In order to discuss the impact of different wind turbine types on grid-side power quality, some power quality problems caused by different wind turbine types are studied, such as grid-side voltage deviation, voltage fluctuation and harmonic. Based on PSCAD/EMTDC, the grid-side power quality simulation models were built respectively for the fixed-speed wind turbine which could switch reactive power compensation device, as well as for the variable-speed wind turbine which could operate under constant power factor or given reactive power. The simulation analysis of grid-side voltage deviation, voltage fluctuations and harmonic characteristics shows that, the wind farm with fixed-speed wind turbine has more significant effect on grid-side voltage deviation and voltage fluctuation than that with variable-speed wind turbine, but could cause serious harmonic pollution. The research results can provide a theoretical basis for the power quality management strategy according to different kinds of wind farms in China and the power quality management for regional power grids.