CN108959780A - The big signal simulation model of Monophase electric power electronic transformer - Google Patents
The big signal simulation model of Monophase electric power electronic transformer Download PDFInfo
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- CN108959780A CN108959780A CN201810737971.2A CN201810737971A CN108959780A CN 108959780 A CN108959780 A CN 108959780A CN 201810737971 A CN201810737971 A CN 201810737971A CN 108959780 A CN108959780 A CN 108959780A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
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Abstract
The present invention relates to power system transformers to emulate field, and in particular to a kind of big signal simulation model of Monophase electric power electronic transformer, it is therefore intended that improves simulation velocity.Simulation model of the invention includes the equivalent large-signal model of cascaded H-bridges converter and double active equivalent large-signal models of bridging parallel operation.Wherein, the equivalent large-signal model of cascaded H-bridges converter is by cascaded H-bridges converter module, the first controlled voltage source H1, the first controlled current source S1With Support Capacitor C1It constitutes；Cascaded H-bridges converter module includes 4 input signals and 4 output terminals；Double active equivalent large-signal models of bridging parallel operation are by double active bridge converter modules, equivalent resistance Req, equivalent inductance Leq, output lateral capacitance C2, the second controlled voltage source H2With the second controlled current source S2It constitutes；Double active bridge converter modules include 4 input signals and 4 output terminals.The present invention can accelerate simulation velocity of Monophase electric power electronic transformer when by the load big signal disturbance such as switching or failure.
Description
Technical field
The present invention relates to power system transformers to emulate field, and in particular to a kind of big signal of Monophase electric power electronic transformer
Simulation model.
Background technique
To meet the mesohigh power distribution network application demand in the following smart grid, become both at home and abroad for polymorphic type power electronics
Depressor (Power Electronic Transformer, PET) expansion research.Except the voltage class transformation for having traditional transformer
Outside electrical isolation function, PET can also realize the functions such as trend two-way flow, utility power quality control, device automatic protection.It examines
The resistance to voltage levels for considering power semiconductor are applied at present in the PET of mesohigh power distribution network generally by more power module cascade connections
Composition, and each power module includes H bridging parallel operation and double active bridging parallel operations, by by the outlet side co-production of power module
Raw DC voltage supply user uses.Nowadays, the cascade connection type PET that electric system is applied can be divided into single-phase PET and
Three-phase PET, and three-phase PET can be connect by three single-phase PET according to star or corner connection mode forms.
For the design of Monophase electric power electronic transformer, stability is most basic, most crucial and most complicated part.?
In actual moving process, there is interaction in each cascade, system is believed greatly by load switching or failure etc. between power module
It possibly can not work in preset stable operating point when number disturbance, DC bus-bar voltage occur, to fall, shake etc. other extremely existing
As.It can be run by the stability for utilizing Computer Simulation to predict system in advance in the design phase to improve system performance and improving
Reliability provides guarantee.
Method commonly used in the prior art is: imitative to construct to 1 method using simulation model and element 1 in actual circuit
True mode.But cause system scale huge since concatenated power module is more, it is calculated using simulation software and needs to spend largely
Time, it is also possible to occur calculating the case where not restraining, cause emulation that can not carry out.Therefore, Monophase electric power electronic transformer is established
The big signal simulation model of device, it is most important for analysis system operation stability and quickening system emulation speed.
The method for constructing big signal simulation model in the prior art is using models such as gyrators.Monophase electric power electronic transformer
The big signal simulation model of device specifically includes that cascaded H-bridges converter and double active equivalent large-signal models of bridging parallel operation.For cascade
The equivalent large-signal model of H bridging parallel operation, existing scheme are generally basede on power-balance principle, ignore power loss in converter, adopt
With gyrator equivalent model, converter is exchanged into input side and DC output side is equivalent to two controlled current sources, outlet side by
Control output of the control signal of current source from capacitance voltage list closed-loop control system, the model emulation fast speed, but nothing
Double closed-loop control system in method object simulating simulation model；For double active bridging parallel operations, LC resonance formula and non-is generally comprised
Resonant mode, when the frequency in LC resonance circuit in the switching frequency and converter of power semiconductor in the double active bridging parallel operations of LC resonance formula
When rate is identical, the open loop control mode that 50% duty ratio square-wave voltage of output can be used carries out power transmission, this kind of control mode
It is relatively simple, when such double equivalent large-signal models of active transducer are established using gyrator, generally require by complicated meter
Calculation machine programs the control signal for acquiring controlled current source in gyrator model.In addition to gyrator model, existing scheme be can also be used
Discrete domain model and large-signal model based on modern control theory, simulation accuracy is higher, but model is complex, can not
Acquire analytical form of the system under time domain.
