Dynamic Low Voltage Ride through Detection and Mitigation in Brushless Doubly Fed Induction Generators

Brushless doubly-fed induction generators have higher reliability, making them an attractive choice for not only offshore applications but also remote locations. These machines are composed of two back-to-back voltage source converters: the grid side converter and rotor converter. The is typically used reactive current control power winding using current. A low ride through (LVRT) fault detected a hysterisis comparison voltage. This approach leads to problems, firstly, use detect faults results in erroneous or slow response, secondly, sub-optimal drop because static reference values compensation. paper solves these problems by analytical model caused short circuit. Moreover, fuzzy logic controller, proposed technique employs frequency addition magnitude LVRT conditions. helps reducing while controller better faster detection faults, leading overall response system. Simulations Matlab/Simulink show that can reduce up 0.12 p.u. result significantly lower transients as compared existing techniques.