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CN111525812B - Design method of direct-current voltage conversion circuit of energy router - Google Patents

Design method of direct-current voltage conversion circuit of energy router Download PDF

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CN111525812B
CN111525812B CN202010404724.8A CN202010404724A CN111525812B CN 111525812 B CN111525812 B CN 111525812B CN 202010404724 A CN202010404724 A CN 202010404724A CN 111525812 B CN111525812 B CN 111525812B
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voltage conversion
conversion circuit
phase
energy router
full bridge
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CN111525812A (en
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李国杰
童安平
汪可友
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State Grid Shanghai Electric Power Co Ltd
Shanghai Jiao Tong University
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State Grid Shanghai Electric Power Co Ltd
Shanghai Jiao Tong University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/3353—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A design method of an energy router direct-current voltage conversion circuit is helpful for revealing the physical essence of an energy router direct-current voltage conversion-double-active-bridge converter, and is convenient for carrying out comprehensive derivation, analysis and simplification on control-output dynamics of different working modes, so that complicated numerical calculation required by control is avoided. The direct-current voltage conversion circuit designed by the invention is suitable for the direct-current voltage conversion circuit of the energy router based on the expansion phase-shift modulation, the single phase-shift modulation, the double phase-shift modulation and the triple phase-shift modulation. The method has the advantages of simple calculation, high model precision and easy practical engineering application, greatly improves the design efficiency of the direct-current voltage conversion of the energy router, reduces the current loss and improves the direct-current voltage conversion efficiency.

Description

能源路由器直流电压转换电路的设计方法Design method of DC voltage conversion circuit of energy router

技术领域technical field

本发明涉及能源路由器直流电压转换电路，特别是一种能源路由器直流电压转换电路的设计方法。The invention relates to a direct current voltage conversion circuit of an energy router, in particular to a design method of a direct current voltage conversion circuit of an energy router.

背景技术Background technique

随着电力电子技术的发展，高频隔离功率转换技术将越来越多的应用到电网中，成为实现电网中快速灵活控制的重要手段。基于移相调制技术的能源路由器直流电压转换单元，即双有源全桥(Dual Active Bridge，简称为DAB)变换器具有功率密度高、动态响应快、容易实现软开关、功率能双向流动等优点，在不间断电源、电动汽车、固态变压器等场合广受欢迎。常见的DAB变换器调制方式为移相调制，在高频变压器的原边端口和副边端口产生具有相对相移的电压方波，同时通过控制原边和副边两个全桥电路斜对角开关器件驱动的相对相移，改变电压方波的占空比，从而调节流经变换器的功率。根据控制变量的选择，常见的DAB变换器的调制方式有：单移相调制(Single phase shift modulation,SPSM)、双重移相调制(Dual phase shift modulation,DPSM)、扩展移相调制(Extended phaseshift modulation,EPSM)和三重移相调制(Triple phase shift modulation,TPSM)等。其中扩展移相调制具有功率密度高、动态响应快、容易实现软开关、原副边电气隔离、功率能双向流动等优点，在不间断电源、电动汽车、固态变压器等场合广受欢迎。With the development of power electronic technology, high-frequency isolated power conversion technology will be more and more applied to the power grid, becoming an important means to realize fast and flexible control in the power grid. The DC voltage conversion unit of the energy router based on the phase-shift modulation technology, that is, the Dual Active Bridge (DAB) converter has the advantages of high power density, fast dynamic response, easy soft switching, and bidirectional flow of power. , widely popular in uninterruptible power supplies, electric vehicles, solid-state transformers and other occasions. The common modulation method of DAB converter is phase-shift modulation, which generates a voltage square wave with relative phase shift at the primary port and the secondary port of the high-frequency transformer. The relative phase shift of the switching device drive changes the duty cycle of the voltage square wave, thereby regulating the power flowing through the converter. According to the selection of control variables, the common modulation methods of DAB converters are: single phase shift modulation (SPSM), dual phase shift modulation (DPSM), extended phase shift modulation (Extended phase shift modulation) , EPSM) and triple phase shift modulation (Triple phase shift modulation, TPSM) and so on. Among them, extended phase-shift modulation has the advantages of high power density, fast dynamic response, easy implementation of soft switching, electrical isolation of primary and secondary sides, and bidirectional flow of power.

