Abstract
In this article, a synchronous rotating-frame based phase-locked loop (PLL) for a single-phase PV inverter control system is presented. Detailed PLL mathematical model and the digital implementation for a single-phase PV inverter system are presented. A practical solution for transport delay based orthogonal signal generation using first-in-first-out (FIFO) circular buffer is also discussed. Details of implementation for a real-time system using digital signal processor were also described. The performance of the developed PLL was experimentally verified on a developed single-phase PV inverter prototype.
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Zhongfu Zhou
Zhongfu Zhou received the Ph.D. degree in Power Electronics from Sussex University, UK in 2004 then he joined Swansea University as a research officer. Presently, he is a lecturer in power electronics in the college of engineering at Swansea university, UK. His current research interests are in power electronics converters and real-time control for solar and wave power conversion systems, active power filter, active front-end rectifier, electrical machine control as well as power systems. He has published over 50 scientific papers in various international journals and conferences.