Coordinated Scheduling for Integrated Power and Nature Gas System with Power-to-Gas Considering DPR Costs

The development of power-to-gas technology provides new ideas for alleviating the problem of wind power and photovoltaic power curtailment. In this paper, the power-to-gas process is divided into two modes: power-to-hydrogen and power-to-natural gas, and the characteristics of the two modes are analyzed for the systems with different wind power ratios. For the integrated power and nature gas system with power-to-gas, a multi-objective optimal scheduling model that takes into account the environmental cost is proposed. And the additional costs of deep peak regulation (DPR) of generators are considered in the model of costs. In addition, the impact of the price of natural gas on optimization results of the system is also considered and the economic and environmental benefits of power-to-gas are analyzed. Finally, the rationality of the proposed model is verified through the case studies, which comprehensively shows that the power-to-gas is promising application.