Abstract: the harmonic pollution generated by distributed photovoltaic grid-connected systems severely affects the power quality of the grid. to address the harmonic issues caused by the nonlinear characteristics of inverters, a hybrid active-passive filtering compensation strategy combined with a fuzzy adaptive harmonic detection algorithm is employed. by constructing an experimental platform to test power quality indicators under various operating conditions, the results demonstrate that the hybrid compensation scheme significantly reduces the total harmonic distortion rate, effectively controls voltage fluctuations, and improves the power factor, providing an effective solution for distributed photovoltaic grid integration.