CN107330229A - A kind of pair of active full-bridge direct current converter fast simulation model - Google Patents

A kind of pair of active full-bridge direct current converter fast simulation model Download PDF

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Publication number
CN107330229A
CN107330229A CN201710647460.7A CN201710647460A CN107330229A CN 107330229 A CN107330229 A CN 107330229A CN 201710647460 A CN201710647460 A CN 201710647460A CN 107330229 A CN107330229 A CN 107330229A
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bridge
primary
lead
bridge modules
voltage source
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CN107330229B (en
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赵聪
李耀华
王平
李子欣
徐飞
高范强
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/30Circuit design
    • G06F30/36Circuit design at the analogue level
    • G06F30/367Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods

Abstract

A kind of pair of active full-bridge direct current converter fast simulation model, by primary side H bridge modules, secondary H bridge modules and 4 controlled voltage source S1, S2, S3, S4 compositions.Wherein primary side H bridge modules have 4 input signal Idc1, Iac1, SWp1, SWp2With 4 lead-out terminals a1, b1, c1, d1, secondary H bridge modules have 4 input signal Idc2, Iac2, SWs1, SWs2With 4 lead-out terminals a2, b2, c2, d2.Primary side H bridge modules and the first controlled voltage source S1, the second controlled voltage source S2 are equivalent to the primary side H bridges of double active full-bridge direct current converters, and secondary H bridge modules and the 3rd controlled voltage source S3, the 4th controlled voltage source S4 are equivalent to the secondary H bridges of double active full-bridge direct current converters.Described simulation model can realize the high-speed simulation of double active full-bridge direct current converters.

