Brief Analysis of Seasonal Correlations in the Power Generation Data of Photovoltaic Power Stations

Correlations in the power generation of photovoltaic (PV) power stations could improve the PV power utilization in electric power systems and reduce the occurrence of PV power dumping and throttling. In this study, the seasonal correlations in the PV power generation data of the Hanergy Xinhe PV power station in Xinjiang are investigated from a temporal perspective. Firstly, the PV output curves of the power station in typical weather conditions, i.e., the sunny day and non-sunny days, are analyzed. And then, after the presentation for the basic description of correlation theory, the correction of PV generation in the viewpoint of season is presented. The resulted with the field data shows that, for the sunny days, the correlation between autumn and spring data is much stronger than the correlation between winter and summer data, and for the non-sunny days, the correlation may be small. (paper)