基于PLC的矿热炉低压无功补偿监控系统的研制
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
针对提高矿热炉工作效率与电网供电质量,研制了一种基于PLC的智能化大功率无功补偿监控系统。它以PLC为主机,自动完成数百个电容组无功补偿的监测与控制,通过现场触摸屏以及远程监测PC机在线修改投切参数,实时显示与存储电网的各个参数。
     本课题进行PC远程监测上位机、触摸屏现场控制上位机、PLC下位机、系统控制柜四个部分的设计。
     PC远程监测上位机以虚拟仪器LabWindows/CVI为开发平台,对电网的各个参数进行显示与存储,以及相应参数曲线的绘制,并能在线对控制参数进行修改以及实时监测电容的投与切。上下位机的数据通信使用RS485总线,并且遵循MODBUS协议,增强了监测仪在工业上的通用性。
     触摸屏现场控制上位机,通过RS232总线能够在控制现场完成实时显示电网参数、控制电容投/切以及修改控制参数等功能,方便了工程人员进行现场调试与控制。
     PLC下位机程序主要实现了与一次侧PDM以及三相二次侧智能电压表进行通信,采集变压器两侧的电网参数并将此参数通过串口上传给上位机进行分析与显示,与此同时接收上位机的控制信号,完成控制动作。在上位机损坏时,PLC独立工作,提高了系统的可靠性。
     系统控制柜方面设计了控制系统的仪表的排布方式以及系统的线路连接的方式,从硬件方面保证了系统的稳定运行。
     按上述方案设计,经过多次试验并已交付用户使用半年,结果表明该监控系统达到了设计要求,且运行稳定。
In order to improve work efficiency of smelting electric furnace and the quality of powersupply, a kind of intelligent power monitoring and controlling system of reactive-powercompensationbased on PLC is developed. System, used PLC as the host, can complete themonitoring and controlling hundreds of capacitor of the reactive compensation automatically.Through the on-site touch-screen and the remote monitoring PC, it also can modify theswitching parameters online , real-time display and store each parameter of the grid.
     The subject is comprised of four designed parts,such as the remote monitoring PC ,on-site touch-screen , PLC and the system control cabinet.
     The remote monitoring PC, used virtual instrument named LabWindows/CVI asdevelopment platform, can display and store each parameter of the grid, draw the curves ofthe corresponding ones, modify the switching parameters, and monitor the capacitance whichis connected or cut. Upper and Lower data communication is using RS485 bus, and followingthe MODBUS protocol, which enhances the monitor's versatility in the industry.
     Touch-screen, which is used controlling on-site through the RS232 bus, can completethese functions, such as real-time display each parameter of the grid, connect or cut thecapacitance, and modify the switching parameters. It facilitates the engineering staff on-sitedebugging and controlling the system.
     The main achievement of lower computer program of PLC is communicating with PDMin transformer primary side and three voltmeters in transformer secondary side, collectingeach parameter of the both sides of the transformer, and uploading these parameters to thehost computer via the serial port for analysis and display. At the same time, it also receives thecontrol signal from the host computer to complete the action of connecting or cutting thecapacitance. When the host computer is damaged, PLC can work independently, which is improving the reliability of the system.
     The design of system control cabinet contains two aspects, which is the pattern ofinstruments’arrangement and the way of system's line connection. It is from hardware toensure the stable operation of the system.
     According to the above designs, after many trials and delivered to users for six months,the results show that the monitoring and controlling system meets the design requirements,and operates stably.
引文
[1]金修海.基于PLC的矿热炉低压补偿系统设计[J].湖北:汉江集团发展计划部,2002.
    [2]安月明,李洪元等.我国矿热电炉能耗现状及节能潜力分析[J].北京:中色镍业有限公司,2008.12
    [3]Walid Hubbi, Takashi Hiyama. Placement of static VAR compensators to minimize powersystem losses,Electric Power Systems Research,2( 1998)95-99
    [4]金修海,赵宗保.低压并联电容器补偿在矿热炉上的应用[J].节能, 2002,(3):42-3.
    [5]陆嘉.基于PLC的乳化液泵智能监控系统研制[学位论文].西南交通大学,2009
    [6]邢博虎,李有玉等.矿热炉二次低压电容补偿装置[J].铁合金,2005,(5):25-27.
