Low frequency current reduction using a quasi-notch filter operated in two-stage DC-DC-AC grid-connected systems
- Authors
- Jung, Hong-Ju; Ha, Keun-Soo; Song, Byeong-Mun; Lai, Jih-Sheng; Hyun, Dong-Seok; Kim, Rae-Young
- Issue Date
- Nov-2011
- Publisher
- IEEE
- Citation
- IEEE Energy Conversion Congress and Exposition: Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings, pp.2746 - 2750
- Indexed
- SCOPUS
- Journal Title
- IEEE Energy Conversion Congress and Exposition: Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings
- Start Page
- 2746
- End Page
- 2750
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/167285
- DOI
- 10.1109/ECCE.2011.6064137
- Abstract
- For a single-phase grid-connected power system, output power is pulsated instantaneously with a double-fundamental frequency. Accordingly, the current drawn from renewable energy sources tends to be pulsated and contains low frequency ripple components, which causes several issues including a power harvesting deterioration and energy source's life shortening. This paper proposes a novel power pulsation decoupling scheme to reduce low frequency ripple current with a fast voltage loop. Proper control design based the small-signal model of two-stage dc-dc-ac converter is presented in a frequency domain analysis, and its experimental waveforms are provided to verify the effectiveness.
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