Description

A kind of pair of active full-bridge direct current converter fast simulation model
Technical field
The present invention relates to a kind of pair of active full-bridge direct current converter fast simulation model.
Background technology
In recent years, construction was continued to develop with extra-high voltage grid and town and country power distribution network, the power network of China will be stepped comprehensively Enter intellectualization times.In order to provide the user with electric power resource more economical, stably, environmentally friendly, and also to ensure power network Flexibly with it is controllable, following intelligent grid it is also proposed harsh requirement to indexs such as reliability, the intellectualities of electrical equipment.Electric power Electronic transformer exactly arises at the historic moment in this context.
It is used as the core parts of electric power electric transformer --- double active full-bridge direct current converters, the quality of its performance will be straight Connect the performance for determining electric power electric transformer.Moreover, double active full-bridge direct current converters can also realize the two-way of power Flowing and Sofe Switch, compared to other converters, suffer from larger advantage and flexibility in efficiency and control.
But with the raising of double active full-bridge direct current converter application scenario voltage class, generally require using multistage double main The structure of dynamic full-bridge direct current converter cascade could meet the demand of voltage class.Consequently, it is possible to whole system derailing switch number of packages Amount will be multiplied, and huge computational burden be brought to analogue system so that whole system simulation efficiency is substantially reduced.To hand over Exemplified by flowing side line voltage effective value for 10kV electric power electric transformer, under conditions of redundancy is not considered, rectification side is using every Individual bridge arm has the modularization multi-level converter of 10 submodules, and DC link is defeated using 16 grades of double active full-bridge direct current converters Enter series connection, output-parallel structure, whole system has 248 switching devices of needs altogether, and so huge circuit scale can make emulation Time greatly prolongs.
The problem of simulation time brought to solve huge Power Electronic Circuit extends, Patents it is also proposed difference Scheme.Chinese patent CN103593521A proposes the rapid simulation method of bridge-type modularization multi-level converter, the party Method has carried out equivalent for the circuit characteristic of bridge-type modularization multi-level converter under unblock and two kinds of operating modes of locking.It is Chinese special Sharp CN104953873A proposes a kind of rapid simulation method of mixed type module multilevel converter, and this method establishes the change of current Fast simulation model under the various workings such as startup, unblock and the locking of device.Above patent is to be directed to different types of module Change the high-speed simulation problem of multilevel converter, on the high-speed simulation problem of double active full-bridge direct current converters, current is special Profit also without reference to.
The content of the invention
The purpose of the present invention is the shortcoming for overcoming prior art, proposes a kind of pair of active full-bridge direct current converter high-speed simulation Model.The high-speed simulation under double active full-bridge direct current converter multiple control modes can be achieved in the present invention.
Double active full-bridge direct current converter fast simulation models of the present invention are by primary side H bridge modules, secondary H bridge modules and 4 Individual controlled voltage source S1, S2, S3, S4 are constituted.Primary side H bridge modules have 4 input signal Idc1, Iac1, SWp1, SWp2With 4 outputs Terminal a1, b1, c1, d1, secondary H bridge modules have 4 input signal Idc2, Iac2, SWs1, SWs2With 4 lead-out terminals a2, b2, C2, d2.Wherein, primary side H bridge modules input signal Idc1And Iac1The respectively DC current and ac current signal of primary side H bridges, Positive poles of the lead-out terminal a1 and b1 of primary side H bridge modules respectively with the first controlled voltage source S1 is connected with negative pole, primary side H bridge modules Positive pole respectively with the second controlled voltage source S2 of lead-out terminal c1 and d1 be connected with negative pole.Secondary H bridge module input signals Idc2 And Iac2The respectively DC current and ac current signal of secondary H bridges.The lead-out terminal a2 and b2 of secondary H bridge modules respectively with 3rd controlled voltage source S3 positive pole is connected with negative pole, the lead-out terminal c2 and d2 of secondary H bridge modules respectively with the 4th controlled electricity Potential source S4 positive pole is connected with negative pole.It is containing inductance, electric capacity between second controlled voltage source S2 and the 3rd controlled voltage source S3 With the resonance circuit of high frequency transformer.
Double active full-bridge direct current converter cores in double active full-bridge direct current converter fast simulation models of the invention Point --- H bridges equivalent model is using programming language foundation, when solving the emulation caused due to non-linear elements such as switching devices Between it is long the problem of, simulation efficiency can be greatly improved.In H bridge equivalent models, primary side H bridge modules and the first controlled voltage source S1, Second controlled voltage source S2 is equivalent to the primary side H bridges of double active full-bridge direct current converters, secondary H bridge modules and the 3rd controlled voltage Source S3, the 4th controlled voltage source S4 are equivalent to the secondary H bridges of double active full-bridge direct current converters.
The former secondary of double active full-bridge direct current converter fast simulation models of the present invention is symmetrical, below with primary side H bridge moulds Its simulation process is illustrated exemplified by block, is comprised the steps of:
(1) according to the switching signal SW of primary side H bridge modulesp1And SWp2Calculate the electric current for flowing through the first controlled voltage source S1 Ic1, work as SWp1=1, SWp2When=0, Ic1=Idc1-Iac1;Work as SWp1=0, SWp2When=1, Ic1=Idc1+Iac1;Work as SWp1=1, SWp2When=1, Ic1=Idc1;Work as SWp1=0, SWp2When=0, Ic1=Idc1
(2) voltage between the lead-out terminal a1 and lead-out terminal b1 of primary side H bridge modules is calculated according to following formula Arrive:
