基于双级矩阵变换器的变速恒频电源系统的稳定性分析及其改善措施  

Stability Analysis and Improving Strategies for Two Stage Matrix Converter-Based Variable Speed Constant Frequency Power System

作　　者：秦显慧[1] 周波[1] 刘晓宇[1] 雷家兴[1] 韩娜[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室(南京航空航天大学)南京210016

出　　处：《电工技术学报》2016年第13期18-25,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51177069);江苏省高校优秀科技创新团队资助项目

摘　　要：基于双级矩阵变换器(TSMC)的变速恒频电源系统具有效率高、功率密度高、可靠性高和使用寿命长等诸多优点,在航空电源系统中具有广阔的应用前景。但受输入滤波器欠阻尼振荡的影响,基于TSMC的电源系统存在稳定性差的问题。本文讨论了输出侧LC滤波器和输出电压闭环对系统稳定性的影响,在输出电压双闭环的基础上,提出一种基于输入侧电容电压微分前馈的新型有源阻尼算法,改善了系统的稳定性。在定频和变频输入的条件下,实验结果均验证了该算法的有效性和可行性。The variable speed constant frequency （ VSCF） power system based on two stage matrix converter（ TSMC ） has advantages in efficiency, power density,reliability, and lifetime. Thus, it earns a broaderapplication prospect in the aero power system. However, the TSMC often suffers from instability due to theunderdamped oscillation of the input filter. In this paper, the influence of the output filter as well as the outputvoltage close-loop control upon the system stability is discussed. And a novel active damping algorithm based onthe derivative feedforward of the input voltage is proposed to improve the system stability. Experiments verified thefeasibility and validity of the proposed algorithm with both fixed and variable input frequencies.

关 键 词：双级矩阵变换器 变速恒频 稳定性 有源阻尼算法 

分 类 号：TM91[电气工程—电力电子与电力传动]