多母线级联的海底直流供电系统阻抗建模与稳定性分析  

Impedance Modeling and Stability Analysis of Multi-bus Cascaded Subsea DC Power Supply System

作　　者：陈浩杰 李杨[1] 帅智康[1] 吴向阳 CHEN Haojie;LI Yang;SHUAI Zhikang;WU Xiangyang(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电源学报》2025年第1期151-159,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(52125705);中国博士后科学基金面上资助项目(2021M701137);湖南省自然科学基金资助项目(2022JJ40066)。

摘　　要：随着海底观测网规模的扩大,其大功率供电系统的稳定性问题受到关注。基于此,建立了海底供电系统关键部件的阻抗模型,针对海底直流供电系统高电力电子渗透率、多母线级联且邻级母线交互耦合的特点,采用逐级分析法探究海底直流供电系统稳定性及其影响因素。分析结果表明:控制器积分参数是Buck变换器失稳的主导参数,控制器比例参数是接驳盒子系统失稳的主导参数,光电复合海缆电阻参数的增大及电感参数的减小均可有效提升系统的稳定性。基于PLECS仿真软件的仿真结果验证了稳定性分析结果的正确性。With the scale expansion of a subsea observation network,the stability of its high-power power supply system has attracted attention.First,the impedance models of key parts in the subsea power supply system are established.Considering the characteristics of high power electronic penetration rate,multi-bus cascading and adjacent bus interactive coupling of the subsea DC power supply system,the stability and influencing factors of the system are explored by using the step-by-step analysis method.The analysis result shows that the integral parameter of the controller is the dominant parameter that leads to the instability of the Buck converter,and the proportional parameter of the controller is the dominant parameter that results in the instability of the junction box subsystem.Both an increase in the impedance parameter of the optoelectronic composite cable and a decrease in the inductance parameter are beneficial to improving the system stability.The simulation results based on the PLECS simulation software verify the stability analysis results.

关 键 词：海底观测网 直流供电系统 阻抗建模 小信号稳定性 

分 类 号：TM76[电气工程—电力系统及自动化]