WO2013163779A1 - Inverseur connecté au réseau photovoltaïque de retour multi-entrées - Google Patents

Inverseur connecté au réseau photovoltaïque de retour multi-entrées Download PDF

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Publication number
WO2013163779A1
WO2013163779A1 PCT/CN2012/000594 CN2012000594W WO2013163779A1 WO 2013163779 A1 WO2013163779 A1 WO 2013163779A1 CN 2012000594 W CN2012000594 W CN 2012000594W WO 2013163779 A1 WO2013163779 A1 WO 2013163779A1
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Prior art keywords
flyback
inverter
circuit
input
output
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PCT/CN2012/000594
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English (en)
Chinese (zh)
Inventor
高峰
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上海康威特吉能源技术有限公司
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Priority to PCT/CN2012/000594 priority Critical patent/WO2013163779A1/fr
Publication of WO2013163779A1 publication Critical patent/WO2013163779A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/001—Hot plugging or unplugging of load or power modules to or from power distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters
    • 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

Definitions

  • the invention belongs to the technical field of power electronic converters, and particularly relates to the technical field of power converters in the field of new energy power generation technologies, and particularly relates to a multi-input flyback photovoltaic grid-connected inverter. Background technique
  • Solar photovoltaic grid-connected power generation is the most important method for solar power generation applications.
  • Solar photovoltaic grid-connected power generation applications have the advantages of low cost and maintenance-free. According to statistics, more than 90% of photovoltaic power generation equipment installation capacity in the world is grid-connected.
  • the solar photovoltaic grid-connected power generation system can be classified into a centralized type, a string type, a multi-string type, and an AC module type according to the connection manner of the solar module and the grid-connected inverter.
  • the AC module integrates a grid-connected inverter with maximum power tracking (MPPT) for each PV module, ensuring that each PV module operates at its maximum power point, the system resists local shadowing and minimal electrical It has strong parameter matching ability, easy to expand, support plug and play and hot swap. The system is easy to repair and maintain, so it has become a hot spot of attention and research.
  • MPPT maximum power tracking
  • the flyback converter has gained more attention in the field of grid-connected inverters of AC modules due to its simple circuit structure, simple control, high reliability, low cost, suitable for medium and small power, such as Chinese patent CN1929276A.
  • "Exercise design of the current-source flyback inverter for decentralized grid-connected photovoltaic systems" [IEEE Transactions on Energy Conversion, vol. 23, no.l, 2008] A flyback photovoltaic grid-connected inverter is also proposed.
  • the power level of the traditional AC modular PV grid-connected inverter is correspondingly lower, but the corresponding control circuit of the PV grid-connected inverter needs to complete the MPPT control of the PV module at the same time.
  • the cost of this part of the circuit does not decrease with the reduction of the power level of the grid-connected inverter, resulting in the unit power generation of the AC modular photovoltaic grid-connected inverter
  • the power cost is significantly higher than the cost of grid-connected inverters in traditional centralized, string and multi-string grid-connected power generation systems, so to a large extent It limits the promotion and application of AC modular photovoltaic grid-connected power generation system; on the other hand, low-power photovoltaic grid-connected inverter also brings low energy conversion efficiency and large grid-connected current harmonics of grid-connected inverters. .
  • the present invention is directed to the deficiencies of the prior art, and provides a multi-input flyback photovoltaic grid-connected inverter having low cost, high efficiency, and small grid current harmonics.
  • a multi-input flyback photovoltaic grid-connected inverter the multi-input flyback photovoltaic grid-connected inverter comprises a plurality of photovoltaic modules, a plurality of flyback circuits, a clamp capacitor ( ⁇ .), an output filter circuit And an inverter circuit and a power grid; the number of the photovoltaic modules corresponds to the number of the flyback circuits;
