电力系统自动化2018，Vol.42Issue(9)：164-170,7.DOI:10.7500/AEPS20171108003
含虚拟同步发电机的多端柔性直流系统稳定性分析
Stability Analysis of Multi-terminal Flexible DC System with Virtual Synchronous Generators
摘要
Abstract
The stability of multi-terminal flexible DC systems with virtual synchronous generators(VSG)is studied.Firstly, the transfer function models of voltage source converter(VSC) controlled by VSG or vector are developed respectively. Secondly,the influence of VSG access on the stability of multi-terminal DC(MTDC)system is analyzed by the damping torque method.Then the following conclusions are drew:1)the assumption that"the power injected into VSG from the DC side is constant"ignores the dynamic interaction between the VSG and remaining DC system,which leads its results not to be general;2)there are stability risks in MTDC system with VSGs,and the system is affected by the control parameters of VSG and the dynamic interaction between the VSG and remaining DC system;3)the oscillations may happen in the MTDC system when the open-loop mode of VSG is close to the open-loop mode of the remaining DC system,thus this paper proposes an effective parameter adjustment method.Finally,the time-domain simulation analysis of a three-terminal flexible DC system with VSGs is carried out and the above results are verified.关键词
多端柔性直流系统/虚拟同步发电机/阻尼转矩分析法/稳定性分析Key words
multi-terminal flexible DC system/virtual synchronous generator (VSG)/damping torque analysis method/stability analysis引用本文复制引用
付强,杜文娟,黄登一,王海风..含虚拟同步发电机的多端柔性直流系统稳定性分析[J].电力系统自动化,2018,42(9):164-170,7.基金项目
国家自然科学基金资助项目(51407068).This work is supported by National Natural Science Foundation of China(No.51407068). （51407068）
