净水厂集散控制系统/The distributed control system of the water supply works
The modern Water Supply Works is a fairly complete system,which was composed with many more settling course, whoseprocessing scale is very large. Because there are a lot ofinstruments, the absolutely reliable moving is demanded. Therequirement of the processing's observation and operation is veryhigh by the operating staff. There should be proper data communication between the wholeplant, each workshop and the control operation of the processingsystem, which is asked for by concentrated and synthetic control.Above all, there should be lots of data transmission and high speedof which, but normal control way couldn't satisfied the requirement.So we only choose the Distributed Control System which canabsolutely and exactly control the technological process of each stepof the water works. Distributed Control System (D CS) is a new control system which based on the control computer, communication, terminaldisplay and conversation of the person- computer interface. Bywhich the system is divided into lots of control and management formof step by step, such as: processing control, control management,production management etc. Among each step there is a data bus tocommunicate, Now all of the control loop and hundreds of theparameters test, data processing, display andcontrol etc needn't tobe concentrated into a single computer. In brief, the computer is dispersed into production andcontrolling, completing the data collecting and processing, as well ascontinued and ordered control, which eliminate the defect of theconcentrated danger created by the focus control of the computer. Atthe same time, it can improve the limitation of the single function ofthe normal instruments' processing control. With the high speed communication network, CRT terminal,man--computer interface as well as every outside equipment such as:printer, draught machine and copier machine etc can concentrate tobe operated to display, record and management, which can overcomethe scatting of the processing control and the unconvenient of theman communicating with the computer. This task" The DCS of the Water Supply works" is to researchwith the Distributed Control system of the purifying water works bythe theory contacting with the practice. On the other hand, this textwill research the PI regulating using into the chlorinating systemautomatic control, at the point of vies of theory and application. The task will go on to set up the model, research the parameterof the mathematics model and computer emulation, combining with nThe DCS of SHASHI East District Water works n. The PLC--5 series production of American A--B Company willbe used to design the software and hardware. "RSVIEW" is usedinto working station and in chlorinating system will use the V--500chlorinate machine and suitable testing instruments of AmericanW&T Company. It will be completed to fully utilize the theorycontacting-withthe practice. The text will discuss that the same object is controlled with thesimulating PID control in the computer. Through defining severalparameters, changing one or two parameter, then get the mostexcellent parameter, using the lad diagram to program, conduct thetest on site and verify the effect. Due to the limitation of my abilities and the time, this paper willunavoidable have mistakes and mismatches. I'm waiting for youradvice in respect.