Summary of the invention
In order to solve the above problem in the prior art, the invention proposes a kind of big signals of Monophase electric power electronic transformer
Simulation model improves emulation speed of Monophase electric power electronic transformer when by the load big signal disturbance such as switching or failure
Degree.
An aspect of of the present present invention proposes a kind of big signal simulation model of Monophase electric power electronic transformer, the Monophase electric power
Electronic transformer includes N number of power module, and each power module is made of H bridging parallel operation and double active bridging parallel operations；N number of H bridge
The input side of converter cascades, and the outlet side of each H bridging parallel operation is parallel with Support Capacitor C1′；Each double active bridgings change
Device includes the resonance circuit being made of capacitor and high frequency transformer, the resonance circuit use open loop duty ratio for 50% square wave
Voltage is controlled；The outlet side of each double active bridging parallel operations is parallel with output lateral capacitance C2′；N number of double active bridgings change
The outlet side of device is in parallel；
The simulation model includes: that the equivalent large-signal model of cascaded H-bridges converter and the double active bridgings being attached thereto change
The equivalent large-signal model of device；
The equivalent large-signal model of cascaded H-bridges converter is used to simulate N number of H in the Monophase electric power electronic transformer
Bridging parallel operation；
Double active equivalent large-signal models of bridging parallel operation are N number of in the Monophase electric power electronic transformer for simulating
Double active bridging parallel operations.
Preferably, the Monophase electric power electronic transformer further include: Double closed-loop of voltage and current system；
Correspondingly, the simulation model further include: Double closed-loop of voltage and current model；
The Double closed-loop of voltage and current model is for simulating the Double closed-loop of voltage and current system.
Preferably, the equivalent large-signal model of cascaded H-bridges converter include: cascaded H-bridges converter module, it is first controlled
Voltage source H1, the first controlled current source S1With Support Capacitor C1；
Wherein,
The cascaded H-bridges converter module includes: 4 input signal ug、ig、UC1, N and 4 output terminal a1、b1、
c1、d1；
ugFor the alternating voltage reference signal of the collected Double closed-loop of voltage and current model output, igFor acquisition
To the simulation model in current on line side signal, UC1For the collected Support Capacitor C1Voltage signal, N be the list
Phase electric power electric transformer concatenated power module number；
a1、b1Respectively with the first controlled voltage source H1Positive and negative electrode control terminal connection；c1、d1Respectively with described
One controlled current source S1Positive and negative electrode control terminal connection；
The first controlled voltage source H1Two voltage terminals connect power grid；The first controlled current source S1It is positive and negative
Pole output terminal respectively with the Support Capacitor C1Positive and negative electrode connection.
Preferably, double active equivalent large-signal models of bridging parallel operation include:
Double active bridge converter modules, equivalent resistance Req, equivalent inductance Leq, output lateral capacitance C2, the second controlled voltage source
H2With the second controlled current source S2；
Wherein,
Double active bridge converter modules include 4 input signal Icur、Udc, k, N and 4 output terminal a2、b2、
c2、d2；
UdcFor the collected output lateral capacitance C2The d. c. voltage signal at both ends, IcurFor described in collected flow through
Equivalent resistance ReqCurrent signal, k is single double active bridging parallel operation medium-high frequency transformations of the Monophase electric power electronic transformer
The former and deputy polygonal voltage no-load voltage ratio of device, N are the Monophase electric power electronic transformer concatenated power module number；
a2、b2Respectively with the second controlled voltage source H2Positive and negative electrode control terminal connection；c2、d2Respectively with described
Two controlled current source S2Positive and negative electrode control terminal connection；
The second controlled voltage source H2Cathode voltage terminal successively with the equivalent resistance Req, the equivalent inductance Leq
After series connection, with the Support Capacitor C1Anode connection；The second controlled voltage source H2Cathode voltage terminal and the support
Capacitor C1Cathode connection；The second controlled current source S2Positive and negative electrode output terminal respectively with the output lateral capacitance C2's
Positive and negative electrode connection.
