CN107124092A - A kind of electric automobile single phase bidirectional DC/AC converters self-adaptation control method and its device - Google Patents
A kind of electric automobile single phase bidirectional DC/AC converters self-adaptation control method and its device Download PDFInfo
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Classifications
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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
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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
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
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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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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Abstract
The present invention relates to power electronics, Self Adaptive Control and Computer Control Technology field, a kind of electric automobile single phase bidirectional DC/AC converter adaptive controllers are disclosed, it is characterised in that：Including LCL filter circuits, two-way changing circuit, current controlled circuit, voltage x current sample circuit and electric network impedance on-line measurement module, drive circuit, self-adaptive control module, phase-locked loop circuit；Wherein electric network impedance on-line measurement module mainly uses voltage on line side, current information to measure electric network impedance in real time, self-adaptive control module mainly uses electric network impedance information to calculate electric voltage feed forward function in real time, the phase of the bidirectional electric automobile DC/AC converters of dynamic compensation in real time is realized, bidirectional electric automobile DC/AC converters are improved in light current adaptive ability off the net.The present invention can obtain real-time electric network impedance at PCC, and according to the real-time impedance, the Phase margin of the two-way DC/AC converters of dynamic compensation, it is ensured that it does not occur harmonic oscillation.
Description
Technical field
The present invention relates to technical fields such as power electronics, Self Adaptive Control and computer controls, more particularly, to one kind
Electric automobile single phase bidirectional DC/AC converters self-adaptation control method and its device.
Background technology
With extensive renewable distributed energy electric power and electric automobile access power network, the power supply and part throttle characteristics of power network
Significant change is there occurs, the power electronics feature of power system is more and more obvious, and the safe and stable operation to power network is brought
New challenge.Where being difficult to obtain when inverter puts into operation in advance in the design phase of bidirectional electric automobile DC/AC converters
The electric network impedance information of power network, and the influence that forethought is likely to result in other combining inverters, therefore when (special in power network
Low and medium voltage distribution network) between bidirectional electric automobile DC/AC converters and bidirectional electric automobile DC/AC converters, electric automobile
Between two-way DC/AC converters and power network, occur interaction by grid entry point (point of common coupling, PCC) and make
Used time, the harmonic oscillation of bidirectional electric automobile DC/AC converters may be triggered, so as to produce a large amount of harmonic waves, it gently then influences electricity
The quality of power supply of net, the heavy then safe and stable operation of entail dangers to power network.To find out its cause, mainly bidirectional electric automobile DC/AC becomes
The output impedance of parallel operation is mismatched with grid entry point PCC electric network impedance, triggers the harmonic oscillation of DC/AC converters.
In order to solve the harmonic wave that two-way DC/AC grid-connecting apparatus interacts at grid entry point PCC and triggered with electric network impedance
The problem of vibration, existing solution is commonly divided into two classes.One type is by the network at two-way grid-connecting apparatus and PCC
Impedance carries out stability analysis as an entirety to whole system；An other class is that the impedance to two-way grid-connecting apparatus is carried out
Individually modeling, with reference to the electric network impedance information at PCC, the impedance of the two-way grid-connecting apparatus of dynamic compensation or phase margin, to improve
Its stability and and network electric energy quality.But existing apparatus exists following not enough：(1) fail in meter and online electric network impedance, device
Even if using electric voltage feed forward phase compensation function, also just for specific network parameter and circuit structure, so as to cause when dress
When circuits topologies change or electrical network parameter are changed greatly, its electric voltage feed forward phase compensation function will no longer conform to require,
Still harmonic oscillation problem occurs；(2) adaptive equalization device is mostly the reversals only for combining inverter, uncomfortable
For two-way DC/AC converters.
The content of the invention
It is an object of the invention to the above mentioned problem for solving prior art appearance, there is provided a kind of electric automobile single phase bidirectional
DC/AC converters self-adaptation control method and its device, real-time power network at PCC is obtained by vehicle-mounted two-way DC/AC converters
Impedance, and according to the real-time impedance, the Phase margin of the two-way DC/AC converters of dynamic compensation, it is ensured that it does not occur harmonic oscillation.
