New Method of Transformer Differential Protection Based on Graph Fourier Transform

被引：1
|
作者：
Xiaojun, Liao [1 ]
Feng, XianZheng [2 ,3 ]
Wang, Xiaoru [1 ]
Li, Zhang [2 ]
机构：
[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu, Sichuan, Peoples R China
[2] Skills Training Ctr State Grid Sichuan Elect Power, Chengdu, Sichuan, Peoples R China
[3] Skills Training Ctr State Grid Sichuan Elect Power, Chengdu 610072, Sichuan, Peoples R China
来源：
ELECTRIC POWER COMPONENTS AND SYSTEMS | 2023年 / 51卷 / 13期
关键词：
transformer differential protection; ratio braking characteristics; current transformer saturation; graph Laplacian spectrum; graph Fourier transform; SATURATION;
D O I：
10.1080/15325008.2023.2192714
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：
In order to enhance the anti-saturation capability of transformer differential protection, a new method based on graph Fourier transform is proposed. First, by analyzing the characteristics of the similarity of the differential protection of the side current and the eigenvector. Secondly, the graph Fourier transform calculates the spectral coefficient for the differential current diagram signal, and constructs the action component and braking component of the differential protection, which can more accurately and effectively identify the faults in the differential protection area, and significantly improves the anti-saturation ability. The dynamic imitation and engineering cases have proved that the new criterion has high sensitivity and maximum TA saturation ability compared to the current mode value and maximum braking methods widely used in the current engineering.
引用
收藏
页码：1251 / 1265
页数：15
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