يک روش ترکيبي جديد برای تخمين پديده‌هاي کيفيت توان به‌صورت تفکيک‌شده با استفاده از شبکه عصبی وفقی
محورهای موضوعی : مهندسی برق و کامپیوترحميدرضا محمدی 1 , علی یزدیان ورجانی 2 , حسین مختاری 3
1 - دانشگاه برق و کامپيوتر
2 - دانشگاه تربیت مدرس
3 - دانشگاه صنعتی شریف
کلید واژه: تخمين پديده‌های کيفيت توانجبران‌سازی انتخابیجبران‌ساز يکپارچه کيفيت تواننرون خطی وفقی,
چکیده مقاله :
با توجه به گسترش روزافزون پديده‌هاي کيفيت توان و همچنين گسترش دامنه کاربرد تجهيزات حساس به اين پديده‌ها، ضرورت جبران پديده‌هاي کيفيت توان امري اجتناب‌ناپذير است. با استفاده از تجهيزات جبران‌سازی سری، موازي و يکپارچه مي‌توان به‌طور هم‌زمان اغتشاشات ولتاژ، جريان و يا هر دو را جبران نمود. يکي از مهم‌ترين مراحل در جبران‌سازی دقيق و بهينه پديده‌های کيفيت توان، تخمين سريع و دقيق آنها به‌صورت تفکيک‌شده و مجزا از هم مي‌باشد. در اين مقاله يک روش ترکيبي جديد، مبتنی بر استفاده از يک تخمين‌گر يکپارچه وفقی، ارائه شده است که قادر به شناسايي و تخمين سريع و دقيق پديده‌هاي کيفيت توان به‌صورت تفکيک‌شده و مجزا مي‌باشد. اين روش در مقايسه با روش‌های متداول ضمن کاهش حجم محاسبات از مزايايي همچون محاسبات ساده و سريع برخوردار است. لذا استفاده از اين روش در کاربردهاي زمان واقعی همچون جبران‌سازی انتخابی پديده‌های کيفيت توان توسط فيلتر اکتيو سری، فيلتر اکتيو موازی و جبران‌ساز يکپارچه کيفيت توان، بسيار مناسب خواهد بود. با استفاده از نتايج شبيه‌سازي در شرايط گذرا و ماندگار، کارايي روش ارائه‌شده نشان داده خواهد شد.
With respect to increment of power quality problems and also increasing application of sensitive devices to such problems, the power quality enhancement becomes a serious concern. The series-shunt and combined compensators can be used for compensation of voltage, current, or both voltage and current. One of the most important stages for precise and optimized compensation of power quality parameters is the fast and accurate estimation of individual parameters. In this paper, a new combined strategy based on a unified adaptive estimator is proposed which is capable of detection and accurate estimation of individual power quality parameters. In comparison to other estimation methods, the proposed method has a simple structure, low computation, high precision and is capable of individual power quality parameters estimation. Therefore, the proposed method can be used for on-line application such as selective compensation in series, shunt active power filters, and unified power quality conditioner. The exclusive properties of the proposed strategy will be shown by simulation results in transient and steady state conditions.
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