A kind of electric automobile single phase bidirectional DC/AC converters self-adaptation control method and its device, it is characterised in that：Including
LCL filter circuits, two-way changing circuit, current controlled circuit, voltage x current sample circuit and electric network impedance on-line measurement module,
Drive circuit, self-adaptive control module, phase-locked loop circuit；Wherein electric network impedance on-line measurement module mainly uses net side electricity
Pressure, current information measure electric network impedance in real time, and self-adaptive control module mainly uses electric network impedance information to calculate voltage in real time
Feedforward function, realizes the phase of the bidirectional electric automobile DC/AC converters of dynamic compensation in real time, improves bidirectional electric automobile DC/AC
Converter is in light current adaptive ability off the net.
The method that electric automobile single phase bidirectional DC/AC converter Self Adaptive Controls are realized using said apparatus, basic step
It is as follows：
(1) periodically it is superimposed one by the given input of the current regulator in bidirectional electric automobile DC/AC converters
PRBS disturbs sequence, and to measure electric network impedance, its detailed process is as follows：Step one, in bidirectional electric automobile DC/AC converters electricity
The given value of current input for flowing ring controller is superimposed periodic PRBS disturbing signals.Wherein, the frequency of PRBS disturbing signals is set
It is set to power network fundamental frequency 50Hz, number of bits N and can customize the arbitrary integer between 5-11, can be according to the requirement of measurement accuracy
Voluntarily select；Less than the 10% of the amplitude selection bidirectional electric automobile DC/AC converter output-current ratings of PRBS disturbing signals；
Step 2, the cycle that bidirectional electric automobile DC/AC converter currents give input superposition PRBS disturbing signals is 0.1s,
That is the present apparatus is grid-connected and carry out electric network impedance measurement process, and the duration for having 0.1s carries out PRBS disturbing signal injections, connect
The duration for 0.1s stops the injection of PRBS disturbing signals so that bidirectional electric automobile DC/AC converters can be in periodically to be contained
Disturbance and undisturbed two states；
Step 3, samples in output voltage and output current containing PCC points when disturbing with undisturbed, and carry out direct computation of DFT respectively
Leaf analysis obtain the frequency domain sequence of voltage and current, and vector difference computing is carried out to frequency domain sequence, obtain the PRBS under each frequency
Excitation disturbanceWithUtilizeTry to achieve the electric network impedance under the period each frequency
Value；Step 4, the device plug-in carries out step 2 and step 3 cycle, and the power network that measurement is obtained constantly is updated in real time
Impedance frequency characteristic, completes the on-line identification of electric network impedance.
(2) the small signal impedance model Z of bidirectional electric automobile DC/AC converters is set up using harmonic linearization methodk, so
Afterwards according to the electric network impedance Z measured in real timegCalculate Zg/ZkCut-off frequency and corresponding phase margin at=1, if phase margin
Meet and require (45 ° -60 °), then need not carry out phase angle compensation operation；Otherwise according to minimum phase compensation principle, needs are calculated
The size at the phase angle of compensation.
(3) size and cut-off frequency at the required compensation phase angle obtained according to calculating, design voltage feedforward compensation function,
To realize phase of the adaptive dynamic compensation bidirectional electric automobile DC/AC transformer impedance models at cut-off frequency.
(4) the current on line side i of bidirectional electric automobile DC/AC converters is gatheredgWith grid entry point PCC voltages u0, current on line side ig
With given electric current i after phaselocked looprefSubtract each other, then by control ring Gi(s) signal u is obtained afteric, signal uicAgain with it is grid-connected
Mouth voltage u0By electric voltage feed forward parameter Kf(s) the voltage signal u formed afterfMutually add and subtract, the carrier wave letter obtained after mutually adding and subtracting
Number e, carrier signal e obtains the SPWM switching signals of two-way changing bridge with triangle wave again, so that closed-loop control is formed, dynamic
Compensate the phase margin of bidirectional electric automobile DC/AC converter current control rings.