  • the flyback circuit includes a positive input terminal, a negative input terminal, a clamp terminal terminal, a positive output terminal and a negative output terminal, and the positive and negative input terminals of each of the flyback circuits are respectively connected to the positive and negative output terminals of a photovoltaic module.
  • the negative input terminals of the plurality of flyback circuits are connected to each other and simultaneously connected to the negative polarity end of the clamp capacitor (c p ), and the clamp ends of the plurality of flyback circuits are connected to each other and simultaneously connected to the clamp a positive terminal of the bit capacitance (c p ); the output ends of the plurality of flyback circuits are connected in parallel, that is, the positive outputs of the plurality of flyback circuits are connected to each other, and the negative outputs are connected to each other;
  • the positive output terminal and the negative output terminal connected in parallel with the output terminal of the excitation circuit are respectively connected to the output filter circuit, and the output filter circuit is connected to the inverter circuit, and the inverter circuit is connected to the power grid.
  • the flyback circuit includes an input filter capacitor (c ⁇ ), a transformer (73 ⁇ 4, a main switch (&), a clamp switch, and a diode ⁇ 3 ⁇ 4).
  • the transformer comprises a primary winding (N and a secondary winding (N sA ), and the positive terminal of the input filter capacitor (c, réelle fc ) is respectively connected to the positive input terminal of the flyback circuit and the transformer (73 ⁇ 4 primary winding (N).
  • the transformer (r non-identical end of the primary winding is connected to the drain of the main switch (&) and the source of the auxiliary switch, the drain of the auxiliary bypass and the clamp end of the flyback circuit) ( ⁇ ) connected, the source of the main switch (&) is connected to the negative terminal of the input filter capacitor and the negative input of the flyback circuit respectively.
  • the anode of the diode is connected to the non-identical end of the secondary winding of the transformer, and the cathode of the diode is
  • the flyback circuit is connected at the positive output (o), and the transformer (73 ⁇ 4 secondary side)
  • the winding (the same name of N is connected to the negative output of the flyback circuit ( ⁇ -).
  • the output filter circuit is composed of an output filter capacitor (C.) and an output filter inductor.
  • the inverter circuit is composed of first, second, third, and fourth inverter switches 2 and S G2 .
  • One end of the output filter capacitor (C.) is simultaneously connected to a positive output terminal of one end of the output filter inductor (.) and the output terminal of the plurality of flyback circuits, and the other end of the output filter capacitor ( ) is simultaneously source connected to the negative output terminal of the plurality of the flyback circuit in parallel with the output terminal, a second inverter switch (2) source and a fourth switching transistor inverter 03 ⁇ 4 4) pole;
  • the output filter inductor ( The other end of the ::) is connected to the drain of the first inverter switch ( ⁇ S C1 ) and the drain of the third inverter switch ( 3 ), respectively, and the sources of the first inverter switch CS C1 ) a second inverter connected to the other end of the tube 2 switch) and the drain of the grid) is, 03 ⁇ 4 3) the source of the third switch transistor inverters are connected to the fourth inverter pole switch 03 ⁇ 4 4) and a drain grid One end.
  • the multi-input flyback photovoltaic grid-connected inverter provided by the invention can be connected to a plurality of photovoltaic modules simultaneously through a photovoltaic grid-connected inverter, and realize maximum power tracking of each photovoltaic component respectively. Maximizing the efficiency of power generation of photovoltaic modules;
  • a plurality of flyback circuits share an output filter circuit, a clamp capacitor, an inverter circuit, and a control circuit, which can greatly reduce system cost and reduce unit power generation. Power generation cost;
  • the multi-input flyback photovoltaic grid-connected inverter according to the present invention can greatly reduce grid-connected current harmonics and improve grid-connected current waveform quality
  • the multi-input flyback photovoltaic grid-connected inverter provided by the invention supports hot plugging of photovoltaic modules and flexible system expansion.
  • FIG. 1 is a schematic diagram of a multi-input flyback photovoltaic grid-connected inverter of the present invention
  • FIG. 2 is a schematic diagram of a flyback circuit in a multi-input flyback photovoltaic grid-connected inverter according to the present invention
  • FIG. 3 is a schematic diagram of a multi-input flyback photovoltaic grid-connected inverter according to the present invention, including two flybacks Schematic diagram of a multi-input flyback photovoltaic grid-connected inverter of a circuit
