CN110198131A - It is a kind of can total power factor operation without the non-isolated inverter of switching loss type - Google Patents
It is a kind of can total power factor operation without the non-isolated inverter of switching loss type Download PDFInfo
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- CN110198131A CN110198131A CN201910489958.4A CN201910489958A CN110198131A CN 110198131 A CN110198131 A CN 110198131A CN 201910489958 A CN201910489958 A CN 201910489958A CN 110198131 A CN110198131 A CN 110198131A
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- power switch
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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion 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
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion 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
- H02M7/53—Conversion 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
- H02M7/537—Conversion 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
- H02M7/5387—Conversion 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
-
- 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
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion 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
- H02M7/4815—Resonant converters
- H02M7/4818—Resonant converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses it is a kind of can the operation of total power factor without the non-isolated inverter of switching loss type, which includes DC capacitor branch, high frequency main switch unit, resonant network and low frequency afterflow unit.The present invention cooperates switch control time sequence by the way that the resonant network that is formed by controlling switch, resonant capacitance, resonant inductance entirely is added, in network voltage with grid current with the phase stage, it can be achieved that master power switch pipe S1~S4, auxiliary switch S1a~S4aZero current turning-on and zero-current switching and auxiliary sustained diodea1No-voltage open and zero-current switching；Network voltage and grid current out-phase stage, auxiliary switch S may be implementeda1No-voltage open and zero voltage turn-off, auxiliary switch S1a~S4aWith master power switch pipe S1~S4Zero current turning-on and zero-current switching.The present invention realize non-isolated inverter high frequency and it is efficient simultaneously, so that it is possessed total power factor range of operation.
Description
Technical field
The present invention relates to it is a kind of can the operation of total power factor without the non-isolated inverter of switching loss type, belong to high-efficiency inversion
Device topologies field.
Background technique
Non-isolation type inverter possesses that circuit is simple, small in size, light-weight and high-efficient etc. advantages compared to isolated form structure.
By taking grid-connected application as an example, when inverter works in hard switching working method, at lower switching frequency (10~20kHz)
It can be only achieved the efficiency of customer satisfaction.The working frequency for improving inverter can reduce the volume, cost and weight of passive element, from
And realize the miniaturization of gird-connected inverter.But with the promotion of switching frequency, the switching loss of HF switch is significantly increased, and is utilized
Soft switch technique can reduce or even eliminate its switching loss,
The operational mode of gird-connected inverter is more complicated, can be divided into unity power factor and two kinds of non-unity power factor.
The Sofe Switch Non-isolated combining inverter constructed under only unity power factor operation is relatively easy to, and is had a large amount of patents and is generated, such as
104242716 A of patent CN, 104242719 A of patent CN, patent CN104753384A etc., these patented technologies are substantially mentioning
(up to hundred kH grades) while rising gird-connected inverter working frequency, higher conversion efficiency is maintained.With photovoltaic, wind-powered electricity generation equal distribution
Formula power grid is universal and accesses the raising of ratio, some international standards such as Germany's 4105 standard of VDE-AR-N and state, China
Family power grid Grid-connection standards GB/T 33593-2017 etc. requires that gird-connected inverter possesses broader power factor range of operation.But
It is that, if current soft switch technique framework runs on non-unity power factor state, original working sequence of resonant cavity will be destroyed,
So that the Sofe Switch condition of partial region is lost.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provide it is a kind of can the operation of total power factor without switching loss type it is non-every
From inverter and its switch control time sequence.The New Resonance network and its working sequence that the present invention constructs with adapt to grid-connected power because
Several variations makes inverter have idle fan-out capability while keeping Sofe Switch characteristic, to its power grid enabling capabilities of promotion
It is of great significance.
