CN110350816A - A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit - Google Patents

A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit Download PDF

Info

Publication number
CN110350816A
CN110350816A CN201910642799.7A CN201910642799A CN110350816A CN 110350816 A CN110350816 A CN 110350816A CN 201910642799 A CN201910642799 A CN 201910642799A CN 110350816 A CN110350816 A CN 110350816A
Authority
CN
China
Prior art keywords
power switch
energy storage
storage inductor
inverter
snubber circuit
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.)
Granted
Application number
CN201910642799.7A
Other languages
Chinese (zh)
Other versions
CN110350816B (en
Inventor
陈亦文
蔡高超
吴立华
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.)
Fuzhou University
Original Assignee
Fuzhou University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuzhou University filed Critical Fuzhou University
Priority to CN201910642799.7A priority Critical patent/CN110350816B/en
Publication of CN110350816A publication Critical patent/CN110350816A/en
Application granted granted Critical
Publication of CN110350816B publication Critical patent/CN110350816B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • H02J3/385Maximum power point tracking control for photovoltaic sources
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • H02M1/34Snubber circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66Regulating electric power
    • G05F1/67Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The present invention relates to power electronics fields, especially a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit, including successively cascade energy storage inductor, half-bridge converter and output filter, the energy storage inductor both ends parallel connection Active Snubber Circuit, the Active Snubber Circuit includes a buffering capacitor, two diodes and two full-control type power switch, and the half-bridge converter is mainly made of four full-control type power switch.The inverter can by unstable, low amplitude value, poor quality DC power conversion at stabilization, amplitude, good single-phase output sinusoidal ac, be suitable for boosting, Small And Medium Capacity single phase passive and parallel network reverse occasion.

