CN109327135A - A kind of new energy resources system and its quasi- Z source switch capacitive transducer - Google Patents
A kind of new energy resources system and its quasi- Z source switch capacitive transducer Download PDFInfo
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- CN109327135A CN109327135A CN201811214874.1A CN201811214874A CN109327135A CN 109327135 A CN109327135 A CN 109327135A CN 201811214874 A CN201811214874 A CN 201811214874A CN 109327135 A CN109327135 A CN 109327135A
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- capacitor
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- diode
- capacitive transducer
- source switch
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Classifications
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
Abstract
The invention discloses a kind of quasi- Z source switch capacitive transducers, including switch module, the first inductance, the second inductance, first capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and third diode.As it can be seen that the gain of quasi- Z source switch capacitive transducer provided by the present application isHigh-gain can be realized at the lower duty cycle, realized high-gain without cascading, reduced the complexity and cost of circuit structure；In addition, also reducing the conduction loss of switching tube, the efficiency of quasi- Z source switch capacitive transducer is improved；And due to only one switch module in converter, control is simple.The present invention also provides a kind of new energy resources system, there is beneficial effect identical with above-mentioned quasi- Z source switch capacitive transducer.
Description
Technical field
The present invention relates to converter technical fields, become more particularly to a kind of new energy resources system and its quasi- Z source switch capacitor
Parallel operation.
Background technique
With the development of electric system, more and more new energy resources systems are linked into power grid, new energy resources system especially light
Volt and requirement of the fuel cell system to power electronic technique are also higher and higher.Since photovoltaic and cell of fuel cell have voltage low
The characteristics of, therefore, can just it be connected to the grid use after generally requiring the DC-DC converter lifting voltage of very high-gain.
The high-gain DC-DC converter used in the prior art often uses cascade connection type DC-DC converter, specifically, ask
Referring to Fig.1, Fig. 1 is the structural schematic diagram of traditional cascade connection type DC-DC converter, and the quasi-converter is even multistage by two-stage
Boost circuits cascading forms, on the one hand, duty ratio is bigger, and the energy storage inductor in the quasi-converter can reach magnetic saturation, Er Qiegong
Make under the mode of discontinuous current (DCM mode), it is big to will lead to current ripples, current spike occurs, control loop is difficult to design；
In addition, duty ratio is higher, the voltage stress of switching tube can also increase, therefore the loss switched also will increase, and reduce efficiency, because
This, which can not work under high duty ratio, therefore, it is impossible to realize high-gain；On the other hand, the quasi-converter is general
A large amount of electronic component is required, and at least through energy conversion twice, will increase power damage, therefore, the quasi-converter
There is also at high cost, low efficiency and the disadvantages of control complexity, are unfavorable for the effective use of new energy.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The object of the present invention is to provide a kind of new energy resources system and its quasi- Z source switch capacitive transducers, can be lower
High-gain is realized under duty ratio, is realized high-gain without cascading, is reduced the complexity and cost of circuit structure；This
Outside, the conduction loss of switching tube is also reduced, the efficiency of quasi- Z source switch capacitive transducer is improved；And due in converter
There is a switch module, control is simple.
In order to solve the above technical problems, the present invention provides a kind of quasi- Z source switch capacitive transducer, including switch module,
First inductance, the second inductance, first capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and
Third diode, in which:
The anode of the first end of first inductance and DC power supply connects, the first inductance second end respectively with it is described
The first end connection of the anode of first diode, second capacitor, the cathode of the first diode is respectively with described first
The first end of the second end of capacitor, the anode of the third diode and second inductance connects, and the of second inductance
Two ends connect with the second end of the second end of second capacitor, the first end of the switch module and the third capacitor respectively
It connects, the cathode of the third diode is connect with the anode of the second end of the 4th capacitor and load respectively, the 4th electricity
The first end of appearance connects with the anode of the negative terminal of the load, the first end of the third capacitor and second diode respectively
Connect, the cathode of second diode respectively with the second end of the switch module, the first end of the first capacitor and described
The connection of DC power supply negative terminal；
Wherein, the gain of the quasi- Z source switch capacitive transducerD is the driving signal of the switch module
Duty ratio.
Preferably, the switch module includes single switching transistor.
