CN107196535B - A kind of inverter series connection synchronisation control means based on adaptive notch filter - Google Patents
A kind of inverter series connection synchronisation control means based on adaptive notch filter Download PDFInfo
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- CN107196535B CN107196535B CN201710596458.1A CN201710596458A CN107196535B CN 107196535 B CN107196535 B CN 107196535B CN 201710596458 A CN201710596458 A CN 201710596458A CN 107196535 B CN107196535 B CN 107196535B
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- auxiliary power
- voltage
- notch filter
- frequency
- adaptive notch
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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
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention discloses a kind of inverter series connection synchronisation control means based on adaptive notch filter, comprising: main power source is autonomously generated output voltage phase and frequency, and auxiliary power obtains main power source phase angle θ using adaptive notch filter module in real time1And angular frequency1, obtain the unit amplitude sinusoidal signal u with main power voltage with frequency with phaser；By auxiliary power output voltage given value U2Multiplied by urAfterwards, with auxiliary power actual output voltage uo2It is poor to make, and obtains difference △ ue2, and pass through the improved PI controller of auxiliary power voltage control module, obtain auxiliary power voltage modulation signal ut2；Auxiliary power SPWM module is according to auxiliary power voltage modulation signal ut2Corresponding switch control signal is obtained, control inverter switching tube turns on and off.It is verified by simulation software, the above method can be realized series resonant inverter line lock stable operation, and static error is small.Compared to existing control method, control structure is simple, and output voltage waveforms quality is high.
Description
Technical field
The invention belongs to field of power electronics, and in particular to a kind of inverter series connection synchronization based on adaptive notch filter
Control method.
Background technique
With the rapid development of inverter and the power supply requirement of high-power, the series and parallel of various inverters
Combination is widely applied, wherein it is in the majority with parallel connection application, but needing the special applications such as high voltage output, wide range output
Occasion, tandem working mode have advantage.In inverter series operation, needs to keep the synchronization between power supply, stablizes fortune
Row just can guarantee the power quality of integrated drive generator, this just needs each inverter to have the function of real-time synchronization and output voltage control
Function processed.
Synchronization control algorithm is the basis of inverter series control, dynamic and static properties, influences integrated drive generator
Power quality.Currently, common synchronization control algorithm mainly has: zero crossing detection, multiplication phase discriminator method, second-order integrator
Method, the Synchronos method based on Fourier transformation, Synchronos method based on wavelet transformation etc..But the above method have the shortcomings that it is respective
And influence power quality when inverter series operation.Such as: zero crossing detection is to noise-sensitive and dynamic responding speed
Slowly；There are low-pass filtering time delays for multiplication phase discriminator method, cause dynamic responding speed slow；Second-order integrator method frequency be it is fixed,
In frequency fluctuation, there are errors；Synchronos method based on Fourier transformation, the Synchronos method computation burden based on wavelet transformation are larger,
It is more difficult to be realized in general numerical control chip.And in terms of inverter controller, there are the more control algolithm controllably selected, such as PI
Control, PR control, PREDICTIVE CONTROL etc., above-mentioned algorithm needs to balance between dynamic responding speed and lasting accuracy.When any string
When the inverter of connection can not be accomplished to synchronize or cannot achieve preferable output waveform, the power quality of entire integrated drive generator all can be by
To influence.
Therefore, it is electric to power supply output is improved to study a kind of synchronization control algorithm for being able to achieve inverter series connection stable operation
Energy quality is extremely important.
Summary of the invention
The inverter that the present invention provides a kind of based on adaptive notch filter is connected synchronisation control means, existing to solve
Series resonant inverter line lock operation stability it is poor, the big problem of integrated drive generator voltage steady-state error.
A kind of inverter series connection synchronisation control means based on adaptive notch filter, comprising:
Series-connection power supplies are made of main power source and auxiliary power, and the main power source is autonomously generated output voltage phase and frequency, secondary
Power supply is using adaptive notch filter module according to main power source output voltage u1Main power source phase angle θ is obtained in real time1And angular frequency1,
Obtain the unit amplitude sinusoidal signal u with main power voltage with frequency with phaser；
By auxiliary power output voltage given value U2Multiplied by urAfterwards, with auxiliary power actual output voltage uo2It is poor to make, by what is obtained
Difference △ ue2It is sent into auxiliary power voltage control module, obtains auxiliary power voltage modulation signal ut2；
Auxiliary power voltage control module uses improved PI controller, inputs as error signal △ ue2, export as voltage tune
Signal u processedt2；
Auxiliary power SPWM module is according to auxiliary power voltage modulation signal ut2Corresponding switch control signal is obtained, inversion is controlled
Power supply switch tube turns on and off.
