CN103532411A - Micro inverter topology - Google Patents
Micro inverter topology Download PDFInfo
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- CN103532411A CN103532411A CN201210231525.7A CN201210231525A CN103532411A CN 103532411 A CN103532411 A CN 103532411A CN 201210231525 A CN201210231525 A CN 201210231525A CN 103532411 A CN103532411 A CN 103532411A
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- China
- Prior art keywords
- reverse excitation
- road
- excitation circuit
- power switch
- inverter circuit
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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
Abstract
The invention discloses a micro inverter topology and belongs to the technical field of new energy. The topology is composed of two main parts. The first part is two groups of DC-DC transformation parts and adopts a fly-back interleaving parallel circuit, and a main tube adopts an active clamp technique to realize soft switching. The second part is a DC-AC transformation part, and an H bridge of the part realizes power frequency transformation.
Description
Technical field
What the present invention relates to is a Miniature inverter topological structure, belongs to technical field of new energies, the particularly miniature inversion transformation technique in parallel network power generation field.
Background technology
Grid-connected photovoltaic system comprises distributed photovoltaic power generation system and centralized photovoltaic generating system.Distributed photovoltaic power generation is for centralized photovoltaic generation, and centralized photovoltaic generation is first connected in series or in parallel by solar-energy photo-voltaic cell, and higher voltage and power is provided, then electric energy concentration of transmissions is arrived to the mode of electrical network by combining inverter; Distributed photovoltaic power generation refers to as each solar-energy photo-voltaic cell is equipped with separately a combining inverter and directly delivery of electrical energy is arrived to the mode of electrical network, inverter possesses maximal power tracing function simultaneously, with respect to centralized fashion, distributed photovoltaic power generation has that system extension is flexible, reliability is high, generating efficiency advantages of higher.
Miniature inverter is applied to photovoltaic parallel in system, corresponding every photovoltaic module is installed a Miniature inverter, allow like this one of every photovoltaic module Corresponding matching there is independently straight/alternating current transformation function and MPPT function, thereby effectively overcome the defect of centralized photovoltaic combining inverter, and it has advantages of ownly unique, become direction and the focus of photovoltaic combining inverter research and development.
The main circuit of Miniature inverter can be consulted the thesis for the doctorate of the Kjaer publishing for 2005, pp.51-52,4.3.2& 4.3.3 " Flyback converter with LF DC-AC inverter ".On this basis, the United States Patent (USP) 7 of 2009, the topology of the Miniature inverter that 796,412 " Method and apparatus for converting direct current to alternating current " have proposed a kind of " reduction voltage circuit leakage inductance energy absorbs, flyback is topological, mix H bridge circuit ".This patent, by adopting " the soft switch of active-clamp, flyback topology, mixing H bridge circuit ", has been realized the further lifting of the conversion efficiency of Miniature inverter.
Summary of the invention
A Miniature inverter topological structure of the present invention is comprised of two large divisions; First is two groups of DC-DC conversion fractions, and what this part adopted is inverse-excitation type crisscross parallel circuit, and supervisor adopts active-clamp technology to realize soft switch; Second portion is DC-AC conversion fraction, and the H bridge of this part is realized power frequency conversion.
The object of this invention is to provide a Miniature inverter topological structure, it is than existing inverter topology, and it improves energy conversion efficiency in highland as far as possible.After using active-clamp technology, transformer leakage inductance energy is absorbed and feeds back to DC bus, has eliminated the shutoff voltage spike that leakage inductance causes simultaneously, and power switch bears voltage stress and diminishes; Master power switch S
1and S
2, clamp switch SQA
1and SQA
2all realized soft switch; Make rectifier diode D
1and D
2cut-off current rate of change reduces, and has reduced rectifier diode D
1and D
2oppositely recover the turn-off power loss, switching noise and the master power switch S that cause
1and S
2current spike while opening.
