Proposed new dynamic power insertion method for stabilized power generation based on battery energy storage system
The solar energy is clean and future energy for electricity generation. Its energy has enormous potential but do not optimal to utilized caused by intermittent energy. The intermittent radiance and ambient temperature influence the energy produced fluctuates and unstable. These power fluctuations affect system stability and frequency. To overcome this problem, several methods for PV power stabilization have been developed. One of them is the Stabilized Power Generation where PV output power is to a certain power value. The result of SPG method is reducing in PV power fluctuations but still unstable. For reaching the stable condition of PV Power output, the Dynamic Power Insertion method is proposed which is a modification of the SPG method with energy storage batteries. DPI improve the SPG method and make PV power stable with active power management with charge and discharge action. The battery is using as energy storage when PV power is larger than Power limit. On the other hand battery as an energy source for active power insertion at PV power is smaller than Power limit. Thus the output power in each condition can be maintained as Power PV equals to P limit. For test this method, DPI modules are built on ARM lpc1768 NXP and monitored with the Thing speak webserver (simulated with Simulink MatLab Software). The experimental results of DPI can stabilize PV power fluctuation at its setting power with an error of 5 percent.