کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7111982 1460851 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A reliable setting-free technique for power transformer protection based on wavelet transform
ترجمه فارسی عنوان
یک تکنیک مناسب برای تنظیم قدرت ترانسفورماتور بر اساس تبدیل موجک
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
This paper presents a new methodology based on the analysis and monitoring of the discrete wavelet transform (DWT) detail coefficients (DetC) for internal fault conditions identification and discrimination in power transformers. The method extracts the characteristics and calculates the DetC signals levels variation through DWT decomposition for identification of transients. During internal faults the DetC present a sudden and high variation, different from what happens in other transients, allowing their discrimination. The proposed method was able to correctly identify the different types of internal faults in power transformers and additionally transient as inrush currents. The main novelty of the method are: (1) Intelligent data analysis and monitoring, without a threshold adjustment; (2) Fast identification of an internal fault conditions and high coverage of turn-to-turn faults; (3) Secutity during transients such as inrush currents, external faults and overexcitation; (4) Simplicity. The results show that the proposed method has potential for real application in power transformers protection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electric Power Systems Research - Volume 162, September 2018, Pages 161-168
نویسندگان
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