Preferably, the switch module includes the switching tube string of multiple parallel connections, and each switching tube string includes multiple strings
The switching tube of connection.
Preferably, the switching tube is IGBT or NMOS.
Preferably, the first capacitor, second capacitor, the third capacitor and the 4th capacitor are polarized
Capacitor, and the first capacitor, second capacitor, the third capacitor and the 4th capacitor first end be described to have
The negative terminal of polar capacitor, the first capacitor, second capacitor, the second end of the third capacitor and the 4th capacitor are equal
For the anode of the polarized capacitor.
In order to solve the above technical problems, the present invention also provides a kind of new energy resources system, including new energy DC power supply, also
Including quasi- Z source switch capacitive transducer as described above, the new energy DC power supply and the quasi- Z source switch capacitor are converted
Device connection.
Preferably, the new energy DC power supply is photovoltaic panel.
The present invention provides a kind of quasi- Z source switch capacitive transducers, including switch module, the first inductance, the second inductance,
One capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and third diode.
As it can be seen that the gain of quasi- Z source switch capacitive transducer provided by the present application isIt can be accounted for lower
Sky realizes high-gain than lower realization high-gain, without cascading, and reduces the complexity and cost of circuit structure；In addition,
The conduction loss of switching tube is also reduced, the efficiency of quasi- Z source switch capacitive transducer is improved；And due to there was only one in converter
A switch module, control are simple.
The present invention also provides a kind of new energy resources systems, have identical beneficial with above-mentioned quasi- Z source switch capacitive transducer
Effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of traditional cascade connection type DC-DC converter；
Fig. 2 is a kind of structural schematic diagram of quasi- Z source switch capacitive transducer provided by the invention；
Fig. 3 is working principle diagram of the quasi- Z source switch capacitive transducer provided by the invention when switch module is connected；
Fig. 4 is working principle diagram of the quasi- Z source switch capacitive transducer provided by the invention when switch module turns off；
Fig. 5 is the gain curve schematic diagram of quasi- Z source switch capacitive transducer provided by the invention；
The simulation waveform that Fig. 6 is the duty ratio D of quasi- Z source switch capacitive transducer provided by the invention when being 0.421.
Specific embodiment
Core of the invention is to provide a kind of new energy resources system and its quasi- Z source switch capacitive transducer, can be lower
High-gain is realized under duty ratio, is realized high-gain without cascading, is reduced the complexity and cost of circuit structure；This
Outside, the conduction loss of switching tube is also reduced, the efficiency of quasi- Z source switch capacitive transducer is improved；And due in converter
There is a switch module, control is simple.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to figure 2., Fig. 2 be a kind of structural schematic diagram of quasi- Z source switch capacitive transducer provided by the invention (in figure with
For switch module is NMOS, capacitor is polarized capacitor), which includes switch module S, the first inductance L1, second electricity
Feel L2, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4, first diode D1, the second diode D2And the
Three diode D3, in which:
First inductance L1First end connect with the anode of DC power supply Vin, the first inductance L1Second end is respectively with the one or two
Pole pipe D1Anode, the second capacitor C2First end connection, first diode D1Cathode respectively with first capacitor C1Second
End, third diode D3Anode and the second inductance L2First end connection, the second inductance L2Second end respectively with the second capacitor
C2Second end, the first end of switch module S and third capacitor C3Second end connection, third diode D3Cathode respectively with
4th capacitor C4Second end and load R anode connection, the 4th capacitor C4First end respectively with load R negative terminal, third electricity
Hold C3First end and the second diode D2Anode connection, the second diode D2Cathode respectively with switch module S second
End, the first end of first capacitor C1 and the connection of DC power supply Vin negative terminal；
Wherein, the gain of quasi- Z source switch capacitive transducerD is the duty of the driving signal of switch module S
Than.
