一种降低燃气轮机气耗的温度控制优化方法研究

Research on the Temperature Control Optimization Method to Reduce Gas Consumption of Gas Turbine

燃气轮机的排气温度影响联合循环机组的整体效率,而排气温度的有效控制依赖于燃气轮机的温度控制策略。介绍了GE公司燃气轮机的温度控制设计原理及控制方法,依据不同类型的温度控制曲线的计算过程对其可优化的方法进行了分析研究。依托排气温度、经济性的需求,结合固有设备的性能,对温度控制策略中IGV温控线(TTRXGV)、压比温控线(TTRXP)、功率温控线(TTRXS)进行优化。结合优化后的机组证明燃气轮机发电气耗在折算成纯凝工况后较优化前降低了0.000 5 m^3/(kW·h),在满足燃气轮机安全稳定运行的前提下提升了其经济性,表明所述优化方法的有效性和可靠性。

The exhaust gas temperature of the gas turbine affects the efficiency of gas-steam combined cycle plant. The effectivecontrol of the exhaust gas temperature depends on the temperature control strategy of the gas turbine. This paper introduces thedesign principle and control method of temperature control for GE gas turbine. Regarding the calculation process of different types oftemperature control curves, corresponding optimization methods are analyzed and explored. Based on the exhaust temperature andeconomic requirements, and then combined with the performance of existing equipment, the IGV temperature control line（TTRXGV）, pressure ratio temperature control line （TTRXP）, and power temperature control line （TTRXS） are optimized fortemperature control strategies. After the optimization, the gas consumption of gas turbine is reduced by 0.000 5 m3/kWh after beingconverted into pure condensing condition. The economy is improved under the condition that the requirements are satisfied for secureand stable operation of the gas turbine, which demonstrate the effectiveness and reliability of the optimization method.This work is supported by Science and Technology Project of China Datang Gorporation （No.KY-2018-01）.