CN102868285A - Resonance control method - Google Patents

Resonance control method Download PDF

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Publication number
CN102868285A
CN102868285A CN2011101884754A CN201110188475A CN102868285A CN 102868285 A CN102868285 A CN 102868285A CN 2011101884754 A CN2011101884754 A CN 2011101884754A CN 201110188475 A CN201110188475 A CN 201110188475A CN 102868285 A CN102868285 A CN 102868285A
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China
Prior art keywords
control method
delay
resonance control
link
resonance
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Pending
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CN2011101884754A
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Chinese (zh)
Inventor
王宇
方太勋
吴小丹
杨浩
谢晔源
杨兵
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Application filed by NR Electric Co Ltd, NR Engineering Co Ltd filed Critical NR Electric Co Ltd
Priority to CN2011101884754A priority Critical patent/CN102868285A/en
Priority to PCT/CN2012/077458 priority patent/WO2013004133A1/en
Publication of CN102868285A publication Critical patent/CN102868285A/en
Pending legal-status Critical Current

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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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M7/5387—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 in a bridge configuration
    • H02M7/53871—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 in a bridge configuration with automatic control of output voltage or current
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a resonance control method, which comprises the steps of using a resonance controller to carry out floating control on certain frequency signals in an alternating-current coordinate system and taking a phase correction step to correct closed-loop feedback properties. The resonance control method disclosed by the invention can be used to realize the control on specific sub-harmonic current output by a high-power converter and ensure the normal operation of power system equipment.

Description

A kind of resonance control method
Technical field
The present invention relates to a kind of resonance control method, refer in particular to the method that a kind of method by adding resonance control ring realizes current transformer output harmonic wave Current Control, be applied to the control device in the electronic power convertor system.
Background technology
The existence of harmonic wave causes adverse effect to electric power system, affect the normal operation of power system device, and power electronic equipment or some nonlinear-loads is the main source of Harmonious Waves in Power Systems.Therefore, country formulates relevant criterion the harmonic wave that power electronic equipment produces is proposed strict demand.
Traditional harmonic wave management method is the scheme that installs the LC filter additional, and this scheme compensation ability is limited, need consider electrical network parameter, underaction during design.APF (Active Power Filter-APF) is the study hotspot of realizing at present harmonic current compensation, yet this scheme is because high cost is used less; In addition, the basic ideas of APF are that harmonic current is extracted, and then export opposite offset current, the final realization and the harmonic wave inhibition of place, site.And the extraction of harmonic current needs complicated control algolithm, and Compensation Strategies realizes that difficulty is large, needs accurate control parameter and control sequential, deviation occurs such as design and will cause the mistake compensation.
Based on above analysis, the inventor attempts the harmonic wave in the electronic power convertor is effectively eliminated, and this case produces thus.
Summary of the invention
Main purpose of the present invention is to provide a kind of resonance control method, and it can realize the normal operation of power system device is guaranteed in the control of the specific subharmonic current of high-power converter output.
In order to reach above-mentioned purpose, the technical solution adopted in the present invention is:
A kind of resonance control method comprises and adopts resonant regulator under the interchange coordinate system set specific frequency signal to be carried out the floating adjusting and adopts the phasing link that closed loop feedback character is proofreaied and correct.
The transfer function of above-mentioned resonant regulator is:
H AC ( s ) = 2 K P + 2 K I s s 2 + ω 2
Wherein, K PProportionality coefficient, K IBe integral coefficient, s=j ω is the frequency domain variable, and ω is angular frequency.
The method for designing of above-mentioned phasing link is the delay time of each link of difference calculating control system, comprises: the phase delay between feedback signal and the output signal, sampling keeps time-delay and space vector modulation algorithm time-delay in the real system.
After adopting such scheme, the present invention adopts the resonance control ring to be embodied directly under the AC system floating to electronic power convertor and regulates, and has saved coordinate transformation algorithm; And utilize the characteristic of resonant regulator, in conjunction with the phasing link, consist of the resonance control ring, be applied to the control of power electronics harmonic wave, according to the harmonic number that will eliminate, the designed phase time-delay is counted targetedly, thereby eliminates the specific subharmonic that is produced by controllable rectifier bridge, realizes the control to the specific subharmonic current of high-power converter output.
Description of drawings
Fig. 1 is the control block diagram that the present invention consists of the resonance control ring;
Fig. 2 is the bode figure of resonant regulator among the present invention.
Embodiment
Below with reference to accompanying drawing technical scheme of the present invention is elaborated.
As shown in Figure 1, the invention provides a kind of resonance control method, refer to the phasing link that adopts resonant regulator and closed loop feedback character is proofreaied and correct, wherein, cooperate shown in Figure 2, resonant regulator is in fact the application of direct current PI (proportional integral) adjuster in AC system, by the unlimited amplification to the input specific times harmonic, plays the astatic control in closed-loop control.
The transfer function of supposing direct current PI is:
H DC ( s ) = K P + K I s
Wherein, K pProportionality coefficient, K pBe integral coefficient, s=j ω is the frequency domain variable; ω is angular frequency.
The transfer function that is applied to so the resonant regulator of AC system is:
H AC ( s ) = 2 K P + 2 K I s s 2 + ω 2
According to transfer function, utilize the transfer function under the MATLAB tool design discrete system, take 5 subharmonic as example: design parameter as
ω=5*100 π, switch periods T S=1/3000s
Utilize c2d function (the c2d function is that matlab carries power function, and function is to convert the transfer function model under the continuous system under the discrete system transfer function model) can get resonant regulator discretization transfer function 5 times:
H AC ( z ) = 0.000312 z 2 - 0.000312 z 2 - 1.732 z + 1
And draw bode figure as shown in Figure 2.As can be seen from the figure, for approaching infinitely great gain, such characteristic is so that resonant regulator can be realized astatic control to characteristic frequency to resonant regulator under ω=5*100 π Frequency point.
Please refer to shown in Figure 1ly, is the control block diagram of the resonance control ring that consists of of the present invention again, wherein, and i α .REF, i β .REF is the output current of converter reference value, as to require specific subharmonic is suppressed be 0, can be with i α .REF, i β .REFBe set to 0, i α, i βBe the output current of converter value of feedback.Reference value and value of feedback are subtracted each other and are obtained error signal, and error signal is passed through the phasing link again through specific resonant regulator (method for designing as above), obtains the output voltage reference signal
Figure BDA0000074152330000041
With
Figure BDA0000074152330000042
Wherein the effect of phasing link is the phase difference of adjusting between control system output and the feedback.
Feedback signal is current signal, and output signal is voltage signal.Because the existence of output filtering reactor causes voltage, current signal to have the phase delay of pi/2, in addition, all there are certain time-delay in sampling maintenance and space vector modulation algorithm in the real system, need to compensate by the phasing link.
Take 5 resonance control rings as example explanation phasing link method for designing.
Each link delay time: switch periods T of difference calculating control system S=1/3000, for 5 subharmonic, f 5=250, T 5=1/250.
There are the phase delay of pi/2 in voltage, current signal, and the actual time delay that causes for 5 subharmonic is:
T delay1＝T 5/4
For the PWM modulation system, sampling element and modulation link cause T altogether Delay2=1.5T sTime-delay;
Causing total time-delay is T Delay=T Delay1+ T Delay2
Therefore, in 5 resonance control rings, need to compensate this time-delay, realize the AC system phasing.
Whole system consists of closed loop by feedback, pi regulator, phasing link and output, realizes specific subharmonic control.
Above embodiment only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of doing on the technical scheme basis all falls within the protection range of the present invention.