Preferably, the Support Capacitor C1Value are as follows:
C1=C1′
Wherein, C1' for the support of outlet side parallel connection of H bridging parallel operation single in the Monophase electric power electronic transformer it is electric
Hold.
Preferably, the output terminal a of the cascaded H-bridges converter module1、b1The voltage control signal of output are as follows:
uab1=ug
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output.
Preferably, the output terminal c of the cascaded H-bridges converter module1、d1The current controling signal of output are as follows:
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output, igFor the collected emulation
Current on line side signal in model, N are the Monophase electric power electronic transformer concatenated power module number, UC1It is collected described
Support Capacitor C described in simulation model1Voltage signal.
Preferably, the output lateral capacitance C2Value be that N number of double active bridgings change in the Monophase electric power electronic transformer
Device exports lateral capacitance C2' the sum of capacity.
Preferably, the equivalent resistance ReqValue are as follows:
Wherein, RlossFor the high frequency transformer folding in double active bridging parallel operations single in the Monophase electric power electronic transformer
Calculate on high-tension side former and deputy side coil resistance.
Preferably, the equivalent inductance LeqValue are as follows:
Wherein, LresFor by the high frequency transformer in active bridging parallel operations single double in the Monophase electric power electronic transformer
When vice-side winding short circuit, the inductance value that is measured at high frequency transformer primary side winding.
Preferably, the output terminal a of double active bridge converter modules2、b2The voltage control signal of output are as follows:
Uab2=kUdc
Wherein, k is the former and deputy of single double active bridging parallel operation medium/high frequency transformers of the Monophase electric power electronic transformer
Polygonal voltage no-load voltage ratio, UdcTo export lateral capacitance C described in the collected simulation model2The d. c. voltage signal at both ends.
Preferably, the output terminal c of double active bridge converter modules2、d2The current controling signal of output are as follows:
Icd2=kNIcur
Wherein, k is the former and deputy of single double active bridging parallel operation medium/high frequency transformers in the Monophase electric power electronic transformer
Polygonal voltage no-load voltage ratio, N are the Monophase electric power electronic transformer concatenated power module number, IcurFor the collected emulation mould
Equivalent resistance R is flowed through in typeeqCurrent signal.
Compared with prior art, the invention has the following beneficial effects:
Compared with existing 1 pair of 1 simulation model, Monophase electric power electronic transformer simulation model of the invention avoids scale
Huge cascade module reduces the calculating time of simulation software, improves Monophase electric power electronic transformer and throws by load
It cuts or simulation velocity when the big signal disturbances such as failure；With use gyrator equivalent model to construct big signal simulation in the prior art
Model is compared, and system of the invention is relatively simple, can find out analytical form of the system under time domain.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of Monophase electric power electronic transformer in the embodiment of the present invention；
Fig. 2 is the composition schematic diagram of double closed-loop control system in the embodiment of the present invention；
Fig. 3 is the composition schematic diagram of the big signal simulation model of Monophase electric power electronic transformer in the embodiment of the present invention；
Fig. 4 is that cascade of the embodiment of the present invention equivalent large-signal model of H bridging parallel operation and double active bridging parallel operations are equivalent big
The composition schematic diagram of signal model；
Fig. 5 is to increase 500kW/1.125 Ω electricity suddenly by light condition in 0.3s using existing 1 pair of 1 simulation model
The exchange side voltage u emulated when resistance loadsa, ac-side current ig, Support Capacitor C1On voltage UC1With outlet side DC voltage
UdcWaveform；
Fig. 6 be in the embodiment of the present invention the big signal simulation model of Monophase electric power electronic transformer in 0.3s by light condition
The exchange side voltage u emulated when increasing 500kW/1.125 Ω ohmic load suddenlysa, ac-side current ig, Support Capacitor C1On
Voltage UC1With outlet side DC voltage UdcWaveform.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
The a little technical principles of embodiment for explaining only the invention, it is not intended that limit the scope of the invention.