  • FIG. 4 is an embodiment of a multi-input flyback photovoltaic grid-connected inverter of the present invention: a working waveform diagram of a multi-input flyback photovoltaic grid-connected inverter including two flyback circuits;
  • Figure 5 is an embodiment of the multi-input flyback photovoltaic grid-connected inverter of the present invention - an equivalent schematic diagram of a multi-input flyback photovoltaic grid-connected inverter including two flyback circuits when the 2# photovoltaic module is cut .
  • ⁇ clamp capacitance C. An output filter capacitor; An output filter inductor; S GI , S G1 , S G2 , ⁇ S G4 — first, second, third, fourth inverter switch; wcr—grid; in2+, i”k+, z′ «N+ respectively 1# flyback circuit, 2# flyback circuit, ⁇ # flyback circuit, positive input terminal of N# flyback circuit; z' «l -, i"2-, inks inJV- respectively 1# flyback circuit, 2# flyback circuit, flyback circuit, negative input terminal of flyback circuit; cl-, c2- ck -, c N- are 1# flyback circuit, 2# flyback circuit, ⁇ # flyback circuit, N # clampback terminal of the flyback circuit; ol+, o 2+, o k+, o N+ are the positive output terminals of the ## flyback circuit, the 2# flyback circuit, the A# flyback
  • ⁇ , ⁇ 2 , ⁇ ⁇ are 1# flyback circuit, 2# flyback circuit, flyback circuit transformer;
  • N p ⁇ , N pl , N are 1# flyback circuit, 2# reverse Excitation circuit, excitation circuit transformer primary winding;
  • N s ⁇ , N s2 , N ⁇ are 1# flyback circuit, 2# flyback circuit, flyback circuit transformer secondary winding;
  • A, D 2 , A are 1 respectively # ⁇ , 2# flyback circuit, diode of flyback circuit;
  • u GS , , C52 are the drive signals of &, &respectively;
  • u Gsm , u GSG2
  • Di /3 ⁇ 4 current; is the current of the filter inductor ⁇ .
  • the technical solution of the present invention is to integrate a plurality of flyback photovoltaic grid-connected inverters, so that their power circuit parts are structurally connected to each other. Sharing, thereby reducing the cost of the power circuit, while integrating The latter circuit can share a set of control circuits, thereby greatly reducing the cost of the entire system.
  • the flyback circuit uses an active clamp flyback circuit, and each flyback circuit shares a clamp circuit. Combined with the corresponding control scheme, the soft switch of the main switch tube in the flyback circuit can be realized, thereby effectively improving the entire photovoltaic system. The conversion efficiency of the network inverter.
  • the multi-input flyback photovoltaic grid-connected inverter includes two or more photovoltaic modules, N flyback circuits, clamp capacitors (C p ), and output filtering as shown in FIG. 1 .
  • the flyback circuit of the present invention comprises a positive input terminal, a negative input terminal, a clamp terminal, a positive output terminal and a negative output terminal, wherein the positive and negative input terminals of each flyback circuit are respectively positive with a photovoltaic component.
  • the negative output is connected.
  • the negative inputs of all N flyback circuits are connected to each other and to the negative terminal of the clamp capacitor (C p ) at the same time; the clamp terminals of all N flyback circuits are connected to each other and connected to the clamp at the same time.
  • the outputs of all w flyback circuits are connected in parallel, that is, the positive outputs of all w flyback circuits are connected to each other and to the output filter capacitor (one end of 0 and one end of the output filter inductor (£.);
  • the negative outputs of the w flyback circuits are connected to each other and connected to the other end of the output filter capacitor (c:.), the source of the second inverter switch cs C2 ), and the fourth inverter switch cs C4.
  • the other ends of the output filter inductors ( ) are respectively connected to the drains of the first inverter switch tube and the drain of the third inverter switch tube 03 ⁇ 4 3 ), and the sources of the first inverter switch tube os cl ) are respectively connected to the first The drain of the inverter switch 03 ⁇ 4 2 ) and the end of the grid ( c ), the source of the third inverter switch (& 3 ) is connected to the drain and the grid of the fourth inverter switch 03 4 , respectively The other end.
  • the N flyback circuits in the present invention have exactly the same circuit structure, and any of them k flyback circuits are used to illustrate the circuit structure.
  • the schematic diagram of the circuit is shown in Figure 2.
  • Any kth flyback circuit includes input filter capacitors (C, Actually, transformer ( ), main switch (&), pliers. Bit switch tube 03 ⁇ 4 and diode 3 ⁇ 4).
