CN103532409B - Three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation - Google Patents
Three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation Download PDFInfo
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Abstract
The invention discloses a three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation. The circuit comprises a three-phase AC (Alternating Current) power supply, filtering capacitors C1, C2 and C3, a three-phase single-switch BOOST rectifying circuit, three flyback voltage-multiplying rectifying circuits, a signal acquisition circuit and a control circuit; the three-phase single-switch BOOST rectifying circuit comprises an uncontrollable rectifier bridge and a BOOST booster circuit; a three-phase single switch VT is controlled to be switched on and off by adopting a pulse frequency modulation (PFM) technology; an output voltage of the integral three-phase single-switch BOOST voltage-multiplying rectifying circuit is the sum of voltages on output capacitors Ca, Cb and Cc of a three-phase voltage-multiplying circuit and an output capacitor Co of a main circuit, so that the rectified output voltage is improved. Compared with the prior art, the rectifying circuit has the characteristics of high efficiency, high output voltage and the like compared with a conventional three-phase uncontrollable rectifying circuit and is very suitable for being used under the conditions with a lower wind speed and difficulty and high requirements on energy harvesting.
Description
Technical field
The present invention relates to small-sized wind power generator translation circuit technical field, more particularly to a kind of new can realizing
Inverse-excitation type multiplication of voltage, have greater efficiency, can be with the rectification circuit of normal work when blower fan output voltage is relatively low.
Background technology
Wind energy is a kind of novel energy, and it has renewable, pollution-free, the low advantage of cost of investment, is that nowadays the energy is tight
Open a kind of clean energy resource that can fully be studied and be utilized under situation.In many countries and regions, wind-power electricity generation has accounted for
According to a big chunk proportion of generating total amount, bring great convenience and economic interests, therefore, to wind generating technology
Research has great significance.However, the application of wind-power electricity generation affected by geographical position larger, in some lean wind, few wind
Area, because wind speed is relatively low, the output voltage of wind turbine power generation machine relatively low it is impossible to enough Collection utilization well, cause substantial amounts of energy
Amount loss.Therefore, it is necessary to improve to original wind-driven generator rectification circuit so as to have higher voltage gain,
Improve the input voltage amplitude of rectification outlet side.
Traditional small-sized wind power generator rectification circuit has several circuit structures, and wherein original rectification circuit is three
Mutually can not control rectifying circuit, its advantage is that structure is simple, and cost is relatively low, is widely used, but does not have and improve voltage magnitude
Function；But also power loss is big, cisco unity malfunction under rectification efficiency is low, input current waveform distorts serious, low wind speed
The shortcomings of.
Traditional blower fan rectification circuit also has using PWM rectifier circuit structure, and this circuit adopts power switch pipe to replace not
Diode in control rectifier bridge, is controlled by switch tube, realizes the rectified action of the three-phase alternating current to blower fan output.
Ideal input current waveform can be obtained by using this rectification circuit, and then realize unity power factor control making
With the rectification efficiency of circuit greatly improves.But this circuit increases due to employing multiple power switch pipes, the cost of circuit
Plus, in the case of considering cost, it is not easy to promote, and this rectification circuit does not enable to lift the work(of output voltage amplitude
Can, still can not be fully solved three-phase can not output voltage existing for control rectifying circuit relatively low the problems such as.
According to the problems referred to above, in order to realize improving output voltage amplitude and improve the targets such as blower fan rectification efficiency, need
The little blower fan boost rectifying circuit topological structure that research performance more preferably has broad application prospects with practical value.
Content of the invention
For the problem overcoming prior art to exist, the present invention proposes a kind of small-size wind power-generating three-phase flyback times
Pressure Single switch rectification circuit, this circuit rectification side adopt triphase single-switch boost rectification circuit, even if uncontrollable rectifier bridge with
Boost booster circuit combines, and in generator three-phase outlet side, often mutually increases a reverse coupled inductance, coupling inductance former
Avris and main circuit connect through and control the switch of the MOSFET pipe in boost circuit to make input current substantially assume sine wave ripple
Shape, improves the efficiency of circuit；Secondary side adopts inverse-excitation type voltage-multiplying circuit, and voltage-multiplying circuit outlet side voltage can be with output capacitance
Voltage represent.Each phase of so three phase mains just constitutes a single inverse-excitation type voltage-multiplying circuit, constitutes altogether three times
Volt circuit, by the output capacitance series connection of three voltage-multiplying circuits, the output voltage of whole rectification circuit can be with three voltage-multiplying circuits
Output voltage is represented with main circuit output voltage sum, so that voltage is raised further.
