基於PLC控制的鍋爐實時監控系統
摘要：隨着現代工業技術的快速發展，鍋爐的應用更加廣泛。對於鍋爐控制技術的研究有着廣泛的經濟價值。針對這一問題本畢業設計重點研究了基於PLC控制的鍋爐實時監控系統。該系統就是一個簡單的集散控制系統。藉助現代計算機技術，實現對鍋爐的集中控制，分散管理。
本設計主要涉及利用WinCC組態軟件進行鍋爐實時監控系統的設計步驟和開發過程，具體包括系統控制中心的設計，變量的定義，圖形介面的製作，動態對象設計，全局腳本，以及報警系統和用戶管理和項目安全設計。最後就如何使用PLC控制器以及如何運用step7程序設計軟件進行控制程序的編輯作了簡要的介紹。
本設計透過對鍋爐系統的結構和工藝流程的`系統分析，確定了合理的系統控制方案，包括三衝量水位控制系統和雙交叉燃燒控制系統等方案的設計。選用西門子公司的S7-300PLC作爲現場控制器，利用step7進行鍋爐運作程序編寫。同時採用與之配套的WinCC組態軟件進行組態工作，建立一個人機交換介面，並實現PLC和組態軟件之間通訊。透過使用遠程計算機，實現對現場鍋爐執行情況的實時監控和保護，並且記錄相應的數據。
關鍵詞：鍋爐系統；集散控制；WinCC；S7-300 PLCThe system to monitor and control boiler instant by means of PLC
ABSTRACT: With fast development of the modern industry technology, the usage of the boiler is more and more extensive. There is much Economy profit to study the control technology of boiler system. Aimed at this problem, the paper emphasize on the system to monitor and control instant boiler by means of PLC. That system is also a miniature Distributed Control System (DCS). Realizations to whole boiler system gather management and spread control by means of modern computer control technology.
In the design of system, it was textual to introduce a general design step and the development processes. Designing the system control center, defining the variable, creating the sketch interface, designing the dynamic state object, designing The overall situation script program, creating the alarm and protection system, designing customer management and the item safety, this text all has the detailed expatiation. At last introduced that how to use the PLC controller and how to made use of step 7 program software editing control programming in brief.
The paper passing is analytical to the structure and the work craft of the boiler system, make sure reasonable projects of the control system, include design the three variable water level control system and the double cross burn control system etc. Used to Siemens Corporation’s S7-300 PLC as the spots controller, making use of Siemens Corporation’s step7 software to write program of boiler operation procedure. This dissertation aim is passing to make use of this excellent development tool of a runtime software WinCC, carrying on the hardware choice and systems install reasonably, combining to the work craft of boiler, machine and monitoring to request to carry on the applied software development work, to compare with good man-machine interface, formation, develop a boiler system to monitor and control instant. realization to automation monitoring and management. Carry out instant monitoring and controlling to the spot boiler and record correspond of data passing network.
Keyword: Boiler System；Distributed Control System；WinCC；S7-300 PLC
