Determination of minimum guaranteed purchasing price from renewable sources at distribution network buses with consideration investment dynamics

With presence of renewable energy sources (RES) in electric distribution networks, utilities have the options to purchase energy from RES units and/or directly from the wholesale electricity market. The utility´s desired purchasing price of RES energy depends on their impacts on network, and as well as wholesale market price. This paper proposes a method to determine the minimum guaranteed purchasing price of RESs energy with consideration their impacts on loss, investment deferral, and air pollution. These prices are as efficient economical signal so that lead the investors to installation of RES at buses with more positive technically impact in distribution network. The investment dynamics is also considered in the proposed method.