潮流转移区域后备保护动作特性自适应调整策略  

Adaptive Strategy for Backp uProtections Within Power Transferring Area Against Cascading Trips

作　　者：杨文辉 毕天姝 薛安成 黄少锋 杨奇逊 

机构地区：[1]新能源电力系统国家重点实验室,华北电力大学,北京市102206

出　　处：《电力系统自动化》2011年第18期1-6,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金重大国际合作项目(50920105705),国家自然科学基金重点项目(50837002);高等学校学科创新引智计划资助项目(B08013);国家重点基础研究发展计划(973计划)资助项目(2009CB219704)~~

摘　　要：为防御线路的过负荷连锁跳闸,对后备保护动作特性的自适应调整策略进行了研究。该策略定义了潮流转移区域的概念,对支路切除引起的潮流转移发生范围进行界定,进而基于图论,给出了潮流转移区域的搜索方法。在此基础上,以避免初始支路切除事件直接导致过负荷跳闸为目标,给出了潮流转移区域后备保护动作特性自适应调整策略的快速搜索方法。最后,给出了自适应调整策略的实现逻辑,保证策略在可靠切除区内短路故障的前提下,有效防御后备保护的潮流转移过负荷跳闸。仿真结果验证了提出策略的有效性和必要性。In order to prevent the cascading line overload trip,an adaptive strategy for adjusting backup protection operation characteristics is studied.The concept of power transferring area is defined to describe the influence scope of power transferring caused by branch removal events,and the method for searching power transferring areas is provided based on graph theory.To avoid immediate overload trip of backup protection caused by initial branch removal events,the rapid searching method for adaptive strategy is proposed.Finally,the implementation logic of adaptive strategy is also given to avoid undesired overload trip of backup protection on basis of reliable clearance of internal short-circuit fault.Simulation results demonstrate the effectiveness and necessity of the proposed method.

关 键 词：后备保护 潮流转移 自适应 连锁跳闸 电力系统 

分 类 号：TM77[电气工程—电力系统及自动化]