The present invention proposes a kind of small-size wind power-generating three-phase flyback multiplication of voltage Single switch rectification circuit, this circuit according to
Input, output order include three-phase alternating-current supply, filter capacitor C1, C2, C3, triphase single-switch BOOST rectification circuit, three contrary
Sharp formula voltage-multiplying circuit, signal acquisition circuit and control circuit；Wherein：
Described three-phase alternating-current supply input side is connected with the output of wind-driven generator three-phase；
Described triphase single-switch BOOST rectification circuit, including uncontrollable rectifier bridge and BOOST booster circuit, described
Uncontrollable rectifier bridge is made up of 6 diode D1～D6；Described BOOST booster circuit is by three-phase reverse coupled inductance T1, T2, T3
BOOST inductance, triphase single-switch VT, diode D7 and BOOST booster circuit output capacitance Co composition, BOOST inductance concatenate
Exchange input side, each mutually one BOOST inductance of concatenation in rectifier bridge；In described triphase single-switch BOOST rectification circuit, can not
The outlet side of control rectifier bridge is directly linked together with the Single switch of BOOST rectification circuit；Described control circuit is to BOOST rectification
Single switch VT in circuit carries out on/off control, makes rectification input side current waveform level off to sine wave, to realize unit power
Factor controls, and this triphase single-switch VT adopts PFM to control and MPPT maximum power point tracking controls simultaneously, makes operating point be maintained at blower fan
At peak power；
Described three-phase flyback voltage-multiplying circuit, the inverse-excitation type voltage-multiplying circuit of wherein any one phase includes reverse coupled electricity
Sense, inverse-excitation type voltage-multiplying circuit output capacitance, first, second switching capacity and inverse-excitation type voltage-multiplying circuit diode, first, second 2
Pole pipe；Wherein：Inverse-excitation type voltage-multiplying circuit diode, first switch electric capacity, reverse coupled inductance secondary, second switch electric capacity, anti-
Sharp formula voltage-multiplying circuit output capacitance loop in series；After one end series connection of first switch electric capacity and reverse coupled inductance secondary,
Again with the first diodes in parallel；After the other end of reverse coupled inductance secondary and second switch capacitances in series, then with the two or two pole
Pipe is in parallel；
When switching tube VT turns on, in any one phase in three-phase flyback multiplication of voltage Single switch rectification circuit, by reverse
Coupling inductance former limit, uncontrollable rectifier bridge, switching tube VT constitute loop, and this phase power supply fills to reverse coupled inductance former limit inductance
Electricity, electric current rises；Simultaneously reverse coupled inductance secondary inductance passes through the first diode and the second diode respectively to first
Switching capacity and second switch electric capacity charge, and first, second switching capacity voltage rises；When switching tube VT turns off, this phase
In by power supply, reverse coupled inductance former limit inductance, uncontrollable rectifier bridge, diode D7, BOOST booster circuit output capacitance Co structure
Become loop, now, this phase power supply and reverse coupled inductance former limit inductance fill to BOOST booster circuit output capacitance Co jointly
Electricity, this phase input current reduces；Now, reverse coupled inductance secondary current is reverse, inverse-excitation type voltage-multiplying circuit diode current flow,
Reverse coupled inductance secondary, first, second switching capacity are jointly to the inverse-excitation type voltage-multiplying circuit of this phase inverse-excitation type voltage-multiplying circuit
Output capacitance charges, and the voltage of inverse-excitation type voltage-multiplying circuit output capacitance raises；Output capacitance by three-phase flyback voltage-multiplying circuit
With the series connection of BOOST booster circuit output capacitance Co, the output voltage of whole triphase single-switch BOOST voltage doubling rectifing circuit is three-phase
Voltage sum in inverse-excitation type voltage-multiplying circuit output capacitance and BOOST booster circuit output capacitance Co, thus rectification is exported electricity
Pressure improves.
