CN107070193A - A kind of method for being used to optimize Vienna rectifier input currents - Google Patents
A kind of method for being used to optimize Vienna rectifier input currents Download PDFInfo
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- CN107070193A CN107070193A CN201611128725.4A CN201611128725A CN107070193A CN 107070193 A CN107070193 A CN 107070193A CN 201611128725 A CN201611128725 A CN 201611128725A CN 107070193 A CN107070193 A CN 107070193A
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
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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
- H02M7/219—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 in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of method for being used to optimize Vienna rectifier input currents, belong to high power factor converting device field.Comprise the following steps：Three-phase reference voltage is set up using switching frequency optimization PWM method, basic modulating wave is generated；Calculate because of the voltage phase angle that wave filter exists and produces, determine compensation range；By increasing offset voltage in three-phase reference voltage, new modulating wave is generated, hands over and cuts with amplitude up and down and phase identical triangular wave dual carrier, finally give the PWM ripples of control Vienna rectifiers.The inventive method can reduce current distortion caused by LCL filter device so that input current tracks input voltage, improve power factor, improve the efficiency of Vienna rectifiers.
Description
Technical field
It is particularly a kind of defeated for optimizing Vienna rectifiers the present invention relates to high power factor converting engineering device technique field
Enter the method for electric current.
Background technology
With continuing to develop for industrial technology, the extensive use of Technics of Power Electronic Conversion device is brought greatly to transformation of electrical energy
Convenience, while the power electronic devices on converting means also generates serious harmonic wave and idle pollution to power system,
Reduce the net side quality of power supply.Wherein fairing is essential.Therefore, in power electronics research field of today, PWM is whole
Stream device should meet with High Power Factor and low Harmonics of Input aberration rate (total harmonic distortion,
THD) the characteristics of, this is also a current study hotspot.
VIENNA rectifier is to teach the three-level PWM rectifier topology proposed in 1994 by Kolar, with other
Type of converter compares the characteristics of having efficiency high.The topological structure is simple, and switching device is few；Each power device is born most
Big voltage is the half of output voltage；Without output voltage bridge arm direct pass without setting switching dead and input can be realized
The advantages of unity power factor correction, obtain the extensive concern of various countries researcher.
At present, wave filter is applied in Vienna rectifiers on a large scale.LCL filter is a kind of more common
Wave filter, can effectively reduce the higher hamonic wave in input current, rectifier is realized that unity power factor is run.Compared to L
Mode filter, can meet the requirement for filtering out same harmonic content, so as to reduce the body of wave filter with less inductance value
Accumulate, improve power density, reduce cost.But it is due to the presence of the inductive drop and resistive component in wave filter so that power network
There is certain phase difference and difference in magnitude in side electric current and rectifier three-phase reference voltage, so as to cause input current abnormality.
The content of the invention
It is an object of the invention to provide one kind can efficiently reduce current distortion caused by LCL filter device so as to
Improve the method for being used to optimize Vienna rectifier input currents of power factor.
The technical solution for realizing the object of the invention is：A kind of side for being used to optimize Vienna rectifier input currents
Method, comprises the following steps：
Step 1, three-phase reference voltage is set up using switching frequency optimization PWM method, generates basic modulating wave；
Step 2, calculate because of the voltage phase angle that wave filter exists and produces, determine compensation range；
Step 3, by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, with amplitude up and down and phase
Identical triangular wave dual carrier, which is handed over, cuts, and finally gives the PWM ripples of control Vienna rectifiers.
Further, three-phase reference voltage is set up using threephase switch frequency optimization PWM method described in step 1, generates base
This modulating wave, comprises the following steps：
(1) each moment calculates a, b, c three-phase reference voltage Uaref、Ubref、UcrefIn maximum and minimum value,
And the average value of the maximum and minimum value is sought, it is used as a bias Uoffset；
(2) the former each phase of three-phase reference voltage subtracts this bias Uoffset, it is used as basic modulating wave.
Further, calculated described in step 2 because of the voltage phase angle that wave filter exists and produces, determine compensation range, had
Body is as follows：
Because wave filter exists and the voltage phase angle that produces, be due to depositing for inductive drop in wave filter and resistive component
So that there is phase difference and difference in magnitude with rectifier three-phase reference voltage in grid side electric current；
Calculate because behind the phase angle that wave filter exists and produces, by judgement during modulating wave zero crossing, it is determined that increase
The scope of offset voltage.
