CN107579673A - A kind of Three phase four-leg inverter and its control method - Google Patents
A kind of Three phase four-leg inverter and its control method Download PDFInfo
- Publication number
- CN107579673A CN107579673A CN201710718568.0A CN201710718568A CN107579673A CN 107579673 A CN107579673 A CN 107579673A CN 201710718568 A CN201710718568 A CN 201710718568A CN 107579673 A CN107579673 A CN 107579673A
- Authority
- CN
- China
- Prior art keywords
- phase
- voltage
- mrow
- control
- msub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of three-phase four-leg inverter and its control method, trapper is replaced by using active damping control, using the monocyclic control of voltage, it disclosure satisfy that demand for control, and the volume and weight of power-supply system can be mitigated, reference voltage feedforward control is added, further increases the dynamic property of power-supply system.The present invention helps solve the problems, such as space three-phase four-leg inverter control strategy, to simplify control strategy for inverter, mitigates system bulk and weight, and providing necessary condition for multiple inverter parallels supports.
Description
Technical field
The present invention relates to the control field of secondary power supply in space field, and in particular to a kind of Three phase four bridge legs inversion
The main topological circuit and its control method of device.
Background technology
Space exploration is the Disciplinary Frontiers of world today's development in science and technology, have it is very strong basic, perspective, innovative and
Drive property.Mankind's solar-system operation generally can be divided into three big field of earth applied satellite, manned space flight and survey of deep space, carry out space
Activity, it is the inevitable choice of space technology development.At present, synthetic aperture radar (synthetie Aperture Radar, SAR)
Satellite uses the distribution system of dc bus, and its TR components need substantial amounts of secondary power supply, with spatial overlay technology
Constantly development, or even can up to as many as thousands of, will so very more secondary power supplies be needed, and the efficiency of secondary power supply is all
It is very low, typically only 70%~80% or so, so as to considerably increase the burden of satellite power system, to volume, weight and work(
Consumption all has a significant impact.
Power-supply system ac bus technology turns into effective solution, and each user can be adapted to by transformer
Oneself uses voltage, and the conversion efficiency of AC transformer is higher, can by the way of ac bus typically 96%~98%
To greatly improve the transmission efficiency of the energy.
In space field, both needed to power for single-phase load, it is also desirable to power, also have many non-thread for unbalanced load
Property load, but the three-phase equilibrium of three-phase inverter output is must also be ensured that while power, ensures total harmonic wave of output voltage
Distortion (total harmonic distribution, THD) meets certain requirements, therefore is using three-phase four-leg inverter
Proper selection, four bridge legs can provide path for out-of-balance current, at present the control energy of three-phase four-leg inverter
Enough it is divided under three phase static coordinate abc, under two cordic phase rotator dq0, under two-phase static coordinate α β 0, in three phase static coordinate abc
Under, using third-harmonic zero-sequence voltage, the independent control of three-phase can be realized.But due to three-phase independent control, micro-control unit
The operand of (Micro Control Unit, MCU) is bigger, it is therefore necessary to operand simplified, especially for
For the system for employing multiple three-phase four-leg inverters, it is desirable to parallel connection is carried out using more three-phase four-leg inverters,
Can thus higher requirement be proposed to the control of inverter.Examined from the volume of raising invertor operation speed, reduction inverter
Consider, it is necessary to be designed to three-phase four-leg inverter control, the present invention based on this proposition, exists to three-phase four-leg inverter
Control under unbalanced load and nonlinear load is designed.
The content of the invention
It is an object of the invention to provide a kind of main topological circuit of Three phase four-leg inverter and its control method, leads to
Cross on the basis of repetitive control, the trapper in Repetitive controller is replaced using active damping, realization overcomes Repetitive controller
To the purpose for the problem of a part of FREQUENCY CONTROL effect is faint around trapper；It is controlled using instantaneous voltage, passes through ratio
The output voltage of example resonance control Three phase four-leg inverter, realizing makes space inverter system export good sine
The purpose of the voltage of change.By the derivation of calculation formula, obtaining active damping can be instead of the electric current in voltage and current double closed-loop
Ring, in order to further provide for the dynamic characteristic of space inverter system, three reference voltage feedforward controls are added, realize ginseng
Examine the purpose of electric voltage feed forward.And then the utilization rate of DC voltage is improved, reduce the volume and weight of space inverter system, subtract
The purpose of the operation burden of few microprocessor.
