| In order to meet the needs of recycled economy development, making full use of surplus coal gas in the process of iron and steel smelting, reducing the consumption of energy, while reducing the pollution due to the coal gas discharging, Baosteel built gas-steam combined cycle power project, which has both economic and social benefits. Centrifugal compressor supplies pressured gas to the gas turbine, which is one of the most important equipment of the whole generation process. Surge is the instable situation of centrifugal compressor when the flow is small, which not only does harm to the compressor itself, but also has influence on the operation of the whole machine set.The paper considers the centrifugal compressor of Baosteel combined cycle power plant as a research object, and does research on the anti-surge problem of centrifugal compressor in the operational process. By analyzing the working mechanism of centrifugal compressor, and using the energy conservation in the process of compressor doing work for gas and the gas mass conservation relationship, the paper establish the mechanism model of centrifugal compressor. Combining with the large quantities of measured datum, and identifying the five nonlinear parameters of mechanism model by genetic algorithm, the paper obtain the accurate model of centrifugal compressor. We can get the surge point of compressor in the process of actual operation with this model, and design appropriate surge control scheme according to the actual demands. Finally, this paper analyze the simulation through the model of centrifugal compressor and the surge control scheme.The simulation results show that, the model parameters identified by genetic algorithm accurately reflects the actual operation situation of centrifugal compressor, and the surge point of the compressor in the actual operation also can be determined. The surge control scheme in this paper effectively prevents the centrifugal compressor from surging. |
PDF Full Text Request