期刊
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
卷 9, 期 3, 页码 1061-1071出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2017.2764004
关键词
Robust security-constrained unit commitment; distributed natural gas storage; pipeline constraints; second-order cone
资金
- State Key Program of the National Natural Science Foundation of China [51537010]
- Science Technology Program of State Grid Zhejiang Electric Power Corporation [5211SX1500R4]
A robust security-constrained unit commitment (robust SCUC) model is proposed in this paper to enhance the operational reliability of integrated electricity-natural gas system (IEGS) against possible transmission line outages. In this work, adjustable capability of natural gas contract is considered to avoid dramatic changes in real-time gas demand. Distributed natural gas storage is also included to smooth out power system demand curve and further improve operational efficiency at normal state and during contingencies. Nonlinear and nonconvex natural gas flow functions are relaxed into second-order cone (SOC) constraints, then the SOC-based column and constraint generation method is adopted to solve the proposed two-stage robust convex optimization problem. In this iterative method, the security-check subproblem feeds back worst case constraints to the first-stage master problem, until no violated scenarios can be detected. Simulations tested on 6-bus-6-node and 118-bus-10-node IEGS with natural gas storage show that the proposed storage model is effective in the robust SCUC solution for IEGS considering possible N - k contingencies with limited natural gas adjustments.
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