CN104393773B - A kind of three-phase voltage type PWM converter predictive-current control method - Google Patents
A kind of three-phase voltage type PWM converter predictive-current control method Download PDFInfo
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- CN104393773B CN104393773B CN201410719557.0A CN201410719557A CN104393773B CN 104393773 B CN104393773 B CN 104393773B CN 201410719557 A CN201410719557 A CN 201410719557A CN 104393773 B CN104393773 B CN 104393773B
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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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Abstract
The invention discloses a kind of three-phase voltage type PWM converter predictive-current control method.By detecting described three-phase voltage type PWM converter three-phase alternating voltage, three-phase alternating current and DC bus-bar voltage；Voltage sample value under Clarke transform is converted into two-phase rest frame and current sampling data；Calculate the difference between described DC bus-bar voltage and DC bus-bar voltage instruction；Obtain commutator instantaneous active power command value by outer voltage controller；Simultaneously according to power tracking error stated value function, to meet predicted current component under cost function minimum analytical calculation two-phase rest frame, and then obtain expecting switching voltage component under two-phase rest frame；Utilization space vector pulse width modulating technology, obtains rectifier switch expectation function.The present invention can effectively eliminate the dependency to rectifier structure parameter for the Classical forecast current control method.
Description
Technical field
The present embodiments relate to voltage-type PWM converter control technology field, more particularly, to a kind of three-phase
Voltage-type PWM converter predictive-current control method.
Background technology
At present, three-phase voltage type PWM converter is widely used to electric power, transport, aerospace field,
This commutator has the advantages that net plan current sinusoidal, power factor are high, can achieve energy in bidirectional flow.
Conventional three-phase voltage-type PWM converter predictive-current control method, using double circle structure, outer shroud
Using DC bus-bar voltage controller, internal ring obtains expectation switching voltage vector.Such double circle structure have current harmonics little,
The advantage that switching frequency is stable, static properties is good.
But Classical forecast current control method there is also certain defect：Classical forecast current control method is to three-phase voltage
Type PWM converter Structure Dependence is big, and structural parameters sensitive easily causes that system loses stable state or even system collapses
Routed problem.
Content of the invention
The embodiment of the present invention provides a kind of three-phase voltage type PWM converter predictive-current control method, to solve
Certainly Classical forecast current control method is big to three-phase voltage type PWM converter Structure Dependence, and structural parameters change
Sensitivity easily causes the problem that system loses stable state or even system crash.
In a first aspect, embodiments providing a kind of three-phase voltage type PWM converter predicted current control
Method processed, including：
Detect that described three-phase voltage type PWM converter three-phase alternating voltage, three-phase alternating current and direct current are female
Line voltage；
Described three-phase alternating voltage, described three-phase alternating current are converted into two-phase rest frame through Clarke transform
Under voltage sample value and current sampling data；
Calculate the difference between described DC bus-bar voltage and set DC bus-bar voltage command value；
Using described outer voltage controller, export three-phase voltage type PWM converter instantaneous active power and refer to
Make value；
According to voltage sample value and current sampling data under rest frame, and described three-phase voltage type pulse width modulation
Commutator instantaneous active power command value, obtains expecting switching voltage component under two-phase rest frame；
According to expectation switching voltage component, utilization space vector pulse width modulation skill under described two-phase rest frame
Art, determines commutator expectation on off state function, realizes described three-phase voltage type PWM converter predicted current control
System.
Further, described Clarke transform adopts invariable power to convert.
Further, the described expectation switching voltage component step that obtains is specially：
Described three-phase voltage type PWM converter instantaneous power is set up according to described instantaneous reactive power theory
Mathematical model discretization, obtain described commutator instantaneous active power actual value and instantaneous reactive power in the sampling period real
Actual value；
According to described outer voltage controller instantaneous active power command value；And set instantaneous reactive power command value as 0；
According to commutator instantaneous active power described in the sampling period and actual value and instruction both instantaneous reactive power
Tracking error between value, constructs cost function；
Calculating makes cost function reach predicted current component under commutator two-phase rest frame during minima；
By described commutator discrete voltage Equation for Calculating, obtain described commutator exchange input expectation switching voltage and divide
Amount.Second aspect, the embodiment of the present invention additionally provides a kind of three-phase voltage type PWM converter predictive-current control
Device, this device includes：
Parameter detection module, for detect described three-phase voltage type PWM converter three-phase alternating voltage,
Three-phase alternating current and DC bus-bar voltage；
Clarke transform module, for described parameter detection module is monitored described three-phase alternating voltage, described three
Voltage sample value under Clarke transform is converted into two-phase rest frame for the cross streams electric current and current sampling data；
Bus mathematic interpolation template, for calculating between described DC bus-bar voltage and set DC bus-bar voltage command value
Difference；
Outer voltage module, for using using outer voltage controller, the described three-phase voltage type pulse width of output is adjusted
Commutator instantaneous active power command value processed；
Current inner loop module, for according to voltage sample value and current sampling data under rest frame, and described voltage
Outer ring controller instantaneous active power command value, obtains expecting switching voltage component under two-phase rest frame；
Space vector pulse width modulation module, for utilization space vector pulse width modulating technology, according to described two
Expect switching voltage component under phase rest frame, determine commutator expectation on off state function.
