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Energies 2017, 10(8), 1108; doi:10.3390/en10081108

Optimization of Active Current for Large-Scale Wind Turbines Integrated into Weak Grids for Power System Transient Stability Improvement

State Key Laboratory of Advanced Electromagnetic Engineering Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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Academic Editor: Frede Blaabjerg
Received: 20 June 2017 / Revised: 15 July 2017 / Accepted: 26 July 2017 / Published: 31 July 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

Power system transient stability is a challenge when integrating large-scale wind turbines into weak grids. This paper addresses the issue of transient stability in such situations by optimizing a wind turbine’s active current behavior. A wind turbine’s active current reference controller and its setting optimization method are proposed based on analyses of two associated problems: the mechanism for improving transient stability of a single (synchronous) machine infinite bus (SMIB) system, as well as the various physical factor dependencies dictating how active and reactive wind turbine currents affect the swing dynamics of synchronous machines. Analysis of the first problem guided the design of the controller’s main structure. Analysis of the second problem guided selection of the control object within a wind turbine’s active and reactive currents, as well as helped recognition of the influential physical factors that must be considered in the parameter setting process. The efficiency of the controller and the validity of the analyses were verified by case studies using Kundur’s two-area system. View Full-Text
Keywords: power system; transient stability; weak grid; wind turbine power system; transient stability; weak grid; wind turbine
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Zhang, D.; Yuan, X. Optimization of Active Current for Large-Scale Wind Turbines Integrated into Weak Grids for Power System Transient Stability Improvement. Energies 2017, 10, 1108.

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