CN106788215A - For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic - Google Patents
For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic Download PDFInfo
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- CN106788215A CN106788215A CN201611257346.5A CN201611257346A CN106788215A CN 106788215 A CN106788215 A CN 106788215A CN 201611257346 A CN201611257346 A CN 201611257346A CN 106788215 A CN106788215 A CN 106788215A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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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
- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention discloses a kind of Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic, including：Input inductance, main switch unit, auxiliary switching element, output diode and the resonant tank being made up of resonant capacitance, resonant inductance；It is input into one end connection photovoltaic battery panel positive pole of inductance, the other end connects the high-pressure side of master power switch pipe, one end of resonant inductance, the anode of output diode respectively, the other end of resonant inductance connects the high-pressure side of auxiliary power switching tube, the low-pressure end of master power switch pipe and auxiliary power switching tube is connected to photovoltaic battery panel negative pole, the negative electrode of output diode, one end of output capacitance are all connected with the positive pole of output end, and the other end of output capacitance connects the negative pole of output end；Resonant capacitance is arranged in parallel in the two ends of output diode.The present invention has simple structure, required low cost, can realize that Sofe Switch switches, and switching loss is low, small electromagnetic interference and the advantages of voltage conversion efficiency high.
Description
Technical field
It is used for the collecting and distributing power supply of photovoltaic the present invention relates to a kind of collecting and distributing power type technical field of photovoltaic power generation, more particularly to one kind
Sofe Switch dc/dc boost converter.
Background technology
Collecting and distributing power type photovoltaic generating system is used as a kind of preferred photovoltaic generating system form emerging in recent years, existing biography
The stability of the centralized grid-connected system of system, is both and has the multichannel MPPT of group string data photovoltaic generating system（Peak power
Point tracking）Control, the advantages of generated energy is more.Collecting and distributing power type photovoltaic generating system topological structure is as shown in figure 1, by photovoltaic battle array
Row, collecting and distributing power subsystem, combining inverter composition, usually dc/dc boost converter form, realizes the work(of photovoltaic array
Rate output maximizes control（MPPT）.In collecting and distributing power type photovoltaic generation, collecting and distributing power subsystem as whole electricity generation system pass
Key asembly, its conversion efficiency will directly influence the generating efficiency and generated electric power output of electricity generation system, therefore usually require that energy
Enough efficient execution DC-DC voltage conversions.
Current dc/dc boost translation circuit is typical as shown in Fig. 2 including input filter inductance L, power switch
Pipe Q, output diode D and output capacitance Co, it is assumed that all of device is the device of ideal characterisitics, and each device output waveform is such as
Shown in Fig. 3.Power switch pipe Q is opened first, electric current straight line increases in input filter inductance L, its result is by the energy of input power
Amount is changed and has been stored into input filter inductance L；Hereafter switch-off power switching tube Q, the electric current in Q is down to zero, input filter
Electric current in inductance L has the power switch pipe Q changes of current to output diode D, and the energy output in input filter inductor L is arrived into defeated
Exit port, while the electric current straight line in input filter inductance L is reduced, the electric energy of its storage is also reduced therewith；More than repetition
The opening of power switch pipe Q, shut-off action, complete the low-voltage electric energy of input to be continuously converted into high voltage electric energy and is passed
It is defeated to output end.
In above-mentioned dc/dc boost translation circuit, the opening of power switch pipe and diode, shut-off action is by hard
Switch switching, as shown in figure 4, power switch pipe Q can produce the overlap of electric current, voltage during turning on and off, so that
Switching loss is produced, output diode D is when off because intrinsic reverse recovery characteristic can also produce switching loss；Switch is damaged
Consumption increases with the increase of contactor frequency, and huge loss will be produced during high frequency mo, can have a strong impact on turning for circuit
Change efficiency, thus traditional dc/dc boost translation circuit conversion efficiency is relatively low in practice, it is impossible to meet the collecting and distributing power supply of photovoltaic
Voltage transformation requirement.
