CN106849728A - The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch - Google Patents
The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch Download PDFInfo
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- 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
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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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
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Abstract
The invention discloses a kind of control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch, handed over triangular signal all the way by three-phase sine-wave signal and cut six preprocessed signals of bridge arm switching tube of generation inverter, by the judgement to six road preprocessed signal states, determine that inverter is in non-continued flow switch state or continued flow switch state.When inverter is in non-continued flow switch mode, six bridge arm switching tubes carry out Three-phase SPWM modulation control, and continued flow switch pipe and two clamp switch pipes are held off；When inverter is in continued flow switch mode, six bridge arm switching tubes are all held off, and continued flow switch pipe conducting, clamp switch pipe is selectively turned on by situation.The present invention makes inverter eliminate energy feedback power this link, improves the conversion efficiency of non-isolated photovoltaic DC-to-AC converter, it is suppressed that the common mode leakage current of photovoltaic DC-to-AC converter.
Description
Technical field
The present invention relates to power electronics AC/DC converter technique field, the Clamp three-phase particularly with continued flow switch
The control method of non-isolated photovoltaic DC-to-AC converter.
Background technology
Photovoltaic combining inverter requirement efficiency high, low cost, can bear photovoltaic cell output voltage fluctuate it is big bad
Influence, and its exchange output will also meet the quality of power supply higher.
Whether with isolating transformer can be divided into isolated form and non-isolation type according to inverter.Isolated form photovoltaic DC-to-AC converter
The electrical isolation of power network and cell panel is realized, the person and equipment safety has been ensured.But its volume is big, and price is high, system changeover
It is less efficient.Non-isolated photovoltaic DC-to-AC converter structure is free of transformer, low many with efficiency high, small volume, lightweight, cost
Advantage.
At present, the peak efficiency of non-isolated photovoltaic inverter system can reach more than 98%.But, the removal of transformer
So that there is electrical connection between input and output, due to the presence of cell panel direct-to-ground capacitance, inverter can produce common mode when working
Leakage current, increases system electromagnetic interference, influences the quality of grid current, the harm person and equipment safety.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art and provide the Clamp with continued flow switch
The control method of three-phase non-isolated photovoltaic DC-to-AC converter, the Clamp three-phase non-isolated photovoltaic inversion of junction belt continued flow switch of the present invention
The main circuit topology of device, gives its control method, has given full play to the Clamp three-phase non-isolated photovoltaic with continued flow switch inverse
The characteristics of becoming device, with preferable actual application value.
The present invention uses following technical scheme to solve above-mentioned technical problem：
According to the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch proposed by the present invention, band afterflow is opened
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter of pass includes solar cell, three-phase bridge type converter, filter circuit, load electricity
Road, continued flow switch and clamp circuit；Three-phase bridge type converter includes the first to the 6th switching tube, and filter circuit includes first to the
Three filter inductances and the first to the 3rd filter capacitor, load circuit include the first to 3rd resistor, and continued flow switch is opened including the 7th
Pipe and three-phase uncontrollable rectifier bridge are closed, three-phase uncontrollable rectifier bridge includes the first to the 6th commutation diode, and clamp circuit includes first
To the 3rd electric capacity, upper clamp switch pipe and lower clamp switch pipe；Wherein,
The positive pole of the positive pole of solar cell and the first electric capacity, the drain electrode of first switch pipe, the drain electrode of the 3rd switching tube, the 5th open
The drain electrode for closing pipe is respectively connected with, the negative pole of the negative pole of solar cell and the 3rd electric capacity, the source electrode of the 4th switching tube, the 6th switch
The source electrode of pipe, the source electrode of second switch pipe are respectively connected with, the drain electrode of the source electrode of first switch pipe and the 4th switching tube, the first filtering
One end of inductance, the anode of the first commutation diode are connected respectively, the drain electrode of the source electrode of the 3rd switching tube and the 6th switching tube,
One end of two filter inductances, the anode of the second commutation diode are connected respectively, source electrode and the second switch pipe of the 5th switching tube
Drain electrode, one end of the 3rd filter inductance, the anode of the 3rd commutation diode are connected respectively, the negative pole of the first electric capacity and the second electric capacity
Positive pole, the drain electrode of upper clamp switch pipe connect respectively, the positive pole of the negative pole of the second electric capacity and the 3rd electric capacity, lower clamp switch pipe
Source electrode connect respectively, the source electrode of upper clamp switch pipe and source electrode, anode, the 5th of the 4th commutation diode of the 7th switching tube
The anode of commutation diode, the anode of the 6th commutation diode are connected respectively, drain electrode and the 7th switching tube of lower clamp switch pipe
Drain electrode, the negative electrode of the first commutation diode, the negative electrode of the second commutation diode, the negative electrode of the 3rd commutation diode connect respectively
Connect, the anode of the first commutation diode is connected with the negative electrode of the 4th commutation diode, the anode of the second commutation diode and the 5th
The negative electrode connection of commutation diode, the anode of the 3rd commutation diode is connected with the negative electrode of the 6th commutation diode, the first filtering
The other end of inductance is connected respectively with the positive pole of the first filter capacitor, one end of first resistor, the other end of the second filter inductance
One end of positive pole, second resistance with the second filter capacitor is connected respectively, the other end and the 3rd filtered electrical of the 3rd filter inductance
The positive pole of appearance, one end of 3rd resistor connect respectively, the negative pole of the negative pole of the first filter capacitor and the second filter capacitor, the 3rd filter
The negative pole of ripple electric capacity, the other end of first resistor, the other end of second resistance, the other end of 3rd resistor are connected respectively；
The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch is as follows：
It is divided into both modalities which in an inversion cycle：Non- afterflow mode and afterflow mode；Wherein, the first to the 6th switching tube exists
Three-phase SPWM modulation control is carried out during the non-afterflow mode of inverter, the first to the 6th switching tube all keeps in afterflow mode
Off state；Upper clamp switch pipe, lower clamp switch pipe and the 7th switching tube all keep in the non-afterflow mode of inverter
Off state, in afterflow mode, the 7th switching tube is held on, and upper clamp switch pipe, lower clamp switch pipe interlock conducting.