In order to realize the above object the present invention is achieved through the following technical solutions：
A kind of control method of three-phase four-leg inverter, includes procedure below：Real-time sampling three-phase four-leg inverter
Three-phase output voltage and current signal；Controlled with reference to ratio resonance, active damping, Repetitive controller and reference voltage feedforward skill
Art is handled with current signal the voltage；The ratio resonance controls carries out nothing for realizing to instantaneous AC signal
The tracking of static difference；The active damping controls the stabilization for realizing system under zero load, reduces harmonic wave of output voltage content；Institute
State Repetitive controller to be used to reduce harmonic wave of output voltage content of the system with nonlinear load, output meets the voltage of Standard
THD；The reference voltage feedforward control is by the way that three-phase output voltage is fed back to reference voltage side, for realizing electric voltage feed forward
Process, improve the dynamic property of system；Under three-phase static coordinate system, using triple-frequency harmonics control technology, realize to three-phase four
The triggering control of four bridge arms of leg inverter.Preferably, the triple-frequency harmonics control technology further includes procedure below：Make
Three-phase voltage modulated signal in three-phase four-leg inverter is added with triple-frequency harmonics, is entered with the triple-frequency harmonics of four bridge legs injection
Row subtracts each other, and the three-phase voltage of output is remained sinusoidal signal.
Preferably, the ratio resonance control uses bilinear transformation Discrete-time quasi ratio resonance control voltage ring,
In formula, kpIt is proportionality coefficient, krIt is resonance coefficient.ζ is damped coefficient, ω0For fundamental wave angular frequency, s is Laplce
The variable of conversion.
Preferably, the control method further includes procedure below：By the Repetitive controller to the bridge of three-phase four
Harmonic content caused by arm inverter band nonlinear load is controlled, and obtains the active damping output voltage u of every phaser；
ur=[(uref-u)*(GV+RP)-iL*k/kpwm]
In formula, urefFor the reference voltage of any one phase, u is the output voltage of any one phase, iLThe inductance electricity of this corresponding phase
Stream, k/kpwmFor active damping, k is the proportionality coefficient of active damping, and RP represents Repetitive controller.Preferably, when the bridge of three-phase four
During arm inverter zero load, using voltage feedforward control, increase closed-loop valtage gain G, i.e.,
In formula, kv is the electric voltage feed forward added, and s is the variable of Laplace transform, and L is the filter inductance of any one phase；C
For the filter capacitor of any one phase.
Preferably, the triggering of described four bridge arms of three-phase four-leg inverter controls a step to include procedure below：Described three
The three-phase voltage independent control of phase four-leg inverter output, the reference voltage per phase makes the difference with output voltage, by Voltage loop
Transmission function GVWith RP Repetitive controllers, the first control signal is formed, per phase inductance electric current iLaBy active damping k/kpwmPut
Greatly, the second control signal is formed, the first control signal makes the difference with the second control signal, is added with the harmonic signal of injection,
Modulated by SPWM, produce modulated signal, control output voltage of the three-phase four-leg inverter per phase.
Another technical scheme of the present invention is a kind of three-phase four-leg inverter applied to above-mentioned control method, bag
Contain：Dc source E, it exports the DC bus-bar voltage after rectification；Four bridge arms, switching tube VT1 and VT2 A phases bridges in series
Arm, its bridge arm midpoint are U1；VT3 and VT4 B phases bridge arms in series, its bridge arm midpoint are U2；VT5 and VT6 C phases in series
Bridge arm, its bridge arm midpoint are U3；A, B, C three-phase bridge arm is respectively used to export A, B, C three-phase alternating current；VT7 connects with VT8
Four bridge legs are formed, it is neutral conductor bridge arm, and the center of bridge arm is U4, and the bridge arm is used for the center line electricity for providing or controlling inverter
Stream；The one end of bridge arm midpoint U1, U2 and U3 of ABC three-phases respectively with filter inductance L1, L2 and L3 is connected, filter inductance L1, L2
It is connected with the one end of the L3 other end respectively with filter capacitor C1, C2 and C3；Its each tie point is also respectively connected with threephase load
Z1, Z2 and Z3；The midpoint U4 of four bridge legs is connected with filter inductance L4 one end；The filter inductance L4 other end and filter capacitor
C4 one end connection, the filter capacitor C4 other end are connected with negative dc bus；When the inverter is with uneven or non-
During linear load, four bridge legs provide path for the flowing of zero-sequence current, ensure the balance of three-phase output voltage.
