CN104993494B - Motor simulator based on four-quadrant power electronic converter and method - Google Patents
Motor simulator based on four-quadrant power electronic converter and method Download PDFInfo
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Abstract
The invention provides a motor simulator based on four-quadrant power electronic converter and a method. The motor simulator comprises an input switch, an input transformer, a connection inductor, a power unit, an output inductor and an output switch. Modulating waves are added on a rectification side of the power unit so as to allow the voltage of the power unit to become stable. Voltage and current on the output end of the four-quadrant power electronic converter are controlled so that the four-quadrant power electronic converter is changed to produce or absorb active or reactive power, thereby simulating running characteristics of a synchronous generator, an asynchronous generator, a synchronous motor and an asynchronous motor. During simulation of characteristics of generators, the converter can be used for providing power for load, providing a test source for the load so as to detect characteristics of the load, and also adjusting reactive power of the grid power. During simulation of the motor, the converter can be used for providing load for a to-be-detected power supply so as to detect the characteristics of the power supply, or be used as the load for adjusting power balance of the power grid. The motor simulator is convenient to control and responses timely.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of motor based on four-quadrant electronic power convertor
Analog and method.
Background technology
Motor has vital effect in commercial production and development test.Synchronous generator, asynchronous generator can
To send active power and perception, capacitive reactive power, therefore active, idle tune can be carried out for load supplying or to electrical network
Section.Synchronous motor, asynchronous motor can absorb active power and perception, capacitive reactive power, therefore can be used as load
Or active, Reactive-power control is carried out to electrical network.
As the inertia of conventional motors is big, low-response and function has limitation, the control to motor is more complicated, therefore,
Favored with power electronic equipment simulated machine characteristic.The Chinese invention patent of Application No. 201410157692.0 is disclosed
《A kind of micro- operated control method of the microgrid based on virtual synchronous electromotor》, the patent utilization power electronics is simulating synchronous generator
Characteristic, can simulate synchronous generator carries out active regulation and Reactive-power control to microgrid, while being also capable of achieving the different fortune of microgrid
Switching under row mode, but the method can only simulate the operation characteristic of synchronous generator, with certain limitation.
The content of the invention
It is an object of the invention to provide a kind of motor simulation device and method based on four-quadrant electronic power convertor,
The characteristic of synchronous generator, asynchronous generator can be both simulated, the characteristic of synchronous motor, asynchronous motor can also have been simulated.
For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of motor simulation device based on four-quadrant electronic power convertor, including input switch, input tranformer, company
Reactance, power cell, output reactance, output switch and the first control system are connect, the input tranformer adopts three single-phase changes
Depressor cascaded structure, former limit adopt delta connection, secondary to adopt many vice-side winding structures, each vice-side winding to be sequentially connected
Connection reactance and single power cell, are coupled together using cascade form between the single power cell on each vice-side winding,
Composition single-phase power cells, power cell are made up of three single-phase power cells, and the outfan of three single-phase power cells is divided equally
Not Tong Guo output reactance and output switch be connected with electrical network or Devices to test, the outfan of power cell is using with the star-like of center line
Connection, the inverter side of the first control system control connection power cell, enters to the inverter side of power cell for forming modulating wave
Row modulation；
First control system when modulating wave is formed, the first reference value and reality to power cell inverter side active power
The difference of actual value carries out PI controls, while reference value and reality of first control system also to power cell inverter side reactive power
The difference of value carries out PI controls, and the PI control results of active power and reactive power are carried out coordinate transform, power cell is obtained
The current reference value of inverter side, difference of first control system again by this reference value with power cell inverter side current actual value are carried out
Repetitive study control, obtains voltage modulation signal, and then the first control system is by the output voltage of current transformer outfan and advanced
It is added in the modulation voltage of 90 ° of output end voltage, obtains voltage feedforward control signal, finally, the first control system is by this voltage
Feed-forward control signals are added with voltage modulation signal, obtain the modulating wave of power cell inverter side, and this modulating wave is added in power
The inverter side of unit, you can the inverter side of power cell is modulated, so as to adjusting means output voltage and output current
Phase place.