Description

A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit
Technical field
The present invention relates to power electronics fields, and in particular to a kind of single-stage of energy storage inductor parallel connection Active Snubber Circuit Single-phase electricity flow pattern inverter.
Background technique
Inverter is using a kind of static ac dc converter device of the power semiconductor by DC power conversion at alternating current, for handing over Current load is used or is generated electricity by way of merging two or more grid systems with public electric wire net.
Due to the fossil energies such as petroleum, coal and natural gas (non-renewable energy resources) growing tension, environmental pollution is serious, the whole world It warms, nuclear energy production can generate reasons, the energy and the environment such as nuke rubbish and pollution environment and have become what the 21 century mankind were faced Significant problem.The renewable energy such as solar energy, wind energy, tide energy and geothermal energy (green energy resource) have cleanliness without any pollution, honest and clean Valence, it is reliable, abundant the advantages that, develop and utilize renewable energy and be increasingly valued by people, this is to countries in the world economy Sustainable development have considerable meaning.The renewable energy conversions such as solar energy, wind energy, Hydrogen Energy, tide energy, geothermal energy Direct current energy be usually it is unstable, need using inverter be converted into AC energy supply load use or and common electrical Net generates electricity by way of merging two or more grid systems.With dc generator, battery, solar battery, fuel cell, wind energy conversion system etc. for the inverse of main dc power supply Variable field is closed, and inverter is with a wide range of applications.
At present in the inversion occasion of Small And Medium Capacity, single-stage and-phase voltage-type (voltage-dropping type) inverter circuit knot is generallyd use Structure.This kind of inverter must satisfy the peak value that DC voltage is greater than exchange side phase voltage when working normally, therefore bright there are one Aobvious defect: when DC voltage (such as photovoltaic cell fan-out capability) reduces, such as rainy days or night, entire electricity generation system will It is out of service, the utilization rate decline of system.In this regard, solved the problems, such as frequently with the following two kinds method this-: (1) prime adds Boost type DC converter, thus constitute two stage power transformation circuit structure, increase circuit complexity, loss and at This;(2) output plus single phase industrial frequence transformer are particularly difficult to adapt to copper to considerably increase the volume of system, weight and cost Today that the iron prices of raw materials are risen sharply.
Therefore, it is extremely urgent to seek a kind of booster type single-phase inverter with single stage circuit structure.
Summary of the invention
The purpose of the present invention is to provide a kind of single-stage and-phase current mode inversions of energy storage inductor parallel connection Active Snubber Circuit Device, the inverter can by unstable, low amplitude value, poor quality DC power conversion at stabilization, amplitude, good single-phase output just String alternating current.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of energy storage inductor parallel connection Active Snubber Circuit Single-stage and-phase current source inverter, including successively cascade energy storage inductor, half-bridge converter and output filter, the energy storage electricity Feel both ends parallel connection Active Snubber Circuit, the Active Snubber Circuit includes a buffering capacitor, two diodes and two full controls Type power switch, the half-bridge converter are mainly made of four full-control type power switch.
Further, two full-control type power switch of the Active Snubber Circuit be able to bear bi-directional voltage stress and Two quadrant power switch of monophase current stress.
Further, two full-control type power switch of the Active Snubber Circuit be able to bear unidirectional voltage stress and Two quadrant power switch of bidirectional current stress.
Further, the Active Snubber Circuit includes the 5th power switchS 5, the 6th power switchS 6, the 5th diodeD 5, the 6th diodeD 6With buffering capacitorC b , the 5th power switchS 5Drain electrode, the 5th diodeD 5Cathode with buffering CapacitorC b One end be connected, the 6th power switchS 6Source electrode, the 6th diodeD 6Anode with buffering capacitorC b The other end It is connected, the 5th power switchS 5Source electrode and the 6th diodeD 6Cathode be connected, the 6th power switchS 6Drain electrode and the five or two Pole pipeD 5Anode be connected.
Further, the energy storage inductorLOne end and the 5th power switchS 5Source electrode, the 6th diodeD 6's Cathode is connected, the energy storage inductorLThe other end and the 6th power switchS 6Drain electrode, the 5th diodeD 5Anode phase Even.