Further, new modulating wave is generated by increasing offset voltage in three-phase reference voltage described in step 3, it is and upper
Lower amplitude and phase identical triangular wave dual carrier, which is handed over, cuts, wherein：
The purpose of the offset voltage is so that modulating wave during zero crossing is 0 needing the value in compensation range, so as to obtain
The new modulating wave of current distortion can be reduced by obtaining；
Amplitude and the phase identical triangular wave dual carrier up and down, refer to be respectively at the positive and negative semiaxis of reference axis, with zero
Axle is the amplitude and two triangular carriers of phase identical of reference axis.
Further, the PWM ripples of Vienna rectifiers are controlled described in step 3, are specially：
By increasing offset voltage in three-phase reference voltage, new modulating wave, positive axis and the new modulation of negative semiaxis are generated
Ripple carries out friendship from different triangular waves respectively and intercepts PWM ripples, and the two-way PWM ripples in every phase control six switching tube Vienna respectively
Two-way PWM ripples phase on two switching tubes on the same bridge arm of rectifier, or every phase with controlling three switching tube Vienna afterwards
Switching tube on each phase bridge arm of rectifier.
Compared with prior art, its remarkable advantage is the present invention：When (1) can efficiently reduce input current zero crossing
Distortion so that input current tracks input voltage, so as to improve power factor, meets power network and electrical equipment to harmonic standard
It is strict with；(2) generation of modulating wave is compensated on the basis of switching frequency optimization PWM (SFOPWM) method, because
And can effectively reduce switching frequency, increase modulation range；(3) carrier wave is amplitude up and down and the double loads of phase identical triangular wave
Ripple, the PWM ripples of generation can both control two switching tubes on the six same bridge arms of switching tube Vienna rectifiers respectively, can also
Per phase two-way pwm signal phase with controlling the switching tube on three each phase bridge arms of switching tube Vienna rectifiers afterwards；(4) flexibility
Preferably, for different LCL filters, the compensation in different range can be carried out, is easily realized.
Brief description of the drawings
Fig. 1 is the topology diagram of three-phase tri-level Vienna rectifiers in the present invention.
Fig. 2 is the overall control structure figure under Vienna rectifier dq rotating coordinate systems in the present invention.
Fig. 3 is the cut-away view of LCL filter in the present invention.
Fig. 4 is the phase difference schematic diagram of input current and reference voltage in the present invention.
Fig. 5 is voltage x current decomposing schematic representation on single phase filter in the present invention.
Fig. 6 is voltage x current resolution of vectors figure on single phase filter in the present invention.
Fig. 7 is basic modulating wave and compensatory zone schematic diagram in the present invention.
Fig. 8 is a phase modulating wave and a triangular wave dual carrier friendship section schematic diagram in the present invention.
Fig. 9 is the three-phase modulations ripple figure after compensating in the present invention.
Embodiment
The present invention is used for the method for optimizing Vienna rectifier input currents, comprises the following steps：
Step 1, three-phase reference voltage is set up using switching frequency optimization PWM method, generates basic modulating wave, including it is following
Step：
(1) each moment calculates a, b, c three-phase reference voltage Uaref、Ubref、UcrefIn maximum and minimum value,
And the average value of the maximum and minimum value is sought, it is used as a bias Uoffset；
(2) the former each phase of three-phase reference voltage subtracts this bias Uoffset, it is used as basic modulating wave.
Step 2, calculate because of the voltage phase angle that wave filter exists and produces, determine compensation range, it is specific as follows：
Because wave filter exists and the voltage phase angle that produces, be due to depositing for inductive drop in wave filter and resistive component
So that there is phase difference and difference in magnitude with rectifier three-phase reference voltage in grid side electric current；
Calculate because behind the phase angle that wave filter exists and produces, by judgement during modulating wave zero crossing, it is determined that increase
The scope of offset voltage.
Step 3, by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, with amplitude up and down and phase
Identical triangular wave dual carrier, which is handed over, cuts, and finally gives the PWM ripples of control Vienna rectifiers.
It is described by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, with amplitude up and down and phase phase
Same triangular wave dual carrier, which is handed over, cuts, wherein：
The purpose of the offset voltage is so that modulating wave during zero crossing is 0 needing the value in compensation range, so as to obtain
The new modulating wave of current distortion can be reduced by obtaining；
Amplitude and the phase identical triangular wave dual carrier up and down, refer to be respectively at the positive and negative semiaxis of reference axis, with zero
Axle is the amplitude and two triangular carriers of phase identical of reference axis.