Single power cell on described each vice-side winding is whole using the back-to-back connected mode of two H bridges, left side H bridges
Stream side, right side H bridges are inverter side, and H bridges adopt all-controlled semiconductor device, and are parallel with reverse fly-wheel diode, in two H bridges
Between be parallel with storage capacitor.
Coupled together using cascade form between single power cell on each described vice-side winding, cascade number by
Treat that the electric pressure of simulated machine determines, the inverter side of the single power cell per phase adopts phase-shifting carrier wave Sine Wave Pulse Width Modulation
Mode is controlled.
Also include the second control system, the rectification side of the second control system control connection power cell, for forming modulation
Ripple is modulated to power cell rectification side, and when modulating wave is formed, the second control system is by first by the energy storage for collecting electricity
The voltage for holding two ends carries out sliding window and is averaging, after obtaining the meansigma methodss of a cycle, then by this meansigma methods and storage capacitor two
The difference of the rated voltage at end carries out PI controls, and the output signal that PI is controlled is collected by the second control system again with voltage transformer
Input tranformer vice-side winding voltage be multiplied after, obtain the reference value of power cell input current, then, second control system
The difference of the measured value of the power cell input current that this reference value and current transformer are collected by system carries out P controls, is adjusted
Signal processed, then, the second control system obtains feedforward letter after the voltage of input tranformer vice-side winding is carried out P controls
Number, finally, modulated signal is added by the second control system with feed-forward control signals, you can obtain the modulation of power cell rectification side
This modulating wave is added in the rectification side of power cell by ripple, you can the rectification side of power cell is modulated, is made on storage capacitor
With stable voltage.
A kind of motor simulation method based on four-quadrant electronic power convertor, is comprised the following steps successively
(1) input switch is first closed, input tranformer is devoted oneself to work, and storage capacitor is started to charge up；
(2) the voltage U needed for selectingref, electric current Iref, phase angle thetaref, calculate active power reference value Pref, reactive power
Reference value Qref, wherein, Pref=UrefIrefcosθref, Qref=UrefIrefsinθref, subscript ref represents electrical network；
(3) active-power P and reactive power Q of power cell inverter side are gathered using power sensor, by what is calculated
Active power reference value PrefA PI controllers are input into the difference of the active-power P for measuring power cell inverter side, will
Reactive power reference qref Q for calculatingrefCarry out with the input of the difference of the reactive power Q for measuring power cell inverter side defeated
Enter the 2nd PI controllers, it is inverse that the active power and reactive power after PI controls obtains power cell after coordinate transform
Become current reference value i of side*；The computing formula of the first PI controllers isThe computing formula of the 2nd PI controllers isWherein, kp3、kp4It is proportionality coefficient, ki3、ki4Integral coefficient is, subscript p represents ratio, and subscript i represents long-pending
Point；
(4) the current actual value i of power cell inverter side is gathered using current transformers, the power that step (3) is obtained
Current reference value i of unit inverter side*With the current actual value i of power cell inverter sidesDifference carry out repetitive study control,
Obtain modulated signal Vm1；
(5) using voltage transformer harvester output end voltage us, by voltage usIt is multiplied by proportionality coefficient kp5After obtain with
The synchronous component k of output voltagep5us, voltage us⊥It is multiplied by proportionality coefficient kp6Obtain afterwards being ahead of the component of 90 ° of output voltage
kp6us⊥, kp5usWith kp6us⊥After addition, feed-forward control signals V are obtainedm2, by modulated signal Vm1With feed-forward control signals Vm2It is added
Afterwards, obtain the modulating wave V of single power cell inverter sidem, voltage us⊥To be ahead of the voltage of 90 ° of device output end voltage, under
Mark p represents ratio；
(6) the modulating wave V of the single power cell inverter side that step (5) is obtainedmStagger 180/N successively, and N is every phase work(
The number of rate unit, you can obtain the modulating wave of each power cell；
(7) modulating wave of each power cell for obtaining step (6) is added in the inverter side of power cell successively, to power
The inverter side of unit is controlled, so as to adjusting means output voltage and the phase place of output.
