摘要
LLC在轻载工况下普遍采用Burst控制,需间歇性断开输入端,应用在以光伏电源作为输入源的变换器上,会造成能量的浪费。为了解决这一问题,针对光伏-储能型双输入LLC变换器,提出了一种轻载变模态Burst控制策略,通过在变换器次级串联一个开关管,来调整变换器的工作模态,提高了光伏利用率;推导出了此控制策略的适用范围,并通过仿真与实验验证了所提控制策略的可行性。
LLC generally adopts Burst control under light load condition which needs to intermittently disconnect the input end.When applied to the converter with photovoltaic power as input source,it will cause energy waste.In order to solve this problem,a light-load variable mode Burst control strategy is proposed for the photovoltaic-energy storage dual-input LLC converter.A switch tube is connected in series at the secondary side of the converter to adjust the working mode of the converter and improve the photovoltaic utilization rate.The applicable scope of the control strategy is deduced and the feasibility of the proposed control strategy is verified by simulation and experiment.
作者
冯兴田
周广睿
李紫岩
FENG Xing-tian;ZHOU Guang-rui;LI Zi-yan(China University of Petroleum(East China),Qingdao 266580,China)
出处
《电力电子技术》
北大核心
2023年第5期54-56,68,共4页
Power Electronics
基金
国家自然科学基金(51977220)
山东省自然科学基金(ZR2019MEE094)。
关键词
变换器
轻载
光伏利用率
converter
light-load
photovoltaic utilization rate