The present invention uses following technical scheme to solve above-mentioned technical problem:
The present invention provide it is a kind of can the operation of total power factor without the non-isolated inverter of switching loss type and its switch control
Timing, including DC capacitor branch, high frequency main switch unit, resonant network and low frequency afterflow unit；The routing of DC capacitor branch is straight
Galvanic electricity holds Cdc1Composition；
High frequency main switch unit is by the parallel combination of the first power switch tube and the first power diode, the second power switch
Pipe S2With the parallel combination and the 4th of the parallel combination of the second power diode, third power switch tube and third power diode
The parallel combination of power switch tube and the 4th power diode is constituted；
Resonant network is by the first auxiliary power switching tube and the parallel combination of the first auxiliary power diodes, the second auxiliary function
Rate switching tube and the parallel combination of the second auxiliary power diodes, third auxiliary power switching tube and third auxiliary power diodes
Parallel combination, the 4th auxiliary power switching tube and the 4th auxiliary power diodes parallel combination, the 5th auxiliary power switch
Pipe and the parallel combination of the 5th auxiliary power diodes, the first auxiliary resonance capacitor, the first auxiliary resonance inductance, the second auxiliary are humorous
Capacitor the second auxiliary resonance inductance that shakes is constituted；
Low frequency afterflow unit by the 5th power switch tube and the 5th power diode parallel combination, the 6th power switch tube
It is formed with the parallel combination of the 6th power diode；
First power switch tube, the second power switch tube, third power switch tube, the 4th power switch tube, the 5th
Power switch tube, the 6th power switch tube, the first auxiliary power switching tube, the second auxiliary power switching tube, third auxiliary power
Switching tube, the 4th auxiliary power switching tube, the 5th auxiliary power switching tube are wholly-controled device；
The anode of the DC capacitor is separately connected solar battery positive output end, the first power switch tube and third power
The collector of switching tube, the cathode of the first power diode and third power diode and the first auxiliary resonance capacitor it is negative
Pole；The negative terminal of DC capacitor is separately connected solar battery negative output terminal, the second power switch tube and the 4th power switch tube
The anode of emitter, the anode of the second power diode and the 4th power diode and the second auxiliary resonance capacitor；
The emitter of first power switch tube is switched with the anode of the first power diode, the first auxiliary power respectively
The emitter of pipe, the anode of the first auxiliary power diodes, the collector of the second power switch tube, the second power diode yin
Pole, the collector of the second auxiliary power switching tube, the cathode of the second auxiliary power diodes, the 5th power switch tube emitter
It is connected with the anode of the 5th power diode, and one end of the first network access filter inductance of connection；Third power switch tube
Emitter respectively with the anode of third power diode, the emitter of third auxiliary power switching tube, two pole of third auxiliary power
The anode of pipe, the collector of the 4th power switch tube, the cathode of the 4th power diode, the 4th auxiliary power switching tube current collection
Pole, the cathode of the 4th auxiliary power diodes, the emitter of the 6th power switch tube and the 6th power diode anode be connected
It connects, and one end of the second network access filter inductance of connection；
The current collection of the cathode of the collector of 5th power switch tube and the 5th power diode, the 6th power switch tube
Pole is connected with the cathode of the 6th power diode；
The collector of the first auxiliary power switching tube is assisted with the cathode of the first auxiliary power diodes, third respectively
The first end of the collector of power switch tube, the cathode of third auxiliary power diodes and the first auxiliary resonance inductance is connected；
The emitter of second auxiliary power switching tube respectively with the anode of the second auxiliary power diodes, the 4th auxiliary power switching tube
The first end of emitter, the anode of the 4th auxiliary power diodes and the second auxiliary resonance inductance is connected；
The anode of the first auxiliary resonance capacitor is switched with the second end of the first auxiliary resonance inductance, the 5th auxiliary power
The collector of pipe, the 5th auxiliary power diodes cathode be connected；The cathode of second auxiliary resonance capacitor and the second auxiliary are humorous
Vibration the second end of inductance, the emitter of the 5th auxiliary power switching tube, the 5th auxiliary power diodes anode be connected.
A kind of switch control time sequence based on the above-mentioned no non-isolated inverter of switching loss type, detailed process is as follows:
Region division is carried out using modulating wave zero crossing and reference current zero crossing as separation, each power frequency period is divided into
Four regions, the switch control time sequence in different zones are different；
Under inverter non-unity power factor operating condition, SPWM modulates wave phaseWith amplitude A ' and reference current phaseCorresponding relationship be respectively as follows:
Wherein, L is filter inductance value, and A is reference current amplitude, and ω is network voltage angular frequency, VpFor carrier amplitude, UPV
For inverter input direct-current voltage.
