اینورتر رابط شبکه فتوولتائیک، با قابلیت متعادل‌سازی توان اکتیو و راکتیو بار در شبکه توزیع سه‌فاز چهارسیمه

نویسندگان

دانشکده مهندسی برق و کامپیوتر - دانشگاه بیرجند

چکیده

متعادل‌سازی بار از موضوعات مهم در سیستم‌های توزیع است. از طرفی امروزه استفاده از منابع تولید پراکنده نظیر فتوولتائیک برای تولید انرژی رو به افزایش است. در این مقاله، اینورتر رابط شبکه فتوولتائیک، با توانایی متعادل‌سازی توان اکتیو و راکتیو بار در شبکه توزیع سه‌فاز چهارسیمه پیشنهاد می‌شود. استراتژی کنترل پیشنهادی برمبنای ارائه روش مؤلفه‌های اکتیو و راکتیو لحظه‌ای جریان در سیستم‌های تک فاز با قاب مرجع متغیر متناسب با ولتاژهای شبکه است. دو مبدل DC/DC و DC/AC برای اتصال فتوولتائیک به شبکه استفاده می‌شود. مبدل DC/DC وظیفه ردیابی حداکثر توان فتوولتائیک و مبدل DC/AC وظیفه متعادل‌سازی توان اکتیو و راکتیو بار و تزریق حداکثر توان فتوولتائیک به شبکه را برعهده دارد. با به‌کارگیری ساختار مبدل 3H-bridge برای اینورتر رابط شبکه، امکان رسیدن به اهداف کنترلی در شبکه‌های توزیع سه‌فاز چهارسیمه با ولتاژ پایین فراهم شده‌است. نتایج شبیه‌سازی در نرم‌افزار MATLAB/SIMULINK برای یک سیستم توزیع سه‌فاز چهارسیمه، توانایی استراتژی کنترلی پیشنهادی را در رسیدن به اهداف کنترلی نشان می‌دهد.

کلیدواژه‌ها

عنوان مقاله [English]

Compensation of load active and reactive power Imbalance by a photovoltaic grid interface inverter for three-phase four-wire distribution networks

نویسندگان [English]

  • H. Afkar
  • M. A. Shamsınejad
  • M. Ebadian
Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran
چکیده [English]

Load balancing is an important issue in distributed systems. In addition, using distributed generation sources such as photovoltaic is increasing. This paper presents a photovoltaic grid interface inverter with compensation of load active and reactive power Imbalance for three-phase four-wire distribution networks. An improved control strategy based on instantaneous active and reactive current component method with variable reference frame in single-phase systems is proposed. Two DC/DC and DC/AC converters have been utilized for connecting PV to the grid. DC/DC converter is responsible for maximum power point tracking (MPPT) and DC/AC converter is responsible for injecting power to the grid as well as balancing load. Using the structure of 3H-bridge converter for grid interface inverter, it is possible to achieve control objectives in three-phase four-wire low voltage distribution networks is provided. The proposed control has been verified by simulation using MATLAB/SIMULINK software and the simulation results indicate the ability of the proposed method to achieve control objectives.

کلیدواژه‌ها [English]

  • Photovoltaic grid interface inverter
  • compensation
  • load active and reactive power Imbalance
  • three-phase four-wire distribution networks

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