摘要
在多DC-DC变换器并联系统中,经常采用环流反馈回路中引入虚拟阻抗的均流方法,此方法精度高且成本低,但当系统负载突变时均流精度会降低.针对虚拟阻抗法在负载突变时均流精度降低的问题,提出一种自适应匹配虚拟阻抗值实现均流的方法.仿真结果表明,在负载突变时自适应虚拟阻抗匹配法具有很好的均流效果,且不影响并联系统的稳定性和输出特性.
Introducing in the virtual impedance method into circulating current feedback loop is commonly used in multiple DC-DC converter parallel system, which has high accuracy and low cost. But when the system load mutates, current sharing precision will decrease. Aiming at the precision problem, an adaptive matching method of virtual impedance was proposed. The simulation results of the adaptive virtual impedance method showed effectiveness with the load mutation, meanwhile did not affect the stability and output characteristics of the parallel system.
出处
《安徽大学学报（自然科学版）》
CAS
北大核心
2016年第4期67-72,共6页
Journal of Anhui University(Natural Science Edition)
基金
国家自然科学基金资助项目(51567022)