In modulating wave with reference current with phase and out-phase region, corresponding compensation rate is arranged to compensate for resonance to modulating wave
Influence of the network course of work to inverter output differential mode voltage；
Modulating wave positive half cycle, the first power switch and the 4th power switch are that main switch presses SPWM mode high frequency mo；
Modulating wave negative half period, the second power switch and third power switch are that main switch presses SPWM mode high frequency mo.Each region
Specific switch control time sequence is as follows:
In the region that modulating wave is positive and reference current is positive, the first power switch tube and the 4th power switch tube have phase
Same driver' s timing, and press SPWM mode high frequency mo；First auxiliary power switching tube and the 4th auxiliary power switching tube have
Identical driver' s timing is simultaneously pressed and the first power switch tube and the quasi- complementary mode high frequency mo of the 4th power switch tube, Er Qie
The conducting incipient stage of one auxiliary switch and the conducting end stage of the first power switch tube have crossover region, the 4th auxiliary switch
Conducting end stage and conducting incipient stage of the 4th power switch tube have crossover region；
In the region that modulating wave is negative and reference current is negative, the second power switch tube and third power switch tube have phase
Same driver' s timing, and press SPWM mode high frequency mo；Second auxiliary power switching tube and third auxiliary power switching tube have
Identical driver' s timing is simultaneously pressed and the second power switch tube and the quasi- complementary mode high frequency mo of third power switch tube, Er Qie
The conducting incipient stage of two auxiliary switches and the conducting end stage of the second power switch tube have crossover region, third auxiliary switch
There is crossover region in the conducting incipient stage of conducting end stage and third power switch tube；
In the region that modulating wave is positive and reference current is negative, the first power switch tube and the 4th power switch tube have phase
Same driver' s timing, and press SPWM mode high frequency mo；First auxiliary power switching tube and the 4th auxiliary power switching tube have
Identical driver' s timing is opened and lags behind opening the moment for the first power switch tube constantly, and the shutdown moment opens with the first power
The shutdown moment for closing pipe is identical；5th auxiliary power switching tube is by complementary with the first power switch tube and the 4th power switch tube
Mode high frequency mo；
In the region that modulating wave is negative and reference current is positive, the second power switch tube and third power switch tube have phase
Same driver' s timing, and press SPWM mode high frequency mo；Second auxiliary power switching tube and third auxiliary power switching tube have
Identical driver' s timing is opened and lags behind opening the moment for the second power switch tube constantly, and the shutdown moment opens with the second power
The shutdown moment for closing pipe is identical；5th auxiliary power switching tube is by complementary with the second power switch tube and third power switch tube
Mode high frequency mo.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
The present invention is by being added two groups by controlling the resonant network and full control that switch, resonant capacitance and resonant inductance form entirely
The auxiliary branch constituted is switched, cooperates above-mentioned switch control time sequence, it can be achieved that operation of the inverter within the scope of total power factor；
In network voltage with grid current with the phase stage, it can be achieved that master power switch pipe S1~S4Zero current turning-on and zero-current switching,
Auxiliary switch S1a~S4aZero current turning-on and zero-current switching, and realize auxiliary sustained diodea1No-voltage open
Logical and zero-current switching；Network voltage and grid current out-phase stage, auxiliary switch S may be implementeda1No-voltage open and
Zero voltage turn-off, auxiliary switch S1a~S4aZero current turning-on and zero-current switching, and realize power switch tube S1~S4
Zero current turning-on and zero-current switching.The present invention realize non-isolated inverter high frequency and it is efficient simultaneously, gather around it
There is total power factor range of operation.
Detailed description of the invention
Fig. 1 is the main circuit schematic diagram that the embodiment of the present invention one provides.
Fig. 2 (a) is the driving signal timing that the embodiment of the present invention one provides, and Fig. 2 (b) is modulation wave phaseWith reference electricity
Flow phaseRelation curve, Fig. 2 (c) be the present invention modulating wave be positive and reference current be positive region in the HF switch period
The theoretical work waveform diagram of scale, Fig. 2 (d) are that the present invention is positive in modulating wave and reference current is HF switch week in negative region
The theoretical work waveform diagram of phase scale.
Fig. 3 (a) to Fig. 3 (i) is the high frequency in the region that modulating wave is positive and reference current is positive of the embodiment of the present invention one
The equivalent operation modal graph of switch periods scale, wherein Fig. 3 (a) is the schematic diagram of mode 1；Fig. 3 (b) is the signal of mode 2
Figure；Fig. 3 (c) is the schematic diagram of mode 3；Fig. 3 (d) is the schematic diagram of mode 4；Fig. 3 (e) is the schematic diagram of mode 5；Fig. 3 (f) is
The schematic diagram of mode 6；Fig. 3 (g) is the schematic diagram of mode 7；Fig. 3 (h) is the schematic diagram of mode 8；Fig. 3 (i) is the signal of mode 9
Figure.
Fig. 4 is the operating wave for the region interior resonance network that modulating wave is positive in the embodiment of the present invention one and reference current is positive
Shape figure.
Fig. 5 (a) to Fig. 5 (c) is main in modulating wave is positive in the embodiment of the present invention one and reference current is positive region
The working waveform figure of power device, wherein Fig. 5 (a) main switch S1And S4Work wave；Fig. 5 (b) auxiliary switch S1aAnd S4a's
Work wave；Fig. 5 (c) assists sustained diodea1Work wave.
