With a large number of active loads connected to the low voltage distribution network（LVDN）

the problem of power quality has become more and more serious and attracted wide concerns. As for the issue of the serious harmonics due to connection of a large number of distribution power supply in the low voltage distribution grid

in this paper a kind of PV inverter control strategy based on virtual resistance harmonic suppression is proposed so to keep the PV inverter

in addition to power generation function possess the function of actively suppressing harmonics. Firstly

the harmonic extraction method based on virtual resistance is proposed. The harmonic current compensation signal is obtained by detecting the voltage harmonic value at the grid-connected point divided by the virtual resistance value for current inner loop control. Then

the existence of best resistance and the search method are analyzed by the Norton’s equivalent theorem so to keep the absorption harmonic power maximum and total distortion of voltage minimum by way of adjusting virtual resistance. Finally

the effectiveness of the method is simulated and experimentally verified.