Security-Constrained Economic Dispatch for Integrated Natural Gas and Electricity Systems

This paper proposes a security-constrained economic dispatch (ED) model for integrated natural gas and electricity systems. Natural gas system is modeled and its security constraints are integrated into the ED model. The Gas Shift Factor (GSFgas) matrix is defined to reflect the impact of gas supply and load of each node on pipeline flow. The objective function for ED model is to minimize power system operating costs considering coal-fired generating units operating costs and natural gas-fired generating units (NGFGU) operating costs respectively. Numerical case studies with the IEEE 30-bus system integrated with a seven-node gas system demonstrate the effectiveness of the proposed ED model.