電網(wǎng)諧波的快速檢測分析及處理對策

1、武漢科技大學(xué)碩士學(xué)位論文電網(wǎng)諧波的快速檢測分析及處理對策姓名：楊鑫申請學(xué)位級別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：劉惠康20081030第1I頁武漢科技大學(xué)碩士學(xué)位論文AbstractTheharmonicsofthepowersystemhavebecomeaseriousprobleminmanycountriesTheuseofnonlinearloadssuch弱staticpowerconvertershaSdeterio

2、ratedpowerqualityinpowertransmission／distributionsystemsActivepowerfilterisrapidlydeveloped嬲alladvancedpowerelectronicdevice，whichcanbeusedforintegratedcompensatingharmonic，reactivecurrentBasedonbothneuralnetworktheoryan

3、dinstantaneousreactivepowertheoryanewcontrolmethodforactivepowerfilterispresentedandthesourcecurrentspikesthatoccurduetosuddenchangesinloadcurrentareeliminatedThismethodmeasuresthefirstderivativeoftheloadcurrentinrealtim

4、etojudgeifthereisasuddenchangeintheloadcurrentIfthereis，theneuralnetworkprogrammodulewillbeputintooperationtocontroltheharmoniccurrentcompensationTheneuralnetworkprogrammoduleistrainedoffline，anduseserrorbackpropagation(

5、BP)algorithm，whichisrealizedthroughathreelayeredfeedforwardneuralnetworkmoduleStudiesonthemaincircuitofactivepowerfilteraredevelopedandthecalculatingmethodfortheparametersofthepowerelectronicselementsandtheirperipheralci

6、rcuitsaregivenInthispapertheresultsofsimulationinSIMULINKenvironmentofMATLABandpracticalexperimentindicatevalidityofthemixedmethodKEYWORDS：Activepowerfilter；instantaneousreactivepowertheory；neuralnetworktheory；mixedcontr