石銳 隋修武 虞躍霖 張曉萌
摘 要 針對集中供熱系統中熱網的耦合性、非線性、滯后性等控制難點,結合節能環保的理念,針對換熱站設計了基于模糊理論的智能供熱控制系統。依托組態王和現場 PLC 聯合開發高級控制策略,實現遠程監控中心對小區換熱站的溫度、壓力、流量、閥門開度等參數的現場采集和實時調節, 提升了供熱系統的控制精度與供暖效果。實際運行該設計增強了熱網控制系統的智能化程度,體現出了良好的節能性。
關鍵詞 集中供熱 溫度補償 Fuzzy-PID 遠程監控
中圖分類號:TP277 文獻標識碼:A DOI:10.16400/j.cnki.kjdkx.2017.04.011
Research on Intelligent Monitoring Technology of Central Heating System
SHI Rui[1][2], SUI Xiuwu[1][2], YU Yuelin[1][2], ZHANG Xiaomeng[1][2]
([1] School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387;
[2] Tianjin Key Laboratory of Modern Mechanical and Electrical Equipment Technology, Tianjin 300387)
Abstract According to the central heating system heating network coupling, nonlinear and hysteresis control difficulties, combined with the concept of energy saving, the heat transfer station design of intelligent heating control system based on fuzzy theory. Based on the on-site Kingview and PLC joint development of advanced control strategy, implementation of the remote monitoring center of district heat station temperature, pressure, flow, valve opening and other parameters of the site acquisition and real-time adjustment, improve the control precision and the heating effect of the heating system. The actual operation of the design enhances the intelligent degree of the control system of the heat supply network.
Key words central heating; temperature compensation; Fuzzy-PID; remote monitoring
0 引言
由于我國供暖監控系統發展緩慢,無法跟供熱規模進行良好匹配,結果導致了絕大多數集中供熱系統自動化程度較差,調節具有極其嚴重的滯后性,無法實現按需供暖,能源大量浪費。隨著集中供熱方式的普及,如何合理地調度和控制集中供熱系統,使供熱系統的供熱均勻、耗能少、自動化程度高,已成為供熱行業亟待解決的問題,同時也是國內外專家一直在研究的熱門課題。[1]
1 熱網系統運行原理
目前城市供暖一般采用集中供暖的方式,小區熱力站由一次、二次網供熱回路組成, 兩回路之間通過中間換熱器實現熱量交換,為便于調控一、二次網的熱力水力情況,換熱器采用間接連接模式。一次熱源由熱電廠經管道送到換熱站,通過換熱器的換熱,將一次網熱源的熱量交換到二次網熱水,最后經分水器分至熱用戶。二次網中在換熱器之前需加循環泵以控制恒定壓差?!?br>