The present invention " will sequentially cascade the traditional single stage single-phase electricity die mould constituted by half-bridge converter and single-phase LC filter (voltage-dropping type) inverter circuit structure " is changed to " by the energy storage inductor, half-bridge converter and output of both ends parallel connection Active Snubber Circuit Filter sequentially cascades single-stage and-phase current mode (booster type) circuit structure of composition ", it has been put forward for the first time energy storage inductor and has been parallel with The new concept and circuit structure of single-stage and-phase current mode (booster type) inverter of source buffer circuit, i.e., by input voltage sourceU i 、 Energy storage inductorLWith the first power switch of inverter bridgeS 1With third power switchS 3(or the second power switchS 2It is opened with the 4th power It closesS 4) constitute circuit of magnetizing;By input voltage sourceU i , energy storage inductorL、First power switch of inverter bridgeS 1It is opened with the 4th power It closesS 4(or the second power switchS 2With third power switchS 3), output filter and load constitute energy regenerative circuit;By energy storage electricity SenseL, the 5th diodeD 5, the 6th diodeD 6With buffering capacitorC b Constitute buffering capacitor charging circuit;By energy storage inductorL, the 5th Power switchS 5, the 6th power switchS 6With buffering capacitorC b Constitute buffering capacitor discharge loop.Pass through circuit and the energy regenerative time of magnetizing The voltage transformation of road realization inverter boost phase;The voltage of inverter buck stage is realized by charge circuit and energy regenerative circuit Transformation;Contravarianter voltage transformation and buffering capacitor excess energy release are realized by discharge loop and energy regenerative circuit.
It compared with prior art, the invention has the following advantages: can be by the direct current of unstable, low amplitude value, poor quality Electricity is transformed into stabilization, amplitude, good single-phase output sinusoidal ac, have the transformation of single-stage boost power, power density it is high, Conversion efficiency is high, the output waveform distortion factor is low, overload and high reliablity when short circuit, the advantages that lifetime of system is long, at low cost, is applicable in In boosting, Small And Medium Capacity single phase passive and parallel network reverse occasion, especially suitable for photovoltaic, wind generator system whole process luminous energy, wind It can be controlled using with MPPT maximum power point tracking.With the two-way appearance for blocking the new devices such as IGBT, this inverter is no longer Required series diode, solves the problems, such as the loss of series diode, more shows its unique advantage, has very strong practical Property and wide application prospect.
Detailed description of the invention
Fig. 1 is the circuit structure of the embodiment of the present invention.
Fig. 2 is that the single-stage and-phase current source inverter of the embodiment of the present invention is in energy storage inductor and magnetizes the equivalent electricity of mode Road.
Fig. 3 is that the single-stage and-phase current source inverter of the embodiment of the present invention is in the equivalent electricity of buffering capacitor electric discharge mode Road.
Fig. 4 is that the single-stage and-phase current source inverter of the embodiment of the present invention is in the equivalent electricity of buffering capacitor charging mode Road.
Fig. 5 is that the single-stage and-phase current source inverter of the embodiment of the present invention is in the equivalent of inverter bridge positive half cycle energy regenerative mode Circuit.
Fig. 6 is that the single-stage and-phase current source inverter of the embodiment of the present invention is in the equivalent of inverter bridge negative half period energy regenerative mode Circuit.
Fig. 7 is the circuit topology of the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention.
Fig. 8 is the circuit topology of the single-stage and-phase current source inverter second order CL filtering of the embodiment of the present invention.
Output voltage feedback control plan when Fig. 9 is the single-stage and-phase current source inverter off-network inversion of the embodiment of the present invention Slightly.
Principle waveform when Figure 10 is the single-stage and-phase current source inverter off-network inversion of the embodiment of the present invention.
Energy storage inductor magnetizes mode when Figure 11 is the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention Switch equivalent circuit.
Buffering capacitor electric discharge mode when Figure 12 is the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention Switch equivalent circuit.
Figure 13 buffers capacitor charging mode when being the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention Switch equivalent circuit.
Inverter bridge positive half cycle energy regenerative mould when Figure 14 is the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention The switch equivalent circuit of state.
Inverter bridge negative half period energy regenerative mould when Figure 15 is the single-stage and-phase current source inverter single order C filtering of the embodiment of the present invention The switch equivalent circuit of state.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is described in further details.
As shown in Figure 1, the present invention provides a kind of single-stage and-phase current mode of energy storage inductor parallel connection Active Snubber Circuit is inverse Become device, including successively cascade energy storage inductor, half-bridge converter and output filter, the energy storage inductor both ends are in parallel active slow Circuit is rushed, the Active Snubber Circuit includes a buffering capacitor, two diodes and two full-control type power switch, the list Phase inverter bridge is mainly made of four full-control type power switch.