Control method as the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch of the present invention enters one
Step prioritization scheme, when Three-phase SPWM modulate, if first switch pipe, the 3rd switching tube and the 5th switching tube occur turning on entirely or the
Two switching tubes, the 4th switching tube and the 6th switching tube are then afterflow mode when turning on entirely, and first to the 6th opens during afterflow mode
Guan Youyuan active states are closed to be turned off state, the 7th switching tube afterflow conducting, upper clamp switch pipe, lower clamp switch pipe
Selectively turned on according to afterflow reason, if first switch pipe, the 3rd switching tube and the 5th switching tube turn on the afterflow for causing entirely
Upper clamp switch pipe conducting, the lower clamp if second switch pipe, the 4th switching tube and the 6th switching tube turn on the afterflow for causing entirely
Switching tube is turned on；Therefore the non-continued flow switch mode of inverter has 6 in an inversion cycle, and continued flow switch mode has 2
It is individual；
Define inverter switching states for [M 1,M 3,M 5,M 7,M H,M L], wherein,M 1It is the state of first switch pipe,M 3It is the 3rd
The state of switching tube,M 5The state of the 5th switching tube,M 7It is the state of the 7th switching tube,M HIt is the state of upper clamp switch pipe,M L
It is the state of lower clamp switch pipe；
If first switch pipe opens the shut-off of the 4th switching tubeM 1=1, if the 3rd switching tube opens the shut-off of the 6th switching tubeM 3=
1, if the 5th switching tube opens the shut-off of second switch pipeM 5=1, if the 4th switching tube opens the shut-off of first switch pipeM 1=0, if
6th switching tube opens the shut-off of the 3rd switching tube thenM 3=0, if second switch pipe opens the shut-off of the 5th switching tubeM 5=0, if the
One to the 6th switching tube is turned off, thenM 1,M 3,M 5Represented with Z, if the 7th switching tube is turned onM 7=1, if the 7th switching tube is closed
It is disconnected thenM 7=0, if upper clamp switch pipe is turned onM H=1, if upper clamp switch pipe is closedM H=0, if lower clamp switch pipe is led
General ruleM L=1, if lower clamp switch pipe is closedM L=0；
Therefore the non-continued flow switch mode of inverter 6 be respectively [1,0,0,0,0,0], [1,1,0,0,0,0], [0,1,0,0,0,
0], [0,1,1,0,0,0], [0,0,1,0,0,0] and [1,0,1,0,0,0], 2 continued flow switch mode be respectively [Z, Z, Z, 1,
1,0] and [Z, Z, Z, 1,0,1].
Control method as the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch of the present invention enters one
Step prioritization scheme, produces the control signal of each switching tube as follows：
（1）The sinusoidal modulation wave of 120 ° of generation a, b, c three-phase phase mutual deviation and all the way triangular wave, three phase sine modulating wave respectively with
Triangular wave is handed over and cut, wherein, a phases sinusoidal modulation wave hands over the pre-processing waveform for cutting and producing first switch pipe with triangular waveV gs1', by its
Negate the pre-processing waveform for producing the 4th switching tubeV gs4’；B phases sinusoidal modulation wave is handed over to cut with triangular wave and produces the 3rd switching tube
Pre-processing waveformV gs3', negated the pre-processing waveform for producing the 6th switching tubeV gs6’；3rd road sinusoidal modulation wave and triangle
Ripple hands over the pre-processing waveform for cutting and producing the 5th switching tubeV gs5', negated the pre-processing waveform for producing second switch pipeV gs2’；
（2）By pre-processing waveformV gs1’、V gs3' andV gs5' do and obtain signal with computingV H', by pre-processing waveformV gs4’、V gs6' andV gs2' do and obtain signal with computingV L', by pre-processing waveformV gs1’、V gs3' andV gs5' three tunnels obtained after same or computing are done two-by-two
Signal does obtain signal with computing againV t’；
（3）By signalV H' and signalV t' do the grid source control waveform that upper clamp switch pipe is obtained with computingV gsH, by signalV L' and
SignalV t' do the grid source control waveform that lower clamp switch pipe is obtained with computingV gsL；
（4）ByV gsHWithV gsLDo or computing obtains the 7th switching tube grid source control waveformV gs7；
（5）WillV gsHNegate rear and pre-processing waveformV gs1’、V gs3' andV gs5' do respectively and the grid that first switch pipe is obtained after computing
Source controls waveformV gs1, the 3rd switching tube grid source control waveformV gs3Grid source with the 5th switching tube controls waveformV gs5；WillV gsL
Negate rear and pre-processing waveformV gs4’、V gs6' andV gs2' do respectively and the grid source control waveform that the 4th switching tube is obtained after computingV gs4, the 6th switching tube grid source control waveformV gs6Grid source with second switch pipe controls waveformV gs2。
Control method as the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch of the present invention enters one
Step prioritization scheme, is realized with door CD4081 chips and three inputs using two inputs with computing with door CD4073 chips, or computing is adopted
Realized with two input OR gate CD4071 chips, negating is realized using CD4049 chips.