Fig. 1 is the composition schematic diagram of Monophase electric power electronic transformer.Fig. 2 is the composition schematic diagram of double closed-loop control system.
As shown in Figure 1, the one-way power electronic transformer includes N number of power module, and each power module is had by H bridging parallel operation with double
Source bridging parallel operation is constituted；The input side of N number of H bridging parallel operation cascades, and the outlet side of each H bridging parallel operation is parallel with Support Capacitor
C1′；Each double active bridging parallel operations include capacitor Cr1、Cr2With the resonance circuit of high frequency transformer composition, accounted for using open loop
Sky for 50% square-wave voltage than being controlled；The outlet side of each double active bridging parallel operations is parallel with output lateral capacitance C2′；
The outlet side of N number of double active bridging parallel operations is in parallel.In addition, further including double closed-loop control system as shown in Figure 2, for controlling H
Bridging parallel operation.The control system is traditional outlet side capacitance voltage outer ring+current inner loop double closed-loop control system, wherein
Udc_refFor the direct voltage reference value of active bridging parallel operation outlet sides double in control system, UdcFor active bridging parallel operations double in Fig. 1
The DC voltage of outlet side, usaFor network voltage, ig_refFor in control system after capacitance voltage outer ring PI controller grid side
Current reference value, igFor the electric current of grid side in Fig. 1, ugFor the alternating voltage reference signal of output.
The method that simulation model and actual circuit element 1 are generallyd use in the prior art to 1 constructs Computer Simulation mould
Type, obtained model structure are identical as Fig. 1 and Fig. 2.
The parameter of Monophase electric power electronic transformer is as follows in the embodiment of the present invention:
Single phase ac side voltage usa: 10kV；
Bridge arm filter inductance Lg: 10mH；
Concatenated power module number N:6；
Support Capacitor C1': 2mF；
Support Capacitor voltage rating UC1: 1600V；
Double active bridging parallel operation resonant capacitance Cr1: 90 μ F；
Double active bridging parallel operation resonant capacitance Cr2: 90 μ F；
High frequency transformer leakage inductance Lres: 62.5 μ H；
Resonance frequency f:5kHz；
Double active bridging parallel operations export lateral capacitance C2':4mF；
Double active bridging parallel operation outlet side voltage rating Udc: 750V；
High-frequency transformer coils resistance Rloss: 65m Ω；
Triangular carrier frequency: 800Hz；
Cascaded H-bridges converter modulation system: carrier phase
Load resistance RL: 1.125 Ω
Fig. 3 is the composition schematic diagram of the big signal simulation model embodiment of Monophase electric power electronic transformer of the invention.Such as Fig. 3
Shown, the big signal simulation model 10 of the Monophase electric power electronic transformer of the present embodiment includes: the equivalent big signal of cascaded H-bridges converter
Model 11 and the equivalent large-signal model 12 of double active bridging parallel operations and Double closed-loop of voltage and current model being attached thereto
13。
Wherein, the equivalent large-signal model 11 of cascaded H-bridges converter is used to simulate N number of H in Monophase electric power electronic transformer
Bridging parallel operation；What double equivalent large-signal models 12 of active bridging parallel operation were used to simulate in Monophase electric power electronic transformer N number of double has
Source bridging parallel operation；Double closed-loop of voltage and current model 13 is used to simulate the Double closed-loop of voltage and current system of H bridging parallel operation.
Fig. 4 is the present embodiment cascade equivalent large-signal model of H bridging parallel operation and double active equivalent big signals of bridging parallel operation
The composition schematic diagram of model.
As shown in figure 4, the equivalent large-signal model of the present embodiment cascade H bridging parallel operation includes: cascaded H-bridges converter mould
Block, the first controlled voltage source H1, the first controlled current source S1With Support Capacitor C1。
Cascaded H-bridges converter module includes: 4 input signal ug、ig、UC1, N and 4 output terminal a1、b1、c1、d1。
ugFor the alternating voltage reference signal of collected Double closed-loop of voltage and current model output, igIt is collected
Current on line side signal, U in the simulation modelC1For collected Support Capacitor C1Voltage signal, N be Monophase electric power electronic transformer
Device concatenated power module number.
a1、b1Respectively with the first controlled voltage source H1Positive and negative electrode control terminal connection；c1、d1Respectively with the first controlled electricity
Stream source S1Positive and negative electrode control terminal connection；First controlled voltage source H1Two voltage terminals connect power grid；First controlled electricity
Stream source S1Positive and negative electrode output terminal respectively with Support Capacitor C1Positive and negative electrode connection.
