CN106059485A - Photovoltaic micro inverter - Google Patents

Photovoltaic micro inverter Download PDF

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Publication number
CN106059485A
CN106059485A CN201610513386.5A CN201610513386A CN106059485A CN 106059485 A CN106059485 A CN 106059485A CN 201610513386 A CN201610513386 A CN 201610513386A CN 106059485 A CN106059485 A CN 106059485A
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CN
China
Prior art keywords
diode
switching tube
capacitance
converter
resonant
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.)
Pending
Application number
CN201610513386.5A
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Chinese (zh)
Inventor
王光波
周哲
邓占锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
North China Electric Power University
Global Energy Interconnection Research Institute
Original Assignee
State Grid Corp of China SGCC
North China Electric Power University
Global Energy Interconnection Research Institute
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Application filed by State Grid Corp of China SGCC, North China Electric Power University, Global Energy Interconnection Research Institute filed Critical State Grid Corp of China SGCC
Priority to CN201610513386.5A priority Critical patent/CN106059485A/en
Publication of CN106059485A publication Critical patent/CN106059485A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
    • H02J3/385—
    • 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
    • H02M1/00—Details of apparatus for conversion
    • 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • 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
    • 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

Provided in the invention is a photovoltaic micro inverter comprising a boost module and an inversion module. The boost module consists of a pre-stage DC-DC converter and post-stage DC-DC converter. A photovoltaic array, the pre-stage DC-DC converter, the post-stage DC-DC converter, and the inversion module are connected in series. The pre-stage DC-DC converter includes an input capacitor C1, a boost circuit, and an output capacitor C2; the input capacitor C1 and the boost circuit are connected in parallel; and the boost circuit and the output capacitor C2 are connected in parallel. According to the invention, with full utilization of the circuit characteristic of low switch losses and the high-frequency characteristic of the switch capacitor circuit, the size and output ripple of the filter can be reduced effectively.

