Electromechanical Oscillation Index for Modern Power Systems

The integration of unconventional energy sources, flexible loads and data center loads in the modern power system is rapidly rising due to the demand for clean, efficient, sustainable and environmentally friendly power sources and AI deployment. Although there are benefits of using renewable energy sources over fossil fuels, there are still concerns about the reliability, security and resiliency of power systems that have a considerable amount of variable and intermittent power sources. Electromechanical oscillations (EMOs) in the power system, which are related to synchronous generators’ rotors swinging together and/or against each other, are critical. Power system stabilizers (PSSs) effectively mitigate EMOs and enhance system stability, but their efficacy can be limited under certain conditions, particularly with high renewable energy integration and the nonlinear dynamics of power systems. Venayagamoorthy and his team have developed an index based on synchronized measurements of generator frequencies to quantify the severity of EMOs, referred to as the EMO index (EMOI). The EMOI