Adaptive grid resilient based protection method for multi fault scenarios in medium voltage quintuple DC microgrid system

Abstract

Abstract Multi-microgrid systems offer a versatile solution to many of the challenges including issues on power glitches, grid flow optimization, stability and protection system malfunction faced by traditional centralized power grids. By enhancing resilience, integrating renewable energy, improving efficiency, and supporting economic and environmental goals, they represent a forward-looking approach to modern energy management. Despite of technological progress in fault current detection, significant challenges oriented to false tripping and protection blinding in multi- microgrid structures compared to single microgrid topology still remain unresolved. The primary aspects that require focus while multigrid resilience includes fast fault detection and interruption, nuisance tripping and blinding of protection. This paper enhances the fault isolation speed by proposing adaptive grid resilient scheme (AGRS) with fault identification method using level order tree traversal (LOTT) and Bidirectional Dial’s algorithm, which functions with the assistance of MGMFDS (Microgrid Monitoring Fault Detection System). The presented work analyses the implementation of the proposed adaptive algorithm and tested for various types of faults in a 35-bus quintuple system, where its efficacy in interrupting the fault takes 2.64 ms. The experiments for the proposed work are conducted using a real time simulator for model in loop (MIL) and control hardware in loop (CHIL) testing.