Wherein, Uab(k) it is the voltage between k-th of controlling cycle lead-out terminal a1 and lead-out terminal b1, Uab(k-1) For the voltage between (k-1) individual controlling cycle lead-out terminal a1 and lead-out terminal b1, k is any positive integer, and C is primary side H The first controlled voltage source of bridge S1 equivalent capacity, Ic1Flow through the first controlled voltage source S1's for what is obtained according to step (1) calculating Electric current.
(3) voltage between primary side H bridge modules lead-out terminal c1 and lead-out terminal d1 is calculated according to following formula and obtained
Ucd(k)=(SWp1-SWp2)Uab(k) (2)
Wherein, Ucd(k) it is the voltage between k-th of controlling cycle lead-out terminal c1 and lead-out terminal d1, k is arbitrarily just Integer.
The simulation process of the secondary H bridge modules of described double active full-bridge direct current converter fast simulation models and primary side H Bridge module is identical.
Brief description of the drawings
Fig. 1 is existing pair of active full-bridge direct current converter circuit topology;
Fig. 2 is proposed by the present invention pair of active full-bridge direct current converter fast simulation model block diagram;
Fig. 3 is the voltage current waveform using existing pair of active full-bridge direct current converter emulation;
Fig. 4 is the voltage current waveform of double active full-bridge direct current converter fast simulation models using the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is existing pair of active full-bridge direct current converter circuit topology.This pair of active full-bridge direct current converter is by primary side H Bridge and secondary H bridges composition, each H bridges contain 4 switching devices.The exchange link of former secondary H bridges be containing high frequency transformer and The resonance circuit of electric capacity.
Fig. 2 is double active full-bridge direct current converter fast simulation model block diagrams of the invention.The simulation model is by primary side H bridges Module, secondary H bridge modules and 4 controlled voltage source S1, S2, S3, S4 compositions.Primary side H bridge modules have 4 input signal Idc1, Iac1, SWp1, SWp2With 4 lead-out terminals a1, b1, c1, d1, secondary H bridge modules have 4 input signal Idc2, Iac2, SWs1, SWs2 With 4 lead-out terminals a2, b2, c2, d2.Wherein, Idc1And Iac1The respectively DC current and ac current signal of primary side H bridges, Positive poles of the lead-out terminal a1 and b1 of primary side H bridge modules respectively with the first controlled voltage source S1 is connected with negative pole, primary side H bridge modules Positive pole respectively with the second controlled voltage source S2 of lead-out terminal c1 and d1 be connected with negative pole.Idc2And Iac2Respectively secondary H bridges DC current and ac current signal.The lead-out terminal a2 and b2 of secondary H bridge modules are respectively with the 3rd controlled voltage source S3's Positive pole is connected with negative pole, the positive pole and negative pole of the lead-out terminal c2 and d2 of secondary H bridge modules respectively with the 4th controlled voltage source S4 Connection.It is the resonance containing inductance, electric capacity and high frequency transformer between second controlled voltage source S2 and the 3rd controlled voltage source S3 Circuit.
Primary side H bridge modules and the first controlled voltage source S1, the second controlled voltage source S2 are equivalent to double active full-bridge direct currents and become The primary side H bridges of parallel operation, secondary H bridge modules and the 3rd controlled voltage source S3, the 4th controlled voltage source S4 are equivalent to double active full-bridges The secondary H bridges of DC converter.
It is one embodiment of the present of invention below.
Double active full-bridge direct current converter parameters are as follows in the present embodiment:
Fig. 3 is the voltage current waveform using existing pair of active full-bridge direct current converter emulation.It is respectively from top to bottom High frequency transformer primary and secondary side electric current, high frequency transformer primary and secondary side voltage and high frequency transformer original edge voltage, electric current Waveform.
Double active full-bridge direct current converter simulation processes of the present invention are as follows:
(1) according to the switching signal SW of primary side H bridge modulesp1And SWp2Calculate the electric current for flowing through the first controlled voltage source S1 Ic1, work as SWp1=1, SWp2When=0, Ic1=Idc1-Iac1;Work as SWp1=0, SWp2When=1, Ic1=Idc1+Iac1;Work as SWp1=1, SWp2When=1, Ic1=Idc1;Work as SWp1=0, SWp2When=0, Ic1=Idc1
(2) voltage between primary side H bridge modules lead-out terminal a1 and lead-out terminal b1 is calculated according to following formula and obtained:
Wherein, Uab(k) it is the voltage between k-th of controlling cycle lead-out terminal a1 and lead-out terminal b1, Uab(k-1) For the voltage between (k-1) individual controlling cycle lead-out terminal a1 and lead-out terminal b1, k is any positive integer, and C is primary side H Bridge first voltage source S1 equivalent capacity, Ic1To calculate obtained electric current according to step (1).
(3) voltage between primary side H bridge modules lead-out terminal c1 and lead-out terminal d1 is calculated according to following formula and obtained:
Ucd(k)=(SW1-SW2)Uab(k) (2)
Wherein, Ucd(k) it is the voltage between k-th of controlling cycle lead-out terminal c1 and lead-out terminal d1, k is arbitrarily just Integer.
The simulation process of this pair of active full-bridge direct current converter fast simulation model secondary H bridge module and primary side H bridge modules It is identical.
Fig. 4 is the voltage current waveform of double active full-bridge direct current converter fast simulation models using the present invention.From upper And lower is respectively high frequency transformer primary and secondary side electric current, high frequency transformer primary and secondary side voltage and high frequency transformer primary side Voltage, current waveform.From Fig. 3 and Fig. 4, obtained using double active full-bridge direct current converter fast simulation models of the present invention Simulation result it is identical with the simulation result of existing pair of active full-bridge direct current converter, and simulation step length be 1 μ s, during emulation Between be 0.5s in the case of, obtaining the simulation result shown in Fig. 3 needs 50s, obtains the simulation result shown in Fig. 4 and only needs to 22s. Therefore, double active full-bridge direct current converter fast simulation models of the invention can either accurately reflect double active full-bridge direct current conversion The circuit characteristic of device, can shorten simulation time again, improve simulation efficiency.