The content of the invention
The technical problem to be solved in the present invention is that：For the technical problem that prior art is present, the present invention provides one
Kind of simple structure, required low cost, can realize that Sofe Switch switches, and switching loss is low, electromagnetic interference is small and voltage conversion
The Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic of efficiency high.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic, including：It is input inductance L, main switch unit, auxiliary
Help switch element, output diode D and the resonant tank being made up of resonant capacitance Cr, resonant inductance Lr；The main switch list
Unit includes the master power switch pipe and diode that are connected in antiparallel；The auxiliary switching element includes what is be connected in antiparallel
Auxiliary power switching tube and diode；
One end connection photovoltaic battery panel positive pole of the input inductance L, the other end connects the height of the master power switch pipe respectively
Pressure side, one end of the resonant inductance Lr, the anode of the output diode D, the other end connection institute of the resonant inductance Lr
State the high-pressure side of auxiliary power switching tube, the low-pressure end of the master power switch pipe and the auxiliary power switching tube is all connected with
To photovoltaic battery panel negative pole, the negative electrode of the output diode D, one end of the output capacitance Co are being all connected with output end vo just
Pole, the other end of the output capacitance Co connects the negative pole of output end vo；
The resonant capacitance Cr is arranged in parallel in the two ends of the output diode D.
As a further improvement on the present invention：Also include the first diode D1, the second diode D2 and Absorption Capacitance C1；
The anode of the first diode D1 connects the resonant inductance Lr, the high-pressure side of the auxiliary power switching tube respectively,
The negative electrode of the first diode D1 connects the anode of the second diode D2, and the negative electrode connection of the second diode D2 is defeated
Go out to hold the positive pole of Vo；One end of the Absorption Capacitance C1 connects the anode of the output diode D, and the other end connects described respectively
The anode of the negative electrode of the first diode D1, the second diode D2.
As a further improvement on the present invention：Also include connecting with the master power switch pipe, auxiliary power switching tube respectively
The controller unit for connecing, the controller unit controls first to open the auxiliary power switch pipe unit, the resonant inductance Lr,
The master power switch pipe is opened in control after the resonant tank of resonant capacitance Cr compositions completes resonant process, then controls to turn off successively
The auxiliary power switching tube, the master power switch pipe, to complete the conversion of low pressure to high pressure.
As a further improvement on the present invention：The master power switch pipe, auxiliary power switching tube are IGBT power and open
Guan Guan.
For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic, including：Input inductance L, main switch list
Unit, auxiliary switching element, output diode D, by resonant capacitance Cr, the resonant tank being made up of resonant inductance Lr and reversely electricity
Stream suppresses diode；The main switch unit includes the master power switch pipe and diode that are connected in antiparallel；The auxiliary
Switch element includes the auxiliary power switching tube and diode that are connected in antiparallel；
One end connection photovoltaic battery panel positive pole of the input inductance L, the other end connects the height of the master power switch pipe respectively
Pressure side, one end of the resonant inductance Lr, the anode of the output diode D, the other end connection institute of the resonant inductance Lr
State the high-pressure side of auxiliary power switching tube, the low-pressure end of the master power switch pipe and the auxiliary power switching tube is all connected with
To photovoltaic battery panel negative pole, the negative electrode of the output diode D, one end of the output capacitance Co are being all connected with output end vo just
Pole, the other end of the output capacitance Co connects the negative pole of output end vo；
The resonant capacitance Cr is arranged in parallel in the two ends of the output diode D；
The anode that the reverse current suppresses diode is arranged between the resonant inductance Lr, the auxiliary power switching tube.
As a further improvement on the present invention：Also include the first diode D1, the second diode D2 and Absorption Capacitance C1；
The anode of the first diode D1 connects the resonant inductance Lr, the high-pressure side of the auxiliary power switching tube respectively,
The negative electrode of the first diode D1 connects the anode of the second diode D2, and the negative electrode connection of the second diode D2 is defeated
Go out to hold the positive pole of Vo；One end of the Absorption Capacitance C1 connects the anode of the output diode D, and the other end connects described respectively
The anode of the negative electrode of the first diode D1, the second diode D2.
As a further improvement on the present invention：The anode that the reverse current suppresses diode connects the resonance electricity respectively
Sense Lr, the anode of the first diode D1, the reverse current suppress the negative electrode and the auxiliary power switching tube of diode
High-pressure side connection.