Proposed by the invention has the relatively simple spy of calculating process based on adaptive voltage feedforward parameter computational methods
The reversals and switching process of two-way grid-connecting apparatus effectively and are also contemplated the stable to converter of phaselocked loop by point
The influence of property.
Wherein, the calculation method of parameters for the feedforward compensation function being previously mentioned in step (2) is as follows：
According to lead compensation principle, it is first assumed that phase compensation function is：
Then the phase frequency function of penalty function is:
WhenWhen, frequencies omega during maximum phase compensation can be obtainedm
Then maximum phase compensation angle is：
Then made to not change the impedance magnitude at maximum phase compensation point | Gc(ωm) |=1, then can obtain k is：
Using harmonic linearization method, reversals output impedance and switching process input impedance derivation are：
Reversals：
Switching process：
It can show that impedance model of the bidirectional electric automobile DC/AC converters containing phaselocked loop is according to (6), (7), (8), (9)：
Further derive and can obtain, the impedance model that bidirectional electric automobile DC/AC converters are added after electric voltage feed forward is：
H in formula (11)vValue determine that bidirectional electric automobile DC/AC converters are operated in inverter mode or rectification shape
State, if Hv＞ 0 is then operated in rectification state, Hv＜ 0 is operated in inverter mode.
It is assumed that：
It is equal to the product of the impedance model added before electric voltage feed forward and penalty function according to the impedance model added after electric voltage feed forward,
Electric voltage feed forward function K can be obtainedf(s) it is：
By further arranging available (13)
Bidirectional electric automobile DC/AC converter voltage feedforward functions can be just calculated using formula (3) (4), (5), (13).
Beneficial effects of the present invention：
(1) electric voltage feed forward phase compensation function is set according to specified conditions in existing apparatus, when device circuit topology is tied
When structure changes, its electric voltage feed forward phase compensation function will no longer conform to require, device does not have generality；And the present invention is more detailed
Thin describes electric voltage feed forward phase compensation function derivation in device, can when device circuit structure changes, according to
The relatively simple derivation method of the present invention derives electric voltage feed forward phase compensation function again, therefore the present invention is relative to existing apparatus
With more applicability and practicality.
(2) the vehicle-mounted converter of existing electric automobile does not account for influence of the electric network impedance to its stability, without online electricity
The function of net impedance measurement, and the present invention utilizes the software and hardware resources on-line measurement grid entry point PCC of the vehicle-mounted converter of electric automobile
The electric network impedance at place, and current loop control parameter is dynamically adjusted according to the change of electrical network parameter, adapt to the change of power network, it is to avoid go out
Existing harmonic oscillation.
(3) prior art is compared to, the present invention considers phaselocked loop DC/AC converter stabilities two-way to electronic vapour
Influence, obtained impedance model is more accurate.
(4) modeling of existing combining inverter and stability analysis technology are directed to the combining inverter of electric automobile and double
To DC/AC converters, electric circuit characteristic that is of the invention then being directed to the two-way DC/AC converters of single-phase electric vapour sets up the resistance of its small-signal
Anti- model, and switching process and the stabilization of reversals are ensured simultaneously.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is phase-compensatory contro strategy implement block diagram of the present embodiment reversals based on electric voltage feed forward；
Fig. 2 is phase-compensatory contro strategy implement block diagram of the present embodiment switching process based on electric voltage feed forward；
Fig. 3 is that the present embodiment bidirectional electric automobile AC/DC converters constitute structured flowchart；
Fig. 4 is the present embodiment bidirectional electric automobile DC/AC converter reversals control flow charts；
Fig. 5 is the present embodiment bidirectional electric automobile DC/AC converter switching process control flow charts；
Fig. 6 is the present embodiment bidirectional electric automobile DC/AC convertor device adaptive process figures；
Fig. 7 is the present embodiment reversals output impedance and electric network impedance Bode diagram；
Fig. 8 is the input impedance of the present embodiment switching process and electric network impedance Bode diagram；
Fig. 9 is the present embodiment reversals output voltage curent change figure；Wherein, figure (a) is the output electricity for being not powered on pressure feedforward
Current voltage variation diagram, figure (b) is the output voltage curent change figure for adding electric voltage feed forward；
Figure 10 is the present embodiment switching process input voltage and input current variation diagram；Wherein, figure (a) is the output electricity for being not powered on pressure feedforward
Current voltage variation diagram, figure (b) is the output voltage curent change figure for adding electric voltage feed forward.
