Stand-alone excitation synchronous wind power generators with power flow management strategy

Tzuen-Lih Chern; Ping-Lung Pan; Yu-Hsiang Chern; Ji-Xian Huang; Jyh-Horng Chou; Whei-Min Lin; Chih-Chiang Cheng

Stand-alone excitation synchronous wind power generators with power flow management strategy

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Author(s): Tzuen-Lih Chern¹ ; Ping-Lung Pan¹ ; Yu-Hsiang Chern² ; Ji-Xian Huang¹ ; Jyh-Horng Chou² ; Whei-Min Lin¹ ; Chih-Chiang Cheng¹
- Affiliations: 1: Department of Electrical Engineering , National Sun Yat-sen University , Kaohsiung , Taiwan ;
  2: Graduate Institute of Electrical Engineering , National Kaohsiung First University of Science and Technology , Kaohsiung , Taiwan
Source: Volume 2014, Issue 9, September 2014, p. 522 – 530
DOI: 10.1049/joe.2014.0217 , Online ISSN 2051-3305

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)

Received 12/08/2014, Accepted 20/08/2014, Revised 13/08/2014, Published 21/08/2014

This study presents a stand-alone excitation synchronous wind power generator (SESWPG) with power flow management strategy (PFMS). The rotor speed of the excitation synchronous generator tracks the utility grid frequency by using servo motor tracking technologies. The automatic voltage regulator governs the exciting current of generator to achieve the control goals of stable voltage. When wind power is less than the needs of the consumptive loading, the proposed PFMS increases motor torque to provide a positive power output for the loads, while keeping the generator speed constant. Conversely, during the periods of wind power greater than output loads, the redundant power of generator production is charged to the battery pack and the motor speed remains constant with very low power consumption. The advantage of the proposed SESWPG is that the generator can directly output stable alternating current (AC) electricity without using additional DC–AC converters. The operation principles with software simulation for the system are described in detail. Experimental results of a laboratory prototype are shown to verify the feasibility of the system.

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