Control method as the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch of the present invention enters one
Step prioritization scheme, same or computing is realized using CD4077 chips.
The present invention uses above technical scheme compared with prior art, with following technique effect：Do not use space vector
Control, thus both go for simulation control be equally applicable to it is digital control；Control program include non-afterflow Model control and
Afterflow Model control, need to switch on off state to realize that it is controlled, and handoff procedure can be light by logic judgment and logical operation
Pine nut shows；The introducing of non-afterflow mode, reduces the common-mode voltage of inverter, reduces loss, improves inverter efficiency.
Brief description of the drawings
Fig. 1 is the topology of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch that the present invention is applicable.
Fig. 2 (a) is pre-processing waveformV gs1’、V gs4’、V gs3’、V gs6’、V gs5' andV gs2' production method.
Fig. 2 (b) is control signal production method.
Fig. 3 is the Clamp three-phase non-isolated photovoltaic DC-to-AC converter drive signal timing diagram with continued flow switch.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (a) is in mode 1.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (b) is in mode 2.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (c) is in mode 3.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (d) is in mode 4.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (e) is in mode 5.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (f) is in mode 6.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (g) is in mode 7.
The Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch when Fig. 4 (h) is in mode 8.
Reference in figure is construed to：U PVIt is solar cell,S 1- S 7Respectively first to the 7th switching tube,L a、L b、L cRespectively first to the 3rd filter inductance,C fa、C fb、C fcRespectively first to the 3rd filter capacitor,R a、 R b 、 R c Respectively
It is the first to 3rd resistor,D a1、 D b1、 D c1、D a2、 D b2、D c2Respectively first to the 6th commutation diode,C dc1、C dc2、C dc3
Respectively first to the 3rd electric capacity,S HIt is upper clamp switch pipe,S LIt is lower clamp switch pipe.
Specific embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch is only applicable to the clamp with continued flow switch
Type three-phase non-isolated photovoltaic DC-to-AC converter (inverter circuit topology is as shown in Figure 1), a kind of Clamp three-phase with continued flow switch
Non-isolated photovoltaic DC-to-AC converter, including solar cellU PV, three-phase bridge type converter, filter circuit and load circuit, also including continuous
Stream switch and clamp circuit, three-phase bridge type converter include the first to the 6th switching tubeS 1- S 6, filter circuit includes first to the
Three filter inductancesL a、L b、L cWith the first to the 3rd filter capacitorC fa、C fb、C fc, load circuit include the first to 3rd resistorR a、R b、 R c , continued flow switch include the 7th switching tubeS 7With three-phase uncontrollable rectifier bridge, three-phase uncontrollable rectifier bridge includes first to the 6th whole
Stream diodeD a1、 D b1、 D c1、D a2、 D b2、D c2, clamp circuit include the first to the 3rd electric capacityC dc1、C dc2、C dc3, it is upper clamp open
Guan GuanS HWith lower clamp switch pipeS L；Wherein,
The positive pole of the positive pole of solar cell and the first electric capacity, the drain electrode of first switch pipe, the drain electrode of the 3rd switching tube, the 5th open
The drain electrode for closing pipe is respectively connected with, the negative pole of the negative pole of solar cell and the 3rd electric capacity, the source electrode of the 4th switching tube, the 6th switch
The source electrode of pipe, the source electrode of second switch pipe are respectively connected with, the drain electrode of the source electrode of first switch pipe and the 4th switching tube, the first filtering
One end of inductance, the anode of the first commutation diode are connected respectively, the drain electrode of the source electrode of the 3rd switching tube and the 6th switching tube,
One end of two filter inductances, the anode of the second commutation diode are connected respectively, source electrode and the second switch pipe of the 5th switching tube
Drain electrode, one end of the 3rd filter inductance, the anode of the 3rd commutation diode are connected respectively, the negative pole of the first electric capacity and the second electric capacity
Positive pole, the drain electrode of upper clamp switch pipe connect respectively, the positive pole of the negative pole of the second electric capacity and the 3rd electric capacity, lower clamp switch pipe
Source electrode connect respectively, the source electrode of upper clamp switch pipe and source electrode, anode, the 5th of the 4th commutation diode of the 7th switching tube
The anode of commutation diode, the anode of the 6th commutation diode are connected respectively, drain electrode and the 7th switching tube of lower clamp switch pipe
Drain electrode, the negative electrode of the first commutation diode, the negative electrode of the second commutation diode, the negative electrode of the 3rd commutation diode connect respectively
Connect, the anode of the first commutation diode is connected with the negative electrode of the 4th commutation diode, the anode of the second commutation diode and the 5th
The negative electrode connection of commutation diode, the anode of the 3rd commutation diode is connected with the negative electrode of the 6th commutation diode, the first filtering
The other end of inductance is connected respectively with the positive pole of the first filter capacitor, one end of first resistor, the other end of the second filter inductance
One end of positive pole, second resistance with the second filter capacitor is connected respectively, the other end and the 3rd filtered electrical of the 3rd filter inductance
The positive pole of appearance, one end of 3rd resistor connect respectively, the negative pole of the negative pole of the first filter capacitor and the second filter capacitor, the 3rd filter
The negative pole of ripple electric capacity, the other end of first resistor, the other end of second resistance, the other end of 3rd resistor are connected respectively.
