摘要
在柔性直流输电VSC-HVDC系统中,直流电压的稳定和直流传输容量对系统而言尤为重要。本文通过对VSC-HVDC受端系统进行小信号阻抗建模,研究了逆变站响应时间常数对直流系统小干扰稳定性的影响,得到了响应时间常数与直流传输容量之间的关系。采用PSCAD/EMTDC软件搭建柔性直流输电系统仿真模型,仿真结果表明,VSC-HVDC系统中逆变站的响应时间常数与直流传输容量呈正相关,传输容量越大负荷恢复越快。
In the flexible DC transmission VSC-HVDC system,the stability of DC voltage and DC transmission capacity are particularly important for the system.By modeling the small signal impedance of VSC-HVDC receiver system,the influence of the response time constant of inverter station on the small signal stability of DC system is studied,and the relationship between the response time constant and DC transmission capacity is obtained.The PSCAD/EMTDC software is used to build the simulation model of flexible DC transmission system.The simulation results show that the response time constant of inverter station in VSC-HVDC system is positively correlated with DC transmission capacity.The larger the transmission capacity is,the faster the load recovery is.
作者
文彬彬
WEN Binbin(College of Electrical and Information Engineering,Changsha University of Technology,Changsha 410000,Hunan,China)
出处
《电气传动自动化》
2022年第4期37-42,共6页
Electric Drive Automation
关键词
柔性直流输电
小信号阻抗模型
响应时间
小干扰稳定性
flexible DC transmission
small signal impedance model
response time
small interference stability
