Autors: Antchev, M. H., Pandiev, I. M., Petkova, M., Stoimenov, E. C., Tomova, A., Antchev, H. M.
Title: PLL for single phase grid connected inverters
Keywords: DDS, FPAA, single-phase inverter, phase detector, phase locked-loop, utility grid, VCO

Abstract: In grid connected applications the synchronization of output signals of the converters to be connected with grid parameters - frequency and phase is of great importance. Different methods based on Fourier transforms, zero-crossing detection, Kalman filters, phase-locked loops (PLL), and others are used for this synchronization. This paper presents a new PLL for synchronization of the output current of single-phase grid connected inverters with the utility grid voltage. It is based on trigonometric transformations - sine and cosine functions in a phase detector block. The proposed method’s simplicity and efficiency are proved by means of computer simulations and experimental analysis. The practical realization of the PLL is based on analog and digital programmable devices. Simulation and experimental results show good agreement with the results obtained by the theoretical analysis.



    International Journal of Electrical Engineering and Technology (IJEET), vol. 4, issue 5, pp. 56-77, 2013, India, International Association of Engineering and Management Education (IAEME), ISBN 0976 – 6553

    Цитирания (Citation/s):
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