| 引用本文: | 范恩泽,赵 鲁,李耀华,葛琼璇,马呈瑶.一种输入串联输出并联双有源桥变换器输入电压自平衡结构[J].电力系统保护与控制,2023,51(23):141-150.[点击复制] |
| FAN Enze,ZHAO Lu,LI Yaohua,GE Qiongxuan,MA Chengyao.A structure with IVS self-balancing for an ISOP-DAB converter[J].Power System Protection and Control,2023,51(23):141-150[点击复制] |
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| 一种输入串联输出并联双有源桥变换器输入电压自平衡结构 |
| 范恩泽1,2,赵鲁1,2,李耀华1,2,葛琼璇1,2,马呈瑶1,2 |
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| (1.中国科学院电力电子与电气驱动重点实验室(中国科学院电工研究所)，北京 100190;
2.中国科学院大学，北京 100049) |
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| 摘要: |
| 输入串联输出并联(input series output parallel, ISOP)双有源桥(dual active bridge, DAB)变换器的输入均压(input voltage sharing, IVS)主动控制策略存在控制系统复杂和传感器数量较多的问题。相反地，无源调控方法的控制系统简单，因而具有明显的优势。基于无源均压思想，提出一种适用于共占空比控制的基于耦合电容的ISOP-DAB变换器的输入电压自平衡拓扑结构，通过耦合电容使得子模块的高频链环节产生电气耦合，从而实现子模块输入电压的均衡。进一步，给出含有耦合电容的ISOP-DAB变换器的简化等效电路，并进行理论分析与推导，得到子模块输入母线电压偏差及耦合电容电流与变换器硬件参数的关系。理论计算表明该拓扑在子模块参数存在较大的偏差时仍然具有较好的IVS能力。最后，仿真和实验结果验证该拓扑的可行性和有效性。 |
| 关键词: 输入串联输出并联 双有源桥变换器 输入均压 共占空比控制 耦合电容 自平衡 |
| DOI：10.19783/j.cnki.pspc.230729 |
| 投稿时间：2023-06-14修订日期：2023-08-20 |
| 基金项目:中国科学院青年创新促进会项目资助(2020146)；北京市自然科学基金项目资助(L201005) |
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| A structure with IVS self-balancing for an ISOP-DAB converter |
| FAN Enze1,2,ZHAO Lu1,2,LI Yaohua1,2,GE Qiongxuan1,2,MA Chengyao1,2 |
| (1. Key Laboratory of Power Electronics and Electric Drive, Institute of Electrical Engineering, Chinese Academy of
Sciences, Beijing 100190, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China) |
| Abstract: |
| The input voltage sharing (IVS) active control strategies of input-series output-parallel (ISOP) dual-active- bridge (DAB) converters have the problems of a complex control system and a large number of sensors. Passive approaches have concise control, and so have obvious advantages. Based on passive voltage balancing, a self-balancing topology with IVS for ISOP-DAB converter adopting coupling capacitors is proposed. Through coupling capacitors, the high-frequency-links of submodules are electrically coupled, thereby realizing the balance of input voltages of submodules. Also, a simplified equivalent circuit of the proposed ISOP-DAB converter with coupling capacitors is provided, and theoretical analysis and derivation are carried out to obtain the relationship between the input bus voltage deviation of the submodules and the coupling capacitor current to the converter parameters. The theoretical calculation results show that the proposed topology has better IVS capability in the presence of relatively large deviations among submodules. Finally, the feasibility and effectiveness of the proposed topology are verified by simulation and experiment. |
| Key words: input-series output-parallel (ISOP) dual-active-bridge (DAB) converter input voltage sharing (IVS) common-duty-ratio control coupling capacitor self-balancing |
