Application Analysis of Energy Storage Technology for Coal-Fired Combined Heat and Power Generation Under Carbon Peak and Neutrality Goal

Abstract

[Introduction] The goal of "carbon peak and neutrality" will require profound changes in the existing energy structure. Improving the flexible adjustment capabilities of the original coal-fired cogeneration units is one of the essential elements in ensuring the safe grid connection of new energy power. [Method] This paper reviewed the flexible adjustment requirements of the coal-fired cogeneration system, the current status of potential energy storage applications, and the development direction of coupled energy storage technology. [Result] It is concluded that the deep "thermoelectric decoupling" is still the key to improving the coal-burning cogeneration system. Secondly, to meet the "source-charge" matching, energy storage technology will play an essential role in the coal-fired cogeneration system, among which energy storage technology with potential application mainly includes heat storage, electricity storage, and flywheel energy storage. [Conclusion] Finally, according to the application characteristics of coupled energy storage technology for coal-fired cogeneration units, the paper puts forward suggestions on the aging of energy storage performance, absorption of new energy, long-term change of thermal power load in the expansion area, economic analysis of initial investment, and payback period and relevant issues needing attention.

Keywords

• low-carbon target
• coal-fired combined heat and power generation(chp)
• energy storage technology
• thermoelectric decoupling
• application analysis