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.
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