A Survey on the Spanish Electricity Intraday Market

The Spanish electricity intraday market presents a particular design that makes it unique in Europe. The study is carried out on an hourly basis in order to identify hourly patterns in prices and traded quantities by session. The study evidences an overall growing interest from market participants in intraday trading, particularly in the last-time- negotiated hours. Prices exhibit hourly and daily seasonality as well as mean reversion. Going in depth into the analysis of the current electricity intraday markets is of great relevance nowadays given that there is an open debate concerning the optimal design for intraday markets all over Europe as a consequence of the wholehearted integration of renewables into the power system.