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1、WORD格式可编辑中小水电站水闸监控系统的设计——下位机部分摘要随着信息化技术在水利行业的大力推广，作为水利信息化的重要组成部分的水闸监控系统日益受到重视。如今在水闸监控系统的设计中，人们可以利用计算机网络技术、自动控制技术、通信技术和传感器技术，提高系统的自动化的水平，对水利的发展具有重要意义。本文首先对系统总体方案进行了研究与设计，分析了系统的功能，确定了以集散控制系统作为整个控制系统的结构，并对系统的软、硬件予以了介绍。随后，本系统选定了具有起重量大、负载刚性大、自动化程度高、安全可靠性好等特点的液压启闭机控制闸门升降。同时对液压启闭过程中同步策略
2、进行了研究，给出了基于电磁换向阀控制回路的解决方案。同时，通过研究电机软启动原理，设计了软启动控制电气原理图，并详细介绍了电机软启动的工作流程，实现了对电机的软启动控制、运行监视和保护。最后设计了PLC与闸门开度仪、液位变送器等传感器的连接，制定了闸门控制系统的具体流程，确定了PLC的型号，并绘制出了相应的梯形图程序。关键词：集散控制系统液压启闭软启动可编程控制器梯形图TheDesignofMediumandSmall HydroelectricPowerStation’sSluiceMonitoringSystem——PLCSectionABSTRAC
3、TAlongwiththespreadofinformationtechnologyinwaterresourceindustry,the专业技术知识共享WORD格式可编辑sluicemonitoringsystem,whichistheimportantpartofwaterresourceindustry,isconcernedbymoreandmorepeople. Nowadays,peoplecanusesomehightechnologymeansinthedesignofsluicemonitoringsystem,suchascomput
4、ernetworktechnology,automaticcontroltechnology,communicationstechnologyandsensortechnology.Thesemeanscanbeusedtoimprovethelevelofautomation,andbeprofoundforthedevelopmentofwaterresource.Firstly,thepaperstudiedanddesignedtheoverallprogram ofthesystem,analyzedthefunctionofthesystem
5、,determinedthedistributedcontrolsystemasthe structureofthesluicemonitoringsystem,andintroducedthesoftwareandhardwareofthesystem.Secondly,thesystemusedhydraulichoistwhichhadcharacteristicsofsmallvolume,bigliftingweightandrigidload,ahighdegreeofautomation,security,reliabilityandsoo
6、ntocontrolgate’smovements.Andthepaperstudiedthesynchronizedstrategyofhydraulichoist,designedasolutionwhichisbasedonthecontrolcircuitofelectromagneticdirectionalvalve.Moreover,thepaperstudiedtheprincipleofthesoft-starter,designedtheelectricalschematicsofthesoft-starting,introduced
7、theworkprogressofthesoft-startingindetail,andachievedthecontrol,surveillanceandprotectionofthemotor.Finally,wemakedthePLCandthesensor,suchasphotoelectricencoderandpressuretransmitterconnection,establishedtheprocessofthesluicemonitoringsystem,determinedthetypeofPLC,anddesignedthel
8、adderdiagramprogram.KeyWords:DCSHydrauli
