级联高频DC/DC变换系统的大信号稳定性研究  

The Large-signal Stability Analysis of DC/DC Cascaded System

作　　者：张军明[1] 张弘强 杜韦静[1] 

机构地区：[1]浙江大学,浙江杭州310027 [2]嘉兴太平洋江茂电子有限公司,浙江嘉兴314000

出　　处：《电力电子技术》2014年第6期22-25,共4页Power Electronics

基　　金：国家自然科学基金(50907061)~~

摘　　要：复杂电力电子系统的稳定性分析是电力电子集成系统的关键问题之一,尤其是大信号扰动下的稳定性。对直流分布式系统中最为常用的级联系统稳定性进行研究,基于Brayton-Moser混合势函数理论对其大信号稳定性特性进行分析,提出了解析形式的稳定性判据。所提出的稳定性判据形式简单,可在设计阶段为集成系统的稳定性设计提供理论依据,据此选择与系统需求匹配的功率模块,保证复杂系统的稳定性。实验结果验证了所提出稳定性判据的有效性。The stability of a complex power electronics system is an important aspect of the power electronics system integration with standard power module, especially for the stability under disturbance.Since the cascaded connection of power converters is one of the most dominant connection forms in the DC distributed power system, the stability anal- ysis of the cascaded system is very important to ensure stability of the whole system.Based on Brayton-Moser＇s mixed potential theory, an estimation of the region of attraction are investigated for cascaded system in the DC distributed power system.Based on the analysis, a stability prediction criterion for cascaded system under large-signal disturbance is obtained.The relationship between system parameters and the stability is presented and discussed.Therefore, instead of trial and error, the proposed criterion can predict and guarantee the stability operation of cascaded system during the design process, and it is also helpful to select matched power converters in system level design.The experimental results verify the effectiveness of the proposed criterion.

关 键 词：级联系统 大信号 稳定性 

分 类 号：TM465[电气工程—电器]