基于交错并联boost电路的集中式光伏发电系统

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为了减小光伏发电系统因功率扰动造成的能量损耗,提高光伏发电系统的效率和质量,将交错并联boost变换器应用于集中式光伏发电系统。在分析交错并联boost光伏发电系统运行特性的基础上,通过状态空间方程建立了交错并联boost电路的数学模型,设计了合理的补偿结构,以提高系统稳态和动态性能。仿真和实验结果表明,交错并联boost电路用于集中式光伏发电系统,不仅能够减小光伏模块的输出电流纹波,而且提高了光伏模块输出电流纹波的频率,减小了电感设计尺寸,降低了开关管的电流应力,提高了系统的功率密度和系统稳定性。

Aiming at reducing the power losses caused by power fluctuation for photovohaic power generation system and improving the power quality and efficiency of the PV system, the interleaved boost converters were adopted in centralized photovohaic system. On the basis of analysis of PV power generation system with interleaved boost operating characteristics, the mathematical model of interleaved boost based on state-space equation was established to design reasonable compensation block and improve the system steady-state and dynamic performance. Simulation and experimental results indicate that an overall reduction of current ripple amplitude and inductor size as well as high frequency of curre...