Described control circuit rectification side adopts pulse frequency to control PFM technology, including multiplier, MPPT controller, voltage-controlled
Oscillator VCO, trigger and a driving amplifier, its course of work is：Whole first feedback control loop is first defeated from rectifier bridge
Go out side sampling average anode current and output voltage, obtain power output signal through multiplier, defeated as MPPT controller
Enter signal, control circuit is simultaneously controlled according to the power signal being inputted, output one variable level signal is to control voltage-controlled shaking
Swing device VCO, VCO exports the sine wave of corresponding frequencies according to the amplitude of input voltage, when trigger forms a series of conducting
Between ton constant, the square wave that cycle T changes with sine-wave synchronous, realize PFM control, eventually pass drive amplification circuit control open
Close the break-make of pipe；The algorithm of MPPT controller adopts disturbance observation method, by the power output that gathers this and the phase of last time
Relatively to determine increase or reduction output voltage to realize MPPT；ΔPo＞ 0, illustrates that power output does not reach maximum,
Continue increase output voltage to be tracked；If Δ Po＜ 0, then situation contrast, until Δ Po=0, now, wind-driven generator
Power output be in maximum power point.
Compared with prior art, the invention has the advantages that：
1st, this rectification circuit compared with conventional three-phase can not control rectifying circuit have efficiency high, output voltage high the features such as, very
It is suitable for wind speed relatively low, collection of energy difficulty uses in the case of having high demands.
2nd, the present invention adopts MPPT to control, it is possible to achieve maximal power tracing controls, real-time detection output voltage, electric current
Value, makes operating point be near maximum power output value, improves the utilization rate of wind energy.Further, since using peak power with
Track, can improve the collection of energy under low wind speed and transmittability；
3rd, the amplitude that wind-driven generator operationally can be exported by the present invention, the alternating current of frequency change are made through unsteady flow
Used with being delivered directly to electrical network.Input current is sine wave, output current ripple is less, the more high and low wind speed of transducer effciency
The advantages of with can normally use under high wind speed.In a word, no matter for electrical network or blower fan system, the present invention has long-pending
The application value of pole.
Brief description
Fig. 1 is the little blower fan rectification circuit figure of triphase single-switch BOOST- inverse-excitation type multiplication of voltage；
Fig. 2 is A phase (a certain moment) inverse-excitation type voltage-doubling boost circuit diagram；
Fig. 3 is inverse-excitation type voltage-multiplying circuit working waveform figure；
Fig. 4 small-size wind power-generating course of work in three-phase flyback one work period of multiplication of voltage Single switch rectification circuit
Figure, (a), process 1；(b), process 2；(c), process 3；(d), process 4；(e), process 5；
Fig. 5 rectification side control system block diagram；
Fig. 6 rectification side input current, input voltage waveform figure；
Fig. 7 outlet side output voltage waveform.
Specific embodiment
With reference to the accompanying drawings and examples, further describe the specific embodiment of the present invention.
Describe composition and the composition of the present invention first in detail, Fig. 1 is applied to small-sized wind power generator for what the present invention stated
Triphase single-switch BOOST- inverse-excitation type voltage doubling rectifing circuit structure chart.
With reference to Fig. 1, the voltage-doubler rectifier that the present invention provides is by three phase mains, filter capacitor C1, C2, C3, triphase single-switch
BOOST rectification circuit, three inverse-excitation type voltage-multiplying circuits, signal acquisition circuit and control circuit composition.Wherein triphase single-switch
BOOST rectification circuit is made up of uncontrollable rectifier bridge and BOOST booster circuit.Described uncontrollable rectifier bridge is by 6 diode (D1
～D6) composition, exchange input side and be connected with the output of wind-driven generator three-phase, rectification outlet side is direct and BOOST rectification circuit
Single switch VT links together.The effect of rectifier bridge is that the three-phase alternating current electric rectification being continually changing the frequency of little blower fan output is
Direct current, and export to next stage.Described BOOST booster circuit is by transformer T1, the former limit inductance (BOOST inductance) of T2, T3, list
Switch VT, diode D7 and DC capacitor Co composition.BOOST inductance does not directly connect with switching tube VT, but concatenation
Exchange input side in rectifier bridge.
During normal work, because the switching frequency of Single switch VT is much larger than the frequency of wind-driven generator output voltage, so
In a cycle of BOOST normal circuit operation, input voltage can regard a steady state value as.It is more than zero with input voltage
When in case of, when Single switch VT opens, generator output three-phase alternating current through transformer former limit inductance, rectifier bridge and
Switching tube VT constitutes loop, and to BOOST induction charging；When Single switch VT disconnects, through three phase mains, BOOST inductance, rectification
Bridge, diode D7 and DC bus capacitor Co constitute loop, are jointly carried out to main circuit output capacitance Co from blower fan and BOOST inductance
Charge.
