毕业设计：水泵在高层建筑恒压供水系统中的PLC和变频控制以及监控组态设计.doc

中文摘要 本文介绍水泵在高层建筑恒压供水系统中的PLC和变频控制以及监控组态设计过程。系统使用压力变送器对供水水压进行连续检测，检测到的压力信号转换成电信号后送给可编程控制器（PLC）和变频器。PLC作为控制机构，变频器和水泵构成执行机构，压力变送器作为反馈机构，共同组成一个闭环控制系统。系统采用一台变频器拖动台电机的起动运行调速采用循环使用的方式运行。机PLC连接，数据采集状态监控压力器能够实时检测到压值并反馈到PLC，利用PD控制策略实时调整水泵流量，从而实现恒压单台水泵工况的调节是通过变频器来改变电源的频率f来改变电机的转速n,从而改变水泵的来实现的。分析水泵的能耗比较图，可以看出利用变频器实现调速恒压供水，当转速降低时，流量与转速成正比，功率以转速的三次方下降，与传统供水方式阀门节流控制相比，可以能耗，节能明显。In this paper, constant pressure pumps in the high-rise building water supply systems in the PLC and frequency control, and monitor the configuration design process. System uses hydraulic pressure transmitter for continuous water supply testing, to detect the pressure signal after the conversion to electrical signals to the programmable logic controller (PLC) and the inverter. PLC as a core control mechanism, on the one hand to control the peak transducer and pump up the work, on the other hand, connected with the host computer, running on the system to achieve the configuration monitoring; inverter through its regulation of the internal operations of the PID function, transducer and pumps constitute the implementation of institutions, pressure transmitter testing and feedback as a body, the formation of a joint closed-loop control system. The system uses a frequency converter three drag pump motor starter switch, operation and speed. The use of recycled water pump unit run. PC system with monitor, PC and PLC connection, completion of the system of data collection and condition monitoring. System, the pressure transmitter can be detected in real-time pressure water supply networks and value back to the PLC and inverter, inverter P1D control strategies using real-time adjustment of pump speed (frequency), change its flow, in order to achieve constant pressure water supply. A single pump operating conditions through the regulation of the power inverter to change the frequency f to change the motor speed n, in order to change the pump flow Q to achieve. Analysis of pump power consumption comparison, one can se