Abstract
The coordination of electricity and natural gas systems has ever been intensifying due to a growing share of natural gas-fired generating units in electricity production. Accordingly, concerns of the interrelationship between the coupled electricity and natural gas markets are emerging. Given this background, an Integrated Energy System (IES) with gas turbines, combined heat and power systems (CHP), distributed generation units, power-to-gas (P2G) facilities and multi-energy storage systems (ESSs) is first described. The operation strategy for the IES is investigated in a low-carbon context. Then, the Copula method is employed to model the joint probability distribution of electricity and natural gas prices. An optimal operation strategy of the IES is proposed to minimize the total operating cost, with the interdependence structure of electricity and natural gas prices well taken into account. Finally, a solution approach and case studies are presented, and the effectiveness of the proposed method demonstrated.
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