یک روش تطبیقی برای کاهش ولتاژ توالی منفی و جبران‌سازی عدم تعادل ولتاژ در ریزشبکه‌های جزیره‌ای
رضا غنی زاده
1
(
گروه برق، واحد ارومیه، دانشگاه آزاد اسلامی، ارومیه، ايران
)
کلید واژه: ریزشبکه, منابع تولید پراکنده, عدم تعادل ولتاژ, ولتاژ توالی منفی, کنترل کننده مرکزی,
چکیده مقاله :
عدم تعادل ولتاژ در ریزشبکه‌ها باعث بروز مشکلاتی نظیر افزایش بیش از حد دما، کاهش بهره‌وری و کاهش عمر مفید تجهیزات و دستگاه‌های مصرف‌کنندگان می‌شود. در این مقاله، یک روش کنترلی نوین برای جبران‌سازی عدم تعادل ولتاژ در ریزشبکه‌های جزیره‌ای ارائه شده است. این روش با تخمین تطبیقی افت ولتاژ توالی منفی در امپدانس فیدر هر فاز، مرجع ولتاژ واحدهای تولید پراکنده (DG) را تنظیم کرده و با کاهش ولتاژ توالی منفی، جبران مؤثر عدم تعادل ولتاژ در ریزشبکه را امکان‌پذیر می‌سازد. برخلاف روش‌های پیشین، این رویکرد نیازمند کنترل‌کننده مرکزی اختصاصی نبوده و تنها به ارتباطات با پهنای باند پایین (LBC) بین DGهای همسایه نیاز دارد. علاوه بر این، این روش به اطلاعات دقیق مربوط به امپدانس فیدر خروجیDGها نیز نیازی ندارد. فرآیند تعیین و طراحی پارامترهای سیستم کنترل به‌طور کامل تشریح شده است و برای ارزیابی کارایی روش پیشنهادی، شبیه‌سازی بر روی یک سیستم نمونه با استفاده از نرم‌افزارMATLAB/Simulink انجام شده است. نتایج شبیه‌سازی نشان می‌دهد که این روش می‌تواند به‌عنوان یک راهکار مؤثر و کارآمد برای جبران‌سازی عدم تعادل ولتاژ در ریزشبکه‌های جزیره‌ای به کار گرفته شود.
چکیده انگلیسی :
The voltage imbalance in microgrids leads to issues such as excessive temperature rise, reduced efficiency, and shortened lifespan of equipment and consumer devices. In this paper, a novel control method for compensating unbalance voltage in islanded microgrids is presented. This method adjusts the voltage reference of Distributed Generation (DG) units by adaptively estimating the negative sequence voltage drop across the feeder impedance of each phase, enabling effective compensation of voltage imbalance in the microgrid by reducing the negative sequence voltage. Unlike previous methods, this approach does not require a dedicated central controller and only relies on low-bandwidth communication (LBC) between neighboring DGs. Additionally, the method does not require precise information regarding the feeder impedance of the DGs' output. The process of determining and designing the control system parameters is fully explained, and to assess the performance of the proposed method, simulations are conducted on a test system using MATLAB/Simulink software. The simulation results demonstrate that this method can be an effective and efficient solution for compensating voltage imbalance in islanded microgrids
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