然而，对于能源路由器直流电压转换电路而言，由于控制变量多，设计非常复杂，如何为研发、设计工程师提供一个直观的设计方法，提高设计效率，是实现其优化、高效运行的关键。However, for the DC voltage conversion circuit of energy routers, due to the many control variables, the design is very complicated. How to provide an intuitive design method for R&D and design engineers to improve the design efficiency is the key to achieve its optimization and efficient operation.

发明内容SUMMARY OF THE INVENTION

针对上述问题，本发明的目的是提供一种能源路由器直流电压转换电路的设计方法。该方法建立其等效电路，将数学模型和电路模型进行统一，揭示了能源路由器直流电压转换单元的物理本质，易于实际应用。In view of the above problems, the purpose of the present invention is to provide a design method of a DC voltage conversion circuit of an energy router. The method establishes its equivalent circuit, unifies the mathematical model and the circuit model, reveals the physical nature of the DC voltage conversion unit of the energy router, and is easy to apply in practice.

本发明的技术解决方案如下：The technical solution of the present invention is as follows:

一种能源路由器直流电压转换电路的设计方法，该方法包括下列步骤：A design method for a DC voltage conversion circuit of an energy router, the method comprising the following steps:

1)绘制能源路由器直流电压转换电路图1) Draw the DC voltage conversion circuit diagram of the energy router

所述的能源路由器直流电压转换电路由输入直流电压源vin、原边单相全桥H1、副边单相全桥H2、高频隔离变压器、高频电感Ls和等效电路组成，所述的原边单相全桥H1的4个全控开关器件为S1～S4，副边单相全桥H2的四个全控开关器件为Q1～Q4；所述的原边单相全桥的直流母线的正极与对应直流电压源的正极相连，原边单相全桥的直流母线的负极与对应的直流电压源的负极相连，原边单相全桥的交流侧通过高频电感Ls与所述的高频隔离变压器的原边相连；所述的副边单相全桥的直流母线正极与对应直流负载的正极相连，副边单相全桥的直流母线的负极与对应的直流负载的负极相连，副边单相全桥的交流侧与高频隔离变压器副边相连，所述的高频隔离变压器的变比为n:1；The DC voltage conversion circuit of the energy router is composed of the input DC voltage source v in , the primary side single-phase full bridge H 1 , the secondary side single phase full bridge H 2 , a high frequency isolation transformer, a high frequency inductor L s and an equivalent circuit , the four fully-controlled switching devices of the primary-side single-phase full - bridge H1 are S1 - S4, and the four fully-controlled switching devices of the secondary-side single-phase full-bridge H2 are Q1 - Q4 ; The positive pole of the DC bus of the primary side single-phase full bridge is connected to the positive pole of the corresponding DC voltage source, and the negative pole of the DC bus of the primary side single-phase full bridge is connected to the negative pole of the corresponding DC voltage source. The side is connected to the primary side of the high-frequency isolation transformer through the high-frequency inductance L s ; the positive pole of the DC bus bar of the secondary side single-phase full bridge is connected to the positive pole of the corresponding DC load, and the DC bus bar of the secondary side single-phase full bridge The negative pole is connected to the negative pole of the corresponding DC load, and the AC side of the secondary side single-phase full bridge is connected to the secondary side of the high-frequency isolation transformer, and the transformation ratio of the high-frequency isolation transformer is n:1;

2)绘制能源路由器直流电压转换电路的等效电路：2) Draw the equivalent circuit of the DC voltage conversion circuit of the energy router:

所述的等效电路包括电压源vin、vl,v2、vo,v3，电流源iin,v1、iin,v2、io,v1、il,i3，以及无源Ls、Res、Co、RL；其中，输入等效电路由vin、iin,v1、iin,v2并联构成；输出等效电路由io,v1、il,i3、Co、RL并联构成；辅助扰动传播路径等效电路由vl,v2、vo,v3、Ls、Res串联组成；The equivalent circuit includes voltage sources v in , v l,v2 , v o,v3 , current sources i in,v1 , i in,v2 , i o,v1 , i l,i3 , and passive L s , R es , C o , R L ; wherein, the input equivalent circuit is composed of v in , i in,v1 , i in, v2 in parallel; the output equivalent circuit is composed of i o,v1 , i l,i3 , C o , R L is formed in parallel; the equivalent circuit of the auxiliary disturbance propagation path is composed of v l,v2 , v o,v3 , L s , and R es in series;