Description

A kind of photovoltaic miniature inverter
Technical field
The invention belongs to electric and electronic technical field, a kind of photovoltaic miniature inverter.
Background technology
In recent years, photovoltaic miniature inverter increasingly received publicity with its exclusive advantage.It is a kind of and single light Photovoltaic assembly is connected, and can be directly converted to meet the inverter of grid-connected conditions alternating current by the unidirectional current that photovoltaic exports, and power is general Between 50～300W.Photovoltaic miniature inverter can be effectively prevented the power attenuation that local shades causes, by simplifying cloth Line reduces installation cost, utilizes separate framework to improve the global reliability of system.
Photovoltaic DC-to-AC converter can be divided into single step arrangement and two-layer configuration.The inverter of single stage type refers in a power link Realize the photovoltaic power changer of MPPT maximum power point tracking control, DC-AC inversion.It has simple in construction, inverter efficiency height Etc. advantage, but single stage type inverter to realize MPPT maximum power point tracking control and inversion grid connection control, control a power link Object processed is many and intercouples, and adds the design difficulty of controller.Although the inverter structure power progression of two-stage type is many, whole Engine efficiency is less than single stage type inverter, but its MPPT maximum power point tracking that can realize photovoltaic panel is individually controlled with grid-connected inverters System, it is to avoid the grid-connected inverters work impact on photovoltaic device output, the most more economic worth.
The output voltage of the photovoltaic cell of the most a lot of specifications is generally about 30V, and micro-inverter is accomplished by possessing high increasing The boost function of benefit, improves DC voltage to 310V, just can complete inversion grid connection.Common Boost circuit should in reality The step-up ratio of 5 times only up to be provided in, therefore cannot be applied individually to any Miniature inverter.And the topology that this patent is proposed Possessing the characteristic of high-gain, its power density is big simultaneously, and the Sofe Switch characteristic of resonant switch electric capacity is favorably improved efficiency, from The angle of boosting is highly suitable to be applied in Miniature inverter.But its modulation range is narrow, it is impossible to realize MPPT maximum power point tracking.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the present invention provides a kind of photovoltaic miniature inverter, by arranging boosting Module achieves the MPPT maximum power point tracking of photovoltaic cell, is improved by voltage simultaneously and is easy to direct inversion grid connection；And by arranging Inversion module realizes phase-locked control and DC voltage control, and inverse of the DC into AC is connected to the grid.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that:
The present invention provides a kind of photovoltaic miniature inverter, and inverter includes boost module and inversion module；Boost module bag Include preceding stage DC-DC changer and rear class DC-DC converter；Photovoltaic array (PV), preceding stage DC-DC changer, rear class DC-DC convert Device and inversion module are sequentially connected in series.
Preceding stage DC-DC changer includes input capacitance C1, Boost circuit and output capacitance C2；
Input capacitance C1In parallel with Boost circuit, Boost circuit and output capacitance C2In parallel.
Boost circuit includes boost inductance L1, switching tube Q1With diode D1；Switching tube Q1Use N-channel MOS FET；
Input capacitance C1With boost inductance L1It is connected and the input of institute's junction connection preceding stage DC-DC changer, boosting Inductance L1With switching tube Q1With input capacitance C after series connection1Parallel connection, diode D1Anode connecting valve pipe Q1Drain electrode, diode D1Negative electrode and output capacitance C2It is connected, switching tube Q1Source class and output capacitance C2It is connected.
Rear class DC-DC converter is resonant switch condenser network；
Rear class DC-DC converter includes switching tube Q2, switching tube Q3, resonant capacitance C1a, resonant capacitance C1b, resonant capacitance C1c, electric capacity of voltage regulation C2a, electric capacity of voltage regulation C2b, electric capacity of voltage regulation C2c, resonant inductance Lr, diode D1a, diode D2a, diode D1b、 Diode D2b, diode D1cAnd diode D2c；
Switching tube Q2With switching tube Q3All use N-channel MOS FET.
Switching tube Q2With switching tube Q3Series connection forms Q2-Q3Branch road, Q2-Q3Branch road and the input of rear class DC-DC converter Connect, switching tube Q2Drain electrode connect rear class DC-DC converter input anode, its source electrode connecting valve pipe Q3Drain electrode, open Close pipe Q3Source electrode connect rear class DC-DC converter input cathode；
Resonant inductance LrOne end connecting valve pipe Q2Source class, its one end is simultaneously connected with resonant capacitance C1a, resonant capacitance C1b With resonant capacitance C1c, diode D1aAnode and switching tube Q2Drain electrode connect, diode D1a, diode D2a, diode D1b、 Diode D2b, diode D1c, diode D2cIt is sequentially connected with, with electric capacity of voltage regulation C according to negative electrode after first anode2cAfter series connection again with Q2- Q3Branch circuit parallel connection；
