中文摘要：

基于广域测量系统（WAMS）信息,提出了一种断面自适应复合解列判据及相应的解列方案。该自适应复合判据不仅利用Ucosφ的原理反映振荡中心电压的变化规律,而且加入动作特性独立于振荡中心位置的电流变化辅助判据,可及时检测系统是否失步。山东电网仿真结果表明：该判据能自动适应运行方式的变化,动态捕捉振荡中心,弥补单一判据的不足。

英文摘要：

Based on the wide area measurement system （WAMS）, an adaptive out-of step detecting composite criterion and a corresponding out-of-step splitting framework are proposed. The main Ucos φ criterion, which reflects the changing track of oscillation center voltage, detects the synchronism loss. While the auxiliary criterion, which reflects changes of three-phase currents, guarantees the reliability of splitting action. Furthermore, the auxiliary criterion is independent of the oscillation center. These two criterions are used together for determining out-of-step accurately and duly. Simulation results of a practical power system in China have demonstrated that the proposed scheme can adapt to changes of operating conditions, capture the position of the out-of-step center dynamically and code with the shortcomings of a single criterion.