上述等效电路中，vin为能源路由器直流电压转换电路输入直流电压源，vo为输出电压；iL为高频变压器原边电流；In the above equivalent circuit, v in is the input DC voltage source of the energy router DC voltage conversion circuit, v o is the output voltage; i L is the primary current of the high-frequency transformer;

3)通过下列关系式确定所述的能源路由器直流电压转换电路各元部件的参数：3) Determine the parameters of each component of the DC voltage conversion circuit of the energy router through the following relational expressions:

所述的能源路由器直流电压转换电路有2种工作模式：The energy router DC voltage conversion circuit has 2 working modes:

模式1(0≤D1≤D0≤1)和模式2(0≤D0≤D1≤1)，其中D0是原边单相全桥H1与副边单相全桥H2之间的移相占空比，D1是原边单相全桥H1两桥臂之间的移相占空比，副边单相全桥H2两桥臂之间的移相占空比D2维持在0.5；Mode 1 (0≤D 1 ≤D 0 ≤1) and Mode 2 (0≤D 0 ≤D 1 ≤1), where D 0 is the one between the primary side single-phase full bridge H 1 and the secondary side single-phase full bridge H 2 The phase-shift duty cycle between the two, D 1 is the phase-shift duty cycle between the two bridge arms of the primary side single-phase full-bridge H 1 , and the phase-shift duty cycle between the two bridge arms of the secondary side single-phase full-bridge H 2 D2 remains at 0.5 ;

上述等效电路中，其iin,v1、iin,v2、io,v1、il,i3、vl,v2、vo,v3与vin、vo、iL之间的关系如下：In the above equivalent circuit, the relationship between i in,v1 , i in,v2 , i o,v1 , i l,i3 , v l,v2 , v o,v3 and v in , v o , i L is as follows :

Figure BDA0002490871000000021
Figure BDA0002490871000000021

Figure BDA0002490871000000022
Figure BDA0002490871000000022

Figure BDA0002490871000000023
Figure BDA0002490871000000023

Figure BDA0002490871000000024
Figure BDA0002490871000000024

Figure BDA0002490871000000025
Figure BDA0002490871000000025

Figure BDA0002490871000000026
Figure BDA0002490871000000026

其中，Ls是高频变压器的漏感和等效电路中的电感值，T为二分之一开关周期，其与开关频率fs之间满足2T×fs＝1；Among them, L s is the leakage inductance of the high-frequency transformer and the inductance value in the equivalent circuit, T is one-half of the switching period, and the relationship between it and the switching frequency f s satisfies 2T×f s =1;

模式1下，扩展移相调制双有源桥变换器状态方程如下：In mode 1, the state equation of the extended phase-shift modulation dual active bridge converter is as follows:

Figure BDA0002490871000000031
Figure BDA0002490871000000031

上述式子中，[iL,vo]T是状态变量，AM1,j与BM1,j是模式1下的状态矩阵，下标j＝1～6，表示对应的第j个子状态；In the above formula, [i L , v o ] T is the state variable, A M1,j and B M1,j are the state matrix in mode 1, and the subscript j=1～6 represents the corresponding jth sub-state;

Figure BDA0002490871000000032
Figure BDA0002490871000000032

Figure BDA0002490871000000033
Figure BDA0002490871000000033

Figure BDA0002490871000000034
Figure BDA0002490871000000034

Figure BDA0002490871000000035
Figure BDA0002490871000000035

Figure BDA0002490871000000036
Figure BDA0002490871000000036

模式2下，能源路由器直流电压转换电路状态方程如下：In mode 2, the state equation of the DC voltage conversion circuit of the energy router is as follows:

Figure BDA0002490871000000037
Figure BDA0002490871000000037

其中，AM2,j与BM2,j是模式2下的状态矩阵，下标j＝1～6；Among them, A M2,j and B M2,j are the state matrix in mode 2, and the subscript j=1～6;

Figure BDA0002490871000000038
Figure BDA0002490871000000038

Figure BDA0002490871000000039
Figure BDA0002490871000000039

Figure BDA00024908710000000310
Figure BDA00024908710000000310

Figure BDA0002490871000000041
Figure BDA0002490871000000041

Figure BDA0002490871000000042
Figure BDA0002490871000000042

4)将选定的元部件按所述的直流电压转换电路安装即可。4) Install the selected components according to the described DC voltage conversion circuit.

