A Saturation Suppression Approach for the Current Transformer-Part I: Fundamental Concepts and Design

被引：27

作者：

Davarpanah, Mahdi ^{[1
]}

Sanaye-Pasand, Majid ^{[1
,2
]}

Iravani, Reza ^{[3
]}

机构：

[1] Univ Tehran, Elect & Comp Engn Sch, Coll Engn, Tehran 14395515, Iran

[2] Univ Tehran, Control & Intelligent Proc Ctr Excellence, Elect & Comp Engn Sch, Tehran, Iran

[3] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2013年 / 28卷 / 03期

关键词：

Current transformer (CT); CT desaturation; CT saturation prevention; electronic switch; COMPENSATION; ALGORITHM;

D O I：

10.1109/TPWRD.2013.2253496

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：

The current transformer (CT) is prone to the magnetic core saturation during the power system faults. The CT saturation can prolong and/or miscoordinate operation of relays and thus may result in the system stability problems and equipment damage. This paper proposes a new hardware-based method to suppress or prevent the CT saturation. The proposed approach is based on adding a controllable resistor at the CT secondary circuit which dynamically generates a flux to oppose the time varying flux associated with the decaying dc component of the fault current. Part I of this two-part paper presents the concept, the controllable-switch operational strategy, the design steps, and the parameters of the controllable resistor. Part II provides a comprehensive evaluation of the controllable resistor based on offline digital time-domain simulation and control-hardware-in-the-loop studies.

引用

页码：1928 / 1935

页数：8