CN108880297A - A kind of phase compensation device and method based on Vienna rectifier - Google Patents
A kind of phase compensation device and method based on Vienna rectifier Download PDFInfo
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- CN108880297A CN108880297A CN201810697120.XA CN201810697120A CN108880297A CN 108880297 A CN108880297 A CN 108880297A CN 201810697120 A CN201810697120 A CN 201810697120A CN 108880297 A CN108880297 A CN 108880297A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention discloses a kind of phase compensation device and method based on Vienna rectifier.The device includes Vienna rectifier, digital processing control module and driving circuit.Method is：Sample AC side three-phase voltage, calculates the penalty coefficient of each phase；Sample AC side three-phase current, calculates three phase compensation signals；DC side capacitance voltage up and down is sampled, mid-point voltage control unit output signal is calculated；Exchange side three-phase current is added with mid-point voltage control unit output signal, three phase compensation signals, obtains modulated signal；DC side capacitance voltage up and down is sampled, the amplitude of carrier signal is calculated, obtains triangle carrier signal；Modulated signal and triangle carrier signal pass through processing and obtain pulse-width signal, driving Vienna rectifier switch pipe work.Hardware cost of the present invention is low, precise control, applied widely, efficiently solves the problems, such as phase shift when input is uneven between Vienna rectifier exchange side voltage and electric current, reduces the total harmonic distortion factor of ac-side current.
Description
Technical field
The invention belongs to Technics of Power Electronic Conversion technical field, especially a kind of phase compensation dress based on Vienna rectifier
It sets and method.
Background technique
Vienna rectifier is a kind of three-level topology, low, the power switch quantity with power switch receiving voltage stress
Less, power density is big, Harmonics of Input content is few, all has good adaptability to various types of PFC control methods
Advantage, therefore be widely used in power factor correction technology research.Meanwhile many documents are single to being based in recent years
The period three-phase PFC rectifier of control conducts in-depth research, and the controller of one circle control does not need multiplier generally, only
Input current need to simply be integrated and plus and minus calculation, and be directly compared with reference signal and be able to achieve permanent modulation frequency
The switch element of rate controls waveform, which has the dual function of modulation and control simultaneously, no matter in stable state or transient state feelings
Under condition, controlled input current average value can be proportional to control reference signal just in switch periods, have dynamic response
Fastly, switching frequency stabilization, strong robustness, the advantages of being easily achieved, therefore control and calculate often as the mainstream of three-phase PFC rectifier
Method.Traditional one circle control is able to achieve input current and the same phase of input voltage in the case where inputting equilibrium condition, but is inputting not
Under conditions of balance, input current and input voltage can be made to generate phase shift using traditional one circle control, be unable to reach specific work
The target of rate factor control.
Three-phase input alternating voltage imbalance will affect rectifier as one of rectifier power supply system phenomenon
The normal work of power supply system, for example, will lead to output DC voltage low frequency pulsating, input power low frequency pulsating, input current
The problems such as distortion.For three-phase input alternating voltage imbalance and phase compensation problem, document 1 (Jin Aijuan, Li
Hangtian,Li Shaolong.An improved control strategy of the one-cycle control
three-phase PFC rectifier under unbalanced conditions[J].Transactions of
China Electrontechnical Society,2006,21(7):115-121.) by introducing asymmetric system number concept pair
Traditional one circle control is improved, and is adjusted by sampled value of the dissymmetry coefficient to each phase input current, thus real
Now each phase current and respective arc in phase, improve input current quality, but the program need to carry out complicated mathematical operation and
It can only use digital control.Document 2 (Wei note of the ancient Chinese aviation intermediate frequency high-power factory rectifier studies [D] Nanjing Aero-Space University,
2014.) inhibit unbalance voltage bring DC side to fluctuate by adding resonant controller after voltage regulator, but input
Phase shift is still had between electric current and input voltage.
Summary of the invention
Simple and reliable, precise control the phase based on Vienna rectifier that the purpose of the present invention is to provide a kind of operations
Compensation device and method realize each phase input voltage and input current zero phase difference when inputting uneven, and realize unity power factor
Operation, reduces the total harmonic distortion factor of ac-side current.
