摘要
对伊敏电厂拟安装 5 0 0 MW和 6 0 0 MW汽轮发电机 ,并通过有串联补偿的长距离 5 0 0 k V输电线路接入系统后的过高串补度引发的次同步谐振 ,进行了分析研究。研究表明 ,在常规串补情况下 ,5 0 0 MW发电机较 6 0 0 MW发电机更易被激发轴系次同步谐振 ,所以在确定串联补偿度时 ,前者应成为考核重点 ;长距离输电系统易发生次同步谐振 (SSR) ,但当受端的等值阻抗值与补偿线路的阻抗值相当 (即等值串补度降低 )时 ,可能发生 SSR的频率减少为各有 1个 ;伊敏电厂在单台发电机运行 ,双回线路和发电机轻载时易发生 SSR。
MW and 600MW turbine generators are installed in the Yimin Power Plant. They are connected into the electrical system via long distance 500kV transmission lines with series compensation capacitors. In order to tell how to prevent SSR, which used to be caused by over compensation, analysis is given in this paper. In the case of conventional compensation, it is proved by several ways that shaft oscillation in 500MW generators is more easily excited than that in 600MW ones. The shaft parameters of the turbine generator set are discussed.
出处
《电网技术》
EI
CSCD
北大核心
2000年第5期10-12,55,共4页
Power System Technology
基金
国家自然科学基金! (596370 50 )
东北电管局资助项目