Accompanying drawing explanation
Accompanying drawing 1 is the main circuit diagram of a Miniature inverter topological structure
Reference numeral
10-photovoltaic module; 20-first via active clamping circuir; 30-the second road active clamping circuir; 40-first via reverse excitation circuit; 50-the second road reverse excitation circuit; 60-mixing bridge circuit; C
infor input capacitance; C
a1for first via clamping capacitance; C
a2it is the second road clamping capacitance; T
1for the flyback transformer in first via reverse excitation circuit; T
2it is the flyback transformer in the second road reverse excitation circuit; N
p1former limit for the flyback transformer in first via reverse excitation circuit; N
s1secondary for the flyback transformer in first via reverse excitation circuit; N
p2it is the former limit of the flyback transformer in the second road reverse excitation circuit; N
s2it is the secondary of the flyback transformer in the second road reverse excitation circuit; S
1main switch for first via reverse excitation circuit; S
2it is the main switch of the second road reverse excitation circuit; SQA
1clamp switch for first via clamp circuit; SQA
2it is the clamp switch of the second road clamp circuit; D
1rectifier diode for first via reverse excitation circuit; D
2it is the rectifier diode of the second road reverse excitation circuit; L
ofor outputting inductance; C
ofor output capacitance.
Embodiment
Accompanying drawing 1 is the main circuit diagram of Miniature inverter topological structure of the present invention
Miniature inverter topological structure of the present invention comprises first via active clamping circuir 20; First via reverse excitation circuit 40; The second road active clamping circuir 30; The second road reverse excitation circuit 50.
Flyback transformer T in the positive terminal of photovoltaic module 10 and first via reverse excitation circuit 40
1former limit N
p1one end be connected, flyback transformer T
1former limit N
p1the other end and the master power switch S in first via reverse excitation circuit 40
1input be connected; Master power switch S in first via reverse excitation circuit 40
1input pass through C
a1with the clamp switch SQA in first via active clamping circuir 20
1be connected; Clamp switch SQA in first via active clamping circuir 20
1output be connected with the negative pole end of photovoltaic module 10; Master power switch S in first via reverse excitation circuit 40
1output be connected with the negative pole end of photovoltaic module 10; Flyback transformer T in first via reverse excitation circuit 40
1secondary N
s1one end by diode D
1with capacitor C
oand inductance L
oone end be connected; Capacitor C
othe other end and first via reverse excitation circuit 40 in flyback transformer T
1secondary N
s1the other end be connected; Inductance L
othe other end connect with the input that mixes bridge circuit 60.
Flyback transformer T in the positive terminal of photovoltaic module 10 and the second road reverse excitation circuit 50
2former limit N
p2one end be connected, flyback transformer T
2former limit N
p2the other end and the master power switch S in the second road reverse excitation circuit 50
2input be connected; Master power switch S in the second road reverse excitation circuit 50
2input pass through C
a2with the clamp switch SQA in the second road active clamping circuir 30
2be connected; Clamp switch SQA in the second road active clamping circuir 30
2output be connected with the negative pole end of photovoltaic module 10; Master power switch S in the second road reverse excitation circuit 50
2output be connected with the negative pole end of photovoltaic module 10; Flyback transformer T in the second road reverse excitation circuit 50
2secondary N
s2one end by diode D
2with capacitor C
oand inductance L
oone end be connected; Capacitor C
othe other end and the second road reverse excitation circuit 50 in flyback transformer T
2secondary N
s2the other end be connected; Inductance L
othe other end connect with the input that mixes bridge circuit 60.
Claims (7)
1. a Miniature inverter topological structure, comprises two groups of DC-DC translation circuits and DC-AC inverter circuit, it is characterized in that, described two groups of DC-DC translation circuits are isolated DC-DC translation circuit.
2. two groups of DC-DC translation circuits comprise first via reverse excitation circuit in parallel and the second road reverse excitation circuit according to claim 1, wherein said first via reverse excitation circuit comprises first via active clamping circuir, described the second road reverse excitation circuit comprises the second road active clamping circuir, and described DC-AC inverter circuit comprises H bridge inverter circuit.
3. first via reverse excitation circuit comprises first via active clamping circuir according to claim 1, and described first via active clamping circuir is realized soft switch.