Wherein, two full-control type power switch of the Active Snubber Circuit can be able to bear bi-directional voltage stress and Two quadrant power switch of monophase current stress, or be able to bear the two of unidirectional voltage stress and bidirectional current stress as Limit power switch.
In the present embodiment, the Active Snubber Circuit includes the 5th power switchS 5, the 6th power switchS 6, the five or two Pole pipeD 5, the 6th diodeD 6With buffering capacitorC b , the 5th power switchS 5Drain electrode, the 5th diodeD 5Cathode with Buffer capacitorC b One end be connected, the 6th power switchS 6Source electrode, the 6th diodeD 6Anode with buffering capacitorC b It is another One end is connected, the 5th power switchS 5Source electrode and the 6th diodeD 6Cathode be connected, the 6th power switchS 6Drain electrode and Five diodesD 5Anode be connected.The energy storage inductorLOne end and the 5th power switchS 5Source electrode, the 6th diodeD 6Cathode be connected, the energy storage inductorLThe other end and the 6th power switchS 6Drain electrode, the 5th diodeD 5Sun Extremely it is connected.
Present invention firstly provides single-stage and-phase current mode (booster type) inversions of energy storage inductor parallel connection Active Snubber Circuit The new concept and circuit structure of device, i.e., by input voltage sourceU i , energy storage inductorLWith the first power switch of inverter bridgeS 1And third Power switchS 3(or the second power switchS 2With the 4th power switchS 4) constitute circuit of magnetizing;By input voltage sourceU i , energy storage electricity SenseL、First power switch of inverter bridgeS 1With the 4th power switchS 4(or the second power switchS 2With third power switchS 3), Output filter and load constitute energy regenerative circuit;By energy storage inductorL, the 5th diodeD 5, the 6th diodeD 6With buffering capacitorC b Constitute buffering capacitor charging circuit;By energy storage inductorL, the 5th power switchS 5, the 6th power switchS 6With buffering capacitorC b Structure At buffering capacitor discharge loop.Pass through the voltage transformation in magnetize circuit and energy regenerative circuit realization inverter boost phase;By filling The voltage transformation of inverter buck stage is realized in electrical circuit and energy regenerative circuit;Inverter is realized by discharge loop and energy regenerative circuit Voltage transformation and buffering capacitor excess energy release.
In Fig. 1,U i For input direct-current voltage source, energy storage inductorLIt is converted for inversion boosting, in parallel active of energy storage inductor Buffer circuit (byD 5D 6S 5S 6WithC b Constitute) for buffering input direct-current voltage sourceU i , energy storage inductorLPower swing, with Achieve the purpose that system input, output energy balance in the entire low frequency output period;Single phase filter is defeated for filtering out inverter The high-frequency ripple components of side voltage, electric current out, to ensure the output waveform quality of inverter;Z L For the negative of inverter off-grid operation Impedance is carried,u n For the single phase ac power grid voltage of grid-connected inverters operation.
In the present embodiment, the single-stage and-phase current source inverter tool of energy storage inductor parallel connection Active Snubber Circuit of the invention There are five types of circuit mode and three kinds of operating modes, specific as follows:
There are energy storage inductors to magnetize mode, buffering capacitor electric discharge mode, buffering capacitor charging mode, inverter bridge just for the inverter Half cycle energy regenerative mode and inverter bridge negative half period energy regenerative mode totally five kinds of circuit mode, equivalent circuit is respectively such as Fig. 2,3,4,5,6 It is shown.
The inverter is in a low frequency output cycle memory in three kinds of operating modes, i.e. energy storage inductor current instantaneous valuei L Less than energy storage inductor current limit valueI L *, and buffer capacitance voltage instantaneous valueu Cb Less than buffering capacitance voltage limit valueU Cb *When, Inverter is in the boost mode that magnetizes;Energy storage inductor current instantaneous valuei L Less than energy storage inductor current limit valueI L *, and buffer electricity Hold instantaneous voltageu Cb Greater than buffering capacitance voltage limit valueU Cb *When, inverter is in electric discharge boost mode;Energy storage inductor electric current Instantaneous valuei L Greater than energy storage inductor current limit valueI L *When, inverter is in charging decompression mode.
Wherein, the inverter magnetizes boost mode are as follows: i L < I L *Andu Cb <U Cb *Each HF switch period in, Inverter works during DTs, byU i LAndS 1WithS 3(orS 2WithS 4) constitute circuit pairLThe energy storage inductor to magnetize fills Magnetic mode;During (1-D) Ts, byU i LAndS 1WithS 4(orS 2WithS 3) constitute circuit to load carry out energy regenerative inversion Positive (or negative) the half cycle energy regenerative mode of bridge.
Wherein, the inverter electric discharge boost mode are as follows: i L < I L *Andu Cb >U Cb *Each HF switch period in, Inverter works during DTs, byLC b AndS 5WithS 6The circuit pair of compositionCCarry out electric discharge and it is rightLThe buffering electricity to magnetize Discharge capacitor mode;During (1-D) Ts, byU i LAndS 1WithS 4(orS 2WithS 3) circuit that constitutes carries out energy regenerative to load Positive (or negative) the half cycle energy regenerative mode of inverter bridge.
