换热站自动控制系统设计  

Design of the Automatic Control System for Heat Exchange Station

作　　者：李红光[1] 张国钧[1] 

机构地区：[1]太原理工大学信息工程学院,山西太原030024

出　　处：《自动化仪表》2015年第3期36-39,共4页Process Automation Instrumentation

摘　　要：针对换热站采用温度调节的控制方式不能有效节能,流量调节易造成二次网水利工况不稳定的情况,设计了分时段流量调节和温度调节相结合的控制策略。同时对供水温度进行预测,以补偿系统的大滞后性。选用西门子S7系列PLC作为控制器,设计了基于Profibus-DP网络的控制系统,采用MPI电缆通信方式实现了S7-300和上位机监控组态王之间的通信。为便于数据分析,采用了一种通过Excel VBA接口实现历史数据读取的方法。For heat exchange station, the control mode using temperature control is not effective for energy saving, while using flow control may lead to the unstable work condition of water conservancy in secondary network, thus the control strategy which combines flow control and temperature control in different time periods is designed. In addition, the temperature of the water supply is predicted, to compensate the large time hysterics of system. Siemens S7 series PLC is selected to be the controller, the control system based on Profibus-DP network is designed, the MPI cable communication is adopted to implement communication between S7-300 and configuration software KingView of host computer. To ease data analysis, Excel VBA interface is used to read historical data.

关 键 词：换热站 PROFIBUS-DP 变流量变温度控制 组态王 数据采集 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]