Fig. 6 (a) to Fig. 6 (i) is the high frequency in the region that modulating wave is positive and reference current is negative of the embodiment of the present invention one
The equivalent operation modal graph of switch periods scale, wherein Fig. 6 (a) is the schematic diagram of mode 1；Fig. 6 (b) is the signal of mode 2
Figure；Fig. 6 (c) is the schematic diagram of mode 3；Fig. 6 (d) is the schematic diagram of mode 4.Fig. 6 (e) is the schematic diagram of mode 5；Fig. 6 (f) is
The schematic diagram of mode 6；Fig. 6 (g) is the schematic diagram of mode 7；Fig. 6 (h) is the schematic diagram of mode 8；Fig. 6 (i) is the signal of mode 9
Figure.
Fig. 7 is the operating wave for the region interior resonance network that modulating wave is positive in the embodiment of the present invention one and reference current is negative
Shape figure.
Fig. 8 (a) to Fig. 8 (c) is that modulating wave is positive in the embodiment of the present invention one and reference current is main function in negative region
The working waveform figure of rate device, wherein Fig. 8 (a) auxiliary switch Sa1Work wave；Fig. 8 (b) auxiliary switch S1aAnd S4aWork
Make waveform；Fig. 8 (c) main switch S1And S4Work wave.
Fig. 9 (a) is network voltage and grid current waveform under non-unity power factor (electric current is advanced) operating condition, Fig. 9
It (b) is network voltage and grid current waveform under unity power factor operating condition, Fig. 9 (c) is non-unity power factor (electric current
Lag) network voltage and grid current waveform under operating condition.
Figure 10 is the circuit structure diagram that common-mode voltage clamp branch is added based on the present invention.
Figure 11 is to be applied to the circuit structure diagram that H5 topology obtains based on the present invention.
Figure 12 is to be applied to the circuit structure diagram that I topology of H6- obtains based on the present invention.
Figure 13 is the circuit structure diagram that the present invention is applied to that II topology of H6- obtains.
Wherein: Cdc1、Cdc2--- DC capacitor；S1~S4、S1a~S4a、S1b~S4b--- power switch tube and driving letter
Number；D1~D4--- power diode；Da1、Da2--- auxiliary afterflow lamp power diode；Grid,ug--- network voltage；
Upv--- solar panel output voltage；L1、L2--- network access filter inductance；C1--- network access filter capacitor；ig--- network access
Electric current；--- power-factor angle；um--- modulating wave.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, invent it is a kind of can the operation of total power factor without the non-isolated inverter of switching loss type by two groups
Resonant network realizes network voltage and the same phase of grid current and out-phase region power device under different capacity factor operating condition
Open the softening of turn off process, with weaken hard switching generation switching loss and electromagnetic interference the problems such as.
Embodiment 1:
Fig. 1 describes the constituted mode (each power switch tube is all made of common IGBT) of one main circuit of the embodiment of the present invention,
By DC capacitor CdcForm DC capacitor branch 1.
By the first power switch tube S1With the first power diode D1Parallel combination, the second power switch tube S2With second
Power diode D2Parallel combination, third power switch tube S3With third power diode D3Parallel combination and the 4th power
Switching tube S4With the 4th power diode D4Parallel combination constitute high frequency main switch unit 2.
By the first auxiliary power switching tube S1aWith the first auxiliary power diodes D1aParallel combination, the second auxiliary power
Switching tube S2aWith the second auxiliary power diodes D2aParallel combination, third auxiliary power switching tube S3aWith third auxiliary power
Diode D3aParallel combination, the 4th auxiliary power switching tube S4aWith the 4th auxiliary power diodes D4aParallel combination, the 5th
Auxiliary power switching tube Sa1With the 5th auxiliary power diodes Da1Parallel combination, the first auxiliary resonance capacitor C1a, first auxiliary
Resonant inductance L1a, the second auxiliary resonance capacitor C2a, the second auxiliary resonance inductance L2aConstitute resonant network 3.
By the 5th power switch tube S5With the 5th power diode D5Parallel combination, the 6th power switch tube S6With the 6th
Power diode D6Parallel combination form low frequency afterflow unit.
Fig. 2 (a) is the driving signal timing of the embodiment of the present invention one, is with modulating wave zero crossing and reference current zero crossing
Each power frequency period is divided into four regions by separation, and the switch control time sequence in different zones is different；
Under inverter non-unity power factor operating condition, SPWM modulates wave phaseWith amplitude A ' and reference current phaseCorresponding relationship be respectively as follows:
Wherein, L is filter inductance value, and A is reference current amplitude, and ω is network voltage angular frequency, VpFor carrier amplitude, UPV
For inverter input direct-current voltage.