The PWM ripples of the control Vienna rectifiers, be specially：
By increasing offset voltage in three-phase reference voltage, new modulating wave, positive axis and the new modulation of negative semiaxis are generated
Ripple carries out friendship from different triangular waves respectively and intercepts PWM ripples, and the two-way PWM ripples in every phase control six switching tube Vienna respectively
Two-way PWM ripples phase on two switching tubes on the same bridge arm of rectifier, or every phase with controlling three switching tube Vienna afterwards
Switching tube on each phase bridge arm of rectifier.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1
As shown in figure 1, Fig. 1 is the topology diagram of three-phase tri-level Vienna rectifiers, wherein net side employs LCL filters
Ripple device.
As shown in Fig. 2 Fig. 2 is the overall control structure figure under Vienna rectifier dq rotating coordinate systems.Output voltage is given
Determine Udc *With the DC side output voltage difference U measureddcThe given i of active component q axles is used as after PI is adjustedq *, then with input
The q axis components i of electric currentqBy pi regulator q axis components U as the reference voltageqref；The given i of reactive component d axlesd *(typically take
Be worth for 0) with d axis components idBy pi regulator d axis components U as the reference voltagedref, then changed by dq/abc coordinate systems
To three-phase reference voltage Uaref、Ubref、Ucref.Three-phase reference voltage is along with the offset voltage that LCL filter is directed in the present invention
Design, and other neutral voltage balancing control section, generate the PWM ripples of controlling switch pipe break-make.
The present invention is used for the method for optimizing Vienna rectifier input currents, specifically includes following steps：
Step 1, three-phase reference voltage is set up using switching frequency optimization PWM (SFOPWM) method, generates basic modulating wave,
Specifically include following steps：
Three-phase reference voltage U is converted to by dq/abc coordinate systemsaref、Ubref、UcrefAfterwards,
(1) each moment calculates a, b, c three-phase reference voltage Uaref、Ubref、UcrefIn maximum and minimum value,
And the average value of the maximum and minimum value is sought, it is used as a bias Uoffset(as shown in Equation 1)；
(2) the former each phase of three-phase reference voltage subtracts this bias Uoffset, as basic modulating wave (such as the institute of formula 2
Show).
Step 2, calculate wave filter and there is the voltage phase angle produced, determine compensation range；
As shown in figure 3, also there is resistive component in practical filter, input current is flowed into after wave filter, in inductive component
And have larger pressure drop on resistive component, and after the part shunting of electric capacity, while also there is certain phase
Difference so that reference voltage has certain phase difference with voltage on line side, as shown in Figure 4.The phase difference produced by wave filter is deposited all the time
, and this value can increase with the increase of inductance value and the increase of input current.Due to input in this section of region
The tracing property of current vs voltage can not be met, so that electric current produces distortion.
A wherein phase can be observed by calculating wave filter phase angle, as shown in figure 5, input current is consistent with input voltage phase,
Flow through after net side inductive resistance component, phase angle θ occur1, voltage is Uc∠θ1, after two branch road shuntings, flow through rectifier
The current value of the inductive resistance component of side is Ir∠θr, the reference voltage finally obtained is Uref∠θZ.Specific voltage x current vector
Decompose as shown in fig. 6, wherein θZ=θ1+θ2。
θZCalculation formula it is as follows：
U is calculated firstc∠θ1, the π f of wherein ω=2s。 (3)
Uc∠θ1=(Ug-RgIg)-jωLgIg=M+jN, M=Ug-RgIg, N=- ω LgIg (5)
Again U is obtained with same methodref∠θZ, calculation formula is as follows：
Ir∠θr=Ig∠0-Ic∠θc (7)
Ic∠θc=j ω CUc∠θ1 (8)
Formula (7) and formula (8) are substituted into formula (6), equation below is obtained：
The voltage phase difference that device after filtering can finally be obtained is expressed as below：
Wherein Ug、IgRespectively phase voltage, the virtual value of phase current；Rg、RrRespectively the resistance of net side and rectifier side divides
Amount；Lg、LrThe respectively inductive component of net side and rectifier side；C is filter capacity capacitance, and ω is line voltage angular frequency.
Draw θZAfterwards, it is thus necessary to determine that compensation range, drawn by Fig. 4, the scope at reference voltage zero crossing, because
This compensation range is as shown in Fig. 7 dash areas.
