اینورتر کلید- خازنی هفت‌سطحی سه‌برابرکننده سطح ولتاژ با قابلیت خودمتعادل‌سازی بدون استفاده از سنسور

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان

استادیار، گروه مهندسی برق، دانشگاه فنی و حرفه‌ای، تهران، ایران.

چکیده

این مقاله، به معرفی یک مبدل هفت سطحی تک­فاز پرکاربرد، به‌منظور اتصال منابع تولید انرژی تجدیدپذیر با اندازه ولتاژ کمتر به شبکه‌های قدرت با اندازه‌های بیشتر پرداخته است. افزایش ولتاژ ورودی با ترکیب ولتاژ خازن‌ها در مسیرهای جریان از پیش تعیین‌شده صورت می‌گیرد. تولید شکل موج پلکانی AC خروجی با استفاده از یک منبع ولتاژ DC با کمک روش مدولاسیون تغییر فاز پهنای پالس (PD-PWM) انجام می‌شود. توانایی تعادل ولتاژ خودکار بدون نیاز به کنترل‌کننده یا سنسور خارجی، تعداد کمتر ادوات نیمه‌هادی، بازدهی بالا و سهولت بهره‌برداری از مهم‌ترین ویژگی‌های مبدل پیشنهادی است. قابلیت افزایش ولتاژ ورودی به میزان سه برابر در خروجی افزون بر قابلیت خود متعادل‌سازی ولتاژ خازن‌ها بدون استفاده از مدار کنترلی جانبی یا سنسور از دیگر مزایای ساختار پیشنهادی است. همچنین، با محاسبه تلفات توان و ظرفیت خازن‌های موردنیاز اینورتر پیشنهادی، مقدار بازدهی 8/95 درصد به‌دست آمد. درنهایت، عملکرد اینورتر هفت سطحی پیشنهادی در شرایط مختلف بار در محیط MATLAB SIMULINK شبیه‌سازی و نتایج آن با نتایج به‌دست‌آمده از نمونه اولیه آزمایشگاهی تأیید شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Seven-Level Switched-Capacitor Inverter with Triple Boosting and Sensor-Less Voltage Balancing Capability

نویسندگان [English]

  • Hassan zare
  • Hossein Asgharpour-Alamdari
Assistant Professor, Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran.
چکیده [English]

This paper introduces a versatile single-phase seven-level inverter for integrating lower voltage renewable energy sources to the higher voltage amplitude power grids. The input voltage was increased by combining the voltage of the capacitors in the predetermined current paths. The output staircase waveform was formed by using a DC voltage source, two capacitors, and the aid of the phase disposition pulse width modulation (PD-PWM) strategy. The self-voltage balancing ability of the capacitors without the need for any external controllers nor sensors, high efficiency, and ease of operation were the most important features of the proposed converter. Requiring fewer semiconductor devices compared to other inverters mentioned in recently published papers ensures the superiority of the proposed boosting multilevel inverter. The ability to increase the input voltage by three times at the output in addition to the ability to self-balance the voltage of the capacitors without the use of a side control circuit or sensor were other advantages of the proposed structure. Furthermore, by calculating the power losses and circuit capacitances, 95.8% efficiency was obtained. Finally, the performance of the proposed seven-level inverter under different load conditions was simulated in MATLAB SIMULINK environment and the results were confirmed by the results obtained from the laboratory prototype.

کلیدواژه‌ها [English]

  • Multi
  • Level Inverter (MLI) Switched
  • Capacitor Circuit PD
  • PWM Boosting Ability Self
  • Voltage Balancing Single
  • Source

مراجع

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فصلنامه علمی کارافن
دوره 19، شماره 1 - شماره پیاپی 57
فنی و مهندسی
خرداد 1401
صفحه 383-401

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سابقه مقاله

  • تاریخ دریافت: 06 مرداد 1400
  • تاریخ بازنگری: 04 آبان 1400
  • تاریخ پذیرش: 07 آذر 1400

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