Marine gas turbine parameter estimation and performance optimization method based on extended Kalman filtering

Abstract

The invention aims at providing a marine gas turbine parameter estimation and performance optimization method based on extended Kalman filtering. The marine gas turbine parameter estimation and performance optimization method comprises the following steps: establishing a three-axis gas turbine mathematical model; estimating the gas path state of the marine three-axis gas turbine by adopting an extended Kalman filtering method and utilizing the output of observable data of the marine three-axis gas turbine with the gas path fault in the operation process; adopting a Newton-Raphson iteration method to solve the pressure ratio, the flow and the efficiency characteristic of each part of the three-axis gas turbine under the variable working condition, and adopting a Runge-Kutta method to solvethe variable working condition dynamic process of the three-axis gas turbine; and establishing a performance optimization model by adopting a sequential quadratic programming algorithm, and solving anoptimal steady-state working point for keeping the output power of the marine gas turbine stable. According to the method, when the marine three-axis gas turbine has a gas path fault, the gas path health state can be accurately estimated, and parameter optimization is carried out. The method for solving the nonlinear dynamic system is wide in application range and also has reference significancewhen other systems are applied to Kalman filtering.

Description

Technical field [0001] The invention relates to a method for controlling a marine gas turbine, in particular to a method for optimizing the performance of a marine gas turbine. Background technique [0002] Marine gas turbines have been widely used and developed in the field of marine power, and their safe and efficient operation is becoming more and more important. During use, marine gas turbines are corroded by sea water splashing and evaporation from the ocean. Air containing a large amount of sodium chloride entering the engine will salt the surface of the compressor and reduce the performance index of the unit. At the same time, it will also cause corrosion to the unit and shorten the engine. life. In order to ensure the safe and efficient operation of marine gas turbines and reduce life cycle costs, tracking the performance parameters and operating conditions of components is essential for its self-diagnosis and fault analysis. Three-axis gas turbines are common marine ga...

AI Technical Summary

Problems solved by technology

During the use of marine gas turbines, they are corroded by seawater splashing and evaporation from the ocean. When air containing a large amount of sodium chloride enters the engine, salt will accumulate on the surface of the compressor, reducing the performance of the unit. At the same time, it will also corrode the unit and shorten the engine life. life

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