A Two-Stage Simultaneous Control Scheme for the Transient Angle Stability of VSG Considering Current Limitation and Voltage Support

Sun, Kun, Yao, Wei, Wen, Jinyu and Jiang, Lin ORCID: 0000-0001-6531-2791 (2022) A Two-Stage Simultaneous Control Scheme for the Transient Angle Stability of VSG Considering Current Limitation and Voltage Support IEEE TRANSACTIONS ON POWER SYSTEMS, 37 (3). pp. 2137-2150. ISSN 0885-8950, 1558-0679

Text Paper-TPWRS-00357-2021.Final.pdf - Author Accepted Manuscript Download (1MB) | Preview

Abstract

Since the wide application of virtual synchronous generators (VSGs), the power grid faces great challenges in the safe and stable operation due to their limited thermal capacity and weak anti-disturbance ability. During transient period, for example, a fault occurs in the transmission line, the VSG may lose the transient angle stability and provoke the current hard limit. Even if the fault is cleared by tripping of line, it still faces the problem of instability and voltage dips. To address this problem, in this paper, the post-fault large-signal model of VSG is derived first via the travelling waves based fault information acquisition. Subsequently, with the effect of both active and reactive power loops taken into account, a two-stage simultaneous control scheme is proposed for improving the transient stability of VSG, while considering the current limitation during fault state and voltage support after fault clearance. This method is fulfilled by mode switching and an additional feedback control based on the fault signal. Finally, the effectiveness of the proposed method under both symmetrical and asymmetrical faults is verified. Moreover, the application of the proposed method in a multiple VSGs system is also verified. Besides, the robustness to parameter mismatch and the feasible operating region for the method are discussed.

Item Type:	Article
Uncontrolled Keywords:	Transient analysis, Power system stability, Stability analysis, Impedance, Reactive power, Voltage control, Switches, Virtual synchronous generator, large-signal model, fault, transient angle stability, current limitation, voltage support
Divisions:	Faculty of Science & Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	20 Oct 2021 08:40
Last Modified:	16 Jun 2026 11:25
DOI:	10.1109/TPWRS.2021.3121474
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3140978
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.