Estimating future power generation unbalance in the Portuguese power system due to increasing integration of renewable sources

Integration of renewable sources in energy production avoid the use of fossil sources, which are responsible for great environmental impacts and excessive dependency of energy imported products. However, increasing integration of renewable sources in a power system can introduce some new issues in its operation, such as potential unbalancing between generation and demand, especially in off-peak periods with high levels of hydro generation. This paper presents an estimate of the future power generation unbalance in the Portuguese power system due to increasing penetration of renewable sources.