To avoid the instability of micro-grid operation

research on control strategy for super capacitor bank energy storage device connected to the micro-grid is carried out. Energy storage device connects DC/AC converter by super capacitor bank throughing bidirectional DC/DC converter

through filtering

even after boosting connect into grid. By studying on control of bidirectional DC/DC converter sliding mode

it makes it possible to work under any operating conditions

and to analyze on running stability. Bye Matlab

Simulink simulation model for energy storage system is built to verify the feasibility of the control strategy.