简介:IntroductionInrecent10years,duetofastdevelopingofeconomyinChina,seriouspowershortageoccurs.Thesystemfrequencyoftenfelltoabnormalvaluesinmostnetworks.Forthesecurityofpowersystems,forcedswitchoffoffeedersfromthedistributionsubstationoftenhappendtorecovernormalfrequency.Infact,thespeedofdevelopmentofChinesepowerindustryisveryhighinthisperiod.Theyearlyaverageincreasingrateofgeneratingcapacitywasabout8%.Theyearlynewlyinstalledca-pacitywasmorethan9000MWinrecent4years.Buttheannual
简介:Summary1.Thereare12powersystemsincluding5regionalpowersystemswithover1000MWofcapacityeach.In1989CentralandEastChinapowersystemswereinterconnectedbya±500kVHVDCLine.2.Thehierarchicalcontrolorganizationcanbedividedinto5levels,i.e.NCC,6RCCs,25PCCs,250DCCsandmorethan2000CCCs.3.AllcontrolcenterswillbeequippedwithSCADAandEMSinthenearfuture.4.Chinapowersystemhasalarge,dedicatedcommunicationnetworkofitsown.
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简介:BackgroundThepowerindustryhaslongbeenplaguedwithcomplicationsandoutagesrelatedtocorrosionofplantcomponents.Priortothemid-sixties,corrosionofboilerwater-walltubeswasoneoftheprominentproblemsinpowerplants.Water-walltubescorrosionproceedingunderironoxidedepositcausedcausticgougingoracidicembrittlementoftubemetal.Manyboilertubesfailedbysuddenrupture.Fieldandlaboratorystudiesshowedthat,carbonatealkalinityandneutralsaltinboilermakeupwatertreated
简介: 农村能源建设是退耕还林等生态环境建设的重要配套措施,具有显著的生态效益、经济效益和社会效益.(国办发[2002]66号)要求,结合退耕还林,切实搞好农村能源建设工作,确保退耕还林'退得下、稳得住、能致富、不反弹'.国务院西部地区开发领导小组办公室为贯彻落实国务院办公厅文件要求,2003年2月24日以国西办经(2003)4号文件,发出,要求西部各省、市、区和新疆生产建设兵团抓紧研究制定西部地区农村能源建设规划和政策.对规划编制的主要原则、范围和重点区域、规划时限、规划的主要内容等提出了要求.……
简介:2004年3月11日国务院以国发[2004]6号文件下发《国务院关于进一步推进西部大开发的若干意见》,全文如下: