Abstract: In order to analyze the capacity of distributed photovoltaic access to rural 10 kV overhead lines and reasonably determine the credible capacity of distributed photovoltaic access distribution transformers, based on the analysis of typical access modes and voltage deviation, aiming at radial overhead power grids, taking the node voltage deviation, the rated capacity of the line and the distribution transformer as constraints, and based on the topological relationship of the radial network, the correlation matrix of nodes and branches is constructed, and the method of solving the node voltage is optimized by applying the matrix method.Construct a distributed photovoltaic consumption capacity analysis model based on feeder distribution, and solve the model by particle swarm optimization algorithm for solving nonlinear programming problems.Finally, for typical calculation examples, the distributed photovoltaic capacity of each node is calculated.The results show that the model and method can assist the calculation of distributed photovoltaic consumption capacity based on feeder distribution, and provide planning guidance and construction reference for distributed photovoltaic access via overhead lines.