As a further improvement on the present invention：The anode that the reverse current suppresses diode connects the resonant inductance
Lr, negative electrode connects the anode of the first diode D1, the high-pressure side of the auxiliary power switching tube respectively.
As a further improvement on the present invention：Also include connecting with the master power switch pipe, auxiliary power switching tube respectively
The controller unit for connecing, the controller unit controls first to open the auxiliary power switch pipe unit, the resonant inductance Lr,
The master power switch pipe is opened in control after the resonant tank of resonant capacitance Cr compositions completes resonant process, then controls to turn off successively
The auxiliary power switch pipe unit, the master power switch pipe, to complete the conversion of low pressure to high pressure.
As a further improvement on the present invention：The master power switch pipe, auxiliary power switching tube are respectively IGBT power
Switching tube.
Compared with prior art, the advantage of the invention is that：Sofe Switch direct current/straight of the present invention for the collecting and distributing power supply of photovoltaic
Stream booster converter, including input inductance, main switch unit, auxiliary switching element, output diode and by resonant capacitance,
The resonant tank that resonant inductance is constituted, the master being made up of input inductance, main switch unit, output diode and output capacitance opens
Powered-down road, realizes the boosting inverter function to input voltage, while electric with including resonant inductance, resonance by auxiliary power switching tube
The resonant tank of appearance constitutes auxiliary switching circuit, and auxiliary power switching tube switches open-minded in turn with master power switch pipe, opens
The rate of change of voltage and current is limited in journey by resonant tank, the soft handover of power switch pipe and diode can be realized,
Switch electromagnetic interference is reduced, and by output diode two ends resonant capacitance in parallel, can both reduce opening for master power switch pipe
Loss is closed, the Reverse recovery switching loss of output diode can be reduced again, it is thus possible to reduced to greatest extent, even eliminate work(
The switching loss of rate switching tube and diode, so as to improve the conversion efficiency of system to greatest extent, meets the collecting and distributing power supply of photovoltaic
Conversion requirements.
Brief description of the drawings
Fig. 1 is the topological structure schematic diagram of collecting and distributing type photovoltaic generating system.
Fig. 2 is the structural representation of existing dc/dc boost converter.
Fig. 3 is the output waveform diagram of existing dc/dc boost converter.
Fig. 4 is the switching loss waveform diagram of existing dc/dc boost converter.
Fig. 5 is that the structure of the Sofe Switch dc/dc boost converter that the embodiment of the present invention 1 is used for the collecting and distributing power supply of photovoltaic is shown
It is intended to.
Fig. 6 is the output waveform diagram of each part of dc/dc boost converter in the embodiment of the present invention 1.
Fig. 7 is the first structural representation of dc/dc boost converter in the embodiment of the present invention 2.
Fig. 8 is second structural representation of dc/dc boost converter in the embodiment of the present invention 2.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Embodiment 1：
As shown in figure 5, the Sofe Switch dc/dc boost converter that the present embodiment is used for the collecting and distributing power supply of photovoltaic includes：Input electricity
Sense L, main switch unit, auxiliary switching element, output diode D and the resonance being made up of resonant capacitance Cr, resonant inductance Lr
Loop；Main switch unit includes the master power switch pipe and diode that are connected in antiparallel；Auxiliary switching element includes reverse
The auxiliary power switching tube and diode being connected in parallel；One end connection photovoltaic battery panel positive pole of input inductance L, the other end point
Not Lian Jie master power switch pipe high-pressure side, one end of resonant inductance Lr, the anode of output diode D, resonant inductance Lr's is another
The low-pressure end of the high-pressure side of one end connection auxiliary power switching tube, master power switch pipe and auxiliary power switching tube is connected to
Photovoltaic battery panel negative pole, the negative electrode of output diode D, one end of output capacitance Co are all connected with the positive pole of output end vo, output electricity
The other end for holding Co connects the negative pole of output end vo；Resonant capacitance Cr is arranged in parallel in the two ends of output diode D.
