A hierarchical control scheme based on multi-agent system for islanded multi-microgrids

With the increasing penetration of distributed generation (DG) sources and microgrids in distribution network, control and management for these units are necessary to ensure the stable operation of the power system. However, existing centralized control systems are unable to handle large numbers of distributed microsources and microgrids and thus, a decentralized control scheme called Multi-Agent System (MAS), the platform of JADE(Java Agent Development Framework) and FIPA-Contract-Net which is a interaction protocol among agents are introduced. Then this paper presents a hierarchical control scheme based on MAS consisting of three levels to cope with the problem of energy coordination of a medium voltage network comprising several microgrids and distributed generation sources operated in islanded mode. At last, a case has been implemented to verify the applicability of the control scheme when load changes.