Real-time subsidy based robust scheduling of the integrated power and gas system
Document Type
Article
Date of Original Version
2-15-2019
Abstract
In this work, a real-time subsidy based robust scheduling method for the integrated gas and power system is proposed. Bi-directional energy conversion, including the power-to-gas and gas-fired generation, is operated via dynamic variant price signals. The gaming between the electrical power system and the natural gas system is formulated in the bi-level optimization. The upper-level problem minimizes the operational cost, in which the real-time subsidy for power-to-gas and gas-fired units is obtained. The lower-level problem maximizes the profit for the power-to-gas and gas-fired units, in which the transient gas flow is introduced. In addition, in order to counter the uncertainties brought on by wind power, a real-time subsidy update strategy based on robust optimization is proposed to stimulate the regulation capabilities of the power-to-gas and gas-fired units. This bi-level optimization is reformulated as a mixed-integer quadratic programming problem using the Karush-Kuhn-Tucker optimization conditions. Simulation results show that the real-time subsidy scheduling can make power-to-gas and gas-fired units follow the system operator's preferences such as wind power accommodation, mitigation of unsupplied load, and relieving network congestion.
Publication Title, e.g., Journal
Applied Energy
Volume
236
Citation/Publisher Attribution
Shu, Kangan, Xiaomeng Ai, Jiakun Fang, Wei Yao, Zhe Chen, Haibo He, and Jinyu Wen. "Real-time subsidy based robust scheduling of the integrated power and gas system." Applied Energy 236, (2019): 1158-1167. doi: 10.1016/j.apenergy.2018.12.054.