Abstract : This paper studies the dynamic teaching model of a dual-fuel servo system for a gas turbine using theoretical modeling and digital simulation methods. In particular, the dynamic characteristics of the dual-fuel servo system under conditions of unit speed variation, load variation, and switching and co-firing of the two fuels are investigated, and its dynamic equations are derived, thus establishing a practical dynamic mathematical model. The establishment of this model is an indispensable and important step in designing the main control system of a gas turbine. Keywords: Gas turbine; Servo system; Dynamic model; Simulation 0 Introduction Currently, many gas turbines use dual fuels, namely gaseous fuels and liquid fuels. The ability to switch between and co-fire the two types of fuels improves the fuel adaptability of the gas turbine system. Gas turbine main control systems typically employ a multi-channel low-select design, meaning that through one or more multi-channel low-select links, the minimum current value is selected from the control commands (FSRs) for fuel flow, which are operable variables in multiple loops such as speed (or power-speed) regulation, acceleration regulation, and exhaust temperature regulation. Similarly, for system safety considerations, appropriate limiting processing is applied, and this value is then used as the setpoint for the fuel servo system to control fuel flow, thereby controlling power, speed, acceleration, and temperature. Therefore, establishing a dynamic mathematical model of the fuel servo system is a crucial step in designing a gas turbine main control system. It is indispensable for the tuning calculations of the gas turbine main control system. This paper will discuss the dynamic mathematics of a gas turbine fuel servo system using both gas and diesel fuel in detail. 1. Dynamic Mathematical Model of a Dual-Fuel Servo System The dual-fuel servo system of a gas turbine consists of a liquid fuel servo loop, a gas fuel servo loop, and a fuel command distributor that coordinates the seamless switching and co-firing of the two loops. The FSR control commands obtained from the low-selection signals of several channels of the gas turbine main control system are distributed by the servo system fuel command distributor into two control commands, FSR1 and FSR2, for different fuel quantities. These commands are then controlled by the liquid fuel and gas fuel servo systems, respectively. [b][align=center]For more details, please click: Research on the Dynamic Mathematical Model of a Gas Turbine Dual-Fuel Servo System[/align][/b]