Further, instantaneous power variable is introduced in predicted current method, described Clarke transform module is using permanent work(
Rate converts.
Further, described current inner loop module includes：
Described instantaneous power unit, for setting up described three-phase voltage type pulse width according to described instantaneous reactive power theory
Degree modulation rectification device instantaneous power mathematical model discretization, obtain described commutator instantaneous active power in the sampling period actual
Value and instantaneous reactive power actual value；
Described power 0 value cell, for obtaining instantaneous active power command value according to described outer voltage controller；And make
Instantaneous reactive power value is 0；
Described cost function unit, for according to commutator instantaneous active power described in the sampling period and instantaneous reactive work(
The actual value of both rates and command value, calculate instantaneous active power tracking error and instantaneous reactive power tracking error, construction
Cost function；
Described function minimum unit, makes cost function reach the biphase static coordinate of commutator during minima for calculating
The lower predicted current component of system；
Described expectation switching voltage component cells, described for by described commutator discrete voltage Equation for Calculating, obtaining
Commutator exchange input expectation switching voltage component.
The embodiment of the present invention is passed through to propose a kind of three-phase voltage type PWM converter predictive-current control method,
Detecting described three-phase voltage type PWM converter three-phase alternating voltage, three-phase alternating current and DC bus-bar voltage
On the basis of, voltage sample value and current sampling data under rest frame are obtained by described Clarke transform；Calculate institute simultaneously
State difference between DC bus-bar voltage and DC bus-bar voltage command value, and then utilize described outer voltage actuator, draw described
Commutator instantaneous active power；And then it is calculated two with voltage sample value, current sampling data under described two-phase rest frame
Expect switching voltage component under item rest frame, and then utilization space vector pulse width modulating technology obtains described commutator
Switch expectation function, realizes described three-phase voltage type PWM converter predictive-current control.The present invention solves tradition
Predictive-current control method is big to three-phase voltage type PWM converter Structure Dependence, and structural parameters sensitive is easy
Cause system to lose the problem of stable state or even system crash, realize three-phase voltage type PWM converter and efficiently control.
Brief description
Fig. 1 is the three-phase voltage type PWM converter predictive-current control method that the embodiment of the present invention one provides
Flowchart；
Fig. 2 is the three-phase voltage type PWM converter predictive-current control method that the embodiment of the present invention two provides
Flowchart；
Fig. 3 is three-phase voltage type PWM converter predictive-current control schematic device of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure is illustrate only in description, accompanying drawing.
Embodiment one
The three-phase voltage type pulse width modulation (PWM) commutator predictive-current control that Fig. 1 provides for the embodiment of the present invention one
The flow chart of method.Fig. 3 be three-phase voltage type PWM converter predictive-current control main circuit of the present invention and
Control circuit structural representation.
The present embodiment is applicable to three-phase voltage type PWM converter predictive-current control, and the method can be by
Three-phase voltage type PWM converter predictive-current control device, to execute, specifically includes following operation：
Step 101, the described three-phase voltage type PWM converter three-phase alternating voltage of detection, three-phase alternating current
And DC bus-bar voltage；
Wherein, described three-phase voltage type PWM converter is Three-phase PWM Voltage Rectifier；Described three intersect
Stream voltage is respectively ea,eb,ec, described three-phase alternating current is ia,ib,ic, described DC bus-bar voltage is Udc.
