摘要
为获得变频驱动感应电机调速系统低频振荡产生的原因,以实验室一套船舶电力推进系统为例展开研究。建立了基于小扰动的感应电机、变频器及船舶电力推进系统的数学模型,分析了死区时间对系统稳定性的影响。利用根轨迹分析方法,通过解析计算与仿真分析绘制了系统的不稳定区域。讨论了电机定子电阻和漏感变化对系统稳定区域的影响,进行了试验验证,试验结果与解析计算得到的不稳定区域吻合较好,证明所建立的船舶电力推进系统小扰动数学模型以及采用的系统稳定性分析方法是正确可行的。
To obtain the reasons for the low-frequency oscillation of the speed regulating system of variable frequen-cy-driven induction motor, an electric propulsion system for ships in the laboratory as an example was researched. The mathematical models of the electric propulsion system for ships, the induction motor and the inverter based on small disturbance were built, and the effect of dead time on the stability of system was analyzed. Based on the root-locus method, the unstable areas of the system were drawn by the analytic calculation and emulated analysis, re-spectively. The effect of the resistance of motor stator and the change of leakage inductance on the stable area of the system was discussed and validated by experimental research. The unstable areas of experimental results coincide well with the analytic calculation. It was able to verify that the built small disturbance model of the electric propul-sion system for ships and the stability analysis method of the system is right and feasible.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2015年第5期611-615,共5页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(51277177)
关键词
船舶电力推进系统
低频振荡
小扰动
系统稳定性
不稳定区域
electric propulsion system for ships
low-frequency oscillation
small disturbance
system stability
un-stable areas
作者简介
乔鸣忠（1971-），男，教授，博士生导师；
曾海燕（1984-），女，硕士研究生．通信作者：曾海燕，E—mail：haiyan1212@163．com．
