一种光伏并网交错反激微逆变器在大负载范围内实现高效率的混合控制方法

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2013-03-17 DOI:10.1109/APEC.2013.6520294

Yue Zhang, Xiao-Fei He, Zhiliang Zhang, Yanfei Liu

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引用次数: 8

摘要

在反激微逆变器中，边界导通模式(BCM)和断续导通模式(DCM)控制策略被广泛应用。研究了不同负载条件下BCM和DCM控制策略下交错反激微逆变器的损耗分析。BCM和DCM控制策略对反激微逆变器的损耗分布和效率有不同的影响。在分析损耗的基础上，提出了一种将两相DCM和单相DCM相结合的混合控制策略，通过减小随负载电流变化的主导损耗，提高了宽负载范围内的效率。实验结果验证了该控制方法的有效性。

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A hybrid control method for photovoltaic grid-connected interleaved flyback micro-inverter to achieve high efficiency in wide load range

For flyback micro-inverters, Boundary Conduction Mode (BCM) and Discontinuous Conduction Mode (DCM) control strategies are widely used. Loss analysis is investigated for the interleaved flyback micro-inverter under BCM and DCM control strategies under different load condition. The BCM and DCM control strategies have different impact on the loss distribution and thus the efficiency of the flyback micro-inverter. Based on the loss analysis, a new hybrid control strategy combing the two-phase DCM and one-phase DCM control is proposed to improve the efficiency in wide load range by reducing the dominant losses depending on the load current. The experimental results verified the benefits of the proposed control.

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来源期刊

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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