Abstract: Grid connection of small Permanent Magnet Generator (PMG) based wind turbines requires a power conditioning system. This study describes the reliability analysis of system and affecting factors on it. Due to optimize the reliability of system, a power electronic controller is used. The proposed power electronic controller in this study is AC-AC matrix converter and Space Vector Modulation (SVM) controlled technique is used for matrix converter. Comparing proposed method to other methods the advantage of this method is to have the system controlled as well as its main task, i.e., optimize reliability, eliminate open circuit and short circuit errors. The proposed method analyzed using MATLAB simulation.