Reduced-Order-VSM-Based Frequency Controller for Wind Turbines

Liang Lu; Oscar Saborío-Romano; Nicolaos A. Cutululis

doi:10.3390/en14030528

Reduced-Order-VSM-Based Frequency Controller for Wind Turbines

Liang Lu, Oscar Saborío-Romano, Nicolaos A. Cutululis^*

^*Corresponding author for this work

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Abstract

Frequency support capability is becoming an important requirement for wind turbines, as wind power is increasingly integrated into power systems. In this paper, a frequency controller is implemented and validated. Such a controller allows wind turbines to help regulate the system frequency automatically and includes virtual inertia to help limit the rate of change of frequency. Compared with other methods, the controller achieves satisfactory frequency support capability with considerable simplicity. The controller is added to the grid-side converter controls, together with cascaded inner loops, which enables wind turbines to operate in grid-forming mode with overcurrent protection. The influence of the controller parameters on the frequency response is investigated.

Original language	English
Article number	528
Journal	Energies
Volume	14
Issue number	3
Number of pages	11
ISSN	1996-1073
DOIs	https://doi.org/10.3390/en14030528
Publication status	Published - 2021

Keywords

Wind turbine
Frequency control
Virtual synchronous machine

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AB - Frequency support capability is becoming an important requirement for wind turbines, as wind power is increasingly integrated into power systems. In this paper, a frequency controller is implemented and validated. Such a controller allows wind turbines to help regulate the system frequency automatically and includes virtual inertia to help limit the rate of change of frequency. Compared with other methods, the controller achieves satisfactory frequency support capability with considerable simplicity. The controller is added to the grid-side converter controls, together with cascaded inner loops, which enables wind turbines to operate in grid-forming mode with overcurrent protection. The influence of the controller parameters on the frequency response is investigated.

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KW - Virtual synchronous machine

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Reduced-Order-VSM-Based Frequency Controller for Wind Turbines

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