Design and Simulation of Breaking Time Sequence for DC Circuit Breaker with a Current-Limiting Inductance

2014 ◽  
Vol 556-562 ◽  
pp. 1959-1963
Author(s):  
Si Ming Wei ◽  
Yi Gong Zhang ◽  
Huan Liu ◽  
Zhi Qiang Dai ◽  
Xiao Du
Keyword(s):  
Design Method ◽  
Circuit Breaker ◽  
Time Sequence ◽  
Fault Current ◽  
Distribution Grid ◽  
Current Limiting ◽  
Selection Principles ◽  
Dc Circuit Breaker ◽  
Breaking Time ◽  
A Current

It is great significance for development of MTDC (Multi-terminal HVDC) to build DC transmission and distribution grids. However, the relatively low impedance in DC grids makes the fault penetration much faster and deeper .Consequently, fast and reliable DC circuit breaker is needed to isolate faults. Breaking time and other parameters are important for a breaker to achieve its goals. This paper presents a DC circuit breaker with a current-limiting inductance and gets the rising and falling characteristics of fault current. Based on the characteristics, a design method of breaking time sequence will be given, as well as the calculation of current-limiting inductance and the selection principles of arresters. A 10kV DC distribution grid is modeled and simulated by PSCAD/EMTDC to verify that the method can meet the requirements of breaking fault current quickly and reliably.

scholarly journals Impact on Current-Interrupting Characteristic by Parameter Settings of Superconducting Hybrid DC Circuit Breaker

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2469
Author(s):  
Sang-Jae Choi ◽  
Sung-Hun Lim
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Case Method ◽  
Power Semiconductors ◽  
Dc System ◽  
Current Limiting ◽  
Dc Circuit Breaker ◽  
Multiple Power ◽  
Short Time ◽  
A Current

DC faults cause severe disruption in not only the DC system but also the AC system because the fault current is very large and rapidly increases. The DC circuit breaker used to separate the DC faults from the power system is still being researched, but it is very expensive due to the use of multiple power semiconductors to interrupt a large fault current in a short time. However, if the quench characteristic of a superconductor is used, the amplitude of fault current can be reduced. Therefore, it is possible to effectively interrupt a large fault current even if a relatively cheap mechanically passive DC circuit breaker is used. In the current study, a superconducting hybrid DC circuit breaker is proposed, and the limiting characteristics of each element are analyzed. By using two superconducting elements, the quench occurs sequentially twice according to the magnitude of the fault current, and the current-limiting reactor and resistance are used. If a current-limiting reactor is used in the DC system, the fault current rises slowly at the beginning of the fault, and the use of resistance can reduce the magnitude of the fault current. The inductance of the current-limiting reactor and resistance parameter settings of the hybrid DC circuit breaker was analyzed by the step-changing case method, and the interrupting characteristic of the DC circuit breaker was improved.

scholarly journals Improvement of DC Fault Current Limiting and Interrupting Operation of Hybrid DC Circuit Breaker Using Double Quench

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4157
Author(s):  
Sang-Jae Choi ◽  
Jun-Hyup Lee ◽  
Jin-Wook Lee ◽  
Sung-Hun Lim
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Power Electronic ◽  
Series Resonance ◽  
Dc Fault ◽  
Operational Characteristics ◽  
Current Limiting ◽  
Effective Operation ◽  
Dc Circuit Breaker ◽  
Circuit Power

In this paper, direct current (DC) fault current limiting and interrupting operation of hybrid DC circuit breaker (DCCB) using double quench, which consists of DCCB, a series resonance circuit, power electronic switch, surge arrestor, two separated current limiting reactor/resistor, and two superconducting elements, were suggested. The suggested hybrid DCCB can perform the interrupting operation after twice or once DC fault current limiting operation according to DC fault current amplitude. To verify the effective operation of the suggested hybrid DCCB, the modeling for the components of DCCB, the surge arrestor, and the SCE was carried out and its DC operational characteristics were analyzed. Through the analysis of the modeling results for the suggested hybrid DCCB, the advantages of hybrid DCCB were discussed.

Research on All-Solid-State DC Circuit Breaker with Active Fault Current-limiting Circuit

2021 ◽  
Author(s):  
Juheng Wang ◽  
Kun Dong ◽  
Jianfeng Zhao ◽  
Zhan Shi ◽  
Yue Yu ◽  
...  
Keyword(s):  
Solid State ◽  
Active Fault ◽  
Circuit Breaker ◽  
Fault Current ◽  
Current Limiting ◽  
Dc Circuit Breaker

A CO2/O2 Mixed Gas DC Circuit Breaker With Superconducting Fault Current-Limiting Technology

2020 ◽  
Vol 35 (4) ◽  
pp. 1960-1967 ◽  
Author(s):  
Bin Xiang ◽  
Lei Gao ◽  
Jinhui Luo ◽  
Chuanchuan Wang ◽  
Zhenle Nan ◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Mixed Gas ◽  
Current Limiting ◽  
Dc Circuit Breaker

scholarly journals A Current-Commutation DC Circuit Breaker with Adaptive Reclosing Capability

2021 ◽  
Vol 256 ◽  
pp. 01020
Author(s):  
Chunbing Jiang ◽  
Chengyong Zhao
Keyword(s):  
Electronic Devices ◽  
Circuit Breaker ◽  
Fault Isolation ◽  
Normal Operation ◽  
Fault Current ◽  
Power Electronic ◽  
Dc Fault ◽  
Current Commutation ◽  
Dc Circuit Breaker ◽  
A Current

DC faults are critical events in a flexible high-voltage dc (HVDC) grid. Thus, ensuring that the power system returns to normal operation rapidly and reliably after fault isolation is very important. This requires a HVDC breaker. In overhead line systems under temporary faults, reclosing is often required. However, once the dc circuit breaker (DCCB) is reclosed directly, the large second overcurrent may occur which could damage the power electronic devices. To avoid this problem, a current-commutation DC circuit breaker with adaptive reclosing capability is proposed. Compared with the traditional auto-reclosing strategy, the second damage under permanent fault condition can be avoided by the proposed DCCB, which can identify the fault property. Compared with the hybrid DCCB, the power electronic breaking branch composed of lots of IGBTs is replaced by the current-commutation branch, which is employed to interrupt bi-directional dc fault current. Moreover, bypassing branch is configured to reduce the energy dissipation of arrester and shorten the fault isolation time effectively. Finally, simulation cases in PSCAD /EMTDC verify the effectiveness and superiorities of the proposed DCCB.

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