연료전지용 PCS의 출력 전류 리플 개선을 위한 노치 필터 설계
The Notch Filter Design for Mitigation Current Ripple of Fuel cell-PCS
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초록
Asafuelcellconvertsthechemicalenergyofthefuelcellintoelectricalenergybyelectrochemicalreaction,thefuelcellsystem isuniquelyintegratedtechniqueincludingfuelprocessor,fuelcellstack,powerconditioning system.Theresidentialfuelcell-PCS(PowerConditioning System)needstoconvertefficientlytheDC current producedbythefuelcellintoAC currentusingsingle-phaseDC-AC inverter.A single-phaseDC-AC inverter hasnaturallylow frequencyripplewhichistwicefrequencyoftheoutputcurrent.Thislow frequency(120Hz)ripplereducestheefficiencyofthefuelcell. ThispaperpresentsnotchfilterwithIPvoltagecontrollertorejectspecific120Hzcurrentrippleinsingle-phase inverter.Thenotchfilterisdesignedthatsuppressjustonlyspecificfrequencycomponentandnophasedelay. Finally,theproposednotchfilterdesignmethodhasbeenverifiedwithcomputersimulationandexperimentation.
Abstract
Asafuelcellconvertsthechemicalenergyofthefuelcellintoelectricalenergybyelectrochemicalreaction,thefuelcellsystem isuniquelyintegratedtechniqueincludingfuelprocessor,fuelcellstack,powerconditioning system.Theresidentialfuelcell-PCS(PowerConditioning System)needstoconvertefficientlytheDC current producedbythefuelcellintoAC currentusingsingle-phaseDC-AC inverter.A single-phaseDC-AC inverter hasnaturallylow frequencyripplewhichistwicefrequencyoftheoutputcurrent.Thislow frequency(120Hz)ripplereducestheefficiencyofthefuelcell. ThispaperpresentsnotchfilterwithIPvoltagecontrollertorejectspecific120Hzcurrentrippleinsingle-phase inverter.Thenotchfilterisdesignedthatsuppressjustonlyspecificfrequencycomponentandnophasedelay. Finally,theproposednotchfilterdesignmethodhasbeenverifiedwithcomputersimulationandexperimentation.
참고문헌 (3)
- Seung-min Kim, "The Feed-forward Controller and Filter design of Single-Phase Power Conditioning System for Mitigation Current Ripple", KSES Spring annual conference (2012)
- KOTATOHIRANO, "DesignofDigital Notch Filters", IEEE TRANSACTIONS on COMMUNICATIONS, 22(7,) (1974)
- 양승대, "3상 양방향 인버터의 계통전압 불평형 및 왜곡에 의한 계통전류 보상", 한국태양에너지학회 논문집, 32(3), pp.228~234 (2012), 한국태양에너지학회[DOI]