The invention provides a
combustion optimization method based on a
combined cycle unit, and belongs to the technical field of
combustion engineering.The method comprises the steps that operation parameters of a gas
turbine are monitored through a sensor, the operation parameters of the gas
turbine are evaluated in combination with a first
combustion rule, and important features are extracted from a combustion
evaluation result based on a combustion optimization target; acquiring real-time heat value and density data of a combustion source, integrating the real-time heat value and density data with operation parameters of the gas
turbine to obtain a first
data set, performing feature construction to obtain a derivative
feature set, and establishing a combustion model in combination with a second combustion rule; combining the combustion model and historical operation data of the
combined cycle unit to construct a prediction model of the optimal opening degree of the premixing valve, and obtaining the optimal opening degree of the premixing valve; the premixing valve is adjusted according to the optimal opening degree, the real-time combustion condition after adjustment of the premixing valve is collected and compared with the predicted combustion condition, a feedback mechanism is formed based on the comparison result, the combustion model is updated, the energy efficiency
utilization rate of the
combined cycle unit is remarkably increased, and emission of
NOx and other harmful substances is effectively reduced.