Specifically, Support Capacitor C can be calculated according to formula (1)1Value:
C1=C1′ (1)
Wherein, C1' for H bridging parallel operation single in Monophase electric power electronic transformer outlet side parallel connection Support Capacitor, root
According to the parameter in the present embodiment, C can be obtained1=2mF；
Specifically, the output terminal a of cascaded H-bridges converter module can be calculated according to formula (2)1、b1The voltage control of output
Signal processed:
uab1=ug (2)
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output.
Specifically, the output terminal c of cascaded H-bridges converter module can be calculated according to formula (3)1、d1The electric current control of output
Signal processed:
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output, igFor in the collected simulation model
Current on line side signal, N are Monophase electric power electronic transformer concatenated power module number, UC1To be propped up in the collected simulation model
Support capacitor C1Voltage signal.
As shown in figure 4, double active equivalent large-signal models of bridging parallel operation include: double active bridging parallel operation moulds in the present embodiment
Block, equivalent resistance Req, equivalent inductance Leq, output lateral capacitance C2, the second controlled voltage source H2With the second controlled current source S2。
Double active bridge converter modules include 4 input signal Icur、Udc, k, N and 4 output terminal a2、b2、c2、
d2。
UdcFor collected output lateral capacitance C2The d. c. voltage signal at both ends, IcurEquivalent resistance is flowed through to be collected
ReqCurrent signal, k is the former and deputy side electricity of single double active bridging parallel operation medium/high frequency transformers of Monophase electric power electronic transformer
Buckling ratio, N are Monophase electric power electronic transformer concatenated power module number.
a2、b2Respectively with the second controlled voltage source H2Positive and negative electrode control terminal connection；c2、d2Respectively with the second controlled electricity
Stream source S2Positive and negative electrode control terminal connection；Second controlled voltage source H2Cathode voltage terminal successively with equivalent resistance Req, etc.
Imitate inductance LeqAfter series connection, with Support Capacitor C1Anode connection；Second controlled voltage source H2Cathode voltage terminal and support electricity
Hold C1Cathode connection；Second controlled current source S2Positive and negative electrode output terminal respectively with output lateral capacitance C2Positive and negative electrode connect
It connects.
Specifically, N number of double active bridging parallel operations in Monophase electric power electronic transformer are calculated and export lateral capacitance C2' capacity it
With, as output lateral capacitance C2Value C can be obtained according to the parameter in the present embodiment2=24mF.
Specifically, equivalent resistance R can be calculated according to formula (4)eqValue:
Wherein, RlossIt is arrived for the high frequency transformer conversion in double active bridging parallel operations single in Monophase electric power electronic transformer
On high-tension side former and deputy side coil resistance.R can be obtained according to the parameter in the present embodimenteq=80m Ω.
Specifically, equivalent inductance L can be calculated according to formula (5)eqValue:
Wherein, LresFor by the high frequency transformer in active bridging parallel operations single double in the Monophase electric power electronic transformer
When vice-side winding short circuit, the inductance value that is measured at high frequency transformer primary side winding.It, can according to the parameter in the present embodiment
Obtain Leq=157 μ F.
Specifically, the output terminal a of double active bridge converter modules can be calculated according to formula (6)2、b2The voltage of output
Control signal:
Uab2=kUdc (6)
Wherein, k is the former and deputy side electricity of single double active bridging parallel operation medium/high frequency transformers of Monophase electric power electronic transformer
Buckling ratio, UdcTo export lateral capacitance C in the collected simulation model2The d. c. voltage signal at both ends.
Specifically, the output terminal c of double active bridge converter modules can be calculated according to formula (7)2、d2The electric current of output
Control signal:
Icd2=kNIcur (7)
Wherein, k is the former and deputy side electricity of single double active bridging parallel operation medium/high frequency transformers in Monophase electric power electronic transformer
Buckling ratio, N are Monophase electric power electronic transformer concatenated power module number, IcurTo be flowed through in the collected simulation model
Imitate resistance ReqCurrent signal.
