Jetnarong PongpaiboonThamvarit SinghvilaiSupun TiptipakornChuttchaval JeraputraMahidol University2022-08-042022-08-042021-05-19ECTI-CON 2021 - 2021 18th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology: Smart Electrical System and Technology, Proceedings. (2021), 551-5542-s2.0-85112790951https://repository.li.mahidol.ac.th/handle/20.500.14594/76661The phase lead-lag synchronous PLL for grid connection of a single-phase inverter is proposed. The method employs tuned filters that advance and delay phases by ±45 degrees with respect to the phase of the grid. Both orthogonal signals are fed into the Park's transformation. The quadrature-phase signal is regulated to zero using a PI controller which its output determines the frequency. The phase is obtained by integrating the frequency. The proposed method is validated by simulation using MATLAB/Simulink. It is implemented on a microcontroller and tested with a programmable AC source. The results confirm the viability and effectiveness of the method.Mahidol UniversityComputer ScienceEngineeringPhysics and AstronomyConference PaperSCOPUS10.1109/ECTI-CON51831.2021.9454839