In the present embodiment, master power switch pipe, auxiliary power switching tube are IGBT, respectively master power switch pipe Q with
And auxiliary power switching tube Qa, wherein being specifically connected with input inductor L by the colelctor electrode of master power switch pipe Q, auxiliary power
The colelctor electrode of switching tube Qa is connected with resonant inductance Lr, master power switch pipe Q, auxiliary power switching tube Qa emitter stage and light
Lie prostrate the negative pole connection of cell panel.Certain master power switch pipe, auxiliary power switching tube can also according to the actual requirements use other
Type power switching tube.
The above-mentioned dc/dc boost converter of the present embodiment, by input inductance L, main switch unit, output diode D with
And output capacitance Co constitutes main switch circuit, the boosting inverter function to input voltage is realized, by PWM（pulse width
Modulation, pulsewidth modulation）The i.e. controllable power conversion of control master power switch pipe action；Meanwhile, switched by auxiliary power
Pipe and the resonant tank composition auxiliary switching circuit for including resonant inductance Lr, resonant capacitance Cr, auxiliary power switching tube and main work(
Rate switching tube switch in turn it is open-minded, in opening process by resonant tank limit voltage and current rate of change, work(can be realized
The soft handover of rate switching tube and diode, reduces switch electromagnetic interference, and by output diode D two ends resonance electricity in parallel
Hold Cr, can both reduce the switching loss of master power switch pipe Q, the Reverse recovery switching loss of output diode D can be reduced again, because
And can to greatest extent reduce, even eliminate the switching loss of power switch pipe and diode, so as to improve to greatest extent
The conversion efficiency of system, meets the conversion requirements of the collecting and distributing power supply of photovoltaic.
Above-mentioned dc/dc boost converter can to greatest extent reduce switching loss, now increase substantially switch
Frequency influences smaller to conversion efficiency, and the present embodiment is based on above-mentioned dc/dc boost converter, further by reducing filtering
Device parameter, can also significantly reduce the bulking value of system.
In the present embodiment, also including the first diode D1, the second diode D2 and Absorption Capacitance C1；First diode D1
Anode be connected between resonant inductance Lr, auxiliary power switching tube, the negative electrode of the first diode D1 connects the second diode D2
Anode, the negative electrode of the second diode D2 connects the positive pole of output end vo；One end of Absorption Capacitance C1 connects output diode D's
Anode, the other end is connected between the first diode D1, the second diode D2.
As shown in figure 5, the present embodiment is specifically connected by the first end of input inductor L with the positive pole of photovoltaic battery panel, it is defeated
Enter second end of inductor L and the colelctor electrode of power switch pipe Q, the first end of resonant inductor Lr, the first of resonant capacitance Cr
End, the anode connection of the first end of Absorption Capacitance C1, output diode D, emitter stage and the photovoltaic battery panel of power switch pipe Q
Negative pole is connected, and second end of resonant inductor Lr connects with the anode of the colelctor electrode of auxiliary power switching tube Qa, power diode D1
Connect, the emitter stage of auxiliary power switching tube Qa is connected with the negative pole of photovoltaic battery panel, negative electrode and the absorption electricity of power diode D1
Hold the anode connection of second end of C1, power diode D2, it is the negative electrode of power diode D2 and the negative electrode of output diode D, defeated
Go out the positive pole of electric capacity Co, second end of resonant capacitance Cr connects, the negative pole of output capacitance Co is connected with the negative pole of photovoltaic battery panel,
Both positive and negative polarity of the both positive and negative polarity of output end vo respectively with output capacitance Co is connected.
In the present embodiment, also including the controller unit being connected with master power switch pipe, auxiliary power switching tube respectively, control
Auxiliary power switch pipe unit is first opened in device unit control processed, and the resonant tank of resonant inductance Lr, resonant capacitance Cr composition is completed
Master power switch pipe is opened in control after resonant process, then controls to turn off auxiliary power switch pipe unit, master power switch pipe successively,
To complete the conversion of low pressure to high pressure.