所述的直流电压转换电路，适用于基于扩展移相调制、单移相调制、双重移相调制和三重移相调制的能源路由器的直流电压转换电路。The DC voltage conversion circuit is suitable for the DC voltage conversion circuit of energy routers based on extended phase-shift modulation, single-phase-shift modulation, double-phase-shift modulation and triple-phase-shift modulation.

与现有技术相比，本发明的特点如下：Compared with the prior art, the characteristics of the present invention are as follows:

1.本发明直流电压转换电路，适用于基于扩展移相调制、单移相调制、双重移相调制和三重移相调制的能源路由器的直流电压转换电路。1. The DC voltage conversion circuit of the present invention is suitable for the DC voltage conversion circuit of energy routers based on extended phase shift modulation, single phase shift modulation, double phase shift modulation and triple phase shift modulation.

2.便于工程设计、实施，大大提高了设计效率。2. It is convenient for engineering design and implementation, which greatly improves the design efficiency.

3.减少了电流损耗，提高了直流电压转换效率。3. Reduce the current loss and improve the DC voltage conversion efficiency.

附图说明Description of drawings

图1是本发明能源路由器直流电压转换电路的系统拓扑与等效电路图。FIG. 1 is a system topology and an equivalent circuit diagram of an energy router DC voltage conversion circuit of the present invention.

图2是本发明能源路由器直流电压转换电路模式1下等效电路的控制框图。FIG. 2 is a control block diagram of the equivalent circuit of the energy router DC voltage conversion circuit mode 1 of the present invention.

图3是本发明能源路由器直流电压转换电路模式2下等效电路的控制框图。FIG. 3 is a control block diagram of the equivalent circuit of the energy router DC voltage conversion circuit mode 2 of the present invention.

具体实施方式Detailed ways

下面结合实施例和附图对本发明作进一步说明，但不应以此限制本发明的保护范围。The present invention will be further described below with reference to the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited by this.

先请参阅图1，图1是本发明能源路由器直流电压转换的系统拓扑等效电路图，为设计人员提供了1个直观的扩展移相调制的能源路由器直流电压转换的等效模型，便于设计，该模型适用于变换器整个工作范围，在0～1范围内可任意给定D0和D1。Please refer to FIG. 1 first. FIG. 1 is the system topology equivalent circuit diagram of the DC voltage conversion of the energy router of the present invention, which provides designers with an intuitive equivalent model of the DC voltage conversion of the energy router with extended phase-shift modulation, which is convenient for design. This model is suitable for the entire working range of the converter, and D 0 and D 1 can be arbitrarily given in the range of 0-1.

一种能源路由器直流电压转换电路的制备方法，该方法包括下列步骤：A preparation method of a DC voltage conversion circuit of an energy router, the method comprising the following steps:

1)绘制基于扩展移相调制能源路由器直流电压转换电路图1) Draw the DC voltage conversion circuit diagram of the energy router based on extended phase-shift modulation

本发明所述的能源路由器的直流电压转换电路(双有源桥变换器)由输入直流电压源vin、原边单相全桥H1、副边单相全桥H2、高频隔离变压器、高频电感Ls和等效电路组成，所述的原边单相全桥H1的4个全控开关器件为S1～S4，副边单相全桥H2的四个全控开关器件为Q1～Q4；所述的原边单相全桥的直流母线的正极与对应直流电压源的正极相连，原边单相全桥的直流母线的负极与对应的直流电压源的负极相连，原边单相全桥的交流侧通过高频电感Ls与所述的高频隔离变压器的原边相连；所述的副边单相全桥的直流母线正极与对应直流负载的正极相连，副边单相全桥的直流母线的负极与对应的直流负载的负极相连，副边单相全桥的交流侧与高频隔离变压器副边相连，所述的高频隔离变压器的变比为n:1；The DC voltage conversion circuit (dual active bridge converter) of the energy router according to the present invention is composed of an input DC voltage source v in , a primary side single-phase full bridge H 1 , a secondary side single phase full bridge H 2 , and a high-frequency isolation transformer , high-frequency inductor L s and an equivalent circuit, the four fully-controlled switching devices of the primary side single-phase full bridge H 1 are S 1 to S 4 , and the four fully controlled switching devices of the secondary side single-phase full bridge H 2 The switching devices are Q 1 to Q 4 ; the positive pole of the DC bus of the primary side single-phase full bridge is connected to the positive pole of the corresponding DC voltage source, and the negative pole of the DC bus of the primary side single-phase full bridge is connected to the corresponding DC voltage source. The negative pole is connected, and the AC side of the primary side single-phase full bridge is connected to the primary side of the high frequency isolation transformer through the high frequency inductance L s ; the positive pole of the DC bus bar of the secondary side single phase full bridge is connected to the positive pole of the corresponding DC load The negative pole of the DC bus of the secondary side single-phase full bridge is connected to the negative pole of the corresponding DC load, and the AC side of the secondary side single-phase full bridge is connected to the secondary side of the high-frequency isolation transformer. The transformation ratio of the high-frequency isolation transformer is n:1;

