供水廠電氣及儀表控制系統設計_畢業設計說明書-全文預覽

　　

【正文】 PID 控制器的參數整定 ............................................................................... 17 PID 參數整定的相關原則 ........................................................................... 17 內蒙古科技大學畢業設計 說明書（畢業 論文 ） IV PID 控制算法及特點 ................................................................................... 18 補水部分的設計 ...................................................................................................... 21 硬件電路圖 .................................................................................................. 21 補水部分的工作原理 .................................................................................. 23 供水部分的設計 ...................................................................................................... 25 硬件電路圖 .................................................................................................. 25 供水部分的工作原理 .................................................................................. 27 第四章 系統主要設備的選型及介紹 .................................................................................... 29 變頻器 ...................................................................................................................... 29 變頻器型號的選擇及外形、尺寸 .............................................................. 29 變頻器的接線方式 ...................................................................................... 30 變頻器內部參數的設置 .............................................................................. 30 變頻器的工作原理 ...................................................................................... 33 儀表的選擇 .............................................................................................................. 34 液位傳感器的選擇 ...................................................................................... 34 壓力變送器的選擇 ...................................................................................... 36 電壓表的選擇 .............................................................................................. 37 其他電器的選擇 ...................................................................................................... 37 變壓器的選擇 .............................................................................................. 37 自耦變壓器的選擇 ...................................................................................... 38 隔離開關的選擇 .......................................................................................... 38 空氣開關的選擇 .......................................................................................... 39 萬能轉換開關的選擇 .................................................................................. 39 熱繼電器的選擇 .......................................................................................... 40 接觸器的選擇 .............................................................................................. 40 時間繼電器的選擇 ...................................................................................... 41 中間繼電器的選擇 ...................................................................................... 41 電位器的選擇 ............................................................................................ 42 啟動按鈕和停止按鈕的選擇 .................................................................... 42 指示燈的選擇 ............................................................................................ 43 內蒙古科技大學畢業設計 說明書（畢業 論文 ） V 電流互感器的選擇 .................................................................................... 43 電線及電纜的選擇 .................................................................................................. 43 第五章 結束語 ........................................................................................................................ 45 參考文獻 .................................................................................................................................. 46 附 錄 ...................................................................................................................................... 48 附錄 1：電器的選型表 ................................................................................................... 48 附錄 2：儀表的接線端子 ............................................................................................... 50 附錄 3：補水部分硬件電路圖 ....................................................................................... 51 附錄 4 供水部分硬件電路圖 ....................................................................................... 52 感 謝 ...................................................................................................................................... 53 內蒙古科技大學畢業設計說明書（畢業論文） 1 第一章 緒 論 變頻技術 研究背景 及意義 變頻技術的研究背景 隨著電力電子技術的 快 速發展，變頻器的功能也越來越強 大 。 關鍵詞： 恒壓供水 ； 變頻器 ； PID 控制 ； 變頻調速；儀表內蒙古科技大學畢業設計 說明書（畢業 論文 ） II Rural Water Supply Plant Electrical and Instrumentation Control System Design Abstract According to the requirement of the rural water supply, Design a set of electrical and instrument control of frequency conversion constant pressure water supply system. Frequency conversion constant pressure water supply control system by frequency converter, pressure sensor, pumping unit, Digital display instrument, etc. Water supply plant for dozens of villages in fangyuan 15 km outside the water supply, Water supply plant is posed of pressure and water well group, Source well group consists of three Wells. Put water Wells water injection pressure in the reservoir, Then the pump water from the reservoir through the frequency control of motor speed control for users. Reservoir contains three submersible pump motor control water level, According to the water level is different, Start the different sets of submersible pump, Power of freshman should adopt stepdown startup. At the same time contains three pressurized water pump motor, They are posed of variab