Journal of Power Electronics

  • 제20권5호
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  • Pages.1261-1272
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  • 2020
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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DOI QR코드

DOI QR Code

Digital implementation methods for grid synchronization using an integrated filter

  • Park, Yongsoon (School of Integrated Technology, Gwangju Institute of Science and Technology (GIST)) ;
  • Moon, Dong-Hyun (School of Integrated Technology, Gwangju Institute of Science and Technology (GIST)) ;
  • Heo, Geon (School of Integrated Technology, Gwangju Institute of Science and Technology (GIST))
  • 투고 : 2020.01.21
  • 심사 : 2020.06.12
  • 발행 : 2020.09.20
⟨ 이전 논문 다음 논문 ⟩

초록

The steady rise in the deployment of grid-connected inverters is driving a need for more efficient and accurate grid synchronization techniques. In this paper, digital implementation methods are proposed to increase grid synchronization accuracy when an integrated filter is used. First, a method to compensate for the computational delays in the implementation of integrated filters with numerical integrations is presented. Second, a simple method to estimate the grid frequency is introduced for updating the center frequency of integrated filters. The proposed methods have been implemented in a digital signal processor and tested with a real-time simulator. They achieve ripple errors of 0.14 mHz and 0.008° in the frequency and phase angle estimations, respectively.

키워드

과제정보

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20181210301380).

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