CN204465346U - A kind of two-way soft switch transducer for photovoltaic energy storage system - Google Patents
A kind of two-way soft switch transducer for photovoltaic energy storage system Download PDFInfo
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- CN204465346U CN204465346U CN201520121132.XU CN201520121132U CN204465346U CN 204465346 U CN204465346 U CN 204465346U CN 201520121132 U CN201520121132 U CN 201520121132U CN 204465346 U CN204465346 U CN 204465346U
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- bridge circuit
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- parallel branches
- isolating transformer
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of two-way soft switch transducer for photovoltaic energy storage system, comprise main full-bridge circuit, auxiliary full-bridge circuit, be responsible for the inductance of stored energy and electric capacity and the isolating transformer for resonance, main full-bridge circuit and auxiliary full-bridge circuit comprise four groups of power switch pipes parallel with one another and diode respectively, these four groups power switch pipes parallel with one another and diode form two parallel branches after series connection between two mutually, and two parallel branches are connected in parallel; Be connected with one end of electric capacity and inductance and isolating transformer between two parallel branches in main full-bridge circuit, between two parallel branches in auxiliary full-bridge circuit, be connected with the other end of isolating transformer.Synchronous rectifier converter is applied to photovoltaic energy storage occasion by the utility model, and the LLC resonant circuit that breaks traditions does not allow capacitive energy to reflux situation about causing.The no-voltage achieving the main full-bridge circuit of converter opens shutoff, significantly improves transducer effciency.
Description
Technical field
The utility model belongs to field of power conversion, relates to a kind of two-way soft switch transducer for photovoltaic energy storage system, achieves high efficiency conversion by soft switch technique.
Background technology
Photovoltaic DC-to-AC converter common at present adopts a kind of Boost+Fullbridge circuit combined structure, no matter its couple of BOOST or single BOOST inputs, because of the unidirectional general character of the main diode D1 of its previous stage BOOST, the energy flow of DC/AC can only be realized, local load or electrical network is sent to only with the electric energy produced by photovoltaic module, but cannot realize, to the DC power supply charging with ability memory function, there is certain use limitation.
Photovoltaic system is due to the uninterrupted of energy and intermittence simultaneously, and the energy storage device (battery) that result in photovoltaic system needs frequent discharge and recharge, so general photovoltaic system often selects lithium battery as the energy storage device in energy-storage system when system.Lithium battery in system generally can select the battery of 48V operating voltage, and under these circumstances, the power electronics modular converter of cell section has to pass through isolation and is linked in photovoltaic system.
Soft switch technique in existing photovoltaic system generally all designs in BOOST section, by adding the mode of looped pipeline, reach the Sofe Switch benefit of supervisor, but BOOST is the two-way flow that cannot realize energy, simultaneously when topological both end voltage difference is excessive, BOOST cannot meet the demand of system, and Sofe Switch also can lose efficacy this time simultaneously.
If system can be caused too complicated by the set of multiple circuit, simultaneously integral installation changes efficiency and can greatly reduce, and this mode often only rests on laboratory stage, can not well be used and promote in the product of reality.
Utility model content
Utility model object: the purpose of this utility model is to solve deficiency of the prior art, provides one to realize energy in bidirectional flow, reduces system loss simultaneously, improves the two-way soft switch transducer for photovoltaic energy storage system of system effectiveness.
Technical scheme: a kind of two-way soft switch transducer for photovoltaic energy storage system described in the utility model, comprise main full-bridge circuit, auxiliary full-bridge circuit, be responsible for the inductance of stored energy and electric capacity and the isolating transformer for resonance, described main full-bridge circuit and auxiliary full-bridge circuit comprise four groups of power switch pipes parallel with one another and diode respectively, these four groups power switch pipes parallel with one another and diode form two each and every one parallel branches after series connection between two mutually, and described two parallel branches are connected in parallel; Be connected with one end of electric capacity and inductance and isolating transformer between two parallel branches in described main full-bridge circuit, between two parallel branches in described auxiliary full-bridge circuit, be connected with the other end of isolating transformer.
Beneficial effect: the utility model ingehious design component parameter, is applied to photovoltaic energy storage occasion by synchronous rectifier converter, and the LLC resonant circuit that breaks traditions does not allow capacitive energy to reflux situation about causing.The no-voltage achieving the main full-bridge circuit of converter opens shutoff, significantly improves transducer effciency.
Accompanying drawing explanation
Fig. 1 is the main circuit of two-way isolation soft switch transducer of the present utility model.
Fig. 2 is the energy flow schematic diagram of battery of the present utility model to BUS bus.
Fig. 3 is the energy flow schematic diagram of BUS bus of the present utility model to battery.
Embodiment
A kind of two-way soft switch transducer for photovoltaic energy storage system as shown in Figure 1, comprise main full-bridge circuit, auxiliary full-bridge circuit, be responsible for inductance L 1 and the electric capacity C1 and the isolating transformer T1 for resonance of stored energy, described main full-bridge circuit and auxiliary full-bridge circuit comprise four groups of power switch pipes (Q1 ~ Q8) parallel with one another and diode (D1 ~ D8) respectively, these four groups power switch pipes parallel with one another and diode form two each and every one parallel branches after series connection between two mutually, and described two parallel branches are connected in parallel; Electric capacity C1 and inductance L 1 is connected with between two parallel branches in described main full-bridge circuit, Lr1 in figure is transformer leakage inductance, and one end of isolating transformer T1, be connected with the other end of isolating transformer T1 between two parallel branches in described auxiliary full-bridge circuit.
