【摘要】 随着世界能源危机的到来,光伏发电成为新能源发电中的主流。研究了一种新型Boost AC模块式光伏逆变器,详细介绍了其工作原理,分析了稳定性。该拓扑结构克服了传统基于Buck型逆变器的诸多缺点,通过控制可使其交流侧输出电压低于或高于直流侧电压,使整个逆变器结构更紧凑,效率更高。深入研究了该逆变器正弦脉宽调制(SPWM)控制算法,采用一种新型的电压电流双闭环非线性控制和并联式最大功率点跟踪(MPPT)实现方法,使系统效率显著提高。最后以DSP和IPM为核心设计了硬件系统,经仿真实验验证该系统具有优良的性能。更多还原

【Abstract】 With the energy crisis,photovoltaic(PV) power generation becomes the main form of the new energy exploitation. A novel Boost AC module PV inverter is proposed.The principle of die Boost inverter,working mode and the analysis of stability are described.This PV topology can generate an AC output voltage larger or lower than the input which has more compact and efficient.The sinusoidal pulse width modulation(SPWM) of the inverter is researched.A new method is adopted which achieves both current and voltage feedback loop control.The parallel connection of the maximum power point tracking(MPPT) for PV applications is used to increase the system efficiency.Finally hardware system based on the DSP and IPM is designed.Simulation and experimental results show its effectiveness.更多还原