# مقالههای M.R Alizadeh Pahlavani

**توجه:**محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.

##### ۱Voltage Stabilization of VSI SMES Capacitors and Voltage Sag Compensation by SMES Using Novel and Optimized Switching Strategies

اطلاعات انتشار:
بیست و چهارمین کنفرانس بین المللی برق،
سال ۱۳۸۸

تعداد صفحات:
۱۴

This paper presents a novel and optimized switching strategy and control approach for a three–level two–quadrant chopper in a threelevel Neutral point clamped (NPC) voltage source inverter (VSI) superconducting magnetic energy storage (SMES). Using the proposed switching strategy, the voltage of the inverter capacitors in SMES can be independently controlled. Also, the minimum power and switching losses as well as the proper convection can be achieved using this switching strategy. The simulation results indicate that the proposed switching strategy along with a proportional–integral (PI) control approach can be easily implemented in the power networks, and it can balance and stabilize the capacitors’ voltage level of the multi level inverters while satisfying the IEEE standard specifications. To investigate the effectiveness and reliability of the proposed approach in stabilizing the capacitors’ voltage, the performance of SMES using the presented approach is compared with that of SMES when the capacitors of the three–level inverter are replaced with equal and ideal voltage sources. This comparison is carried out from the power quality point of view and is shown that the proposed switching strategy with a PI controller is highly reliable. Considering the fact that the Space Vector Pulse Width Modulation (SVPWM) is highly effective in decreasing the low order harmonics, in this article, this type of modulation combined with the most optimized switching strategy is utilized. In addition, in this study, a new algorithm is presented for SMES to compensate the voltage sag in the power networks. Simulation results show that the VSI SMES combined with the proposed algorithm is able to compensate the voltage sag and phase voltage in less than one cycle.<\div>

##### ۲Comparison between Fuzzy and Adaptive Fuzzy Controllers for Speed Control of BLDC Motors

اطلاعات انتشار:
بیست و ششمین کنفرانس بین المللی برق،
سال ۱۳۹۰

تعداد صفحات:
۸

This study presents the design of an adaptive fuzzy logic controller for the speed control of brushless dc motors. The proposed system uses an adaptation of the slope of the membership functions of the variables used in the conventional fuzzy controller based on the magnitude of the error. A simulation analysis of the fuzzy controller and the adaptive fuzzy controller are done and their performances are compared. The adaptive fuzzy controller is better than the fuzzy controller based on the steady state error and rise time.<\div>

##### ۳Comparison between Fuzzy and PI Controllers Applied to Six Phase Induction Motor

اطلاعات انتشار:
بیست و ششمین کنفرانس بین المللی برق،
سال ۱۳۹۰

تعداد صفحات:
۱۱

This paper presents the design and application of fuzzy logic and PI controls for six phase induction motor (SPIM), at first modeling of SPIM, next two mentioned methods are presented. Then to validate by MATLAB\Simulink these two methods, the speed curve and efficiency diagram are demonstrated.<\div>

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