The Research on P2G Gas-Electric Hybrid Optimal Economic Dispatch Strategy

Abstract

In many forms of the multi-energy complementary system, the regional multi-energy complementary distributed energy distribution system including distributed photovoltaic power generation (PV) and power-to-gas (P2G) equipment is a typical form. The P2G system uses non-peak excess power to produce hydrogen gas. Hydrogen can be stored directly for use as fuel, or it can be converted to natural gas for storage, enabling conversion of electrical energy to chemical energy. In this paper, the energy conversion and interconnection between electric energy and gas realizes the coordinated operation of distribution network and natural gas network, reduces the distribution pressure of distribution network, and improves the economic efficiency of energy utilization. First, the principle of P2G technology is introduced, and then the mathematical models of source device, conversion device and energy storage device are constructed separately. On this basis, an economic optimization-based micro-network system optimization scheduling model is established to investigate the economic benefits of gas-electric hybrid. Finally, the micro-grid system of the two scenarios is compared in the example, and the results prove that P2G has a good promotion effect on the economic benefits of the park.