基于电感电流反馈的双向DC-DC变换器下垂控制  

Droop Control of Bi-directional DC-DC Converters Based on Inductive Current Feedback

作　　者：杨翔宇[1] 肖先勇[1] 马俊鹏 李媛[1] YANG Xiangyu;XIAO Xianyong;MA Junpeng;LI Yuan(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan Province,China)

机构地区：[1]四川大学电气工程学院,四川省成都市610065

出　　处：《中国电机工程学报》2020年第8期2638-2646,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51707126)。

摘　　要：该文以直流微网中广泛应用的双向DC-DC变换器为研究对象,提出基于电感电流反馈的下垂控制策略。首先,分析传统基于并网电流反馈的双向DC-DC变换器控制算法的工作原理;然后,分析传统电压外环-并网电流内环的双闭环和电压外环-电感电流内环的双闭环DC-DC变换器控制系统的稳定性,在此基础上,提出一种基于电感电流反馈的双向DC-DC变换器下垂控制方法,并对其稳定性进行分析;与传统下垂控制策略相比,所提算法在保证变流器本体稳定性的同时,能有效实现输出功率自动均衡,达到下垂控制的目的;最后,通过实验测试验证了所提算法的有效性和正确性。In this paper, the inductor current feedback based droop control was proposed for bi-directional DC-DC converter widely used in DC microgrid. The operation principle of the traditional droop control with the output current feedback for bi-directional DC-DC converter was analyzed. And then the stability of the double closed-loop control for the bi-directional DC-DC converters with the outer loop voltage control and the inner inductance current control was analyzed in detail. Furthermore, the proposed droop control method based on inductance current feedback was proposed and the stability of the proposed method was elaborated. The proposed can effectively improve the control system stability of the DC-DC converter with the power sharing ability. The experimental tested verify correctness and effectiveness of the control system.

关 键 词：直流微网 DC-DC变流器 下垂控制 电感电流反馈 稳定性 

分 类 号：TM72[电气工程—电力系统及自动化]