Control Strategy for DFIG Wind Turbine toEnhance LVRT under Various Faults

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering

article

Gayathri.S.Nair¹  Krishnakumari.T¹ 

[1] Dept. of EEE, ASIET Kalady, Mahatma Gandhi University

关键词: Doubly fed induction generator;    low voltage ride through capability;    symmetrical and unsymmetrical fault;    wind turbine;    series dynamic resistor;    pitch control;    crowbar;    active crowbar;    demagnetising current injection.;   

来源: Research & Reviews

【 摘 要 】

This paper presents a new control method for both the rotor and grid side converters to enhance the low-voltage ride-through (LVRT) capacity of the DFIG WT. By providing suitable control for RSC and GSC converter switching circuit, the parameters voltage, current, real and reactive power, DC link voltage, rotor speed are controlled. In addition to this the pitch control is also provided. With the aid of the grid side control scheme the DClink voltage fluctuation can been effectively reduced. The new control method for the grid side controller can effectively reduce the high transients that may occur during the faults. This new control can enable both active and reactive supports to the faulted grids from WT which is difficult for the crowbar based control. The new method is found to be very effective in achieving LVRT capacity during symmetrical and unsymmetrical fault.

【 授权许可】

Unknown