Smart Micro-grid System with Wind/PV/Battery

Abstract

A 6kW smart micro-grid system with wind /PV/battery has been designed, the control strategy of combining master-slave control and hierarchical control has been adopted. An energy management system based on battery SOC has been proposed for the smart micro-grid system so that the management functions, such as measurement and testing, protection, operation mode selection, power supply control and load management of the smart micro-gird, can be realized. The performance of the micro grid and the control strategy presented in the paper has been demonstrated and verified in various operation modes, including direct supply of wind and solar energy, energy feedback to grid, power supply from battery, power supply by external power grid and load limitation modes.