Imperial College London
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Professor Tim Green, FREng

Faculty of Engineering, Department of Electrical and Electronic Engineering

Academic Leader for Sustainability, Professor
 
 
 
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Contact

 

+44 (0)20 7594 6171t.green Website CV

 
 
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Location

 

1107EElectrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Green:2021:10.1016/j.ijepes.2020.106580,
author = {Green, T and Liu, H and Li, B and Wen, W and Zhang, J and Ning, Z and Chen, L},
doi = {10.1016/j.ijepes.2020.106580},
journal = {International Journal of Electrical Power and Energy Systems},
title = {Ultra-fast current differential protection with high-sensitivity for HVDC transmission lines},
url = {http://dx.doi.org/10.1016/j.ijepes.2020.106580},
volume = {126},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Protection of transmission lines is the most important defense against faults in multi-terminal HVDC system. Up until now, no single protection can balance the operation speed and sensitivity needed for all fault types. To solve this problem, a novel current differential protection for HVDC transmission line is proposed in this paper. The intrinsic properties of a HVDC transmission line are analyzed first. Then, essence of ideal current differential protection is revealed and fundamental relations between line models and performance degradation of existing differential protections are discussed. Based on this analysis, a novel current differential protection scheme, including fault detection and faulty pole selection, is developed, and Bergeron model is used to describe the electrical wave propagation process along line, resulting in only simple computations are needed in each calculation cycle. Finally, a simulation model of Wudongde ± 800 kV HVDC project in China is established in PSCAD/EMTDC for verification. By discussing diversified faults and transient processes, simulation results prove that regardless of fault type, distance and transition impedance, the proposed differential protection can respond correctly. Main contribution of this paper is reducing the operation time of differential protection from hundreds of milliseconds to several milliseconds.
AU  - Green,T
AU  - Liu,H
AU  - Li,B
AU  - Wen,W
AU  - Zhang,J
AU  - Ning,Z
AU  - Chen,L
DO  - 10.1016/j.ijepes.2020.106580
PY  - 2021///
SN  - 0142-0615
TI  - Ultra-fast current differential protection with high-sensitivity for HVDC transmission lines
T2  - International Journal of Electrical Power and Energy Systems
UR  - http://dx.doi.org/10.1016/j.ijepes.2020.106580
UR  - http://hdl.handle.net/10044/1/84859
VL  - 126
ER  -
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