The technical solution for realizing the aim of the invention is as follows：A kind of phase compensation device based on Vienna rectifier, packet
Vienna rectifier, digital processing control module and driving circuit are included, wherein digital processing control module includes sampling unit, two
Orthogonal signal generator unit, DC voltage-stabilizing control unit, mid-point voltage control unit, the carrier wave of rank Generalized Integrator generate single
Member, sinusoidal pulse width modulation unit and penalty coefficient computing unit；
The sampling unit acquires the upper and lower capacitance voltage signal in Vienna rectifier DC side, Vienna rectifier respectively
The three-phase voltage signal of side, the three-phase current signal of Vienna rectifier exchange side are exchanged, and is respectively sent to penalty coefficient meter
Calculate unit, the orthogonal signal generator unit of Second Order Generalized Integrator, mid-point voltage control unit and DC voltage-stabilizing control unit；
The phase of exchange side voltage and electric current is calculated in the exchange side three-phase voltage signal that penalty coefficient computing unit is obtained according to sampling
Move penalty coefficient；The three-phase current signal that the orthogonal signal generator unit of Second Order Generalized Integrator obtains sampling lags 90 °,
And this signal is obtained into three phase compensation signals respectively multiplied by respective phase shift compensation coefficient；Mid-point voltage control unit is according to adopting
The upper and lower capacitance voltage signal of the DC side that sample obtains, obtains the output signal of mid-point voltage control unit, and by the signal with adopt
The exchange side three-phase current that sample obtains is separately summed, while adding three phase compensation signals, obtains modulated signal；DC voltage-stabilizing control
The upper and lower capacitance voltage of DC side that unit is obtained according to sampling, obtains the amplitude of carrier signal, is then forwarded to carrier wave and generates list
Member obtains triangle carrier signal；Modulated signal and triangle carrier signal are sent to sinusoidal pulse width modulation unit, sinusoidal pulsewidth tune
The output end of unit processed accesses each switching tube of every phase bridge arm in Vienna rectifier through overdrive circuit.
Further, the digital processing control module is TMS320F28335 and EPM1270T chip.
A kind of phase compensating method based on Vienna rectifier, this method core governing equation are：
Specifically include following steps：
Step 1, sampling unit Sample AC side three-phase voltage ea、eb、ec, exchange side three-phase current ia、ib、ic, DC side
Upper capacitance voltage UC1, capacitance voltage U under DC sideC2；
Step 2, detection exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude；
Step 3, according to exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude, judge that system is being transported
Whether power grid changes during row, and the angle of phase displacement α being calculated between each phase exchange side voltage and electric current1、α2、α3, root
According to
Penalty coefficient k is found out respectivelya、kb、kc；
Step 4, by sampling three-phase electric current ia、ib、icRespectively multiplied by downsampling factor RsObtain iaRs、ibRs、icRs, it is sent to
The orthogonal signal generator unit of Second Order Generalized Integrator obtains 90 ° of delayed phase of signal, while respectively multiplied by penalty coefficient
ka、kb、kcObtain three phase compensation signal-jkaiaRs、-jkbibRs、-jkcicRs；
Step 4 is sampled obtained i by step 5aRs、ibRs、icRsWith the output u of mid-point voltage control unitfIt is added,
Obtain iaRs+uf、ibRs+uf、icRs+uf；
Step 6, the three phase compensation signal-jk for obtaining step 4aiaRs、-jkbibRs、-jkcicRsIt is obtained with step 5
iaRs+uf、ibRs+uf、icRs+ufIt is separately summed to obtain three-phase modulations signal；
The upper and lower capacitance voltage of sampling is added by step 7, is sent to DC voltage-stabilizing control unit, is obtained triangular carrier width
Then value obtains triangle carrier signal by carrier generation unit；
Step 8 joins the three-phase modulations signal that step 6 obtains and the triangle carrier signal that step 7 obtains, and generates pulsewidth
Modulated signal controls the work of Vienna rectifier switch pipe by driving circuit.
