ارائه یک ساختار جدید برای اینورترهای منبع ولتاژ چند سطحی تک فاز بر مبنای کاهش تعداد کلیدهای نیمه‌هادی

نوع مقاله: پژوهشی

نویسنده

دانشکده فنی و مهندسی، واحد تهران مرکزی، دانشگاه آزاد اسلامی، تهران

چکیده

در این مقاله یک توپولوژی جدید برای اینورترهای چند سطحی با استفاده از ماژول‌های چند سطحی و پل اینورتری ارائه شده است. یکی از ویژگی‌های اساسی این توپولوژی کاهش چشمگیر تعداد کلید‌های نیمه‌هادی و منابع تغذیه با افزایش تعداد سطوح ولتاژ خروجی می‌باشد. برای این ساختار آلگوریتمی جهت تعیین اندازه منابع ولتاژهای DC ارائه شده است. همچنین نحوه تعیین تعداد بهینه الما‌‌ن‌های مدار از جمله تعداد کلید‌ها، مدار درایور و منابع تغذیه برای دستیابی به بیشترین سطح ولتاژ در خروجی بدست آمده است. برای توپولوژی پیشنهادی نحوه کلیدزنی و تعیین بازه‌های کلیدزنی به منظور کاهش THD ارائه شده که با استفاده از این روش کلیدزنی، مقدار THD حداقل شده است. جهت ارزیابی و تایید عملکرد توپولوژی پیشنهادی یک نمونه اینورتر با تعداد سطوح 125 سطحی شبیه‌سازی شده است. همچنین برای نشان دادن قابلیت ساختار پیشنهادی یک نمونه شکل موج ولتاژ محتوی هارمونیک‌های مرتبه پنجم و هفتم توسط این ساختار تولید شده و نتایج بدست آمده مورد ارزیابی قرار گرفته است.

کلیدواژه‌ها


عنوان مقاله [English]

A New Topology for Single Phase Voltage Source Multilevel Inverter Based on Reduction of Semiconductor Switches

نویسنده [English]

  • Hassan Feshki Farahani
Azad Eslami Tehran university
چکیده [English]

This paper proposes a new topology for three phase cascaded multilevel converter based on multilevel modules (MLM) and three-phase bridge. The main advantages of the proposed topology, compared to the other topology converter are significantly reduction of the number of power switches and diodes as the number of output voltage levels increases. To achieve the proper levels in the output voltage, an algorithm is introduced to determine the value of DC sources. In the other part of this study, is introduced the determining the minimum values of switches, diode, DC sources, so on to gain the maximum levels at the output voltage. Also, how specifying the switching interval in order to reduce the total harmonic distortion (THD) is proposed that using this switching method, the output voltage THD is minimized. To show the validity of proposed topology, a 125 level three-phase inverter is designed and simulated using PSpice. In addition, to verify the performance of proposed configuration in desired output voltage generation, a sample output voltage containing 3th and 5th harmonic is generated using this topology and the obtained results are evaluated.

کلیدواژه‌ها [English]

  • Multilevel inverters
  • bidirectional switch
  • reduction of switches
  • THD reduction and full-bridge converter

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