CN109525122A - A kind of full-controlled rectifier control method of fan motor pitch-controlled system power conversion circuit - Google Patents

A kind of full-controlled rectifier control method of fan motor pitch-controlled system power conversion circuit Download PDF

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Publication number
CN109525122A
CN109525122A CN201811246158.1A CN201811246158A CN109525122A CN 109525122 A CN109525122 A CN 109525122A CN 201811246158 A CN201811246158 A CN 201811246158A CN 109525122 A CN109525122 A CN 109525122A
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phase
voltage
formula
current
input
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管晓文
李焯镜
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MingYang Smart Energy Group Co Ltd
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MingYang Smart Energy Group Co Ltd
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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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H02J3/386—
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a kind of full-controlled rectifier control methods of fan motor pitch-controlled system power conversion circuit, the circuit includes the power input filtering part being sequentially connected, rectifying part, dc-link capacitance and Converting Unit, this method is to carry out full-controlled rectifier to rectifying part, it is required that rectifying part is the three-phase bridge rectifier circuit being made of six switching tube IGBT, and two switching tube IGBT are opened and are turned off by the way of complementary same bridge arm up and down, by controlling opening timing and duty ratio and controlling the input current of entire pitch-controlled system for above-mentioned six switching tube IGBT in actual moving process, become phase and the consistent sine-wave current of power grid three-phase input voltage, system power factor is close to 1, to improve whole system power factor, and the aberration rate of input current can be effectively reduced With harmonic content, and then influence of the pitch-controlled system to power grid is reduced.

