【摘要】 在蓄电池/超级电容混合储能独立光伏发电系统中,为了减小系统体积及提高系统抗扰性,采用单向Cuk变换器代替传统Boost变换器实现光伏电池最大输出功率点追踪,采用双向Cuk变换器代替传统Buck/Boost双向变换器连接储能系统与直流母线。系统仿真分析结果表明,当光伏电池输出功率波动及负载发生突变时,在稳定母线电压及平抑负载功率波动方面,Cuk变换器均有明显优势。更多还原

【Abstract】 To improve the stability of stand-alone photovoltaic power system that connected with battery and super-capacitors hybrid energy storage system,a novel control scheme was proposed. Unidirectional Cuk converter was used to implement the PV maximum power point tracking( MPPT) instead of the Boost converter. Moreover,the bi-directional Cuk converter was achieved to connect the energy storage system with the DC bus instead of the bidirectional Buck / Boost converter. The simulation results and analysis show that Cuk converter is superior in steadying the DC bus voltage and balancing the instantaneous power even under the fluctuation of PV cell output and pulsating load.更多还原