The first to 3rd resistorR a、 R b 、 R c Respectively as A phase loads, B phase loads, C phase loads.
Six bridge arms are switched during the control method will produce the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch
PipeS 1、S 2、S 3、S 4、S 5WithS 6, upper clamp switch pipeS H, lower clamp switch pipeS LWith the 7th switching tubeS 7Totally nine controls of switching tube
Signal processed, the 7th switching tube is continued flow switch pipe.Control process is divided into the non-afterflow mode of both modalities which in an inversion cycle
With afterflow mode.Six of which bridge arm switching tube carries out Three-phase SPWM modulation control in the non-afterflow mode of inverter, continuous
State is all held off during stream mode.Two clamp switch pipes and continued flow switch the pipe whole in the non-afterflow mode of inverter
It is held off, in afterflow mode, continued flow switch pipe is held on, two clamp switch pipes interlock conducting.
It is afterflow mode, afterflow mode when being managed on bridge arm when conducting or down tube are turned on entirely entirely occurs in Three-phase SPWM modulation control
Six bridge arm switching tubes of period will be full off state, continued flow switch pipe afterflow conducting, clamp switch by former active state
Pipe is selectively turned on according to afterflow reason, if upper pipe turns on the afterflow for causing entirelyS HConducting, if down tube full conducting cause it is continuous
Stream is thenS LConducting.Therefore the non-continued flow switch mode of inverter has 6 in an inversion cycle, and continued flow switch mode has 2
It is individual.Define inverter switching states for [M 1,M 3,M 5,M 7,M H,M L], wherein,M 1It is the state of first switch pipe,M 3Open for the 3rd
The state of pipe is closed,M 5The state of the 5th switching tube,M 7It is the state of the 7th switching tube,M HIt is the state of upper clamp switch pipe,M LFor
The state of lower clamp switch pipe；
If first switch pipe opens the shut-off of the 4th switching tubeM 1=1, if the 3rd switching tube opens the shut-off of the 6th switching tubeM 3=
1, if the 5th switching tube opens the shut-off of second switch pipeM 5=1, the 4th switching tube opens the shut-off of first switch pipe thenM 1=0, if the
6th switching tube opens the shut-off of the 3rd switching tube thenM 3=0, if second switch pipe opens the shut-off of the 5th switching tubeM 5=0, if first
It is turned off to the 6th switching tube, thenM 1,M 3,M 5Represented with Z, if the 7th switching tube is turned onM 7=1, if the 7th switching tube is turned off
ThenM 7=0, if upper clamp switch pipe is turned onM H=1, if upper clamp switch pipe is closedM H=0, if lower clamp switch pipe is turned on
ThenM L=1, if lower clamp switch pipe is closedM L=0；
Therefore the non-continued flow switch mode of inverter 6 be respectively [1,0,0,0,0,0], [1,1,0,0,0,0], [0,1,0,0,0,
0], [0,1,1,0,0,0], [0,0,1,0,0,0] and [1,0,1,0,0,0], 2 continued flow switch mode be respectively [Z, Z, Z, 1,
1,0] and [Z, Z, Z, 1,0,1].Shown in eight kinds of switch mode such as (a)-Fig. 4 (h) of accompanying drawing 4.
Technical solution of the invention is shown in specific control signal producing method such as accompanying drawing 2 (a), Fig. 2 (b)：
（1）Generate the sinusoidal modulation wave and triangular wave all the way of three 120 ° of tunnel phase mutual deviations, three road sinusoidal modulation waves respectively with triangle
Ripple is handed over and cut, and wherein first via sinusoidal modulation wave hands over the pre-processing waveform for cutting and producing first switch pipe with triangular waveV gs1', taken
The pre-processing waveform of the 4th switching tube of anti-generationV gs4’；Second road sinusoidal modulation wave is handed over to cut with triangular wave and produces the 3rd switching tube
Pre-processing waveformV gs3', negated the pre-processing waveform for producing the 6th switching tubeV gs6’；3rd road sinusoidal modulation wave and triangle
Ripple hands over the pre-processing waveform for cutting and producing the 5th switching tubeV gs5', negated the pre-processing waveform for producing second switch pipeV gs2’。
（2）By pre-processing waveformV gs1’、V gs3' andV gs5' do and obtain signal with computingV H', by pre-processing waveformV gs4’、V gs6' andV gs2' do and obtain signal with computingV L', by pre-processing waveformV gs1’、V gs3' andV gs5' do two-by-two together or obtained after computing
Three road signals do obtain signal with computing againV t’。
（3）By signalV H' and signalV t' do and obtain upper clamp switch pipe with computingS HGrid source control waveformV gsH, will believe
NumberV L' and signalV t' do and obtain lower clamp switch pipe with computingS LGrid source control waveformV gsL。
（4）ByV gsHWithV gsLDo or computing obtains continued flow switch pipeS 7Grid source controls waveformV gs7。
