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Modeling of the electric power system of Crete under large penetration of RES and electric vehicles

Karandinou Aikaterini-Agapi

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Summary

The main purpose of this paper is to model the existing non-interconnected electric power system of Crete with the existing integrated photovoltaic and wind power plants, as well as to examine the effect of different scenarios of penetration of plug-in electric vehicles. Furthermore, another goal is to achieve load power demand management by appropriately shaping electric vehicles load profile with smart charging techniques. Three different scenarios for the penetration of plug-in electric vehicles are examined and they are distinguished in the most probable, most optimistic and the most aggressive in terms of the considered electric vehicle population. In this work we try to implement two plug-in electric vehicle charging strategies: “Dumb” Charging. It is considered the simplest form of charging and the plug-in electric vehicle absorbs a constant amount of power throughout the charging period. “Smart” Charging. Controlled charging is applied with main objective to balance the load curves and limit fluctuations. In particular, the methods that have been applied are that of valley filling (increase of plug-in electric vehicle load during low demand periods) and peak shaving (reduction of plug-in electric vehicle load during high demand periods).The proposed algorithm has been developed in Matlab software while Matpower was used to solve the optimal Power Flow problem. The main simulation results obtained by the detailed simulation of Crete electric power system concern:• Plug-in Electric Vehicles Loads • Total and net electric power load of Crete • Bus Voltages• Power Losses • Fuel Cost of electric power generation units• Plug-in Electric Vehicle charging cost

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