2)绘制本发明基于扩展移相调制能源路由器直流电压转换电路的等效电路：2) Draw the equivalent circuit of the DC voltage conversion circuit of the energy router based on the extended phase-shift modulation of the present invention:

所述的等效电路包括电压源vin、vl,v2、vo,v3，电流源iin,v1、iin,v2、io,v1、il,i3，以及无源Ls、Res、Co、RL；其中，输入等效电路由vin、iin,v1、iin,v2并联构成；输出等效电路由io,v1、il,i3、Co、RL并联构成；辅助扰动传播路径等效电路由vl,v2、vo,v3、Ls、Res串联组成；The equivalent circuit includes voltage sources v in , v l,v2 , v o,v3 , current sources i in,v1 , i in,v2 , i o,v1 , i l,i3 , and passive L s , R es , C o , R L ; wherein, the input equivalent circuit is composed of v in , i in,v1 , i in, v2 in parallel; the output equivalent circuit is composed of i o,v1 , i l,i3 , C o , R L is formed in parallel; the equivalent circuit of the auxiliary disturbance propagation path is composed of v l,v2 , v o,v3 , L s , and R es in series;

上述等效电路中，vin为能源路由器直流电压转换电路输入直流电压源，vo为输出电压；iL为高频变压器原边电流；In the above equivalent circuit, v in is the input DC voltage source of the energy router DC voltage conversion circuit, v o is the output voltage; i L is the primary current of the high-frequency transformer;

3)通过下列关系式确定所述的能源路由器直流电压转换电路各元部件的参数：3) Determine the parameters of each component of the DC voltage conversion circuit of the energy router through the following relational expressions:

本发明所述的能源路由器直流电压转换电路有2种工作模式：The energy router DC voltage conversion circuit of the present invention has two working modes:

模式1(0≤D1≤D0≤1)和模式2(0≤D0≤D1≤1)，其中D0是原边单相全桥H1与副边单相全桥H2之间的移相占空比，D1是原边单相全桥H1两桥臂之间的移相占空比，副边单相全桥H2两桥臂之间的移相占空比D2维持在0.5；Mode 1 (0≤D 1 ≤D 0 ≤1) and Mode 2 (0≤D 0 ≤D 1 ≤1), where D 0 is the one between the primary side single-phase full bridge H 1 and the secondary side single-phase full bridge H 2 The phase-shift duty cycle between the two, D 1 is the phase-shift duty cycle between the two bridge arms of the primary side single-phase full-bridge H 1 , and the phase-shift duty cycle between the two bridge arms of the secondary side single-phase full-bridge H 2 D2 remains at 0.5 ;

上述等效电路中，其iin,v1、iin,v2、io,v1、il,i3、vl,v2、vo,v3与vin、vo、iL之间的关系如下：In the above equivalent circuit, the relationship between i in,v1 , i in,v2 , i o,v1 , i l,i3 , v l,v2 , v o,v3 and v in , v o , i L is as follows :

Figure BDA0002490871000000051
Figure BDA0002490871000000051

Figure BDA0002490871000000052
Figure BDA0002490871000000052

Figure BDA0002490871000000053
Figure BDA0002490871000000053

Figure BDA0002490871000000054
Figure BDA0002490871000000054

Figure BDA0002490871000000055
Figure BDA0002490871000000055

Figure BDA0002490871000000056
Figure BDA0002490871000000056

其中，Ls是高频变压器的漏感和等效电路中的电感值，T为二分之一开关周期，其与开关频率fs之间满足2T×fs＝1；Among them, L s is the leakage inductance of the high-frequency transformer and the inductance value in the equivalent circuit, T is one-half of the switching period, and the relationship between it and the switching frequency f s satisfies 2T×f s =1;

