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基于扩展状态平均法的隔离型多端口移相全桥双向直流变换器建模研究
Modeling of Isolated Multi-port Bidirectional DC-DC Converter with Phase-shifted Full Bridge Based on Extended State-space Averaging Method
投稿时间:2018-07-29  修订日期:2018-08-29
DOI:
中文关键词:  多端口直流变换器  状态平均  小信号模型  移相控制
英文关键词:multi-port DC-DC converter  state-space averaging  small-signal model  phase-shifted control
基金项目:国家重点基础研究发展计划(973计划)
作者单位E-mail
李鑫 合肥工业大学电气与自动化工程学院 lixin@hfut.edu.cn 
张微微 合肥工业大学电气与自动化工程学院 2429051425@qq.com 
朱浩宇 合肥工业大学电气与自动化工程学院 971175264@qq.com 
黄钰笛 合肥工业大学电气与自动化工程学院 262855610@qq.com 
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中文摘要:
      建立了一种用于混合储能系统的隔离型多端口双向直流变换器的数学模型。通过星-网变换建立了移相控制下直流变换器多端口网型等效电路,通过扩展状态平均法建立了N端口变换器在电感电流连续时的状态平均模型和小信号模型,并分析了各端口之间传输的功率。仿真比较了不同端口数下变换器的模型输出和拓扑输出,并以三端口变换器为例,分析了移相比扰动下的模型和拓扑电路的动态响应。结果表明,提出的多端口直流变换器的数学模型能够准确反映移相控制下多端口变换器的稳态性能和动态性能,且对于不同端口数量的直流变换器具有普遍适用性。
英文摘要:
      A mathematical model of isolated multi-port bidirectional DC-DC converter for hybrid energy storage system is presented. The multi-port equivalent circuit of DC-DC converter under phase-shifted control is established by wye-net transformation. State-space averaging model and small-signal model of N-port DC-DC converter under condition of continuous conduction mode are established by the generalized state-space averaging method, and the energy between each port is analyzed. Comparisons are made between the output of mathematical model and the topology circuit with simulation. And taking three-port DC-DC converter as an example, the dynamic responses of the model and the topology under disturbance of phase-shifted radio and power voltage are analyzed. Result shows that the proposed mathematical model can accurately reflect steady-state performance and dynamic performance of the multi-port converter under phase-shifted control. The proposed model is proper for converters with different port numbers when there is no restricts on the ports.
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