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Coordination of Electricity, Heat, and Natural Gas Systems Accounting for Network Flexibility

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Existing energy networks can foster the integration of uncertain and variable renewable energy sources by providing additional operational flexibility. In this direction, we propose a combined power, heat, and natural gas dispatch model to reveal the maximum potential “network flexibility”, corresponding to the ability of natural gas and district heating pipelines to store energy. To account for both energy transport and linepack in the pipelines in a computational efficient manner, we explore convex quadratic relaxations of the nonconvex flow dynamics of gas and heat. The resulting model is a mixed-integer secondorder cone program. An ex-post analysis ensures feasibility of the heat dispatch, while keeping the relaxation of the gas flow model sufficiently tight. The revealed flexibility is quantified in terms of system cost compared to a dispatch model neglecting the ability of natural gas and district heating networks to store energy.

Author(s):

Anna Schwele    
Technical University of Denmark
Denmark

Adriano Arrigo    
University of Mons
Belgium

Charlotte Vervaeren    
University of Mons
Belgium

Jalal Kazempour    
Technical University of Denmark
Denmark

Francois Vallee    
University of Mons
Belgium

 

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