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Optimization of power feed-in curtailment from RES and its consideration within grid planning

This paper presents different new formulations of dynamic optimal power flow for power feed-in curtailment of RES that are applicable in distribution grid planning. Therefore, a method for dynamic curtailment is presented using AC distribution factors and afterwards optimized using linear programming. The optimal power flow formulations minimize the annual curtailed energy under the boundary condition of a maximum active power flow, the annual curtailed energy and the combination of both. The results on a 5 bus test system show that overloading of lines can be prevented using dynamic curtailment with a small amount of curtailed energy. Therefore, the optimal power flow formulations can be used by distribution system operators to plan their grid using different ways to increase the hosting capacity of renewable energy sources.