Specifically, quasi- Z source switch capacitive transducer includes two kinds of operating modes according to the turn-on and turn-off of switch module S,
Working principle below with reference to Fig. 3 and Fig. 4 (in figure by taking switch module S is NMOS as an example) alignment Z source switch capacitive transducer is made
It introduces, wherein Fig. 3 is working principle diagram of the quasi- Z source switch capacitive transducer provided by the invention when switch module is connected, figure
4 working principle diagram for quasi- Z source switch capacitive transducer provided by the invention when switch module turns off, dotted portion are non-work
Make part, can be considered and be not present:
When switch module S conducting:
First diode D1With the second diode D2Shutdown, third diode D3It is open-minded, first capacitor C1Pass through " the first electricity
Hold C1- the second inductance L2The circuit switch module S " is to the second inductance L2Charging, the second inductance L2Electric current it is linearly increasing；
First inductance L1Pass through " the first inductance of DC power supply Vin- L with DC power supply Vin1- the second capacitor C2Switch module
The circuit S " is to the second capacitor C2Charging；
First capacitor C1With third capacitor C3Pass through " third capacitor C3Switch module S- first capacitor C1Third diode
D3- the four capacitor C4// circuit R " is loaded to the 4th capacitor C4It releases energy with load R.
When switch module S shutdown:
First diode D1With the second diode D2It is open-minded, third diode D3Shutdown, the first inductance L1And DC power supply
Vin passes through " the first inductance of DC power supply Vin- L1First diode D1First capacitor C1" circuit is to first capacitor C1Charging；
Second capacitor C2Pass through " the second capacitor C2First diode D1- the second inductance L2" circuit is to the second inductance L2Charging,
Second inductance L2Electric current it is linearly increasing；
First inductance L1, the second inductance L2Pass through " the first inductance of DC power supply Vin- L with DC power supply Vin1- the one two pole
Pipe D1- the second inductance L2Third capacitor C3- the second diode D2" circuit is to third capacitor C3Charging；
4th capacitor C4Pass through " the 4th capacitor C4The load circuit R " releases energy to load R.
It should be noted that the ratio of service time and cycle time are duty ratio D in switch module S a cycle；This
Outside, the application is for first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4, the first inductance L1With the second inductance L2
Value be not particularly limited, selected according to actual needs.
The gain of Z source switch capacitive transducer quasi- in the present embodiment is calculated below:
The duty ratio of the driving signal of switch module S in quasi- Z source switch capacitive transducer is D, in one cycle, quasi-
The output voltage of Z source switch capacitive transducer is Vo(load the voltage V of Ro), DC power supply Vin voltage is Vin, then:
When switch module S is opened:
First inductance L1Voltage VL1Are as follows:
Wherein, VC2For the second capacitor C2Voltage, the first inductance L1Electric current it is linearly increasing；
Second inductance L2Voltage VL2Are as follows:
Wherein, VC1For first capacitor C1Voltage, the second inductance L2Electric current it is linearly increasing；
The output voltage V of quasi- Z source switch capacitive transduceroAre as follows:
When switch module S shutdown:
First inductance L1Voltage VL1Are as follows:
Second inductance L2Voltage VL2Are as follows:
Third capacitor C3Voltage are as follows:
When circuit is in steady operation, according to formula (1), formula (2), formula (4), formula (5) and the first inductance L1, the second inductance
L2Voltage-second balance theorem have:
Wherein, T is the time of a cycle of the driving signal of switch module S；
Joint type (7) and formula (8), solve:
Joint type (6), formula (9) and formula (10) have:
Joint type (3), formula (9) and formula (11) have:
Due to the ratio that circuit gain is output voltage and input voltage, then quasi- Z source switch capacitor transformation in the present embodiment
The gain G of device are as follows:
Referring to figure 5., Fig. 5 is the gain curve schematic diagram of quasi- Z source switch capacitive transducer provided by the invention.
To verify to quasi- Z source switch capacitive transducer provided in this embodiment, the application has also built shown in Fig. 2
Artificial circuit, Simulation Parameters therein are as follows:
L1=L2=470uH, C1=C2=C3=C4=220uF, Vin=20V, R=200 Ω；
When duty ratio is selected as 0.421, simulation result at this time as shown in fig. 6, DC-DC converter output voltage Vo
For 200V, the gain G of DC-DC converter is 10, meets the gain curve of Fig. 5.
As it can be seen that higher increasing can be realized with the duty ratio lower than 0.5 in the quasi- Z source switch capacitive transducer in the present embodiment
Beneficial G reduces the conduction loss of switching tube, improves the efficiency of quasi- Z source switch capacitive transducer.And with grade in the prior art
Connection type DC-DC converter is compared, and the circuit structure of the quasi- Z source switch capacitive transducer in the present embodiment is simple, at low cost.And by
Only one switch module S in converter, control are simple.
