Stochastic Scheduling of Hybrid Power Stations in Insular Power Systems With High Wind Penetration

Increasing wind penetration in non-interconnected power systems represents a techno-economic challenge for system operators. To accommodate the increased variability and uncertainty adequate reserve levels and advanced solutions that increase the controllability of wind power output, such as hybrid power stations, are used to ensure system stability. This paper presents a two-stage stochastic optimization model for the joint scheduling of energy and reserves of conventional units and hybrid power stations in insular power systems. The proposed methodology is based, in general, on the recently established regulatory framework for the non-interconnected island systems of Greece. The main scope of the paper is to analyze wind and pumped-storage solutions for the normal operation of saturated insular power systems. In this context, the introduction of hypothetical hybrid power stations in a real-life system, the insular power system of Crete, Greece is examined. Test results are analytically presented and thoroughly discussed.