Further, according to exchange side three-phase voltage e described in step 3a、eb、ecZero crossing and ea、eb、ec's
Amplitude, judging system, whether power grid changes in the process of running, specific as follows：
Step 3.1, Sample AC side three-phase power grid voltage, calculate each phase penalty coefficient；
Step 3.2, setting every phase limits of error angleFirst power frequency period measures the zero crossing of each phase voltageEach power frequency period detects the zero crossing of each phase voltage later, if the zero crossing in k-th of period isBy the zero crossing of itself and previous cycleIt is compared, ifWherein x=a, b, c then need to recalculate penalty coefficient ka、kb、kc, go to step 3.1；IfThen kth period and -1 period of kth electric network voltage phase enter step step there is no variation
3.3；
Step 3.3, the every phase limits of error amplitude E of settingerro, the amplitude in network voltage kth period is measured, then will
The amplitude is compared with the amplitude in -1 period of kth, if | Exk-Ex(k-1)|<Eerro, wherein x=a, b, c, then network voltage does not have
It changes, into next power frequency period；Conversely, if | Exk-Ex(k-1)|>Eerro, then network voltage changes, and needs again
Calculate penalty coefficient ka、kb、kc, go to step 3.1.
Further, the angle of phase displacement α between each phase exchange side voltage and electric current is calculated described in step 31、α2、
α3, according to
Penalty coefficient k is found out respectivelya、kb、kc, specific as follows：
In each switch periods, the exchange side three-phase power grid voltage e that is sampled according to sampling unita、eb、ec, according to
The zero-sequence component e of exchange side three-phase power grid voltage is calculated in symmetrical component methodo；
Definition exchange side three-phase power grid voltage ea、eb、ecIt is as follows：
Wherein Ua、Ub、UcThe phase voltage amplitude of a, b, c phase is respectively represented,Respectively represent the phase electricity of a, b, c phase
Press starting phase angle；ω indicates that the fundamental wave angular speed of power grid, t indicate the time；
According to symmetrical component method, the zero-sequence component e of side three-phase power grid voltage is exchangedoFor：
According to ex=exno+eoAnd x=a, b, c, obtain the non-zero-sequence component e of exchange side three-phase power grid voltageano、ebno、ecno
For：
According to the information of exchange side three-phase power grid voltage, the starting phase angle of the non-zero-sequence component of network voltage is obtained
Wherein：
Then basis：
Acquire each phase phase angle shift amount；
Last basis
Each phase penalty coefficient k is acquired respectivelya、kb、kc。
Compared with prior art, the present invention its remarkable advantage is：(1) pass through Sample AC side three-phase voltage and calculate
Each phase phase compensation factor realizes same phase of the input current with input voltage, Vienna when efficiently solving input imbalance
Rectifier exchanges the phase shift problem between side voltage and electric current；(2) exchange side is reduced by introducing mid-point voltage control unit
The total harmonic distortion factor of electric current, improves waveform quality；(3) it is suitable for input balance and inputs unbalanced situation, operation letter
It is single reliable, hardware cost is low, precise control, applied widely.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural schematic diagrams of Vienna rectifier phase compensation device.
Fig. 2 is the structural schematic diagram of the orthogonal signal generator unit of Second Order Generalized Integrator.
Fig. 3 is the topological diagram of Vienna rectifier.
Fig. 4 is penalty coefficient calculation flow chart in the present invention.
Fig. 5 is the waveform diagram of A phase input voltage, input current and modulating wave under traditional one circle control.
Fig. 6 is input unbalance voltage waveform diagram.
Fig. 7 be using the present invention is based on A phase input voltage after the phase compensating method of Vienna rectifier, input current and
The waveform diagram of modulating wave.
Fig. 8 is the comparison diagram that angle of phase displacement size between side A phase voltage and A phase current is exchanged using the method for the present invention front and back,
Wherein (a) is that angle of phase displacement size between side A phase voltage and A phase current is exchanged when inputting uneven using traditional one circle control
Schematic diagram (b) is that phase between side A phase voltage and A phase current is exchanged when inputting uneven after using control method of the invention
Move the big logotype in angle.
Fig. 9 is schemed using the ac-side current harmonic wave profiles versus before and after the method for the present invention, wherein (a) is using the present invention
Control method before ac-side current harmonic wave distribution map, be (b) humorous using the ac-side current after control method of the invention
Wavelength-division Butut.