（5）WillV gsHAfter negating respectively with pre-processing waveformV gs1’、V gs3' andV gs5' do and first switch pipe is obtained after computingS 1Grid source control waveformV gs1, the 3rd switching tubeS 3Grid source control waveformV gs3With the 5th switching tubeS 5Grid source control waveformV gs5.WillV gsLAfter negating respectively with pre-processing waveformV gs4’、V gs6' andV gs2' do and the 4th switching tube is obtained after computingS 4Grid
Source controls waveformV gs4, the 6th switching tubeS 6Grid source control waveformV gs6With second switch pipeS 2Grid source control waveformV gs2。
As shown in figure 3, giving control sequential figure of the present invention, waveform is respectively from top to bottom in figure：First switch pipeS 1
Grid source control waveformV gs1；4th switching tubeS 4Grid source control waveformV gs4；3rd switching tubeS 3Grid source control waveformV gs3；
6th switching tubeS 6Grid source control waveformV gs6；5th switching tubeS 5Grid source control waveformV gs5；Second switch pipeS 2Grid source
Control waveformV gs2；Continued flow switch pipeS 7Grid source controls waveformV gs7；Upper clamp switch pipeS HGrid source control waveformV gsH；Lower clamp
Switching tubeS LGrid source control waveformV gsL。
Correspond to respectively above-mentioned [1,0,0,0,0,0], [1,1,0,0,0,0], [0,1,0,0,0,0], [0,1,1,0,0,
0], [0,0,1,0,0,0], [1,0,1,0,0,0], [Z, Z, Z, 1,1,0] and [Z, Z, Z, 1,0,1] eight kinds of on off states.Below
The operation principle of inverter when briefly introducing each operation mode：
Mode 1：
As shown in Fig. 4 (a), in [1,0,0,0,0,0] on off state, switching tubeS 1、S 6WithS 2Gate source voltage be high level,S 1、S 6WithS 2It is in the conduction state；Switching tubeS 3、S 4、S 5、S 7、S HWithS LGate source voltage be zero,S 3、S 4、S 5、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 1—L a- A phase loads-midpointN- B phase loads, C phase loads-L b、L c—S 2、S 6 , finally flow back to power cathode.NowV AQ=V PV,V BQ=V CQ=0, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=1/3V PV。
Mode 2：
As shown in Fig. 4 (b), in [1,1,0,0,0,0] on off state, switching tubeS 1、S 3WithS 2Gate source voltage be high level,S 1、S 3WithS 2It is in the conduction state；Switching tubeS 4、S 5、S 6、S 7、S HWithS LGate source voltage be zero,S 4、S 5、S 6、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 1、S 3—L a、L b- A phase loads, B phase loads-midpointN- C phase loads-L c—S 2, finally flow back to power cathode.NowV AQ= V BQ=V PV,V CQ=0, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=2/
3V PV。
Mode 3：
As shown in Fig. 4 (c), in [0,1,0,0,0,0] on off state, switching tubeS 4、S 3WithS 2Gate source voltage be high level,S 4、S 3WithS 2It is in the conduction state；Switching tubeS 1、S 5、S 6、S 7、S HWithS LGate source voltage be zero,S 1、S 5、S 6、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 3—L b- B phase loads-midpointN- A phase loads, C phase loads-L a、L c—S 4、S 2 , finally flow back to power cathode.NowV BQ=V PV,V AQ=V CQ=0, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=1/3V PV。
Mode 4：
As shown in Fig. 4 (d), in [0,1,1,0,0,0] on off state, switching tubeS 4、S 3WithS 5Gate source voltage be high level,S 4、S 3WithS 5It is in the conduction state；Switching tubeS 1、S 2、S 6、S 7、S HWithS LGate source voltage be zero,S 1、S 2、S 6、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 3、S 5—L b、L c- B phase loads, C phase loads-midpointN- A phase loads-L a—S 4, finally flow back to power cathode.NowV BQ= V CQ=V PV,V AQ=0, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=2/
3V PV。
Mode 5：
As shown in Fig. 4 (e), in [0,0,1,0,0,0] on off state, switching tubeS 4、S 6WithS 5Gate source voltage be high level,S 4、S 6WithS 5It is in the conduction state；Switching tubeS 1、S 2、S 3、S 7、S HWithS LGate source voltage be zero,S 1、S 2、S 3、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 5—L c- C phase loads-midpointN- A phase loads, B phase loads-L a、L b—S 4、S 6, finally flow back to power cathode.NowV AQ= V BQ=0,V CQ=V PV, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=1/3V PV。
Mode 6：
As shown in Fig. 4 (f), in [1,0,1,0,0,0] on off state, switching tubeS 1、S 6WithS 5Gate source voltage be high level,S 1、S 6WithS 5It is in the conduction state；Switching tubeS 2、S 3、S 4、S 7、S HWithS LGate source voltage be zero,S 2、S 3、S 4、S 7、S HWithS LIn pass
Disconnected state.Electric current flows out from positive source, flows throughS 1、S 5—L a、L c- A phase loads, C phase loads-midpointN- B phase loads-L b—S 6, finally flow back to power cathode.NowV AQ= V CQ=V PV,V BQ=0, therefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=2/
3V PV。
Mode 7：
Once switching tubeS 1、S 3WithS 5Gate source voltage simultaneously be high level, switching tubeS 1、S 3、S 5It is in the conduction state, then to open
Guan GuanS 1、S 2、S 3、S 4、S 5WithS 6Needs are immediately turned off,S 7WithS HConducting, circuit enters freewheeling period.The previous state of the mode
There are two conductings in three switching tubes for usually going up bridge arm, here so that mode 2 enters mode 7 as an example, at [Z, Z, Z, 1,1,0]
