应用附加元素定理的直流配电系统稳定性分析方法  

Stability Analysis Method for DC Distribution System Using Additional Element Theorem

作　　者：张辉 凌孺 朱刘柱 王绪利 程啸 ZHANG Hui;LING Ru;ZHU Liuzhu;WANG Xuli;CHENG Xiao(Economic and Technological Research Institute,State GridAnhui Electric Power Co.,Ltd,Hefei 230022,China)

机构地区：[1]国网安徽省电力有限公司经济技术研究院,合肥230022

出　　处：《电力系统及其自动化学报》2025年第4期129-138,共10页Proceedings of the CSU-EPSA

基　　金：国网安徽省电力有限公司经济技术研究院科技项目(SGAHJY00GHJS2200052)。

摘　　要：为解决由于直流配电系统拓扑结构灵活以及电力电子源荷随机性、波动性强等特点造成系统稳定性差的问题,本文研究恒功率负荷通过线路连接至直流母线对直流配电系统产生的稳定性影响。首先,对中压直流配电系统进行建模,讨论状态反馈控制的原理和方法;然后,基于附加元素定理进一步分析线路纵向参数在系统中可能引起的振荡,提出一种基于状态反馈控制及PI控制的振荡抑制方案;最后,在PLECS仿真软件上搭建相应的电路模型,证明了所提控制方法的有效性。To solve the problem of system stability caused by the characteristics of a DC distribution system such as flex-ible topology and high random fluctuation of power electronic sourcesand loads,the impact on the stability of the DC distribution system caused by constant-power loads connected to DC buses through lines is studied in this paper.First,amedium-voltage DC distribution system is modeled,and the principles and methods of state feedback control are dis-cussed.Then,the possible oscillations caused by the longitudinal parameters of the line in the system are further ana-lyzed according to the additional element theorem,and an oscillation suppression scheme based on the state feedback control and PI control is proposed.Finally,the corresponding circuit model is constructed usingthe simulation software-PLECS,and results prove the effectiveness of the proposed control method.

关 键 词：直流配电系统 附加元素定理 控制策略 稳定分析方法 

分 类 号：TM73[电气工程—电力系统及自动化]