An Improved Adaptive-Torque-Gain MPPT Control for Direct-Driven PMSG Wind Turbines Considering Wind Farm Turbulences

Xiaolian Zhang, Can Huang, Sipeng Hao, Fan Chen and Jingjing Zhai
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Xiaolian Zhang: School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Can Huang: Department of Electrical Engineering and Computer Science, The University of Tennessee, Knoxville, TN 37996, USA
Sipeng Hao: School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Fan Chen: School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Jingjing Zhai: School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China

Energies, 2016, vol. 9, issue 11, 1-16

Abstract: Maximum power point tracking (MPPT) plays an important role in increasing the efficiency of a wind energy conversion system (WECS). In this paper, three conventional MPPT methods are reviewed: power signal feedback (PSF) control, decreased torque gain (DTG) control, and adaptive torque gain (ATG) control, and their potential challenges are investigated. It is found out that the conventional MPPT method ignores the effect of wind turbine inertia and wind speed fluctuations, which lowers WECS efficiency. Accordingly, an improved adaptive torque gain (IATG) method is proposed, which customizes adaptive torque gains and enhances MPPT performances. Specifically, the IATG control considers wind farm turbulences and works out the relationship between the optimal torque gains and the wind speed characteristics, which has not been reported in the literature. The IATG control is promising, especially under the ongoing trend of building wind farms with large-scale wind turbines and at low and medium wind speed sites.

Keywords: wind energy conversion system (WECS); wind turbine; maximum power point tracking (MPPT); adaptive torque gain control; turbulence intensity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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