Impact of the Converter Control Strategies on the Drive Train of Wind Turbine during Voltage Dips

Energies

Fenglin Miao²  Hongsheng Shi¹  Xiaoqing Zhang² 

[1]National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

关键词: wind turbine;    drive train;    electromechanical model;    voltage dip;    converter control strategies;   

DOI  :  10.3390/en81011452

来源: mdpi

【 摘 要 】

The impact of converter control strategies on the drive train of wind turbines during voltage dips is investigated in this paper using a full electromechanical model. Aerodynamics and tower vibration are taken into consideration by means of a simulation program, named FAST. Detailed gearbox and electrical subsystems are represented in MATLAB. The dynamic response of electromagnetic torque and its impact on the mechanical variables are the concern in this paper and the response of electrical variables is less discussed. From the mechanical aspects, the effect of rising power recovery speed and unsymmetrical voltage dips are analyzed on the basis of the dynamic response of the high-speed shaft (HSS). A comparison of the impact on the drive train is made for two converter control strategies during small voltage dips. Through the analysis of torque, speed and tower vibration, the results indicate that both power recovery speed and the sudden torque sag have a significant impact on drive trains, and the effects depend on the different control strategies. Moreover, resonance might be excited on the drive train by an unbalanced voltage.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.