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How to achieve 100% RES electricity supply for portugal?

Portugal is country which energy system highly depends on oil and gas imports 85% in 2005 and 86% in 2006, which drives to share of RES in total primary energy consumption of 14% in 2006. Looking only the electricity production situation is little bit better. The share of RES in the gross electricity production varies between 20-30% and it is dependent on hydro power production in wet or dry years. This paper presents energy planning of Portugal’s energy system and technical solutions for converting electricity production to 100% renewable on national scale. Planning has been based on hourly energy balance by use and adaptation of H2RES computer program. The H2RES model has ability to integrate different storages into energy system in order to increase the penetration of intermittent renewable energy sources or to achieve a 100% renewable island, region or country. Paper also represents stepping stone for studies which will give wider picture for matching renewable energy sources potential and electricity supply. The special attention has been given to intermittent sources like wind, solar and waves which should be coupled by appropriate energy storages filled by excess of produced electricity. Storage will also decrease requirements for installed power of generating units ; it will help to avoid unnecessary rejection of renewable potential and will represent certain security of energy supply.

Renewable energy ; H2RES ; sustainable energy planning ; energy storage

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