Specific embodiment
In conjunction with Fig. 1, Fig. 2, Fig. 3, the present invention is based on the phase compensation devices of Vienna rectifier, including Vienna to rectify
Device, digital processing control module and driving circuit, wherein digital processing control module includes sampling unit, Second Order Generalized Integrator
Orthogonal signal generator unit (Second Order Generalized Integrator Quadrature Signal
Generator, SOGI-QSG), DC voltage-stabilizing control unit, mid-point voltage control unit, carrier generation unit, sinusoidal pulsewidth tune
Unit and penalty coefficient computing unit processed；
The orthogonal signal generator unit (SOGI-QSG) of Second Order Generalized Integrator is as shown in Fig. 2, wherein V is input letter
Number, V ' is the signal with V same-phase, and qV ' is the signal for lagging V90 °, and ω is the fundamental wave angular speed of input signal.
The sampling unit acquires the upper and lower capacitance voltage signal in Vienna rectifier DC side, Vienna rectifier respectively
The three-phase voltage signal of side, the three-phase current signal of Vienna rectifier exchange side are exchanged, and is respectively sent to penalty coefficient meter
Calculate unit, the orthogonal signal generator unit of Second Order Generalized Integrator, mid-point voltage control unit and DC voltage-stabilizing control unit；
The phase of exchange side voltage and electric current is calculated in the exchange side three-phase voltage signal that penalty coefficient computing unit is obtained according to sampling
Move penalty coefficient；The three-phase current signal that the orthogonal signal generator unit of Second Order Generalized Integrator obtains sampling lags 90 °,
And this signal is obtained into three phase compensation signals respectively multiplied by respective phase shift compensation coefficient；Mid-point voltage control unit is according to adopting
The upper and lower capacitance voltage signal of the DC side that sample obtains, obtains the output signal of mid-point voltage control unit, and by the signal with adopt
The exchange side three-phase current that sample obtains is separately summed, while adding three phase compensation signals, obtains modulated signal；DC voltage-stabilizing control
The upper and lower capacitance voltage of DC side that unit is obtained according to sampling, obtains the amplitude of carrier signal, is then forwarded to carrier wave and generates list
Member obtains triangle carrier signal；Modulated signal and triangle carrier signal are sent to sinusoidal pulse width modulation unit, sinusoidal pulsewidth tune
The output end of unit processed accesses each switching tube of every phase bridge arm in Vienna rectifier through overdrive circuit.
As a kind of specific example, the digital processing control module is TMS320F28335 and EPM1270T chip.
The present invention is based on the phase compensating methods of Vienna rectifier, specifically include following steps：
Step 1, in each switch periods, the sampling unit of digital processing control module distinguishes Sample AC side three-phase electricity
Press ea、eb、ec, exchange side three-phase current ia、ib、ic, capacitance voltage U on DC sideC1, capacitance voltage U under DC sideC2；
Step 2, detection exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude；
Step 3, according to exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude, judge that system is being transported
Whether power grid changes during row, and the angle of phase displacement α being calculated between each phase exchange side voltage and electric current1、α2、α3, and
According to
Penalty coefficient k is found out respectivelya、kb、kc, specific as follows：
Step 3.1, the operating status for first determining power grid first, calculate penalty coefficient according to the specific operating status of power grid
ka、kb、kc, in conjunction with Fig. 4, specific step is as follows：
Step 3.1.1, Sample AC side three-phase power grid voltage calculates each phase penalty coefficient；
Step 3.1.2, every phase limits of error angle is setFirst power frequency period measures the zero passage of each phase voltage
PointEach power frequency period detects the zero crossing of each phase voltage later, if the zero crossing in k-th of period isBy the zero crossing of itself and previous cycleIt is compared, ifWherein x=a, b, c need to recalculate penalty coefficient ka、kb、kc, go to step 3.1.1；IfThen kth period and -1 period of kth electric network voltage phase enter step 1.3 there is no variation；
Step 3.1.3, every phase limits of error amplitude E is seterro, the amplitude in network voltage kth period is measured, then
The amplitude is compared with the amplitude in -1 period of kth, if | Exk-Ex(k-1)|<Eerro, (wherein x=a, b, c), then network voltage
There is no variations, into next power frequency period；Conversely, if | Exk-Ex(k-1)|>Eerro, then network voltage changes, and needs
Recalculate penalty coefficient ka、kb、kc, go to step 3.1.1.
