SOFC-锂电池的船用直流微网的动态稳定性-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Dynamic Stability of Marine Direct Current Microgrid with SOFC and Lithium Batteries

作者:: 方乙彬1; 李素文1; 2; 俞万能1; 2; ( 1.集美大学轮机工程学院，福建厦门361021；2.福建省船舶与海洋工程重点实验室，福建厦门361021)

Author(s):: FANG Yibin1; LI Suwen1; 2; YU Wanneng1; 2; (1.School of Marine Engineering,Jimei University,Xiamen 361021,China;2.Fujian Province Key Laboratory of Naval Architecture and Ocean Engineering,Xiamen 361021,China)

Keywords:: electro-electrical composite marine DC microgrid; hybrid potential function; large-signal stability; stability boundary; solid oxide fuel cells(SOFC)

摘要:: 推进电机负载的冲击特性对固体氧化物燃料电池（solid oxide fuel cells，SOFC）和锂电池组成的电电复合船舶直流微网动态稳定性提出了很大的挑战。重点研究带SOFC的船舶直流微电网的大信号稳定性和动态响应特性，采用混合势函数方法对传统双闭环控制策略的电源侧变换器的大信号特性进行建模，推导出双闭环控制策略下系统的大信号稳定判据和负载稳定边界。比较系统在冲击性负荷阶跃大信号运行不同工况下的动态响应特性。仿真结果表明，所获得的稳定性判据能精确计算稳定性边界，准确判别系统的动态稳定性。

Abstract:: The impact characteristics of propulsion motor loads pose substantial challenges to the dynamic stability of shipboard direct current(DC) microgrids composed of solid oxide fuel cells (SOFC) and lithium batteries.This paper focuses on the large-signal stability and dynamic response characteristics of shipboard DC microgrids with SOFC.Using the hybrid potential function method,the large-signal characteristics of the power-side converter were modeled under the traditional dual-loop control strategy.The large-signal stability criteria and load stability boundaries for the system were derived under the dual-loop control strategy.The dynamic response characteristics of the system under various operating conditions with impulsive load steps were compared.Simulation results showed that the obtained stability criteria could accurately calculate stability boundaries and determine the dynamic stability of the system.