Also including step (8) to step (13), specially：
(8) voltage at storage capacitor two ends is gathered using voltage transformer, u is designated asdc, its sliding window is averaging and obtains one
The meansigma methodss in cycleSubscript dc represents direct current；
(9) meansigma methodss that step (8) is obtainedWith the reference value of storage capacitor both end voltageDifference DELTA udcIt is defeated
Enter the 3rd PI controllers, obtain signal delta I, reference valueSize be equal to storage capacitor rated voltage；3rd PI is controlled
The computing formula of device isWherein, kpFor proportionality coefficient, p represents ratio, kiFor integral coefficient, i represents integration, and s is represented
Laplace transform；
(10) the voltage u of input tranformer vice-side winding is gathered using voltage transformers1, the signal that step (9) is obtained
Δ I and input tranformer vice-side winding voltage us1The reference value of power cell input current is obtained after multiplicationSubscript s1 is represented
Transformer secondary, subscript s indication transformer；
(11) the input current i of power cell is gathered using current transformers, by the reference value of power cell input currentWith the measured value i of power cell input currentsDifference DELTA isThe first P controller is input into, proportionality coefficient k is multiplied byp1Afterwards, obtain
Voltage modulation signal um1, wherein, subscript p represents ratio；
(12) by the voltage u of the input tranformer vice-side winding for collectings1The second P controller is input into, proportionality coefficient is multiplied by
kp2Afterwards, obtain voltage feedforward control signal um2, by voltage modulation signal um1With voltage feedforward control signal um2It is added, obtains work(
The modulating wave u of rate unit rectification sidem, wherein, subscript s1 indication transformer secondary, subscript s indication transformer, subscript p represent ratio
Example；
(13) the modulating wave u that step (12) is obtainedmThe rectification side of power cell is added in, is made to have on storage capacitor and is stablized
Voltage.
The present invention can simulate the characteristic of synchronous generator, synchronous motor, asynchronous generator, asynchronous motor simultaneously.
When 0~90 ° of electric current leading voltage, current transformer sends active power power and capacitive reactive power；Electricity after current hysteresis
When pressing 0~90 °, current transformer sends active power and lagging reactive power, and either synchronously or asynchronously electromotor is special for now current transformer simulation
Property.
When 90~180 ° of electric current leading voltage, current transformer absorbs active power and lagging reactive power；After current hysteresis
During 90~180 ° of voltage, current transformer absorbs active power and capacitive reactive power, and now current transformer simulation is either synchronously or asynchronously electronic
Machine characteristic.
In generator property, current transformer can provide power supply for load, and alternatively load provides test pill to detect load
Characteristic, can also adjust power system reactive power etc.；In motor characteristic, current transformer can be provided for the nuclear-electric power supply that needs checking as load
Load can act also as load regulation grid power balance etc. to detect power supply characteristic；The present invention is using four-quadrant electric power electricity simultaneously
Sub- current transformer simulated machine, easy to control, response is timely.
Description of the drawings
Fig. 1 is the motor simulation device topology diagram based on four-quadrant electronic power convertor of the present invention；
Fig. 2 is the circuit diagram of power cell in Fig. 1 shown devices；
Fig. 3 is the topological structure schematic diagram of Monophase electric power electronic inverter in Fig. 1 shown devices；
Fig. 4 is the generating algorithm block diagram of power cell rectification side modulating wave shown in Fig. 2；
Fig. 5 is power cell inverter side modulating wave generating algorithm block diagram when current transformer is grid-connected；
Fig. 6 is single-phase output terminal voltage current vector figure shown in Fig. 3.