Preferably, the inverter series connection synchronisation control means above-mentioned based on adaptive notch filter, auxiliary power use certainly
The method for adapting to trapper obtains main power source output voltage phase and frequency in real time, obtains the list with main power voltage with frequency with phase
Position amplitude sinusoidal signal ur.Adaptive notch filter uses the kinetics equation of following form:
Wherein y is input signal, and x is the status signal of adaptive notch filter, and θ is the working frequency of adaptive notch filter,
γ is the parameter for controlling adaptive notch filter frequency adaptive speed, and ζ is the parameter for controlling adaptive notch filter bandwidth, γ and ζ
All take positive number.Kinetics equation shown in formula (1) has following running track when reaching stable state:
At this point, with main power voltage with frequency with the unit amplitude sinusoidal signal u of phaserIt is directly calculated by following formula:
Parameter in formula (3)It is directly observed and being obtained by the track variable in formula (2).
Preferably, the inverter series connection synchronisation control means above-mentioned based on adaptive notch filter, auxiliary power voltage control
Molding block uses improved PI controller, increases quasi resonant control, auxiliary power voltage control on the basis of conventional PI control device
Fundamental voltage is adjusted by PI controller in molding block, and harmonic voltage is inhibited by several quasi resonant controls in parallel, improved
The transmission function of PI controller are as follows:
Wherein, KP、KI、KI、ωcThe ratio and integral coefficient of respectively improved PI controller, ω0For shown in formula (2) from
Adapt to the main power source output voltage frequency of trapper estimation.
Compared to existing control method, control structure provided by the invention is simple, is verified by simulation software, the above method
It can be realized series resonant inverter line lock stable operation, static error is small, and output voltage waveforms quality is high.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the inverter series connection synchronisation control means institute application scenarios provided by the invention based on adaptive notch filter
Hardware annexation figure；
Fig. 2 is the controller chassis of the inverter series connection synchronisation control means provided by the invention based on adaptive notch filter
Figure；
Fig. 3 is the series resonant inverter power supply of the synchronisation control means operation using provided by the invention based on adaptive notch filter
Simulation waveform.
Specific embodiment
Referring to FIG. 1, the inverter series connection synchronisation control means provided by the invention based on adaptive notch filter is answered
It mainly include that main power source and auxiliary power two parts, the two connect to form integrated drive generator with the hardware annexation figure of scene.Its
In: main power source and auxiliary power are all made of single-phase full bridge inversion topological structure, and main power source is autonomously generated output voltage phase and frequency,
Auxiliary power uses adaptive notch filter module tracks main power source output voltage phase and frequency.Control for hardware in Fig. 1
Journey, referring to FIG. 2, Fig. 2 is the control of the inverter series connection synchronisation control means provided by the invention based on adaptive notch filter
Block diagram processed, as shown in Fig. 2, first with adaptive notch filter to main power source output voltage u1Adaptive-filtering is carried out, master is obtained
The phase angle θ of power supply1And angular frequency1, obtain the unit amplitude sinusoidal signal u with main power voltage with frequency with phaser。
Adaptive notch filter uses the kinetics equation of following form:
Wherein y is input signal, and x is the status signal of adaptive notch filter, and θ is the working frequency of adaptive notch filter,
γ is the parameter for controlling adaptive notch filter frequency adaptive speed, and ζ is the parameter for controlling adaptive notch filter bandwidth, γ and ζ
All take positive number.Kinetics equation shown in formula (1) has following running track when reaching stable state:
At this point, with main power voltage with frequency with the unit amplitude sinusoidal signal u of phaserIt is directly calculated by following formula:
Parameter in formula (3)It is directly observed and being obtained by the track variable in formula (2).
The voltage of auxiliary power is given into amplitude U2Multiplied by urAuxiliary power reference voltage instantaneous value is obtained, then cuts and adopts in real time
The auxiliary power actual output voltage u of collectiono2Obtain error signal △ ue2By error signal △ ue2Estimate with adaptive notch filter module
The main power source output voltage frequency ω of survey0Incoming auxiliary power voltage control module, the module use improved PI controller, pass
Shown in delivery function such as formula (4), output voltage modulated signal u is obtainedt2Driving instruction, control are generated by conventional SPWM modulator approach
Inverter switching tube processed turns on and off.
Auxiliary power voltage control module uses improved PI controller, increases quasi-resonance on the basis of conventional PI control device
Controller, fundamental voltage is adjusted by PI controller in auxiliary power voltage control module, and harmonic voltage is humorous by several standards in parallel
The controller that shakes inhibits, the transmission function of improved PI controller are as follows:
Wherein, KP、KI、KI、ωcThe ratio and integral coefficient of respectively improved PI controller, ω0For shown in formula (2) from
Adapt to the main power source output voltage frequency of trapper estimation.
