Synchronization issues with irregular current injection islanding detection methods in multi-DG operation

Liu, M.H.; Zhao, W.; Wang, Q.; Huang, S.L.; Shi, K.P.

doi:10.1109/icgea.2019.8880795

Synchronization issues with irregular current injection islanding detection methods in multi-DG operation

Liu, M.H.; Zhao, W.; Wang, Q.; Huang, S.L.; Shi, K.P.

Authors

M.H. Liu

W. Zhao

Dr Qing Wang qing.wang@durham.ac.uk
Associate Professor

S.L. Huang

K.P. Shi

Abstract

The islanding detection methods that detect an island through injecting high/low frequency currents or negative sequence currents are called irregular current injection methods in this paper. A synchronization issue of such methods is raised in multi-DG (Distributed Generation) operation. This issue requires that the same frequency irregular currents injected by DG units should be in phase to avoid cancelling each other out. If this issue is not handled properly, the effect of such methods is uncontrollable. In view of this, an approach to this issue is proposed in this paper. According to this approach, the terminal voltage of a DG unit is taken as a reference to conduct the irregular current injection, and only parts of the irregular currents whose frequencies are an integer multiple of the frequency of the reference voltage are employed. Finally, experiments and simulations verify the effect of the proposed approach.

Citation

Liu, M., Zhao, W., Wang, Q., Huang, S., & Shi, K. (2019). Synchronization issues with irregular current injection islanding detection methods in multi-DG operation. In 2019 3rd IEEE International Conference on Green Energy and Applications ; proceedings (21-29). https://doi.org/10.1109/icgea.2019.8880795

Conference Name	2019 3rd IEEE International Conference on Green Energy and Applications
Conference Location	Taiyuan University of Technology, Taiyuan China
Acceptance Date	Jan 30, 2019
Publication Date	Jan 1, 2019
Deposit Date	Mar 26, 2019
Publicly Available Date	Nov 13, 2019
Publisher	Institute of Electrical and Electronics Engineers
Pages	21-29
Book Title	2019 3rd IEEE International Conference on Green Energy and Applications ; proceedings.
DOI	https://doi.org/10.1109/icgea.2019.8880795

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