Application of stochastic load flow considering generator and branch outages under uncertainties

The intermittent nature of renewable energy sources such as wind generation and imprecise loads necessitates the incorporation of uncertainty into conventional power flow models. This paper proposes a probabilistic load flow (PLF) method for incorporating generator and line contingencies. The proposed PLF method provides the output variables distribution as probability density function (PDF) in the presence of uncertainties, which supports existing decision-making methods. Moreover, the incorporation of uncertain wind in a failing system has been investigated. Considering generator and line outages, the approach has been tested on IEEE-300 bus systems with wind turbine generators. For IEEE-300 bus system, the generators are modelled as single-state and multi-state with five states. Of the total 55 generator units, 46 generation units have been modelled as multi-state units and rest are modelled as generators having single-state.