A Hybrid Circuit Breaker Based on Current Commutation Approach for Multi-feeder DC Railway Substations

被引:9
|
作者
Hasan, Saady [1 ]
机构
[1] Helwan Univ, Fac Engn Helwan, Dept Elect Machine & Power Engn, Helwan, Egypt
来源
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS | 2019年 / 5卷 / 02期
关键词
Arc-less circuit breaker operation; fault current limiting and interruption; hybrid DC circuit breaker; railway substation;
D O I
10.17775/CSEEJPES.2017.00290
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The paper presents an economic hybrid circuit breaker for limiting and interrupting the faults in DC railways substations. For fast fault current interruption, the hybrid breaker incorporates high speed mechanical contacts actuated by power semiconductor devices. Additionally, to avoid formation of electric arc, a commutation circuit is used to inject a counter current during fault interruption. In a real railway substation, each feeder is connected to the main DC bus through an expensive air magnetic DC circuit breaker and to an auxiliary DC bus through another expensive breaker. This leads to high cost especially in railway substation with multi feeders which are used to energize the vehicle transmission lines. In this paper, all DC breakers in DC railway substations are replaced by the suggested circuit breaker, which consists of a high speed mechanical contact with two semiconductor devices in each feeder and only one commutation circuit for injecting the counter current in all faulted feeders. The fault diagnosis is designed to detect the abnormal condition (current or voltage) in all feeders and direct the injected current from the commutation circuit to the faulted feeder only when the abnormal reaches a predetermine level. The suggested breaker is able to detect and interrupt any cascading of faults.
引用
收藏
页码:234 / 239
页数:6
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