简介:提出了基于Client/Sever体系结构的建材检测管理系统的设计原则及具体实现方案,介绍了系统的主要功能.
简介:OnOctober22thisyear,theLiaoning-Changchun-Jilin-Harbin-Jiamusi500kVtransmissionandsubstationprojectpassedtheacceptancetest.Itwasjudgedtheexcellentgrade.Thetransmissionlinehasatotallengthof1064kmandisthesecondnetworkframeinthenortheasternpartofChina.Itwi
简介:本项目利用西门子S7-300系列PLC完成了对原有换热系统的改造。原有换热系统通过手动设定PID表的温度设定值来达到对换热阀门开度大小的控制,改造后换热系统由半自动控制系统转换为全自动控制系统,并最大限度的利用了回收的凝结水的热量。
简介:InMarchthisyear,theGovernmentofJiangsuXinghuaCityarrivedatanagreementonabiomassstrawpowergenerationprojectwithAsianPowerIndustryInvestmentCo.Ltd.(Singapore)inMaoshanTown,XinghuaCity.Theprojectwillbeinstalledwithtwo12-MWgeneratingunitsandwillbeabletoproduce120GWhofelectricityayear.
简介:220-kVandaboveclasstransmissionandsubstationfacilitiesIn2005therewere325supplyenterprises(including29EHVtransmissionandsubstationenterprises)and221generationenterprisesalloverthecountry.Mainreliabilityindexesof13kindsoftransmissionandsubstationfacilitiesin2004and2005areshowninTable1.Itcanbeenseenthatthereliabilityindexesin2005remainedatahighJevel,andtheiravailabilityfactorcameuptoover98%.Thisembodiedthattheenterpriseswerestillabletoputthereliabilitymanagementworkinthe
简介:1.ThepresentmanufacturingsituationofChina’sthermalpowergenerationequipmentBytheyear1995.developmentofChina’selectricpowerindustryhasexperiencedacourseofahundredyears.Overaperiodoftheinitial50years.China’sdevelopmentofelectricpowerwasslow.Atthetimeof1949,thetotalinstalledcapacityinChinawas1,850MWandtheelectricitygeneratedwasonly4.3billionkWh.Duringthepast46yearsafter1949,herannual
简介:Likeothercountriesintheworld,itisinevitabletoencoun-terwithsomeenvironmentproblemsintheprocessofen-ergydevelopmentandutilization.ItisespeciallysoinChinawhereenergystructureismainlybasedoncoal.Atpresent,coaltakes74%ofthetotalprimaryenergywhileoutofthe74%,only23%hasbeenconvertedintocleanandconvenientelectncenergy.Sopredomi-nately,theairpollutioninChinaismainlycausedbycoalsmoke.Inlargecities,theairpollutionbydirectcoalburningisbecomingmoreandmoreoutstandingduetothefastdevelopmentofindustryand
简介:文章对S11-M·R系列变压器在降低空载损耗和减小空载电流方面进行了论述和比较。得出了采用S11-M·R系列变压器,在降低功率损失、减小空载电流、使用寿命和投资回收等方面的突出优势,是较为理想的选择。