Specific embodiment
As shown in Figure 1 to Figure 3, the motor simulation device based on four-quadrant electronic power convertor of the present invention includes
Input switch 101, input tranformer 102, connection reactance 103, power cell 104, output reactance 105, output switch 106, the
One control system and the second control system, structure of the input tranformer 102 using three single-phase transformer series connection, former limit adopt three
Angular connection, secondary adopt many vice-side winding structures, each vice-side winding respectively to connect reactance 103 and single power list
Unit, is coupled together using cascade form between the single power cell on each vice-side winding, constitutes single-phase power cells, cascade
Number determined by the electric pressure for treating analog systemss, between the single power cell on each vice-side winding using phase-shifting carrier wave just
String ripple pulsewidth modulation (CPS-SPWM) mode is controlled, and power cell 104 is made up of three single-phase power cells, and three single-phase
The outfan of power cell respectively passes through output reactance 105 and output switch 106 is connected with electrical network or Devices to test, power list
The outfan of unit 104 is using the wye connection with center line.
Using the back-to-back connected mode of two H bridges, left side H bridges are rectification to single power cell on each vice-side winding
Side, H bridge in right side is inverter side, and storage capacitor C is parallel between two H bridges, and G1, G2, G3, G4, G5, G6, G7, G8 are to be parallel with
The IGBT of reverse fly-wheel diode.
The inverter side of the first control system control connection power cell 104, for forming modulating wave to power cell 104
Inverter side is modulated, the first control system formed modulating wave when, the first reference to 104 inverter side active power of power cell
The difference of value and actual value carries out PI controls, while ginseng of first control system also to 104 inverter side reactive power of power cell
The difference for examining value and actual value carries out PI controls, the PI control results of active power and reactive power is carried out coordinate transform, is obtained
To the current reference value of 104 inverter side of power cell, the first control system is again by this reference value and 104 inverter side of power cell electricity
The difference of stream actual value carries out repetitive study control, obtains voltage modulation signal, and then the first control system is by current transformer outfan
Output voltage and be ahead of 90 ° of output end voltage modulation voltage be added, obtain voltage feedforward control signal, finally, first
This voltage feedforward control signal is added by control system with voltage modulation signal, obtains the modulating wave of 104 unit inverter side of power,
This modulating wave is added in into the inverter side of power cell, you can the inverter side of power cell is modulated, so as to adjusting means is defeated
Go out the phase place of voltage and then output current.
The rectification side of the second control system control connection power cell 104, it is whole to power cell 104 for forming modulating wave
Stream side is modulated, and when modulating wave is formed, the second control system is by first entering the voltage at the storage capacitor C two ends for collecting
Row sliding window is averaging, after obtaining the meansigma methodss of a cycle, then by the rated voltage at this meansigma methods and storage capacitor C two ends it
Difference carries out PI controls, the input tranformer that the output signal that PI is controlled by the second control system again is collected with voltage transformer
After the voltage of 102 vice-side windings is multiplied, obtain the reference value of 104 input current of power cell, then, the second control system by this
The difference of the measured value of 104 input current of power cell that reference value is collected with current transformer carries out P controls, obtains modulation letter
Number, then, the second control system obtains feed-forward control signals after the voltage of 102 vice-side winding of input tranformer is carried out P controls,
Finally, modulated signal is added by the second control system with feed-forward control signals, you can obtain the modulation of 104 rectification side of power cell
This modulating wave is added in the rectification side of power cell 104 by ripple, you can the rectification side of power cell 104 is modulated, energy storage is made
There is on electric capacity C stable voltage.
As shown in Fig. 4 Fig. 5, the motor simulation method based on four-quadrant electronic power convertor of the present invention is wrapped successively
Include following steps：
(1) input switch 101 is first closed, input tranformer 102 is devoted oneself to work, and storage capacitor C is started to charge up；
(2) voltage at storage capacitor C two ends is gathered using voltage transformer, u is designated asdc, its sliding window is averaging and obtains one
The meansigma methodss in individual cycleWherein subscript dc represents direct current；
The voltage u at storage capacitor two endsdcIt is actual to include DC component and AC compounent, but AC compounent amplitude it is less and
It is difficult to be controlled, so will be to udcControl be changed into its DC componentControl, by udcSliding window is averaging and obtains one
The meansigma methodss in individual cycleThat is DC componentSliding window is averaging using sliding window fft analysis method, is known technology, here
Repeat no more.
