The effect of wind power generation on power prices can be felt even in periods of high price stability, as seen on the first 2 weeks of May 2010 in Spain:

Pool price

Wind power generation

Power demand

The effect of wind on prices is higher than the effect caused by the drop in demand, as seen on May 4th (Tuesday) and 5th (Wednesday) compared to the previous weekend.

Having an accurate wind power generation forecast, as the one MeteoLogica provided at 00h on May 1st (Saturday), helped traders anticipate the drop in prices that occurred the following week. Meteologica’s 15-day wind power generation forecast for Spain on May 1st is shown in blue.