Description

A kind of full-controlled rectifier control method of fan motor pitch-controlled system power conversion circuit
Technical field
The present invention relates to the technical fields of electric variable propeller system of wind generating set, refer in particular to a kind of fan motor variable pitch The full-controlled rectifier control method of system power translation circuit.
Background technique
Electric variable propeller system of wind generating set generallys use the transformation of electrical energy mode of cross-straight-intersection, i.e. electric variable pitch at present System first rectifies the three phase mains of power grid input, it is converted to direct current by three-phase alternating current, then again by inverse Become part into voltage and the adjustable alternating current of frequency to be used to that pitch motor to be driven to run by DC conversion.
In above-mentioned transformation of electrical energy circuit prime rectification circuit generally use diode constitute can not control rectifying circuit or The half-controlled rectifier circuit being made of diode and thyristor, diode/thyristor in the above rectification circuit practical work process Conducting depends entirely on the size of input voltage and output voltage with shutdown, does not use additional modulation system, on the one hand defeated It is big to enter current waveform distortion, power factor is low, and the efficiency of whole system reduces；Containing a large amount of humorous in another aspect input current Wave component, which is applied to power grid will affect the power grid quality of entire wind power generating set later, to the remaining part of unit It has an impact, influences the working performance and reliability of entire unit.Therefore power factor, the reduction for improving entire pitch-controlled system are defeated Enter the aberration rate of electric current and harmonic content is very necessary.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology and deficiency, proposes a kind of fan motor pitch-controlled system function The full-controlled rectifier control method of rate translation circuit, the program use full-controlled rectifier mode, running for rectifying part Input current is modulated by real-time sampling power grid three-phase input voltage and rectifier output voltage information in the process, makes three-phase Input current waveform become with the consistent sine wave of input voltage waveform phase, system power factor is close to 1, to improve whole A system power factor, and the aberration rate and harmonic content of input current can be effectively reduced, and then reduce pitch-controlled system Influence to power grid.
To achieve the above object, a kind of technical solution provided by the present invention are as follows: fan motor pitch-controlled system power factor The full-controlled rectifier method of correcting circuit, the circuit of power factor correction includes the power input filtering part being sequentially connected, whole Stream part, dc-link capacitance and Converting Unit；Wherein, this method is to carry out full-controlled rectifier to rectifying part, it is desirable that rectification part Dividing is the three-phase bridge rectifier circuit being made of six switching tube IGBT, and two switching tube IGBT are used mutually same bridge arm up and down The mode of benefit is opened and is turned off, in actual moving process by control above-mentioned six switching tube IGBT open timing with Duty ratio controls the input current of entire pitch-controlled system, becomes phase and the consistent sine wave of power grid three-phase input voltage Electric current, to achieve the purpose that improve pitch-controlled system power factor and reduce input current abnormality rate and harmonic content；It is specific It is as follows:
According to coordinate transform formula, i in the input current two-phase rotating coordinate system of pitch-controlled systemd、iqComponent and three phase static I in coordinate systema、ib、icShown in component corresponding relationship such as formula (1):
In formula, θ is coordinate transform angle；
As quadrature axis component iqWhen=0, shown in three-phase input current such as formula (2):
Shown in the power grid three-phase input voltage such as formula (3) of pitch-controlled system:
In formula, UmTo input grid voltage amplitude, ω is network voltage frequency；
Contrast (2), formula (3) discovery, when three-phase input current coordinate transform angle θ is equal to three-phase input voltage phase ω t When, three-phase input current will be as the sine wave with input voltage same-phase；
It is obtained shown in three-phase input voltage phase such as formula (4) from formula (3):
Whole system uses voltage-to-current double-closed-loop control, and outer ring is Voltage loop, and inner ring is electric current loop；In pitch-controlled system In operational process, pass through real-time sampling busbar voltage UdcU is instructed with busbar voltagedc *It is compared, difference is adjusted by voltage Device adjusts output as input current direct-axis component and instructs id *, according to formula (2), input current instruction quadrature axis component is set as iq *=0, real-time sampling three-phase input current i in system operationa、ib、ic, pass through three phase static/two-phase rotating coordinate transformation It is converted into i in two-phase rotating coordinate systemd、iqComponent actually enters electric current id、iqComponent instructs i with input current respectivelyd *、 iq *Component is compared, and it is voltage instruction component in two-phase rotating coordinate system that difference, which adjusts output by current regulator respectively, Ud *、Uq *, voltage instruction component Ud *、Uq *It is converted into three-phase static coordinate system by two-phase rotation/three phase static coordinate transform Voltage instruction component Ua *、Ub *、Uc *, then three-phase voltage command is inputted as the modulating wave of pulsewidth modulation link, through pulsewidth modulation The driving signal of six switching tube IGBT of three-phase bridge rectifier circuit is exported afterwards；
According to formula (2), formula (3), in order to become input current and the consistent sine-wave current of input voltage phase, input Coordinate transform angle in electric current coordinate transformation process should be consistent with three-phase input voltage phase, three-phase input voltage phase It can be calculated and be obtained further according to formula (4) by sampling three-phase input voltage.