Wherein, the inverter charging decompression mode are as follows: i L > I L *Each HF switch period in, inverter work Make during DTs, byLC b AndD 5WithD 6The circuit pair of compositionCCarry out charging and it is rightLCarry out the buffering capacitor charging mould of degaussing State;During (1-D) Ts, byU i LAndS 1WithS 4(orS 2WithS 3) constitute circuit to load carry out energy regenerative inverter bridge just (or negative) half cycle energy regenerative mode.
Above-mentioned three kinds of operating modes are all that energy storage inductor current inversion is modulated electric current at tri-state by half-bridge converteri m , The single-phase sinusoidal voltage of high quality is obtained in single phase ac load after single-phase filteringu n Or it is online in single-phase alternating current Obtain the single-phase simple sinusoidal alternating current of high qualityi n
The present invention solves traditional single stage single phase boost type PWM inverter energy storage inductor during decompression and can not release and can lead Therefore the problems such as causing magnetic saturation and output waveform to distort has single-stage boosting inverter, conversion efficiency height (means that energy damages Consume small), power density high (meaning that volume, weight are small), the advantages that input voltage range is wide, at low cost, application prospect is extensive, It is a kind of ideal energy-saving type single-phase inverter, new method is provided for the distributed power generation of renewable energy, energetically It advocates construction and has more important value energy-saving, conservation-minded society today.
In the present embodiment, the single phase filter is single order C filter or second order CL filter, is mainly used for filtering out inverse Become the current ripples of bridge outlet side.The case where being filtered using single order C, suitable for the inversion less high to output waveform quality requirement Occasion;The case where being filtered using second order CL, suitable for the inversion occasion high to output waveform quality requirement.The present embodiment also provides Filtered using single order C and using second order CL filtering two kinds of physical circuit topologys, as shown in Figure 7,8.
The inverter can be by a kind of unstable low-voltage DC (such as battery, photovoltaic cell, fuel cell, wind-force Machine etc.) it is transformed into required stabilization, high-quality, high pressure, single-phase sinusoidal ac, it is widely used in Small And Medium Capacity, boosting occasion Civilian industry inverter is (such as communication inverter and photovoltaic combining inverter 24VDC/220V50HzAC, 24VDC/ 110V60HzAC, 48VDC/220V50HzAC, 48VDC/110V60HzAC) and (the static change of such as aviation of national defense industry inverter Flow device 27VDC/115V400HzAC) etc..
The present invention can be using the off-network control strategy of output voltage feedback, and the cutting-in control plan of output current feedback Slightly.To use the single-stage and-phase current source inverter off-network of the energy storage inductor parallel connection Active Snubber Circuit of single order C filtering shown in Fig. 7 In case where work, output voltage feedback control strategy is as shown in figure 9, control principle waveform is as shown in Figure 10.
As shown in Figure 9, the single-stage and-phase current source inverter off-network work of the energy storage inductor parallel connection Active Snubber Circuit When, circuit is provided with the limit value of buffering capacitance voltageU Cb *, energy storage inductor current limit valueI L *With inverter output voltage benchmark Valueu ref , systematic sampling simultaneously feeds back buffering capacitance voltageu Cb , energy storage inductor electric currenti L And inverter output voltageu n , by appropriate Logical relation obtainS 1~S 6Driving signal, achieved the purpose that acquisition control principle waveform as shown in Figure 10.
According to the control strategy of Fig. 9, the single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit is normal When work there are energy storage inductor magnetize mode, buffering capacitor electric discharge mode, buffering capacitor charging mode, inverter bridge positive half cycle energy regenerative Mode and inverter bridge negative half period energy regenerative mode totally five kinds of circuit mode, switch equivalent circuit is respectively such as Figure 11,12,13,14,15 Shown, heavy line indicates the path of current flowing in figure.
Since the corresponding circuit working state of output voltage positive-negative half-cycle is symmetrically, to be exported here with inverter work Voltage positive half cycle isu n In case where > 0, inverter operation principle is introduced:
When the quantity of state in circuit meetsi L < I L *Andu Cb <U Cb *When, inverter work is in the DTs phase in each HF switch period Between energy storage inductor magnetize inverter bridge positive half cycle energy regenerative mode during mode, and (1-D) Ts, switch equivalent circuit is respectively as schemed 11, shown in 14.
When the quantity of state in circuit meetsi L < I L *Andu Cb >U Cb *When, inverter work exists in each HF switch period Inverter bridge positive half cycle energy regenerative mode, switch equivalent circuit are distinguished during buffering capacitor electric discharge mode, and (1-D) Ts during DTs As shown in Figure 12,14.
When the quantity of state in circuit meetsi L > I L *When, inverter work is delayed during DTs in each HF switch period Inverter bridge positive half cycle energy regenerative mode during capacitor charging mode, and (1-D) Ts is rushed, switch equivalent circuit is respectively such as Figure 13,14 It is shown.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.

