A PMU-based fast real-time sub-synchronous oscillation detection application

The share of wind power has strongly increased in electricity production, raising several issues concerning its integration to power grids. Unexpected dynamic phenomena, such as oscillatory events around 13 Hz have been recorded in the US by Oklahoma Gas & Electric (OG&E). Such interactions differ from traditional and well studied inter-area oscillations, and the ability to detect them is beyond the measurement capabilities of most of the existing measurement equipment and monitoring tools in Energy Management Systems (EMS) systems. This paper presents the development and implementation of algorithms for PMU-based real-time fast sub-synchronous oscillation detection, focusing on the aforementioned case. The paper focuses on the tool itself and its algorithms, briefly presents an approach carried out for testing and validating it. Experience from the use of the tool at OG&E is also described.