A robust and efficient PLL algorithm for single-phase grid-connected renewable energy sources

摘要: An accurate and robust efficient transport delay based phase-lock loop (TDPLL) is proposed for single phase grid-connected renewable energy sources. Although the conventional TDPLL has low complexity with smooth fast transient response, its performance significantly affected by any deviations in grid normal frequency. The of against frequency variations. method uses two delays instead one order to cancel variation effect while it requires fewer calculations than TDPLL. A tune parameters presented. effectiveness PLL validated through simulations experimental results.