Photovoltaic power as a clean pollution-free renewable energy, its development is attentioned by more and more Speople. Due to the randomness of photovoltaic plant, it would have an effect on the quality of power supply when it connected to grid. The essay comes up with two different plans about the 60 MWp photovoltaic power connect to region grid in some area of Hami. By using PSASP simulation the grid. Analysising two different access scheme under the condition of minimum and maximum mode of operation to discuss the load flow and short circuit current influence when it connected to grid, combination with the economical comparison put forward reasonable access scheme, and supply suggestion to improve the power quality.