【摘要】 潮流转移引起的连锁跳闸是导致世界各国大停电事件发生的重要因素,严重地威胁着电力系统的安全运行。该文针对多支路连锁切除事件引发的潮流转移问题,将潮流转移因子进一步从单支路切除情况推广到多条支路连锁切除的情况,根据潮流在支路间的折返过程推导了发生多支路连锁切除事件时潮流转移因子的计算公式;并在结合计及暂态过程的支路电流估算的基础上,提出了发生多支路连锁切除事件后,基于广域测量系统(WAMS)有限测点下的支路电流估算方法与潮流转移识别算法。新英格兰10机系统仿真结果验证了文中提出的支路电流估算方法与潮流转移识别算法的有效性。更多还原

【Abstract】 Cascading trips caused by flow transferring are the crucial causation of a lot of well-known blackouts. It severely threatens the security and reliability of power systems. Flow transferring relativity factor (FTRF) is extended from single branch removal event to multi-branches removal event. According to refraction and reflection process of flow transferring,the calculation formula of FTRF for multi-branches chain removal event is deduced. Moreover,by using the relationship of node injection currents and branch currents,a method of post-fault branch current estimation and a flow transferring identification algorithm based on WAMS to distinguish flow transferring in transient period is presented. The simulation results of 10-generator 39-bus New England System show that the proposed estimation method and the identification algorithm work well.更多还原