TY - JOUR A1 - Sirvent, Mathias A1 - Kanelakis, Nikolaos A1 - Geißler, Björn A1 - Biskas, Pandelis T1 - A Linearized Model for the Optimization of the Coupled Electricity and Natural Gas System T2 - Journal of Modern Power Systems and Clean Energy N2 - In the following paper a combined optimization of a coupled electricity and gas system is presented. For the electricity network a unit commitment problem with optimization of energy and reserves under a power pool, considering all system operational and unit technical constraints is solved. The gas network subproblem is a medium-scale mixed-integer nonconvex and nonlinear programming problem. The coupling constraints between the two networks are nonlinear as well. The resulting mixed-integer nonlinear program is linearized with the extended incremental method and an outer approximation technique. The resulting model is evaluated using the Greek power and gas system comprising fourteen gas-fired units under four different approximation accuracy levels. The results indicate the efficiency of the proposed MIP model and the interplay between computational requirements and accuracy. KW - Electricity System KW - Natural Gas System KW - Mixed-Integer (Non)Linear Programming KW - Extended Incremental Method KW - Outer Approximation Y1 - 2017 UR - https://opus4.kobv.de/opus4-trr154/frontdoor/index/index/docId/64 VL - 5 IS - 3 SP - 364 EP - 374 ER -