بهبود ميرایي نوسانات سيستم قدرت با استفاده از UPFC بهينه‌شده توسط الگوريتم ژنتيک
محورهای موضوعی : مهندسی برق و کامپیوتر
سيدعباس طاهر
1
(دانشگاه كاشان)
رضا همتي
2
(دانشگاه كاشان)
علي عبدالعلي‌پور
3
(دانشگاه كاشان)
کلید واژه: ادوات FACTS UPFCالگوريتم ژنتيکميرایي نوسانات سيستم قدرت,
چکیده مقاله :
در اين مقاله به طراحي کنترل‌کننده ميراساز براي ميرایي نوسانات سيستم قدرت بر مبناي UPFC پرداخته شده است. سيستم تحت مطالعه يک سيستم تک‌ماشينه متصل به شين بينهايت مي‌باشد. ابتدا مدل خطي به‌فرم فضاي حالت براي سيستم تک‌ماشينه متصل به شين بينهايت آورده شده و سپس کنترل‌کننده مذکور با روش بهينه‌سازي الگوريتم ژنتيک براي اين سيستم بهينه‌سازي شده است. تأثير کنترل‌کننده ميراساز بر ميرایي نوسانات سيستم قدرت از طريق شبيه‌سازي غير خطي در حوزه زمان نشان داده شده است. همچنين براي نمايش ويژگي‌هاي کنترل‌کننده طراحي‌شده نتايج اين کنترل‌کننده با يک کنترل‌کننده کلاسيک مقايسه شده که نتايج برتري کنترل‌کننده طراحي‌شده را نسبت به کنترل‌کننده کلاسيک نشان مي‌دهد.
In this paper, the use of the supplementary controller of a Unified Power Flow Controller (UPFC) to improve damping of oscillations in Single Machine Infinite Bus (SMIB) system is investigated. The controller was designed based on a linearized modified Phillips Heffron model of SMIB in state space form. In practice systems use simple Proportional Integral (PI) controllers to control UPFC. However, since the PI control parameters are usually tuned based on classical or trial-and-error approaches, they are incapable of obtaining a good dynamic performance for a wide range of operation conditions. To address this problem, in this research an optimization approach, based on the Genetic Algorithms (GA) method is proposed for the design of UPFC controller (supplementary damping controller) for increasing damping of power system oscillations is developed. Several linear and nonlinear time-domain simulation tests clearly show the effectiveness and validity of the proposed method in enhancing of oscillations257-260damping. Comparisons between the performances of both the proposed and conventional supplementary controllers are made. Computer test results show that proposed method is very effective in oscillations damping and in the meantime is more robust than its conventional counterpart.
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