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Influence of active power output and control parameters of full-converter wind farms on sub-synchronous oscillation characteristics in weak grids

Hao, Yafeng, Liang, Jun, Wang, Kewen, Wu, Guanglu, Joseph, Tibin and Sun, Ruijuan 2020. Influence of active power output and control parameters of full-converter wind farms on sub-synchronous oscillation characteristics in weak grids. Energies 13 (19) , 5225. 10.3390/en13195225

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Abstract

Active power outputs of a wind farm connected to a weak power grid greatly affect the stability of grid-connected voltage source converter (VSC) systems. This paper studies the impact of active power outputs and control parameters on the subsynchronous oscillation characteristics of full-converter wind farms connected weak power grids. Eigenvalue and participation factor analysis was performed to identify the dominant oscillation modes of the system under consideration. The impact of active power output and control parameters on the damping characteristics of subsynchronous oscillation is analysed with the eigenvalue method. The analysis shows that when the phase-locked loop (PLL) proportional gain is high, the subsynchronous oscillation damping characteristics are worsened as the active power output increases. On the contrary, when the PLL proportional gain is small, the subsynchronous oscillation damping characteristics are improved as the active power output increases. By adjusting the control parameters in the PLL and DC link voltage controllers, system stability can be improved. Time-domain results verify the analysis and the findings

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Additional Information: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Publisher: MDPI
ISSN: 1996-1073
Date of First Compliant Deposit: 3 November 2020
Date of Acceptance: 1 October 2020
Last Modified: 03 Nov 2020 10:46
URI: http://orca.cardiff.ac.uk/id/eprint/136089

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