Flexibility of Electro-Hydrogen Hub for Power System Transformation under the Goal of Carbon Neutrality

doi:10.12204/j.issn.1000-7229.2021.08.013

Abstract

Abstract:

With China already committing to peak carbon dioxide emissions before 2030 and achieving carbon neutrality before 2060, the evolution to a high-proportion new energy power system will be accelerated. Ensuring the flexible operation of is the core of the power system transformation towards a high proportion of renewable energy. As a clean, carbon-neutral, and multi-functional secondary energy carrier, hydrogen will play an important role on the flexibility adjustment of a high-proportion renewable energy power system due to its ability to inter-convert with electrical energy and achieve long-term storage. This paper systematically analyzes the evolution of power system characteristics and flexible resource requirements at various stages in the future, analyzes electricity-hydrogen conversion and hydrogen storage technology, and studies and prospects the application scenarios of hydrogen participating in the flexible regulation of renewable energy power systems.

Key words: power system transformation, green power to hydrogen, electro-hydrogen hub, system flexibility, application scenario

CLC Number:

TM61

YANG Fuyuan, TIAN Xueqin, XU Tong, WANG Xinlei, TENG Yue, WANG Di. Flexibility of Electro-Hydrogen Hub for Power System Transformation under the Goal of Carbon Neutrality[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(8): 110-117.

Figures/Tables 11

Fig.1 Development trend of renewable energy power generation in China

Fig.2 Characteristics and flexibility requirements of power systems at different stages

Fig.3 Structure diagram of green electro- -hydrogen hub

Table 1 Green electro-hydrogen hub projects in other countries

Table 2 Comparison of three typical hydrogen production technologies

Table 3 Comparison of hydrogen storage technology

Fig.4 Principle diagram of hydrogen participating in flexibility adjustment

Fig.5 Schematic diagram of grid-connected electro-hydrogen adjustment system

Fig.6 Comparison of characteristics of electro-hydrogen hub and other energy storage

Fig.7 Structure diagram of electro-hydrogen hub participating grid-connected wind power system

Fig.8 Structure diagram of electro-hydrogen hub participating grid-off wind power system

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