【摘要】 对一种新型广域后备保护方案进行研究。该保护利用现代通信网络和时间同步技术,通过对广域范围内的故障电流及开关位置信息的采集和综合分析,判断故障区域和开关动作情况,利用实时网络拓扑图和跳闸函数实现最优后备保护跳闸方案。它不存在传统后备保护中动作时限和动作区域相互配合的问题,能大大缩短保护的整体动作时间,优化后备保护的整体功能。应用实例证明了该保护所具有的优点。更多还原

【Abstract】 A new relaying scheme for the wide-area backup protection is studied in this paper. Based on the technology of modern communication network and time synchronization, through the information sampling of the fault current and comprehensive analysis of CB status, it detects the fault area and CB operation, and provides an optimal backup protection scheme using the topology of real-time power network and the tripping function. The proposed relaying scheme can reduce fault clearance time greatly by minimizing the integer time of a backup trip without the problem of coordinating tripping time limit and tripping region in the conventional system. The scheme is evaluated with the case of a real power system.更多还原