Relative stability evaluation of HVDC-connected wind farms

The small-signal stability of high voltage direct current (HVDC)-connected wind farms (WFs) is a challenging issue in modern power systems. The relative stability, i.e., the stability margin, of such a typical multiple-input multiple-output (MIMO) system is quite difficult to be quantified. This pap...

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Bibliographic Details
Published in:Frontiers in energy research 2024-07, Vol.12
Main Authors: Jiang, Kezheng, Ye, Chang, Zheng, Wanning, Chen, Yang, Xiong, Ping, Li, Lie, Hu, Pan
Format: Article
Language:English
Subjects:
HVDC
robust stability margin
stable region
wind farms
ν-gap metric
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Summary:The small-signal stability of high voltage direct current (HVDC)-connected wind farms (WFs) is a challenging issue in modern power systems. The relative stability, i.e., the stability margin, of such a typical multiple-input multiple-output (MIMO) system is quite difficult to be quantified. This paper evaluates the relative stability of HVDC-connected WFs using a new stability index based on the ν -gap metric. We first develop a MIMO model represented by a transfer function matrix of the HVDC-connected WFs. Then, a new stability index, i.e., the robust stability margin, based on the ν -gap metric is proposed to quantify the relative stability of such a MIMO system. Finally, we propose a method to compute the stable region of control parameters based on the corresponding stability criterion of ν -gap metric. Case studies are given to demonstrate the effectiveness of the proposed method.
ISSN:2296-598X
2296-598X
DOI:10.3389/fenrg.2024.1379009