Step 102, described three-phase alternating voltage, described three-phase alternating current are converted into through Clarke transform biphase quiet
The only voltage sample value under coordinate system and current sampling data；
Wherein, described Clarke Clark conversion is by each physics change of variable based on 3 axles, the stator stationary coordinate system of 2 dimensions
To in the stator stationary coordinate system of 2 axles.Therefore, the described three-phase alternating voltage difference under described three-phase static coordinate system a-b-c
For ea,eb,ecIt is converted into eα,eβ, described three-phase alternating current ia,ib,icIt is converted into iα,iβ.
Meanwhile, instantaneous power variable is introduced in predicted current method the present embodiment, described Clarke Clark conversion is adopted
Converted with invariable power.
Wherein, described instantaneous reactive power theory is thought, instantaneous active power and instantaneous reactive power are respectively：
Wherein, p is described instantaneous active power, and q is described instantaneous reactive power.
Difference between step 103, the described DC bus-bar voltage of calculating and set DC bus-bar voltage command value
Wherein, described set DC bus-bar voltage command value is target expectation instruction value, and when system is inputted, institute is defeated
Entering data volume is busbar voltage command value.
Step 104, utilize outer voltage controller, export three-phase voltage type PWM converter instantaneous active work(
Rate command value pref；
Wherein, described outer voltage controller is proportional integral PI controller, and its input quantity is that DC bus-bar voltage is actual
Difference between value and DC bus-bar voltage command value, it is output as commutator instantaneous active powerWherein, gpFor the proportionality coefficient of described outer voltage PI controller, giFor
The integral coefficient of described outer voltage PI controller.
Step 105, according to voltage sample value and current sampling data under rest frame, and described three-phase voltage type pulse
Width modulated commutator instantaneous active power value, obtains expecting switching voltage component under two-phase rest frame；
Wherein, described voltage sample value is eα,eβ, described current sampling data is iα,iβ, described outer voltage controller wink
When active power be pref, obtaining expectation switching voltage component under described two-phase rest frame is urα *, urβ *
Step 106, according under described two-phase rest frame expect switching voltage component, utilization space vector pulse width
Modulation technique, determines commutator expectation on off state function, realizes described three-phase voltage type PWM converter prediction
Current control.
Wherein, described space vector pulse width modulation technology, be when being powered with three-phase symmetrical sine voltage three relatively
Motor stator sub-ideal magnetic linkage circle is called reference standard, does suitable switching with three-phase inverter difference switching mode, thus shape
Become PWM ripple, accurate magnetic linkage circle is followed the trail of with the actual flux linkage vector being formed.
Described switch function Sx(x=a, b, c), represents the switch conditions of Three-phase PWM Voltage Rectifier three-phase brachium pontis, when
SxRepresent when=1 that brachium pontis conducting, lower brachium pontis turn off, conversely, working as SxRepresent when=0 that lower brachium pontis conducting, upper brachium pontis turn off.
The embodiment of the present invention is on the basis of retaining original main circuit and testing circuit structure, electric by changing Classical forecast
Ring structure in flow control, realizes the efficient control of three-phase voltage type PWM converter.Wherein, described three-phase voltage type
PWM converter predictive-current control method is pre- to meet the minimum control targe of power tracking error cost function
Survey next sampling instant alternating current, efficiently solve the dependency to system structure parameter for the Classical forecast current methods.
Embodiment two
The stream of the three-phase voltage type PWM converter predicted current method that Fig. 2 provides for the embodiment of the present invention two
Cheng Tu.Fig. 3 is three-phase voltage type PWM converter predictive-current control main circuit of the present invention and control circuit
Structural representation.
The present embodiment is applicable to three-phase voltage type PWM converter predictive-current control, and the method can be by
Three-phase voltage type PWM converter predicted current device, to execute, specifically includes following operation：
Step 201, the described three-phase voltage type PWM converter three-phase alternating voltage of detection, three-phase alternating current
And DC bus-bar voltage；
Wherein, described three-phase voltage type PWM converter is Three-phase PWM Voltage Rectifier；Described three intersect
Stream voltage is respectively ea,eb,ec, described three-phase alternating current is ia,ib,ic, described DC bus-bar voltage is Udc.
Step 202, described three-phase alternating voltage, described three-phase alternating current are converted into through Clarke transform biphase quiet
The only voltage sample value under coordinate system and current sampling data；
Wherein, described Clarke Clark conversion is by each physics change of variable based on 3 axles, the stator stationary coordinate system of 2 dimensions
To in the stator stationary coordinate system of 2 axles.Therefore, the described three-phase alternating voltage difference under described three-phase static coordinate system a-b-c
For ea,eb,ecIt is converted into eα,eβ, described three-phase alternating current ia,ib,icIt is converted into iα,iβ.
