Abstract
This paper presents a stochastic based power dispatch problem for optimizing the operation of a hybrid power system. This system includes conventional generating units as well as wind turbines and photovoltaic systems. The uncertainty of wind and solar power is considered in the renewable energy sources’ operating cost. This is achieved by introducing the underestimation and overestimation costs which are based on the Weibull and Beta distribution for wind and solar output power, respectively. The constraints taken into account are transmission losses, generation limits, ramp rate limits, valve-point effects and spinning reserve constraints. The power dispatch problem is solved by the hybrid mean variance mapping optimization algorithm (MVMO-SH). The impact of renewable energy sources penetration in existing power systems is investigated through three different case studies.
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