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Energies 2016, 9(10), 822; doi:10.3390/en9100822

A Vertical-Axis Off-Grid Squirrel-Cage Induction Generator Wind Power System

1
School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
2
KTK Group, Changzhou 212102, China
3
College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
4
Jiangsu Province Special Equipment Safety Supervision Inspection Institute-Branch, Wuxi 214171, China
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 16 August 2016 / Revised: 3 October 2016 / Accepted: 9 October 2016 / Published: 14 October 2016
(This article belongs to the Collection Wind Turbines)
View Full-Text   |   Download PDF [5086 KB, uploaded 14 October 2016]   |  

Abstract

In order to broaden the limited utilization range of wind power and improve the charging and discharging control performance of the storage battery in traditional small wind power generation systems, a wind power system based on a vertical-axis off-grid induction generator is proposed in this paper. The induction generator not only can run in a wide wind speed range but can also assist the vertical-axis wind turbine to realize self-starting at low wind speed. Combined with the maximum power point tracking method, the slip frequency control strategy is employed to regulate the pulse width modulation (PWM) converter to control the output power of the proposed system when the wind speed and load change. The charge and discharge of the storage battery is realized by the segmented current-limiting control strategy by means of an electric power unloader device connected to the DC bus. All these implement a balanced and stable operation of the proposed power generation system. The experimental research on the 5.5 kW prototype system is developed, and the corresponding results verify the correctness and feasibility of the system design and control strategy. Some comparison experiments with a magnetic suspension permanent magnet synchronous generator (PMSG) demonstrate the application prospect of the proposed vertical-axis off-grid induction generator wind power system. View Full-Text
Keywords: induction generator; wind power generation system; vertical axis; off grid; slip frequency control; segmented current-limiting control induction generator; wind power generation system; vertical axis; off grid; slip frequency control; segmented current-limiting control
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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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MDPI and ACS Style

Xu, P.; Shi, K.; Bu, F.; Zhao, D.; Fang, Z.; Liu, R.; Zhu, Y. A Vertical-Axis Off-Grid Squirrel-Cage Induction Generator Wind Power System. Energies 2016, 9, 822.

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