With the continuous increase in the proportion of the installed capacity of renewable energy in the Ningxia region,a new structure of the power system is gradually emerging.Thermal power units must adapt to the operation mode of deep peak shaving in daytime and peaking at nighttime.Loads are at the highest at morning and evening time and stay low at other times,which requires thermal power units with high pa-rameters and large capacity to be able to carry out deep peak shaving at 30%load.Taking the deep peak shaving at 30%load of a plant's 2×660MW ultra-supercritical single-train auxiliary unit as an example,this paper analyzes the risks in safe operation of boilers,turbines and electrical systems during deep peak shav-ing,and proposes control and improvement measures.Finally,the plant successfully passed the certification of deep peak shaving capability at 30%load.
维普
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