A Fast and Robust Grid Synchronization Algorithm of a Three-phase Converters under Unbalanced and Distorted Utility Voltagesopen access
- Authors
- Kim, Kwang-Seob; Hyun, Dong-Seok; Kim, Rae-Yong
- Issue Date
- May-2017
- Publisher
- SPRINGER SINGAPORE PTE LTD
- Keywords
- Three-phase power converter; Grid synchronization; Phase locked loop(PLL); Enhanced second order generalized integrator(ESOGI)
- Citation
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY, v.12, no.3, pp.1101 - 1107
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
- Volume
- 12
- Number
- 3
- Start Page
- 1101
- End Page
- 1107
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/152441
- DOI
- 10.5370/JEET.2017.12.3.1101
- ISSN
- 1975-0102
- Abstract
- In this paper, a robust and fast grid synchronization method of a three-phase power converter is proposed. The amplitude and phase information of grid voltages are essential for power converters to be properly connected into the utility. The phase-lock-loop in synchronous reference frame has been widely adopted for the three-phase converter system since it shows a satisfactory performance under balanced grid voltages. However, power converters often operate under abnormal grid conditions, i.e. unbalanced by grid faults and frequency variations, and thus a proper active and reactive power control cannot be guaranteed. The proposed method adopts a second order generalized integrator in synchronous reference frame to detect positive sequence components under unbalanced grid voltages. The proposed method has a fast and robust performance due to its higher gain and frequency adaptive capability. Simulation and experimental results show the verification of the proposed synchronization algorithm and the effectiveness to detect positive sequence voltage.
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