摘要
直流输电可能引发整流站附近的火电机组产生次同步振荡风险。基于溪洛渡右岸电站送电广东500 kV同塔双回直流输电第一回工程投产初期可能出现的运行条件,采用机组作用系数法找出可能发生次同步振荡风险的系统运行方式,并利用PSCAD/EMTDC进行时域仿真,结果显示:威信和镇雄电厂汽轮机组均存在次同步振荡的风险,采用次同步振荡阻尼控制器可有效抑制次同步振荡现象。
An HVDC transmission system may cause subsynchronous oscillation （SSO） in thermal generation units nearby its rectifier station. According to the possible situation of the first DC transmission system of Xiluodu right station -- Guangdong double circuit ＋500 kV DC transmission project, this paper seeks out the system operation modes of likely leading to SSO with UIF calculation, and makes time-domain simulation to these modes with PSCAD/EMTDC. The results show that there are possbile SSO risks for the thermal generation units at both Weixin and Zhenxiong power plants, and the SSO can be effectively suppressed with subsynchronous damping controllers （SSDC）.
出处
《南方电网技术》
2012年第5期13-17,共5页
Southern Power System Technology
关键词
高压直流输电
同塔双回直流输电工程
次同步振荡
机组作用系数
次同步阻尼控制器
HVDC
double circuit DC transmission project
subsynchronous oscillation （SSO）
unit interaction factor （UIF）
subsynchronous damping controller （SSDC）
