Abstract: The increased focus on environmental protection and the problem of lack of fossil energy around the world has prompted the rapid development of renewable energy power generation technology. As the proportion of renewable energy sources such as photovoltaic（PV） power generation in the power generation structure increases gradually, its impact on power system planning, operation and so on is increasingly obvious. This paper payed attention to the prospect of China power generation structure with high proportion of photovoltaic generation. And some related conclusions and suggestions have been presented to provide reference for the future power system planning and operation.