Effective Strategy for Micro-Grid Protection Assisted Diversified Energy Resources

Abstract

Protection of micro-Grid is a future challenging issue. A fault occur at one part of micro-grid can cause the whole micro-Grid to be faulty. A protection scheme is needed which protect the micro-Grid by isolating that faulty part. Fault levels at both current and voltage parameters are different in stand-alone and utility grid connected mode. An effective protection scheme is developed for both modes in this paper. Fault levels at both current and voltage are analysed. After clearance of fault, reconnection of faulty part is also another major problem which needs to be sorted out. A reconnection scheme is also be presented in this paper. These effective protection and reconnection developed schemes are tested on system model for both utility grid connected and stand-alone mode of microgrid which are proven to be effective.