Optimal Ratio of PV and Wind Power at a Single Grid Connection Point

In order to economically optimize the grid connection of a combined photovoltaic (PV) and wind power plant, the simultaneity of production from both renewable energy sources should be taken into account. In this work, high-resolution feed-in data from such a combined power plant was recorded and evaluated. The results allow for an estimation of maximum energy curtailment in case of an undersized point of common coupling (PCC). Additionally, it is evaluated how the ratio between the PV and the wind part of a combined power plant influences the expected curtailment losses for different PCC sizes. With this knowledge, it is possible to find a cost-optimal solution for the layout and the grid connection of a combined PV / wind power plant.