DC Bias Content Extraction of Power Transformer Under AC and DC Environment and its Suppression Measures

被引：3

作者：

Chen, Zhiwei ^{[1
]}

Chen, Yu ^{[1
]}

Xia, Fei ^{[1
]}

Cheng, Tingli ^{[1
]}

Huang, Shengxin ^{[1
]}

Xiang, Nianwen ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Elect Engn, Hefei 230000, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2024年 / 71卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Bias voltage detection; dc bias; excitation current; transformer; SYSTEM;

D O I：

10.1109/TIE.2023.3303633

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The phenomenon of transformer dc bias (TDB) will saturate the transformer core, resulting in the local overheating, accelerating the ageing of insulating material, and even affecting the transformer safe operation. Therefore, it is of great significance to carry out the TDB detection and suppression. In this article, first, according to the distortion characteristics of the transformer excitation current under TDB. This article presents a method for measuring the bias voltage content of the transformer in the ac/dc environment to detect TDB. Second, the value of TDB is calculated by measuring the voltage difference before and after the dc bias, so as to obtain the degree of TDB. The feasibility of this scheme is verified by multigroup simulations of single-phase transformer (SPT) and three-phase transformer (TPT). Finally, the SPT and TPT simulated experiments of TDB are designed, and one kind of TDB suppression is carried out based on a hybrid transformer model. The experimental results are in good agreement with the simulation results, which can provide certain reference for TDB control in the dc transmission and ac/dc distribution networks.

引用

页码：7853 / 7863

页数：11

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