(3) meansigma methodss that step (2) is obtainedWith the reference value of storage capacitor C both end voltagesDifference DELTA udc
The 3rd PI controllers are input into, signal delta I is obtained, the computing formula of the 3rd PI controllers isWherein, kpFor proportionality coefficient,
P represents ratio, kiFor integral coefficient, i represents integration, and s represents Laplace transform, reference valueSize be equal to energy storage electricity
Hold the rated voltage at C two ends, can be by looking into handbook acquisition, Δ udcAcquisition can be made the difference by software.
(4) the voltage u of 102 vice-side winding of input tranformer is gathered using voltage transformers1, the letter that step (3) is obtained
Number Δ I and 102 vice-side winding voltage u of input tranformers1The reference value of 104 input current of power cell is obtained after multiplicationIts
Middle subscript s1 represents 102 secondary of input tranformer, and subscript s represents input tranformer 102, Δ I and 102 secondary of input tranformer around
Group voltage us1It is multiplied.
(5) the input current i of power cell 104 is gathered using current transformers, by 104 input current of power cell
Reference valueWith the measured value i of 104 input current of power cellsDifference DELTA isThe first P controller is input into, proportionality coefficient is multiplied by
kp1, obtain voltage modulation signal um1, wherein, subscript p represents ratio, and subscript p1 is only that differentiation is acted on, and non-variables, subscript m,
M1 and s only play differentiation effect, and non-variables, Δ isAcquisition is made the difference by software.
(6) by the voltage u of 102 vice-side winding of input tranformer for collectings1The second P controller is input into, ratio system is multiplied by
Number kp2Afterwards, obtain voltage feedforward control signal um2, the voltage modulation signal u that step (5) is obtainedm1Believe with voltage feedforward control
Number um2It is added, obtains the modulating wave u of 104 rectification side of power cellm, by this modulating wave umThe rectification side of power cell 104 is added in,
The voltage on storage capacitor C is made to keep stable, wherein, subscript s1 represents 102 secondary of input tranformer, and subscript s represents that input becomes
Depressor 102, subscript m, m2 play differentiation effect, and non-variables, and subscript p represents ratio, and subscript p2 is only differentiation effect, not
Variable.
(7) the voltage U needed for selectingref, electric current Iref, phase angle thetaref, calculate active power reference value Pref, reactive power
Reference value Qref, wherein, Pref=UrefIrefcosθref, Qref=UrefIrefsinθref, subscript ref represents electrical network.
The outlet side of device of the present invention is connected to certain position of electrical network, therefore voltage UrefIt is to determine, electric current Iref
And phase angle thetarefThen need voluntarily to determine according to user.
(8) active-power P and reactive power Q of 104 inverter side of power cell are gathered using power sensor, will be calculated
Active power reference value PrefPI controls are input into the difference of the active-power P for measuring 104 inverter side of power cell
Device, the computing formula of a PI controllers isBy reactive power reference qref Q for calculatingrefWith measure power list
The difference of the reactive power Q of first inverter side is input into the 2nd PI controllers, and the computing formula of the 2nd PI controllers is
Power cell is obtained through the active power and reactive power after PI controls after dq-abc conversion (i.e. coordinate transform) inverse
Become current reference value i of side*；
kp3、kp4It is proportionality coefficient, ki3、ki4Integral coefficient is, subscript p represents ratio, and subscript i represents integration, subscript
P3, p4, i3, i4 are only that differentiation is acted on, and non-variables；Dq-abc is converted, i.e., coordinate is transformed to known technology, and here is no longer gone to live in the household of one's in-laws on getting married
State.
