应用于多通道不同时解列的快速解列判据  

Fast Tripping Criterion Used in Multi-Channel Tripping

作　　者：杨雨昂[1] 杨立红[1] 慕宗江[1] 彭志峰[1] 杨明玉[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《中国电力》2013年第10期41-45,共5页Electric Power

基　　金：国家自然科学基金资助项目(50906079);北京市科技计划资助项目(Z111108062510002)

摘　　要：通过大量仿真计算发现,现有快速解列装置在处理多失步通道互联电网问题时,存在各通道不同时解列的情况,容易诱发临近未失步的线路在解列进程中发生失步振荡。为避免这种状况的发生,在支路势能函数的基础上,推导出判断单条线路在系统失步振荡时的稳定度函数,并利用此函数给现有快速解列判据增加一个能够统筹各通道解列顺序的附加判据,这种改进能有效避免原快速解列判据无法彻底消除系统振荡的情况,最后用实际算例验证改进快速解列判据的优越性。A large number of simulation calculations show that the existing fast tripping systems have different channel tripping in different time when dealing with multi-channel power grid.In this case,out-of-step oscillation may be induced in the fragile line closing to out-of-step in the process of tripping.In order to avoid this case,an additional criterion is proposed,which is based on the stability function of a single line in out-of-step system.At the same time,the stability function of a single line in out-of-step system is based on the line transient potential energy function.In all,such improvement of criterion can effectively avoid the case that the original fast tripping criterion can＇t completely eliminate the system oscillations.Finally,a case simulation is conducted to verify the effectiveness of the improved fast tripping criterion.

关 键 词：快速解列 多通道 稳定度函数 解列顺序 

分 类 号：TM712[电气工程—电力系统及自动化]