Resonant capacitance C1aOne end and resonant inductance LrConnect, its other end and diode D1aNegative electrode connects；Resonant capacitance C1b One end and resonant inductance LrConnect, its other end and diode D1bNegative electrode connects；Resonant capacitance C1cOne end and resonant inductance LrEven Connect, its other end and diode D1cNegative electrode connects；
Electric capacity of voltage regulation C2aOne end and diode D2aNegative electrode connects, its other end and switching tube Q3Source electrode connect, voltage stabilizing electricity Hold C2bOne end and diode D2bNegative electrode connects, its other end and pipe Q3Source electrode connect.
Inversion module uses full bridge inverter.
Compared with prior art, the beneficial effects of the present invention is:
1), under Boost circuit operates in the pattern of discontinuous current mode, switching tube is operated under zero current turning-on state, opens Closing loss to reduce, the switching tube in resonant switch condenser network is operated in quasi-resonance state, and switching loss reduces；
2) make full use of the electric circuit characteristic that switching loss is little, play the high frequency characteristics of switched-capacitor circuit, can effectively reduce The volume of wave filter and output ripple；
3) preceding stage DC-DC changer uses Boost circuit to realize the lifting of MPPT maximum power point tracking and voltage, rear class DC- DC changer is responsible for further lifting voltage and is reached electrical network grade, step-up ratio more than achieve while 10 maximum power point with Track.
Accompanying drawing explanation
Fig. 1 is the structure chart of photovoltaic miniature inverter in the embodiment of the present invention；
Fig. 2 is preceding stage DC-DC converter topology structure chart in the embodiment of the present invention；
Fig. 3 is preceding stage DC-DC convertor controls signal and inductive current oscillogram in the embodiment of the present invention；
Fig. 4 is rear class DC-DC converter topology diagram in the embodiment of the present invention；
Fig. 5 is the working waveform figure of rear class DC-DC converter in the embodiment of the present invention；
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
The present invention provides a kind of photovoltaic miniature inverter, and such as Fig. 1, inverter includes boost module and inversion module；Boosting Module achieves the MPPT maximum power point tracking of photovoltaic cell, is improved by voltage simultaneously and is easy to direct inversion grid connection；Inversion module is real Existing phase-locked control and DC voltage control, inverse of the DC into AC is connected to the grid.
Boost module includes preceding stage DC-DC changer and rear class DC-DC converter；Photovoltaic array, preceding stage DC-DC convert Device, rear class DC-DC converter and inversion module are sequentially connected in series.
Such as Fig. 2, described preceding stage DC-DC changer includes input capacitance C1, Boost circuit and output capacitance C2；
Input capacitance C1In parallel with Boost circuit, Boost circuit and output capacitance C2In parallel.
Boost circuit includes boost inductance L1, switching tube Q1With diode D1；Switching tube Q1Use N-channel MOS FET；
Input capacitance C1With boost inductance L1It is connected and the input of institute's junction connection preceding stage DC-DC changer, boosting Inductance L1With switching tube Q1With input capacitance C after series connection1Parallel connection, diode D1Anode connecting valve pipe Q1Drain electrode, diode D1Negative electrode and output capacitance C2It is connected, switching tube Q1Source class and output capacitance C2It is connected.
Boost circuit, when switch controlled signal is timing, switching tube Q1Inductance electricity in the conduction state, that concatenated Stream is gradually increased；When switching tube signal is zero, switching tube Q1Being off state, the inductive current concatenated is with bigger speed Rate declines.The waveform of control signal and inductive current is as shown in Figure 3.It can be seen that the electric current of Boost circuit is continuous print.This Outward, switching tube Q1It is all zero current turning-on, reduces switching loss.
Rear class DC-DC converter is resonant switch condenser network；
Such as Fig. 4, rear class DC-DC converter includes switching tube Q2, switching tube Q3, resonant capacitance C1a, resonant capacitance C1b, resonance Electric capacity C1c, electric capacity of voltage regulation C2a, electric capacity of voltage regulation C2b, electric capacity of voltage regulation C2c, resonant inductance Lr, diode D1a, diode D2a, diode D1b, diode D2b, diode D1cAnd diode D2c；
Switching tube Q2With switching tube Q3All use N-channel MOS FET.
Switching tube Q2With switching tube Q3Series connection forms Q2-Q3Branch road, Q2-Q3Branch road and the input of rear class DC-DC converter Connect, switching tube Q2Drain electrode connect rear class DC-DC converter input anode, its source electrode connecting valve pipe Q3Drain electrode, open Close pipe Q3Source electrode connect rear class DC-DC converter input cathode；
Resonant inductance LrOne end connecting valve pipe Q2Source class, its one end is simultaneously connected with resonant capacitance C1a, resonant capacitance C1b With resonant capacitance C1c, diode D1aAnode and switching tube Q2Drain electrode connect, diode D1a, diode D2a, diode D1b、 Diode D2b, diode D1c, diode D2cIt is sequentially connected with, with electric capacity of voltage regulation C according to negative electrode after first anode2cAfter series connection again with Q2- Q3Branch circuit parallel connection；
