Assessment and enhancement control for small‐signal voltage stability of VSC‐HVDC systems supplying passive industrial loads

Autor: Yicheng Xue, Zheren Zhang, Wen Hua, Guoteng Wang, Zheng Xu, Wei Dong
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: IET Generation, Transmission & Distribution, Vol 17, Iss 19, Pp 4235-4247 (2023)
Druh dokumentu: article
ISSN: 1751-8695
1751-8687
DOI: 10.1049/gtd2.12785
Popis: Abstract This paper presents a comprehensive assessment for the small‐signal voltage stability of voltage source converter (VSC)‐HVDC systems supplying industrial loads represented by the induction motors (IMs) and provides a stability enhancement control for the VSCs. First, the steady‐state voltage stability is analysed to seek the factors that affect the existence of the stable equilibrium point. Then, the small‐signal voltage stability analysis is performed based on the developed linear model. Eigenvalue analysis is carried out to capture the critical factors that induce instability phenomena correlative to the system voltage. It demonstrates that decreasing either the proportional gain K of the VSC's PI controller or the electrical distance between the VSC and IM is detrimental to voltage stability. Next, the enhancement control strategy is elaborated. It adopts virtual reactance and virtual admittance control for the VSC to improve the voltage control capability. Finally, the effectiveness and robustness of the proposed enhancement control are validated via time‐domain simulations in a multi‐IM system supplied by VSC‐HVDC.
Databáze: Directory of Open Access Journals
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