摘要
云南省大规模的水电每年通过±800 k V直流和500 k V交流输电线路向广东省远距离输送,云南相当规模的小水电群,通过35 k V、110 k V低电压等级线路逐级、远距离向主网外送电力。在这样的长距离、大功率的输电模式下,动态稳定性较差。自2003年以来云南发生了多次低频振荡,其强相关机组既涉及大水电机群,又涉及各小水电富集地区的小电机群。云南电网致力于机网协调、在线监测、振荡源辨识和定位、振荡解列等技术研究,建立了基于三道防线的动态稳定综合预防和控制体系,切实提高了电网动态稳定性,最大限度增送了云南西部水电,取得了良好的社会经济效益。
Every year, a large amount of hydropower is transmission from Yunnan to Guangdong through ±800 kV DC and 500 kV AC.Meanwhile, many small-scale hydropower plants also provide electrical power service to the loads far away from them through 35 kV and 110 kV power grids.In such a long distance, large power transmission mode, the dynamic stability is poorer.Since 2003, several low-frequency oscillations have been detected in Yunnan, and the Strong correlation factors involve large hydropower groups and small hydropowergroups.We studied the technical measures such as generator-grid coordination, on-line monitoring, i-dentification and location of oscillation sources and power system islanding , And nowa comprehensive prevention and control system based on the“three defensive lines” had been building.With the improvement of dynamic stability, the transmission of hydropower increased well also.It’ s good to the social and economic benefits.
出处
《云南电力技术》
2014年第6期22-25,共4页
Yunnan Electric Power
关键词
动态稳定
低频振荡
机网协调
在线监测
振荡解列
综合防控
dynamic stability
low-frequency oscillations
generator-grid coordination
on-line monitoring
oscillation islanding
comprehensiveprevention and control
