Abstract

The coupling and complementary utilization of multiple energy sources is the basis of energy structure optimization, and the accommodation of renewable energy is the key issue in power system industry. In this paper, through the cooperation of gas turbine (GT) and power-to-gas (P2G) equipment, an integrated natural gas and electric power system (IGES) with bidirectional energy transmission is constructed. The gas turbine is used as the peak shaving unit of power system, and the excessive wind power is accommodated by P2G, which is converted into natural gas stored in gas storage tanks (GST). The contract model is proposed to regulate the natural gas in GST injected to pipeline network generated by P2G. Finally, the 14-bus natural gas system (NGS) and the IEEE-14-bus electric power system (EPS) are used to construct the IGES system with the mode of Electricity-Orientated. Aiming at the optimization of economy, by comparing the wind power accommodation in two scenarios, it shows that P2G can effectively accommodate wind power, and that injecting natural gas generated by P2G into gas network by contract can reduce the uncertainty of gas network dispatching.

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