Shown on off state, such as Fig. 4 (g), other situations are similar to.At this moment inductive current afterflow, electric current is flowed through successivelyL a、L b- A phases are born
Load, B phase loads-midpointN- C phase loads-L c—D c1—S 7—D a2、D b2；Freewheeling period, solar panel output end and electricity
Net disconnects.Switching tubeS HConducting makeV AQ、V BQ、V CQCurrent potential be clamped to the 2/3 of input voltage.The freewheeling period,V AQ=V BQ=V CQ=2/3V PVTherefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=2/3V PV。
Mode 8：
Once switching tubeS 4、S 6WithS 2Gate source voltage simultaneously be high level, switching tubeS 4、S 6、S 2It is in the conduction state, then to open
Guan GuanS 1、S 2、S 3、S 4、S 5WithS 6Needs are immediately turned off,S 7WithS LConducting, circuit enters freewheeling period.The previous state of the mode
There is a conducting in three switching tubes for usually going up bridge arm, here so that mode 5 enters mode 0 as an example, at [Z, Z, Z, 1,0,1]
Shown on off state, such as Fig. 4 (h), other situations are similar to.Inductive current afterflow, electric current is flowed through successivelyL c- C phase loads-midpoint
N-A phase loads, B phase loads-L a、L b—D a1、D b1—S 7—D c2；Freewheeling period, solar panel output end is broken with power network
Open.Switching tubeS LConducting makeV AQ、V BQ、V CQCurrent potential be clamped to the 1/3 of input voltage.The freewheeling period,V AQ=V BQ= V CQ
=1/3V PVTherefore common-mode voltageV cm=(V AQ+V BQ+V CQ)/3=1/3V PV。
From more than analyze, due to inverter freewheeling period continuous current circuit be clamped to input voltage 1/3rd or
1/2nd, the common-mode voltage variation scope of inverter from original 0 ~V PVIt is reduced to 1/3V PV~2/3V PV, it may be determined that common mode is leaked
Electric current is inhibited, and reduces the electromagnetic interference of system, it is ensured that the safety of the person and equipment.Additionally, switchS 7And rectifier bridge
Continuous current circuit is constituted, so that freewheeling period freewheel current is not passed through power supply, energy feedback power this link is eliminated,
Improve the conversion efficiency of inverter.
In sum, the present invention solves that three-phase non-isolated photovoltaic DC-to-AC converter common mode leakage current is big, the low skill of conversion efficiency
Art problem, provides a method that, with certain engineer applied to suppress three-phase non-isolated photovoltaic DC-to-AC converter common mode leakage current
Value.
Specific embodiments described above, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Detailed description, should be understood that and the foregoing is only specific embodiments of the present invention, be not limited to this hair
Bright scope, any those skilled in the art, what is made on the premise of design of the invention and principle is not departed from is equal to
Change and modification, all should belong to the scope of protection of the invention.
Claims (5)
1. the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch, it is characterised in that band continued flow switch
Clamp three-phase non-isolated photovoltaic DC-to-AC converter include solar cell, three-phase bridge type converter, filter circuit, load circuit,
Continued flow switch and clamp circuit；Three-phase bridge type converter includes the first to the 6th switching tube, and filter circuit includes first to the 3rd
Filter inductance and the first to the 3rd filter capacitor, load circuit include the first to 3rd resistor, and continued flow switch includes the 7th switch
Pipe and three-phase uncontrollable rectifier bridge, three-phase uncontrollable rectifier bridge include the first to the 6th commutation diode, clamp circuit include first to
3rd electric capacity, upper clamp switch pipe and lower clamp switch pipe；Wherein,
The positive pole of the positive pole of solar cell and the first electric capacity, the drain electrode of first switch pipe, the drain electrode of the 3rd switching tube, the 5th open
The drain electrode for closing pipe is respectively connected with, the negative pole of the negative pole of solar cell and the 3rd electric capacity, the source electrode of the 4th switching tube, the 6th switch
The source electrode of pipe, the source electrode of second switch pipe are respectively connected with, the drain electrode of the source electrode of first switch pipe and the 4th switching tube, the first filtering
One end of inductance, the anode of the first commutation diode are connected respectively, the drain electrode of the source electrode of the 3rd switching tube and the 6th switching tube,
One end of two filter inductances, the anode of the second commutation diode are connected respectively, source electrode and the second switch pipe of the 5th switching tube
Drain electrode, one end of the 3rd filter inductance, the anode of the 3rd commutation diode are connected respectively, the negative pole of the first electric capacity and the second electric capacity
