复合Buck三电平直流变换器拓扑合成及其极低电压增益运行控制

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摘要针对舰船直流区域配电系统的大比例降压需求, 基于传统的单相二极管钳位型三电平逆变器拓扑, 推导出两种准Buck三电平直流变换器。以两种准Buck三电平拓扑的“输入端并联—输出端串联”的合成方式, 提出一种复合Buck三电平直流变换器。采用双调制波PWM控制方法, 实现变换器无需变压器或耦合电感的极低电压增益运行, 同时避免功率开关的极端占空比状态。根据电压增益和占空比所允许的范围, 构建双调制度的约束函数, 实现变换器功率开关的非极端占空比与电感电流波动幅度的协调控制。最后, 通过两组典型的实验, 表明了所提拓扑和控制方法的可行性和有效性。

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	张云
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关键词 ：舰船直流区域配电, 复合Buck三电平直流变换器, 极低电压增益, 非极端占空比, 电感电流波动幅度

Abstract：In order to satisfy the high step-down conversion demand of the DC zonal electric distribution system on the ship, two quasi Buck three-level DC-DC converters are deduced based on the traditional single-phase diode-clamped three-level inverter. Then a novel hybrid Buck three-level converter is synthesized by the mode of the “input sides in parallel—output sides in series” of the two quasi converters. The double-wave PWM control method is adopted, and it can not only operate with transformerless extreme low voltage-gain, but also avoid extreme duty cycles of the power switches. The restricted functions of the double-wave indexes are established by means of the given ranges of the voltage gains and duty cycles, then the harmonic control method for the non-extreme duty cycles and the fluctuating amplitude of the inductor current can be obtained. Finally, the feasibility and validity of the proposed topology and control method are verified by two groups of typical experiments.

Key words： DC zonal electric distribution on ships hybrid Buck three-level DC-DC converter extreme low voltage-gain non-extreme duty cycles fluctuating amplitude of inductor current

收稿日期: 2012-09-17 出版日期: 2014-03-25

PACS:

TM463

基金资助:国家自然科学基金(51207104)和教育部博士点基金(20110032120082)资助项目。

作者简介: 张云男, 1980年生, 博士研究生, 讲师, 研究方向为电力电子功率变换系统及其控制、电机驱动控制和分布式发电系统。王议锋男, 1981年生, 博士研究生, 讲师, 主要研究方向为大功率照明电子技术、低电压大电流功率变换器及软开关技术。

引用本文:

张云, 王议锋, 邵虹君, 孙建涛. 复合Buck三电平直流变换器拓扑合成及其极低电压增益运行控制[J]. 电工技术学报, 2013, 28(4): 119-125. Zhang Yun, Wang Yifeng, Shao Hongjun, Sun Jiantao. Topology Synthesis of Hybrid Buck Three-Level Converter and Its Operation Control with Extreme Low Voltage-Gain. Transactions of China Electrotechnical Society, 2013, 28(4): 119-125.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I4/119

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