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单相电力电子变压器中串联谐振型双有源桥电流特性分析
资料介绍
三级式电力电子变压器(PET)因其良好的控制特性,受到了广泛关注和应用。三级式PET由输入级、隔离级和输出级构成,各级之间通过储能电容相连。由于功率半导体器件的耐压水平有限,一般此类PET由多个功率模块级联构成。各功率模块的中间环节通常采用串联谐振型双有源桥(DAB)变换器来实现不同直流电压等级之间的电能变换与电气隔离。本文在考虑PET交流输入侧、直流输出侧瞬时功率分布规律的基础上,建立了单相PET功率模块的动态等效电路模型,推导了其中串联谐振型DAB的电流时域解析表达式及其简化模型。通过所搭建的Matlab/Simulink仿真模型和电力电子变压器功率模块测试平台验证了该模型的正确性。
The three-stage power electronic transformer(PET)has been widely concerned and applied because of its good control performances.This type PET is composed of input,isolation and output stages,which are connected by the energy storage capacitance.Owing to the limited voltage level of power semiconductor devices,a plurality of power modules constitute the PET through cascade connection.The intermediate part of the power module usually adopts the series resonant dual active bridge(DAB)to realize electrical isolation and energy conversion between different DC voltage levels.On account of the instantaneous power distribution characteristic of the single-phase PET AC input and DC output sides,a dynamic equivalent circuit model of the power module is proposed in this paper.Then,this paper derives the analytical current expression and simplified model of the series resonate DAB in time domain.The validity of the model is verified by the simulation built in the Matlab/Simulink and PET power submodules test platform.
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| 文件名 | 大小 |
| 单相电力电子变压器中串联谐振型双有源桥电流特性分析.pdf | 3M |
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