Discrimination between fault and magnetizing inrush current in transformers using short-time correlation transform

被引：33

作者：

Zhang, H ^{[1
]}

Wen, JF ^{[1
]}

Liu, P ^{[1
]}

Malik, OP ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Elect & Power Engn, Wuhan 430074, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS | 2002年 / 24卷 / 07期

关键词：

power transformer protection; short-time correlation transform (STCT); CT saturation; dead angle;

D O I：

10.1016/S0142-0615(01)00065-5

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 new method to discriminate between internal fault current and inrush current is presented in this paper, A short time correlation function is used to extract the dead angle from the differential current. The effect of CT saturation on inrush current is considered and test results with the data obtained from a prototype device on a dynamic power system model verify the effectiveness of the proposed scheme. Another advantage of this algorithm is that it has very small computation requirement. Thus can be applied for real-time applications. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：557 / 562

页数：6

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