When the above-mentioned dc/dc boost converter of the present embodiment works, before master power switch pipe Q is opened, auxiliary is opened
Power switch pipe Qa, the resonant tank that startup is made up of resonant inductance Lr, resonant capacitance Cr, realizes the soft pass of output diode
It is disconnected, and master power switch pipe Q both end voltages are pulled to zero volt, master power switch pipe Q is now opened again, it is capable of achieving master power switch
The no-voltage of pipe Q is open-minded；Simultaneously as being realized auxiliary because resonant inductance Lr electric currents are zero when auxiliary power switching tube Qa is opened
Help power switch pipe Qa zero current turning-ons；And during major-minor power switch pipe Q, Qa shut-off, by resonant capacitance Cr, Absorption Capacitance C1 can
Maintain power switch pipe both end voltage to be near zero in turn off process, that is, realize power switch pipe zero voltage turn-off, that is, lead to
The above-mentioned dc/dc boost converter of the present embodiment is crossed, each power switch pipe, the opening of diode, shut-off action can be realized
Sofe Switch switching.
Each component voltage current wave when being illustrated in figure 6 the above-mentioned dc/dc boost converter normal work of the present embodiment
Shape, for ease of analysis, ignores the conduction voltage drop of each power switch pipe and passive device, and above-mentioned dc/dc boost converts utensil
Body includes following 6 kinds of mode of operations：
Pattern 1：Master power switch pipe Q and auxiliary power switching tube Qa are in cut-off state.Energy in input inductor L leads to
Cross output diode D and pass to outlet side；The electric current for then flowing through resonant inductance Lr is zero, resonant capacitance Cr and Absorption Capacitance C1
The voltage at two ends is also zero；The electric current flowed through in input inductance L is successively decreased with the slope of (Vo-Vin)/L, and wherein Vo is output electricity
Pressure value, Vin are input voltage value；
Pattern 2：Qa is open-minded for auxiliary power switching tube, the electric current of resonant inductance Lr start from scratch it is linearly increasing, output diode D's
Electric current linearly reduces, until the reverse recovery current value intrinsic equal to the device of output diode D.Resonant capacitance Cr in this pattern
Both end voltage remains as zero, and master power switch pipe Q both end voltages are equal with output voltage Vo.Due to flowing into auxiliary switch Qa's
Electric current is identical with the electric current of resonant inductance Lr, and resonant inductance Lr electric currents maintain small value, auxiliary power switch in opening process
Pipe Qa is opened and is approximately zero current turning-on, and turn-on consumption is negligible；
Pattern 3：The electric current of resonant inductance Lr continues to increase, and output diode D reverse recovery currents start to be decreased to nature shut-off.
Now resonant inductance Lr and resonant capacitance Cr starts resonance, and resonant capacitance Cr is charged by resonant inductance Lr until output voltage
Value Vo, while master power switch pipe Q both end voltages are down to zero, resonant process terminates.Due to the resonance in parallel with output diode D
Electric capacity Cr inhibits the growth of the backward voltage of output diode D so that diode D Reverse recovery switching losses are greatly reduced,
It is negligible；
Pattern 4：When master power switch pipe Q both end voltages are down to zero, its body diode is turned on naturally, both end voltage clamp in
Zero, signal is opened in now master power switch pipe Q applyings.Because master power switch pipe Q is turned on naturally, turn-on consumption is not produced,
As no-voltage is open-minded；
Pattern 5：Auxiliary switch Qa applies cut-off signals, due to the presence of Absorption Capacitance C1 so that auxiliary power switching tube Qa
Both end voltage is elevated to slow, i.e., auxiliary power switching tube Qa can realize soft switching.Under the pattern, resonant inductance Lr warps
Cross the first diode D1 to be charged to Absorption Capacitance C1, until the electric current for flowing through resonant inductance Lr is zero, complete master power switch pipe Q
Conducting state conversion；
Pattern 6：Master power switch pipe Q shut-offs are acted, and due to the presence of resonant capacitance Cr, master power switch pipe Q both end voltages are delayed
It is slow to rise, can complete to be changed from the soft switching for being conducting to cut-off under low-voltage state.Afterwards, input inductance L electric currents are to humorous
Shake electric capacity Cr and Absorption Capacitance C1 reverse chargings, until voltage is to zero, thereafter through output diode D flow direction output buses；
6 periodicity of pattern are performed more than, are capable of achieving to be converted into the power of High voltage output power from low pressure input power
Conversion, and power switch pipe, diode are Sofe Switch switching in transfer process, can to greatest extent reduce switching loss,
Improve conversion efficiency.
