【作者】 姜波；

【导师】 王小刚；

【作者基本信息】 东北大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 为了适应循环经济发展的需要,合理利用钢铁冶炼过程中的富余煤气,节约能源,同时减少煤气放散带来的环境污染,宝钢投产建成兼具经济效益和社会效益的燃气—蒸汽联合循环发电工程。离心压缩机为燃气轮机提供高压煤气,是整个发电工艺流程的重要设备。喘振是离心压缩机工作在小流量时的不稳定状态,对压缩机本身有严重的损害性,同时会对整个机组的正常运行造成很大影响。本文以宝钢联合循环发电机组离心压缩机为对象,研究离心压缩机运行过程中的防喘问题。通过分析离心压缩机的工作机理,利用压缩机对煤气做功过程中的能量守恒以及煤气质量守恒关系,建立离心压缩机的机理模型。结合现场大量实测数据,采用遗传算法辨识机理模型中的五个非线性参数,得到离心压缩机的准确模型。在此模型基础上求得压缩机实际运行过程中的喘振点,并根据现场实际需求设计合适的防喘振控制方案。仿真结果表明,基于遗传算法参数辨识的模型能够更准确的反映离心压缩机的实际运行状况,并且能确定压缩机实际运行中的喘振点。在此基础上设计的防喘振控制方案能够有效的防止离心压缩机喘振的发生。更多还原

【Abstract】 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.更多还原