CN107492900A - A kind of PR control methods based on α β coordinate systems for PWM rectifier - Google Patents

A kind of PR control methods based on α β coordinate systems for PWM rectifier Download PDF

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CN107492900A
CN107492900A CN201710804306.6A CN201710804306A CN107492900A CN 107492900 A CN107492900 A CN 107492900A CN 201710804306 A CN201710804306 A CN 201710804306A CN 107492900 A CN107492900 A CN 107492900A
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control
coordinate systems
phase
voltage
pwm rectifier
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CN107492900B (en
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赵毅
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Xi'an Thorpe Electric Technology Co Ltd
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Xi'an Thorpe Electric Technology Co Ltd
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    • 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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • 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
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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
    • H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • 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
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks

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

Abstract

A kind of PR control methods based on α β coordinate systems for PWM rectifier, comprise the following steps：1) PWM rectifier topological structure is built；2) the PR rate-determining steps of α β coordinate systems are：A. software looks into the mode of sine table and obtains the phase angle of power network；B. detect PWM rectifier output current and become change commanders iA, iB, iC using 3/2 and transform to α β coordinate systems, obtain i α, i β；C. busbar voltage numerical value is detected, is made the difference with given control targe magnitude of voltage, does pi regulator control, obtain d axle active components, transformed to α β coordinate systems and obtain the active voltage stabilizing composition of id α, id β；D. by gained α β coordinate system informations, make the difference respectively, carry out the PR resonators control of α axles and the PR resonators of β axles control；E. the control information obtained by step d, three-phase modulations ripple is obtained；Form PWM driving pulse driving IGBT inverter bridge actions, rectifying and voltage-stabilizing control；This method operand is few, and unbalanced power supply degree adaptability is high, and fundamental wave control effect is good, and current distortion rate is small, and application prospect is good.

Description

A kind of PR control methods based on α β coordinate systems for PWM rectifier
Technical field
The invention belongs to power electronics control technology field, it is more particularly to a kind of for PWM reorganizers based on α β coordinates The PR control methods of system.
Background technology
With the development of Power Electronic Technique, the trend that PWM rectifier replacement does not control diode rectification is more and more obvious, PWM rectifier can realize the sineization of current on line side, unity power factor, almost not have any pollution to power network.
The topology of PWM rectifications has a lot, but its control mode is following several nothing more than：1) single P of three phase coordinate systems Control method, because being that exchange control is often better than PI controller using single p controllers, shortcoming is obvious：Open-loop gain is relatively low, The degree of unbalancedness of power network, harmonic inhibition capability are poor.2) the PI control methods based on DQ axles, this control method is because exchange is divided Amount, which changes to DQ axles, turns into DC component, control errors can be realized using PI, but pi regulator may only be realized to direct current Indifference, it is very poor to the harmonic disturbance composition effect in power network；For the imbalance problem of power network, because the change of DQ axles needs to divide just Sequence converts and negative phase-sequence change, it is desirable to suppresses uneven disturbance well, it is necessary to do the PI controls of negative phase-sequence axle again, operand increase is not It is few；In the dynamic case there is coupling in two axles to DQ axles simultaneously, and dynamic characteristic is poor.
The content of the invention
To overcome above-mentioned the deficiencies in the prior art, it is an object of the invention to provide it is a kind of for PWM reorganizers based on α β The PR control methods of coordinate system, PR controls (a variety of overtone orders) are carried out in the α β axles of decoupling, not only dynamic decoupling, dynamic response Comparatively fast, and the suppression to unbalanced power supply degree can be realized in the case of less operand, while flexible increase needs The resonator of number effective control can be carried out to the current distortion rates of PWM reorganizers improve.
To achieve the above object, the technical solution adopted by the present invention is：It is a kind of for PWM reorganizers based on α β coordinate systems PR control methods, comprise the following steps：
1) PWM rectifier topological structure is built：Three-phase voltage-type inverter is connected with power network by one reactor of a phase, There is storage capacitor in dc bus, the sineization of voltage stabilizing and input current is realized by the switch motion of current transformer；
2) the PR rate-determining steps of α β coordinate systems are as follows：
A. hardware phase lock high precision circuit power taking net zero crossing is utilized, the mode that software looks into sine table obtains the phase angle of power network；
B. detect PWM rectifier output current and become change commanders iA, iB, iC using 3/2 and transform to α β coordinate systems, obtain i α, i β；
C. busbar voltage numerical value is detected, is made the difference with given control targe magnitude of voltage, is done pi regulator control, obtained after amplitude limit D axle active components, transform to α β coordinate systems and obtain the active voltage stabilizing composition of id α, id β；
D. by α β coordinate system informations obtained by step b, step c, make the difference respectively, carry out the PR resonators control of α axles, enter simultaneously The PR resonators control of row β axles, fundamental wave PR resonators are bases, and other low order or higher order resonances devices are abnormal according to networking electric current Variability situation determines increase and decrease；
E. the control information obtained by step d, 3 phase coordinate systems is transformed to by 2 phase coordinate systems, obtain three-phase modulations ripple；
Three-phase modulations ripple, PWM driving pulse finally is formed using SPWM modulation systems, to drive IGBT inverter bridges to act, Carry out rectifying and voltage-stabilizing control.
The invention has the advantages that：
1) uneoupled control based on α β coordinate systems, dynamic response are fast (the problem of no DQ axles do not decouple)；2) α β coordinates are used The PR control methods of system, it can be very good to suppress influence of the unbalanced power supply to PWM rectifier.3) other can flexibly be increased The PR resonators of the overtone order needed improve to the current distortion rate of PWM rectifier.The control method compares DQ axles Control method operand is few, and unbalanced power supply degree adaptability is high, and it is good to compare three phase coordinate system fundamental wave control effects, current distortion rate It is small, there is very big application prospect.
Brief description of the drawings
Fig. 1 is that the main circuit for the PR control methods based on α β coordinate systems for PWM rectifier that the present invention is introduced is opened up Flutter structural representation.
Fig. 2 is a kind of control for PR control methods based on α β coordinate systems for PWM rectifier that the present invention is introduced Method control block diagram.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in more detail.
Referring to Fig. 1, Fig. 1 is PWM rectifier topological structure.Build PWM rectifier topological structure：Three-phase voltage-type inverter It is connected with power network by one reactor of a phase, dc bus has storage capacitor, is realized by the switch motion of current transformer steady The sineization of pressure and input current；
The PR control methods for the α β coordinate systems that the present invention is carried realize that step is as follows：As shown in Fig. 2.Its specific implementation portion Divide as follows：
A. hardware phase lock high precision circuit power taking net zero crossing is utilized, the mode that software looks into sine table obtains the phase angle of power network；
B. detect PWM rectifier output current and become change commanders iA, iB, iC using 3/2 and transform to α β coordinate systems, obtain i α, i β：
Wherein,
C. busbar voltage numerical value is detected, is made the difference with given control targe magnitude of voltage, is done pi regulator control, obtained after amplitude limit D axle active components, transform to α β coordinate systems and obtain the active voltage stabilizing composition of id α, id β；
Wherein,
D. by α β coordinate system informations obtained by b, c, make the difference respectively, carry out the PR resonators control of α axles, while carry out β axles PR resonators control, and fundamental wave PR resonators are bases, and other low order or higher order resonances devices are according to networking current distortion rate feelings Condition determines increase and decrease；
The s domains of PR resonators pass letter：
Carry out discretization to PR resonators obtains：
Wherein：With the corresponding relation in s domains
a0=4kqωqT
a1=0
a2=-4kqωqT
Using both the above formula, difference expression is obtained, is realized using code.
E. control information obtained by step d, 3 phase coordinate systems are transformed to by 2 phase coordinate systems, arrive three-phase modulations ripple.
Three-phase modulations ripple, PWM driving pulse finally is formed using SPWM modulation systems, to drive IGBT inverter bridges to act, Carry out rectifying and voltage-stabilizing control.