Described inverse-excitation type voltage-multiplying circuit (taking A phase as a example) by reverse coupled inductance T1, storage capacitor Ca, switching capacity C11,
C12 and diode Da, D11, D12 form, as shown in figure 1, wherein, diode Da, switching capacity C11, coupling inductance secondary, open
Close electric capacity C12, storage capacitor Ca loop in series；Diode D11 is in parallel with switching capacity C11 and coupling inductance secondary；Two
Pole pipe D12 is in parallel with coupling inductance secondary and switching capacity C12.
As shown in figure 1, taking A phase as a example, because the switching frequency of switch mosfet pipe VT is far longer than the frequency of three phase mains
Rate, so in switch periods, the voltage of three phase mains can be regarded as a constant.When switching tube VT turns on, in A phase
Loop is constituted by transformer T1 former limit, uncontrollable rectifier bridge, switching tube VT, A phase power supply to T1 former limit induction charging, on electric current
Rise；Simultaneously transformer secondary inductance passes through diode D11 and diode D12 respectively to switching capacity C11 and switching capacity
C12 charges, and electric capacity C11, C12 voltage rises.When switching tube VT turns off, by power supply, transformer T1 former limit inductance, no in A phase
Controllable rectifier bridge, diode D7, main circuit output capacitance Co constitute loop, and now, A phase power supply and T1 former limit inductance are jointly to defeated
Go out electric capacity Co to charge, A phase input current reduces；Now, reversely, diode Da turns on transformer T1 secondary current, transformer T1
Secondary, switching capacity C11, C12 charges to output capacitance Ca of A phase voltage-multiplying circuit jointly, and the voltage of electric capacity Ca raises.B phase and C
The operation principle of phase can be analyzed with similar method, as shown in figure 1, by output capacitance Ca of ABC three-phase voltage-multiplying circuit, Cb,
Cc and the series connection of main circuit output capacitance Co, the output voltage of whole triphase single-switch BOOST- voltage doubling rectifing circuit can use ABC
Output capacitance Ca of three-phase voltage-multiplying circuit, the voltage sum on Cb, Cc and main circuit output capacitance Co represents, thus rectification is defeated
Go out voltage to improve.
Signal sample circuit is divided into voltage signal acquisition circuit and two kinds of current signal Acquisition Circuit again.Voltage signal acquisition
Circuit Real-time Collection rectification side rectifier bridge exports DC voltage.Current signal Acquisition Circuit Real-time Collection rectification side rectifier bridge exports
DC current.
Analyze the specific work process in the A phase a certain moment for the inverse-excitation type voltage-doubling boost circuit below according to Fig. 2, Fig. 3, Fig. 4.
As shown in Fig. 2 being A phase (a certain moment) inverse-excitation type voltage-doubling boost circuit diagram, wherein：Lk1、Lk2It is respectively the former and deputy of transformer
Side leakage inductance, LmFor the magnetizing inductance of transformer, n is the no-load voltage ratio of transformer, Cs1Parasitic capacitance for switching tube.As Fig. 3, VGSFor opening
Close pipe control signal, iAFor A phase primary current, iaFor secondary current, ic11、ic12The electric current flowing through for electric capacity C11, C12.
Process 1 [t0,t1]：In t0Moment switching tube VT turns on, such as shown in Fig. 3, Fig. 4 (a), now due to A phase secondary inductance
Afterflow, diode Da turns on, transformer secondary inductance, switching capacity C11, and C12 continues through diode Da and exports to A phase multiplication of voltage
Electric capacity Ca charges, ic11、ic12It is changed into 0 from negative value；Meanwhile, primary current begins to ramp up to t from 01In the moment, process 1 terminates.
Process 2 [t1,t2]：In t1The electric current that moment C11, C12 flow through is 0, such as shown in Fig. 3, Fig. 4 (b), because power supply is to A
Phase former limit inductance, i.e. leakage inductance Lk1Charge, therefore A phase primary current rises to t2Moment reaches peak value；Secondary inductance then passes through respectively
Diode D11, D12 charge to switching capacity C11, C12, shown in the sense of current such as Fig. 4 (b), ic11、ic12Rise to t2Moment reaches
To positive peak value.
