摘要
现有的直流变换器对于轻载和重载情况下的效率很低。虽然这方面已经做了很多研究来提高直流变换器的效率,但是受限于材料,结构和制造工艺的限制,效果并不理想。基于光伏微网的阵列式直流电力变换系统能很好地解决这个问题。传统电力变换在直流微网损耗里占了很大一部分,尤其升压变换效率,阵列式直流电力变换系统在损耗控制上有很显著的表现。在仿真环境中,效率相对于集中式电力变换器得到了16.5%的提升,并且在仿真周期中,电力的利用率提升了7.55%。系统不仅增加了直流微网的效率,而且依靠系统结构上的分散设计,提高了系统的可靠性。
Existing DC power converters have low efficiency in the case of light or heavy load.Despite of much research aiming at improvement of their efficiency,final effect is not ideal due to limitations in the field of material,structure and manufacturing processes.The DC power array conversion system based on the photovoltaic micro-grid can solve this problem.As traditional power conversion occupies a large part of power loss in DC micro-grids,especially in the respect of efficiency of boost conversion,the proposed DC PAC(power array conversion)has remarkable performance for loss control.In the simulation environment,its efficiency was raised by 16.5%as compared with the centralized power converter,and its power utilization rate was raised by 7.55%during the simulation cycle.The proposed system could not only raise the efficiency of the DC micro-grid,but also improve system reliability by virtue of decentralized design of system structure.
作者
邬志卿
Wu Zhiqing(Department of Electric Engineering, Florida Institute of Technology, Melbourne Florida 32901, USA)
出处
《电气自动化》
2020年第6期84-88,共5页
Electrical Automation
关键词
新能源
微网
智能电网
直流变换器
电力变换效率
new energy resource
micro-grid
smart grid
DC converter
power conversion efficiency
