CN109524965A - A kind of inhibition system of PWM rectifier harmonic wave - Google Patents
A kind of inhibition system of PWM rectifier harmonic wave Download PDFInfo
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- CN109524965A CN109524965A CN201811584223.1A CN201811584223A CN109524965A CN 109524965 A CN109524965 A CN 109524965A CN 201811584223 A CN201811584223 A CN 201811584223A CN 109524965 A CN109524965 A CN 109524965A
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses a kind of inhibition systems of PWM rectifier harmonic wave.The system includes: current regulating module comprising current regulator and adder, current regulator include pi regulator, repetitive controller and resonant controller；Pi regulator, for the first component of output voltage to be tracked and obtained to the fundamental current in electric current；Repetitive controller inhibits ± 1 subharmonic of 6n for being tracked to six harmonics in electric current and obtains output voltage second component；Resonant controller inhibits triple-frequency harmonics for being tracked to two harmonics in electric current and obtains output voltage third component；Adder, for being overlapped the first component of output voltage, output voltage second component, output voltage third component to obtain output voltage.By the above-mentioned means, the present invention can inhibit 6n ± 1 time as caused by network voltage and dead time effect such as five times, the seventh harmonic and the triple-frequency harmonics as caused by unbalanced power supply simultaneously.
Description
Technical field
This application involves power electronics fields, more particularly to a kind of inhibition system of PWM rectifier harmonic wave.
Background technique
With the rapid development of society, electric energy plays more and more important in industrial and agricultural production and people's daily life
Effect, however the power electronics conversion equipment for concurrently living closely related with national product, such as frequency converter, HF switch electricity
The various current converters such as source, inverter bring a large amount of reactive power and serious harmonic wave to power grid in extensive
Pollution.With the development of power electronics technology, PWM rectifier is come into being, and successfully replaces uncontrollable diode rectifier and phase
The silicon controlled rectifier of control, and become the hot spot of power electronic technique research.
When PWM rectifier is in inverter mode, on electric energy feedback to power grid.In PWM rectifier practical work process,
The problem of to prevent the opening turn-off delay of power device and causing bridge arm direct pass, it usually needs in the driving signal of switching tube
It is inserted into dead time, upper and lower bridge arm thus can be generated and be turned off and actual output voltage is caused to generate distortion, dead zone voltage is usual
It is to be embodied with 5,7 primary current harmonic waves.Simultaneously because 5,7,11,13 subharmonic itself can be had in power grid, it is orthogonal in d-q two-phase
Under coordinate, voltage harmonic shows as AC compounent, and AC compounent can not be tracked by being limited by bandwidth and limiting traditional pi regulator, because
The biggish 5,7 primary current harmonic wave of amplitude can be generated in this electric current.
On the other hand, in such as factory, school, the more occasion of the load equipments such as market, if in power grid there are capacity compared with
Big unbalanced load lacks idle controlling device, will aggravate the degree of unbalancedness of power grid, unbalanced power grid will cause rectifier
Input side electric current contain 3 subharmonic and busbar voltage contains two harmonics.
Therefore under the influence of many factors, the input current of PWM rectifier can have harmonic wave abundant, be unable to satisfy PWM
Every harmonic requirement of the rectifier about IEEE519-92.
Summary of the invention
The application provides a kind of inhibition system of PWM rectifier harmonic wave, can inhibit to be imitated by network voltage and dead zone simultaneously
Answer ± 1 subharmonic of caused 6n and the triple-frequency harmonics as caused by unbalanced power supply.
In order to solve the above technical problems, the technical solution that the application uses is: providing a kind of PWM rectifier harmonic wave
Inhibition system, the system include: current regulating module comprising current regulator and adder, for being tracked to electric current
To obtain output voltage；Current regulator includes pi regulator, repetitive controller and resonant controller；Pi regulator, for pair
Fundamental current in electric current is tracked and obtains the first component of output voltage；Repetitive controller, for six times in electric current
Frequency component is tracked to inhibit ± 1 subharmonic of 6n and obtain output voltage second component；Resonant controller, for in electric current
Two harmonics tracked to inhibit triple-frequency harmonics and obtain output voltage third component；Adder, for electricity will to be exported
The first component, output voltage second component, output voltage third component is pressed to be overlapped to obtain output voltage.
