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전원 전압의 불평형과 고조파 전류 보상 및 역률 개선 기능을 가지는 능동전력필터
이종건(Jong-Kun Lee),석줄기(Jul-Ki Seok),이동춘(Dong-Choon Lee) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
In this paper, a novel control scheme compensating for source voltage unbalance and current harmonics and power factor correction in unified active power filter systems combined with shunt passive filters is proposed, where no low/high-pass filter are used in deriving the reference voltage for compensation. Using digital all-pass filters, the phase angle and the reference voltages compensating for harmonic current and unbalanced voltage are derived from the positive sequence component of the unbalanced voltage. The amplitude of d-axis current in a series filter is controlled as zero for power factor correction. The validity of the proposed control scheme has been verified by experimental results.
이재성(Jae Sung Lee),김수평(Soo Pyung Kim),정서호(Seo Ho Chung),이영(Young Lee),정인철(In Cheul Jung),윤원식(Won Sik Yoon),이종건(Jong Kun Lee),천연희(Yeon Hee Cheon),이종승(Chong Seung Yi) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.4
The neonatal lupus syndrome is characterized by skin lesions, hepatic and hematologic abnormalities and congenital heart block. Congenital heart block which is believed to be caused by transplacental passage of the anti-Ro (SSA)/La (SSB) antibodies from mother to infant, is known to occur in 1 in 20,000 live births. In contrast to other manifestation of neonatal lupus syndrome, which usually subside within 6 months after birth, congenital heart block is a permanent and potentially fatal complication. We experienced a case of neonatal lupus syndorme with congenital complete heart block in a newborn of asyptomatic mother with anti-Ro (SSA)/ La (SSB) antibodies.