Positive pole, the drain electrode of upper clamp switch pipe connect respectively, the positive pole of the negative pole of the second electric capacity and the 3rd electric capacity, lower clamp switch pipe
Source electrode connect respectively, the source electrode of upper clamp switch pipe and source electrode, anode, the 5th of the 4th commutation diode of the 7th switching tube
The anode of commutation diode, the anode of the 6th commutation diode are connected respectively, drain electrode and the 7th switching tube of lower clamp switch pipe
Drain electrode, the negative electrode of the first commutation diode, the negative electrode of the second commutation diode, the negative electrode of the 3rd commutation diode connect respectively
Connect, the anode of the first commutation diode is connected with the negative electrode of the 4th commutation diode, the anode of the second commutation diode and the 5th
The negative electrode connection of commutation diode, the anode of the 3rd commutation diode is connected with the negative electrode of the 6th commutation diode, the first filtering
The other end of inductance is connected respectively with the positive pole of the first filter capacitor, one end of first resistor, the other end of the second filter inductance
One end of positive pole, second resistance with the second filter capacitor is connected respectively, the other end and the 3rd filtered electrical of the 3rd filter inductance
The positive pole of appearance, one end of 3rd resistor connect respectively, the negative pole of the negative pole of the first filter capacitor and the second filter capacitor, the 3rd filter
The negative pole of ripple electric capacity, the other end of first resistor, the other end of second resistance, the other end of 3rd resistor are connected respectively；
The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch is as follows：
It is divided into both modalities which in an inversion cycle：Non- afterflow mode and afterflow mode；Wherein, the first to the 6th switching tube exists
Three-phase SPWM modulation control is carried out during the non-afterflow mode of inverter, the first to the 6th switching tube all keeps in afterflow mode
Off state；Upper clamp switch pipe, lower clamp switch pipe and the 7th switching tube all keep in the non-afterflow mode of inverter
Off state, in afterflow mode, the 7th switching tube is held on, and upper clamp switch pipe, lower clamp switch pipe interlock conducting.
2. the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch according to claim 1, its
It is characterised by, when Three-phase SPWM is modulated, if there is the conducting or second entirely of first switch pipe, the 3rd switching tube and the 5th switching tube
Switching tube, the 4th switching tube and the 6th switching tube are then afterflow mode when turning on entirely, the first to the 6th switch during afterflow mode
To be turned off state, the 7th switching tube afterflow is turned on Guan Youyuan active states, upper clamp switch pipe, lower clamp switch pipe root
Selectively turned on according to afterflow reason, on if first switch pipe, the 3rd switching tube and the 5th switching tube turn on the afterflow for causing entirely
Clamp switch pipe is turned on, and lower clamp is opened if second switch pipe, the 4th switching tube and the 6th switching tube turn on the afterflow for causing entirely
Close pipe conducting；Therefore the non-continued flow switch mode of inverter has 6 in an inversion cycle, and continued flow switch mode has 2；
Define inverter switching states for [M 1,M 3,M 5,M 7,M H,M L], wherein,M 1It is the state of first switch pipe,M 3Open for the 3rd
The state of pipe is closed,M 5The state of the 5th switching tube,M 7It is the state of the 7th switching tube,M HIt is the state of upper clamp switch pipe,M LFor
The state of lower clamp switch pipe；
If first switch pipe opens the shut-off of the 4th switching tubeM 1=1, if the 3rd switching tube opens the shut-off of the 6th switching tubeM 3=1,
If the 5th switching tube opens the shut-off of second switch pipeM 5=1, if the 4th switching tube opens the shut-off of first switch pipeM 1=0, if the
6th switching tube opens the shut-off of the 3rd switching tube thenM 3=0, if second switch pipe opens the shut-off of the 5th switching tubeM 5=0, if first
It is turned off to the 6th switching tube, thenM 1,M 3,M 5Represented with Z, if the 7th switching tube is turned onM 7=1, if the 7th switching tube is turned off
ThenM 7=0, if upper clamp switch pipe is turned onM H=1, if upper clamp switch pipe is closedM H=0, if lower clamp switch pipe is turned on
ThenM L=1, if lower clamp switch pipe is closedM L=0；
Therefore the non-continued flow switch mode of inverter 6 be respectively [1,0,0,0,0,0], [1,1,0,0,0,0], [0,1,0,0,0,
0], [0,1,1,0,0,0], [0,0,1,0,0,0] and [1,0,1,0,0,0], 2 continued flow switch mode be respectively [Z, Z, Z, 1,
1,0] and [Z, Z, Z, 1,0,1].
