A NovelTechnique toReduceHarmonics ina SixPulse Rectifier
Kaili Xu · 2007
Pulse multiplication methods inbothparallel and electronics equipment (1-4). Toreduce accurrent harmonics, series connected converters arewellknowntoreduce harmonics. methodofincreasing thenumberofpulses orphases ofthe A novel technique withfewer thyristors isproposed inthis paperrectifier circuit and/or usingharmonics filters intheacline toachieve higher pulses. Theproposed scheme usesthree re- sidehavebeenpopular. Thesemethods, however, often result injection thyristors, two re-injection transformers, and an ' averaging inductor toachieve 18-pulse operation ofa6-pulseinconsiderable increase inthecostandsizeoftheapparatus rectifier. Thistechnique will reduce thecostand/or complexity becauseoftheincrease inthyristor elements ortheextra forthyristor operation andharmonics filters. addition ofphasetransformer. Various schemes forreducing theac sideharmonics havebeenproposed by different IndexTerms-Harmonics, Thyristor Rectifier, Pulseinvestigators. Thefirst technique wascarried outbyadding a Multiplication harmonic current fromanexternal source. Theripple voltage atthedcterminal isdirectly usedinmanynewmethods to produce there-injection current. Pulse multiplication methods A,B,C Commutation transformer primary winding phases inbothparallel andseries connected rectifiers havebeen a,b,c Commutation transformer secondary winding phasesproposed toreduce harmonics (5-10). N1 Commutation transformer primary winding number Theparallel-connected converter schemes takeadvantage ofturns