Enhancing transmission line resilience through N-K contingency analysis and mitigation on the transmission network of Uganda
Abstract
The operational status of transmission lines significantly influences the electric power system, with line outages posing economic and safety risks. The resilience of electrical grids is paramount for ensuring continuous and secure energy supply to consumers. DIgSILENT PowerFactory software was used to conduct N-k contingency analysis and the performance indices were used to rank and obtain the most vulnerable lines in the transmission network of Uganda. Results obtained showed that Kabale-Toff Muvumbe and Nkenda-Mbarara South are most vulnerable transmission lines to power overloads whereas Owenfalls-Lugazi, Kabale-Toff Muvumbe and Namanve-Toff Namanve are most vulnerable transmission lines to voltage violations. Adoption and installation of phase measurement unit can enhance the transmission line resilience, redundancy and minimizes the risk of widespread blackouts.