تشخیص و طبقه¬بندی عیوب داخلی ترانسفورماتور¬های قدرت
محورهای موضوعی : علوم زیست محیطیعمار موسوی شکیب 1 , سید مجید کشاورز 2
1 - دانشگاه فنی و حرفه ای پسران یاسوج
2 - دانشگاه فنی و حرفه ای استان یاسوج، ایران،
کلید واژه: ترانسفورماتور, کابل‌های قدرت, ژنراتور,
چکیده مقاله :
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.
The extensive network of the power system has very expensive equipment, including generators, breakers, power cables and transformers. The power transformer is the beating heart of this network, which is always affected by operating and environmental conditions, it suffers various errors, and in some cases, it will cause the transformer to fail and go out of the circuit and not be accessible for a long time. As a result, the maintenance programs should be based on operating and environmental conditions instead of time based, which requires us to be aware of the current equipment conditions. Therefore, it will be very important to use monitoring and error detection methods that have the ability to evaluate the internal conditions of the equipment. There are various methods and tests to evaluate the condition of the transformer, including frequency response analysis, dissolved gas analysis, signal processing, leakage flux, and negative sequence current. Among them, the frequency response analysis method is a very popular and comprehensive method that has a high ability to detect errors and its implementation is simple and convenient.
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