Because of increasing attention to environmental pollution globally, renewable energies such as wind and solar in the electricity supply have risen drastically. On the other hand, due to uncertainty in the amount of renewable energy production and the role of flexible gas power plants in compensating for the possible shortage of production of renewable power plants, both energy carriers’ consumption needs have a direct impact on each other. Therefore, to ensure efficient energy supply and optimal operation of electricity and gas networks, integrated network operation is necessary. Also, because of unbalanced consumption and the need for high investment to supply energy only for limited hours and low efficiency of equipment, demand response (DR) is more important as an effective method for reducing the cost and management of congestion. In this chapter, the types of DR and its linear and nonlinear modeling in the electricity and gas networks during the simultaneous operation of the gas and electricity networks are investigated. Finally, in order to investigate the effect of DR implementation on the simultaneous operation of electricity and gas networks in an integrated test system, DR with non-demand response was compared.
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