Smart Battery Management System for Enhancing Smart Micro Grid Performance and Energy Management

Energy storage system (ESS) is an essential component of smart micro grid for compensating intermittent renewable generation and continuous power supply. Batteries are most commonly used in ESS. For optimal energy management of micro grid, the optimization algorithm needs knowledge of battery parameters like state of charge (SOC), voltage, temperature etc. Further for implementing various control and stability strategies, there is need of communication of battery parameters among various components of micro grid. With knowledge of battery parameter, grid operator can make better utilization of available ESS resources and also reduce renewable curtailment. A smart battery management system (BMS) is developed which calculates and communicates battery parameters. Various communication protocols namely Modbus, CAN, Ethernet and Wifi are incorporated in the smart BMS which makes it compatible for many applications. Smart BMS additionally performs active cell balancing using cell to cell balancing topology. The BMS is successfully implemented in a smart micro grid in India and the findings of the implementation are discussed in this paper. They serve as the foundation for further implementation of optimal energy management in the smart micro grid for minimizing operation costs.