The beneficial effect of the application is: the inhibition system of the harmonic wave of PWM rectifier of the invention by pi regulator it
Outer setting repetitive controller and resonant controller, wherein repetitive controller is for tracking six harmonics in electric current
To inhibit ± 1 subharmonic of 6n, resonant controller is used to track two harmonics in electric current to inhibit triple-frequency harmonics, from
And can inhibit simultaneously 5,7 subharmonic as caused by network voltage and dead time effect and as caused by unbalanced power supply it is humorous three times
Wave meets every harmonic requirement of the PWM rectifier about IEEE519-92.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of first embodiment of the invention；
Fig. 2 is the schematic diagram of repetitive controller in Fig. 1；
Fig. 3 is the Bode diagram of repetitive controller shown in Fig. 2；
Fig. 4 is the current on line side THD frequency spectrum added in current regulator before and after repetitive controller under unbalanced power grid
Comparison diagram；
Fig. 5 is the Bode diagram of resonant controller in Fig. 1；
Fig. 6 is the relation schematic diagram of gain coefficient and triple-frequency harmonics in resonant controller shown in Fig. 5；
Fig. 7 is the current on line side THD frequency spectrum pair added in current regulator before and after resonance device under unbalanced power grid
Than figure；
Fig. 8 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of second embodiment of the invention；
Fig. 9 is the structural schematic diagram of one embodiment of clipping module in Fig. 8；
Figure 10 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of third embodiment of the invention；
Figure 11 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of fourth embodiment of the invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiment of the application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Term " first ", " second ", " third " in the application are used for description purposes only, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second ", " are defined as a result,
Three " feature can explicitly or implicitly include at least one of the features.In the description of the present application, the meaning of " plurality " is extremely
It is two few, such as two, three etc., unless otherwise specifically defined.The directional instruction of institute is (all in the embodiment of the present application
Such as up, down, left, right, before and after ...) it is only used for explaining in the phase under a certain particular pose (as shown in the picture) between each component
To positional relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith
Become.In addition, term " includes " and " having " and their any deformations, it is intended that cover and non-exclusive include.Such as comprising
The process, method, system, product or equipment of a series of steps or units are not limited to listed step or unit, and
It is optionally further comprising the step of not listing or unit, or optionally further comprising for these process, methods, product or equipment
Intrinsic other step or units.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Fig. 1 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of first embodiment of the invention.As shown in Figure 1,
The inhibition system 100 includes current regulating module 10, and current regulating module 10 includes current regulator 11 and adder 12, is used for
Electric current is tracked to obtain output voltage.
Specifically, current regulator 11 includes pi regulator 111, repetitive controller 112 and resonant controller 113.PI
Adjuster 111 is for tracking the fundamental current in electric current and obtaining the first component of output voltage；Repetitive controller 112 is used
In being tracked to six harmonics in electric current to inhibit ± 1 subharmonic of 6n and obtain output voltage second component；Resonance control
Device 113 processed is for tracking two harmonics in electric current to inhibit triple-frequency harmonics and obtain output voltage third component.
Adder 12 is connect with pi regulator 111, repetitive controller 112 and resonant controller 113 respectively, is used for pi regulator 111
The first component of output voltage of output, the output voltage second component of the output of repetitive controller 112, resonant controller 113 export
Output voltage third component be overlapped to obtain output voltage.
In practical applications, pi regulator 111 is the module to play a leading role in current regulator 11, for realizing pair
The zero steady state error control of current first harmonics, but limited by electric current loop bandwidth, to the tracking ability of AC compounent in given value of current
It is poor therefore limited to the control ability of high-frequency signal, so increasing repetitive controller 112 for being with six frequencys multiplication in electric current
Main AC compounent is tracked to inhibit ± 1 subharmonic of 6n.
