Research on the Fault Characteristic of Wind Turbine Generator System Considering the Spatiotemporal Distribution of the Actual Wind Speed

Xiaoling Sheng, Shuting Wan, Kanru Cheng and Xuan Wang
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Xiaoling Sheng: School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Shuting Wan: School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Kanru Cheng: School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Xuan Wang: School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China

Energies, 2020, vol. 13, issue 2, 1-16

Abstract: A reliable fault monitoring system is one of the conditions that must be considered in the design of large wind farms today. The most important factor for the fault monitoring should be the accurate diagnosis criteria with sensitive fault characteristics. Most of the current fault diagnosis criteria are obtained based on the average wind speed at the center of the hub which is not in accord with the actual wind condition in nature. So, this paper utilizes an equivalent wind speed (EWS), which can describe the actual wind speed spatiotemporal distribution on the rotor disk area considering the effects of wind shear and tower shadow, to analyze the common mechanical and electrical faults again. Firstly, the EWS model applicable to the 3-blade wind turbines is introduced; then the new fault characteristics of the wind turbine rotor aerodynamic imbalance and the stator winding asymmetry are theoretically analyzed based on the EWS model; finally, the simulation platform is built in Matlab/Simulink for comparison and the simulation result is well consistent with the theory analysis. The aim of this research is to find more accurate fault characteristics and help promoting the healthy development of wind power industry.

Keywords: wind turbines; equivalent wind speed; rotor aerodynamic imbalance; stator winding asymmetry; fault characteristics (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: 2020
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