Abstract: With the increasing proportion of renewable energy power generation accessed in medium and low-voltage distribution networks, as well as the massive application of power electronic impact and nonlinear loads, the power quality problems in modern distribution networks have received widespread attentions. In this paper, three typical power quality problems, namely, voltage quality problem, three-phase unbalance problem and harmonic resonance problem, are selected to be outlined. Combined with the research status at home and abroad, several corresponding solutions are sorted out for each problem. Finally, it is concluded that the power quality problems in new energy distribution networks arise from the large-scale application of power electronics technology. However, power electronic solutions will play an important role in dealing with the power quality problems in the future distribution networks.