【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。该文针对潮流转移引起的连锁跳闸问题,提出了一种基于广域同步测量系统(WAMS)的预防连锁跳闸控制策略。利用网络支路电流与注入电流之间的关系,提出了最佳切机、切负荷控制点的选取原则,在此基础上推导了切机、切负荷控制量的计算方法,并提出了这一预防连锁跳闸控制策略的流程;同时,给出了控制策略中涉及到的动态过程中切机、切负荷前支路电流的计算方法。最后,文中对新英格兰10机系统进行了发生潮流转移情况下切机、切负荷控制策略的仿真,验证了该控制策略的有效性。更多还原

【Abstract】 Cascading trips caused by flow transferring are the crucial reason of a lot of well-known blackouts.It threatens the security and reliability of power systems severely.A wide area measurement system(WAMS) based control strategy to prevent cascading trips caused by flow transferring is presented. By analysis of the relationship of node injection current and branch current of network,the principle of control nodes selection of load shedding and generator tripping and the calculation method of control quantity are proposed.The corresponding of the control strategy is also given.The calculation method of branch current before the control action during power system dynamic process is given.The simulation results of 10-generator 39-bus New England System show that the control strategy can prevent cascading trips effectively.更多还原