电气自动化专业毕业论文--自来水公司供水系统的远程控制.docVIP

摘 要 本文主要介绍了某市自来水公司的抽供水系统，在无线数字传输电台日精ND250A的基础上，通过对现场仪器仪表数据信息的采集和监控，运用PLC控制系统及上位机监控实现对该公司分散在几公里范围内的五个水源地的储水量情况进行监测与控制，并通过厂区主分站的上位机的实时显示情况对厂区蓄水池的蓄水量状况进行水源地抽水量的调配控制。由于该公司的各个水源地之间以及与厂区主分站之间相距的距离较远，因此系统需要对相对分散的各个水源地进行集中的监测控制与管理，并能实现远程的控制。在此过程中，系统需要根据水源地现场所采集到的自来水的流量、地下水的水量、管道压力等情况，同时还要考虑用电时刻中的波峰与波谷时段情况，通过变频器控制实现水泵电机的运转，从而达到经济节能的效果。系统一旦设计成功将实现水源井采集地的无人值守，操作人员在厂区的主控室即可对各取水源地的水量供给情况进行集中调配控制，从而降低吨水成本，大大节省了人力与物力。同时，该系统具有的强大的报警和故障诊断功能, 可以方便工程师对系统的故障进行分析和维修；而且系统在软硬件产品的设计和选型中, 采用了应用较为广泛的产品, 并考虑一定的余地,为将来系统的扩建打下了基础。 关键词：数传电台；PLC；变频控制；上位机 Abstract This paper mainly introduces the water pumping and supplying system of a water company in a city. In the basis of wireless digital transmission stations ND250A, based on field instruments data acquisition and monitoring, using PLC control system and PC monitor realization of this company, we can monitor and control the water supply of this company’s five water head areas within the scope of several kilometers. And according to the real-time display of the host computer, we can control the impoundment of impounding reservoir and the quantity of the water pumping from the resource. Because it is a long distance between the company’s water resource and they are also far away from the factory master-substation. Therefore the system needs to make all relative scattered source on the centralized management and control and monitoring, and to realize the remote control. In this process, according to the flow rate of water, the discharge of groundwater and the water pipe pressure, etc，also considering the peaks and troughs electricity time period, the system needs to control the operation of pump motor through the inverter. So we can achieve economic energy saving effect. Once the system is designed successful, it will be the fact that the water Wells collecting zone is unattended, and the operator can centralized allocate and control the water supply from each of the water source in the factory’s control centre room, so as to reduce the cost of