On-load tap-changer influence on frequency response analysis of transformer: A case study

2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED) Pub Date : 2017-08-01 DOI:10.1109/DEMPED.2017.8062394

M. Bagheri, S. Nezhivenko, B. Phung, V. Behjat

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引用次数: 3

Abstract

Frequency Response Analysis (FRA) has been used as a comparative diagnosis method to explore mechanical defects in transformer. FRA is quite sensitive method and it can be influenced by different factors in transformer simply; however, this sensitivity will make it superior rather than other transformer winding deformation diagnosis techniques. This study has concentrated on tap-changer position influence on FRA signature. Practical study is performed on a 33 kV, 40 MVA three-phase core type transformer to examine on-load tap-changer (OLTC) position on frequency response spectrum in different frequency bands in Bode diagram. Oscillations in different frequency bands are discussed and their fluctuations are interpreted. Low-frequency band oscillations of FRA spectrum due to tap position changes are analyzed and discussed in detail. Distinguishing the tap-changer influence on FRA spectrum from winding deformation is quite crucial for FRA data interpretation.

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有载分接开关对变压器频响分析的影响:一个实例研究

频率响应分析(FRA)作为一种比较诊断方法被用于变压器机械缺陷的研究。FRA是一种灵敏度很高的方法，对变压器中各种因素的影响都很简单;然而，这种灵敏度将使其优于其他变压器绕组变形诊断技术。本文主要研究分接开关位置对FRA信号的影响。在33kv、40mva三相铁心型变压器上进行了实际研究，考察了有载分接开关(OLTC)在波德图中不同频段频率响应谱上的位置。讨论了不同频带的振荡，并解释了它们的波动。详细分析和讨论了抽头位置变化引起的FRA频谱低频振荡。区分分接开关对FRA频谱的影响和绕组变形对FRA数据解释至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED)

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