Process 3 [t2,t3]：In t2Moment switching tube VT turns off, such as shown in Fig. 3, Fig. 4 (c), now diode D7 conducting, and main
In circuit, power supply and mutual inductance former limit inductance pass through diode D7 and charge to main circuit output capacitance Co, and main circuit current declines, that is,
iADecline；Now, because transformer secondary leakage inductance afterflow acts on, the sense of current can not be mutated, and secondary inductance is still to switch electricity
Hold C11, C12 to charge, shown in the sense of current such as Fig. 4 (c), ic11、ic12Decline, to t3Moment is reduced to 0.
Process 4 [t3,t4]：As shown in Fig. 3, Fig. 4 (d), now diode Da conducting, ic11、ic12For negative value, i.e. transformer
Secondary inductance, switching capacity C11, C12 pass through diode Da to A phase multiplication of voltage output capacitance Ca charge, due to transformer former limit to
Secondary transmits energy, therefore, ic11、ic12Reversely rise to t4Moment reaches reversed peak；Now main circuit continues to electric capacity Co
Charge, iAContinue to decline up to t4Moment will be 0.
Process 5 [t4,t5]：As shown in Fig. 3, Fig. 4 (e), in this period, switching tube VT is held off, and main circuit current is
0；Voltage-multiplying circuit will be by transformer secondary inductance, switching capacity C11, and C12 is filled to A phase multiplication of voltage output capacitance Ca by diode Da
Electricity, ic11、ic12Absolute value decline, until t5Moment enters next cycle, completes the work of a cycle.
Within a work period, multiplication of voltage output capacitance Ca and main circuit output capacitance Co persistently power to the load, entirely
The output voltage of circuit can be regarded as a steady state value.
Control circuit is controlled to the Single switch in rectification side BOOST circuit.As Fig. 5, rectification side adopts pulse frequency
Control (PFM) technology, including a multiplier, MPPT controller, voltage controlled oscillator VCO, trigger and a driving amplifier.
Its course of work is：Whole first feedback control loop is first from rectifier bridge outlet side sampling average anode current and output voltage, warp
Cross multiplier and obtain power output signal, as the input signal of MPPT controller, and carried out according to the power signal being inputted
Control, to control voltage controlled oscillator VCO, VCO exports corresponding frequencies according to the amplitude of input voltage to output one variable level signal
Sine wave, form through trigger that a series of ON time ton are constant, the side that cycle T (frequency) changes with sine-wave synchronous
Ripple, realizes PFM control, eventually passes the break-make of drive amplification circuit controling switch pipe.The algorithm of MPPT controller adopts and " climbs the mountain
Method " (also known as interference and observation, P＆O), by power output that this is gathered and last time compare relatively to determine increase or
Person reduces output voltage to realize MPPT.If Δ Po＞ 0, illustrates that power output does not reach maximum, continues to increase output electricity
It is pressed into line trace；If Δ Po＜ 0, then situation contrast, until Δ Po=0, now, the power output of wind-driven generator is in
Maximum power point.
The pulse frequency that rectification side adopts controls (PFM) technology, and its control principle block diagram is as shown in figure 3, MPPT
(Maximum power point tracking) refers to maximal power tracing controller, being capable of real-time detection output voltage, electricity
Flow valuve, and follow the trail of maximum power output value (Po)；VCO (Voltage-controlled Oscillator) is voltage controlled oscillator,
Its frequency of oscillation is controlled by input voltage (namely maximal power tracing controller output), by the control of MPPT unit
Real-time regulation can be carried out to its frequency of oscillation.Therefore whole feedback control loop is first from rectifier bridge outlet side sampling direct current output electricity
Stream and output voltage, obtain power output signal through multiplier, follow the tracks of maximum power point through MPPT controller, and export one
To control voltage controlled oscillator VCO, VCO exports the sine wave of corresponding frequencies, warp according to the amplitude of input voltage to variable level signal
Cross trigger and form that a series of ON time ton are constant, the square wave that cycle T (frequency) changes with sine-wave synchronous, realize PFM control
System, eventually passes the break-make of drive amplification circuit controling switch pipe.
This rectification circuit can realize three-phase active power factor correction (APFC) function of Single switch pipe, also may be used simultaneously
To realize BOOST type maximal power tracing (MPPT) controller function it is achieved that the multiplexing on same circuit of two kinds of functions.
