Design and Performance Analysis of Brushless Doubly-Fed Machine for Wind Power Generation Using AI

In BDFIG whenever an inductive load is suddenly connected or disconnected from the stator power winding(PW), it would leads to large fluctuations at PCC (Point of Common Coupling). So that here we proposed a transient control phenomena of the reactive current by the Line Side Converter (LSC) control. The reactive power change of load leads to the affect of the quality of the voltage waveform at PCC. The LSC cannot work properly, when the amplitude of the PCC voltage is higher than the dc link voltage. Many control strategies such as direct voltage control, predictive control etc., are developed to supply reactive current to overcome this problem in the machine side converter. By supplying or absorbing reactive current the PCC voltage fluctuations are stabilized, this can also be achieved by the LSC. Here we analyzes the PCC voltage and the transient reactive current when is load is suddenly connected or disconnected to the stator power winding and proposed a concept for this control which has better transient state performance. An AI- Fuzzy logic controller is developed in this paper for the better mitigation of distortion. The controllability of the LSC is analyzed whenever voltage swell occurs at PCC, when the load is disconnected from the power winding of the stator. By using reactive current of the LSC, a high voltage ride through concept is proposed and the correctness of this method is discussed by simulation and changes in the output as compared to proposed method is observed in the results..