Step 3, by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, with amplitude up and down and phase
Identical triangular wave dual carrier, which is handed over, cuts, and finally gives the PWM ripples of control Vienna rectifiers.
The purpose of wherein offset voltage is so that modulating wave during zero crossing is 0 needing the value in compensation range, so as to obtain
The new optimization modulating wave of current distortion can be reduced by obtaining, and the offset of specific modulating wave is as shown in table 1：
The offset voltage allocation table of table 1
According to formula (14), new optimization modulating wave is calculated.
With reference to Fig. 8, amplitude and phase identical triangular wave dual carrier refer to be respectively at the positive and negative semiaxis of reference axis up and down, with
Zero axle is the amplitude and two triangular carriers of phase identical of reference axis.New optimization modulating wave, its positive axis and negative semiaxis
New modulating wave carries out friendship from different triangular waves respectively and intercepts PWM ripples, and the two-way PWM ripples in every phase control six switching tubes respectively
Two-way PWM ripples phase on two switching tubes on the same bridge arm of Vienna rectifiers, or every phase with controlling three switching tubes afterwards
Switching tube on each phase bridge arm of Vienna rectifiers.Three-phase optimization modulating wave is as shown in Figure 9.
In summary, the inventive method is directed to different LCL filters, can carry out the compensation in different range, flexibly
Property preferably, it is easy to realize.Distortion during input current zero crossing can be efficiently reduced so that input current tracking input electricity
Pressure, so as to improve power factor, meets the strict demand of power network and electrical equipment to harmonic standard.
Claims (5)
1. a kind of method for being used to optimize Vienna rectifier input currents, it is characterised in that comprise the following steps：
Step 1, three-phase reference voltage is set up using switching frequency optimization PWM method, generates basic modulating wave；
Step 2, calculate because of the voltage phase angle that wave filter exists and produces, determine compensation range；
Step 3, by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, it is identical with amplitude up and down and phase
Triangular wave dual carrier hand over cut, finally give control Vienna rectifiers PWM ripples.
2. the method according to claim 1 for being used to optimize Vienna rectifier input currents, it is characterised in that step 1
The use threephase switch frequency optimization PWM method sets up three-phase reference voltage, generates basic modulating wave, comprises the following steps：
(1) each moment calculates a, b, c three-phase reference voltage Uaref、Ubref、UcrefIn maximum and minimum value, and ask
The average value of the maximum and minimum value, is used as a bias Uoffset；
(2) the former each phase of three-phase reference voltage subtracts this bias Uoffset, it is used as basic modulating wave.
3. the method according to claim 1 for being used to optimize Vienna rectifier input currents, it is characterised in that step 2
It is described to calculate because of the voltage phase angle that wave filter exists and produces, compensation range is determined, it is specific as follows：
Because wave filter exists and the voltage phase angle that produces, be due to the presence of the inductive drop and resistive component in wave filter,
So that there is phase difference and difference in magnitude with rectifier three-phase reference voltage in grid side electric current；
Calculate because behind the phase angle that wave filter exists and produces, by judgement during modulating wave zero crossing, it is determined that increase compensation
The scope of voltage.
4. the method according to claim 1 for being used to optimize Vienna rectifier input currents, it is characterised in that step 3
It is described by increasing offset voltage in three-phase reference voltage, new modulating wave is generated, with amplitude up and down and phase identical triangle
Ripple dual carrier, which is handed over, cuts, wherein：
The purpose of the offset voltage is so that modulating wave during zero crossing is 0 needing the value in compensation range, so as to obtain energy
Enough reduce the new modulating wave of current distortion；
It is described up and down amplitude and phase identical triangular wave dual carrier, refer to be respectively at the positive and negative semiaxis of reference axis, using zero axle as
The amplitude of reference axis and two triangular carriers of phase identical.