Wherein, this circuit pass through controlling switch pipe ON time constant it is achieved that Single switch pipe three-phase active power factor correction
(APFC) function is it is ensured that inductive current peak envelope sineization, thus improving electric power generation efficiency and service life.This circuit
Difference with conventional three-phase APFC is：Before transformer former limit inductance (energy storage inductor) is placed in commutation diode；Define and singly open
Close tubular construction；It is integrated with MPPT function；There is multiplication of voltage effect.This circuit with the difference of traditional MPPT controller is：It is integrated with
AFPC function, energy storage inductor position, before commutation diode, has voltage multiplying rectifier effect.
Compared with prior art, beneficial effects of the present invention and advantage are：
1st, this circuit main circuit is combined with BOOST booster circuit using not controlling bridge rectifier, input side electric current base
Ripple assumes sine wave, and power factor is high, and Single switch controls simply simultaneously, and cost is relatively low.Input side often mutually increases an inductance (mutually
Sensor former limit inductance) composition Active Power Factor Correction Converter.Rectification side A phase input current waveform, input voltage waveform are such as
Shown in Fig. 6.It can be seen that input current is discontinuously, its envelope is sine, and with output electrical network same-phase it is achieved that unit power
Factor controls, and rectifying part efficiency is more traditional can not control rectifier to improve a lot.
2nd, the present invention increases an inverse-excitation type voltage-multiplying circuit in the input side of each phase, and each phase can produce an output
Voltage, the gain of voltage is relevant with the turn ratio of transformer, and by the output capacitance series connection of each phase, total output voltage is defeated by three-phase
Go out capacitance voltage and main circuit output capacitance voltage sum represents, greatly improve the amplitude of output voltage.Therefore this circuit is permissible
Wind speed is relatively low, blower fan output three-phase voltage relatively low in the case of still can export higher DC voltage and supply next stage use.
Rectifier output voltage waveform is as shown in Figure 7.
In sum, a kind of grid-connection converter being applied to small-sized wind power generator disclosed by the invention, permissible during work
The amplitude that wind-driven generator is exported, the alternating current of frequency change are delivered directly to electrical network through unsteady flow effect and use.Input electricity
Flow for sine wave, output current ripple be less, under the more high and low wind speed of transducer effciency and high wind speed can normally using etc. excellent
Point.In a word, no matter for electrical network or blower fan system, the present invention has positive application value.
Claims (2)
1. a kind of small-size wind power-generating three-phase flyback multiplication of voltage Single switch rectification circuit is it is characterised in that this circuit is according to defeated
Enter, output order includes three-phase alternating-current supply, filter capacitor C1, C2, C3, triphase single-switch BOOST rectification circuit, three-phase flyback
Formula voltage-multiplying circuit, signal acquisition circuit and control circuit；Wherein：
Described three-phase alternating-current supply input side is connected with the output of wind-driven generator three-phase；
Described triphase single-switch BOOST rectification circuit, including uncontrollable rectifier bridge and BOOST booster circuit, described can not
Control rectifier bridge is made up of 6 diode D1～D6；Described BOOST booster circuit is by three-phase reverse coupled inductance T1, T2, T3
BOOST inductance, triphase single-switch VT, diode D7 and BOOST booster circuit output capacitance Co composition, BOOST inductance is serially connected in
Rectifier bridge exchanges input side, each mutually one BOOST inductance of concatenation；In described triphase single-switch BOOST rectification circuit, uncontrollable
The outlet side of rectifier bridge is directly linked together with the Single switch of BOOST rectification circuit；Described control circuit is to BOOST rectified current
Single switch VT in road carries out on/off control, makes rectification input side current waveform level off to sine wave, with realize unit power because
Numerical control system, this triphase single-switch VT adopts PFM to control and MPPT maximum power point tracking controls simultaneously, makes operating point be maintained at blower fan
High-power place；
Described three-phase flyback voltage-multiplying circuit, the inverse-excitation type voltage-multiplying circuit of wherein any one phase includes reverse coupled inductance, anti-
Sharp formula voltage-multiplying circuit output capacitance, first, second switching capacity and inverse-excitation type voltage-multiplying circuit diode, first, second diode；
