کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
727779 892803 2010 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Importance of denoising in dielectric response measurements of transformer insulation: An uncertainty analysis based approach
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Importance of denoising in dielectric response measurements of transformer insulation: An uncertainty analysis based approach
چکیده انگلیسی

In Data Acquisition denoising is an important issue. In the present work, importance of denoising in the case of real-time data acquisition for transformer condition monitoring using dielectric response measurements in time domain has been studied using uncertainty analysis approach. The uncertainty analysis of the recorded data is also very important for proper decision making in dielectric response analysis of transformers. Detailed descriptions of the real-time dielectric response measurement system (namely, Polarization–Depolarization current and Recovery Voltage measurements) as well as real-life experimentations are given. The paper establishes the fact that the uncertainty due to the noise is more significant than the traditional expanded uncertainty of the data acquisition setup. Experimental results and comparisons of performances of different filtering schemes show that a hybrid-filtering technique could reduce the uncertainty in the acquired data efficiently. A parameter called Uncertainty Envelope is observed to establish this fact. The procedure to calculate the uncertainty envelope for the data corrupted with non-stationary noise and also its importance are explained in detail. Results also show that without denoising and uncertainty analysis of the data one may arrive into a wrong interpretation about the insulation condition in dielectric response analysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 43, Issue 1, January 2010, Pages 54–66
نویسندگان
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