Claims (5)

1. a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit, which is characterized in that including successively Cascade energy storage inductor, half-bridge converter and output filter, the energy storage inductor both ends parallel connection Active Snubber Circuit are described to have Source buffer circuit includes that a buffering capacitor, two diodes and two full-control type power switch, the half-bridge converter are main It is made of four full-control type power switch.
2. a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit according to claim 1, It is characterized in that, two full-control type power switch of the Active Snubber Circuit are to be able to bear bi-directional voltage stress and single-phase electricity Flow two quadrant power switch of stress.
3. a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit according to claim 1, It is characterized in that, two full-control type power switch of the Active Snubber Circuit are to be able to bear unidirectional voltage stress and two-way electricity Flow two quadrant power switch of stress.
4. a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit according to claim 1, It is characterized in that, the Active Snubber Circuit includes the 5th power switchS 5, the 6th power switchS 6, the 5th diodeD 5, the 6th DiodeD 6With buffering capacitorC b , the 5th power switchS 5Drain electrode, the 5th diodeD 5Cathode with buffering capacitorC b One end be connected, the 6th power switchS 6Source electrode, the 6th diodeD 6Anode with buffering capacitorC b The other end be connected, 5th power switchS 5Source electrode and the 6th diodeD 6Cathode be connected, the 6th power switchS 6Drain electrode and the 5th diodeD 5Anode be connected.
5. a kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit according to claim 4, It is characterized in that, the energy storage inductorLOne end and the 5th power switchS 5Source electrode, the 6th diodeD 6Cathode phase Even, the energy storage inductorLThe other end and the 6th power switchS 6Drain electrode, the 5th diodeD 5Anode be connected.
CN201910642799.7A 2019-07-16 2019-07-16 Single-stage single-phase current type inverter with energy storage inductor connected with active buffer circuit in parallel Active CN110350816B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910642799.7A CN110350816B (en) 2019-07-16 2019-07-16 Single-stage single-phase current type inverter with energy storage inductor connected with active buffer circuit in parallel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910642799.7A CN110350816B (en) 2019-07-16 2019-07-16 Single-stage single-phase current type inverter with energy storage inductor connected with active buffer circuit in parallel