Step 3.2, in each switch periods, the exchange side three-phase power grid voltage e that is sampled according to sampling unita、
eb、ec, and according to symmetrical component method, the zero-sequence component e of exchange side three-phase power grid voltage is calculatedo；
Definition exchange side three-phase power grid voltage ea、eb、ecIt is as follows：
Wherein Ua、Ub、UcThe phase voltage amplitude of a, b, c phase is respectively represented,Respectively represent the phase electricity of a, b, c phase
Press starting phase angle；
According to symmetrical component method, the zero-sequence component for exchanging side three-phase power grid voltage is：
According to ex=exno+eo(x=a, b, c) obtain exchange side three-phase power grid voltage non-zero-sequence component be：
According to the starting phase angle of the non-zero-sequence component of the available network voltage of information of exchange side three-phase power grid voltage：
Wherein：
Then basis：Each phase phase angle shift amount is acquired, finally according to ka=tan (α1)、kb=tan (α2)、
kc=tan (α3) each phase penalty coefficient k is acquired respectivelya、kb、kc。
Step 4, by sampling three-phase electric current ia、ib、icRespectively multiplied by downsampling factor RsObtain iaRs、ibRs、icRs, it is sent to
The orthogonal signal generator unit of Second Order Generalized Integrator obtains 90 ° of delayed phase of signal, while respectively multiplied by penalty coefficient
ka、kb、kcObtain three phase compensation signal-jkaiaRs、-jkbibRs、-jkcicRs；
Step 4 is sampled obtained i by step 5aRs、ibRs、icRsWith the output u of mid-point voltage control unitfIt is added,
Obtain iaRs+uf、ibRs+uf、icRs+uf；
Step 6, the three phase compensation signal-jk for obtaining step 4aiaRs、-jkbibRs、-jkcicRsIt is obtained with step 5
iaRs+uf、ibRs+uf、icRs+ufIt is separately summed to obtain three-phase modulations signal；
Upper and lower two capacitance voltage of sampling is added by step 7, is sent to DC voltage-stabilizing control unit, is obtained triangular carrier
Then amplitude obtains triangle carrier signal by carrier generation unit；
Step 8 joins the three-phase modulations signal that step 6 obtains and the triangle carrier signal that step 7 obtains, and generates pulsewidth
Modulated signal controls the work of Vienna rectifier switch pipe by driving circuit.
The core governing equation of modified one-cycle control is as follows at this time：
The modulating rule of Vienna rectifier is：As shown in figure 5, in the positive half cycle of modulating wave, working as carrier wave by taking A phase as an example
When greater than modulating wave, S is enableda1、Sa2Conducting, A phase bridge arm voltage are 0, when carrier wave is less than modulating wave, enable Sa1、Sa2Shutdown, A phase bridge
Arm voltage is VDC/2；S is enabled when carrier wave is less than modulating wave in the negative half period of modulating wavea1、Sa2Conducting, A phase bridge arm voltage are 0,
When carrier wave is greater than modulating wave, S is enableda1、Sa2Shutdown, A phase bridge arm voltage are-VDC/2.B, the modulation strategy of C two-phase and A phase phase
Together.
Wherein VDCFor Vienna rectifier outlet side DC bus-bar voltage.
Embodiment 1
The present embodiment has built three-phase Vienna rectification circuit, input voltage warp using the Simulink tool in MATLAB
Direct current is obtained after three-phase Vienna rectifier circuit rectifies.Electric parameter setting such as table 1 in simulation process：
Table 1
Table 1 is Simulink simulation parameter, in order to keep input voltage uneven, then reduces input voltage B phase amplitude
30 ° of 20%, C phase delayed phase, Fig. 6 are input unbalance voltage waveform diagrams, and input voltage B phase amplitude reduces 20%, C phase phase
30 ° of lag, Fig. 5 are the waveform diagrams of A phase input voltage, input current and modulating wave under traditional one circle control, and Fig. 7 is that this is added
The waveform diagram of A phase input voltage, input current and modulating wave after the control method of invention.
Fig. 8 is to use phase shift between exchange side voltage and electric current before and after control method of the invention under above-mentioned electric parameter
Angle schematic diagram, wherein (a) figure is using the waveform diagram under traditional one circle control, angle of phase displacement at this time is 14.1 °, and (b) figure is
Using the voltage and current waveform after control method of the invention, angle of phase displacement at this time is 4.4 °.(a), (b) in Fig. 9 are respectively
It is using current on line side total harmonic distortion factor before compensating control method of the invention and later, wherein (a) is to use this hair
Ac-side current harmonic wave distribution map before bright control method is (b) using the ac-side current after control method of the invention
Harmonic wave distribution map, it can be seen that the total harmonic distortion factor of ac-side current can be effectively reduced in the control method in the present invention.
