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无变压器非隔离型三电平光伏逆变器载波调制对系统漏电流影响分析

DOI: 10.13334/j.0258-8013.pcsee.2015.16.020, PP. 4167-4174

Keywords: 无变压器非隔离型光伏系统,三电平光伏逆变器,载波调制,共模电压,漏电流

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Abstract:

调制策略是影响无变压器非隔离型光伏逆变器系统漏电流大小的重要因素之一。针对非隔离型三电平光伏逆变器,首先分析系统寄生电容电压和开关状态之间的关系,然后研究载波正向层叠和反向层叠调制对系统共模电压的影响,通过逻辑状态关系提出一种新型载波调制方案,并对三种载波调制方案进行仿真研究,最后在TMS320F28335DSP?XC3S400FPGA数字控制实验平台上对上述方案进行实验研究,结果验证了提出方法的可行性和有效性。

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