Claims (5)

1. a kind of pair of active full-bridge direct current converter fast simulation model, it is characterised in that:Described fast simulation model is by original Side H bridge modules, secondary H bridge modules and 4 controlled voltage source S1, S2, S3, S4 compositions;Primary side H bridge modules have 4 input signals Idc1, Iac1, SWp1, SWp2With 4 lead-out terminals a1, b1, c1, d1, secondary H bridge modules have 4 input signal Idc2, Iac2, SWs1, SWs2With 4 lead-out terminals a2, b2, c2, d2;Wherein, the input signal I of primary side H bridge modulesdc1For the DC current of primary side H bridges Signal, the input signal I of primary side H bridge modulesac1For the ac current signal of primary side H bridges;The input signal SW of primary side H bridge modulesp1 And SWp2For the switching signal of primary side H bridges;The lead-out terminal a1 of primary side H bridge modules is connected with the first controlled voltage source S1 positive pole, The lead-out terminal b1 of primary side H bridge modules is connected with the first controlled voltage source S1 negative pole;The lead-out terminal c1 of primary side H bridge modules with Second controlled voltage source S2 positive pole connection, the lead-out terminal d1 of primary side H bridge modules and the second controlled voltage source S2 negative pole connect Connect;The input signal I of secondary H bridge modulesdc2For the DC current signal of secondary H bridges, the input signal I of secondary H bridge modulesac2For The ac current signal of secondary H bridges;The input signal SW of secondary H bridge moduless1, SWs2For the switching signal of secondary H bridges;Secondary H The lead-out terminal a2 of bridge module is connected with the 3rd controlled voltage source S3 positive pole, the lead-out terminal b2 and the 3rd of secondary H bridge modules Controlled voltage source S3 negative pole connection, the lead-out terminal c2 of secondary H bridge modules is connected with the 4th controlled voltage source S4 positive pole, secondary The lead-out terminal d2 of side H bridge modules is connected with the 4th controlled voltage source S4 negative pole;Second controlled voltage source S2 and the 3rd is controlled It is the resonance circuit containing inductance, electric capacity and high frequency transformer between voltage source S3.
2. double active full-bridge direct current converter fast simulation models as claimed in claim 1, it is characterised in that:Double active full-bridges DC converter core --- it is primary side H bridge modules and the first controlled voltage source S1, second controlled in the equivalent model of H bridges Voltage source S2 is equivalent to the primary side H bridges of double active full-bridge direct current converters, secondary H bridge modules and the 3rd controlled voltage source S3, the Four controlled voltage source S4 are equivalent to the secondary H bridges of double active full-bridge direct current converters.
3. double active full-bridge direct current converter fast simulation models as claimed in claim 1, it is characterised in that:Described second It is the resonance circuit containing electric capacity and high frequency transformer between controlled voltage source S2 and the 3rd controlled voltage source S3.
4. double active full-bridge direct current converter fast simulation models as claimed in claim 1 or 2, it is characterised in that:Utilize survey The ac current signal I of the primary side H bridge modules measuredac1, DC current signal Idc1And switching signal SWp1、SWp2, calculate former The output voltage of side H bridge modules, realizes that circuit characteristic is emulated using programming language;The simulation process of primary side H bridge modules include with Lower step:
(1) according to primary side H bridge module switching signals SWp1And SWp2Calculate the electric current I for flowing through the first controlled voltage source S1c1, work as SWp1 =1, SWp2When=0, Ic1=Idc1-Iac1;Work as SWp1=0, SWp2When=1, Ic1=Idc1+Iac1;Work as SWp1=1, SWp2When=1, Ic1=Idc1;Work as SWp1=0, SWp2When=0, Ic1=Idc1
(2) voltage between primary side H bridge modules lead-out terminal a1 and lead-out terminal b1 is calculated according to following formula and obtained:
<mrow> <msub> <mi>U</mi> <mrow> <mi>a</mi> <mi>b</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <msub> <mi>U</mi> <mrow> <mi>a</mi> <mi>b</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>+</mo> <mfrac> <mn>1</mn> <mi>C</mi> </mfrac> <mo>&amp;Integral;</mo> <msub> <mi>I</mi> <mrow> <mi>c</mi> <mn>1</mn> </mrow> </msub> <mi>d</mi> <mi>t</mi> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>
Wherein, Uab(k) it is the voltage between k-th controlling cycle primary side H bridge module lead-out terminal a1 and lead-out terminal b1, Uab (k-1) it is the voltage between (k-1) individual controlling cycle primary side H bridge modules lead-out terminal a1 and lead-out terminal b1, k is any Positive integer, C is the first controlled voltage source S1 equivalent capacity, Ic1To calculate obtained electric current according to step (1);
(3) voltage between primary side H bridge modules lead-out terminal c1 and lead-out terminal d1 is calculated according to following formula and obtained:
Ucd(k)=(SW1-SW2)Uab(k) (2)
Wherein, Ucd(k) it is the voltage between k-th controlling cycle primary side H bridge module lead-out terminal c1 and lead-out terminal d1, k For any positive integer.
5. double active full-bridge direct current converter fast simulation models as claimed in claim 1 or 2, it is characterised in that:Utilize survey The ac current signal I of the secondary H bridge modules measuredac2, DC current signal Idc2And switching signal SWs1、SWs2, meter Calculate the output voltage of secondary H bridge modules;The simulation process and step of secondary H bridge modules are identical with primary side H bridge modules.
CN201710647460.7A 2017-08-01 2017-08-01 Quick simulation system of double-active full-bridge direct-current converter Active CN107330229B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110071649A (en) * 2019-05-30 2019-07-30 中国科学院电工研究所 Cascade H bridge type electric power electric transformer power module electromagnetic transient simulation model

