Journal
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Volume 10, Issue 2, Pages 646-658Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2018.2843121
Keywords
Day-ahead economic dispatch; integrated electricity and natural gas system (IEGS); reserve scheduling; renewable uncertainty; second-order cone (SOC) relaxation
Categories
Funding
- National Key Research and Development Program of China [2016YFB0901900]
- National Natural Science Foundation of China [51637008]
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For secure operation of integrated electricity and natural gas system (IECS), reserve is a useful support to manage renewable uncertainties and N - 1 contingencies. Thus, a day-ahead economic dispatch model of LEGS with reserve scheduling is presented in this paper. Considering the uncertainty of gas flow direction, a novel second-order cone (SOC) relaxation of Wey-mouth equation is designed to address the nonconvexity. Then, the proposed robust nonconvex model is mathematically transformed into a solvable mixed integer second-order cone programming (MISOCP) problem. To guarantee the tightness of SOC relaxation and achieve accurate dispatch solutions, MISOCP results are corrected accordingly by the multi-slack-node gas flow calculation with the Newton-Raphson method. Numerical cases are performed on IEEE 39-bus-15-node and IEEE 118-bus-40-node test IEGSs, demonstrating the proposed approach is feasible and effective for exact LEGS day-ahead dispatch and the proposed MIS-OCP model can provide a more economic dispatch solution with a shorter computational time than conventional MISOCP and mixed integer linear programming (MILP) models.
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