Meanwhile, instantaneous power variable is introduced in predicted current method the present embodiment, described Clarke Clark conversion is adopted
Converted with invariable power.
Wherein, described reactive power theory is expressed as under two-phase rest frame：
Wherein, p is described instantaneous active power, and q is described instantaneous reactive power.
Difference between step 203, the described DC bus-bar voltage of calculating and set DC bus-bar voltage command value
Wherein, described set DC bus-bar voltage command value is target expectation instruction value, and when system is inputted, institute is defeated
Entering data volume is busbar voltage command value.
Step 204, utilize outer voltage controller, export three-phase voltage type PWM converter instantaneous active work(
Rate command value pref；
Wherein, described outer voltage controller is proportional integral PI controller, and described proportionality coefficient is used for proportion adjustment and makees
With making output voltage produce transition；Described integral coefficient is used for static error and adjusts.
Described outer voltage controller instantaneous active powerWherein, gp
For the proportionality coefficient of described outer voltage PI controller, giIntegral coefficient for described outer voltage PI controller.
Step 205, described three-phase voltage type PWM converter is set up according to described instantaneous reactive power theory
Instantaneous power mathematical model discretization, obtain described commutator instantaneous active power tracking error value and wink in the sampling period
When reactive power tracking error value；
Set ω as alternating voltage angular frequency, TsFor the sampling time.Described three-phase is set up according to instantaneous reactive power theory
Voltage type PWM rectifier instantaneous power mathematical model discretization, can obtain that commutator in k-th sampling period produces instantaneously has
Work(power tracking error delta p and instantaneous reactive power tracking error Δ q are respectively：
Step 206, according to described outer voltage controller instantaneous active power command value；And so that instantaneous reactive power is instructed
It is worth for 0, by described commutator discrete voltage Equation for Calculating, obtain described commutator exchange input expectation switching voltage component.
Wherein, make instantaneous reactive power command value qref=0, to meet described Three-phase PWM Voltage Rectifier unit power
Factor runs, and according to described instantaneous active power value pref, commutator discrete voltage Equation for Calculating commutator AC-input voltage
Expect componentWith
Step 207, according to commutator instantaneous active power tracking error value described in the sampling period and instantaneous reactive work(
Rate tracking error is worth to cost function；
Wherein, described first cost function E=Δ p2+Δq2, Δ p represents in (k+1) TsSampling instant PWM rectifier
Instantaneous active power command value and the difference of its expected value, Δ q represents (k+1) TsSampling instant PWM rectification instantaneous reactive power
Command value and the difference of its expected value.p*Represent corresponding active power expected value, q*Represent corresponding reactive power expected value, and then
And for realizing predictive-current control, instantaneous power is in (k+1) TsThe predictive value in moment is equal to it in this moment
Expected value, i.e. pk+1=p*, qk+1=q*, and then described second cost function EsFor：
Step 208, the described cost function of calculating reach predicted current under commutator two-phase rest frame during minima and divide
Amount.
When being required to meet t=(k+1) TsSecond cost function E described in momentsReach minima, then the exchange of this moment
Current forecasting component iα,k+1And iβ,k+1For：
Step 209, discretization is carried out to rectifier voltage equation under two-phase rest frame.And described current forecasting is divided
Amount is brought into, by being calculated expectation switching voltage component under two-phase rest frame.
Step 210, according under described two-phase rest frame expect switching voltage component, utilization space vector pulse width
Modulation technique, determines commutator expectation on off state function, realizes described three-phase voltage type PWM converter prediction
Current control.
Wherein, described space vector pulse width modulation technology, be when being powered with three-phase symmetrical sine voltage three relatively
Motor stator sub-ideal magnetic linkage circle is called reference standard, does suitable switching with three-phase inverter difference switching mode, thus shape
Become PWM ripple, tracker accurate magnetic linkage circle is come with the actual flux linkage vector being formed.
Described switch function Sx(x=a, b, c), represents the switch conditions of Three-phase PWM Voltage Rectifier three-phase brachium pontis, when
SxRepresent when=1 that brachium pontis conducting, lower brachium pontis turn off, conversely, working as SxRepresent when=0 that lower brachium pontis conducting, upper brachium pontis turn off.
