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Open AccessArticle

Inertia Provision and Small Signal Stability Analysis of a Wind-Power Generation System Using Phase-Locked Synchronized Equation

by 1,2,* and 1
1
School of Automation, Wuhan University of Technology, No. 205 Luoshi Rd., Wuhan 430070, China
2
Intelligent Transportation System Program, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(5), 1400; https://doi.org/10.3390/su11051400
Received: 23 January 2019 / Revised: 28 February 2019 / Accepted: 1 March 2019 / Published: 6 March 2019
(This article belongs to the Special Issue Advances in Renewable Energy Technologies for Sustainability)
The inertia and damping of the modern power system are consistently decreased when wind energy has a high penetration level into the grid. This paper proposes a novel solution through transforming the wind turbine generator into an equivalent motion equation mimicking the basic characteristics of the synchronous generator (SG). This synchronized equation builds upon the phase-locked loop (PLL) model of the doubly-fed induction generator (DFIG), which characterizes the inertia constant, damping coefficient, and synchronizing torque. Thanks to this work, the dynamic performance of the inverter-based asynchronous generator could be analyzed from the perspective of the classical rotor motion equation. It further enables us to employ the analogy method to provide the DFIG with automated frequency response ability and to estimate the inertia constant quantitatively. Results also manifest that based on the synchronized equation, the PLL forms a power system stabilizer to enhance the power system oscillation. Hence, parameters tuning in PLL for coordinating inertia provision and damping enhancement are introduced. The contribution of this study lies in that the equivalent synchronized equation is established to optimize the system operation without alterations in the existing control structure of the DFIG. The theoretical analysis and the strategy are verified through the power system simulator. View Full-Text
Keywords: doubly-fed induction generator; phase-locked loop; swing equation; analogy; inertia provision; power system small signal stability; parameter optimization doubly-fed induction generator; phase-locked loop; swing equation; analogy; inertia provision; power system small signal stability; parameter optimization
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MDPI and ACS Style

Wang, Y.; Yuan, Y. Inertia Provision and Small Signal Stability Analysis of a Wind-Power Generation System Using Phase-Locked Synchronized Equation. Sustainability 2019, 11, 1400. https://doi.org/10.3390/su11051400

AMA Style

Wang Y, Yuan Y. Inertia Provision and Small Signal Stability Analysis of a Wind-Power Generation System Using Phase-Locked Synchronized Equation. Sustainability. 2019; 11(5):1400. https://doi.org/10.3390/su11051400

Chicago/Turabian Style

Wang, Yifei; Yuan, Youxin. 2019. "Inertia Provision and Small Signal Stability Analysis of a Wind-Power Generation System Using Phase-Locked Synchronized Equation" Sustainability 11, no. 5: 1400. https://doi.org/10.3390/su11051400

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