It is the schematic diagram of repetitive controller in Fig. 1 please also refer to Fig. 2, Fig. 2.As shown in Fig. 2, repetitive controller 112 wraps
Include addition unit 1121, interior form unit 1122, cycle delay unit 1123, the first compensating unit 1124 and the second compensating unit
1125。
Wherein, input terminal of the input terminal of addition unit 1121 as repetitive controller 112, addition unit 1121 it is another
One input terminal connects the output end of interior form unit 1122, the output with addition unit 1121 respectively of the input terminal of interior form unit 1122
End is connected with the input terminal of cycle delay unit 1123, the output end of cycle delay unit 1123 and the first compensating unit 1124
Input terminal connection, the output end of the first compensating unit 1124 are connect with the input terminal of the second compensating unit 1125, and the second compensation is single
Output end of the output end of member 1125 as repetitive controller 112.
Wherein, interior form unit 1122 includes concatenated internal model constant unit and internal model delay cell, and internal model constant unit is Q
(z), internal model delay cell is Z-N；Cycle delay unit 1123 is Z-N；First compensating unit 1124 includes concatenated gain coefficient
Unit and phase lead compensation unit, gain coefficient unit are Kr, and phase lead compensation unit is Zk；Second compensating unit 1125
It is usually low-pass filter or 1/P (z) for S (z), S (z), P (z) is the transmission function of controlled device；Wherein, N is an electric current
The sampling number of primitive period, k are phase compensation factor.
It is the Bode diagram of repetitive controller shown in Fig. 2 please also refer to Fig. 3, Fig. 3.As shown in figure 3, repetitive controller
112 have gain at the frequency of the integral multiple of fundamental wave (50Hz), therefore the addition of repetitive controller 112 can reinforce electric current tune
Device 11 is saved to the tracking ability of integral frequency harmonizing wave, and then the inhibition to 6n ± 1 time such as 5,7 inferior harmonic waves may be implemented.Wherein,
Gain coefficient unit Kr is bigger, stronger to harmonic track ability.
It is emphasized that repetitive controller 112 is in addition to having good inhibitory effect to ± 1 subharmonic of 6n, it is secondary to other
Harmonic wave such as 3 subharmonic also have certain inhibitory effect.That is, repetitive controller 112 mainly inhibits 6n ± 1 time humorous
Wave, but inhibiting effect can also be played to other subharmonic simultaneously.
Please also refer to the net that Fig. 4, Fig. 4 are before and after adding repetitive controller in current regulator under unbalanced power grid
Side electric current THD spectral contrast figure.As shown in figure 4, addition repetitive controller 112 before namely current regulator 11 only include PI tune
When saving device 111,3 subharmonic contents are 3.5%, and 5,7 subharmonic are respectively 0.66% and 0.24%, add repetitive controller 112
When afterwards namely current regulator includes simultaneously pi regulator 111 and repetitive controller 112,3 subharmonic contents are 2.4%, are reduced
1/3 or so, 5,7 subharmonic are respectively 0.33%, 0.13%, reduce 1/2 or so.
From fig. 4, it can be seen that increasing repetitive controller 112,5 on the basis of pi regulator 111,7 subharmonic obtain
Very big inhibition, but the content of 3 subharmonic is still very big, so further increasing resonant controller in current regulator 11
113 to control the AC compounent in electric current based on two frequencys multiplication, namely reinforces the tracking ability of two frequencys multiplication to inhibit three
Subharmonic.
In the present embodiment, in order to guarantee that the stability of current regulator 11, resonant controller 113 are preferably quasi-resonance control
Device processed.In practical applications, ideal resonant controller, can be to system due to its gain infinity at resonance frequency
Stability generates significant impact, therefore in control field, is to obtain the high-gain at resonance frequency simultaneously and do not lose
It unites stability, proposes a kind of control of quasi-resonance, the difference of it and ideal resonant controller is its gain at resonance frequency
It is not infinitely great.
In the present embodiment, the transmission function F (s) of resonant controller 113 are as follows:
Wherein, Kf is the gain coefficient of resonant controller, and ω c is the quality factor of resonance control, and ω n is resonance frequency.
In the present embodiment, the electrical network angular frequency that ω n is twice, ω c is preferably 5.