Publications (2)

Publication Number Publication Date
CN110350816A true CN110350816A (en) 2019-10-18
CN110350816B CN110350816B (en) 2020-10-09

Family

ID=68174883

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910642799.7A Active CN110350816B (en) 2019-07-16 2019-07-16 Single-stage single-phase current type inverter with energy storage inductor connected with active buffer circuit in parallel

Country Status (1)

Country Link
CN (1) CN110350816B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112019080A (en) * 2020-08-25 2020-12-01 福州大学 Single-phase current type inverter containing LC active boost buffer network
CN113556030A (en) * 2021-07-19 2021-10-26 光华临港工程应用技术研发(上海)有限公司 Silicon carbide power semiconductor module device of integrated buffer circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101578756A (en) * 2007-01-12 2009-11-11 电力集成公司 Power converter with snubber
CN203691279U (en) * 2013-12-17 2014-07-02 哈尔滨九洲电气股份有限公司 Topologically structured circuit of mini photovoltaic inverter
CN104508966A (en) * 2012-07-30 2015-04-08 东洋电机制造株式会社 Power converter
CN109327158A (en) * 2018-09-30 2019-02-12 中南大学 A kind of current mode parallel network reverse device of integrated power decoupling and stepping functions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101578756A (en) * 2007-01-12 2009-11-11 电力集成公司 Power converter with snubber
CN104508966A (en) * 2012-07-30 2015-04-08 东洋电机制造株式会社 Power converter
CN203691279U (en) * 2013-12-17 2014-07-02 哈尔滨九洲电气股份有限公司 Topologically structured circuit of mini photovoltaic inverter
CN109327158A (en) * 2018-09-30 2019-02-12 中南大学 A kind of current mode parallel network reverse device of integrated power decoupling and stepping functions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
陈亦文等: ""单相电流型PWM逆变技术综述"", 《电源学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112019080A (en) * 2020-08-25 2020-12-01 福州大学 Single-phase current type inverter containing LC active boost buffer network
CN112019080B (en) * 2020-08-25 2021-12-28 福州大学 Single-phase current type inverter containing LC active boost buffer network
CN113556030A (en) * 2021-07-19 2021-10-26 光华临港工程应用技术研发(上海)有限公司 Silicon carbide power semiconductor module device of integrated buffer circuit

Also Published As

Publication number Publication date
CN110350816B (en) 2020-10-09

Similar Documents

Publication Publication Date Title
WO2019136576A1 (en) Series simultaneous power supply forward dc chopper-type single-stage multi-input high frequency link inverter
CN101615899B (en) Nonlinear pulse width modulation control device of single-phase current source grid-connected inverter
CN102158107B (en) Single-stage single-phase current type inverter with high step-up ratio
CN103855790A (en) Intelligent photovoltaic power generation system with energy storage function and control method of system
CN103036397B (en) Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source
CN105162350A (en) High-efficiency wide-load-range three-phase micro-inverter and control method thereof
CN108111045A (en) External Parallel Time-sharing selecting switch voltage-type single-stage multi input low frequency link inverter
CN109245589A (en) Three port integrated inverse device of single-stage three-phase high gain boost type
CN110350816A (en) A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit
CN108199597A (en) Single-stage three-phase voltage source inverter with cascade magnetic integrated switch L.C. network
CN107959435A (en) Power supply flyback cycle changing type single-stage multi input inverter while band energy storage device
CN103036398B (en) Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source
CN104158427B (en) Single-phase transless isolated form Z source photovoltaic combining inverter and modulator approach
CN102629836B (en) Novel two-stage alternating-current photovoltaic module
CN108616224A (en) A kind of single-phase seven electrical level inverter of booster type
CN105048854A (en) Three-phase non-isolated grid connection converter and air-conditioning system
CN102938620B (en) Single-stage three-phase cascade voltage-type quasi-impedance source inverter with large step-up ratio
CN102176643B (en) Single-stage three-phase current type inverter with large step-up ratio
CN205304268U (en) Crisscross parallelly connected type photovoltaic grid -connected inverter
CN108155780A (en) Single-stage and-phase voltage source converter with cascade magnetic integrated switch L.C. network
CN108206645A (en) Band energy storage device is powered flyback DC converting type quasi-single-stage multi input inverter simultaneously
CN102946209A (en) Single-stage three-phase large step-up ratio series voltage type quasi-impedance source inverter
CN204859103U (en) Novel photovoltaic power generation device based on cuk circuit
CN108199598A (en) Multiple coil time sharing power supply voltage-type single-stage multi input low frequency link inverter
CN112019080B (en) Single-phase current type inverter containing LC active boost buffer network

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant