Distributed photovoltaic power generation is susceptible to light and temperature, with intermittent, volatility and uncertainty. Therefore, distributed photovoltaic grid connection may cause voltage fluctuation and flicker in the distribution network, affecting the economic, safe and stable operation of the power grid. Based on the research results at home and abroad, the related concepts of distributed power generation clusters are summarized, and the current methods of dividing distributed photovoltaic clusters and the current control methods for distributed photovoltaic power generation clusters are introduced.