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Open Access

Corrections of Original CFPREV Control in LCC-HVDC Links and Analysis of Its Inherent Plateau Effect

Dachuan Tian ( ), Xiaofu Xiong
College of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
School of Electrical Engineering, Chongqing University, Chongqing 400044, China
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Abstract

The most effective approach to suppressing the first commutation failure (CF) of the LCC-HVDC link at fault inception is to advance firings of the inverter, and the commutation failure prevention (CFPREV) control is the most commonly used method in practical engineering. However, it is discovered in this study that there exist a few serious defects in its original scheme, and thus targeted vital corrections were made. Furthermore, an interesting phenomenon termed the plateau effect, which states that an excessive advancement of firings will contrarily and inevitably lead to more commutation failures, is also revealed and analyzed. It turns out that the inherent commutation dents of the Graetz bridge should be primarily responsible, which bridges the knowledge gap and further enhances the cognition of the limitation of CFPREV control, and it may also be conducive to the design of related control parameters. Simulation results then validate the necessity of these presented corrections and confirm the existence of the plateau effect.

Keywords

Commutation failureCFPREVLCC-HVDC transmissionplateau effect

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CSEE Journal of Power and Energy Systems
Volume 8 Issue 1,
January 2022
Pages 10-16
DOI: 10.17775/CSEEJPES.2020.05700
Cite this article:
Tian D, Xiong X. Corrections of Original CFPREV Control in LCC-HVDC Links and Analysis of Its Inherent Plateau Effect. CSEE Journal of Power and Energy Systems, 2022, 8(1): 10-16. https://doi.org/10.17775/CSEEJPES.2020.05700

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Received: 27 October 2020
Revised: 11 December 2020
Accepted: 18 February 2021
Published: 10 September 2021
© 2020 CSEE
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