基于變頻調(diào)速在泵站控制系統(tǒng)中應(yīng)用的研究

字?jǐn)?shù):10697,頁(yè)數(shù):24  電氣自動(dòng)化論文編號(hào):ZD112  

                            
目錄
1 引 言 1
2 緒論 2
2.1 本論文背景與意義 2
2.2 變頻調(diào)速概述 2
2.3 變頻調(diào)速技術(shù)的發(fā)展及現(xiàn)狀 2
2.4 泵站控制系統(tǒng)地位、作用 3
3 變頻調(diào)速技術(shù) 4
3.1 變頻調(diào)速的基本理論 4
3.2 變頻調(diào)速對(duì)異步電機(jī)機(jī)械特性的影響 4
4 變頻調(diào)速的節(jié)能方法及原理 8
4.1 “恒壓變量”調(diào)節(jié)及其節(jié)能原理 8
4.2 “恒量變壓”調(diào)節(jié)及其節(jié)能原理 10
5 變頻調(diào)速技術(shù)在水泵中的節(jié)能原理 12
5.1 曲線擬合的最小二乘法 12
5.2 水泵的性能曲線 12
5.3 水泵的相似定律 13
5.4 水泵運(yùn)行的工作點(diǎn) 14
5.5 變頻調(diào)速在水泵上的節(jié)能特點(diǎn) 15
6 影響水泵變頻調(diào)速節(jié)能效果的因素探討 16
6.1 水泵單位能耗分析 16
6.2 富余揚(yáng)程對(duì)節(jié)能效果的影響 16
6.2.1 管路特性的影響： 16
6.2.2　調(diào)速方式的影響 17
6.3 效率偏差對(duì)節(jié)能效果的影響 17
7 總結(jié) 19
致  謝 19
參考文獻(xiàn) 20

【摘要】：隨著社會(huì)經(jīng)濟(jì)的飛速發(fā)展，城市建設(shè)規(guī)模的不斷擴(kuò)大，人口的增多以及人們生活水平的不斷提高，對(duì)城市供水的數(shù)量、質(zhì)量、穩(wěn)定性提出了越來(lái)越高的要求。變頻調(diào)速裝置具有節(jié)能、維護(hù)工作量小自動(dòng)控制性能好等優(yōu)點(diǎn)，得到廣泛應(yīng)用。文中對(duì)變頻調(diào)速系統(tǒng)的工作原理做了簡(jiǎn)單的介紹，從理論上分析了變頻調(diào)速系統(tǒng)的機(jī)械特性。通過對(duì)水泵節(jié)能原理的分析指出水泵調(diào)節(jié)運(yùn)行時(shí)能量損耗的大小較大程度取決于控制流量的方式；結(jié)合對(duì)幾種常見調(diào)速方法性能的比較，歸納了水泵采用變頻調(diào)速的優(yōu)點(diǎn)；通過計(jì)算證明在大型泵站和耗電量大且裝置揚(yáng)程變化較大的泵站采用變頻調(diào)速節(jié)能效果顯著。

【關(guān)鍵詞】：泵；節(jié)能；變頻調(diào)速

Abstract: With the progress development of social economic and the construct scale of city continuously enlarge, increasing of population and standard of living of people continuously improved, more and more demanding to quantity, quality and stability of water supply bring forward in city. With these advantages of energy-saving, low maintenance and easy automatic control ,variable-frequency speed regulation technology has been widely used. After the introduction of the principles of variable-frequency drive technology, the thesis analyzed mechanical characteristics. According to the analysis of pump energy saving, during the pump verified velocity, the quantity of energy waste lie on the type of flow control, and combined with several regular methods comparison, the advantage of variation velocity is concluded. Has calculated that in large-scale pumping stations and power installations and major changes in the larger lift pumping station using energy-saving effect of VVVF significantly

Key words: Pump; Energy saving; Variation velocity