CN107785903A - A kind of new Control Method of Active Power Filter - Google Patents
A kind of new Control Method of Active Power Filter Download PDFInfo
- Publication number
- CN107785903A CN107785903A CN201610714206.XA CN201610714206A CN107785903A CN 107785903 A CN107785903 A CN 107785903A CN 201610714206 A CN201610714206 A CN 201610714206A CN 107785903 A CN107785903 A CN 107785903A
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- Prior art keywords
- current
- error
- compensation
- electric current
- active power
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Classifications
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- 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
- Y02E40/20—Active power filtering [APF]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention disclose a kind of new Control Method of Active Power Filter, it is characterised in that this method uses the method for backward difference by continuous time mathematical modeling discretization under α β shaftings.Current tracking is realized using dead-beat control method, using " two clap " delay in the method compensation control of " two-staged prediction ".Sampling error is suppressed to influence caused by electric current using current correction algorithm.This method compensates current track error in the significant time zone of curent change to be compensated, improves the compensation ability of harmonic current, more simple in the method for specific region compensation tracking error；The current correction algorithm proposed for current sample error, can effectively reduce sampling error influences on randomness caused by current control accuracy, improves the control accuracy of electric current.
Description
Technical field
The invention belongs to current track error to compensate field, more particularly to a kind of New Active electricity based on track with zero error
Force filter control method.
Background technology
With the development of Power Electronic Technique, the nonlinear load such as increasing power electronics is applied to industry and the people
Use occasion.Also there is the problem of new thereupon, nonlinear load causes current distortion, and substantial amounts of harmonic wave is injected into power network
Electric current, influence the quality of power supply.Therefore, power quality problem is also therewith by more and more extensive concern, and active power filtering
Device (active power filter, APF) is because of the ability with stronger compensation harmonic electric current, it is considered to be improves electric energy matter
The primary solutions of amount.
At present, existing pertinent literature have studied APF compensation harmonic current methods.Realized using method for controlling hysteresis loop current humorous
Ripple compensates, and current response rate is very fast, but the ring width of stagnant ring and the inversely prroportional relationship of switching frequency influence the control effect of electric current.
Realize that harmonic current tracks using repetitive control, in order to improve the dynamic property of harmonic compensation, using double repetitive controllers
Control electric current, dynamic response is improved while control accuracy is ensured, play certain effect, but be changed significantly in harmonic current
Regional compensation ability it is still insufficient, in load changing, the response time is still limited by Repetitive controller, and dual multiple control
Device processed adds the complexity of algorithm.Adoption rate integral controller control electric current, to the harmonic waves of the different frequencys using different
Integral parameter, realize the proportional plus integral control to electric current.This method is still that each harmonic is divided to administer, and Governance Ability has
Limit, realizes cumbersome, and dynamic process is longer.Adaptive algorithm is applied to compensation harmonic electric current, can obtain preferable stable state and mend
Effect is repaid, but dynamic process is longer, and algorithm realizes that difficulty is larger.
For track with zero error (deadbeat control, DBC) because fast with dynamic response, control accuracy is high, realizes simple
The advantages that and be applied in APF, without carrying out frequency dividing improvement to individual harmonic current.But during DBC is realized,
Because data sampling to data performs the time delayses of presence " two clap ", this must take in DBC.In fact, in number
Control latency issue in word control be present, document just controls delay to do quantitative point to influenceing this problem caused by electric current
Analysis.Except controlling latency issue, during harmonic current tracking is realized, current track error can be to the control accuracy of electric current
Have an impact.The analysis for tracking error to harmonic current in the control method of above-mentioned harmonic wave control is less.
The content of the invention
The present invention devises a kind of novel active power filter control based on track with zero error aiming above mentioned problem
Method processed, this method is under α β shaftings using the method for backward difference by continuous time mathematical modeling discretization.Using indifference
Clap control method and realize current tracking, using " two clap " delay in the method compensation control of " two-staged prediction ".Using electric current school
Normal operation method suppresses sampling error to influence caused by electric current.The technical solution adopted by the present invention is a kind of new active electric power
Filter control method, including current correction algorithm, current tracking compensation error, track with zero error device.Described current correction
Algorithm, it is to suppress (n -1) periodic current sampling error, suppresses the cumulative effect of sampling error.In (n -2) cycle
On the basis of, the electric current in (n -1) cycle is done using the electric current in (n -2) cycle and the output voltage increment in (n -1) cycle
" one-step prediction ", obtains predicted current.The actual current in (n 1) cycle and predicted current are taken into average weighted method
Correcting current is calculated.
Described current tracking compensation error, suppresses to accumulate voltage increment as caused by current track error to harmonic current
The influence of tracking.In the significant time zone compensation current track error of curent change to be compensated, accumulation voltage increment can be eliminated
Influence to harmonic current tracking.
Described track with zero error device, inner ring realizes the quick tracking to electric current using DBC, while current tracking is missed
Difference algorithm and current correction algorithm suppress influence of the error current to control accuracy, improve the control effect of electric current；Outer shroud uses
Capacitance energy storage PI adjusters control DC bus-bar voltage, and its output quantity is active power set-point；In conjunction with instantaneous power theory
The fundamental current set-point of inner ring can be calculated.