Compared with prior art, the present invention have the following advantages that with the utility model has the advantages that
1, using diode can not the half-controlled rectifier circuit that constitutes of control rectifying circuit or diode-thyristor, due to power The conducting of switching device and shutdown depend entirely on the size of input voltage and output voltage, not additional modulation circuit, because The distortion of this input current waveform is big, and power factor is low, thus the efficiency of whole system reduces.This programme is due to using full-controlled rectifier Mode is modulated input current with rectifier output voltage information according to the input voltage of sampling in system operation, makes Input current become with the consistent sine-wave current of input voltage phase, system power factor is close to 1, therefore whole system Efficiency is improved.
2, using diode can not the half-controlled rectifier circuit that constitutes of control rectifying circuit or diode-thyristor, input current Wave distortion is big, influences wind power generating set so that power grid quality is deteriorated containing the harmonic component for largely generating pollution to power grid The performance and stability of other component.This programme due to using full-controlled rectifier mode, in system operation to input current into Row modulation, becomes sine-wave current, and harmonic component significantly reduces, reduces pollution of the pitch-controlled system to power grid, improve The performance and reliability of entire wind power generating set.
Detailed description of the invention
Fig. 1 is the fan motor pitch-controlled system power conversion circuit schematic diagram with three-phase bridge rectifier circuit.
Fig. 2 is the control principle block diagram of the method for the present invention.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Fan motor pitch-controlled system power conversion circuit provided by the present embodiment, the mainly power input by being sequentially connected Filtering part, rectifying part, dc-link capacitance and Converting Unit are constituted, and full-controlled rectifier controlling party provided by the present embodiment Method is then the rectifying part progress full-controlled rectifier for above-mentioned power conversion circuit, and other than rectifying part, the circuit is other Part is identical as power conversion circuit corresponding part used by current fan motor pitch-controlled system.Wherein, this method requires whole Stream part is the three-phase bridge rectifier circuit being made of six switching tube IGBT of G1-G6, and same bridge arm is required to open for two up and down It closes pipe IGBT to be opened and turned off by the way of complementary, as shown in Figure 1, by controlling above-mentioned six in actual moving process Switching tube IGBT's opens timing and duty ratio to control the input current of entire pitch-controlled system, becomes phase and power grid three The consistent sine-wave current of phase input voltage, thus reach improve pitch-controlled system power factor and reduce input current abnormality rate with The purpose of harmonic content.Its is specific as follows:
According to coordinate transform formula, i in the input current two-phase rotating coordinate system of pitch-controlled systemd、iqComponent and three phase static I in coordinate systema、ib、icShown in component corresponding relationship such as formula (1):
In formula, θ is coordinate transform angle.
As quadrature axis component iqWhen=0, shown in three-phase input current such as formula (2):
Shown in the three-phase input network voltage such as formula (3) of pitch-controlled system:
In formula, UmTo input grid voltage amplitude, ω is network voltage frequency.
Contrast (2), formula (3) are it can be found that when three-phase input current coordinate transform angle θ is equal to three-phase input voltage phase When ω t, three-phase input current will be as the sine wave with input voltage same-phase.
It is obtained shown in three-phase input voltage phase such as formula (4) from formula (3):
Based on the above voltage-to-current mathematical model, control principle block diagram such as Fig. 2 of above-mentioned three-phase bridge rectifier circuit is constructed It is shown.
Whole system uses voltage-to-current double-closed-loop control, and outer ring is Voltage loop, and inner ring is electric current loop.In pitch-controlled system In operational process, pass through real-time sampling busbar voltage UdcU is instructed with busbar voltagedc *It is compared, difference is adjusted by voltage Device adjusts output as input current direct-axis component and instructs id *, according to formula (2), input current instruction quadrature axis component is set as iq *=0, real-time sampling three-phase input current i in system operationa、ib、ic, pass through three phase static/two-phase rotating coordinate transformation It is converted into i in two-phase rotating coordinate systemd、iqComponent actually enters electric current id、iqComponent instructs i with input current respectivelyd *、 iq *Component is compared, and it is voltage instruction component in two-phase rotating coordinate system that difference, which adjusts output by current regulator respectively, Ud *、Uq *, voltage instruction component Ud *、Uq *It is converted into three-phase static coordinate system by two-phase rotation/three phase static coordinate transform Voltage instruction component Ua *、Ub *、Uc *, then three-phase voltage command is inputted as the modulating wave of pulsewidth modulation link, through pulsewidth modulation The driving signal of six switching tube IGBT of three-phase bridge rectifier circuit is exported afterwards.
According to formula (2), formula (3), in order to become input current and the consistent sine-wave current of input voltage phase, input Coordinate transform angle in electric current coordinate transformation process should be consistent with three-phase input voltage phase, three-phase input voltage phase It can be calculated and be obtained further according to formula (4) by sampling three-phase input voltage.
Embodiment described above is only the preferred embodiments of the invention, and but not intended to limit the scope of the present invention, therefore All shapes according to the present invention change made by principle, should all be included within the scope of protection of the present invention.

