On effective rapid startup of 300 MW steam turbine unit

In this paper, a 300MW steam turbine unit is taken as the research object. After analyzing the starting process of the steam turbine unit under the original working condition, a fast optimization method of temperature rise rate is proposed. Firstly, a nonlinear mathematical model with constraint conditions is established for the start-up conditions of the steam turbine unit. Then, through the analysis of the start-up conditions under the original working conditions, the thermal stress value of the rotor under the original working conditions is analyzed, the curve of the thermal stress value is fitted, the initial value of the optimization method of the temperature rise rate is determined, and the optimization method of temperature rise rate designed in this paper is used to calculate the temperature rise rate, and two are finally determined. The most reasonable temperature rise rate optimization scheme is selected by considering the value of shortening time and effective stress. The final optimization scheme of temperature rise rate in this paper reduces the total start-up time by 55 minutes and the start-up efficiency is nearly 9.2%, which greatly improves the efficiency and economy of the start-up process.