Grid-connected peak-load compensation system based on lithium-polymer battery

The conventional battery energy storage system (BESS) has many limits due to weight, size and low energy utilization resulted from battery characteristics. To solve this problem, we proposed a grid connected peak-load compensation system with high discharging current characteristics based on lithium polymer battery for development of the next generation power station. The lithium-polymer battery has faster discharging current characteristics than conventional battery, so that can compensate high active power demanded by load in a short time using the low capacity battery bank. Therefore, it is possible to control power leveling of grid by measuring stored energy in battery and active power which is needed from load. The validity of proposed system is verified through the simulation and experiment.