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황환영(Hwan-young Hwang),최원호(Won-ho Choi),노경호(Kyung-Ho No),박종연(Chong-yeun Park) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper proposed the new harmonic detection system for the source current with the large frequency variation. The harmonic detection system is designed of the analog circuit and is composed of a low pass filter, a DC-level converter using the PLL, the Voltage controlled GIC.
정동열(Dong-Youl Jung),황환영(Hwan-Young Hwang),박종연(Chong-Yeun Park) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
The current harmonic detector consists of the load current detector and the notch filter. It obtains the harmonic current from the output of the load current detector using the Notch filter. The GIC in the notch filter is used instead of inductor to minimize the magnitude and phase characteristics variation caused by using twin-T notch filter and passive elements(inductor).
전원의 고조파 제거를 위한 Hybrid Filter의 실현
방선배(Sun-Bae Bang),정동열(Dong-Youl Jung),황환영(Hwan-Young Hwang),박종연(Chong-Yeun Park) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper proposed Hybrid Filter for harmonics elimilation on the power line. It's control method is very simple, but its permance is better than the results by passive filter. For the harmonics elimination, we improved the performance of the BPF(Band-pass Filter) with the GIC(Generalize Impedance Converter), and the new hysterisys controller.