考虑振荡中心漂移的解列新方案  

A New Scheme for Out-of-Step Splitting Considering Drift of Oscillation Center

作　　者：冯康恒 张艳霞[1] 刘志雄[1] 李婷[1] 马桦岩 

机构地区：[1]智能电网教育部重点实验室(天津大学),天津市南开区300072

出　　处：《电网技术》2015年第4期1082-1087,共6页Power System Technology

摘　　要：研究了系统失步时两侧电势幅值不相等及系统运行方式变化对振荡中心和失步中心的影响,构造了振荡中心位置函数,提出一种新的解列方案。该方案利用ucos?配合振荡中心位置函数的变化率启动解列装置,综合振荡中心的漂移特点、失步中心的位置和解列后孤岛不平衡度来搜索解列断面,能有效区分同步振荡和失步振荡,捕捉振荡中心的变化轨迹和失步中心的位置,不受系统运行方式变化和结构改变的影响。MATLAB仿真验证了所提方案的有效性。When power grid operates under out-of-step condition, the impacts of unequal potential amplitudes at both out-of-step sides and the change of operation modes on oscillation center and out-of-step center are researched and the function of oscillation center position is constructed, and a new splitting scheme is proposed. In the proposed scheme, the splitting device is started up by ucos^p coordinated with the change rate of the function of oscillation center position, and searching the splitting interface by synthesizing the drifting characteristics of oscillation center and the position of out-of-step center with the degree of unbalancedness of post-splitting island can effectively distinguish synchronous oscillation from asynchronous oscillation, and the variation trajectory of oscillation center as well as the position of out-of-step center can be captured and not affected by the change of system topology and operation modes. The validity of the proposed scheme is verified by MATLAB based simulation results.

关 键 词：失步振荡 振荡中心 失步中心 不平衡度 解列断面 

分 类 号：TM721[电气工程—电力系统及自动化]