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120120683A1 (en) * 2010-11-17 2012-05-17 Acbel Polytech Inc. Full bridge phase shifted power supply with synchronous rectification and current doubler and method for dynamically adjusting delay parameters thereof
CN103516224A (en) * 2013-10-09 2014-01-15 清华大学 Mixed phase-shifting control method used for dually-active full-bridge direct current converter
CN103617315A (en) * 2013-11-20 2014-03-05 合肥工业大学 Modeling method on basis of effective duty cycle for phase-shifted full-bridge ZVS (zero voltage switching) converter
CN104467434A (en) * 2014-11-21 2015-03-25 清华大学 Transient state phase-shifting control method for double-drive full-bridge DC/DC converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120120683A1 (en) * 2010-11-17 2012-05-17 Acbel Polytech Inc. Full bridge phase shifted power supply with synchronous rectification and current doubler and method for dynamically adjusting delay parameters thereof
CN103516224A (en) * 2013-10-09 2014-01-15 清华大学 Mixed phase-shifting control method used for dually-active full-bridge direct current converter
CN103617315A (en) * 2013-11-20 2014-03-05 合肥工业大学 Modeling method on basis of effective duty cycle for phase-shifted full-bridge ZVS (zero voltage switching) converter
CN104467434A (en) * 2014-11-21 2015-03-25 清华大学 Transient state phase-shifting control method for double-drive full-bridge DC/DC converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110071649A (en) * 2019-05-30 2019-07-30 中国科学院电工研究所 Cascade H bridge type electric power electric transformer power module electromagnetic transient simulation model
CN110071649B (en) * 2019-05-30 2020-07-31 中国科学院电工研究所 Electromagnetic transient simulation system for power module of cascaded H-bridge type power electronic transformer

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