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Energies 2018, 11(1), 103; https://doi.org/10.3390/en11010103

Coordinated Control Schemes of Super-Capacitor and Kinetic Energy of DFIG for System Frequency Support

1
School of Automation, Nanjing Institute of Technology, Nanjing 211167, China
2
School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3
School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
4
School of Electric Power, South China University of Technology, Guangzhou 510006, China
5
Guangdong Key Laboratory of Clean Energy Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
Received: 19 November 2017 / Revised: 21 December 2017 / Accepted: 22 December 2017 / Published: 3 January 2018
(This article belongs to the Section Electrical Power and Energy System)
View Full-Text   |   Download PDF [2145 KB, uploaded 3 January 2018]   |  

Abstract

This paper mainly focuses on how to provide frequency supports by the doubly fed induction generator (DFIG) during system disturbances. Two coordinated controls that enable system frequency supports by DFIG-based wind turbines (WTs) are proposed in this paper. The first control scheme seeks to render system support via simultaneously utilizing the energy from the installed super-capacitor between the back-to-back converter of DFIG, and WT rotational kinetic energy (KE). The second one stabilizes system frequency by firstly exerting the installed super-capacitor energy and then WT rotational KE via a unique cascading control. Both proposed coordinated control schemes jointly utilize two virtual inertia sources, namely super-capacitor in the DFIG and rotor rotational mass in the WT to fast provide system frequency support. However, the second proposed one stands itself out by reducing its impaired impacts on the overall wind energy production. Two proposed controls on rapidly providing frequency support are effectively verified and compared in detail by different system disturbances in the DIgSILENT/Powerfactory software. View Full-Text
Keywords: system inertia support; kinetic energy (KE); doubly fed induction generator (DFIG); cascading control; frequency regulation system inertia support; kinetic energy (KE); doubly fed induction generator (DFIG); cascading control; frequency regulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Xiong, L.; Li, Y.; Zhu, Y.; Yang, P.; Xu, Z. Coordinated Control Schemes of Super-Capacitor and Kinetic Energy of DFIG for System Frequency Support. Energies 2018, 11, 103.

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