Claims (1)

1. a kind of full-controlled rectifier control method of fan motor pitch-controlled system power conversion circuit, the circuit of power factor correction Including power input filtering part, rectifying part, dc-link capacitance and the Converting Unit being sequentially connected；It is characterized by: should Method is to carry out full-controlled rectifier to rectifying part, it is desirable that rectifying part is the three-phase bridge rectification being made of six switching tube IGBT Circuit, and two switching tube IGBT are opened and are turned off by the way of complementary same bridge arm up and down, in actual moving process In by controlling opening timing and duty ratio and controlling the input current of entire pitch-controlled system for above-mentioned six switching tube IGBT, make It becomes phase and the consistent sine-wave current of power grid three-phase input voltage, improves pitch-controlled system power factor and drop to reach The purpose of low input current abnormality rate and harmonic content；Its is specific as follows:
According to coordinate transform formula, i in the input current two-phase rotating coordinate system of pitch-controlled systemd、iqComponent and three phase static coordinate I in systema、ib、icShown in component corresponding relationship such as formula (1):
In formula, θ is coordinate transform angle；
As quadrature axis component iqWhen=0, shown in three-phase input current such as formula (2):
Shown in the power grid three-phase input voltage such as formula (3) of pitch-controlled system:
In formula, UmTo input grid voltage amplitude, ω is network voltage frequency；
The discovery of contrast (2), formula (3), when three-phase input current coordinate transform angle θ is equal to three-phase input voltage phase ω t, three Phase input current will be as the sine wave with input voltage same-phase；
It is obtained shown in three-phase input voltage phase such as formula (4) from formula (3):
Whole system uses voltage-to-current double-closed-loop control, and outer ring is Voltage loop, and inner ring is electric current loop；It is run in pitch-controlled system In the process, pass through real-time sampling busbar voltage UdcU is instructed with busbar voltagedc *It is compared, difference passes through voltage regulator tune Section output instructs i as input current direct-axis componentd *, according to formula (2), input current instruction quadrature axis component is set as iq *= 0, real-time sampling three-phase input current i in system operationa、ib、ic, by three phase static/two-phase rotating coordinate transformation by its Be converted to i in two-phase rotating coordinate systemd、iqComponent actually enters electric current id、iqComponent instructs i with input current respectivelyd *、iq *Point Amount is compared, and it is voltage instruction component U in two-phase rotating coordinate system that difference, which adjusts output by current regulator respectively,d *、 Uq *, voltage instruction component Ud *、Uq *The electricity in three-phase static coordinate system is converted by two-phase rotation/three phase static coordinate transform Pressure instruction component Ua *、Ub *、Uc *, then three-phase voltage command is inputted as the modulating wave of pulsewidth modulation link, after pulsewidth modulation Export the driving signal of six switching tube IGBT of three-phase bridge rectifier circuit；
According to formula (2), formula (3), in order to become input current and the consistent sine-wave current of input voltage phase, input current Coordinate transform angle in coordinate transformation process should be consistent with three-phase input voltage phase, and three-phase input voltage phase can It is calculated and is obtained further according to formula (4) by sampling three-phase input voltage.
CN201811246158.1A 2018-10-25 2018-10-25 A kind of full-controlled rectifier control method of fan motor pitch-controlled system power conversion circuit Pending CN109525122A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101106338A (en) * 2006-07-14 2008-01-16 上海神源电气有限公司 Bidirectional power flow efficient energy saving converter
CN101667787A (en) * 2009-09-30 2010-03-10 大连光洋科技工程有限公司 Voltage oriented energy bidirectional flowing rectifier control device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101106338A (en) * 2006-07-14 2008-01-16 上海神源电气有限公司 Bidirectional power flow efficient energy saving converter
CN101667787A (en) * 2009-09-30 2010-03-10 大连光洋科技工程有限公司 Voltage oriented energy bidirectional flowing rectifier control device

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