离心压缩机模型参数辨识与防喘控制研究

发布时间：2018-01-12 02:19

本文关键词：离心压缩机模型参数辨识与防喘控制研究　出处：《东北大学》2011年硕士论文　论文类型：学位论文

【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。
[Abstract]:In order to meet the needs of the development of circular economy, rational use of surplus gas, iron and steel smelting in the process of saving energy, while reducing gas emission caused by environmental pollution, Baosteel put into operation both economic and social benefits of the gas steam combined cycle power generation project. From the heart to the gas turbine compressor provides high pressure gas, is an important equipment of the whole process of power generation the process is not stable. The surge of centrifugal compressor working in small flow, there is serious damage to the compressor itself, and normal operation of the whole unit caused great impact.
In this paper, Baosteel combined cycle power generation unit of centrifugal compressor anti surge as the object, operation process of centrifugal compressor. Through the analysis of working mechanism of centrifugal compressor, the energy conservation work in the process of gas and gas compressor using mass balance relationship, build mechanism model vertical centrifugal compressor. Based on a large amount of measured data, using five the nonlinear parameter model of genetic algorithm in the identification mechanism, accurate model of centrifugal compressor. Based on this model the surge point in the actual operation process of the compressor, and according to the actual demand of the anti surge design appropriate control scheme.
The simulation results show that the actual operation situation of genetic algorithm parameter identification model can reflect more accurately based on the centrifugal compressor, and can determine the actual operation of the compressor surge point. The anti surge control scheme is designed based on the centrifugal compressor can effectively prevent the occurrence of surge.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH452

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