电网技术2018，Vol.42Issue(1)：34-40,7.DOI:10.13335/j.1000-3673.pst.2017.0944
多端柔性直流接入对交流系统功角稳定性的影响
Angular Stability of Power Systems Integrated With VSC-MTDC Grid
摘要
Abstract
This paper investigates small-signal angular stability of AC power system affected by an integrated multi-terminal DC (MTDC) network.An interconnected linearized model of AC/MTDC system is established.The model clearly shows that MTDC affects small-signal angular stability of AC system by introducing changes in dynamic interactions and load flow.Dynamic interactions are usually small according to damping torque analysis.Impact of load flow change brought by MTDC is the primary factor.Considering power flow change related to DC power injection and its location in AC system,this paper proposes following two ideas:1.The DC power change is balanced by balance machine in AC system,so impact of DC power injection on AC system is equal to the impact of balance machine;2.The impact of DC power injection on AC system may be smaller when location of DC system is near the balance machine with smaller power flow change.Above ideas,avoiding adverse effect on angular stability of AC system,are demonstrated and verified with calculation and simulation with New England System as an example.关键词
小干扰功角稳定性/VSC-MTDC/阻尼转矩分析Key words
power system small-signal angular stability/VSC-MTDC/damping torque analysis分类
信息技术与安全科学引用本文复制引用
付强,杜文娟,王海风..多端柔性直流接入对交流系统功角稳定性的影响[J].电网技术,2018,42(1):34-40,7.基金项目
国家重点研发计划项目(2016YFB0900602). Project Supported by National Key Research and Development Program (2016YFB0900602). （2016YFB0900602）