Resonant capacitance C1aOne end and resonant inductance LrConnect, its other end and diode D1aNegative electrode connects；Resonant capacitance C1b One end and resonant inductance LrConnect, its other end and diode D1bNegative electrode connects；Resonant capacitance C1cOne end and resonant inductance LrEven Connect, its other end and diode D1cNegative electrode connects；
Electric capacity of voltage regulation C2aOne end and diode D2aNegative electrode connects, its other end and switching tube Q3Source electrode connect, voltage stabilizing electricity Hold C2bOne end and diode D2bNegative electrode connects, its other end and pipe Q3Source electrode connect.
It can make input voltage improve 4 times in theory.Meanwhile, this rear class DC-DC converter is by adding a resonance Inductance Lr, under specific switching frequency, utilize quasi-resonance soft switch effectively to inhibit switching loss.At switching tube Q2Or Q3Appoint Anticipating one when opening, due to the effect of resonant ring, switching tube achieves the mechanism of zero current turning-on.Reach maximum at resonance current It is gradually decrease to zero after peak value, forms reverse current, when making shutoff owing to the action current of diode will not continue to drop to negative value Electric current is zero it is achieved thereby that Sofe Switch, improves whole efficiency.
The switching device control signal of resonant switch capacitive transducer, flows through switching tube Q2、Q3With resonant inductance LrReason Think that current waveform is as shown in Figure 5.At switching tube Q3Service time t0Time, switching tube Q2Conducting, due to resonance, inductance flows through sine The electric current of form.At current cut-off time t1Time, electric current forward becomes 0, and due to the effect of diode, electric current no longer changes.With Rear on-off switching tube Q3, at upper pipe service time t2, switching tube Q2Conducting, inductance flows through the electric current of reverse sinusoidal form, at electricity Flow t reverse deadline3Time, inductive current becomes 0, and due to the effect of diode, electric current no longer changes.Switching tube Q subsequently2Close Closing, when down tube turns on again, the time is t4, repeat above work process.The electric current of inductance is at t0-t1Stage forward sine becomes Change, t1-t2Become 0, t2-t3Reversely sinusoidal variations, t3-t4Become 0.
Each working cycle of resonant switch capacitive transducer can be divided into 4 mode, specific as follows:
First mode (t0-t1):
t0Moment, Q3Conducting, Q2Turn off.ViWith D1a、C1aAnd LrConstitute loop, t0Moment starts to produce series resonance, electric current Start from scratch and be gradually increasing, and change sinusoidally, when current value reaches zero again, due to D1aObstruction, electric current is not Reversely can hereafter be maintained zero.Additionally, C2a、D1b、C1b、LrAnd Q3And C2b、D1c、C1c、LrAnd Q3The most all produce identical humorous Shake phenomenon.Therefore, at toMoment, Q3Realize zero current turning-on.Voltage pump rise aspect, ViTo C1aCharging, C2aTo C1bCharge to 2Vi, C2bTo C1cCharge to 3Vi, C2cPowering load.
Second mode (t1-t2):
Resonance is at t1Moment stops, and inductive current perseverance during this mode is zero, and two switching tubes are all in off state. Electric capacity C2cPowering load.
3rd mode (t2-t3):
t1Moment, Q2Conducting, Q3Turn off.ViWith D2a、C1a、C2aAnd LrConstitute loop, t2Moment starts to produce series resonance, Electric current is started from scratch and is gradually increasing, and changes sinusoidally, when current value is zero again, due to D2aObstruction, electric current Can not be reverse, hereafter it is maintained zero.Additionally, Vi、C1b、D2b、C2b、Lr、Q2Similar loop in series.ViAlso by Q1、Lr、 C1c、D2cBe cascaded generation resonance, powers to the load.Therefore, t2Moment Q3Achieve zero current turning-on.Voltage pump rise side Face, ViRespectively with C1a、C1b、C1cIt is cascaded, by C2a、C2b、C2cCharge to 2Vi、3Vi、4Vi。
4th mode (t3-t4):
Resonance is at t3Moment stops, and inductive current perseverance during this mode is zero, and two switching tubes are all in off state. Only electric capacity C2cPowering load again.
Sofe Switch in can the realizing from zero load to full-load range of this resonant switch capacitive transducer, but its phase The normal work of selection following two the to be met condition guarantee converter soft switch of related parameter.First, switching frequency should Less than resonant frequency, switch motion should be carried out after sinusoidal variations is zero at resonance current；Second, the voltage stricture of vagina of resonant capacitance Ripple should give restriction.
Inversion module uses full bridge inverter.Full bridge inverter includes four switching devices, and two groups are chained together Two switching tubes, be defined as first group and second group.First group of two switching tube centre position connects one end of exchange outlet side, Second group of two switching tube centre position connects the other end of exchange outlet side.First group of switching tube and second group of switching tube are the most also Connection, connects with direct current input.
Finally should be noted that: above example only in order to illustrate that technical scheme is not intended to limit, institute The those of ordinary skill in genus field still the detailed description of the invention of the present invention can be modified with reference to above-described embodiment or Equivalent, these are without departing from any amendment of spirit and scope of the invention or equivalent, all await the reply in application this Within bright claims.

