Abstract: The proportion of distributed photovoltaic connected to the grid is gradually increasing，which brings

a series of problems，it can draw lessons from foreign experience to provide practical reference for solving relevant

problems. As one of the leading countries of energy transformation in Europe，Germany's experience in renewable

energy act and distributed photovoltaic access standards was summarized. Then，the performance and impact of

distributed photovoltaic and anti-islanding protection in the process of the "8·9" blackout case in London，UK was

combed. Finally，combined with the relevant foreign experience，renewable energy development policy of China，and the problems caused by the high proportion access of distributed photovoltaic to grid operation，some suggestions on voltage distribution and control of distribution network，access standard of distributed generation，anti-islanding protection，coordination between owners' interests of distributed photovoltaic by user side and grid operation were put forward.

Key words: distributed；photovoltaic；high proportion access；renewable energy；anti-islanding protection