模式1下，扩展移相调制双有源桥变换器状态方程如下：In mode 1, the state equation of the extended phase-shift modulation dual active bridge converter is as follows:

Figure BDA0002490871000000057
Figure BDA0002490871000000057

上述式子中，[iL,vo]T是状态变量，AM1,j与BM1,j是模式1下的状态矩阵，下标j＝1～6，表示对应的第j个子状态；In the above formula, [i L , v o ] T is the state variable, A M1,j and B M1,j are the state matrix in mode 1, and the subscript j=1～6 represents the corresponding jth sub-state;

Figure BDA0002490871000000061
Figure BDA0002490871000000061

Figure BDA0002490871000000062
Figure BDA0002490871000000062

Figure BDA0002490871000000063
Figure BDA0002490871000000063

Figure BDA0002490871000000064
Figure BDA0002490871000000064

Figure BDA0002490871000000065
Figure BDA0002490871000000065

模式2下，能源路由器直流电压转换电路状态方程如下：In mode 2, the state equation of the DC voltage conversion circuit of the energy router is as follows:

Figure BDA0002490871000000066
Figure BDA0002490871000000066

其中，AM2,j与BM2,j是模式2下的状态矩阵，下标j＝1～6；Among them, A M2,j and B M2,j are the state matrix in mode 2, and the subscript j=1～6;

Figure BDA0002490871000000067
Figure BDA0002490871000000067

Figure BDA0002490871000000068
Figure BDA0002490871000000068

Figure BDA0002490871000000069
Figure BDA0002490871000000069

Figure BDA00024908710000000610
Figure BDA00024908710000000610

Figure BDA00024908710000000611
Figure BDA00024908710000000611

4)将选定的元部件按所述的直流电压转换电路安装即可。4) Install the selected components according to the described DC voltage conversion circuit.

所述的直流电压转换电路，适用于基于扩展移相调制、单移相调制、双重移相调制和三重移相调制的能源路由器的直流电压转换电路。The DC voltage conversion circuit is suitable for the DC voltage conversion circuit of energy routers based on extended phase-shift modulation, single-phase-shift modulation, double-phase-shift modulation and triple-phase-shift modulation.

图2、图3分别是本发明能源路由器直流电压转换模式1与模式2下等效电路的控制框图，通过采集双有源桥变换器的输入直流电压vin、输出电压vo、高频变压器原边电流iL，根据控制框图，计算各个状态变量在给定时刻的值，从而描述能源路由器直流电压转换单元的动态特性，并得出能源路由器直流电压转换单元在稳态工作点附近的幅频特性和相频特性，用于指导控制器的设计。Fig. 2 and Fig. 3 are respectively the control block diagram of the equivalent circuit of the energy router DC voltage conversion mode 1 and mode 2 of the present invention. The primary side current i L , according to the control block diagram, calculate the value of each state variable at a given time, so as to describe the dynamic characteristics of the DC voltage conversion unit of the energy router, and obtain the amplitude of the DC voltage conversion unit of the energy router near the steady-state operating point. Frequency characteristics and phase-frequency characteristics are used to guide the design of the controller.

实验表明，本发明有助于揭示能源路由器直流电压转换--双有源桥变换器的物理本质，便于对不同工作模式的控制-输出动力学进行综合推导、分析和简化，从而避免控制所需的繁琐的数值计算。本发明设计的直流电压转换电路，适用于基于扩展移相调制、单移相调制、双重移相调制和三重移相调制的能源路由器。本发明计算简单、模型精度高、易于实际工程应用，大大提高了能源路由器直流电压转换的设计效率。Experiments show that the present invention helps to reveal the physical essence of the energy router DC voltage conversion-dual active bridge converter, facilitates the comprehensive derivation, analysis and simplification of the control-output dynamics of different working modes, thereby avoiding the need for control. tedious numerical calculations. The DC voltage conversion circuit designed by the invention is suitable for energy routers based on extended phase-shift modulation, single-phase-shift modulation, double-phase-shift modulation and triple-phase-shift modulation. The invention has the advantages of simple calculation, high model accuracy, easy practical engineering application, and greatly improves the design efficiency of the DC voltage conversion of the energy router.