Claims (5)

1. a photovoltaic miniature inverter, described inverter includes boost module and inversion module, it is characterised in that
Described boost module includes: preceding stage DC-DC changer and rear class DC-DC converter；
Photovoltaic array, preceding stage DC-DC changer, rear class DC-DC converter and inversion module are sequentially connected in series；
Described preceding stage DC-DC changer includes: input capacitance C1, Boost circuit and output capacitance C2；
Described input capacitance C1In parallel with described Boost circuit, described Boost circuit and described output capacitance C2In parallel.
Photovoltaic miniature inverter the most according to claim 1, it is characterised in that: described Boost circuit includes: boost inductance L1, switching tube Q1With diode D1；
Described input capacitance C1With described boost inductance L1Being connected, its junction connects the input of described preceding stage DC-DC changer End, described boost inductance L1With described switching tube Q1With described input capacitance C after series connection1Parallel connection, described diode D1Anode even Meet described switching tube Q1Drain electrode, described diode D1Negative electrode and described output capacitance C2It is connected, described switching tube Q1Source class With described output capacitance C2It is connected；
Described switching tube Q1Use N-channel MOS FET.
Photovoltaic miniature inverter the most according to claim 1, it is characterised in that: described rear class DC-DC converter is resonance Formula switched-capacitor circuit；
Described rear class DC-DC converter includes: switching tube Q2, switching tube Q3, resonant capacitance C1a, resonant capacitance C1b, resonant capacitance C1c, electric capacity of voltage regulation C2a, electric capacity of voltage regulation C2b, electric capacity of voltage regulation C2c, resonant inductance Lr, diode D1a, diode D2a, diode D1b、 Diode D2b, diode D1cAnd diode D2c；
Described switching tube Q2With switching tube Q3Use N-channel MOS FET.
Photovoltaic miniature inverter the most according to claim 3, it is characterised in that: described switching tube Q2With described switching tube Q3 Series connection forms Q2-Q3Branch road, described Q2-Q3Branch road connects with the input of described rear class DC-DC converter, described switching tube Q2's Drain electrode connects the input anode of described rear class DC-DC converter, and its source electrode connects described switching tube Q3Drain electrode, described switch Pipe Q3Source electrode connect described rear class DC-DC converter input cathode；
Described resonant inductance LrOne end connects described switching tube Q2Source class, its one end is simultaneously connected with described resonant capacitance C1a, described Resonant capacitance C1bWith described resonant capacitance C1c, described diode D1aAnode and described switching tube Q2Drain electrode connect, described two Pole pipe D1a, described diode D2a, described diode D1b, described diode D2b, described diode D1c, described diode D2cAccording to After first anode, negative electrode is sequentially connected with, with described electric capacity of voltage regulation C2cAfter series connection again with described Q2-Q3Branch circuit parallel connection；
Described resonant capacitance C1aOne end and described resonant inductance LrConnect, its other end and described diode D1aNegative electrode connects；Institute State resonant capacitance C1bOne end and described resonant inductance LrConnect, its other end and described diode D1bNegative electrode connects；Described resonance Electric capacity C1cOne end and described resonant inductance LrConnect, its other end and described diode D1cNegative electrode connects；
Described electric capacity of voltage regulation C2aOne end and described diode D2aNegative electrode connects, its other end and described switching tube Q3Source electrode even Connect, described electric capacity of voltage regulation C2bOne end and described diode D2bNegative electrode connects, its other end and described switching tube Q3Source electrode connect.
Photovoltaic miniature inverter the most according to claim 1, it is characterised in that: described inversion module uses full-bridge inverting electricity Road.
CN201610513386.5A 2016-06-30 2016-06-30 Photovoltaic micro inverter Pending CN106059485A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109842310A (en) * 2019-02-28 2019-06-04 全球能源互联网研究院有限公司 A kind of inverter
CN109842312A (en) * 2019-02-28 2019-06-04 全球能源互联网研究院有限公司 Inverter and its control method

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Publication number Priority date Publication date Assignee Title
CN101931337A (en) * 2010-09-09 2010-12-29 西安交通大学 Chopper inverter circuit for photovoltaic power generation and control method thereof
CN102447396A (en) * 2012-01-06 2012-05-09 无锡联动太阳能科技有限公司 Transformer with high set-up ratio, solar inverter and solar battery system
CN105048852A (en) * 2015-06-19 2015-11-11 江苏博纬新能源科技有限公司 Full-bridge Z-source inverter, control method thereof, and photovoltaic grid connected circuit
CN105207256A (en) * 2015-09-16 2015-12-30 国网智能电网研究院 Photovoltaic micro inverter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931337A (en) * 2010-09-09 2010-12-29 西安交通大学 Chopper inverter circuit for photovoltaic power generation and control method thereof
CN102447396A (en) * 2012-01-06 2012-05-09 无锡联动太阳能科技有限公司 Transformer with high set-up ratio, solar inverter and solar battery system
CN105048852A (en) * 2015-06-19 2015-11-11 江苏博纬新能源科技有限公司 Full-bridge Z-source inverter, control method thereof, and photovoltaic grid connected circuit
CN105207256A (en) * 2015-09-16 2015-12-30 国网智能电网研究院 Photovoltaic micro inverter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109842310A (en) * 2019-02-28 2019-06-04 全球能源互联网研究院有限公司 A kind of inverter
CN109842312A (en) * 2019-02-28 2019-06-04 全球能源互联网研究院有限公司 Inverter and its control method

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