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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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

Received: 17 September 2012 Published: 25 March 2014

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TM463

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	Articles by authors
	Zhang Yun
	Wang Yifeng
	Shao Hongjun
	Sun Jiantao

Cite this article:

Zhang Yun,Wang Yifeng,Shao Hongjun等. Topology Synthesis of Hybrid Buck Three-Level Converter and Its Operation Control with Extreme Low Voltage-Gain[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 119-125.

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

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