en Electrical Drives Electrical Drives Research Paper Research Paper <div style="text-align: justify;"><span style="color:#000000;"><span style="font-size:12px;"><span style="font-family:tahoma;"><span class="headingsandsub-headingsChar">In this paper, a new sensorless model reference adaptive method is used for direct control of active and reactive power of the doubly fed induction generator (DFIG). In order to estimate the rotor speed, a high frequency signal injection scheme is implemented. In this study, to improve the accuracy of speed estimation, two methods are suggested. First, the coefficients of proportional-integral (PI) blocks are optimized by using Krill Herd algorithm. In the second method, the fuzzy logic control method is applied in the estimator structure instead of PI controllers. The simulation results for the proposed methods illustrate that the estimated speed perfectly matches the actual speed of the DFIG. In addition, the desired slip value is achieved due to the accurate response. On the other hand, the active and reactive power responses have fast dynamics and relatively low oscillations. Moreover, the fuzzy controller shows more robustness against the variations of machine parameters.</span></span></span></span></div> Doubly Fed Induction Generator,Sensorless Control,High Frequency Signal Injection,Fuzzy Logic Control,Krill Herd Optimization Algorithm, 11 21 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-1547-5&slc_lang=en&sid=1 R. Pour Ebrahim roghayeh.poorebrahim@yahoo.com 180031947532846006099 180031947532846006099 No Electrical and Computer Engineering Department, University of Tabriz, Tabriz, Iran. S. Tohidi stohidi@yahoo.com 180031947532846006100 180031947532846006100 Yes Electrical and Computer Engineering Department, University of Tabriz, Tabriz, Iran. A. Younesi ariayounesi@tabrizu.ac.ir 180031947532846006101 180031947532846006101 No Electrical and Computer Engineering Department, University of Tabriz, Tabriz, Iran.