基于DSP的脱硫除尘离心泵流量控制系统研究

发布时间：2018-12-13 08:53

【摘要】：随着产业结构的不断升级,工业发展正在从传统的粗放式发展向精细化、节约化迈进。由于工业发展相对落后,导致目前我国的能源结构仍然是以火电为主,其它形式为辅。火力发电即指燃烧煤炭推动蒸汽轮机产生电能。煤炭燃烧产生的二氧化硫、固体颗粒物等污染物一直是污染环境的重要因素。面对环境保护的迫切需求,必须减少二氧化硫等污染物的排放,现在煤炭行业主要是采用低硫煤和脱硫除尘两种方法来减少二氧化硫等污染物的排放。采用脱硫除尘技术是主流趋势,符合长远发展的需要。本文研究出一套基于DSP的脱硫除尘离心泵流量控制系统,实现了脱硫除尘过程中离心泵的智能控制和检测。DSP具有运算速度快,处理数据能力强的特点,应用DSP控制器是目前控制领域的趋势。因此研究一款基于DSP的脱硫除尘离心泵流量控制系统,对脱硫除尘控制系统具有重要意义。本文研究的主要内容是：(1)研究脱硫除尘离心泵控制系统的控制方案。传统的管路调节流量方法,在调节阀门开度的过程中会造成比较大的管路损失。现在主流的离心泵调速系统主要是采用变频调速原理。变频调速主要包括恒压比控制、转差率控制和矢量控制。由于恒压比控制简单便捷,应用广泛,因此本文采用恒压比控制方式。(2)根据现代控制理论,对各主要组成元件分析建立数学模型,并建立控制系统的状态空间表达式。(3)采用BODE图和Lyapunov稳定性分析方法,分析控制系统的稳定性,能观能控性。(4)由脱硫除尘离心泵流量控制系统的传递函数和状态空间表达式,通过PID控制、极点配置、鲁棒H∞控制等控制方法对控制系统进行研究。(5)搭建基于DSP的脱硫除尘离心泵流量控制系统试验台,论述主要实验元件、实验电路连接、软件和编程依据等。通过分析实验数据得出相对于传统控制方式,基于DSP的脱硫除尘离心泵流量控制系统可以有效控制流量,提高流量控制系统性能。本文首次将DSP控制技术应用到脱硫除尘离心泵流量控制系统,可有效提高脱硫除尘离心泵流量控制的数字化水平,节能降耗,对降低行业能耗具有重要意义。采用恒压比控制方式并结合DSP数字信号处理器,研究出基于DSP的脱硫除尘离心泵流量控制系统。对控制系统进行静态特性和动态特性分析。针对基于DSP的脱硫除尘离心泵流量控制系统采用极点配置,鲁棒H∞控制等优化控制算法对控制系统进行优化分析。研究出基于DSP的脱硫除尘离心泵流量控制系统试验台,通过对实验数据的分析研究可以得出该控制系统具有控制误差小、反应迅速、运行平稳和节能效果优良的特点。
[Abstract]:With the continuous upgrading of industrial structure, industrial development is moving from traditional extensive development to refinement and economization. Because the industrial development is relatively backward, the energy structure of our country is still dominated by thermal power and supplemented by other forms. Thermal power generation means burning coal to drive steam turbine to produce electric energy. Sulfur dioxide, solid particles and other pollutants produced by coal combustion have always been important factors to pollute the environment. In the face of the urgent need of environmental protection, it is necessary to reduce the emission of sulfur dioxide and other pollutants. At present, coal industry mainly adopts low sulfur coal and desulphurization and dust removal to reduce the emission of sulfur dioxide and other pollutants. Desulphurization and dust removal technology is the mainstream trend and meets the needs of long-term development. In this paper, a set of flow control system of desulphurization and dust removal centrifugal pump based on DSP is developed, which realizes the intelligent control and detection of centrifugal pump in the process of desulphurization and dust removal. DSP has the characteristics of fast operation speed and strong data processing ability. The application of DSP controller is the trend in the field of control. Therefore, it is of great significance to study a flow control system of desulphurization and dust removal centrifugal pump based on DSP. The main contents of this paper are as follows: (1) the control scheme of desulphurization and dust removal centrifugal pump is studied. The traditional way of regulating the flow through the pipe will cause a great loss in the process of adjusting the opening of the valve. Now the mainstream centrifugal pump speed regulation system is mainly using frequency conversion speed regulation principle. Frequency conversion speed regulation mainly includes constant voltage ratio control, slip rate control and vector control. Because the constant pressure ratio control is simple and convenient, it is widely used in this paper. (2) according to the modern control theory, the mathematical model of the main components is established. The state space expression of the control system is established. (3) the stability of the control system is analyzed by using BODE diagram and Lyapunov stability analysis method. Observable controllability. (4) transfer function and state space expression of flow control system of desulphurization and dedusting centrifugal pump, through PID control, pole assignment, Robust H 鈭，

本文编号：2376274