The main points that the utility model realizes equal some limit values by the leakage inductance in suitable design isolating transformer, leakage inductance coilloading electric capacity is made to play the effect of stored energy, realized the two-way flow of energy by full-bridge circuit simultaneously, respectively as shown in Figures 2 and 3, suppose initial time T0, battery is in discharge condition; In the T1 moment, battery is in charged state.
Claims (1)
1. the two-way soft switch transducer for photovoltaic energy storage system, it is characterized in that: comprise main full-bridge circuit, auxiliary full-bridge circuit, be responsible for the inductance of stored energy and electric capacity and the isolating transformer for resonance, described main full-bridge circuit and auxiliary full-bridge circuit comprise four groups of power switch pipes parallel with one another and diode respectively, these four groups power switch pipes parallel with one another and diode form two each and every one parallel branches after series connection between two mutually, and described two parallel branches are connected in parallel; Be connected with one end of electric capacity and inductance and isolating transformer between two parallel branches in described main full-bridge circuit, between two parallel branches in described auxiliary full-bridge circuit, be connected with the other end of isolating transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121132.XU CN204465346U (en) | 2015-03-02 | 2015-03-02 | A kind of two-way soft switch transducer for photovoltaic energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121132.XU CN204465346U (en) | 2015-03-02 | 2015-03-02 | A kind of two-way soft switch transducer for photovoltaic energy storage system |
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| Publication Number | Publication Date |
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| CN204465346U true CN204465346U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520121132.XU Active CN204465346U (en) | 2015-03-02 | 2015-03-02 | A kind of two-way soft switch transducer for photovoltaic energy storage system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958826A (en) * | 2016-04-20 | 2016-09-21 | 华北电力大学（保定） | Full-bridge soft-switching circuit laser drive circuit |
| WO2017156692A1 (en) * | 2016-03-15 | 2017-09-21 | Abb Schweiz Ag | Bidirectional dc-dc converter and control method therefor |
| CN107681903A (en) * | 2017-11-17 | 2018-02-09 | 杭州电子科技大学 | A kind of two-way L LLC resonance DC DC converters |
| CN108111021A (en) * | 2017-12-11 | 2018-06-01 | 北京科诺伟业科技股份有限公司 | A kind of two-way current conversion circuit of energy-storage system |
| CN109643950A (en) * | 2016-08-26 | 2019-04-16 | 依赛彼公司 | Improved power supply and operating technology with dual quadrant converter |
| TWI816719B (en) * | 2017-12-29 | 2023-10-01 | 英商伊頓製造有限合夥公司 | Bidirectional DC-AC converter and control method thereof |
-
2015
- 2015-03-02 CN CN201520121132.XU patent/CN204465346U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017156692A1 (en) * | 2016-03-15 | 2017-09-21 | Abb Schweiz Ag | Bidirectional dc-dc converter and control method therefor |
| US20190020281A1 (en) * | 2016-03-15 | 2019-01-17 | Abb Schweiz Ag | Bidirectional dc-dc converter and control method therefor |
| US10396676B2 (en) | 2016-03-15 | 2019-08-27 | Abb Schweiz Ag | Bidirectional DC-DC converter and control method therefor |
| CN105958826A (en) * | 2016-04-20 | 2016-09-21 | 华北电力大学（保定） | Full-bridge soft-switching circuit laser drive circuit |
| CN105958826B (en) * | 2016-04-20 | 2018-11-16 | 华北电力大学（保定） | A kind of full bridge soft switch circuit laser driving circuit |
| CN109643950A (en) * | 2016-08-26 | 2019-04-16 | 依赛彼公司 | Improved power supply and operating technology with dual quadrant converter |
| US11394304B2 (en) | 2016-08-26 | 2022-07-19 | Esab Ab | Power supply having two quadrant converter and techniques for operation |
| CN107681903A (en) * | 2017-11-17 | 2018-02-09 | 杭州电子科技大学 | A kind of two-way L LLC resonance DC DC converters |
| CN107681903B (en) * | 2017-11-17 | 2020-06-05 | 杭州电子科技大学 | Bidirectional L-LLC resonant DC-DC converter |
| CN108111021A (en) * | 2017-12-11 | 2018-06-01 | 北京科诺伟业科技股份有限公司 | A kind of two-way current conversion circuit of energy-storage system |
| TWI816719B (en) * | 2017-12-29 | 2023-10-01 | 英商伊頓製造有限合夥公司 | Bidirectional DC-AC converter and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 226100 No.888, Jiuhua Road, high tech Zone, Nantong City, Jiangsu Province Patentee after: Wotai Energy Co.,Ltd. Address before: 226000 Building 1, Dongda science and Technology Park, Nantong high tech Zone, Tongzhou District, Nantong City, Jiangsu Province Patentee before: NEOVOLTAIC ENERGY NANTONG Co.,Ltd. |
|
| CP03 | Change of name, title or address |