Security constrained unit commitment with flexibility in natural gas transmission delivery

•Linking security constrained unit commitment of power systems with natural gas transmission networks.•The hourly uncertainties in natural gas transmission are modeled by fuzzy logic.•Proposing a linear model for fuzzy decision making in natural gas transmission scheduling.•Discussing the effect of uncertainties in transmission gas system on SCUC of power systems.

This paper presents a formulation of fuzzy optimization for uncertainties in natural gas in fuel constraints for hourly individual unit and total unit fuel consumptions. Security Constrained Unit Commitment (SCUC) is usually a mixed integer programming and gas load flow has a non-linear equation a genetic algorithm is proposed to solve natural gas transmission network. A fuzzy mixed integer programming optimization is briefly discussed and adapted to deal with security constrained unit commitment schedule. Finally, two case studies are investigated (IEEE 6-bus system with 7-node natural gas transmission grid and the IEEE 118-bus power system linked with 14-node gas transmission test system) and the SCUC results are discussed and compared for the both cases of fuzzy constraints and crisp model.