Energy Mutual Networking Establishment Method Based on Hydrogen Production from Water Electrolysis Technology

Abstract

The new power system has the characteristics of a high proportion of renewable energy power generation and multi-field interconnection. In order to reduce the carbon emission level of the new power system, it is necessary to improve the flexible response capability of the system in the form of different energy carriers. Analyze the feasibility of two hydrogen energy utilization technologies such as water electrolysis for hydrogen production and carbon dioxide hydromethanation, and propose to use hydrogen as an energy carrier to form an energy mutual networking, through the transformation between renewable energy-electricity-hydrogen energy-electricity-chemical energy, the flexible response capability of the new power system can be improved, and the carbon emission level of the new power system can be reduced. The method of building the energy mutual networking on the basis of water electrolysis for hydrogen production technology is as follows: first, use renewable energy for water electrolysis for hydrogen production, and use hydrogen to supplement power generation through fuel cells when the power output is insufficient; then, capture carbon dioxide generated by thermal power generation, use hydrogen to reduce carbon dioxide to produce methane and finally, hydrogen and methane are sent to the natural gas pipeline network for reuse. At the same time, an energy storage system with an appropriate capacity is installed in the new power system to stabilize the volatility of wind-solar hybrid power generation, and the use of wind-solar hybrid energy storage power generation technology can further improve the hydrogen production efficiency of renewable energy.