In modulating wave and reference current with mutually and out-phase region in Fig. 2 (a), to modulating wave be arranged corresponding compensation rate with
Compensate for influence of the resonant network course of work to inverter output differential mode voltage.
Modulating wave positive half cycle, the first power switch S1With the 4th power switch S4It is dynamic by SPWM mode high frequency for main switch
Make；Modulating wave negative half period, the second power switch S2With third power switch S3SPWM mode high frequency mo is pressed for main switch.Respectively
The specific switch control time sequence in region is as follows:
In the region that modulating wave is positive and reference current is positive, the first power switch tube S1With the 4th power switch tube S4Tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；First auxiliary power switching tube S1aIt is switched with the 4th auxiliary power
Pipe S4aDriver' s timing having the same is simultaneously pressed and the first power switch tube S1With the 4th power switch tube S4Quasi- complementary mode is high
Frequency acts, and the first auxiliary switch S1aThe conducting incipient stage and the first power switch tube S1Conducting end stage have it is overlapping
Area, the 4th auxiliary switch S4aConducting end stage and the 4th power switch tube S4The conducting incipient stage have crossover region；
In the region that modulating wave is negative and reference current is negative, the second power switch tube S2With third power switch tube S3Tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；Second auxiliary power switching tube S2aIt is switched with third auxiliary power
Pipe S3aDriver' s timing having the same is simultaneously pressed and the second power switch tube S2With third power switch tube S3Quasi- complementary mode is high
Frequency acts, and the second auxiliary switch S2aThe conducting incipient stage and the second power switch tube S2Conducting end stage have it is overlapping
Area, third auxiliary switch S3aConducting end stage and third power switch tube S3The conducting incipient stage have crossover region；
In the region that modulating wave is positive and reference current is negative, the first power switch tube S1With the 4th power switch tube S4Tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；First auxiliary power switching tube S1aIt is switched with the 4th auxiliary power
Pipe S4aDriver' s timing having the same is opened and lags behind the first power switch tube S constantly1Open the moment, shutdown the moment with
First power switch tube S1The shutdown moment it is identical；5th auxiliary power switching tube Sa1By with the first power switch tube S1With the 4th
Power switch tube S4Complementary mode high frequency mo；
In the region that modulating wave is negative and reference current is positive, the second power switch tube S2With third power switch tube S3Tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；Second auxiliary power switching tube S2aIt is switched with third auxiliary power
Pipe S3aDriver' s timing having the same is opened and lags behind the second power switch tube S constantly2Open the moment, shutdown the moment with
Second power switch tube S2The shutdown moment it is identical；5th auxiliary power switching tube Sa1By with the second power switch tube S2And third
Power switch tube S3Complementary mode high frequency mo.
Fig. 3 (a) to Fig. 3 (i) is that the high frequency in the region that modulating wave is positive and reference current is positive of the embodiment of the present invention 1 is opened
Close the equivalent operation modal graph of period scale.Fig. 6 (a) to Fig. 6 (i) is in the region that modulating wave is positive and reference current is negative
The equivalent operation modal graph of HF switch period scale.
One specific example of the present embodiment 1 is as follows: cell plate voltage Upv=360V, network voltage ug=220VRMS, electricity
Net frequency fg=50Hz, rated power PN=3kW, dc-link capacitance Cdc1=Cdc2=470 μ F；Filter inductance L1=L2=
0.5mH；Filter capacitor C1=4.7 μ F；Solar panel parasitic capacitance C over the groundpv1=Cpv2=0.15 μ F；Switching frequency f=50kHz,
Resonant parameter Lr=2.2 μ H, Cr=47nF.
Fig. 4 is the operating wave for the region interior resonance network that modulating wave is positive in the embodiment of the present invention 1 and reference current is positive
Shape figure.
Fig. 5 (a) to Fig. 5 (c) is main function in modulating wave is positive in the embodiment of the present invention 1 and reference current is positive region
The working waveform figure of rate device, wherein Fig. 5 (a) main switch S1And S4Work wave；Fig. 5 (b) auxiliary switch S1aAnd S4aWork
Make waveform；Fig. 5 (c) assists sustained diodea1Work wave.
Fig. 7 is the operating wave for the region interior resonance network that modulating wave is positive in the embodiment of the present invention 1 and reference current is negative
Shape figure.