3. the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch according to claim 2, its
It is characterised by, the control signal of each switching tube is produced as follows：
（1）The sinusoidal modulation wave of 120 ° of generation a, b, c three-phase phase mutual deviation and all the way triangular wave, three phase sine modulating wave respectively with
Triangular wave is handed over and cut, wherein, a phases sinusoidal modulation wave hands over the pre-processing waveform for cutting and producing first switch pipe with triangular waveV gs1', by its
Negate the pre-processing waveform for producing the 4th switching tubeV gs4’；B phases sinusoidal modulation wave is handed over to cut with triangular wave and produces the 3rd switching tube
Pre-processing waveformV gs3', negated the pre-processing waveform for producing the 6th switching tubeV gs6’；3rd road sinusoidal modulation wave and triangle
Ripple hands over the pre-processing waveform for cutting and producing the 5th switching tubeV gs5', negated the pre-processing waveform for producing second switch pipeV gs2’；
（2）By pre-processing waveformV gs1’、V gs3' andV gs5' do and obtain signal with computingV H', by pre-processing waveformV gs4’、V gs6' andV gs2' do and obtain signal with computingV L', by pre-processing waveformV gs1’、V gs3' andV gs5' three tunnels obtained after same or computing are done two-by-two
Signal does obtain signal with computing againV t’；
（3）By signalV H' and signalV t' do the grid source control waveform that upper clamp switch pipe is obtained with computingV gsH, by signalV L' and
SignalV t' do the grid source control waveform that lower clamp switch pipe is obtained with computingV gsL；
（4）ByV gsHWithV gsLDo or computing obtains the 7th switching tube grid source control waveformV gs7；
（5）WillV gsHNegate rear and pre-processing waveformV gs1’、V gs3' andV gs5' do respectively and the grid that first switch pipe is obtained after computing
Source controls waveformV gs1, the 3rd switching tube grid source control waveformV gs3Grid source with the 5th switching tube controls waveformV gs5；WillV gsL
Negate rear and pre-processing waveformV gs4’、V gs6' andV gs2' do respectively and the grid source control waveform that the 4th switching tube is obtained after computingV gs4, the 6th switching tube grid source control waveformV gs6Grid source with second switch pipe controls waveformV gs2。
4. the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch according to claim 3, its
It is characterised by, is realized with door CD4073 chips with door CD4081 chips and three inputs using two inputs with computing, or computing is used
Two input OR gate CD4071 chips realize that negating is realized using CD4049 chips.
5. the control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch according to claim 3, its
It is characterised by, same or computing is realized using CD4077 chips.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390584A (en) * | 2018-02-12 | 2018-08-10 | 南京邮电大学 | A kind of control method of the ten switches non-isolated photovoltaic DC-to-AC converter of Clamp three-phase |
| CN108390583A (en) * | 2018-02-12 | 2018-08-10 | 南京邮电大学 | One kind ten switchs the non-isolated photovoltaic DC-to-AC converter topological structure of Clamp three-phase |
| CN110460259A (en) * | 2019-07-25 | 2019-11-15 | 南京邮电大学 | Ten switch of one kind staggeredly clamps three-phase photovoltaic inverter topological structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080298103A1 (en) * | 2007-06-01 | 2008-12-04 | Drs Power & Control Technologies, Inc. | Four pole neutral-point clamped three phase converter with low common mode voltage output |
| CN103346687A (en) * | 2013-06-20 | 2013-10-09 | 东华大学 | Single-phase non-isolated photovoltaic grid-connected inverter topological structure and control method thereof |
| CN104167946A (en) * | 2014-08-16 | 2014-11-26 | 南京邮电大学 | Midpoint clamping type single-phase non-isolated photovoltaic inverter main circuit topology with follow current switch |
| CN104201924A (en) * | 2014-08-16 | 2014-12-10 | 南京邮电大学 | Control method of neutral point clamping type single phase unfenced photovoltaic inverter with subsequent flow switch |
| CN104300822A (en) * | 2014-09-26 | 2015-01-21 | 南京邮电大学 | Method for controlling single-phase non-isolated photovoltaic inverter with follow current clamping switch |
-
2017
- 2017-03-15 CN CN201710152426.2A patent/CN106849728B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080298103A1 (en) * | 2007-06-01 | 2008-12-04 | Drs Power & Control Technologies, Inc. | Four pole neutral-point clamped three phase converter with low common mode voltage output |
| CN103346687A (en) * | 2013-06-20 | 2013-10-09 | 东华大学 | Single-phase non-isolated photovoltaic grid-connected inverter topological structure and control method thereof |
| CN104167946A (en) * | 2014-08-16 | 2014-11-26 | 南京邮电大学 | Midpoint clamping type single-phase non-isolated photovoltaic inverter main circuit topology with follow current switch |
| CN104201924A (en) * | 2014-08-16 | 2014-12-10 | 南京邮电大学 | Control method of neutral point clamping type single phase unfenced photovoltaic inverter with subsequent flow switch |
| CN104300822A (en) * | 2014-09-26 | 2015-01-21 | 南京邮电大学 | Method for controlling single-phase non-isolated photovoltaic inverter with follow current clamping switch |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390584A (en) * | 2018-02-12 | 2018-08-10 | 南京邮电大学 | A kind of control method of the ten switches non-isolated photovoltaic DC-to-AC converter of Clamp three-phase |
| CN108390583A (en) * | 2018-02-12 | 2018-08-10 | 南京邮电大学 | One kind ten switchs the non-isolated photovoltaic DC-to-AC converter topological structure of Clamp three-phase |
| CN108390583B (en) * | 2018-02-12 | 2019-11-29 | 南京邮电大学 | One kind ten switchs the non-isolated photovoltaic DC-to-AC converter topological structure of Clamp three-phase |
| CN108390584B (en) * | 2018-02-12 | 2019-12-31 | 南京邮电大学 | Control method of ten-switch clamping type three-phase non-isolated photovoltaic inverter |
| CN110460259A (en) * | 2019-07-25 | 2019-11-15 | 南京邮电大学 | Ten switch of one kind staggeredly clamps three-phase photovoltaic inverter topological structure |
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| CN110460259B (en) * | 2019-07-25 | 2021-06-22 | 南京邮电大学 | Ten-switch staggered clamping three-phase photovoltaic inverter topological structure |
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| CN111917322B (en) * | 2020-07-15 | 2022-08-23 | 南京邮电大学 | Control method of single-bus isolation bidirectional clamping ten-switch three-phase inverter |
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