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Improvement to observability measures of LFO modes in power systems with DFIGs

Improvement to observability measures of LFO modes in power systems with DFIGs Observation of the low-frequency oscillation (LFO) modes in power systems is important to design the damping scheme. The state equations of the power system with the doubly-fed induction generators (DFIGs) are derived to find the LFO modes related to the synchronous generator (SGs) and the DFIGs. The definition of the observability measure is improved to consider the initial output and the attenuation speed of the modes. The sensitivities of the observability measures to the control parameters are derived. The numerical results from the small and large-disturbance validate the LFO modes caused by the DFIGs, and different observability measures are compared. Adjustment of the control parameters is chosen based on the sensitivity model to improve the observability and damping ratio of the LFO mode, and the stability of the wind power system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Frontiers in Energy" Springer Journals

Improvement to observability measures of LFO modes in power systems with DFIGs

"Frontiers in Energy" , Volume 15 (2) – Mar 29, 2019

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Publisher
Springer Journals
Copyright
Copyright © Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019
ISSN
2095-1701
eISSN
2095-1698
DOI
10.1007/s11708-019-0617-z
Publisher site
See Article on Publisher Site

Abstract

Observation of the low-frequency oscillation (LFO) modes in power systems is important to design the damping scheme. The state equations of the power system with the doubly-fed induction generators (DFIGs) are derived to find the LFO modes related to the synchronous generator (SGs) and the DFIGs. The definition of the observability measure is improved to consider the initial output and the attenuation speed of the modes. The sensitivities of the observability measures to the control parameters are derived. The numerical results from the small and large-disturbance validate the LFO modes caused by the DFIGs, and different observability measures are compared. Adjustment of the control parameters is chosen based on the sensitivity model to improve the observability and damping ratio of the LFO mode, and the stability of the wind power system.

Journal

"Frontiers in Energy"Springer Journals

Published: Mar 29, 2019

Keywords: wind power system; low-frequency oscillation (LFO); observability measure; sensitivity; doubly-fed induction generator (DFIG)

References