采用滑压运行方式，在180MW～600 MPa工况范围内,对某600MW超临界锅炉深度调峰不同负荷工况下受热面管壁温脉动特性进行了实验研究。根据实验数据分析了负荷工况与壁温脉动的影响,并将壁温脉动振幅率对超临界锅炉受热面运行安全稳定性进行了评估。 结果表明，随着调峰负荷降低，整体受热面管内工质流量及压力降低，受热面管工质脉动周期及脉动振幅增大，受热面管壁温脉动周期及壁温相应变化，当降至临界负荷时，受热面管工质脉动周期及脉动振幅显著增加，传热恶化，导致管壁温脉动周期及振幅显著增加，受热面管存在脉动性超温。临界负荷至机组最大出力为深度调峰区间，通过对影响深度调峰关键部件材质优化或运行优化，可适当提升锅炉深度调峰能力。

The oscillatory heat transfer characteristics of the heating surface tubes of a 600MW supercritical boiler under different load conditions during deep peak shaving were experimentally investigated under the operation mode of sliding pressure, load operation from 180 MW-600MW. According the experimental results, the effect of load conditions and oscillation of wall temperature was analyzed, and the Oscillatory amplitude ratio was evaluated for the safety and stability of the heating surface operation of supercritical boilers. The results show that as the peak load decreases, the overall flow rate and pressure of the working fluid inside the heating surface tube decrease, and the pulsation period and amplitude of the working fluid in the heating surface tube increase. The wall temperature pulsation period and amplitude of the heating surface tube change accordingly. When the critical load is reduced, the pulsation period and amplitude of the working fluid in the heating surface tube significantly increase, and the heat transfer deteriorates, leading to a significant increase in the wall temperature pulsation period and amplitude of the heating surface tube. There is pulsation over temperature in the heating surface tube. The critical load to the maximum output of the unit is the deep peak shaving interval. By optimizing the materials of key components that affect deep peak shaving or reducing the deviation of furnace flue gas load through operation optimization,operation, the boiler's deep peak shaving capability can be appropriately enhanced.

国网湖南省电力有限公司科技项目(重大专项)(5216A5220025)；