It is the Bode diagram of resonant controller in Fig. 1 please also refer to Fig. 5 and Fig. 6, Fig. 5, Fig. 6 is the control of resonance shown in Fig. 5
The relation schematic diagram of gain coefficient and triple-frequency harmonics in device.As shown in figure 5, resonant controller 113 is in resonance dot frequency namely electricity
Gain near two frequencys multiplication of stream is larger, and it is obvious to decay for the signal of other frequencies, therefore by resonant controller 113
It can be realized the DAZ gene to two frequencys multiplication in electric current.As shown in fig. 6, with the increasing of gain coefficient Kf in resonant controller
Greatly, triple-frequency harmonics size tends to restrain, therefore can select optimal gain coefficient Kf value to reach triple-frequency harmonics most
Excellent inhibitory effect.
Please also refer to the net side that Fig. 7, Fig. 7 are before and after adding resonance device in current regulator under unbalanced power grid
Electric current THD spectral contrast figure.As shown in fig. 7, addition resonant controller 113 before namely current regulator 11 include pi regulator
111 and when repetitive controller 112,3 subharmonic contents are 2.4%, and 5,7 subharmonic contents are respectively 0.33%, 0.13%.Addition
After resonant controller 113 namely current regulator 11 includes pi regulator 111, repetitive controller 112 and repetitive controller 113
When, 3 subharmonic contents are 0.9%, are fallen sharply, 5,7 subharmonic contents are respectively 0.35%, 0.12%, are not almost become
Change.
Fig. 8 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of second embodiment of the invention.As shown in figure 8,
Inhibition system shown in Fig. 8 200 and inhibition system 100 shown in FIG. 1 the difference is that: current regulating module 10 further comprises
Clipping module 13.
Wherein, clipping module 13 is connected between current regulator 11 and adder 12, for dividing output voltage first
Output voltage first after amount, output voltage second component, output voltage third component progress amplitude limiting processing after output violent change divides
Amount, output voltage second component, output voltage third component to adder 12.
It is the structural schematic diagram of one embodiment of clipping module in Fig. 8 please also refer to Fig. 9, Fig. 9.As shown in figure 9, clipping mould
Block 13 includes the first clipping unit 131, the first configuration unit 132, the second clipping unit 133, the second configuration unit 134 and third
Clipping unit 135.
First clipping unit 131 is used to after carrying out amplitude limiting processing to the first component of output voltage according to the first range value export
The first component of output voltage after clipping.
First configuration unit 132 is connect with the first clipping unit 131, for obtaining the first width from the first clipping unit 131
After the first component of output voltage after angle value and clipping, obtained according to the first component of output voltage after the first range value and clipping
Second range value.Wherein, the second range value is the difference of the first component of output voltage after the first range value and clipping.
Second clipping unit 133 is connect with the first configuration unit 132, is configured for basis from the first configuration unit 132
Second range value is to the output voltage second component after output violent change after output voltage second component progress amplitude limiting processing.
Second configuration unit 134 is connect with the second clipping unit 133, for obtaining the second width from the second clipping unit 133
After output voltage second component after angle value and clipping, obtained according to the output voltage second component after the second range value and clipping
Third range value.Wherein, third range value is the difference of the output voltage second component after the second range value and clipping.
Third clipping unit 135 is connect with the second configuration unit 134, is configured for basis from the second configuration unit 134
Third range value is to the output voltage third component after output violent change after output voltage third component progress amplitude limiting processing.
