Abstract: A lot of distributed photovoltaics are connected to the medium and low voltage power grid, which brings heavy overload of distribution transformers and Voltage over-limit problems. To solve this problem, Carry out comprehensive analysis and research on power quality of distributed photovoltaic, Set up a series of demonstration projects of AC/DC convergence, single multi-household inverter, Public/specialized transformer boosting, Single point/Multipoint grid connection, and supporting energy storage. With the Overall development of distributed photovoltaic in Si Qian Guan Zhuang village as a pilot project, carry out power quality management, and Simultaneously supporting the construction of low-voltage energy storage, Which is used for realizing smooth power regulation of the power station. In order to solve the problem of frequent voltage exceeding the limit caused by Low voltage grid-connected distributed photovoltaic, proposed control strategies, developed regulation control procedures, completed the power quality regional autonomous pilot of integrated terminal in the distribution network, power transformer with OLTC, smart capacitor,and inverter, built a flexible control of distributed photovoltaic system and Regional autonomy of power quality demonstration project based on "whole village + photovoltaics + energy storage"strategy.