On the basis of the above embodiments:
As a kind of preferred embodiment, switch module S includes single switching transistor.
It should be noted that in actual application, if the electric current in boosting is smaller, switch module S can only by
One switching tube composition, to save cost, simplifies the circuit structure of quasi- Z source switch capacitive transducer.
As a kind of preferred embodiment, switch module S includes the switching tube string of multiple parallel connections, and each switching tube string includes
Multiple concatenated switching tubes.
In actual application, if the electric current in boosting is larger, in order to avoid damaging switch module S, quasi- Z is improved
The safety of source switch capacitive transducer, switch module S can be made of in series and parallel multiple switch pipe, thus be suitable for high current and
The scene of big voltage.
As a kind of preferred embodiment, switching tube is IGBT or NMOS.
NMOS (N-Metal-Oxide-Semiconductor, N-type Metal-oxide-semicondutor) is one in switching tube
Kind, on one piece of lower P-type silicon substrate of doping concentration (offer can largely move hole), make the N+ of two high-dopant concentrations
Area (has in the region N+ and largely provides the electron source of free electron for electric current flowing), and draws two electrodes with metallic aluminium, respectively
Make drain electrode and source electrode, then cover one layer of very thin silica (SiO2) insulating layer in semiconductor surface, leaking --- source electrode
Between insulating layer on be loaded on an aluminium electrode (usually polysilicon), as grid, on substrate also draw an electrode, this
Just constitute the enhanced metal-oxide-semiconductor of N-channel.NMOS has the advantages that switching speed is fast, switching loss is small.
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) is (double by BJT
Polar form triode) and MOS (insulating gate type field effect tube) composition compound full-control type voltage driven type power semiconductor, it is simultaneous
There is advantage of both the high input impedance of MOSFET and the low conduction voltage drop of GTR.
Other than NMOS and IGBT, switching tube can also be other kinds of switching tube, basis in actual application
It is selected.
As a kind of preferred embodiment, first capacitor C1, the second capacitor C2, third capacitor C3And the 4th capacitor C4It is
Polarized capacitor, and first capacitor C1, the second capacitor C2, third capacitor C3And the 4th capacitor C4First end be polarized electricity
The negative terminal of appearance, first capacitor C1, the second capacitor C2, third capacitor C3And the 4th capacitor C4Second end be polarized capacitor
Anode.
Specifically, the capacity of polarized capacitor is bigger, can be suitable for the occasion of high voltage and high power, certainly, the application
In can also select polarity free capacitor, the application is not particularly limited herein, determines according to the actual situation.
It further include that the quasi- source Z as above-mentioned is opened the present invention also provides a kind of new energy resources system, including new energy DC power supply
Capacitive transducer is closed, new energy DC power supply is connect with quasi- Z source switch capacitive transducer.
Specifically, the new energy resources system of the application includes new energy DC power supply, has reproducibility and environmental pollution small
The advantages that.The voltage of new energy DC power supply output is load supplying after the boosting of quasi- Z source switch capacitive transducer, has height
Gain, the advantage that high-efficient, circuit structure is simple, at low cost and control is simple.
As a kind of preferred embodiment, new energy DC power supply is photovoltaic panel.
Specifically, the energy for including in sunlight is converted into electric energy by photoelectric conversion by photovoltaic panel, is not polluted the environment,
Energy shortage will not occur.Certainly, new energy power supply here can also be other kinds of new energy power supply, such as wind-force
Solar panel, the application are not particularly limited herein.
Above-mentioned converter embodiment please referred to for the introduction of new energy resources system provided by the invention, the present invention is herein no longer
It repeats.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of quasi- Z source switch capacitive transducer, which is characterized in that including switch module, the first inductance, the second inductance, first
Capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode and third diode, in which:
The anode of the first end of first inductance and DC power supply connects, and the first inductance second end is respectively with described first
The anode of diode, second capacitor first end connection, the cathode of the first diode respectively with the first capacitor
Second end, the third diode anode and second inductance first end connection, the second end of second inductance
It is connect respectively with the second end of the second end of second capacitor, the first end of the switch module and the third capacitor, institute
The cathode for stating third diode is connect with the anode of the second end of the 4th capacitor and load respectively, and the of the 4th capacitor
One end is connect with the anode of the negative terminal of the load, the first end of the third capacitor and second diode respectively, described
The cathode of second diode respectively with the second end of the switch module, the first end of the first capacitor and the DC power supply
Negative terminal connection；
Wherein, the gain of the quasi- Z source switch capacitive transducerD is accounting for for the driving signal of the switch module
Empty ratio.