Fig. 8 (a) to Fig. 8 (c) is main function in modulating wave is positive in the embodiment of the present invention 1 and reference current is negative region
The working waveform figure of rate device, wherein Fig. 8 (a) auxiliary switch Sa1Work wave；Fig. 8 (b) auxiliary switch S1aAnd S4aWork
Make waveform；Fig. 8 (c) main switch S1And S4Work wave.
It is consistent with the theoretical work waveform in Fig. 2 (c) from being known in simulation waveform all in Fig. 4 and Fig. 5, it is of the invention
Realize master power switch pipe S1~S4Zero current turning-on and zero-current switching, auxiliary switch S1a~S4aZero current turning-on
And zero-current switching, and realize auxiliary sustained diodea1No-voltage open and zero-current switching；
It is consistent with the theoretical work waveform in Fig. 2 (d) from being known in simulation waveform all in Fig. 7 and Fig. 8, it is of the invention
Realize auxiliary switch Sa1No-voltage open and zero voltage turn-off, auxiliary switch S1a~S4aZero current turning-on and zero
Switch off current, and realize power switch tube S1~S4Zero current turning-on and zero-current switching.
Fig. 9 be in the embodiment of the present invention 1 under unity power factor and non-unity power factor operating condition network voltage and
Grid current waveform.The present invention makes photovoltaic combining inverter have broader power factor range of operation.
Embodiment 2:
Figure 10 is the circuit structure diagram of addition common-mode voltage clamp branch on the basis of the embodiment of the present invention 1, in capacitor branch
Road increases a capacitor Cdc2With capacitor Cdc1Series connection, increases power switch tube S in subsidiary loopa2With diode Da2's
Parallel combination, increased capacitor Cdc2Cathode connection solar battery cathode, capacitor Cdc1Cathode connect power switch tube
Sa1Emitter and power diode Da1Anode, increased power switch tube Sa2Emitter and power diode Da2Sun
Pole connects the second auxiliary resonance inductance L2aSecond end；So as to realize that freewheeling period common-mode voltage is clamped to input voltage
Half guarantees to eliminate leakage current.
Embodiment 3:
Figure 11 is to be applied to the circuit structure diagram that H5 topology obtains based on the present invention.Wherein, the 5th power switch tube S5And
5th power diode D5It is connected to bridge arm power switch tube on DC bus anode and inverter.5th power switch tube S5's
Collector connects DC capacitor Cdc1Anode and the 5th power diode D5Cathode；5th power switch tube S5Emitter connect
Meet the 5th power diode D5Anode and the first power switch tube S1, third power switch tube S3Collector.
Embodiment 4:
Figure 12 is to be applied to the circuit structure diagram that I topology of H6- obtains based on the present invention.Wherein, the 5th power switch tube S5
And the 5th power diode D5It is connected to bridge arm power switch tube on DC bus anode and inverter；6th power switch tube S6
And the 6th power diode D6It is connected to DC bus negative terminal and inverter lower bridge arm power switch tube.5th power switch tube S5
Collector connect DC capacitor Cdc1Anode and the 5th power diode D5Cathode；5th power switch tube S5Emitter
Connect the 5th power diode D5Anode and the first power switch tube S1, third power switch tube S3Collector.6th power
Switching tube S6Emitter connect DC capacitor Cdc2Negative terminal and the 6th power diode D6Anode；6th power switch tube S6
Collector connect the 6th power diode D6Cathode and the second power switch tube S2, the 4th power switch tube S4Emitter.
Embodiment 5:
Figure 13 is the circuit structure diagram that the present invention is applied to that II topology of H6- obtains.5th power switch tube S5And the 5th function
Rate diode D5With the first power switch tube S1, the second power switch tube S2Positioned at same bridge arm, and S5Collector connects the first function
Rate switching tube S1Emitter, S5Emitter connects the second power switch tube S2Collector.6th power switch tube S6And the 6th power
Diode D6With third power switch tube S3, the 4th power switch tube S4Positioned at same bridge arm, and S6Collector connects third power
Switching tube S3Emitter, S6Emitter connects the 4th power switch tube S4Collector.
The above is only a preferred embodiment of the present invention, it should be pointed out that: it within the scope of the technical concept of the present invention, can
To carry out a variety of equivalents to technical solution of the present invention, these equivalents are all belonged to the scope of protection of the present invention.
