Method and system for optimizing operation mode of combined cycle unit

The invention provides a combined cycle unit operation mode optimization method and system, and the method comprises the steps: S1, carrying out the gas-steam combined cycle thermodynamic economic analysis of a gas turbine, a waste heat boiler, a steam turbine and a combined cycle unit, and obtaining all economic indexes; s2, establishing a gas-steam combined cycle unit power transformation characteristic prediction model based on a radial basis function neural network according to the obtained economic indexes, and training the established gas-steam combined cycle unit power transformation characteristic prediction model; and S3, obtaining an optimal operation scheme of the combined cycle unit by using an artificial fish swarm algorithm based on the trained variable-power characteristic prediction model of the gas-steam combined cycle unit. 本发明提供了一种联合循环机组运行方式优化方法及系统，包括：步骤S1：分别对燃气轮机、余热锅炉、蒸汽轮机以及联合循环机组做燃气-蒸汽联合循环热力学经济性分析，获得各经济指标；步骤S2：根据获取的各经济指标基于径向基神经网络建立燃气-蒸汽联合循环机组变工特性预测模型，并对构建的燃气-蒸汽联合循环机组变工特性预测模型进行训练；步骤S3：基于训练