The embodiment of the present invention is on the basis of retaining original main circuit and testing circuit structure, electric by changing Classical forecast
Ring structure in flow control, realizes the efficient control of three-phase voltage type PWM converter.Wherein, by making three-phase voltage
Type PWM converter is operated under unity power factor state, adopt set instantaneous reactive power command value as 0 with
Meet the minimum control targe of power tracking error cost function and predict next sampling instant alternating current, efficiently solve tradition
The dependency to system structure parameter for the predicted current method.
Embodiment three
Fig. 3 is three-phase voltage type PWM converter predictive-current control schematic device of the present invention.As
Shown in Fig. 3, this schematic diagram mainly includes in conventional three-phase circuit and three-phase circuit peripheral circuit inductance, electric capacity, resistance and partly leads
Body audion；Additionally, also including three-phase voltage type PWM converter predictive-current control device knot in this schematic diagram
Structure schematic diagram
Described three-phase voltage type PWM converter predicted current apparatus structure includes：Parameter detection module 301,
Clarke transform module 302, bus difference block 303, outer voltage module 304, current inner loop module 305 and space vector
Pulse width modulation module 306.
Wherein, described parameter detection module 301, for detecting the three of described three-phase voltage type PWM converter
Cross streams voltage, three-phase alternating current and DC bus-bar voltage；And detect described three-phase alternating voltage refer to, three-phase alternating current
Flow valuve is transferred to described Clarke transform module 302, and described d-c bus voltage value is transferred to described bus difference block
303.
Described Clarke transform module 302, for the described three-phase alternating current described parameter detection module 301 is detected
Pressure, voltage sample value under Clarke transform is converted into two-phase rest frame for the described three-phase alternating current and current sample
Value；
Described bus mathematic interpolation template 303, refers to for calculating described DC bus-bar voltage and set DC bus-bar voltage
Difference between order；
Described outer voltage module 304, for using outer voltage controller, exporting three-phase voltage type pulse width modulation
Commutator instantaneous active power command value；
Described current inner loop module 305, for according to voltage sample value and current sampling data, Yi Jisuo under rest frame
State outer voltage controller instantaneous active power command value, obtain expecting switching voltage component under two-phase rest frame.
Wherein, described current inner loop module 305 includes instantaneous power unit, power 0 value cell, cost function, function
Little value cell and expectation switching voltage component cells.
Described instantaneous power unit, for setting up described three-phase voltage type pulse width according to described instantaneous reactive power theory
Degree modulation rectification device instantaneous power mathematical model discretization, obtain described commutator instantaneous active power in the sampling period actual
Value and instantaneous reactive power actual value；
Described power 0 value cell, for obtaining instantaneous active power command value according to described outer voltage controller；And make
Instantaneous reactive power value is 0；
Described cost function unit, for according to commutator instantaneous active power described in the sampling period and instantaneous reactive work(
The actual value of both rates and command value, calculate instantaneous active power tracking error and instantaneous reactive power tracking error, construction
Cost function；
Described function minimum unit, makes cost function reach the biphase static coordinate of commutator during minima for calculating
The lower predicted current component of system；
Described expectation switching voltage component cells, described for by described commutator discrete voltage Equation for Calculating, obtaining
Commutator exchange input expectation switching voltage component.
Described space vector pulse width modulation module 306, for utilization space vector pulse width modulating technology, according to
Expect switching voltage component under described two-phase rest frame, obtain rectifier switch expectation function.
The embodiment of the present invention is on the basis of retaining original main circuit and testing circuit structure, electric by changing Classical forecast
Ring structure in flow control, realizes the efficient control of three-phase voltage type PWM converter.Wherein, described three-phase voltage type
PWM converter predictive-current control device is pre- to meet the minimum control targe of power tracking error cost function
Survey next sampling instant alternating current, efficiently solve the dependency to system structure parameter for the Classical forecast current methods.
The upper described preferred embodiment being only the embodiment of the present invention, is not limited to the embodiment of the present invention, for ability
For field technique personnel, the embodiment of the present invention can have various change and change.All spirit in the embodiment of the present invention and principle
Within any modification, equivalent substitution and improvement made etc., should be included within the protection domain of the embodiment of the present invention.