Claims (2)
1. one kind can total power factor operation without the non-isolated inverter of switching loss type, which is characterized in that including DC capacitor
Branch (1), high frequency main switch unit (2), resonant network (3) and low frequency afterflow unit (4), in which:
DC capacitor branch (1) is by DC capacitor (Cdc1) composition；
High frequency main switch unit (2) is by the first power switch tube (S1) and the first power diode (D1) parallel combination, the second function
Rate switching tube (S2) and the second power diode (D2) parallel combination, third power switch tube (S3) and third power diode
(D3) parallel combination and the 4th power switch tube (S4) and the 4th power diode (D4) parallel combination constitute；
Resonant network (3) is by the first auxiliary power switching tube (S1a) and the first auxiliary power diodes (D1a) parallel combination,
Two auxiliary power switching tube (S2a) and the second auxiliary power diodes (D2a) parallel combination, third auxiliary power switching tube
(S3a) and third auxiliary power diodes (D3a) parallel combination, the 4th auxiliary power switching tube (S4a) and the 4th auxiliary power
Diode (D4a) parallel combination, the 5th auxiliary power switching tube (Sa1) and the 5th auxiliary power diodes (Da1) in parallel group
It closes, the first auxiliary resonance capacitor (C1a), the first auxiliary resonance inductance (L1a), the second auxiliary resonance capacitor (C2a), second auxiliary it is humorous
Shake inductance (L2a) constitute；
Low frequency afterflow unit (4) is by the 5th power switch tube (S5) and the 5th power diode (D5) parallel combination, the 6th power
Switching tube (S6) and the 6th power diode (D6) parallel combination composition；
First power switch tube (the S1), the second power switch tube (S2), third power switch tube (S3), the 4th power switch
Manage (S4), the 5th power switch tube (S5), the 6th power switch tube (S6), the first auxiliary power switching tube (S1a), second auxiliary function
Rate switching tube (S2a), third auxiliary power switching tube (S3a), the 4th auxiliary power switching tube (S4a), the 5th auxiliary power switch
Manage (Sa1) it is wholly-controled device；
DC capacitor (the Cdc1) anode be separately connected the positive output end of solar battery PV, the first power switch tube (S1) and
Third power switch tube (S3) collector, the first power diode (D1) and third power diode (D3) cathode and
One auxiliary resonance capacitor (C1a) cathode；DC capacitor (Cdc1) negative terminal be separately connected the negative output terminal of solar battery PV,
Two power switch tube (S2) and the 4th power switch tube (S4) emitter, the second power diode (D2) and two pole of the 4th power
Manage (D4) anode and the second auxiliary resonance capacitor (C2a) anode；
First power switch tube (the S1) emitter respectively with the first power diode (D1) anode, the first auxiliary power
Switching tube (S1a) emitter, the first auxiliary power diodes (D1a) anode, the second power switch tube (S2) collector,
Two power diode (D2) cathode, the second auxiliary power switching tube (S2a) collector, the second auxiliary power diodes (D2a)
Cathode, the 5th power switch tube (S5) emitter and the 5th power diode (D5) anode be connected, and connection first
Network access filter inductance (L1) one end；Third power switch tube (S3) emitter respectively with third power diode (D3) sun
Pole, third auxiliary power switching tube (S3a) emitter, third auxiliary power diodes (D3a) anode, the 4th power switch
Manage (S4) collector, the 4th power diode (D4) cathode, the 4th auxiliary power switching tube (S4a) collector, the 4th auxiliary
Help power diode (D4a) cathode, the 6th power switch tube (S6) emitter and the 6th power diode (D6) anode phase
Connection, and the second network access filter inductance (L of connection2) one end；
5th power switch tube (the S5) collector and the 5th power diode (D5) cathode, the 6th power switch tube
(S6) collector and the 6th power diode (D6) cathode be connected；
The first auxiliary power switching tube (S1a) collector respectively with the first auxiliary power diodes (D1a) cathode, third
Auxiliary power switching tube (S3a) collector, third auxiliary power diodes (D3a) cathode and the first auxiliary resonance inductance
(L1a) first end be connected；Second auxiliary power switching tube (S2a) emitter respectively with the second auxiliary power diodes
(D2a) anode, the 4th auxiliary power switching tube (S4a) emitter, the 4th auxiliary power diodes (D4a) anode and second
Auxiliary resonance inductance (L2a) first end be connected；
The first auxiliary resonance capacitor (C1a) anode with the first auxiliary resonance inductance (L1a) second end, the 5th auxiliary power
Switching tube (Sa1) collector, the 5th auxiliary power diodes (Da1) cathode be connected；Second auxiliary resonance capacitor (C2a)
Cathode and the second auxiliary resonance inductance (L2a) second end, the 5th auxiliary power switching tube (Sa1) emitter, the 5th auxiliary function
Rate diode (Da1) anode be connected.