Preferably, the voltage at the four bridge legs midpoint filters by LC, and passes through the voltage of the filter capacitor C4 not
It can be mutated, LC wave filters form a low pass filter, for suppressing the common mode interference signal of high frequency.
The present invention has advantages below compared with prior art：
Compared with using Repetitive controller trapper under nonlinear load, the present invention replaces trapper using active damping,
The harmonic wave of output voltage can be reduced, and the amount of calculation of active damping is small compared to the amount of calculation of trapper.
Present invention adds reference voltage feedforward, the dynamic property of space inverter system are more excellent.The ratio of use
Example resonance Instantaneous control can realize the Instantaneous control of output voltage.Electric current loop is replaced by active damping, realizes space
The good dynamic property of inverter system.The system that the present invention is also applied for other inverters simultaneously.
Brief description of the drawings
Fig. 1 is the main circuit topology figure of three-phase four-leg inverter of the present invention；
Fig. 2 is the overall control block diagram of three-phase four-leg inverter of the present invention；
Fig. 3 is any one monocyclic control block diagram of phase voltage in three-phase four-leg inverter of the present invention；
Fig. 4 is three-phase four-leg inverter double-closed-loop control block diagram of the present invention；
Fig. 5 is any one comparison diagram being added to before and after electric voltage feed forward in three-phase four-leg inverter of the present invention；
Fig. 6 is the three-phase no-load output voltage schematic diagram of three-phase four-leg inverter of the present invention；
Fig. 7 is the shock load three-phase output voltage schematic diagram of three-phase four-leg inverter of the present invention；
Fig. 8 is the band nonlinear load three-phase output voltage schematic diagram of three-phase four-leg inverter of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferable specific embodiment in detail, the present invention is further elaborated.
As shown in figure 1, a kind of main topological circuit structure of Three phase four-leg inverter of the present invention includes：Dc source
E, the DC bus-bar voltage after its exportable rectification；Four bridge arms, switching tube VT1 and VT2 A phases bridge arms in series, its bridge arm
Midpoint is U1；VT3 and VT4 B phases bridge arms in series, its bridge arm midpoint are U2；VT5 and VT6 C phases bridge arms in series, its bridge
Arm midpoint is U3；This three bridge arms are used to export ABC three-phase alternating currents；VT7 and VT8 four bridge legs in series, it is neutrality
Line bridge arm, the center of bridge arm is U4, and the bridge arm is used for the current in middle wire for providing or controlling inverter；The bridge arm midpoint of ABC three-phases
The one end of U1, U2 and U3 respectively with filter inductance L1, L2 and L3 is connected, filter inductance L1, the L2 and L3 other end respectively with filter
Ripple electric capacity C1, C2 connects with C3 one end；Its each tie point is also respectively connected with threephase load Z1, Z2 and Z3.
The midpoint U4 of four bridge legs is connected with filter inductance L4 one end；The filter inductance L4 other end and filter capacitor
C1, C2 connect with the C3 other end；When it is with uneven or nonlinear load, four bridge legs can be zero-sequence current
Flowing provides path, it is ensured that the balance of A, B, C three-phase output voltage.The filter inductance L4 other end also with filter capacitor C4
One end connection；The filter capacitor C4 other end is connected with negative dc bus；Such as the v identified in accompanying drawing 11, v2, v3, v4Respectively
It is the voltage among each bridge arm.
In the present embodiment, four bridge legs are provided with high-frequency switch, make the voltage v among four bridge legs4Can be in direct current
Quickly change between busbar voltage E and ground, common mode disturbances can interfere to the normal operation of communication equipment, therefore add
Four bridge legs filter capacitor C4, reduce common mode disturbances.
In the present embodiment, it is a kind of in three phase static coordinate based on being proposed on the basis of above-mentioned three-phase four-leg inverter
Under to three-phase four-leg inverter use third-harmonic zero-sequence voltage control method；As shown in Fig. 2 the u identified in accompanying drawing 2ar,
ubr, ucrIt is the reference voltage of A, B, C phase respectively, ua, ub, ucIt is the output voltage of A, B, C phase respectively, RP is repetitive controller
(Repeat controller, abbreviation RP), GVIt is voltage loop transmission function, iLa, iLb, iLcIt is the inductance electricity of A, B, C phase respectively
Stream, k is the proportionality coefficient of active damping.
A, B, C three-phase voltage independent control, the reference voltage per phase makes the difference with output voltage, by voltage loop transmission function
GVWith RP Repetitive controllers, the first control signal is formed, per phase inductance electric current iLaBy active damping k/kpwmIt is amplified, is formed
Second control signal, the first control signal make the difference with the second control signal, are added with the harmonic signal of injection, by SPWM
Modulation, modulated signal is produced, control the output voltage per phase.
Specifically, A phase reference voltages uarWith A phase output voltages uaMake the difference and show that voltage signal passes through voltage loop transmission function
GVWith RP Repetitive controllers, the first A phase control signals are formed；A phase inductance electric currents iLaBy active damping k/kpwmIt is amplified, shape
Into the 2nd A phase control signals；First A phase controls signal makes the difference with the 2nd A phase control signals, the harmonic signal phase with injection
Add, modulated by SPWM, produce modulated signal, control the output voltage of A phases.The control process of B and C phase output voltages and A phases
It is identical.
Due to the equivalent resistance very little of inductance, then ignore inductive resistance, A, B and the voltage of any one phase in C phases are used
The monocyclic control of voltage.
As shown in figure 3, by using bilinear transformation Discrete-time quasi ratio resonance control voltage ring,
In formula, wherein kpIt is proportionality coefficient, krIt is resonance coefficient.ζ is damped coefficient, ω0It is general to draw for fundamental wave angular frequency, s
The variable of Lars conversion.When discrete, the resonance point position of fundamental frequency is particularly easy to offset quasi- ratio resonance, and it is discrete after
System is easily unstable.In order to ensure the constant of resonance point position, and due to having very big gain to fundamental frequency after discrete,
In the present embodiment, take 10, resonance coefficient kr to take 6000 the proportionality coefficient kp of quasi- ratio resonance, damping coefficientζ takes 0.01, then from
Dissipate after it is discrete after quasi- ratio resonance be：
Using Repetitive Control Technique, harmonic content caused by above-mentioned three-phase four-leg inverter band nonlinear load is entered
Row control, the active damping output voltage u of every phase can be obtainedr；
ur=[(uref-u)*(GV+RP)-iL*k/kpwm] (3)
In formula, urefFor the reference voltage of any one phase, u is the output voltage of any one phase, iLThe inductance electricity of this corresponding phase
Stream, k/kpwmFor active damping, k is the proportionality coefficient of active damping, RP Repetitive controllers.
It was found from from formula (3), inductive current is exaggerated k/kpwmTimes, repetitive controller makes the difference with the inductive current after amplification,
It can be seen that the positive effect reduction of repetitive controller, therefore, it is necessary to counterweight in the controller that active damping and Repetitive controller combine
Multiple controller amplification k/kpwmTimes, the harmonic wave of inductive current could be so controlled.
In the present embodiment, when the gain of low-frequency range Repetitive controller is 1, it is arranged on the low pass of the inverter output end
Voltage, the electric current that wave filter obtains to sampling are filtered.
As shown in figure 4, using Double closed-loop of voltage and current, voltage and current double closed-loop output voltage u can be obtainedr
ur=[(uref-u)*(GV1+RP1)-iL]*Gi (4)
In formula, GiIt is electric current loop transmission function, GV1Represent any one phase voltage ring transmission function；RP1Repetitive controller.By public affairs
Formula (4) understands that repetitive controller output makes the difference with sample rate current, is then multiplied by current loop gain.
When meeting following condition, electric current loop can be amplified on the basis of Voltage loop to Voltage loop：
k/kpwm=Gi
GV+ RP=GV1+RP1 (5)
It is monocyclic with the control form of inductive current active damping that voltage and current double closed-loop can be equivalent to voltage, avoids electricity
Outer shroud and the coupled mode of current inner loop are pressed, the voltage of every phase can be debugged respectively.
