Localizing sources of troublesome oscillations, particularly forced oscillations (FOs), in power systems has received considerable attention over the last few years. This is driven in part by the massive deployment of phasor measurement units (PMUs) that capture these oscillations when they occur; and in part by the increasing incidents of FOs due to malfunctioning components, wind power fluctuations, and/or cyclic loads. Capitalizing on the frequency divider formula of [1], we develop methods to localize single and multiple oscillatory sources using bus frequency measurements. The method to localize a single oscillation source does not require knowledge of network parameters. However, the method for localizing FOs caused by multiple sources requires this knowledge. We explain the reasoning behind this knowledge difference as well as demonstrate the success of our methods for source localization in multiple test systems.

翻译：电力系统中干扰性振荡源，特别是强迫振荡源的定位问题，在过去几年中受到了广泛关注。这一方面得益于相量测量单元的大规模部署，使其能够在振荡发生时捕获相关数据；另一方面也源于因元件故障、风电功率波动和/或周期性负荷导致的强迫振荡事件日益增多。基于文献[1]中的频率分配器公式，我们提出了利用母线频率测量值定位单源与多源振荡源的方法。单振荡源定位方法无需网络参数信息，而针对多源强迫振荡的定位方法则需要此类参数。本文阐释了这两种方法在参数需求上存在差异的理论依据，并通过多个测试系统验证了所提源定位方法的有效性。