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Fig. 1, Fig. 2 are respectively bidirectional electric automobile DC/AC converters reversals and switching process based on electric voltage feed forward
Phase-compensatory contro strategy implement block diagram, its median filter is by inductance L1、L2, electric capacity CfWith damping resistance RdConstitute, power network is by managing
The AC power u thoughtg, inductance LgWith resistance RgSeries equivalent, Gi(s) it is current controlled circuit transmission function, GinFor PWM
Input voltage to the transmission function of translation circuit output voltage, iLTo flow through L1Electric current, iCTo flow through the electricity of filter capacitor
Stream, igFor grid-connected current, irefTo give (reference) electric current, UinFor batteries of electric automobile voltage, UnFor the output electricity of translation circuit
Pressure.Its specific work process is：First with PRBS Sequence is superimposed at given value of current, electric network impedance is measured in real time；Then count
Calculate Zg/ZkCut-off frequency, phase margin, and thus draw need to be at cut-off frequency to bidirectional electric automobile DC/AC converters
Impedance-compensated phase size, it is last to calculate electric voltage feed forward function according to formula (3) (4), (5), (13), with current loop control
Signal averaging generates the control signal of SPWM modules together, the final phase realized to bidirectional electric automobile DC/AC converters
Compensation, improves its adaptive ability when electric network impedance increases.
Fig. 3 is bidirectional electric automobile DC/AC converter system for implementing hardware block diagrams, including LCL filter circuits, two-way changing
Circuit, current controlled circuit, voltage x current sample circuit and electric network impedance on-line measurement module, drive circuit, Self Adaptive Control
Module, phase-locked loop circuit；Wherein electric network impedance on-line measurement module mainly uses voltage on line side, current information to measure electricity in real time
Net impedance, self-adaptive control module mainly uses electric network impedance information to calculate electric voltage feed forward function in real time, realizes dynamic in real time
The phase of bidirectional electric automobile DC/AC converters is compensated, bidirectional electric automobile DC/AC converters are improved in off the net adaptive of light current
Should be able to power.
Fig. 4, Fig. 5 are respectively bidirectional electric automobile DC/AC converters switching process and reversals control block diagram, the application
A kind of electric automobile single phase bidirectional DC/AC converters self-adaptation control method and its device based on online electric network impedance, are used
Be will and network interface voltage by feedforward link Kf(s) it is added to the output of electric current loop.
To realize that electric voltage feed forward is adaptive, feedforward function design process is as follows：
According to lead compensation principle, it is first assumed that phase compensation function is：
Then the phase frequency function of penalty function is:
WhenWhen, frequencies omega during maximum phase compensation can be obtainedm
Then maximum phase compensation angle is：
Then made to not change the impedance magnitude at maximum phase compensation | Gc(ωm) |=1, then can obtain k is：
According to Fig. 5, Fig. 6, the impedance that can obtain bidirectional electric automobile DC/AC converters after addition voltage feedforward control strategy is:
H in formula (19)vValue determine that bidirectional electric automobile DC/AC converters are operated in inverter mode or rectification shape
State.
It is assumed that：
It is equal to the product of the impedance model added before electric voltage feed forward and penalty function according to the impedance model added after electric voltage feed forward,
Electric voltage feed forward function K can be obtainedf(s) it is：
Formula (16) is can obtain by further arranging
Bidirectional electric automobile DC/AC converter voltages feedforward benefit can be just calculated using formula (16), (17), (18), (21)
Repay function.
