Calculation of DC magnetic flux deviation in the converter-transformer of a self-commutated BTB system during single-line-to-ground faults

被引：16

作者：

Hagiwara, Makoto ^{[1
]}

Pham, Phuong Viet ^{[1
]}

Akagi, Hirofumi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Elect & Elect Engn, Tokyo 1528550, Japan

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2008年 / 23卷 / 02期

关键词：

back-to-back (BTB) system; converter-transformer; dc magnetic flux deviation; multilevel converter; power flow control; single-line-to-ground (SLG) fault;

D O I：

10.1109/TPEL.2007.915611

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：

This paper deals with a 50-MW self-commutated Back-To-Back (BTB) system intended for power-flow control between transmission networks. It focuses on the dynamic behavior of the BTB system during single-line-to-ground (SLG) faults that often result in voltage sags. A non-negligible amount of de magnetic flux deviation appears in the converter-transformers of the BTB system just after the occurrence and restoration of an SLG fault. The dc deviation may bring magnetic flux saturation and an excessive magnetizing current to the transformers. This paper derives theoretical equations related to the dc deviation with reasonable approximation. The theoretical results are confirmed by computer simulation.

引用

页码：698 / 706

页数：9

共 27 条

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