Claims (3)

1. a resonance control method is characterized in that: comprise and adopt resonant regulator under the interchange coordinate system set specific frequency signal to be carried out the floating adjusting and adopts the phasing link that closed loop feedback character is proofreaied and correct.
2. a kind of resonance control method as claimed in claim 1, it is characterized in that: the transfer function of described resonant regulator is:
H AC ( s ) = 2 K P + 2 K I s s 2 + ω 2
Wherein, K PProportionality coefficient, K IBe integral coefficient, s=j ω is the frequency domain variable, and ω is angular frequency.
3. a kind of resonance control method as claimed in claim 1 or 2, it is characterized in that: the method for designing of described phasing link is the delay time of each link of difference calculating control system, comprise: the phase delay between feedback signal and the output signal, sampling keeps time-delay and space vector modulation algorithm time-delay in the real system.
CN2011101884754A 2011-07-06 2011-07-06 Resonance control method Pending CN102868285A (en)

Priority Applications (2)

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CN2011101884754A CN102868285A (en) 2011-07-06 2011-07-06 Resonance control method
PCT/CN2012/077458 WO2013004133A1 (en) 2011-07-06 2012-06-25 Resonant control method

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CN103219745A (en) * 2013-04-19 2013-07-24 浙江埃菲生能源科技有限公司 Grid-connected inverter control algorithm based on orthogonal sine wave extractor
CN108493937A (en) * 2018-03-12 2018-09-04 深圳市英威腾电气股份有限公司 Inhibit the method, apparatus and control system of gird-connected inverter power grid background harmonics
WO2021169666A1 (en) * 2020-02-25 2021-09-02 浙江大学 Resonance control method for differentiated phase correction

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CN109617437B (en) * 2018-12-14 2020-09-11 天津大学 Design method of three-phase grid-connected converter current loop prediction resonance controller
US10658919B1 (en) 2019-02-25 2020-05-19 Hamilton Sundstrand Corporation Harmonic regulator with loop delay compensation

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103219745A (en) * 2013-04-19 2013-07-24 浙江埃菲生能源科技有限公司 Grid-connected inverter control algorithm based on orthogonal sine wave extractor
CN103219745B (en) * 2013-04-19 2014-12-03 浙江埃菲生能源科技有限公司 Grid-connected inverter control algorithm based on orthogonal sine wave extractor
CN108493937A (en) * 2018-03-12 2018-09-04 深圳市英威腾电气股份有限公司 Inhibit the method, apparatus and control system of gird-connected inverter power grid background harmonics
CN108493937B (en) * 2018-03-12 2021-10-08 深圳市英威腾电气股份有限公司 Method, device and control system for restraining grid-connected inverter power grid background harmonic
WO2021169666A1 (en) * 2020-02-25 2021-09-02 浙江大学 Resonance control method for differentiated phase correction

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Application publication date: 20130109