In the present embodiment, pi regulator 111, repetitive controller 112 and resonance in 11 operational process of current regulator
Controller 113 acts on simultaneously, and pi regulator 111 plays a leading role as the main function module of current regulator 11, repeats to control
Device 112 processed and 113 redeeming of resonant controller, wherein repetitive controller 112 is used to inhibit main subharmonic, such as 5,7
Subharmonic, resonant controller 113 are mainly used for the 3 subharmonic inhibition under the conditions of unbalanced power supply.To prevent repetitive controller 112
With 113 parameter error of resonant controller and influence the stability of system entirety, clipping module 13 uses nested type amplitude limit method,
That is pi regulator 111 first meets its stability as primary link, therefore first with the first clipping unit 131 and first
Amplitude limit value carries out clipping to it, in the case where the output of pi regulator 111 meets condition, with the amplitude limit value of pi regulator 111
That is the difference of the first component of output voltage after the first amplitude limit value and real output value namely clipping is as repetitive controller 112
Amplitude limit value namely the second amplitude limit value limit repetitive controller 112 followed by the second clipping unit 133 and the second amplitude limit value
Width, in the case where the output of repetitive controller 112 meets amplitude limit value, with the amplitude limit value of repetitive controller 112 namely the second clipping
The difference namely third range value conduct of value and the output voltage second component after 112 reality output of repetitive controller namely clipping
The amplitude limit value of resonant controller 113 carries out resonant controller 113 followed by third clipping unit 135 and third amplitude limit value
Clipping.
It is understood that working as the pi regulator 111 of electric current, repetitive controller 112, resonant controller 113 is in d-q coordinate
When being carried out under system, voltage amplitude limiting processing can be done using clipping module 13 under d-q coordinate system and make pi regulator 111, repeat to control
The output voltage summation of device 112 processed, resonant controller 113 does not exceed reality output ability, can accelerate current regulation in this way
Device 11 moves back saturated velocity, accelerates the convergence rate of current control.
Figure 10 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of third embodiment of the invention.Such as Figure 10 institute
Show, which includes the first coordinate transferring 21, the first subtracter 22, voltage regulator 23, the second subtracter 24, the
Three subtracters 25, the first current regulating module 26, the second current regulating module 27, the second coordinate transferring 28, space vector
Modulation module 29 and phaselocked loop 30.Wherein, the first current regulating module 26 includes the first pi regulator 261, the first Repetitive controller
Device 262, the first resonant controller 263, first adder 264 and the first clipping module 265；Second current regulating module 27 includes
Second pi regulator 271, the second repetitive controller 272, the second resonant controller 273, second adder 274 and the second clipping mould
Block 275.
First coordinate transferring 21 is connect with PWM rectifier 310, for the three-phase electricity obtained from PWM rectifier 310
Flow ia、ibAnd icThe dq shaft current namely q shaft current component i for being coordinately transformed to obtain under d-q two-phase orthogonal coordinate systemqWith d axis
Current component id.Wherein, the coordinate of the first coordinate transferring 21 is transformed to Clarke (CLARKE) and Parker (PARK) transformation.
First subtracter 22 and PWM rectifier 310 connect, and are used for given reference voltage udcrefWith from PWM rectifier 310
The busbar voltage u of acquisitiondcOutput voltage difference DELTA u after progress subtractiondc。
Voltage regulator 23 is connect with the first subtracter 22, and it is defeated that the input terminal of voltage regulator 23 receives the first subtracter 22
Voltage difference Δ u outdc, the output end output of voltage regulator 23 is to voltage difference Δ udcExported after being tracked
One reference current idref。
Second subtracter 24 is connect with the first coordinate transferring 21, is used for given reference current iqrefWith the first coordinate
The q shaft current component i that conversion module 21 exportsqIt carries out subtraction and obtains q axis error electric current Δ iq。
Third subtracter 25 is connect with the first coordinate transferring 21 and voltage regulator 23 respectively, for adjusting voltage
The first reference current i that device 23 exportsdrefWith the d shaft current component i of the first coordinate transferring 21 outputdCarry out subtraction
Obtain d axis error electric current Δ id。
First pi regulator 261, the first repetitive controller 262, the first resonant controller 263 input terminal and the second subtraction