Table 2
It can be seen that the present invention can effectively solve Vienna rectifier under unbalanced power grid and exchange from table 2 and Fig. 8, Fig. 9
Phase shift problem between side voltage and electric current, and reduce the total harmonic distortion factor of ac-side current.
In conclusion passing through sampling three-phase network voltage, meter the present invention is based on the phase compensating method of Vienna rectifier
Voltage current phase deviation angle is calculated, to calculate each phase phase compensation factor；And it is with the exchange side three-phase current of sampling
Basis signal, by 90 ° of basis signal lag and respectively multiplied by respective penalty coefficient, to obtain three phase compensation signals；
The exchange side three-phase current of sampling is added with the output of mid-point voltage control unit respectively, then adds three phase compensation signals,
Obtain modulated signal；DC side two capacitance voltages up and down are sampled, and pass through DC voltage-stabilizing control unit, obtain the width of carrier signal
Then value passes through carrier generation unit, obtains triangle carrier signal；Modulated signal and triangle carrier signal are by sinusoidal pulsewidth tune
Cell processing processed obtains pulse-width signal, and then drives the work of Vienna rectifier switch pipe, to realize exchange side voltage
Current phase compensate is effectively reduced the harmonic wave of electric current, improves waveform quality, is advantageously implemented the list of three-phase Vienna rectifier
Position Power operation provides certain theoretical basis for fields such as active power factor correction, and has great engineer application valence
Value.
Claims (5)
1. a kind of phase compensation device based on Vienna rectifier, which is characterized in that including Vienna rectifier, digital processing
Control module and driving circuit, wherein digital processing control module includes the orthogonal signalling of sampling unit, Second Order Generalized Integrator
Generator unit, DC voltage-stabilizing control unit, mid-point voltage control unit, carrier generation unit, sinusoidal pulse width modulation unit and
Penalty coefficient computing unit；
The sampling unit acquires the upper and lower capacitance voltage signal in Vienna rectifier DC side, the exchange of Vienna rectifier respectively
Three-phase voltage signal, the Vienna rectifier of side exchange the three-phase current signal of side, and are respectively sent to penalty coefficient and calculate list
Member, the orthogonal signal generator unit of Second Order Generalized Integrator, mid-point voltage control unit and DC voltage-stabilizing control unit；Compensation
The exchange side three-phase voltage signal that coefficient calculation unit is obtained according to sampling, the phase shift that exchange side voltage and electric current is calculated are mended
Repay coefficient；The three-phase current signal that the orthogonal signal generator unit of Second Order Generalized Integrator obtains sampling lags 90o, and will
This signal multiplied by respective phase shift compensation coefficient, obtains three phase compensation signals respectively；Mid-point voltage control unit is according to sampling
The upper and lower capacitance voltage signal of the DC side arrived obtains the output signal of mid-point voltage control unit, and by the signal and samples
To exchange side three-phase current be separately summed, while add three phase compensation signals, obtain modulated signal；DC voltage-stabilizing control unit
According to the upper and lower capacitance voltage of DC side that sampling obtains, the amplitude of carrier signal is obtained, carrier generation unit is then forwarded to,
Obtain triangle carrier signal；Modulated signal and triangle carrier signal are sent to sinusoidal pulse width modulation unit, sinusoidal pulse width modulation
The output end of unit accesses each switching tube of every phase bridge arm in Vienna rectifier through overdrive circuit.
2. the phase compensation device according to claim 1 based on Vienna rectifier, which is characterized in that at the number
Reason control module is TMS320F28335 and EPM1270T chip.