Fig. 5 is the contrast bode figures before and after the addition electric voltage feed forward of above-mentioned three-phase four-leg inverter, in the present embodiment
In, when the three-phase four-leg inverter zero load, inductive current iLSmaller, inductive current can be smaller, and voltage deviation passes through
After Repetitive controller output, made the difference with inductive current, the effect that active damping eliminates resonance peak, even larger than inductance can be weakened
Electric current, the negative feedback of inductive current are cancelled, and cause the unloaded concussion of system, therefore we are needed in unloaded or underloading not
Add Repetitive controller.During in order to ensure to add Repetitive controller, system will not produce concussion, in the present embodiment, using electric voltage feed forward
Control, increase closed-loop valtage gain, the dynamic property of system can also be improved；I.e.
In formula, kv is the electric voltage feed forward added, and s is the variable of Laplace transform, and L is the filter inductance of any one phase；C
For the filter capacitor of any one phase.
The electric voltage feed forward used is ratio controlling unit, after adding electric voltage feed forward kv, the three-phase four-leg inverter
Closed loop gain G substantially becomes big, the enhancing of its dynamic response.
As shown in fig. 6, the three-phase four-leg inverter and its control method of the application are imitated using MATLAB softwares
True checking；Fig. 6 is the output voltage waveforms of three-phase no-load, the three-phase output voltage of inverter, three electric capacity, C1, C2, on C3
Voltage, i.e. system are stable, three-phase output voltage THD all very littles under zero load.
Fig. 7 is the three-phase output voltage oscillogram after three-phase shock load as shown in fig. 7, A phases impact in 0.065s is born
Carry, the shock load in 0.072s of B phases, the shock load in 0.078s of C phases, voltage landing very little fully loaded by being partly downloaded to, and
Within less than one primitive period, the output voltage of three-phase just recovers, it is seen that the dynamic property of system is good.
As shown in figure 8, three-phase voltage waveform when it is with nonlinear load, it can be seen that voltage waveform has occurred and that abnormal
Becoming, the THD analytic functions carried by MATLAB softwares, it is that 2.29%, B phase voltages THD is 2.52% to obtain A phase voltages THD,
C phase voltages THD is 2.44%, meets the requirement within Standard 5%.
In summary, the present invention replaces the trapper in Repetitive controller using active damping control, due to the work of trapper
Shaken with being that suppression inverter is unloaded, and active damping can suppresses inverter zero load and shaken, using the monocyclic control of voltage, energy
Enough meet demand for control, and the volume and weight of power-supply system can be mitigated, add reference voltage feedforward control, further
Improve the dynamic property of power-supply system.
The main circuit topology of the three-phase four-leg inverter of the present invention cannot be only used for the inversion of space field secondary power supply
Device controls, and applying also for other needs the occasion of inverter power supply.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a kind of control method of three-phase four-leg inverter, it is characterised in that include procedure below：
The voltage and current signal of the three-phase output of real-time sampling three-phase four-leg inverter；
Controlled with reference to ratio resonance, active damping, Repetitive controller is with reference voltage feed-forward technique to the voltage and current signal
Handled；
The ratio resonance controls the tracking for carrying out floating to instantaneous AC signal for realizing；
The active damping controls the stabilization for realizing system under zero load, reduces harmonic wave of output voltage content；
The Repetitive controller is used to reduce harmonic wave of output voltage content of the system with nonlinear load, and output meets Standard
The THD of voltage；
The reference voltage feedforward control is by the way that three-phase output voltage is fed back to reference voltage side, for realizing electric voltage feed forward
Process, improve the dynamic property of system；
Under three-phase static coordinate system, using triple-frequency harmonics control technology, realize to four bridge arms of three-phase four-leg inverter
Triggering control.
2. the control method of three-phase four-leg inverter as claimed in claim 1, it is characterised in that
The triple-frequency harmonics control technology further includes procedure below：Modulate the three-phase voltage in three-phase four-leg inverter
Signal is added with triple-frequency harmonics, is subtracted each other with the triple-frequency harmonics of four bridge legs injection, the three-phase voltage of output is remained just
String signal.
3. the control method of three-phase four-leg inverter as claimed in claim 1, it is characterised in that
The ratio resonance control uses bilinear transformation Discrete-time quasi ratio resonance control voltage ring,
<mrow>
<msub>
<mi>G</mi>
<mrow>
<mi>P</mi>
<mi>R</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>s</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msub>
<mi>k</mi>
<mi>p</mi>
</msub>
<mo>+</mo>
<mfrac>
<mrow>
<msub>
<mi>k</mi>
<mi>r</mi>
</msub>
<mi>s</mi>
</mrow>
<mrow>
<msup>
<mi>s</mi>
<mn>2</mn>
</msup>
<mo>+</mo>
<mn>2</mn>
<msub>
<mi>&zeta;&omega;</mi>
<mn>0</mn>
</msub>
<mi>s</mi>
<mo>+</mo>
<msubsup>
<mi>&omega;</mi>
<mn>0</mn>
<mn>2</mn>
</msubsup>
</mrow>
</mfrac>
</mrow>
In formula, kpIt is proportionality coefficient, krIt is resonance coefficient, ζ is damped coefficient, ω0For fundamental wave angular frequency, s is Laplace transform
Variable.
4. the control method of three-phase four-leg inverter as claimed in claim 1, it is characterised in that
The control method further includes procedure below：
Harmonic content caused by three-phase four-leg inverter band nonlinear load is controlled by the Repetitive controller
System, obtains the active damping output voltage u of every phaser；
ur=[(uref-u)*(GV+RP)-iL*k/kpwm]
In formula, urefFor the reference voltage of any one phase, u is the output voltage of any one phase, iLThe inductive current of this corresponding phase, k/
kpwmFor active damping, k is the proportionality coefficient of active damping, and RP represents Repetitive controller.
5. the control method of three-phase four-leg inverter as claimed in claim 1, it is characterised in that
When the three-phase four-leg inverter zero load, using voltage feedforward control, increase closed-loop valtage gain G, i.e.,
<mrow>
<mi>G</mi>
<mo>=</mo>
<mfrac>
<mi>u</mi>
<msub>
<mi>u</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
</mfrac>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>G</mi>
<mi>V</mi>
</msub>
<mo>*</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>p</mi>
<mi>w</mi>
<mi>m</mi>
</mrow>
</msub>
<mo>+</mo>
<mi>k</mi>
<mi>v</mi>
<mo>*</mo>
<msub>
<mi>k</mi>
<mrow>
<mi>p</mi>
<mi>w</mi>
<mi>m</mi>
</mrow>
</msub>
</mrow>
<mrow>
<mn>1</mn>
<mo>+</mo>
<mrow>
<mo>(</mo>
<mi>s</mi>
<mi>L</mi>
<mo>+</mo>
<mi>k</mi>
<mo>)</mo>
</mrow>
<mo>*</mo>
<mi>s</mi>
<mi>C</mi>
</mrow>
</mfrac>
</mrow>
In formula, kv is the electric voltage feed forward added, and s is the variable of Laplace transform, and L is the filter inductance of any one phase；C is to appoint
The filter capacitor for a phase of anticipating.
6. the control method of three-phase four-leg inverter as claimed in claim 1, it is characterised in that
The triggering of described four bridge arms of three-phase four-leg inverter controls a step to include procedure below：The three-phase four-arm inversion
The three-phase voltage independent control of device output, the reference voltage per phase makes the difference with output voltage, by voltage loop transmission function GVWith
RP Repetitive controllers, the first control signal is formed, per phase inductance electric current iLaBy active damping k/kpwmIt is amplified, forms second
Control signal, the first control signal make the difference with the second control signal, are added with the harmonic signal of injection, are adjusted by SPWM
System, modulated signal is produced, control output voltage of the three-phase four-leg inverter per phase.
7. a kind of three-phase four-leg inverter applied to claim 1~6 control method, it is characterised in that include：Directly
Flow power supply E, the DC bus-bar voltage after its exportable rectification；Four bridge arms, switching tube VT1 and VT2 A phases bridge arms in series,
Its bridge arm midpoint is U1；VT3 and VT4 B phases bridge arms in series, its bridge arm midpoint are U2；VT5 and VT6 C phases bridges in series
Arm, its bridge arm midpoint are U3；A, B, C three-phase bridge arm is respectively used to export A, B, C three-phase alternating current；VT7 connects structure with VT8
Into four bridge legs, it is neutral conductor bridge arm, and the center of bridge arm is U4, and the four bridge legs are used to provide or control in inverter
Line current；The one end of bridge arm midpoint U1, U2 and U3 of ABC three-phases respectively with filter inductance L1, L2 and L3 is connected, filter inductance
The one end of L1, L2 and L3 other end respectively with filter capacitor C1, C2 and C3 is connected；Its each tie point is also respectively connected with three-phase
Load Z1, Z2 and Z3；The midpoint U4 of four bridge legs is connected with filter inductance L4 one end；The filter inductance L4 other end and filtering
Electric capacity C4 one end connection, the filter capacitor C4 other end are connected with negative dc bus；When the inverter with uneven or
During person's nonlinear load, four bridge legs provide path for the flowing of zero-sequence current, ensure the balance of three-phase output voltage.