  • the transformer (7) comprises a primary winding (N) and a secondary winding ( ⁇ ), and the positive terminal of the input filter capacitor is respectively connected to the positive input terminal of the flyback circuit and the transformer (the same name end of the primary winding of the 7)
  • the non-identical ends of the primary windings are respectively connected to the drain of the main switch (&) and the source of the auxiliary switch, and the drain of the auxiliary switch is connected to the clamp terminal ( ⁇ ) of the flyback circuit, the main switch
  • the source of the transistor 03 ⁇ 4) is respectively connected to the negative terminal of the input filter capacitor (C ⁇ ) and the negative input terminal of the flyback circuit, and the anode of the diode is connected to the non-identical end of the secondary winding of the transformer (7;), and the cathode of the diode
  • the positive output terminal of the flyback circuit is connected, and the secondary winding of the transformer (the same name end of N is connected to the negative output terminal ( ⁇ -) of the flyback circuit.
  • the main switch tube and the auxiliary switch tube in the flyback circuit are both high-frequency switching, and the inverter switch tube in the inverter circuit operates at a low frequency,
  • the operating frequency is equal to the frequency of the grid voltage.
  • the multi-input flyback photovoltaic grid-connected inverter uses two flyback circuits respectively connected to two photovoltaic modules, the schematic diagram of which is shown in FIG. 3:
  • All of the switching transistors use metal oxide semiconductor field effect transistors (MOSFETs), in which the switching frequency of the switching transistors in the flyback circuit varies from 80 kHz to 400 kHz, and the grid voltage frequency is 50 Hz, which is connected to each flyback circuit.
  • MOSFETs metal oxide semiconductor field effect transistors
  • the maximum output power of the PV module is 300W
  • the system power rating of the multi-input flyback PV grid-connected inverter is 600W.
  • the grid-connected inverter implements all control functions through a digital processor (DSP).
  • DSP digital processor
  • the multi-input flyback photovoltaic grid-connected inverter including two flyback circuits shown in FIG. 3 is respectively connected to the 1# photovoltaic component and the 2# photovoltaic component, and simultaneously realizes the MPPT of the output power of the two photovoltaic components, the system MPPT Control, phase-locked loop control, grid-connected current waveform control, islanding detection and protection control are all implemented by DSP.
  • the output of the MPPT controller provides the grid-connected power corresponding to the grid-connected power reference value of the PV module.
  • the output provides the electrical angle of the grid-connected current and the grid voltage amplitude.
  • the DSP adjusts the duty cycle of the main switch tube (&, &) of the flyback circuit in real time according to the grid-connected power and the grid voltage ( ⁇ ) electrical angle.
  • the envelope of the flyback circuit output current ( ⁇ , i D2 ) is a half-wave sinusoid, and the main switch tubes of the two flyback circuits (&, the drive signals are interlaced with each other,
  • the output current of the two flyback circuits ( D1 , high frequency superposition, the envelope is still half-wave sinusoidal, and the smoothed half-wave sinusoidal inductor current is obtained by the output filter circuit.
  • each flyback circuit works independently of each other but works in the same principle. All flyback circuits operate in a current interrupt mode, that is, a flyback circuit output current in each switching cycle. It can be naturally reduced to zero; after each main switching tube is turned off, the auxiliary switching tube is turned on, and the auxiliary switching tube is turned off before the output current of the flyback circuit is reduced to zero.
  • the effect is as follows: The clamp of the main off-tube shutdown voltage is realized, and the leakage energy of the transformer is recovered.
  • the multi-input flyback photovoltaic grid-connected inverter provided by the invention is connected to a plurality of photovoltaic components at the same time, but the working states of each photovoltaic component are independent of each other, and work on other photovoltaic components when a photovoltaic component is blocked from output power is reduced. The state will not have any effect. In particular, when a PV module is cut off due to failure or other reasons, it will not affect the working state of other PV modules.
  • the multi-input flyback photovoltaic grid-connected inverter of the flyback circuit is taken as an example. When the 2# photovoltaic module is cut off, the equivalent circuit of the photovoltaic grid-connected inverter is as shown in FIG. 5.

