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一种零电压转换H6结构非隔离光伏并网逆变器

DOI: 10.13334/j.0258-8013.pcsee.2014.03.006, PP. 363-370

Keywords: 并网逆变器,非隔离,零电压开通,谐振

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Abstract:

非隔离型单相光伏并网逆变器的漏电流和效率是两个关键指标。非隔离型并网逆变器相比隔离型结构有效率优势,但到目前为止,非隔离型并网逆变器的高频开关仍然工作在硬开关状态。提出一种零电压转换H6结构非隔离光伏并网逆变器,通过引入两组谐振支路可实现高频主开关的零电压开通和零电压关断,高频辅助开关管的零电流开通,及续流二极管的零电压开通和零电压关断。论文详细分析新型逆变器的工作模态、软开关条件、占空比约束条件和谐振参数设计方法,并通过一台100kHz、1kW样机验证新型逆变器的可行性。

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