8. three-phase four-leg inverter as claimed in claim 7, it is characterised in that
The voltage at the four bridge legs midpoint filters by LC, and can not be mutated by the voltage of the filter capacitor C4, LC filters
Ripple device forms a low pass filter, for suppressing the common mode interference signal of high frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718568.0A CN107579673A (en) | 2017-08-21 | 2017-08-21 | A kind of Three phase four-leg inverter and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718568.0A CN107579673A (en) | 2017-08-21 | 2017-08-21 | A kind of Three phase four-leg inverter and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107579673A true CN107579673A (en) | 2018-01-12 |
Family
ID=61035459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710718568.0A Pending CN107579673A (en) | 2017-08-21 | 2017-08-21 | A kind of Three phase four-leg inverter and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107579673A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718151A (en) * | 2018-06-08 | 2018-10-30 | 哈尔滨工程大学 | A kind of three-phase four-leg inverter output end high frequency voltage noise suppressing method over the ground |
| CN109004649A (en) * | 2018-06-29 | 2018-12-14 | 南京理工大学 | A kind of LCL filter resonance inhibition device and method based on active damping |
| CN109378855A (en) * | 2018-08-31 | 2019-02-22 | 上海电机学院 | A kind of grid simulator topological structure |
| CN110209049A (en) * | 2019-05-22 | 2019-09-06 | 中国科学院光电技术研究所 | A kind of narrowband amplitude Disturbance Rejection method based on inertance loop |
| CN111446877A (en) * | 2020-03-25 | 2020-07-24 | 广东寰宇电子科技股份有限公司 | Control method and system based on two-phase three-bridge-arm inverter circuit |
| CN112583293A (en) * | 2020-12-15 | 2021-03-30 | 武汉力行远方电源科技有限公司 | Control method and system suitable for three-phase four-wire system inverter power supply |
| CN115589170A (en) * | 2022-12-13 | 2023-01-10 | 麦田能源有限公司 | Two-phase inverter system and two-phase inverter control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368442A (en) * | 2013-07-16 | 2013-10-23 | 上海煦达新能源科技有限公司 | Grid-connected inverter |
| CN104410072A (en) * | 2014-12-03 | 2015-03-11 | 天津天传新能源电气有限公司 | Active damping control method for grid-connected inverter |
| CN204633633U (en) * | 2015-06-02 | 2015-09-09 | 皖西学院 | Based on the three-phase four-leg inverter that positive current feedback controls |
-
2017
- 2017-08-21 CN CN201710718568.0A patent/CN107579673A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368442A (en) * | 2013-07-16 | 2013-10-23 | 上海煦达新能源科技有限公司 | Grid-connected inverter |
| CN104410072A (en) * | 2014-12-03 | 2015-03-11 | 天津天传新能源电气有限公司 | Active damping control method for grid-connected inverter |
| CN204633633U (en) * | 2015-06-02 | 2015-09-09 | 皖西学院 | Based on the three-phase four-leg inverter that positive current feedback controls |
Non-Patent Citations (2)
| Title |
|---|
| 官二勇: "基于三次谐波注入法的三相四桥臂逆变电源", 《电工技术学报》 * |
| 罗耀华等: "一种新型三相四桥臂控制策略", 《应用科技》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718151A (en) * | 2018-06-08 | 2018-10-30 | 哈尔滨工程大学 | A kind of three-phase four-leg inverter output end high frequency voltage noise suppressing method over the ground |
| CN108718151B (en) * | 2018-06-08 | 2020-07-14 | 哈尔滨工程大学 | Method for suppressing high-frequency voltage noise of output end of three-phase four-bridge-arm inverter to ground |
| CN109004649B (en) * | 2018-06-29 | 2021-12-28 | 南京理工大学 | LCL filter resonance suppression device and method based on active damping |
| CN109004649A (en) * | 2018-06-29 | 2018-12-14 | 南京理工大学 | A kind of LCL filter resonance inhibition device and method based on active damping |
| CN109378855A (en) * | 2018-08-31 | 2019-02-22 | 上海电机学院 | A kind of grid simulator topological structure |
| CN110209049B (en) * | 2019-05-22 | 2022-04-19 | 中国科学院光电技术研究所 | Narrow-band large-amplitude disturbance suppression method based on inertial loop |
| CN110209049A (en) * | 2019-05-22 | 2019-09-06 | 中国科学院光电技术研究所 | A kind of narrowband amplitude Disturbance Rejection method based on inertance loop |