Wherein：Inverse-excitation type voltage-multiplying circuit diode, first switch electric capacity, reverse coupled inductance secondary, second switch electric capacity, inverse-excitation type times
Volt circuit output capacitance loop in series；After one end series connection of first switch electric capacity and reverse coupled inductance secondary, then with the
One diodes in parallel；After the other end of reverse coupled inductance secondary and second switch capacitances in series, then with the second diodes in parallel；
When switching tube VT turns on, in any one phase in three-phase flyback multiplication of voltage Single switch rectification circuit, by reverse coupled
Inductance former limit, uncontrollable rectifier bridge, switching tube VT constitute loop, this phase power supply to reverse coupled inductance former limit induction charging,
Electric current rises；Meanwhile reverse coupled inductance secondary inductance passes through the first diode and the second diode respectively to first switch
Electric capacity and second switch electric capacity charge, and first, second switching capacity voltage rises；When switching tube VT turns off, in this phase by
Power supply, reverse coupled inductance former limit inductance, uncontrollable rectifier bridge, diode D7, BOOST booster circuit output capacitance Co are constituted back
Road, now, this phase power supply and reverse coupled inductance former limit inductance charge to BOOST booster circuit output capacitance Co jointly, should
One phase input current reduces；Now, reverse coupled inductance secondary current is reverse, inverse-excitation type voltage-multiplying circuit diode current flow, reversely
Coupling inductance secondary, first, second switching capacity are jointly to the inverse-excitation type voltage-multiplying circuit output of this phase inverse-excitation type voltage-multiplying circuit
Electric capacity charges, and the voltage of inverse-excitation type voltage-multiplying circuit output capacitance raises；By the output capacitance of three-phase flyback voltage-multiplying circuit and
BOOST booster circuit output capacitance Co is connected, and the output voltage of whole triphase single-switch BOOST voltage doubling rectifing circuit is contrary for three
Voltage sum in sharp formula voltage-multiplying circuit output capacitance and BOOST booster circuit output capacitance Co, thus by rectifier output voltage
Improve.
2. small-size wind power-generating as claimed in claim 1 with three-phase flyback multiplication of voltage Single switch rectification circuit it is characterised in that
Described control circuit rectification side adopts pulse frequency to control PFM technology, including multiplier, MPPT controller, voltage controlled oscillator
VCO, trigger and a driving amplifier, its course of work is：Whole first feedback control loop is first to adopt from rectifier bridge outlet side
Sample average anode current and output voltage, obtain power output signal through multiplier, as the input signal of MPPT controller,
Control circuit is simultaneously controlled according to the power signal being inputted, and exports a variable level signal to control voltage controlled oscillator VCO,
VCO exports the sine wave of corresponding frequencies according to the amplitude of input voltage, forms a series of ON time ton not through trigger
Become, the square wave that cycle T changes with sine-wave synchronous, realize PFM control, eventually pass the logical of drive amplification circuit controling switch pipe
Disconnected；The algorithm of MPPT controller adopts disturbance observation method, by relatively carrying out really this power output gathering with comparing of last time
Determine to increase or reduce output voltage to realize MPPT；ΔPo＞ 0, illustrates that power output does not reach maximum, continues to increase
Output voltage is tracked；If Δ Po＜ 0, then situation contrast, until Δ Po=0, now, the output work of wind-driven generator
Rate is in maximum power point.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310487319.7A CN103532409B (en) | 2013-10-17 | 2013-10-17 | Three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation |
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|---|---|---|---|
| CN201310487319.7A CN103532409B (en) | 2013-10-17 | 2013-10-17 | Three-phase flyback voltage-multiplying single-switch rectifying circuit for small-scale wind power generation |
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| CN105244913A (en) * | 2015-11-02 | 2016-01-13 | 国网天津市电力公司 | Small grid-connected wind power generation system and control method thereof |
| CN105680470B (en) * | 2015-11-02 | 2018-02-06 | 国网天津市电力公司 | Adapt to the wind generator system and energy management control method of Miniature wind field characteristic |
| CN107959413A (en) * | 2017-11-22 | 2018-04-24 | 西安电子科技大学 | A kind of low high pressure converted power supply of integrated circuit |
| CN111193428B (en) * | 2020-01-20 | 2022-09-20 | 南京理工大学 | Micro high-frequency grouping pulse power supply |
| CN111654118B (en) * | 2020-03-09 | 2023-06-09 | 西南交通大学 | Dynamic wireless power supply system power fluctuation suppression method based on voltage doubler rectifier |
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