Under the new energy situation

the proportion of wind power generation and photovoltaic power generation is increasing

and the peak load regulation pressure of thermal power plants is increasing.In order to meet the increasing demand of deep peak load regulation

a thermal power plant carries out an ultra deep peak shaving test

and realizes the stable operation of 20% rated load and 15% rated load under the condition of stable combustion without oil.This paper optimizes the scheme of the deep peak load regulation test

combined with the parameters and problems in the deep peak shaving test

it summarizes the matters needing attention in the deep peak shaving operation of thermal power units

which can be used as a reference for similar units.