Claims (2)

1.一种能源路由器直流电压转换电路的设计方法，其特征在于该方法包括下列步骤：1. A design method of an energy router DC voltage conversion circuit, characterized in that the method comprises the following steps: 1)绘制能源路由器直流电压转换电路图1) Draw the DC voltage conversion circuit diagram of the energy router 所述的能源路由器直流电压转换电路，即双有源桥变换器由输入直流电压源(vin)、原边单相全桥(H1)、副边单相全桥(H2)、高频隔离变压器、高频电感(Ls)和等效电路组成，所述的原边单相全桥(H1)的4个全控开关器件(S1～S4)，副边单相全桥(H2)的四个全控开关器件(Q1～Q4)；所述的原边单相全桥的直流母线的正极与对应直流电压源的正极相连，原边单相全桥的直流母线的负极与对应的直流电压源的负极相连，原边单相全桥的交流侧通过高频电感(Ls)与所述的高频隔离变压器的原边相连；所述的副边单相全桥的直流母线正极与对应直流负载的正极相连，副边单相全桥的直流母线的负极与对应的直流负载的负极相连，副边单相全桥的交流侧与高频隔离变压器副边相连，所述的高频隔离变压器的变比为n:1；The DC voltage conversion circuit of the energy router, that is, the dual active bridge converter is composed of an input DC voltage source ( vin ), a single-phase full bridge (H 1 ) on the primary side, a single-phase full bridge on the secondary side (H 2 ), a high It is composed of a frequency isolation transformer, a high frequency inductor (L s ) and an equivalent circuit. The four fully-controlled switching devices (S 1 to S 4 ) of the primary side single-phase full bridge (H 1 ) and the secondary side single-phase full bridge (H 1 ) Four fully-controlled switching devices (Q 1 to Q 4 ) of the bridge (H 2 ); the positive pole of the DC bus of the primary side single-phase full bridge is connected to the positive pole of the corresponding DC voltage source, and the primary side single-phase full bridge The negative pole of the DC bus is connected to the negative pole of the corresponding DC voltage source, and the AC side of the primary side single-phase full bridge is connected to the primary side of the high frequency isolation transformer through a high frequency inductor (L s ); the secondary side single-phase full bridge is connected to the primary side of the high frequency isolation transformer; The positive pole of the DC bus of the phase full bridge is connected to the positive pole of the corresponding DC load, the negative pole of the DC bus of the secondary side single-phase full bridge is connected to the negative pole of the corresponding DC load, and the AC side of the secondary side single-phase full bridge is connected to the high frequency isolation transformer. The sides are connected, and the transformation ratio of the high-frequency isolation transformer is n:1; 2)绘制能源路由器直流电压转换电路的等效电路：2) Draw the equivalent circuit of the DC voltage conversion circuit of the energy router: 所述的等效电路包括电压源vin、vl,v2、vo,v3，电流源iin,v1、iin,v2、io,v1、il,i3，以及无源Ls、Res、Co、RL；其中，输入等效电路由vin、iin,v1、iin,v2并联构成；输出等效电路由io,v1、il,i3、Co、RL并联构成；辅助扰动传播路径等效电路由vl,v2、vo,v3、Ls、Res串联组成；The equivalent circuit includes voltage sources v in , v l,v2 , v o,v3 , current sources i in,v1 , i in,v2 , i o,v1 , i l,i3 , and passive L s , R es , C o , R L ; wherein, the input equivalent circuit is composed of v in , i in,v1 , i in, v2 in parallel; the output equivalent circuit is composed of i o,v1 , i l,i3 , C o , R L is formed in parallel; the equivalent circuit of the auxiliary disturbance propagation path is composed of v l,v2 , v o,v3 , L s , and R es in series; 上述等效电路中，vin为能源路由器直流电压转换电路输入直流电压源，vo为输出电压；iL为高频变压器原边电流；In the above equivalent circuit, v in is the input DC voltage source of the energy router DC voltage conversion circuit, v o is the output voltage; i L is the primary current of the high-frequency transformer; 3)通过下列关系式确定所述的能源路由器直流电压转换电路各元部件的参数：3) Determine the parameters of each component of the DC voltage conversion circuit of the energy router through the following relational expressions: 