Frequency response model considering large frequency deviation

Large frequency deviation affects the output of auxiliary equipment of thermal power plant, which in turn will impact the operational security and stability of thermal power plant. This paper focuses on analyzing the relationship between out power and frequency of auxiliary equipment. The actual operating data is the base of determining the relation between system frequency and the output of feed pump. The input of coal is determined by the output of feed pump. Simulation models considering boiler and auxiliary equipment are built by simplifying the major equipment of thermal power plants. Numerical simulation systems are developed with MATALAB. The 300MW generation unit is adopted as the case for simulation analysis to illustrate how the frequency deviation impact generator output. Numerical simulations demonstrate the effectiveness of the proposed model.