Use of Modified TVM Parameters for Reliable Estimation of Power Transformer Insulation Condition

被引：0

作者：

Ganguly, Somesh ^{[1
]}

Banerjee, Chandra Madhab ^{[2
]}

Baral, Arijit ^{[1
]}

Chakravorti, Sivaji ^{[3
]}

机构：

[1] IIT ISM Dhanbad, Elect Engn Dept, Dhanbad 826004, India

[2] Med Caps Univ, Elect Engn Dept, Indore 453331, India

[3] Jadavpur Univ, Elect Engn Dept, Kolkata 700032, West Bengal, India

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2023年 / 72卷

关键词：

Condition monitoring; electrometer; feedback ammeter; Kohlrausch-Williams-Watts (KWW) function; time-varying model (TVM); OIL-PAPER INSULATION; POLARIZATION-DEPOLARIZATION CURRENT; DIELECTRIC-SPECTROSCOPY; EFFECTIVE DIAGNOSIS; FREQUENCY-DOMAIN; TIME; SYSTEM; MODEL; MOISTURE; PART;

D O I：

10.1109/TIM.2023.3315359

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A picoammeter or an electrometer is generally used for the measurement of low-amplitude polarization and depolarization current. The available interpretation scheme of time-domain response using time-varying model (TVM) assumes the relaxation process to be purely Debye in nature. Results presented in this article suggest that this leads to inaccurate diagnosis. A modification in the TVM has been proposed to address the issue. The use of the modified TVM also provides a unique insulation model for a particular dielectric response. The modified TVM is subsequently used for estimating insulation condition. The proposed method and the suggested modification in TVM formulation are based on the analysis of data recorded from several real-life transformers. A comparison of the proposed work with that of other available methodologies has been made.

引用

页数：11

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