کنترل هوشمند سیستم جبران‌کننده استاتیکی فتوولتائیک بر پایه منطق فازی به‌منظور بهبود پایداری ولتاژ
محورهای موضوعی : انرژی های تجدیدپذیر
علی دلیریان
1
,
علیرضا صولت
2
,
سید محمد جواد رستگار فاطمی
3
1 - گروه مهندسي برق، دانشکده مهندسي برق، واحد ساوه، دانشگاه آزاد اسلامی، ساوه، ایران
2 - گروه مهندسي برق، دانشکده مهندسي برق، واحد ساوه، دانشگاه آزاد اسلامی، ساوه، ایران
3 - گروه مهندسي برق، دانشکده مهندسي برق، واحد ساوه، دانشگاه آزاد اسلامی، ساوه، ایران
کلید واژه: پایداری ولتاژ, سیستم فتوولتائیک, کنترل هوشمند, حالت جبران‌کننده استاتیکی,
چکیده مقاله :
این مقاله یک کنترل فازی جدید برای سیستم فتوولتائیک مبتنی بر جبران کننده سنکرون استاتیکی (PVSTATCOM) به منظور بهبود پایداری ولتاژ پیشنهاد می‌کند. سیستم پیشنهادی وظیفه کنترل ولتاژ دینامیکی سیستم خورشیدی PV متصل شده به باس بار را در حالت های عملیاتی مختلف به عنوان STATCOM و/یا تولید توان اکتیو PV بر عهده دارد. در این استراتژی، هنگام بروز اختلال، کنترل کننده فازی پیشنهادی با تشخیص آن و با توجه به شدت اغتشاش، در صورت عدم وجود یا ناکافی بودن ظرفیت باقیمانده اینورتر برای جبران سازی توان راکتیو، تولید توان اکتیو سیستم خورشیدی را متوقف می‌کند و از اینورتر آن به طور کامل به عنوان STATCOM، برای تنظیم ولتاژ در باس بار، استفاده می‌کند. پس از رفع اختلال، سیستم به حالت تولید توان اکتیو مانند قبل از اختلال باز می‌گردد. برای ارزیابی عملکرد کنترل‌کننده فازی پیشنهادی، حالت‌های مختلفی با نرم افزار EMTDC/PSCAD شبیه‌سازی شده‌اند تا توانایی کنترل‌کننده برای بهبود پایداری سیستم قدرت را به اثبات برسانند. نتایج تأیید می‌کند که PV- STATCOM با کنترل کننده پیشنهادی می‌تواند عملکرد دینامیکی سیستم را بهبود بخشد.
This paper proposes a new fuzzy control for photovoltaic static compensator (PV-STATCOM) system in order to improve voltage stability. The task of proposed system is the dynamic voltage control of a solar PV system connected to load bus in different operating modes as STATCOM and/or PV active power generation. In this strategy, in case of perturbation, the proposed fuzzy controller by detecting it and considering the severity of disturbance, when there is no or insufficient remaining capacity of the inverter to compensate the reactive power, stops the active power production of the PV solar system, and then the entire capacity of the inverter is used as a STATCOM to regulate the voltage at the load bus. Then, after fixing the problem, the system returns to the active power generation mode as before. To evaluate the performance of the proposed fuzzy controller, different modes are simulated with EMTDC/PSCAD software to prove the ability of the controller to improve the stability of the power system. The results confirm that the PV-STATCOM with the proposed controller can improve the dynamic performance of the system.
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