2. quasi- Z source switch capacitive transducer as described in claim 1, which is characterized in that the switch module includes individually opening
Guan Guan.
3. quasi- Z source switch capacitive transducer as described in claim 1, which is characterized in that the switch module include it is multiple simultaneously
The switching tube string of connection, each switching tube string include multiple concatenated switching tubes.
4. quasi- Z source switch capacitive transducer as claimed in claim 2 or claim 3, which is characterized in that the switching tube be IGBT or
NMOS。
5. quasi- Z source switch capacitive transducer as described in claim 1, which is characterized in that the first capacitor, second electricity
Hold, the third capacitor and the 4th capacitor are polarized capacitor, and the first capacitor, second capacitor, described
The first end of third capacitor and the 4th capacitor is the negative terminal of the polarized capacitor, the first capacitor, described second
The second end of capacitor, the third capacitor and the 4th capacitor is the anode of the polarized capacitor.
6. a kind of new energy resources system, which is characterized in that further include such as any one of claim 1-5 including new energy DC power supply
The quasi- Z source switch capacitive transducer, the new energy DC power supply are connect with the quasi- Z source switch capacitive transducer.
7. new energy resources system as claimed in claim 6, which is characterized in that the new energy DC power supply is photovoltaic panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811214874.1A CN109327135A (en) | 2018-10-18 | 2018-10-18 | A kind of new energy resources system and its quasi- Z source switch capacitive transducer |
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| CN201811214874.1A CN109327135A (en) | 2018-10-18 | 2018-10-18 | A kind of new energy resources system and its quasi- Z source switch capacitive transducer |
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| CN110165921A (en) * | 2019-05-27 | 2019-08-23 | 江苏大学 | One kind having the quasi- Z-source inverter of high output voltage gain switch inductive type |
| CN110635684A (en) * | 2019-09-09 | 2019-12-31 | 南通大学 | Single-tube quasi-Z-source Boost converter |
| CN111162672A (en) * | 2020-01-15 | 2020-05-15 | 广东工业大学 | DC-DC converter based on X-type switch network and switch power supply |
| CN111525794A (en) * | 2020-04-30 | 2020-08-11 | 广东电网有限责任公司 | Voltage accumulation type high-gain DC-DC converter |
| CN112104228A (en) * | 2020-08-21 | 2020-12-18 | 哈尔滨工业大学 | Boost converter with high gain and low voltage stress of switching tube |
| CN113300595A (en) * | 2021-05-27 | 2021-08-24 | 广东工业大学 | Electrolytic capacitor removing method of boost converter and improved boost converter |
| CN113676047A (en) * | 2021-09-09 | 2021-11-19 | 上海交通大学 | Expandable switch capacitor bidirectional DC-DC converter and control method |
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| CN110165921A (en) * | 2019-05-27 | 2019-08-23 | 江苏大学 | One kind having the quasi- Z-source inverter of high output voltage gain switch inductive type |
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| CN111162672A (en) * | 2020-01-15 | 2020-05-15 | 广东工业大学 | DC-DC converter based on X-type switch network and switch power supply |
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| CN112104228A (en) * | 2020-08-21 | 2020-12-18 | 哈尔滨工业大学 | Boost converter with high gain and low voltage stress of switching tube |
| CN113300595A (en) * | 2021-05-27 | 2021-08-24 | 广东工业大学 | Electrolytic capacitor removing method of boost converter and improved boost converter |
| CN113300595B (en) * | 2021-05-27 | 2023-03-10 | 广东工业大学 | Electrolytic capacitor removing method of boost converter and improved boost converter |
| CN113676047A (en) * | 2021-09-09 | 2021-11-19 | 上海交通大学 | Expandable switch capacitor bidirectional DC-DC converter and control method |
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