现代电力2024，Vol.41Issue(6)：1001-1008,8.DOI:10.19725/j.cnki.1007-2322.2022.0347
柔性直流引发火电机组次同步振荡的电气负阻尼关键因素分析
Key Factors Analysis of Negative Electrical Damping for Sub-synchronous Oscillation in Thermal Power Units Induced by Flexible-HVDC
摘要
Abstract
The negative electrical damping is the direct reason for the sub-synchronous oscillation in the near area where a large number of power electronic devices are connected to the power system.It is very important to understand the mechan-ism of electrical negative damping and to formulate suppres-sion measures that determine the key links and parameters that cause electrical negative damping.To address this problem,firstly,the complex torque coefficient transfer function was ex-panded;the extreme value of electrical damping was defined;the key oscillation modes and fractions causing negative damp-ing were determined based on mode decoupling by the electric-al damping analysis method with improved complex torque coefficients.Secondly,the electrical damping correlation factor and sensitivity were introduced to determine the key influen-cing links and parameters of electrical negative damping,and the parameter adjustment scheme was given to suppress sub-synchronous oscillation according to the sensitivity analysis results.Finally,the time domain simulation of this method is verified by the PSCAD model.关键词
柔性直流/次同步振荡/电气阻尼/模式解耦/影响环节定位Key words
flexible-HVDC/sub-synchronous oscillation/electrical damping/modal decoupling/influence factor posi-tioning分类
信息技术与安全科学引用本文复制引用
刘博昊,肖仕武..柔性直流引发火电机组次同步振荡的电气负阻尼关键因素分析[J].现代电力,2024,41(6):1001-1008,8.基金项目
国家自然科学基金资助项目(2021BJ0226).Project Supported by National Natural Science Foundation of China(NSFC)(2021BJ0226). （2021BJ0226）
