Differential protection for special industrial transformers

被引：9

作者：

Gajic, Zoran

机构：

[1] ABB Power Technologies AB, Substation Automation

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2007年 / 22卷 / 04期

关键词：

converter transformers; power transformers; power transformer protection; protective relaying;

D O I：

10.1109/TPWRD.2007.905561

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：

Power transformer differential protection has been used for decades on standard three-phase power transformers. However, special industrial transformers, such as 24-pulse converter transformers, could not typically be protected easily with the standard power transformer differential relays. The main reason is the nonstandard phase angle shift of 24-pulse converter transformers. Such 24-pulse converter transformers are often used in industrial and railway applications. This paper will show that it is possible to provide differential protection for such special transformers by using standard numerical transformer differential protection relays and external interposing current transformers (CTs). However, the external interposing CTs can be designed in a standardized way. This approach will significantly simplify the application of differential protection for special industrial transformers.

引用

页码：2126 / 2131

页数：6