3. a kind of phase compensating method based on Vienna rectifier, which is characterized in that this method core governing equation is：
Specifically include following steps：
Step 1, sampling unit Sample AC side three-phase voltage ea、eb、ec, exchange side three-phase current ia、ib、ic, DC side powers on
Hold voltage UC1, capacitance voltage U under DC sideC2；
Step 2, detection exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude；
Step 3, according to exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude, judge that system was being run
Whether power grid changes in journey, and the angle of phase displacement α being calculated between each phase exchange side voltage and electric current1、α2、α3, according to
Penalty coefficient k is found out respectivelya、kb、kc；
Step 4, by sampling three-phase electric current ia、ib、icRespectively multiplied by downsampling factor RsObtain iaRs、ibRs、icRs, it is wide to be sent to second order
The orthogonal signal generator unit of adopted integrator obtains 90 ° of delayed phase of signal, while respectively multiplied by penalty coefficient ka、kb、
kcObtain three phase compensation signal-jkaiaRs、-jkbibRs、-jkcicRs；
Step 4 is sampled obtained i by step 5aRs、ibRs、icRsWith the output u of mid-point voltage control unitfIt is added by
iaRs+uf、ibRs+uf、icRs+uf；
Step 6, the three phase compensation signal-jk for obtaining step 4aiaRs、-jkbibRs、-jkcicRsThe i obtained with step 5aRs+
uf、ibRs+uf、icRs+ufIt is separately summed to obtain three-phase modulations signal；
The upper and lower capacitance voltage of sampling is added by step 7, is sent to DC voltage-stabilizing control unit, is obtained triangular carrier amplitude,
Then triangle carrier signal is obtained by carrier generation unit；
Step 8 joins the three-phase modulations signal that step 6 obtains and the triangle carrier signal that step 7 obtains, and generates pulsewidth modulation
Signal controls the work of Vienna rectifier switch pipe by driving circuit.
4. the phase compensating method according to claim 3 based on Vienna rectifier, which is characterized in that institute in step 3
State according to exchange side three-phase voltage ea、eb、ecZero crossing and ea、eb、ecAmplitude, judge that system is electric in the process of running
Whether net changes, specific as follows：
Step 3.1, Sample AC side three-phase power grid voltage, calculate each phase penalty coefficient；
Step 3.2, setting every phase limits of error angleFirst power frequency period measures the zero crossing of each phase voltageEach power frequency period detects the zero crossing of each phase voltage later, if the zero crossing in k-th of period isBy the zero crossing of itself and previous cycleIt is compared, ifWherein x=a, b, c then need to recalculate penalty coefficient ka、kb、kc, go to step 3.1；IfThen kth period and -1 period of kth electric network voltage phase enter step step there is no variation
3.3；
Step 3.3, the every phase limits of error amplitude E of settingerro, the amplitude in network voltage kth period is measured, then by the width
Value is compared with the amplitude in -1 period of kth, if | Exk-Ex(k-1)|<Eerro, wherein x=a, b, c, then network voltage there is no
Variation, into next power frequency period；Conversely, if | Exk-Ex(k-1)|>Eerro, then network voltage changes, and need to recalculate
Penalty coefficient ka、kb、kc, go to step 3.1.
5. the phase compensating method according to claim 3 based on Vienna rectifier, which is characterized in that institute in step 3
The angle of phase displacement α being calculated between each phase exchange side voltage and electric current stated1、α2、α3, according to
Penalty coefficient k is found out respectivelya、kb、kc, specific as follows：
In each switch periods, the exchange side three-phase power grid voltage e that is sampled according to sampling unita、eb、ec, according to symmetrical
The zero-sequence component e of exchange side three-phase power grid voltage is calculated in component methodo；
Definition exchange side three-phase power grid voltage ea、eb、ecIt is as follows：
Wherein Ua、Ub、UcThe phase voltage amplitude of a, b, c phase is respectively represented,At the beginning of the phase voltage for respectively representing a, b, c phase
Beginning phase angle；ω indicates that the fundamental wave angular speed of power grid, t indicate the time；
According to symmetrical component method, the zero-sequence component e of side three-phase power grid voltage is exchangedoFor：