The Double closed-loop of voltage and current model of the present embodiment is the emulation built according to actual circuit as shown in Figure 2
Circuit, element number and connection relationship are identical as Fig. 2 in artificial circuit.
Fig. 5 is to increase 500kW/1.125 Ω electricity suddenly by light condition in 0.3s using existing 1 pair of 1 simulation model
The exchange side voltage u emulated when resistance loadsa, ac-side current ig, Support Capacitor C1On voltage UC1With outlet side DC voltage
UdcWaveform.Fig. 6 is that the big signal simulation model of Monophase electric power electronic transformer is dashed forward in 0.3s by light condition in the present embodiment
The exchange side voltage u emulated when so increasing 500kW/1.125 Ω ohmic loadsa, ac-side current ig, Support Capacitor C1On electricity
Press UC1With outlet side DC voltage UdcWaveform.
By Fig. 5 and Fig. 6 it is found that the simulation result of the Monophase electric power electronic transformer large-signal model in the present embodiment and existing
There is simulation result of Monophase electric power electronic transformer simulation model when by shock load identical, the simulation step length of the two is
1 μ s, but under conditions of simulation time is 0.4s, when being emulated required for existing Monophase electric power electronic transformer simulation waveform
Between be 120s, and simulation time required for big signal simulation model proposed by the present invention is 50s.Therefore, with existing single-phase electricity
Power electronic transformer computer simulation model is compared, and Monophase electric power electronic transformer model proposed by the present invention being capable of Fast simulation
Port circuit characteristic of system when by big signal disturbance.
Those skilled in the art should be able to recognize that, and in conjunction with module disclosed herein, model, carry out appropriate point
Solution or combination, still are able to realize identical technical effect, but such implementation should not be considered as beyond the scope of the present invention.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (12)
1. a kind of big signal simulation model of Monophase electric power electronic transformer, the Monophase electric power electronic transformer includes N number of power
Module, each power module are made of H bridging parallel operation and double active bridging parallel operations；The input side of N number of H bridging parallel operation cascades, often
The outlet side of a H bridging parallel operation is parallel with Support Capacitor C1′；Each double active bridging parallel operations include to be become by capacitor and high frequency
The resonance circuit of depressor composition, the resonance circuit use open loop duty ratio to be controlled for 50% square-wave voltage；Each pair has
The outlet side of source bridging parallel operation is parallel with output lateral capacitance C2′；The outlet side of N number of double active bridging parallel operations is in parallel；
It is characterized in that, the simulation model includes: the equivalent large-signal model of cascaded H-bridges converter and is attached thereto double active
The equivalent large-signal model of bridging parallel operation；
The equivalent large-signal model of cascaded H-bridges converter is used to simulate N number of H bridging in the Monophase electric power electronic transformer
Parallel operation；
What double active equivalent large-signal model of bridging parallel operation was used to simulate in the Monophase electric power electronic transformer N number of double has
Source bridging parallel operation.
2. simulation model according to claim 1, which is characterized in that the Monophase electric power electronic transformer further include: electricity
Current voltage double closed-loop control system；
Correspondingly, the simulation model further include: Double closed-loop of voltage and current model；
The Double closed-loop of voltage and current model is for simulating the Double closed-loop of voltage and current system.
3. simulation model according to claim 2, which is characterized in that the equivalent large-signal model of cascaded H-bridges converter
It include: cascaded H-bridges converter module, the first controlled voltage source H1, the first controlled current source S1With Support Capacitor C1；
Wherein,
The cascaded H-bridges converter module includes: 4 input signal ug、ig、UC1, N and 4 output terminal a1、b1、c1、d1；
ugFor the alternating voltage reference signal of the collected Double closed-loop of voltage and current model output, igIt is collected
Current on line side signal, U in the simulation modelC1For the collected Support Capacitor C1Voltage signal, N be the single-phase electricity
Power electronic transformer concatenated power module number；
a1、b1Respectively with the first controlled voltage source H1Positive and negative electrode control terminal connection；c1、d1Respectively with described first by
Control current source S1Positive and negative electrode control terminal connection；
The first controlled voltage source H1Two voltage terminals connect power grid；The first controlled current source S1Positive and negative electrode it is defeated
Out terminal respectively with the Support Capacitor C1Positive and negative electrode connection.
