大容量变流器DCM模式下带逆变器级联系统静态稳定性分析  

Static stability analysis of cascaded system with high-capacity converter and inverter in DCM

作　　者：范学鑫[1] 彭方成 王瑞田[1] 杨国润[1] 张新生[1] FAN Xue-xin;PENG Fang-cheng;WANG Rui-tian;YANG Guo-run;ZHANG Xin-sheng(National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval Univ. of Engineering, Wuhan 430033, China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《海军工程大学学报》2020年第3期18-25,共8页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51707200,51490680)。

摘　　要：为了确保级联系统在全负载功率范围的静态稳定,针对DC/DC变流器运行于DCM模式时的级联系统进行了建模及静态稳定性分析。首先,基于开关网络平均法建立变流器DCM模式的小信号模型,通过将逆变器模型简化为电容并联恒功率负载,建立级联系统的小信号模型;然后,通过特征值灵敏度分析控制参数对系统静态稳定性的影响,并在此基础上基于全局寻优法对控制参数进行优化。仿真和试验结果表明:该级联系统模型能够准确反映DCM模式下的系统特性,且在控制参数优化后,系统的静态稳定性得到了有效改善。In order to ensure static stability of the cascaded system in total range of load,mainly focuses on modeling and static stability analysis when the DC/DC converter runs in DCM.Firstly,a small signal model of converter in DCM mode is established based on the switching network averaging method.By simplifying the inverter model as a capacitance in parallel with constant power load,the small signal model of the cascaded system is built.Secondly,the influence of parameters on the system static stability is analyzed by eigenvalue sensitivity.On this basis,control parameters are optimized by means of Global Search.The simulation and test results show that the cascaded system model accurately reflects the characteristics of the system in DCM mode,and that the static stability of the cascaded system can be effectively improved by control parameters optimization.

关 键 词：级联系统 DCM 小信号建模 静态稳定性 参数优化 

分 类 号：TM46[电气工程—电器]