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Most renewable energy sources are intermittent by nature and limited controllable and therefore increase the risk of increment imbalance when integrated in the production portfolio. When imbalance increases, higher imbalance fees are payed to the Transmission System Operator (TSO) and will result in higher incremental costs. This study is to determine the influence of an intelligent dispatch of the production portfolio of Electrabel NL on the imbalance reduction and economic dispatch. The result is an cost comparison based on a number of normal operating days The second part evaluates the influence of the integration of 5%, 15%, and 25% of intermittent sources in the production portfolio. There are three scenarios simulated: no forecasting, persistence forecasting and perfect forecasting of the wind power output.