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In the paper an estimation of the correlation between power generation from wind and photovoltaic farms distributed over a large area has been presented. The climatic and morphological conditions for the considered area are similar to the Polish conditions. The initial analysis of data provided by distribution system operators indicates that a negative correlation between wind and PV energy generation exists when a longer period of averaging is assumed. Additionally, the maximum value of generated power has never reached the level of installed capacity. Considering the system, where a significant number of wind and photovoltaic farms are installed, an assumption that total generation sources capacity is achievable can lead either to grid curtailments or to grid development overinvestments.

Complementarity of Wind and Photovoltaic Power Generation in Conditions Similar to Polish