A novel active power filter for selective harmonic suppression based on a robust PLL Algorithm

Distributed Generation (DG) based on renewable green energy is expected to grow at an unexpected rate. However increasing penetration of DG to the power grid has issued power quality of power system. Among the power quality problems, the harmonic current may corrupt the power system which is connected to the grid. Accordingly, the performance of DG systems must be improved to meet the grid codes in each country. In this paper, a novel selective harmonic suppression method based on a robust PLL Algorithm is proposed and demonstrated using PSIM. The proposed algorithm is applied over the harmonic current detection of a nonlinear load. Now 10kW prototype active power filter (APF) is set and verification experiment will be conducted with the nonlinear load.