摘要
信阳电网处于河南电网南部末端,信阳电网与河南电网由两回220kV线路联络,与主网联系较为薄弱,稳定性较差。当主网通过两条联络线向信阳电网南送时,暂稳极限为300MW,供电缺口达100MW。通过分析相关线路保护动作时间、开关分闸时间等因素,研究了确定合理设置故障切除时间的方法,提高了输电断面极限。通过仿真验证,采用该分析方法可避免故障后切负荷操作,显著地提升了信阳与主网的断面极限,提出了提高断面输电极限的一种新思路。
Xinyang power grid is connected from Henan power grid through two 200 kV AC lines in the south. Because of the weak connection, the transient stability limit is 300 MW with 100 MW shortage while the electricity power transmission from Henan main grid to Xinyang. By analyzing the relay protection and switch action time, a method to improve the transmission capacity through determining the practical fault isolation time is discussed. The method can avoid load shedding strategy after contingency and enhance the stability of Xinyang-Henan transmission system, which is a new idea to such problem.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第13期126-129,共4页
Power System Protection and Control
关键词
暂态稳定
输电断面
传输极限
transient stability
transmission interface
transmission limit
