Long-term expansion planning of integrated electricity and natural gas transportation infrastructures

This paper presents an integrated long-term expansion planning model that considers the interdependency of natural gas and electricity infrastructures. The integrated planning problem determined the least-cost planning schedule of candidate generating units, transmission lines, and natural gas pipelines. The fuel supply feasibility was represented by the natural gas transportation constraints. The Investment decisions of electricity and natural gas infrastructures would satisfy the desired power system reliability criterion. Numerical simulations demonstrate the effectiveness of the proposed integrated planning approach.