本文選題：SCR脫硝　切入點(diǎn)：多變量約束　出處：《東南大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,隨著國(guó)家對(duì)燃煤電廠污染物排放標(biāo)準(zhǔn)的日趨嚴(yán)格,對(duì)燃煤電廠SCR脫硝系統(tǒng)的控制顯得尤為重要。SCR脫硝系統(tǒng)是一個(gè)典型的大延遲、大慣性對(duì)象,有一定的非線性,存在輸入輸出約束,傳統(tǒng)的控制方式在新的排放標(biāo)準(zhǔn)下往往難以取得滿意的控制效果,因此需要研究新型的控制策略。模型預(yù)測(cè)控制能夠根據(jù)歷史信息預(yù)測(cè)系統(tǒng)未來的輸出,對(duì)大慣性對(duì)象具有一定的控制能力,能夠處理控制過程中普遍存在的約束,因此,在SCR脫硝系統(tǒng)的控制中具有廣闊的應(yīng)用前景。本文首先基于SCR脫硝實(shí)際對(duì)象的特殊性(SCR反應(yīng)器一般包含A、B兩側(cè))以及國(guó)家對(duì)燃煤電廠NOx考核的方式(考核點(diǎn)在煙囪入口處)設(shè)計(jì)多變量控制系統(tǒng),針對(duì)SCR脫硝系統(tǒng)普遍存在的約束,給出了相應(yīng)的約束求解方法,并將區(qū)間控制的思想引入到預(yù)測(cè)控制中,證明了控制算法的有效性和優(yōu)越性；其次在保留兩側(cè)噴氨閥門協(xié)調(diào)控制和區(qū)間控制優(yōu)點(diǎn)基礎(chǔ)上,針對(duì)控制過程中出現(xiàn)的模型失配研究基于Laguerre模型的SCR脫硝系統(tǒng)自適應(yīng)預(yù)測(cè)控制方法,通過仿真測(cè)試可以看到該算法能更好的適應(yīng)模型變化；最后基于MATLAB軟件與C++語言平臺(tái)設(shè)計(jì)開發(fā)脫硝系統(tǒng)優(yōu)化控制軟件,投入到現(xiàn)場(chǎng)運(yùn)行,分析其控制效果,并針對(duì)問題提供了相應(yīng)的解決方案。
[Abstract]:In recent years, with the increasingly strict emission standards of pollutants in coal-fired power plants, it is particularly important to control the denitrification system of coal-fired power plants. SCR denitrification system is a typical large delay, large inertia object, and has certain nonlinearity. There are input and output constraints, and traditional control methods are often difficult to achieve satisfactory control effect under the new emission standards, so it is necessary to study new control strategies. Model predictive control can predict the future output of the system according to historical information. It has certain control ability for large inertial object, and can deal with the constraints that are common in the control process, so, It has a broad application prospect in the control of SCR denitrification system. Firstly, based on the particularity of SCR denitrification actual object, the SCR reactor usually contains both sides of SCR B) and the way of national NOx examination for coal-fired power plant (check point is in smoke). Design multivariable control system, Aiming at the common constraints of SCR denitrification system, the corresponding constraint solution method is given, and the idea of interval control is introduced into predictive control, which proves the effectiveness and superiority of the control algorithm. Secondly, the adaptive predictive control method of SCR denitrification system based on Laguerre model is studied on the basis of keeping the advantages of coordinated control and interval control of two-side ammonia injection valve. Through the simulation test, we can see that the algorithm can adapt to the model change better. Finally, the optimal control software of denitrification system is designed and developed based on MATLAB software and C language platform, and put into operation on the spot, and its control effect is analyzed. And provides the corresponding solution to the problem.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：X773

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