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Analysis and study for MPPT algorithms in transformerless PV PCS
이경수(Kyung-Soo Lee),정영석(Young-Seck Jung),소정훈(Jung-Hoon So),유권종(Gwon-Jong Yu),최재호(Jae-Ho Choi) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Maximum power point tracking(MPPT) is usually used for a solar power system. Many maximum power tracking techniques have been considered in the past. The microprocessors with appropriate MPPT algorithms are favored because of their flexibility and compatibility with different solar arrays. In this paper, four MPPT algorithms are analyzed and studied. Perturbation and Observation(P&O), Incremental Conductance(IncCond), which are used from the past. Improved P&O and Two-mode , which are developed P&O and IncCond algorithms. Also, the author introduces grid-connected transformerless PV PCS to apply MPPT control. MPPT efficiency is measured by changing irradiance from 0.1㎾/㎡ to 1㎾/㎡ and simulation was performed for each MPPT algorithm.
자기결합 무손실 스너버를 갖는 새로운 고역률 단일전력단 AC/DC 컨버터
노정욱(Chung-Wook Roh),문건우(Gun-Woo Moon),정영석(Young-Seck Jung),윤명중(Myung-Joong Youn) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
A new single-stage-single-switched forward converter with magnetic coupled nondissipa-tive snubber is proposed. The proposed converter gives the good power factor correction (PFC), low current harmonic distortion, and tight output voltage regulation. The prototype shows the IEC 555-2 requirements are met satisfactorily with nearly unity power factor. This proposed converter with magnetic coupled nondissipative snubber is particularly suited for low power level power supply applications.