(9) the current actual value i of 104 inverter side of power cell, the work(that step (8) is obtained are gathered using current transformer
Current reference value i of 104 inverter side of rate unit*Carry out repeating with the difference of the current actual value i of 104 inverter side of power cell
Control is practised, modulated signal V is obtainedm1, subscript m and m1 only play differentiation effect, and non-variables.
Repetitive study control process as shown in Fig. 6 Block Diagrams, k in figurerFor feedback proportional coefficient, it is to ensure certain stablizing
Nargin, k in the present embodimentrTake 0.8~2；kfFor forgetting factor, less than 1, in the present embodiment, value is 0.95 to usual value；ksFor
Repetitive controller coefficient, works as krWith kfAfter value determines, ksValue affects system stability, works as ksWhen=2, system is in critical steady
It is fixed, therefore ks0~2 is taken, k in the present embodimentsValue is 1~1.5, e-sTRepresent the time delay operator of learning cycle, repetitive learning control
Process processed is compensated using the periodicity of error signal, the circular error of system is progressively decayed or is eliminated, so that
The system output of obtaining reaches the control strategy of target.Using repetitive study control, can realize to instruction current accurately with
Guarantee while track that the static error for compensating is zero.In the present invention, using above-mentioned repetitive study control process, voltage can be made
Modulated signal Vm1Reach desired value.
(10) using voltage transformer harvester output end voltage us, for A phases, output terminals A N in as Fig. 3
Voltage between 2 points, by output end voltage usIt is multiplied by proportionality coefficient kp5After obtain and output end voltage usSynchronous component
kp5us, voltage us⊥It is multiplied by proportionality coefficient kp6Obtain afterwards being ahead of the component k of 90 ° of output voltagep6us⊥, voltage us⊥To be ahead of
The voltage that 90 ° of device output end voltage, obtains using phase-shifting transformer, kp5usWith kp6us⊥After addition, feedforward letter is obtained
Number Vm2, modulated signal V that step (9) is obtainedm1With feed-forward control signals Vm2It is added, obtains single power cell inverter side
Modulating wave Vm, wherein, subscript p represents ratio, and subscript p5, p6, m, m2, s only play differentiation effect, and non-variables.
Single power cell adopts cascade form, by the modulating wave V of above-mentioned single power cell inverter sidemStagger successively
180/N, N are the number of every phase power cell, you can obtain the modulating wave of each power cell.
(11) modulating wave of each power cell for obtaining step (10) is added in the inverter side of power cell 104 successively,
Power cell 104 is controlled, so as to adjust the phase place of output voltage and output current.
Operationally, the modulating wave obtained in above-mentioned steps is separately added into the rectification side of power cell and inversion to the present invention
Side, measures the amplitude and phase place of output end voltage and electric current respectively, as shown in fig. 6,For output end voltage,For outfan electricity
Stream, θ is output end currentAdvanced output end voltageAngle, with output end voltageAs reference vector, when outfan electricity
StreamIn 0~90 ° of the advanced output end voltage phase place of first quartile, i.e. output end current phase place, current transformer send active power and
Capacitive reactive power；Work as output end currentIn iv quadrant, i.e. 0~90 ° of output end current delayed phase output end voltage phase place
When, current transformer sends active power and lagging reactive power, current transformer simulation synchronous generator and asynchronous in the case of both the above
The characteristic of electromotor.
Work as output end currentIn 90~180 ° of the advanced output end voltage phase place of ii quadrant, i.e. output end current phase place,
Current transformer absorbs active power and inductive reactive power rate；Work as output end currentIn ii I quadrant, i.e. output end current delayed phase
During 90~180 ° of output end voltage phase place, current transformer absorbs active power and capacitive reactive power, unsteady flow in the case of both the above
Device simulates the characteristic of synchronous motor and asynchronous motor.
