【摘要】 阐述了3kW光伏并网逆变器的关键技术。通过对光伏并网逆变器最大功率点跟踪、孤岛效应和并网控制等问题的分析,提出了具体的解决方案。并且通过对最大功率跟踪算法的改变及变压器切换的控制,使逆变器在轻载的条件下,依然可以获得较好的工作效率。更多还原

【Abstract】 This paper introduced the fundamentals and key techniques of 3 kW grid-connected PV inverter. Not only the of maximum power point tracking and islanding protecting techniques, but also the technique for inverter to connected with grid are discussed in detail. When the inverter works under light load conditions, it will change the method of maximum power point tracking and change the transformer to a smaller one which will increase the efficiency of the inverter remarkable. The experiment proves the feasibility of the control scheme.更多还原