Claims (4)
1. a kind of three-phase voltage type PWM converter predictive-current control method is it is characterised in that include following walking
Suddenly：
Step one, detect described three-phase voltage type PWM converter three-phase alternating voltage, three-phase alternating current and straight
Stream busbar voltage；
Step 2, described three-phase alternating voltage, described three-phase alternating current are converted into biphase static seat through Clarke transform
Voltage sample value under mark system and current sampling data；
Difference between step 3, the described DC bus-bar voltage of calculating and set DC bus-bar voltage command value；
Step 4, utilize outer voltage controller, output three-phase voltage type PWM converter instantaneous active power refer to
Make value；
Step 5, according to voltage sample value and current sampling data under rest frame, and described three-phase voltage type pulse width
Modulation rectification device instantaneous active power value, obtains expecting switching voltage component under two-phase rest frame；
Step 6, according under described two-phase rest frame expect switching voltage component, utilization space vector pulse width modulation
Technology, determines commutator expectation on off state function, realizes described three-phase voltage type PWM converter predicted current
Control；
Wherein, described step 5 is specially：
A, described three-phase voltage type PWM converter instantaneous power mathematical modulo is set up according to instantaneous reactive power theory
Type discretization, obtain described commutator instantaneous active power actual value and instantaneous reactive power actual value in the sampling period；
B, according to described outer voltage controller obtain instantaneous active power command value；And make instantaneous reactive power value be 0；
C, the actual value according to both commutator instantaneous active power described in the sampling period and instantaneous reactive power and command value,
Calculate instantaneous active power tracking error and instantaneous reactive power tracking error, construct cost function；
D, calculating make cost function reach predicted current component under commutator two-phase rest frame during minima；
E, by described commutator discrete voltage Equation for Calculating, obtain described commutator exchange input expectation switching voltage component.
2. three-phase voltage type PWM converter predictive-current control method according to claim 1, its feature
It is, instantaneous power variable is introduced in predicted current method, in described step 2, Clarke transform adopts invariable power to convert.
3. a kind of three-phase voltage type PWM converter predictive-current control device is it is characterised in that include：
Parameter detection module, for detecting three-phase alternating voltage, the three-phase of described three-phase voltage type PWM converter
Alternating current and DC bus-bar voltage；
Clarke transform module, for the described three-phase alternating voltage monitoring by described parameter detection module, described three intersects
Flow voltage sample value under Clarke transform is converted into two-phase rest frame for the electric current and current sampling data；
Bus mathematic interpolation template, for calculating the difference between described DC bus-bar voltage and set DC bus-bar voltage command value
Value；
Outer voltage module, for using outer voltage controller, exporting described three-phase voltage type PWM converter
Instantaneous active power command value；
Current inner loop module, for according to voltage sample value and current sampling data under rest frame, and described outer voltage
Controller instantaneous active power command value, obtains expecting switching voltage component under two-phase rest frame；
Space vector pulse width modulation module, for utilization space vector pulse width modulating technology, according to described biphase quiet
Only expect switching voltage component under coordinate system, determine commutator expectation on off state function；
Wherein, described current inner loop module includes：
Instantaneous power unit, for setting up described three-phase voltage type PWM converter according to instantaneous reactive power theory
Instantaneous power mathematical model discretization, obtain described commutator instantaneous active power actual value and instantaneous nothing in the sampling period
Work(power actual value；
Power 0 value cell, for obtaining instantaneous active power command value according to described outer voltage controller, and makes instantaneous reactive
Performance number is 0；
Cost function unit, for according to both commutator instantaneous active power described in the sampling period and instantaneous reactive power
Actual value and command value, calculate instantaneous active power tracking error and instantaneous reactive power tracking error, construct cost function；
Function minimum unit, makes cost function reach prediction under commutator two-phase rest frame during minima for calculating
Current component；
Expect switching voltage component cells, hand over for by described commutator discrete voltage Equation for Calculating, obtaining described commutator
Stream input expectation switching voltage component.
4. three-phase voltage type PWM converter predictive-current control device according to claim 3, its feature
It is, instantaneous power variable is introduced in predicted current method, described Clarke transform module adopts invariable power to convert.
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| CN111555642A (en) * | 2020-05-18 | 2020-08-18 | 西安交通大学 | Predictive direct power control method |
| CN113533998A (en) * | 2021-07-20 | 2021-10-22 | 南京工程学院 | Predictive control method for three-phase alternating current electronic load |
| CN114938153B (en) * | 2022-05-16 | 2024-03-15 | 山东大学 | Fixed time command filtering control method and system for three-phase PWM converter |
| CN116545281B (en) * | 2023-05-06 | 2023-10-03 | 燕山大学 | Three-phase current type PWM rectifier modulation algorithm with narrow pulse suppression capability |
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