Device 24 is connected to receive q axis error electric current Δ iq, the first pi regulator 261 is for q axis error electric current Δ iqIn fundamental current
It carries out tracking and exports the first component of q shaft voltage component u in output endq-pi, the first repetitive controller 262 is for q axis error
Electric current Δ iqIn six harmonics tracked with inhibit ± 1 subharmonic of 6n and output end export q shaft voltage component second
Component uq-rc, the first resonant controller 263 is for q axis error electric current Δ iqIn two harmonics tracked to inhibit three
Subharmonic simultaneously exports q shaft voltage component third component u in output endq-r。
First clipping module 265 respectively with the first pi regulator 261, the first repetitive controller 262, the first resonant controller
263 output end connection, for q shaft voltage the first component of component uq-pi, q shaft voltage component second component uq-rc, q shaft voltage
Component third component uq-rQ shaft voltage the first component of component u after progress amplitude limiting processing after output violent changeq-pi-out, q shaft voltage point
Measure second component uq-rc-out, q shaft voltage component third component uq-r-out。
First adder 264 is connect with the first clipping module 265, for by q shaft voltage the first component of component after clipping
uq-pi-ou, q shaft voltage component second component uq-rc-out, q shaft voltage component third component uq-r-outIt is overlapped to export q axis electricity
Press component uq。
Second pi regulator 271, the second repetitive controller 272, the second resonant controller 273 input terminal and third subtraction
Device 25 is connected to receive d axis error electric current Δ id, the second pi regulator 271 is for d axis error electric current Δ idIn fundamental current
It carries out tracking and exports the first component of q shaft voltage component u in output endd-pi, the second repetitive controller 272 is for mutually missing d axis
Spill current Δ idIn six harmonics tracked to inhibit ± 1 subharmonic of 6n and in output end output d shaft voltage component the
Two component ud-rc, the second resonant controller 273 is for d axis error electric current Δ idIn two harmonics tracked with inhibit
Triple-frequency harmonics simultaneously exports d shaft voltage component third component u in output endd-r。
Second clipping module 275 respectively with the second pi regulator 271, the second repetitive controller 272, the second resonant controller
273 output end connection, for d shaft voltage the first component of component ud-pi, d shaft voltage component second component ud-rc, d shaft voltage
Component third component ud-rD shaft voltage the first component of component u after progress amplitude limiting processing after output violent changed-pi-out, d shaft voltage point
Measure second component ud-rc-out, d shaft voltage component third component ud-r-out。
Second adder 274 is connect with the second clipping module 275, for by d shaft voltage the first component of component after clipping
ud-pi-out, d shaft voltage component second component ud-rc-out, d shaft voltage component third component ud-r-outIt is overlapped to export d axis electricity
Press component ud。
Second coordinate transferring 28 is connect with first adder 264 and second adder 274 respectively, for adding to first
The q shaft voltage component u that musical instruments used in a Buddhist or Taoist mass 264 exportsqThe d shaft voltage component u exported with second adder 274dIt is coordinately transformed to obtain three
First phase control amount Ua, the second phase control amount Ub and third phase control amount Uc in phase rest frame.Wherein, the second coordinate is converted
The coordinate of module 30 is transformed to Parker (iPARK) and Clarke (iCLARKE) inverse transformation.
Space vector modulation module 29 is connect with the second coordinate transferring 28, for receiving the second coordinate transferring 28
Output the first phase control amount Ua, the second phase control amount Ub, third phase control amount Uc and carry out space vector modulation output space
Vector signal ta、tbAnd tcAnd it is transmitted to PWM rectifier 310.
Phaselocked loop 30 connects with PWM rectifier 310, space vector modulation module 29 and the first coordinate transferring 21 respectively
It connects, for the three-phase voltage u obtained from PWM rectifier 3101、u2And u3Phase locking operation is carried out with to space vector modulation module
31 and first coordinate transferring 21 provide phase information θ.
In the present embodiment, the repetitive controller in the first repetitive controller 262, the second repetitive controller 272 and Fig. 1
112 is similar, and the first resonant controller 263, the second resonant controller 273 are similar with the resonant controller 113 in Fig. 1, the first limit
Width module 265, the second clipping module 275 are similar with the clipping module 13 in Fig. 2, and for the sake of brief, details are not described herein.
