【摘要】：隨著經(jīng)濟(jì)的發(fā)展,人們更加注重于對生活質(zhì)量的追求,對空調(diào)的性能也提出了更高的要求。空調(diào)是商場、辦公大樓、地鐵車站等建筑物中不可缺少的設(shè)備,空調(diào)的普遍使用尤其是中央空調(diào)的使用使得能耗進(jìn)一步加大,在能源短缺的今天,中央空調(diào)水系統(tǒng)的節(jié)能優(yōu)化變得尤為重要。本文針對中央空調(diào)水系統(tǒng)節(jié)能控制而設(shè)計(jì)一套基于S7-300系列PLC(可編程邏輯控制器)的控制系統(tǒng)。介紹了中央空調(diào)的工作原理、變流量控制方法和中央空調(diào)水系統(tǒng)控制策略的國內(nèi)外研究現(xiàn)狀;設(shè)計(jì)了以西門子S7-300PLC作為核心的集散控制系統(tǒng),完成了控制系統(tǒng)驅(qū)動(dòng)電路和控制電路的設(shè)計(jì);利用STEP7編程環(huán)境完成了控制系統(tǒng)的軟件設(shè)計(jì),包括主程序、變頻器通訊子程序、模糊PID子程序以及水泵變頻運(yùn)行與旁路運(yùn)行控制子程序的設(shè)計(jì);利用MCGSE組態(tài)軟件完成了上位機(jī)監(jiān)控畫面設(shè)計(jì);構(gòu)建了PROFIBUS-DP和Ethernet兩層通訊網(wǎng)絡(luò),以Ethernet網(wǎng)絡(luò)實(shí)現(xiàn)PLC、觸摸屏以及計(jì)算機(jī)三者之間的通訊,以PROFIBUS-DP網(wǎng)絡(luò)實(shí)現(xiàn)PLC和變頻器之間的數(shù)據(jù)通信;針對中央空調(diào)水系統(tǒng)大滯后、非線性的特點(diǎn),設(shè)計(jì)了基于模糊控制理論的模糊PID控制器,并在MATLAB中進(jìn)行仿真分析,驗(yàn)證了算法的優(yōu)越性和可行性。通過仿真分析表明,模糊PID控制器能夠讓系統(tǒng)獲得不錯(cuò)的瞬態(tài)性能、動(dòng)態(tài)性能并且具有良好的抗擾動(dòng)性和魯棒性;本文所設(shè)計(jì)的兩層通訊控制網(wǎng)絡(luò),提高了系統(tǒng)的可集成性和開放性,對系統(tǒng)的操作和監(jiān)控變得更加簡單方便,同時(shí)減小了現(xiàn)場調(diào)試的工作量。系統(tǒng)長期穩(wěn)定運(yùn)行結(jié)果表明,通過調(diào)節(jié)水系統(tǒng)的流量,極大的降低了能耗。
[Abstract]:With the development of economy, people pay more attention to the pursuit of quality of life. Air conditioning is an indispensable equipment in shopping malls, office buildings, subway stations and other buildings. The widespread use of air conditioners, especially the use of central air conditioners, further increases energy consumption. Today, there is a shortage of energy. The energy-saving optimization of central air-conditioning water system becomes particularly important. In this paper, a control system based on S7-300 series PLC (Programmable Logic Controller) is designed for energy saving control of central air conditioning water system. This paper introduces the working principle of central air conditioning, the method of variable flow control and the research status of water system control strategy of central air conditioning at home and abroad. The distributed control system with Siemens S7-300PLC as the core is designed. The drive circuit and control circuit of the control system are designed. The software design of the control system is completed by using the STEP7 programming environment, including the main program, the communication subroutine of the frequency converter, the fuzzy PID subroutine and the control subprogram of the frequency conversion and bypass operation of the pump. MCGSE configuration software is used to complete the monitor screen design of the upper computer. The communication network of PROFIBUS-DP and Ethernet is constructed, the communication between PLC, touch screen and computer is realized by Ethernet network, and the data communication between PLC and inverter is realized by PROFIBUS-DP network. A fuzzy PID controller based on fuzzy control theory is designed in view of the large lag and nonlinear characteristics of central air conditioning water system. The simulation analysis is carried out in MATLAB to verify the superiority and feasibility of the algorithm. The simulation results show that the fuzzy PID controller can make the system obtain good transient performance, dynamic performance and good anti-disturbance and robustness. The two-layer communication control network designed in this paper improves the integration and openness of the system, makes the operation and monitoring of the system more simple and convenient, and reduces the workload of field debugging. The results of long-term stable operation show that the energy consumption is greatly reduced by adjusting the flow rate of the water system.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP273;TB657.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鐘宇彤;;試析暖通空調(diào)系統(tǒng)中環(huán)保節(jié)能技術(shù)的應(yīng)用發(fā)展[J];科技資訊;2016年26期

2 韓松濤;;工業(yè)自動(dòng)化中以太網(wǎng)的應(yīng)用與發(fā)展[J];中國高新技術(shù)企業(yè);2016年26期

3 陳尚文;;現(xiàn)場總線標(biāo)準(zhǔn)的發(fā)展與工業(yè)以太網(wǎng)技術(shù)[J];通信電源技術(shù);2016年04期

4 龍騰發(fā);;論空調(diào)制冷技術(shù)的發(fā)展現(xiàn)狀與前景趨勢[J];企業(yè)導(dǎo)報(bào);2016年13期

5 路陽;林桁;;現(xiàn)場總線技術(shù)的應(yīng)用分析[J];科技創(chuàng)新與應(yīng)用;2016年08期

6 張震宇;吳蕓;胡志濤;;基于高壓變頻器的新型工/變頻無擾切換技術(shù)[J];變頻器世界;2016年01期

7 任振寰;;Profibus-PA總線在工程應(yīng)用中的探究[J];石油化工自動(dòng)化;2015年06期

8 劉桐明;孫建剛;陳靖;張會(huì)泉;;Profibus現(xiàn)場總線技術(shù)的應(yīng)用[J];中國儀器儀表;2015年09期

9 薛專;;傳統(tǒng)中央空調(diào)系統(tǒng)運(yùn)行控制策略綜述[J];節(jié)能;2015年01期

10 周磊;李揚(yáng);高賜威;;聚合空調(diào)負(fù)荷的溫度調(diào)節(jié)方法改進(jìn)及控制策略[J];中國電機(jī)工程學(xué)報(bào);2014年31期

，

本文編號(hào)：2428862