简介:Astheopeningyearofthe'TwelfthFive-YearPlan,'drivenbythesteadyandfasteconomicgrowth,theyearof2011sawChina'srisingdemandforelectricity,resultinginregionalpowershortages.Subjectedtomultiplefactorssuchastheweatherconditions,thecontradictionsbetweencoalsupplyandpowergenerationandthestructuralproblemsinthepowersystem,powersupplyshortageacrossthenationbecameincreasinglycritical.Atthesametime,theNortheastandNorthwestChina,plusInnerMongolia,oftenexperiencedpowergenerationsurplusanddifficultiesinsendingpowertootherregions.Thispaperreviewstheoverallsituationofthenationalelectricpowersupplyin2011,elaboratesonthecurrentcontradictionsinthepowerdemandandsupplyandpresentsanin-depthanalysisofcausesandcorrespondingcountermeasures.
简介:SponsoredbytheInternationalElectrotechnicalCommission(IEC),andcosponsoredbyorganizationsincludingtheChineseSocietyofElectricalEngineering,theSecondAnnualAsia
简介:TheChinaElectricityCouncilpublishedthereportontheanalysisofpowersupplyanddemandsituationacrossthecountryin2011recently.Accordingtothereportitisforecastedthatin2011,China'seconomywillkeepsteadyandfastgrowth,andpowerdemandwillcontinuetoincrease.Theelectricityconsumptionofthewholesocietyacrossthecountrywillreachabout4700TWhwithayear-on-yeargrowthofabout12%,whichwillslowdowntosomeextentascomparedwith2010.Withtheimplementationofindustrialdevelopment,energy-savingmeasuresandtariffpolicies,thegrowthandstructureofelectricityconsumptionwillbegreatlyimproved.
简介:PurchasetransactionsatgenerationsideIn2011,thepurchasetransactionsofelectricitycarriedoutbytheStateGridCorporationofChina(SGCC)amountedto3047TWhatgenerationside(powerplantsunderunifieddispatch),up12.6%onayear-on-yearbasis.Ofallthepurchasetransactions,2612TWhwerethermalpower,349.4TWhhydropower,41.2TWhwindpower,and44.4TWhwereotherpowersources.Thepurchasetransactionsofelectricityatthegenerationsideintenprovincial-levelgridstotaledmorethan100TWh.TheseincludetheNorthHebei,Hebei,Shanxi,Shandong,Jiangsu,Zhejiang,Fujian,Henan,Sichuan,andLiaoninggrids.ThepurchasetransactionsintheJiangsugridreached338.7TWh,rankingfirstamongallprovinces.NingxiaandXinjiangsawratherlargegrowthinthepurchasetransactionofelectricityatthegenerationside.ThegrowthrateinNingxiawas75%.Table1showsthepurchasetransactionsofelectricityatthegenerationsidein2011.
简介:Beforethe2012SpringFestival,China'sfivebigpowergenerationgroups,i.e.ChinaHuanengGroup,ChinaDatangCorporation,ChinaGuodianCorporation,ChinaHuadianCorporationandChinaPowerInvestmentCorporationseparatelyheldtheirannualworkingconferencetosumuptheachievementsin2011andarrangetheworkingplanfor2012.
简介:为了研究双定子永磁同步电机两套定子绕组电枢反应对气隙磁场的影响,分别对双定子永磁同步电机内外定子空载、外定子负载内定子空载、外定子空载内定子负载和内外定子负载4种情况下,定子绕组电枢反应对内外气隙磁场的影响进行分析。通过建立等效磁路,推导出气隙磁密的解析表达式。经分析比较,结果显示外定子绕组电枢反应对外气隙磁场影响较大,其影响程度可由外磁路漏磁阻与外层永磁体内磁阻之比反映,而对内气隙磁场几乎无影响;同样,内定子绕组电枢反应对内气隙磁场影响较大,其影响程度可由内磁路漏磁阻与内层永磁体内磁阻之比反映,而对外气隙磁场几乎无影响。最后用有限元法进行仿真验证。