Abstract

La présente invention concerne un inverseur relié au réseau photovoltaïque de retour multi-entrées qui comprend plusieurs circuits de retour, plusieurs constituants photovoltaïques, un condensateur nivelé (Cp), un circuit de filtre de sortie, un circuit d'inverseur et un réseau électrique. Chaque circuit de retour comprend une extrémité d'entrée positive, une extrémité d'entrée négative, une extrémité nivelée, une extrémité de sortie positive et une extrémité de sortie négative. Les extrémités d'entrée positive et négative de chaque circuit de retour sont respectivement connectées aux extrémités de sortie positive et négative des constituants photovoltaïques. Les extrémités nivelées de tous les circuits de retour sont connectées à une extrémité du condensateur nivelé (Cp). Les extrémités de sortie de tous les circuits de retour sont connectées en parallèle et sont connectées au circuit de filtre de sortie. L'inverseur connecté au réseau photovoltaïque peut se connecter simultanément aux multiples constituants photovoltaïques; la poursuite de la puissance maximum de tous les constituants photovoltaïques étant mise en oeuvre au moyen d'un inverseur, tous les circuits de retour partageant le condensateur nivelé, le circuit de filtre de sortie et le circuit d'inverseur; ledit inverseur présentant l'avantage de coûts réduits, d'une grande efficacité dans la production d'électricité et un courant d'harmonique connecté au réseau réduit.
PCT/CN2012/000594 2012-05-02 2012-05-02 Inverseur connecté au réseau photovoltaïque de retour multi-entrées WO2013163779A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2012/000594 WO2013163779A1 (fr) 2012-05-02 2012-05-02 Inverseur connecté au réseau photovoltaïque de retour multi-entrées

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Application Number Priority Date Filing Date Title
PCT/CN2012/000594 WO2013163779A1 (fr) 2012-05-02 2012-05-02 Inverseur connecté au réseau photovoltaïque de retour multi-entrées

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CN104158220A (zh) * 2014-08-28 2014-11-19 哈尔滨工业大学 光伏并网逆变器虚拟电抗控制方法
CN104600750A (zh) * 2015-02-13 2015-05-06 河海大学 一种多输入全桥并网逆变器
CN110061523A (zh) * 2019-04-30 2019-07-26 武汉大学 一种新型拓扑结构的多功能单相并网逆变系统及方法
CN115995986A (zh) * 2023-03-24 2023-04-21 安徽微伏特电源科技有限公司 一种三角结构的串并联反激升压电路拓扑
CN116054619A (zh) * 2023-04-03 2023-05-02 安徽微伏特电源科技有限公司 一种耦合交错并联有源钳位反激式逆变器拓扑
CN117118257A (zh) * 2023-09-28 2023-11-24 广东技术师范大学 一种耦合电感双模式高效率光伏微型逆变器

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CN102624264A (zh) * 2011-01-30 2012-08-01 上海康威特吉能源技术有限公司 一种多输入反激式光伏并网逆变器

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CN1929276A (zh) * 2006-08-09 2007-03-14 哈尔滨工业大学 一种用于太阳能光伏并网发电的软开关反激逆变器
CN201813327U (zh) * 2010-09-16 2011-04-27 薛韬 蜂窝式光伏电站和用于蜂窝式光伏电站的节点逆变器
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104158220A (zh) * 2014-08-28 2014-11-19 哈尔滨工业大学 光伏并网逆变器虚拟电抗控制方法
CN104158220B (zh) * 2014-08-28 2016-04-06 哈尔滨工业大学 光伏并网逆变器虚拟电抗控制方法
CN104600750A (zh) * 2015-02-13 2015-05-06 河海大学 一种多输入全桥并网逆变器
CN110061523A (zh) * 2019-04-30 2019-07-26 武汉大学 一种新型拓扑结构的多功能单相并网逆变系统及方法
CN110061523B (zh) * 2019-04-30 2022-11-29 武汉大学 一种新型拓扑结构的多功能单相并网逆变系统及方法
CN115995986A (zh) * 2023-03-24 2023-04-21 安徽微伏特电源科技有限公司 一种三角结构的串并联反激升压电路拓扑
CN116054619A (zh) * 2023-04-03 2023-05-02 安徽微伏特电源科技有限公司 一种耦合交错并联有源钳位反激式逆变器拓扑
CN117118257A (zh) * 2023-09-28 2023-11-24 广东技术师范大学 一种耦合电感双模式高效率光伏微型逆变器
CN117118257B (zh) * 2023-09-28 2024-03-26 广东技术师范大学 一种耦合电感双模式高效率光伏微型逆变器

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