According to ex=exno+eoAnd x=a, b, c, obtain the non-zero-sequence component e of exchange side three-phase power grid voltageano、ebno、ecnoFor：
According to the information of exchange side three-phase power grid voltage, the starting phase angle of the non-zero-sequence component of network voltage is obtained
Wherein：
Then basis：
Acquire each phase phase angle shift amount；
Last basis
Each phase penalty coefficient k is acquired respectivelya、kb、kc。
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380633A (en) * | 2019-07-31 | 2019-10-25 | 太原理工大学 | A kind of electric current modification method being directed under non-ideal power grid based on one circle control |
| CN110581663A (en) * | 2019-10-16 | 2019-12-17 | 南京理工大学 | Phase compensation device and method of Vienna rectifier under low carrier ratio |
| CN111952975A (en) * | 2020-07-24 | 2020-11-17 | 易事特集团股份有限公司 | Power grid zero-crossing compensation method |
| CN112448604A (en) * | 2020-12-14 | 2021-03-05 | 上海空间电源研究所 | Rectifier control circuit |
| CN112953270A (en) * | 2021-02-07 | 2021-06-11 | 石家庄通合电子科技股份有限公司 | Three-phase three-level rectifier neutral point balance control method and device and terminal equipment |
| CN115242071A (en) * | 2022-08-16 | 2022-10-25 | 南京航空航天大学 | Control method of Vienna rectifier under power grid phase failure |
| CN114397496B (en) * | 2022-01-21 | 2024-07-23 | 国网黑龙江省电力有限公司供电服务中心 | Phase measurement method, system and medium applied to standard meter voltage and current |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836464A (en) * | 2015-05-26 | 2015-08-12 | 东南大学 | Neutral-point-potential balance control device and method for direct current side of VIENNA rectifier |
| CN107070193A (en) * | 2016-12-09 | 2017-08-18 | 南京理工大学 | A kind of method for being used to optimize Vienna rectifier input currents |
| CN107834883A (en) * | 2017-10-27 | 2018-03-23 | 南京理工大学 | A kind of mid-point voltage control device and method based on modulating wave interval division |
| CN108011535A (en) * | 2017-12-18 | 2018-05-08 | 中国矿业大学(北京) | Unidirectional three-phase rectifier current over-zero distortions correction strategy based on one circle control |
-
2018
- 2018-06-29 CN CN201810697120.XA patent/CN108880297B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836464A (en) * | 2015-05-26 | 2015-08-12 | 东南大学 | Neutral-point-potential balance control device and method for direct current side of VIENNA rectifier |
| CN107070193A (en) * | 2016-12-09 | 2017-08-18 | 南京理工大学 | A kind of method for being used to optimize Vienna rectifier input currents |
| CN107834883A (en) * | 2017-10-27 | 2018-03-23 | 南京理工大学 | A kind of mid-point voltage control device and method based on modulating wave interval division |
| CN108011535A (en) * | 2017-12-18 | 2018-05-08 | 中国矿业大学(北京) | Unidirectional three-phase rectifier current over-zero distortions correction strategy based on one circle control |
Non-Patent Citations (2)
| Title |
|---|
| 韦徵 等: "基于单周期控制的三相PFC整流器输入电流相位滞后及闭环补偿", 《中国电机工程学报》 * |
| 韦徵 等: "输入电压不平衡时三相PFC整流器改进单周期控制策略研究", 《电工技术学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380633A (en) * | 2019-07-31 | 2019-10-25 | 太原理工大学 | A kind of electric current modification method being directed under non-ideal power grid based on one circle control |
| CN110581663A (en) * | 2019-10-16 | 2019-12-17 | 南京理工大学 | Phase compensation device and method of Vienna rectifier under low carrier ratio |
| CN110581663B (en) * | 2019-10-16 | 2022-04-01 | 南京理工大学 | Phase compensation device and method of Vienna rectifier under low carrier ratio |
| CN111952975A (en) * | 2020-07-24 | 2020-11-17 | 易事特集团股份有限公司 | Power grid zero-crossing compensation method |
| CN111952975B (en) * | 2020-07-24 | 2022-05-03 | 易事特集团股份有限公司 | Power grid zero-crossing compensation method |
| CN112448604A (en) * | 2020-12-14 | 2021-03-05 | 上海空间电源研究所 | Rectifier control circuit |
| CN112953270A (en) * | 2021-02-07 | 2021-06-11 | 石家庄通合电子科技股份有限公司 | Three-phase three-level rectifier neutral point balance control method and device and terminal equipment |
| CN114397496B (en) * | 2022-01-21 | 2024-07-23 | 国网黑龙江省电力有限公司供电服务中心 | Phase measurement method, system and medium applied to standard meter voltage and current |
| CN115242071A (en) * | 2022-08-16 | 2022-10-25 | 南京航空航天大学 | Control method of Vienna rectifier under power grid phase failure |
| CN115242071B (en) * | 2022-08-16 | 2024-05-14 | 南京航空航天大学 | Control method of Vienna rectifier under power grid open-phase condition |
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