Contingency Analysis and Mitigation Strategies for Enhanced Resilience in Islanded Microgrids

In order to ensure the reliability and security of islanded microgrids, contingency analysis is an important aspect. In the present study, we investigate the N-1 and N-2 contingency criteria in is-landed microgrids using the modified decoupled Newton-Raphson power flow method. Islanded microgrids, which operate autonomously of the main grid, have specific difficulties in preserving stability and dependability, especially when handling component failures. The N-1 contingency criterion considers the impact of losing a single component, such as a generator or transmission line, while the N-2 contingency criterion accounts for the simultaneous loss of two components. The approach put out in this study takes apparent power overloading and voltage violations into account simultaneously. The proposed approach has been applied on three distinct systems to verify its effectiveness. The distributed energy resources, have been integrated through sophisticated monitoring and control systems, and optimized the microgrid configuration using dynamic reconfiguration techniques to reduce the impact of various contingencies on voltage stability, frequency regulation, and overall system dependability. The cuckoo optimisation algorithm has been employed to determine the optimal droop coefficients, ensuring uniform load sharing among the distributed generators. This study has identified critical gaps and provided recommendations for enhancing resilience.