Fig. 6 is specific implementation process flow chart, is periodically superimposed by the given input in current regulator first
PRBS Sequence disturbance is added, in real time measurement electric network impedance information, then calculate electric network impedance and converted with bidirectional electric automobile DC/AC
The cut-off frequency and phase margin of device impedanoe ratio, judge whether to meet stability requirement, if being unsatisfactory for requiring, needed for calculating
Compensate the size of phase；Size further according to required compensation phase margin calculates electric voltage feed forward compensating parameter, ultimately generates
SPWM signals, to realize stability control.
Fig. 7, Fig. 8 compensate front and rear electric network impedance and bidirectional electric automobile DC/AC reversals and whole to add electric voltage feed forward
The impedance curve of stream process.Wherein, ZOThe output impedance of reversals, Z ' when representing not adding electric voltage feed forward compensationORepresent to add
The output impedance of reversals, wherein Z ' during electric voltage feed forwardinv、Z′inv-kIt is whole when representing not add and add electric voltage feed forward compensation
Stream process input impedance, ZgRepresent electric network impedance, as can be seen from the figure add electric voltage feed forward than do not add electric voltage feed forward
Zg/Z′O=1 and Zg/Z′inv-kPhase margin improves 30 ° at=1, but it is in Zg/ZO=1 and Zg/Z′inv-kAmplitude base at=1
This is constant, and stability is greatly improved.
Fig. 9 (a) is, when electric network impedance is 5mH, due to influencing each other between electric network impedance and reversals, to cause electricity
The two-way DC/AC converters reversals output voltage electric current of electrical automobile is unstable, after Fig. 9 (b) is addition adaptive voltage feedforward,
Reversals output impedance phase margin improves 30 °, it is suppressed that influence of the electric network impedance to reversals, improves stabilization
Property.Figure 10 (a) is, when electric network impedance is 5mH, due to its influencing each other between switching process, to cause bidirectional electric automobile
DC/AC converter switching process input voltage and input currents are unstable, and Figure 10 (b) is adds after adaptive voltage feedforward, switching process
Input impedance phase nargin improves 30 °, it is suppressed that influence of the electric network impedance to switching process, improves stability.
Although being described in conjunction with the accompanying embodiments of the present invention, patent owner can be in appended claims
Within the scope of make various deformations or amendments, as long as no more than the present invention claim described by protection domain, all should
Within protection scope of the present invention.
Claims (2)
1. a kind of electric automobile single phase bidirectional DC/AC converter adaptive controllers, it is characterised in that：Including LCL filtered electricals
Road, two-way changing circuit, current controlled circuit, voltage x current sample circuit and electric network impedance on-line measurement module, drive circuit,
Self-adaptive control module, phase-locked loop circuit；Wherein electric network impedance on-line measurement module mainly uses voltage on line side, current information
Electric network impedance is measured in real time, and self-adaptive control module mainly uses electric network impedance information to calculate electric voltage feed forward function in real time, it is real
The phase of bidirectional electric automobile DC/AC converters is dynamically compensated when real, bidirectional electric automobile DC/AC converters are improved in light current
Adaptive ability off the net.