Claims (6)
1. a kind of motor simulation device based on four-quadrant electronic power convertor, it is characterised in that：Including input switch, input
Transformator, connection reactance, power cell, output reactance, output switch and the first control system, the input tranformer adopt three
Individual single-phase transformer cascaded structure, former limit adopt delta connection, secondary to adopt many vice-side winding structures, and each vice-side winding is equal
Reactance and single power cell are sequentially connected, are connected using cascade form between the single power cell on each vice-side winding
Come, constitute single-phase power cells, power cell is made up of three single-phase power cells, and the outfan of three single-phase power cells is equal
Pass through output reactance respectively and output switch is connected with electrical network or Devices to test, the outfan of power cell is using the star with center line
Type connection, the inverter side of the first control system control connection power cell, for forming inverter side of the modulating wave to power cell
It is modulated；
First control system when modulating wave is formed, the first reference value and actual value to power cell inverter side active power
Difference carry out PI controls, while the first control system is also to the reference value and actual value of power cell inverter side reactive power
Difference carries out PI controls, and the PI control results of active power and reactive power are carried out coordinate transform, power cell inversion is obtained
The current reference value of side, the first control system is again by the current reference value of power cell inverter side and power cell inverter side electric current
The difference of actual value carries out repetitive study control, obtains voltage modulation signal, and then the first control system is by four-quadrant power electronics
The output voltage of current transformer outfan and be ahead of 90 ° of output end voltage modulation voltage be added, obtain voltage feedforward control letter
Number, finally, this voltage feedforward control signal is added by the first control system with voltage modulation signal, obtains power cell inverter side
Modulating wave, this modulating wave is added in into the inverter side of power cell, you can the inverter side of power cell is modulated, so as to adjust
The phase place of regulating device output voltage and output current.
2. a kind of motor simulation device based on four-quadrant electronic power convertor as claimed in claim 1, it is characterised in that：
Using the back-to-back connected mode of two H bridges, left side H bridges are rectification side to single power cell on described each vice-side winding, right
Side H bridges are inverter side, and H bridges adopt all-controlled semiconductor device, and are parallel with reverse fly-wheel diode, between two H bridges simultaneously
It is associated with storage capacitor.
3. a kind of motor simulation device based on four-quadrant electronic power convertor as claimed in claim 2, it is characterised in that：
Coupled together using cascade form between single power cell on each described vice-side winding, cascade number is electric by simulation is treated
The electric pressure of machine determines that the inverter side of the single power cell per phase is carried out using phase-shifting carrier wave Sine Wave Pulse Width Modulation mode
Control.
4. a kind of motor simulation device based on four-quadrant electronic power convertor as claimed in claim 3, it is characterised in that：
Also include the second control system, the rectification side of the second control system control connection power cell, for modulating wave being formed to power
Unit rectification side is modulated, and when modulating wave is formed, the second control system passes through first by the storage capacitor two ends for collecting
Voltage carries out sliding window and is averaging, after obtaining the meansigma methodss of a cycle, then by the specified of this meansigma methods and storage capacitor two ends
Difference in voltage carries out PI controls, and the output signal that PI is controlled by the second control system again is become with the input that voltage transformer is collected
After the voltage of depressor vice-side winding is multiplied, the reference value of power cell input current is obtained, then, the second control system is by power
The difference of the measured value of the power cell input current that the reference value of unit input current is collected with current transformer carries out P controls
System, obtains modulated signal, then, before the second control system is obtained after the voltage of input tranformer vice-side winding is carried out P controls
Feedforward control signal, finally, modulated signal is added by the second control system with feed-forward control signals, you can obtain power cell rectification
This modulating wave is added in the rectification side of power cell by the modulating wave of side, you can the rectification side of power cell is modulated, storage is made
There can be stable voltage on electric capacity.
