تشخیص و طبقه¬بندی عیوب داخلی ترانسفورماتور¬های قدرت
الموضوعات :
عمار موسوی شکیب
1
(دانشگاه فنی و حرفه ای پسران یاسوج)
سید مجید کشاورز
2
(دانشگاه فنی و حرفه ای استان یاسوج، ایران، )
الکلمات المفتاحية: ترانسفورماتور, کابل‌های قدرت, ژنراتور,
ملخص المقالة :
شبکه گسترده سیستم قدرت دارای تجهیزات بسیار گران‌قیمتی می باشد که ازجمله آن می توان به ژنراتور، بریکر، کابل های قدرت و ترانسفورماتور اشاره کرد. ترانسفورماتور قدرت به‌عنوان قلب تپنده این شبکه بوده که همواره تحت تأثیر شرایط بهره برداری و محیطی، دچار خطاهای مختلفی شده و در برخی موارد سبب خرابی و خروج از مدار ترانسفورماتور و عدم دسترسی طولانی‌مدت خواهد شد. درنتیجه برنامه‌های تعمیر و نگهداری باید به‌جای مبتنی بر زمان، مبتنی بر شرایط بهره‌برداری و محيطي گردند که این مسئله خود مستلزم آن می باشد که از شرایط حال تجهیز نيز آگاه باشیم. لذا استفاده از روش های نظارت و تشخیص خطا که توانایی ارزیابی شرایط داخلی تجهیزات رادارند، بسیار بااهمیت خواهد بود. روش ها و تست های مختلفی به‌منظور ارزیابی شرایط ترانسفورماتور وجود دارد که از آن جمله می توان به روش هایی مانند تحلیل پاسخ فرکانسی ، آنالیز گازهای محلول ، پردازش سیگنال ، شار نشتی و جریان توالی منفی ... نام برد. از بین آن ها، روش تحلیل پاسخ فرکانسی روشی بسیار محبوب، فراگیر بوده که قابلیت بالایی در تشخیص خطا ها داشته و پیاده-سازی آن ساده و راحت می باشد.
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