简介:Therearedifferentlayoutschemesfor330-500kVswitchyardwithoneandahalfbreakerconfiguration.However,asfarastheUHVswitch-yardsforpowerplantsconcerned,itisobviousthatsomelayoutschemestakeuptoomuchareaandsomeothersarenotcompatiblewiththegenerallayoutofpowerplants.Inordertoovercometheaboveproblems,anewalignedswitchyardlayoutscheme,i.e.,allcircuitbreakersanddisconnectingswitchesarealignedinonerowisdiscussedinthispaper.
简介:Likeothercountriesintheworld,itisinevitabletoencoun-terwithsomeenvironmentproblemsintheprocessofen-ergydevelopmentandutilization.ItisespeciallysoinChinawhereenergystructureismainlybasedoncoal.Atpresent,coaltakes74%ofthetotalprimaryenergywhileoutofthe74%,only23%hasbeenconvertedintocleanandconvenientelectncenergy.Sopredomi-nately,theairpollutioninChinaismainlycausedbycoalsmoke.Inlargecities,theairpollutionbydirectcoalburningisbecomingmoreandmoreoutstandingduetothefastdevelopmentofindustryand
简介:Powerindustryisoneofthekeyfieldsforenergyconservationandemissionsreduction(ECER)inChina.Inordertoachievethenation'soverallenergyconsumptiontargetandpollutantemissiontargetsetbythe11thFive-YearPlan,tobuildtheresource-conservationandenvironment-friendlysocietyduringthe11thFive-YearPlanperiod(2006-2010),itiscrucialtoimplementthepolicyof"Large(units)InandSmall(units)Out(LISO)"(i.e.,replacingsmallunitswithlargeones)andacceleratetheretir...