Evaluation of Distributed Photovoltaic Admission Capacity in Distribution Grid Considering Uncertainty

Under the background of “Carbon peaking and carbon neutrality” goals, new energy is widely utilized, especially distributed photovoltaic. The large-scale integration of distributed PV into the distribution grid is a trend for the future distribution grid. Therefore, the calculation of distributed PV admission capacity in the distribution grid is an important issue in distribution grid planning. This paper first establishes an output probability model based on the randomness and uncertainty of distributed PV and load output power. Then handle the correlation between distributed PV and load. The constraints are constructed and added to the PV admission capacity calculation model, and the stochastic weighted particle swarm optimization algorithm is used for solving the model. Finally, the factors influencing the distributed PV admission capacity in an IEEE 33-bus distribution grid are analyzed.