Embodiment 2：
The present embodiment is substantially the same manner as Example 1, and difference is to be additionally provided between resonant inductance Lr, auxiliary power switching tube
Reverse current suppresses diode, i.e. the present embodiment and is used for the Sofe Switch dc/dc boost conversion implement body of the collecting and distributing power supply of photovoltaic
Including：Input inductance L, master power switch pipe, auxiliary power switching tube, output diode D, by resonant capacitance Cr, by resonance electricity
The resonant tank and reverse current that sense Lr is constituted suppress diode；One end connection photovoltaic battery panel positive pole of input inductance L, separately
One end connects the high-pressure side of master power switch pipe, one end of resonant inductance Lr, the anode of output diode D, resonant inductance respectively
The low-pressure end of the high-pressure side of the other end connection auxiliary power switching tube of Lr, master power switch pipe and auxiliary power switching tube is equal
Photovoltaic battery panel negative pole is connected to, the negative electrode of output diode D, one end of output capacitance Co are all connected with the positive pole of output end vo,
The other end of output capacitance Co connects the negative pole of output end vo；Resonant capacitance Cr is arranged in parallel in the two ends of output diode D；Instead
The anode for suppressing diode to electric current is arranged between resonant inductance Lr, auxiliary power switching tube.
If the body junction capacity value of auxiliary power switching tube is larger, during the conducting of master power switch pipe in resonant inductance Lr
There may be lasting reverse current, the extra conduction loss that can be produced.The present embodiment by auxiliary power switching tube with it is humorous
Shake and arrange between inductance Lr that reverse current suppresses diode, the generation of reverse current can be suppressed.
The present embodiment dc/dc boost converter the first structure is illustrated in figure 7, specific reverse current suppresses two poles
The anode of pipe D3 connects resonant inductance Lr, the anode of the first diode D1 respectively, reverse current suppress the negative electrode of diode D3 with
The high-pressure side connection of auxiliary power switching tube.Master power switch pipe, auxiliary power switching tube are respectively IGBT power switch pipes（Q、
Qa）.
The present embodiment dc/dc boost second structure of converter is illustrated in figure 8, specific reverse current suppresses two poles
The anode connection resonant inductance Lr of pipe D3, negative electrode connects the anode of the first diode D1, the high pressure of auxiliary power switching tube respectively
End.Master power switch pipe, auxiliary power switching tube are respectively IGBT power switch pipes（Q、Qa）.
The present embodiment is same as Example 1, also including the first diode D1, the second diode D2 and Absorption Capacitance
C1；The anode of the first diode D1 is connected between resonant inductance Lr, auxiliary power switching tube, and the negative electrode of the first diode D1 connects
The anode of the second diode D2 is connect, the negative electrode of the second diode D2 connects the positive pole of output end vo；One end of Absorption Capacitance C1 connects
The anode of output diode D is connect, the other end is connected between the first diode D1, the second diode D2.
The present embodiment is same as Example 1, also including being connected with master power switch pipe, auxiliary power switching tube respectively
Auxiliary power switch pipe unit is first opened in controller unit, controller unit control, resonant inductance Lr, resonant capacitance Cr composition
Master power switch pipe is opened in control after resonant tank completes resonant process, then control to turn off successively auxiliary power switch pipe unit,
Master power switch pipe, to complete the conversion of low pressure to high pressure.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any formal limitation to the present invention.Although of the invention
It is disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, it is every without departing from technical solution of the present invention
Content, according to the technology of the present invention essence to any simple modification, equivalent variation and modification made for any of the above embodiments, all should fall
In the range of technical solution of the present invention protection.
Claims (10)
1. the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic is used for, it is characterised in that including：Input inductance L, master
Switch element, auxiliary switching element, output diode D and the resonant tank being made up of resonant capacitance Cr, resonant inductance Lr；
The main switch unit includes the master power switch pipe and diode that are connected in antiparallel；The auxiliary switching element includes anti-
To the auxiliary power switching tube and diode that are connected in parallel；
One end connection photovoltaic battery panel positive pole of the input inductance L, the other end connects the height of the master power switch pipe respectively
Pressure side, one end of the resonant inductance Lr, the anode of the output diode D, the other end connection institute of the resonant inductance Lr
State the high-pressure side of auxiliary power switching tube, the low-pressure end of the master power switch pipe and the auxiliary power switching tube is all connected with
To photovoltaic battery panel negative pole, the negative electrode of the output diode D, one end of the output capacitance Co are being all connected with output end vo just
Pole, the other end of the output capacitance Co connects the negative pole of output end vo；
The resonant capacitance Cr is arranged in parallel in the two ends of the output diode D.
2. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 1, its feature exists
In：Also include the first diode D1, the second diode D2 and Absorption Capacitance C1；
The anode of the first diode D1 connects the resonant inductance Lr, the high-pressure side of the auxiliary power switching tube respectively,
The negative electrode of the first diode D1 connects the anode of the second diode D2, and the negative electrode connection of the second diode D2 is defeated
Go out to hold the positive pole of Vo；One end of the Absorption Capacitance C1 connects the anode of the output diode D, and the other end connects described respectively
The anode of the negative electrode of the first diode D1, the second diode D2.
3. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 1 and 2, it is special
Levy and be：Also include the controller unit being connected with the master power switch pipe, auxiliary power switching tube respectively, the controller
The auxiliary power switch pipe unit, the resonant tank of the resonant inductance Lr, resonant capacitance Cr composition are first opened in unit control
The master power switch pipe is opened in control after completing resonant process, then controls to turn off successively the auxiliary power switching tube, described
Master power switch pipe, to complete the conversion of low pressure to high pressure.
4. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 1 and 2, it is special
Levy and be, the master power switch pipe, auxiliary power switching tube are IGBT power switch pipes.
5. the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic is used for, it is characterised in that including：Input inductance L, master
Switch element, auxiliary switching element, output diode D, by resonant capacitance Cr, the resonant tank being made up of resonant inductance Lr and
Reverse current suppresses diode；The main switch unit includes the master power switch pipe and diode that are connected in antiparallel；Institute
Stating auxiliary switching element includes the auxiliary power switching tube and diode that are connected in antiparallel；
One end connection photovoltaic battery panel positive pole of the input inductance L, the other end connects the height of the master power switch pipe respectively
Pressure side, one end of the resonant inductance Lr, the anode of the output diode D, the other end connection institute of the resonant inductance Lr
State the high-pressure side of auxiliary power switching tube, the low-pressure end of the master power switch pipe and the auxiliary power switching tube is all connected with
To photovoltaic battery panel negative pole, the negative electrode of the output diode D, one end of the output capacitance Co are being all connected with output end vo just
Pole, the other end of the output capacitance Co connects the negative pole of output end vo；
The resonant capacitance Cr is arranged in parallel in the two ends of the output diode D；
The anode that the reverse current suppresses diode is arranged between the resonant inductance Lr, the auxiliary power switching tube.
6. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 5, its feature exists
In：Also include the first diode D1, the second diode D2 and Absorption Capacitance C1；
The anode of the first diode D1 connects the resonant inductance Lr, the high-pressure side of the auxiliary power switching tube respectively,
The negative electrode of the first diode D1 connects the anode of the second diode D2, and the negative electrode connection of the second diode D2 is defeated
Go out to hold the positive pole of Vo；One end of the Absorption Capacitance C1 connects the anode of the output diode D, and the other end connects described respectively
The anode of the negative electrode of the first diode D1, the second diode D2.
7. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 6, its feature exists
In：The anode that the reverse current suppresses diode connects the resonant inductance Lr, the anode of the first diode D1 respectively,
The negative electrode that the reverse current suppresses diode is connected with the high-pressure side of the auxiliary power switching tube.
8. the Sofe Switch dc/dc boost converter for the collecting and distributing power supply of photovoltaic according to claim 6, its feature exists
In：The anode that the reverse current suppresses diode connects the resonant inductance Lr, and negative electrode connects first diode respectively
The high-pressure side of the anode of D1, the auxiliary power switching tube.