5. it is simulated using a kind of motor simulation device based on four-quadrant electronic power convertor described in claim 4
Method, it is characterised in that：Comprise the following steps successively
(1) input switch is first closed, input tranformer is devoted oneself to work, and storage capacitor is started to charge up；
(2) the voltage U needed for selectingref, electric current Iref, phase angle thetaref, calculate active power reference value Pref, reactive power reference
Value Qref, wherein, Pref=UrefIrefcosθref, Qref=UrefIrefsinθref, subscript ref represents reference value；
(3) active-power P and reactive power Q of power cell inverter side are gathered using power sensor, it is active by what is calculated
Value and power reference PrefA PI controllers are input into the difference of the active-power P for measuring power cell inverter side, will be calculated
Reactive power reference qref QrefThe 2nd PI controllers are input into the difference of the reactive power Q for measuring power cell inverter side,
Active power and reactive power after PI controls obtains the current reference of power cell inverter side after coordinate transform
Value i*；The computing formula of the first PI controllers isThe computing formula of the 2nd PI controllers isWherein, kp3、
kp4It is proportionality coefficient, ki3、ki4Integral coefficient is, subscript p represents ratio, and subscript i represents integration, and s represents that Laplce becomes
Change；
(4) the current actual value i of power cell inverter side is gathered using current transformers, the power cell that step (3) is obtained
Current reference value i of inverter side*With the current actual value i of power cell inverter sidesDifference carry out repetitive study control, obtain
Modulated signal Vm1；
(5) using voltage transformer harvester output end voltage us, by voltage usIt is multiplied by proportionality coefficient kp5After obtain and export electricity
Press synchronous component kp5us, voltage us⊥It is multiplied by proportionality coefficient kp6Obtain afterwards being ahead of the component k of 90 ° of output voltagep6us⊥,
kp5usWith kp6us⊥After addition, feed-forward control signals V are obtainedm2, by modulated signal Vm1With feed-forward control signals Vm2After addition, obtain
The modulating wave V of single power cell inverter sidem, voltage us⊥To be ahead of the voltage of 90 ° of device output end voltage, subscript p is represented
Ratio；
(6) the modulating wave V of the single power cell inverter side that step (5) is obtainedmStagger 180/N successively, and N is every mutually single work(
The number of rate unit, you can obtain the modulating wave of each single-phase power cells；
(7) modulating wave of each single-phase power cells for obtaining step (6) is added in the inverter side of power cell successively, to power
The inverter side of unit is controlled, so as to adjusting means output voltage and the phase place of output.
6. a kind of analogy method as claimed in claim 5, it is characterised in that also including step (8) to step (13), specifically
For：
(8) voltage at storage capacitor two ends is gathered using voltage transformer, u is designated asdc, by voltage udcSliding window is averaging and obtains one
The meansigma methodss in cycleSubscript dc represents direct current；
(9) meansigma methodss that step (8) is obtainedWith the reference value of storage capacitor both end voltageDifference DELTA udcInput the
Three PI controllers, obtain signal delta I, reference valueSize be equal to storage capacitor rated voltage；The meter of the 3rd PI controllers
Calculating formula isWherein, kpFor proportionality coefficient, p represents ratio, kiFor integral coefficient, i represents integration, and s represents La Pula
This conversion；
(10) the voltage u of input tranformer vice-side winding is gathered using voltage transformers1, signal delta I that step (9) is obtained with
Input tranformer vice-side winding voltage us1The reference value of power cell input current is obtained after multiplicationSubscript s1 indication transformer
Secondary；
(11) the input current i of power cell is gathered using current transformers, by the reference value of power cell input currentWith
The measured value i of power cell input currentsDifference DELTA isThe first P controller is input into, proportionality coefficient k is multiplied byp1Afterwards, obtain voltage
Modulated signal um1, wherein, subscript p represents ratio；
(12) by the voltage u of the input tranformer vice-side winding for collectings1The second P controller is input into, proportionality coefficient k is multiplied byp2Afterwards,
Obtain voltage feedforward control signal um2, by voltage modulation signal um1With voltage feedforward control signal um2It is added, obtains power cell
The modulating wave u of rectification sidem, wherein, subscript s1 indication transformer secondary, subscript s indication transformer, subscript p represent ratio；
(13) the modulating wave u that step (12) is obtainedmThe rectification side of power cell is added in, makes that there is on storage capacitor stable electricity
Pressure.
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