电力系统次同步振荡检测与在线定位技术综述

随着电网规模扩大以及新能源发电并网容量增加，次同步振荡(SSO)问题日益凸显，对电网安全稳定运行造成了较大的威胁。及时检测出系统中的SSO并对其进行在线定位，对保障电力设备安全与系统稳定运行具有重要意义。首先对SSO的检测方法进行了介绍，并归纳总结了各类方法的优缺点。然后，介绍了SSO定位方法，并对现有研究存在的不足进行了探讨。最后，介绍了适用于SSO在线检测定位的量测系统架构以及相量测量单元/广域测量系统(PMU/WAMS)升级改造方案，并对SSO检测与定位技术未来的发展趋势进行了展望。

Review of detection and online localization technology of sub-synchronous oscillation in power system

With the expansion of the power grid scale and the increase of the renewable energy power gene-ration capacity, SSO(Sub-Synchronous Oscillation) has become an increasingly prominent problem which poses a great threat to the safe and stable operation of power grid. Timely detection and online localization of SSO in system contribute significantly to the safety of power equipment and the stable operation of system. The SSO detection methods are firstly introduced, the pros and cons of which are also sorted and summarized. Secondly, the localization methods of SSO source are introduced, and the weaknesses of the existing researches are discussed. Finally, the measurement system architecture for SSO online detection and localization, and the improvement scheme of PMU/WAMS(Phasor Measurement Unit/Wide Area Measurement System) are introduced, then the development trend of SSO detection and localization technology in the future is prospected.