Fig. 3 is using special power source simulation software Saber, to the series resonant inverter electricity run using control method of the invention
The result figure of source simulation waveform progress simulating, verifying.Wherein, (a) is main electric power output voltage waveform；It (b) is auxiliary power with adaptive
The main power voltage phase for answering trapper module to estimate, the output voltage waveforms after (c) connecting for main power source with auxiliary power.It can
See, the phase of Fig. 3 (b) estimation and the result of Fig. 3 (a) are almost the same；Series connection synchronously control side of the invention is used in Fig. 3 (c)
After method, output voltage is sinusoidal waveform, and THD (total harmonic distortion) is 1% or so, and voltage magnitude is stablized, and fluctuating range is
2%, illustrate preferably to realize series resonant inverter line lock stable operation, static error is small.Compared to conventional control methods, originally
Invention control structure is simple, and output voltage waveforms quality is high, has certain application prospect.
The above is only a specific embodiment of the invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (1)
- The synchronisation control means 1. a kind of inverter based on adaptive notch filter is connected characterized by comprisingInverter includes main power source and auxiliary power, and series-connection power supplies are made of main power source and auxiliary power, and the main power source is independently given birth to At output voltage phase and frequency, auxiliary power is using adaptive notch filter module according to main power source output voltage u1Master is obtained in real time Power phase angle θ1And angular frequency1, obtain the unit amplitude sinusoidal signal u with main power voltage with frequency with phaser；Adaptive notch filter uses the kinetics equation of following form:Wherein y is input signal, and x is the status signal of adaptive notch filter, and θ is the working frequency of adaptive notch filter, and γ is The parameter of adaptive notch filter frequency adaptive speed is controlled, ζ is the parameter for controlling adaptive notch filter bandwidth, and γ and ζ take Positive number, kinetics equation shown in formula (1) have following running track when reaching stable state:At this point, with main power voltage with frequency with the unit amplitude sinusoidal signal u of phaserIt is directly calculated by following formula:Parameter in formula (3)It is directly observed and being obtained by the track variable in formula (2)；By auxiliary power output voltage given value U2Multiplied by urAfterwards, with auxiliary power actual output voltage uo2Make poor, the difference DELTA that will be obtained ue2It is sent into auxiliary power voltage control module, obtains auxiliary power voltage modulation signal ut2；Auxiliary power voltage control module uses improved PI controller, inputs as error signal Δ ue2, export as voltage modulated letter Number ut2；Auxiliary power voltage control module uses improved PI controller, increases quasi-resonance control on the basis of conventional PI control device Device, fundamental voltage is adjusted by PI controller in auxiliary power voltage control module, and harmonic voltage is by several quasi-resonance controls in parallel Device processed inhibits, the transmission function of improved PI controller are as follows:Wherein, KP、KI、KR 、ωcThe ratio and integral coefficient of respectively improved PI controller, ω0It is adaptive shown in formula (2) The main power source output voltage frequency of trapper estimation；Auxiliary power SPWM module is according to auxiliary power voltage modulation signal ut2Corresponding switch control signal is obtained, inverter is controlled Switching tube turns on and off.
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| CN113098015B (en) * | 2021-04-20 | 2022-08-30 | 中国铁道科学研究院集团有限公司 | Method and device for suppressing low-order harmonic of network side current of single-phase rectifier |
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| CN1964173A (en) * | 2005-11-08 | 2007-05-16 | 台达电子工业股份有限公司 | An adaptive synchronous commutating control circuit and method |
| CN102832922A (en) * | 2012-04-25 | 2012-12-19 | 中国科学院等离子体物理研究所 | High-precise and high-synchronous novel analog signal distributor |
| CN103956952A (en) * | 2013-04-17 | 2014-07-30 | 济南田中工贸有限公司 | Vector frequency conversion controller of synchronization frequency conversion type alternating current motor |
| CN105794069A (en) * | 2013-10-02 | 2016-07-20 | 通用电气技术有限公司 | Voltage source converter |
| CN205753439U (en) * | 2016-01-22 | 2016-11-30 | 国家电网公司 | A kind of many level photovoltaic inverter without alterating and direct current flow sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9263971B2 (en) * | 2011-12-16 | 2016-02-16 | Empower Micro Systems Inc. | Distributed voltage source inverters |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964173A (en) * | 2005-11-08 | 2007-05-16 | 台达电子工业股份有限公司 | An adaptive synchronous commutating control circuit and method |
| CN102832922A (en) * | 2012-04-25 | 2012-12-19 | 中国科学院等离子体物理研究所 | High-precise and high-synchronous novel analog signal distributor |
| CN103956952A (en) * | 2013-04-17 | 2014-07-30 | 济南田中工贸有限公司 | Vector frequency conversion controller of synchronization frequency conversion type alternating current motor |
| CN105794069A (en) * | 2013-10-02 | 2016-07-20 | 通用电气技术有限公司 | Voltage source converter |
| CN205753439U (en) * | 2016-01-22 | 2016-11-30 | 国家电网公司 | A kind of many level photovoltaic inverter without alterating and direct current flow sensor |
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