation efficiency.
Embodiment 2, as shown in Figure 2, described photovoltaic array is 3, the rank of output dc voltage is respectively 500V, 700V, during 900V, each photovoltaic array is respectively by dc circuit breaker 1, direct current electromagnetic interface filter 2, BOOST booster circuit 3 boosts, and controller 15 carries out the maximal power tracing control of BOOST booster circuit 3, dc voltage is boosted to the 960V rank, then carrying out three-phase inversion by three phase full bridge IGBT inverter circuit 5 generates electricity by way of merging two or more grid systems, the voltage that is incorporated into the power networks can be brought up to more than the 620V, pass through said structure, realized being incorporated into the power networks together of 3 kinds of different photovoltaic arrays, not only enlarge the MPPT maximum power point tracking scope, and improved dc voltage and inversion transformation efficiency.
Sinusoidal filter 6 described in above two embodiment can adopt LCL sinusoidal filter harmonic carcellation to obtain with electrical network with alternating current frequently.
The specific works principle of the utility model and above two embodiment is as follows: the direct current that photovoltaic array transforms is drawn after the integration of DC distribution case and is respectively organized positive and negative DC leadout; be input to direct current electromagnetic interface filter 2 by dc circuit breaker 1 and carry out low-pass filtering; eliminate direct current medium-high frequency interference signal; and realization is to the protection of DC distribution end; then respectively each group input direct voltage is boosted by BOOST booster circuit 3; simultaneously; current/voltage detection module 12 detects dc voltage in real time; electric current; AC voltage; electric current; pass through power calculation by controller 15; finish the maximal power tracing of each BOOST booster circuit 3; be sent to three phase full bridge IGBT inverter circuit 5 after galvanic current absorbed ripple currents by DC support electric capacity 4; and finish the driving of three phase full bridge IGBT inverter circuit 5 by controller 15; then the alternating current of three phase full bridge IGBT inverter circuit 5 outputs obtains and the alternating current of electrical network with frequency through sinusoidal filter 6 harmonic carcellations, and is connected to the grid after electromagnetic interface filter 8 is eliminated High-frequency Interference by exchanging.
Generally speaking, the rank of the output dc voltage of photovoltaic array is for as above several on the market, aforesaid two embodiment have satisfied actual major applications, if will connect other photovoltaic array in the middle of actual, those skilled in the art can realize required according to above-mentioned technology enlightenment again.
The photovoltaic array output voltage size of carrying among the embodiment in the utility model and the parameters such as voltage level that direct current boosted to 960V by BOOST booster circuit 3; as the restriction to the utility model protection range, it is not the setting parameter in a kind of specific embodiment.The utility model protection be a kind of topological structure that generates electricity by way of merging two or more grid systems together after can carrying out different photovoltaic array output DCs independently boosting; satisfy the different photovoltaic array compound mode; compatible good; by adopting many group BOOST booster circuits 3 respectively many groups of different photovoltaic arrays to be boosted; and by controller 15 each BOOST booster circuit 3 is carried out MPPT maximum power point tracking and control; enlarged the MPPT maximum power point tracking scope; greatly improved dc voltage; then carry out the inversion grid connection generating by an inverter; save cost; improved and voltage on line side; simultaneously; satisfy different photovoltaic array compound mode and different environmental demands, improve the efficiency of light energy utilization and system's generating efficiency.
Claims (7)
1. Three phase photovoltaic synchronization inverter system structure; generate electricity by way of merging two or more grid systems together after can carrying out different photovoltaic array output DCs independently boosting; it is characterized in that being connected with in turn dc circuit breaker (1) at each photovoltaic array dc output end; direct current electromagnetic interface filter (2); and be used for output DC is boosted and the BOOST booster circuit (3) of maximal power tracing; after being connected in parallel, the output of described all BOOST booster circuits (3) is connected with in turn for the DC support electric capacity (4) that absorbs from the ripple current of DC side and inverter side; be used for the three phase full bridge IGBT inverter circuit (5) of converting direct-current power into alternating-current power; be used for eliminating the sinusoidal filter (6) of AC harmonic; the interchange main contactor (7) that is used for the control of circuit protection break-make; be used for eliminating the interchange electromagnetic interface filter (8) of High-frequency Interference; and the AC circuit breaker (9) that is used for realizing main power circuit and electrical network break-make; described AC circuit breaker (9) output is connected with electrical network; described system configuration also includes for the current/voltage detection module (12) that detects in real time alternating current-direct current side current/voltage; and the detected value by current/voltage detection module (12) comes BOOST booster circuit (3) is carried out the controller (15) of maximal power tracing control, described controller (15) respectively with BOOST booster circuit (3); three phase full bridge IGBT inverter circuit (5) control connection.
2. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1, it is characterized in that described current/voltage detection module (12) comprises the direct current voltage sensor summation current transformer for detection of the DC side current/voltage, and for detection of the AC voltage sampling plate summation current transformer of ac-side current voltage.
3. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1, it is characterized in that being connected with direct current arrester (10) between described each photovoltaic array dc output end and corresponding dc circuit breaker (1) input, be connected with alternating-current lightning arrestor (11) between described AC circuit breaker (9) output and the electrical network.
4. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1 is characterized in that described interchange main contactor (7) two ends also and is connected to the auxiliary switching circuit that forms by exchanging auxiliary contactor (71) and buffer resistance (72) serial connection.
5. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1, the number that it is characterized in that described photovoltaic array, dc circuit breaker (1), direct current electromagnetic interface filter (2) and BOOST booster circuit (3) all is two, be connected with DC support electric capacity (4) is anodal after the output cathode end of described two BOOST booster circuits (3) is connected, be connected with DC support electric capacity (4) negative pole after negative pole end is connected.
6. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1, the number that it is characterized in that described photovoltaic array, dc circuit breaker (1), direct current electromagnetic interface filter (2) and BOOST booster circuit (3) all is 3, be connected with DC support electric capacity (4) is anodal after the output cathode end of described 3 BOOST booster circuits (3) is connected, be connected with DC support electric capacity (4) negative pole after negative pole end is connected.
7. a kind of Three phase photovoltaic synchronization inverter system structure according to claim 1 is characterized in that described sinusoidal filter (6) is the LCL sinusoidal filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012204430698U CN202841003U (en) | 2012-08-31 | 2012-08-31 | Novel three-phase photovoltaic grid-connected inverter system structure |
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| CN2012204430698U CN202841003U (en) | 2012-08-31 | 2012-08-31 | Novel three-phase photovoltaic grid-connected inverter system structure |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832842A (en) * | 2012-08-31 | 2012-12-19 | 广东明阳龙源电力电子有限公司 | Novel three-phase photovoltaic grid-connected inverter system |
| CN103414361A (en) * | 2013-07-26 | 2013-11-27 | 常州佳讯光电产业发展有限公司 | Main circuit topological structure of single megawatt photovoltaic grid-connected inverter |
| CN103633865A (en) * | 2013-11-27 | 2014-03-12 | 苏州高创特新能源工程有限公司 | Large-power photovoltaic gird-connected inverter |
| CN103887956A (en) * | 2014-04-15 | 2014-06-25 | 上海西艾爱电子有限公司 | High-voltage and large-current harmonics filter for photovoltaic inverter system |
| CN104935202A (en) * | 2015-04-30 | 2015-09-23 | 祥天控股（集团）有限公司 | Solar inverter |
| CN106100406A (en) * | 2015-04-27 | 2016-11-09 | Abb技术有限公司 | Obtain the method for value, interlock circuit and the inverter of instruction inverter ac electric current |
| CN106533148A (en) * | 2016-12-20 | 2017-03-22 | 北京天诚同创电气有限公司 | Photovoltaic inverter having emergency stop function and emergency stop method for photovoltaic inverter |
| CN107910900A (en) * | 2017-12-28 | 2018-04-13 | 国网上海节能服务有限公司 | A kind of roof photovoltaic power generation system |
| CN108233404A (en) * | 2016-12-21 | 2018-06-29 | 南京工程学院 | Actively anti-reverse flow pattern single-phase grid-connected inverter |
| CN112994610A (en) * | 2021-04-25 | 2021-06-18 | 中国人民解放军海军工程大学 | Photovoltaic water generator power supply used in island and reef environment |
| US11108320B2 (en) * | 2017-02-14 | 2021-08-31 | Ellenberger & Poensgen Gmbh | Method and voltage multiplier for converting an input voltage, and disconnector |
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2012
- 2012-08-31 CN CN2012204430698U patent/CN202841003U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832842A (en) * | 2012-08-31 | 2012-12-19 | 广东明阳龙源电力电子有限公司 | Novel three-phase photovoltaic grid-connected inverter system |
| CN103414361A (en) * | 2013-07-26 | 2013-11-27 | 常州佳讯光电产业发展有限公司 | Main circuit topological structure of single megawatt photovoltaic grid-connected inverter |
| CN103633865A (en) * | 2013-11-27 | 2014-03-12 | 苏州高创特新能源工程有限公司 | Large-power photovoltaic gird-connected inverter |
| CN103887956B (en) * | 2014-04-15 | 2016-01-20 | 上海西艾爱电子有限公司 | A kind of high-voltage great-current harmonic filter being suitable for photovoltaic inverting system and using |
| CN103887956A (en) * | 2014-04-15 | 2014-06-25 | 上海西艾爱电子有限公司 | High-voltage and large-current harmonics filter for photovoltaic inverter system |
| CN106100406A (en) * | 2015-04-27 | 2016-11-09 | Abb技术有限公司 | Obtain the method for value, interlock circuit and the inverter of instruction inverter ac electric current |
| CN106100406B (en) * | 2015-04-27 | 2020-06-12 | Abb瑞士股份有限公司 | Method for obtaining a value indicative of an alternating current of an inverter, associated circuit and inverter |
| CN104935202A (en) * | 2015-04-30 | 2015-09-23 | 祥天控股（集团）有限公司 | Solar inverter |
| CN106533148A (en) * | 2016-12-20 | 2017-03-22 | 北京天诚同创电气有限公司 | Photovoltaic inverter having emergency stop function and emergency stop method for photovoltaic inverter |
| CN108233404A (en) * | 2016-12-21 | 2018-06-29 | 南京工程学院 | Actively anti-reverse flow pattern single-phase grid-connected inverter |
| US11108320B2 (en) * | 2017-02-14 | 2021-08-31 | Ellenberger & Poensgen Gmbh | Method and voltage multiplier for converting an input voltage, and disconnector |
| CN107910900A (en) * | 2017-12-28 | 2018-04-13 | 国网上海节能服务有限公司 | A kind of roof photovoltaic power generation system |
| CN112994610A (en) * | 2021-04-25 | 2021-06-18 | 中国人民解放军海军工程大学 | Photovoltaic water generator power supply used in island and reef environment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20150831 |
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| EXPY | Termination of patent right or utility model |