Renewable energy sources especially solar is intermittent in nature, since the solar irradiance are not constant due to clouds movement, therefore the output power of PV plant fluctuates. When this type of intermittent source injects power into the grid, it causes imbalance in the system. Therefore, in this paper an energy management system (EMS) is designed for PV power smoothing. The energy management is performed by using moving average and low pass filter techniques for PV power smoothing. The system comprises of 6 kW solar array connected to DC bus with the help of DC – DC converter, which is controlled by incremental conductance technique for maximum power point tracking. A battery energy storage system (BESS) is used with current controlled bi-directional converter for charging and discharging, here a 200 V battery is used to support a 500 V DC bus. Further this power is fed to grid by using an inverter. The EMS uses moving average and low pass filter techniques to generate the smooth reference power, which is compared with actual PV power for charging and discharging of BESS. This paper presents the simulation study for energy management of BESS with grid connected PV system. The results conclude that energy management with low pass filter technique is better than the moving average for PV power smoothing.
Volume 12 | 05-Special Issue
Pages: 46-55
DOI: 10.5373/JARDCS/V12SP5/20201734