A Novel Pre-Synchronization Control for Grid Connection of Virtual Synchronous Generator

Authors

  • Xuhai Chen 1PowerChina Fujian Electric Power Engineering Co., Ltd
  • Yiwang Zhang 2College of Electrical Engineering and Automation, Fuzhou University
  • Jiqing Dong 2College of Electrical Engineering and Automation, Fuzhou University
  • Xingkui Mao 2College of Electrical Engineering and Automation, Fuzhou University
  • Jiaqiao Chen 1PowerChina Fujian Electric Power Engineering Co., Ltd
  • Buyin Wen 2College of Electrical Engineering and Automation, Fuzhou University
  • Zhe Zhang Department of Electrical Engineering, Technical University of Denmark

DOI:

https://doi.org/10.5755/j01.eie.26.6.25874

Keywords:

Virtual synchronous generator (VSG), Pre-synchronization control, Droop control, Energy storage

Abstract

The virtual synchronous generator (VSG) introduces rotational inertia and damping through the droop control to take part in frequency regulation of the grid. By building the VSG model, the VSG controller, including both the frequency controller and the excitation controller, are analysed and designed. The analysis shows that the large phase difference Δθ between the VSG voltage and the grid voltage at the grid-tied moment may produce large power and damage the VSG. The proposed pre-synchronization control minimizes the phase difference, which is implemented by replacing Δθ with sinΔθ to avoid any step change from Δθ. The proposed method is able to simplify control, shorten pre-synchronization tracking time, and achieve high accuracy without a phase-lock loop. The built 12 kW VSG simulation and prototype verify the theoretical analysis, the proposed control and its associated design.

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Published

2020-12-18

How to Cite

Chen, X., Zhang, Y., Dong, J., Mao, X., Chen, J., Wen, B., & Zhang, Z. (2020). A Novel Pre-Synchronization Control for Grid Connection of Virtual Synchronous Generator. Elektronika Ir Elektrotechnika, 26(6), 25-31. https://doi.org/10.5755/j01.eie.26.6.25874

Issue

Vol. 26 No. 6 (2020)

Section

RENEWABLE ENERGY

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