Search Coil Based Online Diagnostics of Transformer Internal Faults

被引：28

作者：

Venikar, Prasad Arvind ^{[1
]}

Ballal, Makarand Sudhakar ^{[1
]}

Umre, Bhimrao Sitaram ^{[1
]}

Suryawanshi, Hiralal Murlidhar ^{[1
]}

机构：

[1] Visvesvaraya Natl Inst Technol, Dept Elect Engn, Nagpur 440010, Maharashtra, India

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2017年 / 32卷 / 06期

关键词：

Interturn fault; search coil; transformer internal faults; winding radial displacement; 3-PHASE POWER TRANSFORMERS; FREQUENCY-DOMAIN DETECTION; TURN FAULT; INTERTURN FAULT; WINDING FAULTS; PROTECTION; MACHINES; LOCATION;

D O I：

10.1109/TPWRD.2017.2682083

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：

An online approach based on application of search coil for transformer winding fault detection is presented in this paper. Earlier attempts report use of search coil for the detection of transformer interturn fault. This paper extends application of search coil for detection of winding displacement in addition to interturn fault identification. Experimental results based on specially designed 10-kVA transformer are presented to analyze search coil voltages during healthy and faulty conditions. The algorithm detects phase (U, V, W), side (LV, HV), and precise location of the fault. Discrimination between interturn fault and winding radial displacement is also achieved by search coil voltage analysis. The results are experimentally verified based on impedance analyzer plots. Experimental analysis indicates that the proposed method is independent of load on the transformer, vector group, nature of winding, balanced or unbalanced source voltage, source voltage harmonics, inrush, and overexcitation conditions.

引用

页码：2520 / 2529

页数：10

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