Claims (1)

1. a kind of PR control methods based on α β coordinate systems for PWM rectifier, it is characterised in that comprise the following steps：
1) PWM rectifier topological structure is built：Three-phase voltage-type inverter is connected with power network by one reactor of a phase, direct current There is storage capacitor in bus, the sineization of voltage stabilizing and input current is realized by the switch motion of current transformer；
2) the PR rate-determining steps of α β coordinate systems are as follows：
A. hardware phase lock high precision circuit power taking net zero crossing is utilized, the mode that software looks into sine table obtains the phase angle of power network；
B. detect PWM rectifier output current and become change commanders iA, iB, iC using 3/2 and transform to α β coordinate systems, obtain i α, i β；
C. busbar voltage numerical value is detected, is made the difference with given control targe magnitude of voltage, is done pi regulator control, d axles are obtained after amplitude limit Active component, transform to α β coordinate systems and obtain the active voltage stabilizing composition of id α, id β；
D. by α β coordinate system informations obtained by step b, step c, make the difference respectively, carry out the PR resonators control of α axles, while carry out β The PR resonators control of axle, fundamental wave PR resonators are bases, and other low order or higher order resonances devices are according to networking current distortion Rate situation determines increase and decrease；
E. the control information obtained by step d, 3 phase coordinate systems is transformed to by 2 phase coordinate systems, obtain three-phase modulations ripple；
Three-phase modulations ripple, PWM driving pulse finally is formed using SPWM modulation systems, to drive IGBT inverter bridges to act, carried out Rectifying and voltage-stabilizing controls.
CN201710804306.6A 2017-09-08 2017-09-08 Alpha beta coordinate system-based PR control method for PWM rectifier Active CN107492900B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326598A (en) * 2013-05-20 2013-09-25 河南师范大学 Three-phase rectifier rapid model predictive control method
WO2016006515A1 (en) * 2014-07-08 2016-01-14 国立大学法人大阪大学 Measurement device and measurement method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326598A (en) * 2013-05-20 2013-09-25 河南师范大学 Three-phase rectifier rapid model predictive control method
WO2016006515A1 (en) * 2014-07-08 2016-01-14 国立大学法人大阪大学 Measurement device and measurement method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
曾正: "多功能并网逆变器及其微电网应用", 《中国博士学位论文全文数据库》 *
李子欣等: "PWM整流器在静止坐标系下的准直接功率控制", 《中国电机工程学报》 *

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