中文摘要：

持续的周期性小扰动会引发电力系统强迫振荡,通过切除扰动原则可以使振荡迅速衰减。为了能够找到扰动源的具体位置,使振荡快速平息,对共振稳态时线性化系统能量转换特性进行了分析,结合实际电网扰动源自动定位存在的一些问题,对能量函数法进行了改进,提出了利用耗散功率进行扰动源识别的新方法。基于该方法,对4机2区系统、某实际大电网仿真模型以及广域测量系统（wide area measure system,WAMS）实测数据进行了仿真分析,结果表明利用耗散功率能够快速准确地确定强迫功率振荡扰动源的位置,说明了利用耗散功率进行扰动源识别方法的可行性以及对实际电网的适用性。

英文摘要：

The continuous cyclical small signal power disturbances could excite the power system forced power oscillation,and the removal of disturbance sources can attenuate the oscillation rapidly.In order to find the specific location of the disturbance source to make the oscillation die down quickly,we analyzed the energy conversion characteristics of the forced power oscillation in a linear system during the steady-state resonance.Considering the application of practical power system and program realization of automatic positioning,we improved the energy function,and proposed a new method of disturbance source localization by using power dissipation.The proposed method is proved to be effective by case study of two-area with four-machine system,simulation model of a regional power grid,and wide area measure system（WARMS） measure data of the regional power grid.