Figure 11 is the structural schematic diagram of the inhibition system of the PWM rectifier harmonic wave of fourth embodiment of the invention.Such as Figure 11 institute
Show, inhibition system 400 and the difference of inhibition system 300 are:
First repetitive controller 262 is connect to receive q shaft voltage component first and divide with the output end of the first pi regulator 261
Measure uq-pi, the first repetitive controller 262 is for q shaft voltage the first component of component uq-piIn six harmonics tracked with
Inhibit ± 1 subharmonic of 6n and exports q shaft voltage component second component u in output endq-rc。
Second repetitive controller 272 is connect to receive d shaft voltage component first and divide with the output end of the second pi regulator 271
Measure ud-pi, the second repetitive controller 272 be used for d shaft voltage the first component of component ud-piIn six harmonics tracked with
Inhibit ± 1 subharmonic of 6n and exports d shaft voltage component second component u in output endd-rc。
The beneficial effect of the application is: the inhibition system of PWM rectifier harmonic wave of the invention passes through except pi regulator
Repetitive controller and resonant controller are set, wherein repetitive controller be used to track six harmonics in electric current with
Inhibiting ± 1 subharmonic of 6n, resonant controller is used to track to inhibit triple-frequency harmonics two harmonics in electric current, thus
It can inhibit 5,7 subharmonic and 3 subharmonic as caused by unbalanced power supply as caused by network voltage and dead time effect simultaneously,
Meet every harmonic wave index request of the IEEE519-92 about networking electric current.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of inhibition system of PWM rectifier harmonic wave, which is characterized in that the system comprises:
Current regulating module comprising current regulator and adder, for being tracked electric current to obtain output voltage；
The current regulator includes pi regulator, repetitive controller and resonant controller；
The pi regulator, for the first component of output voltage to be tracked and obtained to the fundamental current in the electric current；
The repetitive controller inhibits ± 1 subharmonic of 6n for being tracked to six harmonics in the electric current and obtains
To output voltage second component；
The resonant controller inhibits triple-frequency harmonics for being tracked to two harmonics in the electric current and obtains defeated
Voltage regulation three-component out；
The adder, for by first component of output voltage, the output voltage second component, the output voltage the
Three-component is overlapped to obtain the output voltage.
2. system according to claim 1, which is characterized in that the pi regulator, the repetitive controller and described humorous
The input terminal of vibration controller receives the corresponding error current of the electric current, and the output end of the pi regulator exports the output electricity
Press the first component, the output end of the repetitive controller exports the output voltage second component, the resonant controller it is defeated
Outlet exports the output voltage third component.
3. system according to claim 1, which is characterized in that the input terminal of the pi regulator and the resonant controller
The corresponding error current of the electric current is received, the output end of the pi regulator exports first component of output voltage, described
The output end of resonant controller exports the output voltage third component；The input terminal of the repetitive controller and the PI are controlled
To receive first component of output voltage, the output end of the repetitive controller exports the output electricity for the output end connection of device
Press second component.
4. according to right want 2 or 3 described in system, which is characterized in that the current regulator further comprises clipping module；
The clipping module is connected between the current regulator and the adder, for dividing the output voltage first
It is described defeated after output violent change after amount, the output voltage second component, the output voltage third component progress amplitude limiting processing
One component of voltage regulation, the output voltage second component, the output voltage third component to the adder out.
5. system according to claim 4, which is characterized in that the clipping module is matched including the first clipping unit, first
Set unit, the second clipping unit, the second configuration unit and third clipping unit；
First clipping unit is used for according to the first range value to defeated after first component of output voltage progress amplitude limiting processing
The first component of the output voltage after clipping out；
First configuration unit, for being obtained according to the first component of the output voltage after first range value and clipping
Second range value；
Second clipping unit, for carrying out amplitude limiting processing to the output voltage second component according to second range value
The output voltage second component after output violent change afterwards；
Second configuration unit, for being obtained according to the output voltage second component after second range value and clipping
Third range value；
The third clipping unit, for carrying out amplitude limiting processing to the output voltage third component according to the third range value
The output voltage third component after output violent change afterwards.
6. system according to claim 4, which is characterized in that the electric current includes q shaft current component and d shaft current point
Amount；The error current includes q axis error electric current and d axis error electric current；The voltage includes q shaft voltage component and d shaft voltage
Component；The current regulating module includes the first current regulating module and the second current regulating module；
Wherein, the q axis error electric current exports the q shaft voltage component, the d after first current regulating module adjusting
Axis error electric current exports the d shaft voltage component after second current regulating module adjusting.