| CN111446877B (en) * | 2020-03-25 | 2021-06-04 | 广东寰宇电子科技股份有限公司 | Control method and system based on two-phase three-bridge-arm inverter circuit |
| CN111446877A (en) * | 2020-03-25 | 2020-07-24 | 广东寰宇电子科技股份有限公司 | Control method and system based on two-phase three-bridge-arm inverter circuit |
| CN112583293A (en) * | 2020-12-15 | 2021-03-30 | 武汉力行远方电源科技有限公司 | Control method and system suitable for three-phase four-wire system inverter power supply |
| CN112583293B (en) * | 2020-12-15 | 2022-09-27 | 武汉葆源新能科技有限公司 | Control method and system suitable for three-phase four-wire system inverter power supply |
| CN115589170A (en) * | 2022-12-13 | 2023-01-10 | 麦田能源有限公司 | Two-phase inverter system and two-phase inverter control method |
| CN115589170B (en) * | 2022-12-13 | 2023-03-10 | 麦田能源有限公司 | Two-phase inverter system and two-phase inverter control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107579673A (en) | A kind of Three phase four-leg inverter and its control method | |
| Ghosh et al. | Design of a capacitor-supported dynamic voltage restorer (DVR) for unbalanced and distorted loads | |
| Ucar et al. | Control of a 3-phase 4-leg active power filter under non-ideal mains voltage condition | |
| US9455646B2 (en) | Filter device, power converter and common mode noise suppression method | |
| CN103036236B (en) | Control method of wide frequency range multi-type harmonic comprehensive governance system | |
| US6201720B1 (en) | Apparatus and methods for space-vector domain control in uninterruptible power supplies | |
| CN108306329A (en) | The positive damping of HVDC transmission system reconstructs impedance stabilization control method | |
| Bouzidi et al. | Hybrid direct power/current control using feedback linearization of three-level four-leg voltage source shunt active power filter | |
| JP2714195B2 (en) | Voltage fluctuation and harmonic suppression device | |
| CN105553309A (en) | T-type three-level inverter and midpoint balance control method thereof | |
| Geddada et al. | SRF based current controller using PI and HC regulators for DSTATCOM with SPWM switching | |
| CN103606926A (en) | High-capacity unified power quality conditioner based on chain structure and control method thereof | |
| CN106712054B (en) | A kind of STATCOM device inhibiting capacitance voltage pulsation based on modular multilevel | |
| Ponnaluri et al. | Design comparison and control of medium voltage STATCOM with novel twin converter topology | |
| Jiang et al. | Harmonic cancellation of a hybrid converter | |
| Sędłak et al. | Operation of four-leg three-level flying capacitor grid-connected converter for RES | |
| CN102611109B (en) | Method for controlling LC (inductance and capacitance) hybrid active power filter with two switch arms | |
| Sajedi et al. | Modeling and application of UPQC to power quality improvement considering loading of series and shunt converters | |
| CN104901522B (en) | A kind of secondary pulsating power decoupling closed loop control method based on series compensation | |
| CN107147118A (en) | A kind of harmonic controling device administered applied to electrified railway electric energy | |
| Kanaan et al. | Small-signal average modeling, simulation and carrier-based linear control of a three-phase four-leg shunt active power filter | |
| Kanaan et al. | Averaged modelling, simulation and linear control design of a PWM fixed frequency three-phase four-wire shunt active power filter for a typical industrial load | |
| Lin et al. | Analysis and implementation of three-phase power quality compensator under the balanced and unbalanced load conditions | |
| CN111934575A (en) | Output voltage balance control method and medium for train auxiliary converter | |
| Chomat et al. | Compensation of unbalanced three-phase voltage supply in voltage source inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180112 |
|
| RJ01 | Rejection of invention patent application after publication |