ARM based implementation of sogi-fll method for power calculation in single-phase power system

For the proper and stable operation of a microgrid, an accurate estimation of the key parameters under various disturbances is the most important task for the rest of the control blocks. In this paper, a SOGI-FLL scheme aimed for voltage and current parameters estimation in single-phase power system is implemented using high speed ARM microcontroller. The main contribution in this work is the ability of the proposed SOGI-FLL scheme to estimate, with high precision, the stationary reference frame αβ components of the load voltage and current at the fundamental frequency. The active and reactive powers are calculated using the extracted components, which can improve their accuracy and speed. Practical evaluation is presented as case studies in order to test the effectiveness of the SOGI-FLL under various load conditions such as load change, amplitude jump and frequency variation. The obtained results have demonstrated that the proposed SOGI-FLL scheme can estimate the expected parameters with excellent filtering capabilities and faster response time.