7. system according to claim 6, which is characterized in that the system further comprises:
First coordinate transferring, for being coordinately transformed to obtain d-q two to the three-phase current obtained from the PWM rectifier
The q shaft current component and the d shaft current component under phase orthogonal coordinate system；
Second coordinate transferring, for being coordinately transformed to obtain three to the q shaft voltage component and the d shaft voltage component
The first phase control amount, the second phase control amount and third phase control amount in phase rest frame；
Space vector modulation module, it is phased for receiving the first phase control amount, the second phase control amount and the third
Amount processed is simultaneously transmitted to the PWM rectifier after carrying out space vector modulation.
8. system according to claim 7, which is characterized in that the system further comprises the first subtracter, voltage tune
Save device, the second subtracter and third subtracter；
First subtracter is used to given reference voltage carrying out subtraction fortune with the busbar voltage obtained from the PWM rectifier
It is exported after calculation to the input terminal of the voltage regulator, the output end of the voltage regulator exports the first reference current；
Second subtracter is used for the q shaft current point of given reference current and first coordinate transferring output
Amount export after subtraction obtains the q axis error electric current to first current regulating module；
The third subtracter is used for the d axis electricity by first reference current and first coordinate transferring output
Flow component export after subtraction obtains the d axis error electric current to second current regulating module.
9. system according to claim 1, which is characterized in that the repetitive controller include addition unit, interior form unit,
Cycle delay unit, the first compensating unit and the second compensating unit；
Wherein, input terminal of the input terminal of the addition unit as the repetitive controller, the addition unit it is another
Input terminal connects the output end of the interior form unit, the input terminal of the interior form unit output end with the addition unit respectively
It is connected with the input terminal of cycle delay unit, the input of the output end of the cycle delay unit and first compensating unit connects
It connects, the output end of first compensating unit is connect with the input terminal of second compensating unit, second compensating unit
Output end of the output end as the repetitive controller；
Wherein, the interior form unit includes concatenated internal model constant unit and internal model delay cell, the first compensating unit packet
Include concatenated gain coefficient unit and phase lead compensation unit.
10. system according to claim 1, which is characterized in that the transmission function F (s) of the resonant controller are as follows:
Wherein, Kf is the gain coefficient of resonant controller, and wc is the quality factor of resonance control, and ω n is resonance frequency.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849624A (en) * | 2017-01-11 | 2017-06-13 | 华南理工大学 | The removing method and system of a kind of three phase rectifier harmonic wave based on Repetitive controller |
| CN107681883A (en) * | 2017-10-16 | 2018-02-09 | 广东美的暖通设备有限公司 | 3-phase power converter and its control method, device |
| CN107919668A (en) * | 2017-11-06 | 2018-04-17 | 许继电源有限公司 | A kind of Active Power Filter-APF and its control method |
| CN108551169A (en) * | 2018-03-15 | 2018-09-18 | 国网浙江象山县供电有限公司 | Current control method for three level active filters |
-
2018
- 2018-12-24 CN CN201811584223.1A patent/CN109524965A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849624A (en) * | 2017-01-11 | 2017-06-13 | 华南理工大学 | The removing method and system of a kind of three phase rectifier harmonic wave based on Repetitive controller |
| CN107681883A (en) * | 2017-10-16 | 2018-02-09 | 广东美的暖通设备有限公司 | 3-phase power converter and its control method, device |
| CN107919668A (en) * | 2017-11-06 | 2018-04-17 | 许继电源有限公司 | A kind of Active Power Filter-APF and its control method |
| CN108551169A (en) * | 2018-03-15 | 2018-09-18 | 国网浙江象山县供电有限公司 | Current control method for three level active filters |
Non-Patent Citations (2)
| Title |
|---|
| 操丰梅等: "VSC-HVDC 中直流换流器的比例积分-准谐振-重复控制策略", 《电网技术》 * |
| 曹亮等: "重复控制在三相PWM整流器中的应用", 《2017年中国家用电器技术大会论文集》 * |
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