4. simulation model according to claim 3, which is characterized in that double active equivalent large-signal models of bridging parallel operation
Include:
Double active bridge converter modules, equivalent resistance Req, equivalent inductance Leq, output lateral capacitance C2, the second controlled voltage source H2With
Second controlled current source S2；
Wherein,
Double active bridge converter modules include 4 input signal Icur、Udc, k, N and 4 output terminal a2、b2、c2、
d2；
UdcFor the collected output lateral capacitance C2The d. c. voltage signal at both ends, IcurFor it is collected flow through it is described equivalent
Resistance ReqCurrent signal, k is single double active bridging parallel operation medium/high frequency transformers of the Monophase electric power electronic transformer
Former and deputy polygonal voltage no-load voltage ratio, N are the Monophase electric power electronic transformer concatenated power module number；
a2、b2Respectively with the second controlled voltage source H2Positive and negative electrode control terminal connection；c2、d2Respectively with described second by
Control current source S2Positive and negative electrode control terminal connection；
The second controlled voltage source H2Cathode voltage terminal successively with the equivalent resistance Req, the equivalent inductance LeqSeries connection
Afterwards, with the Support Capacitor C1Anode connection；The second controlled voltage source H2Cathode voltage terminal and the Support Capacitor
C1Cathode connection；The second controlled current source S2Positive and negative electrode output terminal respectively with the output lateral capacitance C2Just,
Cathode connection.
5. simulation model according to claim 4, which is characterized in that the Support Capacitor C1Value are as follows:
C1=C1′
Wherein, C1' for H bridging parallel operation single in the Monophase electric power electronic transformer outlet side parallel connection Support Capacitor.
6. simulation model according to claim 5, which is characterized in that the output terminal of the cascaded H-bridges converter module
a1、b1The voltage control signal of output are as follows:
uab1=ug
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output.
7. simulation model according to claim 6, which is characterized in that the output terminal of the cascaded H-bridges converter module
c1、d1The current controling signal of output are as follows:
Wherein, ugFor the alternating voltage reference signal of double-closed-loop control model output, igFor the collected simulation model
Middle current on line side signal, N are the Monophase electric power electronic transformer concatenated power module number, UC1For the collected emulation
Support Capacitor C described in model1Voltage signal.
8. simulation model according to claim 7, which is characterized in that the output lateral capacitance C2Value be the single-phase electricity
N number of double active bridging parallel operations export lateral capacitance C in power electronic transformer2' the sum of capacity.
9. simulation model according to claim 8, which is characterized in that the equivalent resistance ReqValue are as follows:
Wherein, RlossIt is arrived for the high frequency transformer conversion in double active bridging parallel operations single in the Monophase electric power electronic transformer
On high-tension side former and deputy side coil resistance.
10. simulation model according to claim 9, which is characterized in that the equivalent inductance LeqValue are as follows:
Wherein, LresFor by the high frequency transformer pair side in active bridging parallel operations single double in the Monophase electric power electronic transformer
When winding short circuit, the inductance value that is measured at high frequency transformer primary side winding.
11. simulation model according to claim 10, which is characterized in that the output end of double active bridge converter modules
Sub- a2、b2The voltage control signal of output are as follows:
Uab2=kUdc
Wherein, k is the former and deputy side electricity of single double active bridging parallel operation medium/high frequency transformers of the Monophase electric power electronic transformer
Buckling ratio, UdcTo export lateral capacitance C described in the collected simulation model2The d. c. voltage signal at both ends.
12. simulation model according to claim 11, which is characterized in that the output end of double active bridge converter modules
Sub- c2、d2The current controling signal of output are as follows:
Icd2=kNIcur
Wherein, k is the former and deputy side electricity of single double active bridging parallel operation medium/high frequency transformers in the Monophase electric power electronic transformer
Buckling ratio, N are the Monophase electric power electronic transformer concatenated power module number, IcurFor in the collected simulation model
Flow through equivalent resistance ReqCurrent signal.
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