所述的能源路由器直流电压转换电路有2种工作模式：The energy router DC voltage conversion circuit has 2 working modes: 模式1即0≤D1≤D0≤1和模式2即0≤D0≤D1≤1，其中D0是原边单相全桥H1与副边单相全桥H2之间的移相占空比，D1是原边单相全桥H1两桥臂之间的移相占空比，副边单相全桥H2两桥臂之间的移相占空比D2维持在0.5；Mode 1 is 0≤D 1 ≤D 0 ≤1 and mode 2 is 0≤D 0 ≤D 1 ≤1, where D 0 is the connection between the primary side single-phase full bridge H 1 and the secondary side single-phase full bridge H 2 Phase shift duty cycle, D 1 is the phase shift duty cycle between the two bridge arms of the primary side single-phase full bridge H 1 , and the phase shift duty cycle D 2 between the two bridge arms of the secondary side single phase full bridge H 2 maintained at 0.5; 上述等效电路中，其iin,v1、iin,v2、io,v1、il,i3、vl,v2、vo,v3与vin、vo、iL之间的关系如下：In the above equivalent circuit, the relationship between i in,v1 , i in,v2 , i o,v1 , i l,i3 , v l,v2 , v o,v3 and v in , v o , i L is as follows :
Figure FDA0003531280330000011
Figure FDA0003531280330000011
Figure FDA0003531280330000012
Figure FDA0003531280330000012
Figure FDA0003531280330000013
Figure FDA0003531280330000013
Figure FDA0003531280330000014
Figure FDA0003531280330000014
Figure FDA0003531280330000021
Figure FDA0003531280330000021
Figure FDA0003531280330000022
Figure FDA0003531280330000022
 其中，Ls是高频变压器的漏感和等效电路中的电感值，T为二分之一开关周期，其与开关频率fs之间满足2T×fs＝1；Among them, L s is the leakage inductance of the high-frequency transformer and the inductance value in the equivalent circuit, T is one-half of the switching period, and the relationship between it and the switching frequency f s satisfies 2T×f s =1; 模式1下，扩展移相调制双有源桥变换器状态方程如下：In mode 1, the state equation of the extended phase-shift modulation dual active bridge converter is as follows:
Figure FDA0003531280330000023
Figure FDA0003531280330000023
 上述式子中，[iL,vo]T是状态变量，AM1,j与BM1,j是模式1下的状态矩阵，下标j＝1～6，表示对应的第j个子状态；In the above formula, [i L , v o ] T is the state variable, A M1,j and B M1,j are the state matrix in mode 1, and the subscript j=1～6 represents the corresponding jth sub-state;
Figure FDA0003531280330000024
Figure FDA0003531280330000024
Figure FDA0003531280330000025
Figure FDA0003531280330000025
Figure FDA0003531280330000026
Figure FDA0003531280330000026
Figure FDA0003531280330000027
Figure FDA0003531280330000027
Figure FDA0003531280330000028
Figure FDA0003531280330000028
 模式2下，能源路由器直流电压转换电路状态方程如下：In mode 2, the state equation of the DC voltage conversion circuit of the energy router is as follows:
Figure FDA0003531280330000029
Figure FDA0003531280330000029
 其中，AM2,j与BM2,j是模式2下的状态矩阵，下标j＝1～6；Among them, A M2,j and B M2,j are the state matrix in mode 2, and the subscript j=1～6;
Figure FDA00035312803300000210
Figure FDA00035312803300000210
Figure FDA0003531280330000031
Figure FDA0003531280330000031
Figure FDA0003531280330000032
Figure FDA0003531280330000032
Figure FDA0003531280330000033
Figure FDA0003531280330000033
Figure FDA0003531280330000034
Figure FDA0003531280330000034
 4)将选定的元部件按所述的直流电压转换电路安装即可。4) Install the selected components according to the described DC voltage conversion circuit. 2.根据权利要求1所述的能源路由器直流电压转换电路的设计方法，其特征在于所述的直流电压转换电路，适用于基于扩展移相调制、单移相调制、双重移相调制和三重移相调制的能源路由器的直流电压转换电路。2. The design method of energy router DC voltage conversion circuit according to claim 1, it is characterized in that described DC voltage conversion circuit is suitable for based on extended phase shift modulation, single phase shift modulation, double phase shift modulation and triple shift modulation Phase modulation of the DC voltage conversion circuit of the energy router.
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