单级式单相太阳能光伏并网逆变系统的设计

Design of Single-stage Single-phase Gird-connected Solar Energy PV System

对于太阳能光伏并网逆变系统,转换效率是至关重要的。目前系统采用得比较多的是多级式变换的拓扑结构,虽然这种结构控制相对简单,但转换效率由于变换级数的增加而难以提高。而单级式拓扑结构具有电路简单、可靠性高和高效低功耗等诸多优点,随着现代电力电子技术以及数字信号处理技术的飞速发展,系统拓扑结构引起的控制困难正在逐渐被克服,单级式拓扑结构越来越多的成为太阳能光伏并网逆变系统设计的首选。该文设计一3KW的单级式单相太阳能光伏并网逆变系统,在Mat-labR2006a/Simulink仿真环境下进行仿真实验,验证了系统设计的正确性。

For grid-connected solar energy photovoltaic inverter system, the co nversion efficiency is crucial adjective.At present the multi-stage transformat ion topology are more used in one system.Although the control of this structure is relatively simple, but the conversion efficiency is difficult to improve due to increase in transformation series.While the single-stage topology has a simp le circuit, high reliability and high efficiency and low power consumption and m any other advantages.With the rapid development of modern power electronic techn ology and digital signal processing technology, the difficult to control caused by system topology gradually be overcome.More and more grid-connected solar ene rgy photovoltaic inverter system design choose single-stage topology. This pape r designs a 3KW single-stage single-phase grid-inverter solar energy photovol taic system.Under the MatlabR2006a/Simulink simulation environment to do simulat ion experiments to verify the correctness of the system design.