Abstract: Against the backdrop of energy structure transition driven by the dual carbon goals and the large-scale grid integration of new energy sources, the flexible peak regulation capability of 350 MW combined heat and power (CHP) units is crucial for power system stability due to their efficient energy utilization and stable output characteristics. This paper elaborates on the importance of CHP units in improving energy efficiency, facilitating energy conservation and emission reduction, and ensuring electricity and heat supply, analyzes the necessity of flexible peak regulation for power system stability, and points out that they can maintain power balance through multi-dimensional regulation. It sorts out the current status of flexible peak regulation technologies for 350 MW units, including the innovation and application of technologies such as circulating fluidized bed composite combustion, combustion optimization adjustment, and wide-load operation design. The paper further deeply analyzes the technical challenges such as equipment safety, heat-power decoupling, low-load efficiency and emissions, as well as issues like the balance between renovation costs and benefits, the impact of electricity market pricing mechanisms, and policy management. It prospects the development trends, emphasizing the importance of the integration of intelligence and automation, the research and development of new peak regulation technologies, the collaborative integration of multiple technologies, and the coordinated development with new energy, providing a reference for improving unit peak regulation capabilities and promoting the green transition of energy.

    Key words: dual carbon; combined heat and power; flexible peak regulation; power system stability; coordinated development of new energy