Protection of Inverter Interfaced Microgrids: Challenges and Solutions

Recently, the protection of Inverter-Based Microgrids (IBMs) has attracted a lot of attention. It is partly because the penetration level of Inverter-Based Recourses (IBRs) is increasing continually and partly because of different and sometimes unusual behavior of these resources under fault conditions. The distinctive fault characteristic of IBRs makes the protection of the inverter-based microgrids rather uniquely challenging. This paper tries to shed light on the current challenges in the protection of the IBMs by providing time-domain simulations. Two possible solutions to address some of the main challenges are also discussed by providing simulation-based results using MATLAB Simulink software.