scope:

This Technical Report, which is informative in its nature, describes common practices and state of the art for renewable energy power forecasting technology, including general data demands, renewable energy power forecasting methods and forecasting error evaluation. For the purposes of this report, renewable energy refers to variable renewable energy, which mainly comprises wind power and photovoltaic (PV) power - these are the focus of the report. Other variable renewable energy, like concentrating solar power, wave power and tidal power etc. are not presented in this report, since their capacity is small, while hydro power forecasting is a significantly different field, and so not covered here. The objects of renewable energy power forecasting can be wind turbines, or a wind farm, or a region with lots of wind farms (respectively PV systems, PV power stations and regions with high PV penetration). This Technical Report focuses on providing technical guidance concerning forecasting technologies of multiple spatial and temporal scales, probabilistic forecasting, and ramp event forecasting for wind power and PV power.