Longitudinal Travelling Wave Differential Protection for Flexible HVDC System Based on Marti Model

被引：0

作者：

Xue S. ^{[1
]}

Sun Y. ^{[1
]}

Liu B. ^{[1
]}

Lu J. ^{[1
]}

机构：

[1] Key Laboratory of Smart Grid of Ministry of Education (Tianjin University), Nankai District, Tianjin

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 21期

基金：

国家重点研发计划;

关键词：

DC fault; Flexible HVDC; Longitudinal travelling wave differential protection; Marti model; Modular multilevel converter (MMC);

D O I：

10.13334/j.0258-8013.pcsee.182479

中图分类号：

学科分类号：

摘要：

Flexible high voltage direct current (HVDC) transmission system is increasingly applied to new energy grid connection, long-distance, high-capacity power transmission and AC system asynchronous interconnection. Fast and reliable identification of DC fault is a key problem in the development of flexible HVDC system. Based on the traveling wave theory and Marti model, The fault characteristics of modular multilevel converter (MMC) before blocking in DC fault was analyzed quantitatively, and a new principle of longitudinal traveling wave differential protection combined with the speed of traveling wave protection and reliability of longitudinal differential protection was proposed. This principle not only satisfies the fast protection requirements of flexible HVDC system, but also has the advantages of high fault resistance tolerance, strong anti-interference ability and easy to realize. The applicability of the protection principle was verified through large amount of simulation on PSCAD/EMTDC. © 2019 Chin. Soc. for Elec. Eng.

引用

页码：6288 / 6299

页数：11

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