IntroductionWithever-increasingofpowersources,thecapabilityofpowersupplywasfurtherenforcedin2007.Thismetthestrongdemandofnationaleconomydevelopment.Restruc-turingofpowersourceswasdeepening,ofwhich"substi-tutinglargepowerunitsforsmallones"startedwell,theinstalledcapacityofwindpowerwasdoubledandobviousresultswereachievedintheenergy-conservationandpollu-