Sensorless twelve sectors implementation of neural DPC controlled DFIG for reactive and active powers ripples reduction

A direct power control (DPC) drive allows independent and direct command of reactive power linkage and stator active power by the selection of optimum inverter switching tables (STs) of an induction generator (IG). There is no need for any complex conversion of voltage or current. However, each vector selected from the ST can not produce the required accurate voltage vector to provide the desired active and reactive powers. This results in the production of ripples in the reactive power as well as active power waveforms. In this study, we propose a technique to minimize active and reactive powers fluctuations. In this proposed strategies, the circular flux vector is divided into 12 sectors of 30 degrees and is compared to each other. Switching table is based on neural networks controller. The proposed strategies of 12 sectors DPC strategy are simulated and the comparison of their performances is presented.