Topology of DC Circuit Breaker with Pre-current-limiting Capability for DC Grid

被引：0

作者：

Tang S. ^{[1
]}

Jia G. ^{[1
]}

Zhang C. ^{[1
]}

He Z. ^{[2
]}

Chen M. ^{[1
]}

机构：

[1] College of Electrical Engineering, Zhejiang University, Hangzhou

[2] Global Energy Interconnection Research Institute Co., Ltd., Beijing

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 11期

关键词：

DC circuit breaker; DC fault; Fault current limiting; Multi-terminal DC gird;

D O I：

10.7500/AEPS20190730001

中图分类号：

学科分类号：

摘要：

To improve the operation reliability of multi-terminal DC grid with DC faults and reduce the interrupting capability requirements of DC circuit breakers, this paper proposes a topology of DC circuit breaker with pre-current-limiting capability for DC grid. In the proposed topology, the current-limiting circuit can be put into operation in advance when the overcurrent appears in the grid, and it can be decided to interrupt the fault current or recover to normal operation according to the fault detection results. This topology adopts auxiliary capacitor and half-controlling device thyristor to achieve the fast switching of current-limiting inductor and the fast interruption of fault current, which can effectively limit the fault current and has certain economy. To verify the feasibility of the proposed topology in terms of pre-current-limiting and fast interrupting, a simulation model of four-terminal DC grid is built in PSCAD/EMTDC. Simulation results verifies the effectiveness of the proposed topology in limiting fault current and isolating faulty lines. © 2020 Automation of Electric Power Systems Press.

引用

页码：152 / 162

页数：10

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