    [7]金彦平. PLC控制系统可靠性技术[J].常州工程职业技术学院学报, 2005,(03) .
    [8]郝迎吉等.基于PLC的矿热炉低压无功补偿监控系统的研制[J].自动化与仪表,2010
    [9]徐向民.用户电网实时监测与控制研究[D].广州.华南理工大学博士学位论文.2002.3
    [10]K. Kalaitzakis,et al.,Development of a data acquisition system for remote monitoringof renewable energy systems,Measurement Journal 34 (2003)75–83.
    [11]罗开宇.基于虚拟仪器技术的自动检测设备的开发与研制[学位论文].西安:西北工业大学,2003
    [12]杨华平.基于CAN接口的高精度多路数据采集系统的研制[学位论文].西安:西安科技大学,2007年
    [13]张凤均. LabWindos/CVI开发入门和进阶[M].北京:北京航空航天大学出版社,2001.2~5
    [14]樊润丽.钢丝绳张力数据采集系统的研制[学位论文].西安科技大学,2009年
    [15]Tang Xiaojun,Li WeiPing,Liu Junhua.Virtual instrument for calibrating of multi-sensortesting system base on LabWindows/CVI. School of Electriacl Engineering,Xi’anJiaotong University,2007
    [16]张毅刚.虚拟仪器软件开发环境Lab Windows/CVI6.0编程指南[M].北京:机械工业出版社,2002
    [17]李敏智.基于Labwindows/CVI的数据采集与监控系统的设计与实现:[学位论文].武汉理工大学,2009
    [18]Radu Lucian Olteanu, Crinela Dumitrescu, Gabriel Gorghiu, Laura Monica Gorghiu,Related aspects to the impact of virtual instruments implementation in the teachingprocess, Procedia - Social and Behavioral Sciences, 1(2009)780-784
    [19]孙晓云等.基于LabWindows/CVI的虚拟仪器设计与应用,北京:电子工业出版社,2005
    [20]薛源.基于LabW1ndows/CVI平台的虚拟仪器的设计与开发:[学位论文].东北大学,2005
    [21]程刚.在Labwindows/CVI环境下开发基于虚拟仪器技术的引控数据采集系统:[学位论文].四川大学,2003
    [22]Salvatore Nuccio, Ciro Spataro, Assessment of virtual instruments measurementuncertainty, Computer Standards & Interfaces, 1(2001) 39-46
    [23]SHAHID E.KHALID.Advanced Topics in LabWindows/CVI[M].National Instruments,2001
    [24]董刚,周明华.一种面向工业控制的串口通信控制技术,梅山科技,2006
    [25]王飞.基于RS485的PC与智能仪表通信系统设计[J].微计算机信息,2009
    [26]李成,王鹏等. RS-485总线的高速串行远距离数据传输方法,清华大学学报(自然科学版),2009
    [27]艾军.MODBUS通信协议在能源公司控制系统中的应用[J].梅山科技,2007.3
    [28]潘洪跃.基于MODBUS协议通信的设计与实现[J].测量与设备,2002
    [29]张琼.MODBUS通讯协议在串行通讯的应用[J].科技创新导报,2008
    [30]王孝良,徐勇.电网谐波的实时测量[J].电测与仪表,2003.10
    [31]华保祥.数控旧轨整形机总体与控制系统设计[学位论文].西南交通大学,2009
    [32]刘立伟.LED彩屏墙系统的设计[学位论文].南京航空航天大学,2009年
    [33]EasyBuilder8000说明书,威纶通科技有限公司
    [34]DVP-PLC应用技术手册(程序篇),中达电通股份有限公司,2008
    [35]DVP-PLC应用技术手册(101例),中达电通股份有限公司,2008
    [36]S. Da'na, A. Sagahyroon, A. Elrayes, A.R. Al-Ali, R. Al-Aydi, Development of amonitoring and control platform for PLC-based applications, Computer Standards &Interfaces, 3(2008)157-166
    [37]刘冬明.基于ARM的嵌入式系统在电网远程监控中的应用[D].江苏大学硕士论文,2005.6
    [38]PDM-800AC/ACM系列智能综合电量变送器产品使用手册,丹东华通测控有限公司,
    [39]宇电AI-501系列智能化测量报警仪表使用说明,厦门宇电自动化科技有限公司

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700