5. the method according to claim 1 for being used to optimize Vienna rectifier input currents, it is characterised in that step 3
The PWM ripples of the control Vienna rectifiers, be specially：
By increasing offset voltage in three-phase reference voltage, new modulating wave, positive axis and the new modulation wavelength-division of negative semiaxis are generated
Friendship not being carried out from different triangular waves and intercepting PWM ripples, the two-way PWM ripples in every phase control six switching tube Vienna rectifications respectively
Two-way PWM ripples phase on two switching tubes on the same bridge arm of device, or every phase with controlling three switching tube Vienna rectifications afterwards
Switching tube on each phase bridge arm of device.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880297A (en) * | 2018-06-29 | 2018-11-23 | 南京理工大学 | A kind of phase compensation device and method based on Vienna rectifier |
| CN109768718A (en) * | 2019-01-17 | 2019-05-17 | 南京理工大学 | A kind of method of Vienna rectifier input current zero cross distortion optimization |
| CN109936298A (en) * | 2017-12-15 | 2019-06-25 | 日立江森自控空调有限公司 | Rectification circuit and power supply device |
| CN110391726A (en) * | 2019-07-26 | 2019-10-29 | 中国矿业大学(北京) | Unidirectional three-phase star connects the suppressing method of controlled rectifier input current Zero-crossing Distortion |
| CN111541382A (en) * | 2020-04-30 | 2020-08-14 | 南京理工大学 | Control method for Vienna rectifier current distortion under heavy load condition |
| 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 |
| CN112421979A (en) * | 2020-11-09 | 2021-02-26 | 深圳市福瑞电气有限公司 | Neutral point balancing method of I-type three-level inverter based on zero-sequence component injection |
| CN113454895A (en) * | 2020-09-14 | 2021-09-28 | 深圳欣锐科技股份有限公司 | Voltage compensation method, device and equipment |
| CN113992039A (en) * | 2021-11-30 | 2022-01-28 | 阳光电源股份有限公司 | Rectifier circuit control method and application device thereof |
| CN116865584A (en) * | 2023-09-04 | 2023-10-10 | 西安千帆翼数字能源技术有限公司 | Two-level converter, control method, SPWM (sinusoidal pulse Width modulation) method and SPWM (sinusoidal pulse Width modulation) system |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109936298A (en) * | 2017-12-15 | 2019-06-25 | 日立江森自控空调有限公司 | Rectification circuit and power supply device |
| CN109936298B (en) * | 2017-12-15 | 2021-02-19 | 日立江森自控空调有限公司 | Rectifier circuit and power supply device |
| CN108880297A (en) * | 2018-06-29 | 2018-11-23 | 南京理工大学 | A kind of phase compensation device and method based on Vienna rectifier |
| CN108880297B (en) * | 2018-06-29 | 2020-12-04 | 南京理工大学 | Phase compensation device and method based on Vienna rectifier |
| CN109768718A (en) * | 2019-01-17 | 2019-05-17 | 南京理工大学 | A kind of method of Vienna rectifier input current zero cross distortion optimization |
| CN110391726A (en) * | 2019-07-26 | 2019-10-29 | 中国矿业大学(北京) | Unidirectional three-phase star connects the suppressing method of controlled rectifier input current Zero-crossing Distortion |
| CN111541382A (en) * | 2020-04-30 | 2020-08-14 | 南京理工大学 | Control method for Vienna rectifier current distortion under heavy load condition |
| CN111541382B (en) * | 2020-04-30 | 2022-06-21 | 南京理工大学 | Control method for Vienna rectifier current distortion under heavy load condition |
| 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 |
| 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 |
| CN113454895A (en) * | 2020-09-14 | 2021-09-28 | 深圳欣锐科技股份有限公司 | Voltage compensation method, device and equipment |
| WO2022052128A1 (en) * | 2020-09-14 | 2022-03-17 | 深圳欣锐科技股份有限公司 | Voltage compensation method, apparatus, and device |
| CN113454895B (en) * | 2020-09-14 | 2022-06-10 | 深圳欣锐科技股份有限公司 | Voltage compensation method, device and equipment |
| CN112421979A (en) * | 2020-11-09 | 2021-02-26 | 深圳市福瑞电气有限公司 | Neutral point balancing method of I-type three-level inverter based on zero-sequence component injection |
| CN113992039A (en) * | 2021-11-30 | 2022-01-28 | 阳光电源股份有限公司 | Rectifier circuit control method and application device thereof |
| CN113992039B (en) * | 2021-11-30 | 2024-04-12 | 阳光电源股份有限公司 | Rectifying circuit control method and application device thereof |
| CN116865584A (en) * | 2023-09-04 | 2023-10-10 | 西安千帆翼数字能源技术有限公司 | Two-level converter, control method, SPWM (sinusoidal pulse Width modulation) method and SPWM (sinusoidal pulse Width modulation) system |
| CN116865584B (en) * | 2023-09-04 | 2023-11-21 | 西安千帆翼数字能源技术有限公司 | Two-level converter, control method, SPWM (sinusoidal pulse Width modulation) method and SPWM (sinusoidal pulse Width modulation) system |
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