2. it is a kind of based on described in claim 1 can total power factor operation the switch control without the non-isolated inverter of switching loss type
Timing processed, which is characterized in that carry out region division, each power frequency using modulating wave zero crossing and reference current zero crossing as separation
Period is divided into four regions, and the switch control time sequence in different zones is different；
Under inverter non-unity power factor operating condition, SPWM modulates wave phaseWith amplitude A ' and reference current phase's
Corresponding relationship is respectively as follows:
Wherein, L is filter inductance value, and A is reference current amplitude, and ω is network voltage angular frequency, VpFor carrier amplitude, UPVFor too
Positive energy cell panel output voltage；
In modulating wave with reference current with phase and out-phase region, corresponding compensation rate is arranged to compensate for resonant network to modulating wave
Influence of the course of work to inverter output differential mode voltage；
Modulating wave positive half cycle, the first power switch tube (S1) and the 4th power switch tube (S4) it is that main switch is high by SPWM mode
Frequency acts；Modulating wave negative half period, the second power switch tube (S2) and third power switch tube (S3) it is that main switch presses SPWM mode
High frequency mo；The specific switch control time sequence in each region is as follows:
In the region that modulating wave is positive and reference current is positive, the first power switch tube (S1) and the 4th power switch tube (S4) tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；First auxiliary power switching tube (S1a) and the 4th auxiliary power open
Close pipe (S4a) driver' s timing having the same and press and the first power switch tube (S1) and the 4th power switch tube (S4) quasi- complementary
Mode high frequency mo, and the first auxiliary switch (S1a) the conducting incipient stage and the first power switch tube (S1) conducting end
There are crossover region, the 4th auxiliary switch (S in the tail stage4a) conducting end stage and the 4th power switch tube (S4) conducting start
There is crossover region in stage；
In the region that modulating wave is negative and reference current is negative, the second power switch tube (S2) and third power switch tube (S3) tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；Second auxiliary power switching tube (S2a) and third auxiliary power open
Close pipe (S3a) driver' s timing having the same and press and the second power switch tube (S2) and third power switch tube (S3) quasi- complementary
Mode high frequency mo, and the second auxiliary switch (S2a) the conducting incipient stage and the second power switch tube (S2) conducting end
There are crossover region, third auxiliary switch (S in the tail stage3a) conducting end stage and third power switch tube (S3) conducting start rank
Section has crossover region；
In the region that modulating wave is positive and reference current is negative, the first power switch tube (S1) and the 4th power switch tube (S4) tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；First auxiliary power switching tube (S1a) and the 4th auxiliary power open
Close pipe (S4a) driver' s timing having the same, it opens and lags behind the first power switch tube (S constantly1) open the moment, turn off
Moment and the first power switch tube (S1) the shutdown moment it is identical；5th auxiliary power switching tube (Sa1) press and the first power switch
Manage (S1) and the 4th power switch tube (S4) complementary mode high frequency mo；
In the region that modulating wave is negative and reference current is positive, the second power switch tube (S2) and third power switch tube (S3) tool
There is identical driver' s timing, and presses SPWM mode high frequency mo；Second auxiliary power switching tube (S2a) and third auxiliary power open
Close pipe (S3a) driver' s timing having the same, it opens and lags behind the second power switch tube (S constantly2) open the moment, turn off
Moment and the second power switch tube (S2) the shutdown moment it is identical；5th auxiliary power switching tube (Sa1) press and the second power switch
Manage (S2) and third power switch tube (S3) complementary mode high frequency mo.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111541228A (en) * | 2020-05-07 | 2020-08-14 | 国网湖南省电力有限公司 | Device and method for modulating electric energy parameters of low-voltage line tail end of power distribution station area |
| CN116667692A (en) * | 2023-08-02 | 2023-08-29 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
| CN116683787A (en) * | 2023-08-02 | 2023-09-01 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
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| CN103199727A (en) * | 2013-04-17 | 2013-07-10 | 东南大学 | Zero current switching full-bridge type non-isolated photovoltaic grid-connected inverter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111541228A (en) * | 2020-05-07 | 2020-08-14 | 国网湖南省电力有限公司 | Device and method for modulating electric energy parameters of low-voltage line tail end of power distribution station area |
| CN116667692A (en) * | 2023-08-02 | 2023-08-29 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
| CN116683787A (en) * | 2023-08-02 | 2023-09-01 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
| CN116683787B (en) * | 2023-08-02 | 2023-10-03 | 国网江苏省电力有限公司电力科学研究院 | Soft switching non-isolated grid-connected inverter circuit capable of running with zero switching loss |
| CN116667692B (en) * | 2023-08-02 | 2023-10-03 | 国网江苏省电力有限公司电力科学研究院 | Zero-current conversion full-bridge non-isolated inverter circuit without switching loss |
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