2. usage right requires the method that 1 described device realizes electric automobile single phase bidirectional DC/AC converter Self Adaptive Controls, base
This step is as follows：
(1) periodically it is superimposed one by the given input of the current regulator in bidirectional electric automobile DC/AC converters
PRBS disturbs sequence, and to measure electric network impedance, its detailed process is as follows：
Step one, it is periodic in the given value of current input superposition of bidirectional electric automobile DC/AC converter current ring controllers
PRBS disturbing signals；Wherein, the frequency setting of PRBS disturbing signals is power network fundamental frequency 50Hz, and number of bits N can customize in 5-
Arbitrary integer between 11, can voluntarily be selected according to the requirement of measurement accuracy；The amplitude of PRBS disturbing signals selects electronic vapour
Less than the 10% of the two-way DC/AC converters output-current rating of car；
Step 2, the cycle that bidirectional electric automobile DC/AC converter currents give input superposition PRBS disturbing signals is 0.1s,
That is the present apparatus is grid-connected and carry out electric network impedance measurement process, and the duration for having 0.1s carries out PRBS disturbing signal injections, connect
The duration for 0.1s stops the injection of PRBS disturbing signals so that bidirectional electric automobile DC/AC converters can be in periodically to be contained
Disturbance and undisturbed two states；
Step 3, samples in output voltage and output current containing PCC points when disturbing with undisturbed, and carry out direct computation of DFT respectively
Leaf analysis obtain the frequency domain sequence of voltage and current, and vector difference computing is carried out to frequency domain sequence, obtain the PRBS under each frequency
Excitation disturbanceWithUtilizeTry to achieve the electric network impedance under the period each frequency
Value；Step 4, the device plug-in carries out step 2 and step 3 cycle, and the power network that measurement is obtained constantly is updated in real time
Impedance frequency characteristic, completes the on-line identification of electric network impedance；
(2) the small signal impedance model Z of bidirectional electric automobile DC/AC converters is set up using harmonic linearization methodk, Ran Hougen
The electric network impedance Z measured when factuallygCalculate Zg/ZkCut-off frequency and corresponding phase margin at=1, if phase margin is met
It is required that (45 ° -60 °), then need not carry out phase angle compensation operation；Otherwise according to minimum phase compensation principle, calculating needs compensation
Phase angle size.
(3) size and cut-off frequency at the required compensation phase angle obtained according to calculating, design voltage feedforward compensation function, with reality
Now adaptive dynamic compensates phase of the bidirectional electric automobile DC/AC transformer impedance models at cut-off frequency；
(4) the current on line side i of bidirectional electric automobile DC/AC converters is gatheredgWith grid entry point PCC voltages u0, current on line side igBy
With given electric current i after phaselocked looprefSubtract each other, then by control ring Gi(s) signal u is obtained afteric, signal uicAgain with simultaneously network interface electricity
Press u0By electric voltage feed forward parameter Kf(s) the voltage signal u formed afterfMutually add and subtract, the carrier signal e obtained after mutually adding and subtracting,
Carrier signal e obtains the SPWM switching signals of two-way changing bridge with triangle wave again, so that closed-loop control is formed, dynamic compensation
The phase margin of bidirectional electric automobile DC/AC converter current control rings.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612449A (en) * | 2017-09-06 | 2018-01-19 | 西南交通大学 | Metro traction current transformer DC side oscillation suppression method based on front feedback voltage compensation |
| CN111399381A (en) * | 2020-03-30 | 2020-07-10 | 南京航空航天大学 | Method and system for shaping output impedance of converter |
| CN113507122A (en) * | 2021-06-28 | 2021-10-15 | 深圳市禾望电气股份有限公司 | Resonance suppression method, module and device for converter |
| CN113671257A (en) * | 2021-08-12 | 2021-11-19 | 合肥工业大学 | Impedance measurement method for switching disturbance mode |
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| CN107612449B (en) * | 2017-09-06 | 2020-03-20 | 西南交通大学 | Subway traction converter direct current side oscillation suppression method based on feedforward voltage compensation |
| CN111399381A (en) * | 2020-03-30 | 2020-07-10 | 南京航空航天大学 | Method and system for shaping output impedance of converter |
| CN111399381B (en) * | 2020-03-30 | 2021-05-14 | 南京航空航天大学 | Method and system for shaping output impedance of converter |
| CN113507122A (en) * | 2021-06-28 | 2021-10-15 | 深圳市禾望电气股份有限公司 | Resonance suppression method, module and device for converter |
| CN113671257A (en) * | 2021-08-12 | 2021-11-19 | 合肥工业大学 | Impedance measurement method for switching disturbance mode |
| CN113671257B (en) * | 2021-08-12 | 2022-10-04 | 合肥工业大学 | Impedance measurement method for switching disturbance mode |
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