4. the second road reverse excitation circuit comprises the second road active clamping circuir according to claim 1, and described the second road active clamping circuir is realized soft switch.
5. H bridge inverter circuit according to claim 2, is characterized in that:
Described H bridge inverter circuit comprises the first brachium pontis and the second brachium pontis being connected in parallel, wherein said the first brachium pontis comprise be connected in series first on power switch pipe and first time power switch pipe, described the second brachium pontis comprise be connected in series second on power switch pipe and second time power switch pipe.
6. the power switch pipe of H bridge inverter circuit according to claim 5, is characterized in that:
Described power switch pipe can be field effect transistor, also can be thyristor, or the combination of field effect transistor and thyristor.
7. H bridge inverter circuit according to claim 5, is characterized in that, described H bridge inverter circuit is realized power frequency conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231525.7A CN103532411A (en) | 2012-07-05 | 2012-07-05 | Micro inverter topology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210231525.7A CN103532411A (en) | 2012-07-05 | 2012-07-05 | Micro inverter topology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103532411A true CN103532411A (en) | 2014-01-22 |
Family
ID=49934168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210231525.7A Pending CN103532411A (en) | 2012-07-05 | 2012-07-05 | Micro inverter topology |
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| Country | Link |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124857A (en) * | 2014-08-05 | 2014-10-29 | 曹学良 | PWM dead zone absorption circuit for driver transformer |
| CN104796029A (en) * | 2015-01-27 | 2015-07-22 | 南通睿觅新能源科技有限公司 | Micro inverter applied to photovoltaic solar |
| CN105450032A (en) * | 2015-12-30 | 2016-03-30 | 广西师范大学 | Leakage inductance energy feedback digital control device for DC-DC converter |
| CN106787911A (en) * | 2017-02-14 | 2017-05-31 | 苏州大学 | A kind of miniature photovoltaic grid-connected inverter and control method |
| CN103956924B (en) * | 2014-04-23 | 2017-06-06 | 苏州微盛特变新能源科技有限公司 | The photovoltaic miniature inverter of double flyback resonance |
| CN107070272A (en) * | 2017-06-16 | 2017-08-18 | 江苏集能易新能源技术有限公司 | A kind of double line photovoltaic Miniature inverter circuit |
| CN109845080A (en) * | 2016-10-18 | 2019-06-04 | 罗伯特·博世有限公司 | Dc voltage changer and method for running dc voltage changer |
-
2012
- 2012-07-05 CN CN201210231525.7A patent/CN103532411A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956924B (en) * | 2014-04-23 | 2017-06-06 | 苏州微盛特变新能源科技有限公司 | The photovoltaic miniature inverter of double flyback resonance |
| CN104124857A (en) * | 2014-08-05 | 2014-10-29 | 曹学良 | PWM dead zone absorption circuit for driver transformer |
| CN104124857B (en) * | 2014-08-05 | 2017-12-12 | 曹学良 | PWM dead bands absorbing circuit for driving transformer |
| CN104796029A (en) * | 2015-01-27 | 2015-07-22 | 南通睿觅新能源科技有限公司 | Micro inverter applied to photovoltaic solar |
| CN105450032A (en) * | 2015-12-30 | 2016-03-30 | 广西师范大学 | Leakage inductance energy feedback digital control device for DC-DC converter |
| CN109845080A (en) * | 2016-10-18 | 2019-06-04 | 罗伯特·博世有限公司 | Dc voltage changer and method for running dc voltage changer |
| CN109845080B (en) * | 2016-10-18 | 2020-11-27 | 罗伯特·博世有限公司 | DC voltage converter and method for operating a DC voltage converter |
| CN106787911A (en) * | 2017-02-14 | 2017-05-31 | 苏州大学 | A kind of miniature photovoltaic grid-connected inverter and control method |
| CN107070272A (en) * | 2017-06-16 | 2017-08-18 | 江苏集能易新能源技术有限公司 | A kind of double line photovoltaic Miniature inverter circuit |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140122 |
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