Transformer Winding Early Fault Protection Based on Circuit-magnetic Leakage Field Multi-state Analytical Model

被引：0
|
作者：
Deng X. [1 ]
Yan K. [1 ]
Zhu H. [1 ]
Zhu H. [1 ]
Zhang Z. [1 ]
Liu S. [3 ]
机构：
[1] School of Electric Power Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai
[2] State Grid Yancheng Power Supply Company, Jiangsu Province, Yancheng
[3] Key Laboratory of Power System Intelligent Dispatch and Control, Shandong University, Shandong Province, Jinan
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 09期
基金：
中国国家自然科学基金;
关键词：
characteristic difference; circuit-magnetic leakage field multi-state analytical model; fault identification; leakage magnetic field;
D O I：
10.13335/j.1000-3673.pst.2022.2015
中图分类号：
学科分类号：
摘要：
Aiming at the ineffective protection of the existing schemes for protecting transformers against the winding deformations, the slight inter-turn faults, and the other early faults, in this study, a new method for the early fault protection of the transformers is proposed based on the leakage magnetic field as the characteristic quantity. According to the structural characteristics of the three-phase three-limb transformers, the leakage magnetic field distribution model is established. Combined with the state space equation of the transformer, a circuit-magnetic leakage field multi-state analytical model that is consistent with the physical transformer is constructed. The difference of the magnetic leakage characteristics between the physical transformer and the electromagnetic-structural coupling model is used to quickly and accurately identify the slight inter-turn fault and the axial winding deformation in complex working conditions without the influence of the inrush current, and the fault location is able to be determined. © 2023 Power System Technology Press. All rights reserved.
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页码：3808 / 3818
页数：10
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