9. the Sofe Switch dc/dc boost for the collecting and distributing power supply of photovoltaic according to any one in claim 5~8 becomes
Parallel operation, it is characterised in that：Also include the controller unit being connected with the master power switch pipe, auxiliary power switching tube respectively,
The auxiliary power switch pipe unit, the resonant inductance Lr, resonant capacitance Cr composition are first opened in the controller unit control
Resonant tank complete resonant process after control open the master power switch pipe, then control to turn off the auxiliary power successively and open
Pipe unit, the master power switch pipe are closed, to complete the conversion of low pressure to high pressure.
10. the Sofe Switch dc/dc boost for the collecting and distributing power supply of photovoltaic according to any one in claim 5~8
Converter, it is characterised in that the master power switch pipe, auxiliary power switching tube are respectively IGBT power switch pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257346.5A CN106788215A (en) | 2016-12-30 | 2016-12-30 | For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611257346.5A CN106788215A (en) | 2016-12-30 | 2016-12-30 | For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic |
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| DE102017115000A1 (en) * | 2017-07-05 | 2019-01-10 | Hochschule Osnabrück | Photovoltaic unit, photovoltaic system, method for operating a photovoltaic unit and method for operating a photovoltaic system |
| CN109217660A (en) * | 2017-06-30 | 2019-01-15 | 株洲中车时代电气股份有限公司 | Dc/dc boost converter |
| CN109412197A (en) * | 2017-08-18 | 2019-03-01 | 丰郅(上海)新能源科技有限公司 | It can produce the voltage conversion circuit for photovoltaic module power optimization of carrier signal |
| CN110277912A (en) * | 2018-03-15 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of DC boosting translation circuit |
| CN114123803A (en) * | 2022-01-26 | 2022-03-01 | 深圳市羲和未来科技有限公司 | Voltage reduction isolation equipment compatible with household photovoltaic energy storage and mobile photovoltaic energy storage |
| CN114679049A (en) * | 2022-03-01 | 2022-06-28 | 浙江艾飞科电气科技有限公司 | High-efficiency zero-voltage conversion converter |
| CN116488456A (en) * | 2023-06-21 | 2023-07-25 | 深圳市恒运昌真空技术有限公司 | Voltage conversion circuit and voltage converter |
| US11894762B2 (en) | 2019-08-15 | 2024-02-06 | Huawei Digital Power Technologies Co., Ltd. | Direct current-direct current conversion circuit |
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| CN109217660A (en) * | 2017-06-30 | 2019-01-15 | 株洲中车时代电气股份有限公司 | Dc/dc boost converter |
| CN109217660B (en) * | 2017-06-30 | 2021-04-27 | 株洲中车时代电气股份有限公司 | DC/DC boost converter |
| DE102017115000A1 (en) * | 2017-07-05 | 2019-01-10 | Hochschule Osnabrück | Photovoltaic unit, photovoltaic system, method for operating a photovoltaic unit and method for operating a photovoltaic system |
| CN109412197A (en) * | 2017-08-18 | 2019-03-01 | 丰郅(上海)新能源科技有限公司 | It can produce the voltage conversion circuit for photovoltaic module power optimization of carrier signal |
| CN109412197B (en) * | 2017-08-18 | 2022-10-14 | 丰郅(上海)新能源科技有限公司 | Voltage conversion circuit capable of generating carrier signal and used for photovoltaic module power optimization |
| CN110277912A (en) * | 2018-03-15 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of DC boosting translation circuit |
| CN110277912B (en) * | 2018-03-15 | 2021-01-22 | 株洲中车时代电气股份有限公司 | Direct current boost conversion circuit |
| US11894762B2 (en) | 2019-08-15 | 2024-02-06 | Huawei Digital Power Technologies Co., Ltd. | Direct current-direct current conversion circuit |
| CN114123803A (en) * | 2022-01-26 | 2022-03-01 | 深圳市羲和未来科技有限公司 | Voltage reduction isolation equipment compatible with household photovoltaic energy storage and mobile photovoltaic energy storage |
| CN114679049A (en) * | 2022-03-01 | 2022-06-28 | 浙江艾飞科电气科技有限公司 | High-efficiency zero-voltage conversion converter |
| CN116488456A (en) * | 2023-06-21 | 2023-07-25 | 深圳市恒运昌真空技术有限公司 | Voltage conversion circuit and voltage converter |
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