This project will develop a ‘GB-like’ test case to study Inverter-based resources (IBR) induced instability problems of the kind experienced in Scotland in recent years. This is likely to be based around north Scotland where the oscillation problems have been prominent so far. To accelerate simulation, this project will investigate model complexity reduction using a combination of analytical and heuristic methods and explore new model aggregation rules with theoretical guarantees of accuracy. This project will benchmark the complexity reduction and model aggregation techniques by comparing against ‘full’ Electro Magnetic Transients (EMT) simulation.  

Benefits

The project outcomes will enable NESO to achieve several key objectives: (i) validate findings from various NIA projects on IBR-induced stability issues using a ‘GB-like’ test case, (ii) simplify EMT model complexity to accelerate simulations, and (iii) develop aggregated IBR representations with plant-level and device-level control to further expedite EMT simulations. Accelerating these simulations is crucial as system-wide EMT simulations are computationally demanding, limiting the number of scenarios that can be analysed within a given timeframe. 
This project is expected to provide significant benefits, including increased confidence in addressing IBR-induced stability problems, facilitating their integration into existing systems. It will enable quicker analysis and decision-making in EMT studies, improving the efficiency of scenario exploration. This enhances system reliability, optimises performance, and contributes to overall system resilience and efficiency.