Simulated and measured inter-area mode shapes and frequencies in the electrical power system of great britain

This paper presents and compares the results of two different approaches to identify the mode shapes and frequencies of the inter-area oscillations in the electrical power system of Great Britain (GB). The approaches are simulation-based analysis, carried out using the full dynamic model of the GB network in DIgSILENT PowerFactory, and measurement-based analysis, with data provided by phasor measurement units installed in the GB transmission system, as operated by National Grid. The results show good correlations between dominant modes, but less consistency on other inter-area modes.