Assurance of Stability: Data-Driven Oscillation Tracing

Power system oscillations caused by inverter-based resources (IBRs) have been detected in GB since 2021. Existing model-driven methods have been unsuccessful in identifying the origins of these oscillations due to the absence of vendor-specific IBR models. This project aims to: 

• Evaluate the effectiveness of existing data-driven (model-free) methods such as dissipating energy flow (DEF) and compass plot method for identifying and analysing IBR-induced oscillations
• Develop new methods tailored to IBR-related oscillations
• Create criteria to select the optimal tracing method based on oscillation type.  
• Define specifications for the minimum resolution, bandwidth, and data measurement coverage
• Identify the best combination of measurement devices to meet these requirements. 

Benefits

Expensive mitigation actions are typically taken after a major oscillation event. The cost of an oscillation event can be even higher if it triggers a power outage. This project enables NESO to rapidly and accurately identify the origins of oscillations and thereby limit the range and impact of oscillation events. The project additionally provides a tool for the NESO to communicate with vendors for effective cause identification and troubleshooting. The project aims to deliver clear guidelines for deploying data measurement devices

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