基于PLC实现的锅炉水位监控系统设计(完成).doc

宜宾职业技术学院 毕业设计 基于plc发电厂锅炉水位控制系统设计 系 部 自动控制工程系 专 业 名 称 发电厂及电力系统 班 级 电气1091班 姓 名 刘远龙 学 号 200911885 指 导 教 师 张强 2011年8月10日 摘 要 在锅炉水位监控系统中，水位是一个很重要的控制参数，它间接地反映了锅炉负荷和给水的平衡关系。本次设计是合理控制水位，其控制方案是于GE90-30 PLC实现三冲量调节系统，即前馈-串级复合控制系统。 本文介绍的是基于PLC实现的锅炉水位监控系统设计，设计中主要解决的是确定锅炉水位的控制方案、系统控制设备选型、PLC梯形图的编程、系统配置、IO配置、上位机工艺操作界面组态的设计。本锅炉水自控设计选用的美国GE Fanuc自动化公司的90TM-30系列PLC可编程序控制器作为过程输入输出通道，实现现场数据检测及输出控制；操作站采用美国GE Fanuc自动化公司的自动化监控软件CIMPLICITY HMI 4.01版本（300点），进行操作站的组态设计，现场数据检测及输出控制，实现了对锅炉水位的控制。 用GE90-30 PLC来实现锅炉水位监控，可以提高锅炉的自动化控制水平，维持水位在给定范围内，保证了锅炉安全运行，降低工作人员的劳动强度，取得了较好的经济和社会效益。 关键词： PLC 水位 三冲量调节系统 监控软件 Design of Monitoring and Controlling Systems of the Water Level of the Steam Manifolds of Boilers Based on Series PLC Abstract In monitoring and controlling systems of the water level of the steam manifolds of boilers, water lever is a very important control parameter. It reflects the balance of boilers load and supplying water indirectly. This design is reasonable to control the level of the steam manifolds. The tri-impulse controlling systems which is the feed-forward complex cascade command system of the water level of the steam manifolds of boilers is realized using series GE90-30 PLC. The article describes the design of monitoring and controlling systems of the water level of the steam manifolds of boilers based on PLC. The problems solved in the article are the control scheme of the water level of the steam manifolds, equipment selection, the program for ladder diagram of PLC, IO configuration and the design for the technological operation of PLC, in the design, we choose 90TM-30 series PLC made by automation company GE Fanuc in America with programmable controllers as input and output passages, which realizes data testing and output control in the scene. We choose automatic monitored software CIMPLICITY HMI 4.01 (300 points) produced by GE Fanuc automation company i