The invention has the advantages that the novel active power filter control method, notable in curent change to be compensated
Time zone compensation current track error, the compensation ability of harmonic current is improved, in specific region compensation tracking error
Method is more simple；The current correction algorithm proposed for current sample error, can effectively reduce sampling error to electric current control
Randomness caused by precision processed influences, and improves the control accuracy of electric current.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description.The scope of the present invention not only limits to
In the statement of herein below.Fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
As illustrated, the new type of control method of the switch active electric-power filter of three-phase four of the present invention, including four switches
SVPWM controllers, nonlinear load, control chip.
Described current correction algorithm, it is to suppress (n -1) periodic current sampling error, suppresses the tired of sampling error
Product effect.On the basis of (n -2) cycle, the electric current in (n -2) cycle and the output voltage increment in (n -1) cycle are utilized
" one-step prediction " is done to the electric current in (n -1) cycle, obtains predicted current.By the actual current in (n 1) cycle and prediction electricity
Stream takes average weighted method that correcting current is calculated.Correction coefficient is adjusted, the rapidity of current tracking and steady can be changed
It is qualitative.The less rapidity for improving tracking, and the larger stability for improving tracking.
Described current tracking compensation error, suppresses to accumulate voltage increment as caused by current track error to harmonic current
The influence of tracking.Voltage increment is accumulated in compensation as caused by current track error, so that it may reaches the mesh of compensation current track error
's.In the significant time zone compensation current track error of curent change to be compensated, accumulation voltage increment can be eliminated to harmonic wave electricity
Flow the influence of tracking.If electric current to be compensated, which is in, changes gentle region, it is not necessary to carries out current track error compensation；If wait to mend
Repay electric current and be in the region being changed significantly, take current track error compensation method, suppress accumulation voltage increment.
Described track with zero error device, inner ring realizes the quick tracking to electric current using DBC, while current tracking is missed
Difference algorithm and current correction algorithm suppress influence of the error current to control accuracy, improve the control effect of electric current；Outer shroud uses
Capacitance energy storage PI adjusters control DC bus-bar voltage, and its output quantity is active power set-point；In conjunction with instantaneous power theory
The fundamental current set-point of inner ring can be calculated.
Above with respect to the present invention specific descriptions, without limitation, it will be understood by those within the art that, still
The present invention can be modified or equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all in this hair
Within bright protection domain.
Claims (4)
1. a kind of new Control Method of Active Power Filter, including current correction algorithm, current tracking compensation error, indifference
Clap controller, it is characterised in that this method is discrete by continuous time mathematical modeling using the method for backward difference under α β shaftings
Change, current tracking realized using dead-beat control method, be delayed using " two clap " in the method compensation control of " two-staged prediction ",
Sampling error is suppressed to influence caused by electric current using current correction algorithm.
2. new Control Method of Active Power Filter according to claim 1, it is characterised in that described electric current
Correcting algorithm, it is to suppress (n -1) periodic current sampling error, suppresses the cumulative effect of sampling error, in (n -2) week
On the basis of phase, the electricity using the electric current in (n -2) cycle and the output voltage increment in (n -1) cycle to (n -1) cycle
Stream does " one-step prediction ", obtains predicted current, the actual current in (n 1) cycle and predicted current is taken average weighted
Correcting current is calculated in method.
3. new Control Method of Active Power Filter according to claim 1, it is characterised in that described electric current
Tracing compensation error, suppress to accumulate the influence that voltage increment tracks harmonic current as caused by current track error, waiting to mend
The significant time zone compensation current track error of curent change is repaid, the shadow that accumulation voltage increment tracks to harmonic current can be eliminated
Ring.
4. new Control Method of Active Power Filter according to claim 1, it is characterised in that described indifference
Controller is clapped, inner ring realizes the quick tracking to electric current using DBC, while current track error algorithm and current correction are calculated
Method suppresses influence of the error current to control accuracy, improves the control effect of electric current；Outer shroud uses capacitance energy storage PI adjuster controls
DC bus-bar voltage processed, its output quantity are active power set-point；The base of inner ring can be calculated in conjunction with instantaneous power theory
Ripple given value of current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714206.XA CN107785903A (en) | 2016-08-24 | 2016-08-24 | A kind of new Control Method of Active Power Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610714206.XA CN107785903A (en) | 2016-08-24 | 2016-08-24 | A kind of new Control Method of Active Power Filter |
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| Publication Number | Publication Date |
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| CN107785903A true CN107785903A (en) | 2018-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610714206.XA Pending CN107785903A (en) | 2016-08-24 | 2016-08-24 | A kind of new Control Method of Active Power Filter |
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| Country | Link |
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| CN (1) | CN107785903A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899906A (en) * | 2018-06-08 | 2018-11-27 | 上海电力学院 | A kind of three-phase four-wire system APF is built-in to repeat dead-beat control method |
| CN111082726A (en) * | 2019-12-19 | 2020-04-28 | 南京航空航天大学 | Current control method of permanent magnet motor servo system |
-
2016
- 2016-08-24 CN CN201610714206.XA patent/CN107785903A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899906A (en) * | 2018-06-08 | 2018-11-27 | 上海电力学院 | A kind of three-phase four-wire system APF is built-in to repeat dead-beat control method |
| CN111082726A (en) * | 2019-12-19 | 2020-04-28 | 南京航空航天大学 | Current control method of permanent magnet motor servo system |
| CN111082726B (en) * | 2019-12-19 | 2021-09-21 | 南京航空航天大学 | Current control method of permanent magnet motor servo system |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180309 |
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| WD01 | Invention patent application deemed withdrawn after publication |