单层采动诱发长壁开采水平岩层开裂、冒落过程模拟——基于连续-非连续方法

针对直流闭锁将给送端系统造成很大冲击!很可能导致送端互联系统失稳的问题!通过分析直流闭锁后送端互联系统失稳机理!并在此基础上对比分析切机与直流紧急功率支援改善送端互联系统暂态稳定性的实质与区别!又从抑制联络线功率波动峰值的角度对比分析了二者的区别!并搭建测试算例进行了验证" 分析结果表明#切机和直流紧急功率支援都能改善送端互联系统的暂态稳定!但直流紧急功率支援要优于切机"

Comparison and analysis on generator tripping and emergency DC power support after H VDC transmission system blocking

HVDC blocking will cause a great impact on sending end system, and this impact may re-sult in instability of the sending end interconnected system. By analyzing the instability mechanism ofsending end interconnected system after H V DC blocking, the essence and difference of applying gen-erator tripping and emergency DC power support to improve the transient stability of the sending endinterconnected system were analyzed and compared, and from the angle of restraining the peak valueof power fluctuation on AC tie-line, the differences between generator tripping and emergent DCpower support were analyzed. A test example was set up to verify the results. The simulation resultsshow that both generator tripping and emergency DC power support can improve the transient stability of sending end interconnected system, but emergency DC power support is prior to generator tripping.