本文關(guān)鍵詞： 自控系統(tǒng) PLC 模糊控制 鍋爐 PID　出處：《河北科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：我國工業(yè)鍋爐量大面廣,多為人工控制,穩(wěn)定性與精度不高,已經(jīng)不能適應(yīng)生產(chǎn)過程智能化的生產(chǎn)要求。本文結(jié)合某工廠大型熱油鍋爐系統(tǒng),介紹了目前鍋爐的基本運(yùn)行情況和各種控制方法,構(gòu)建了PLC與上位機(jī)相結(jié)合并以模糊自適應(yīng)PID為控制策略的鍋爐自控系統(tǒng),對(duì)大型鍋爐的改造流程、工作原理及程序設(shè)計(jì)進(jìn)行了詳細(xì)的說明。使鍋爐處于最佳的燃燒狀態(tài)并保證鍋爐的安全經(jīng)濟(jì)運(yùn)行。本文的主要工作為以下幾個(gè)方面:分析自動(dòng)控制系統(tǒng)和燃煤鍋爐的現(xiàn)狀和發(fā)展以及燃煤鍋爐自控系統(tǒng)改造前的特點(diǎn),對(duì)現(xiàn)有的鍋爐自動(dòng)控制方案進(jìn)行分析比較,最終選用PLC與上位機(jī)組成控制系統(tǒng)對(duì)燃煤鍋爐進(jìn)行改造。根據(jù)合作企業(yè)提出的要求,提出系統(tǒng)改造的總體設(shè)計(jì)方案和具體的控制策略。用模糊自適應(yīng)PID控制算法構(gòu)建基于PLC的鍋爐模糊自適應(yīng)PID控制器,并重點(diǎn)對(duì)控制器的設(shè)計(jì)進(jìn)行了詳細(xì)的說明,最終實(shí)現(xiàn)了基于PLC的鍋爐模糊自適應(yīng)PID控制。構(gòu)建PLC與上位機(jī)組成的自控系統(tǒng),選擇處理器及模塊,分配I/O點(diǎn),解決PLC與上位機(jī)之間的實(shí)時(shí)通訊問題。編寫PLC程序,分別對(duì)爐排電機(jī)、鼓風(fēng)機(jī)變頻器和引風(fēng)機(jī)變頻器進(jìn)行控制,以及編寫故障連鎖反映程序,保證系統(tǒng)快速響應(yīng),平穩(wěn)運(yùn)行并及時(shí)發(fā)現(xiàn)問題解決問題。利用組態(tài)軟件開發(fā)人際交互界面,實(shí)現(xiàn)對(duì)鍋爐的實(shí)時(shí)監(jiān)控。本文最終實(shí)現(xiàn)了對(duì)鍋爐的自動(dòng)化控制,改造后的系統(tǒng)投入使用后運(yùn)行十分穩(wěn)定,為工人營造了良好的工作環(huán)境,為企業(yè)創(chuàng)造了經(jīng)濟(jì)效益。
[Abstract]:The industrial boiler in our country is widely used, mostly controlled by man, and its stability and precision are not high, so it can not meet the requirement of intelligent production process. This paper combines the large scale hot oil boiler system of a factory. This paper introduces the basic operation situation and various control methods of the boiler at present, and constructs a boiler automatic control system which combines PLC with the upper computer and takes fuzzy adaptive PID as the control strategy to reconstruct the large-scale boiler. The working principle and program design are explained in detail. The boiler is in the best state of combustion and the safe and economical operation of the boiler is guaranteed. The main work of this paper is as follows:. The present situation and development of the automatic control system and coal-fired boiler and the characteristics of the coal-fired boiler automatic control system before revamping are analyzed. The existing boiler automatic control scheme is analyzed and compared. Finally, PLC and upper computer control system are selected to transform the coal-fired boiler. According to the requirements of the cooperative enterprise. The overall design scheme and specific control strategy of the system reconstruction are put forward, and the fuzzy adaptive PID controller of boiler based on PLC is constructed by using fuzzy adaptive PID control algorithm. Finally, the fuzzy adaptive PID control of boiler based on PLC is realized. The automatic control system composed of PLC and host computer is constructed, and the processor and module are selected. I / O points are allocated to solve the problem of real-time communication between PLC and host computer. The PLC program is compiled to control the grate motor, blower inverter and induced fan inverter respectively. And write fault chain response program to ensure the system rapid response, smooth operation and timely discovery of problem-solving. The use of configuration software to develop interpersonal interface. Realize the real-time monitoring of the boiler. This paper finally realizes the automatic control of the boiler. After the system is put into use, the operation is very stable, creating a good working environment for the workers. For the enterprise to create economic benefits.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TK223.7

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