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.

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 Analysis of the DC Fault Current Limiting Characteristics of a DC Superconducting Fault Current Limiter Using a Transformer

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4210
Author(s):  
Kang-Cheol Cho ◽  
Min-Ki Park ◽  
Sung-Hun Lim
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Long Distance ◽  
Superconducting Fault Current Limiter ◽  
Dc System ◽  
Dc Fault ◽  
Current Limiting ◽  
New Type ◽  
Current Limiter

Recently, a lot of interesting research has been conducted to solve the fault current problem of the DC system. In long-distance transmission, DC transmission is more economical than AC transmission. The connection of power grids with a DC system can also better control the power flow and provide high stability. However, the control of the fault current in a DC system is more difficult to handle than in an AC system because the DC system does not make a zero point, unlike the AC system. In addition, there is a disadvantage, in that an arc occurs when a circuit breaker operates. In this paper, a new type of DC superconducting fault current limiter (SFCL) is proposed. This new type of SFCL is composed of two superconducting elements, a current limiting resistor/reactor (CLR), and a transformer. With the proposed SFCL, the DC fault current limiting experiments were performed and the DC fault current limiting characteristics of this SFCL due to the component of the CLR were analyzed.

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

scholarly journals Short-Circuit Fault Current Calculation Method for the Multi-Terminal DC Grid Considering the DC Circuit Breaker

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1347
Author(s):  
Haipeng Jia ◽  
Jingyuan Yin ◽  
Tongzhen Wei ◽  
Qunhai Huo ◽  
Jinke Li ◽  
...  
Keyword(s):  
Calculation Method ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Fault Current ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Dc System ◽  
Short Circuit Calculation ◽  
Dc Circuit Breaker ◽  
Short Circuit Fault

The analysis and calculation of the short-circuit fault current in the DC grid is of great significance to the design and configuration of the converter station and DC circuit breaker parameters. The existing flexible DC system not only includes the modular multilevel converter (MMC) converter, but also needs power equipment such as the fault current limiter and DC circuit breaker. Therefore, the system modeling and short circuit calculation of the multi-terminal DC system after adding the DC circuit breaker are also of great significance for the design of DC power system parameters and the grid troubleshooting ability. In this paper, firstly, the parameters of the four-terminal DC system of the modular multilevel converter (MMC) are simplified, and the analytical solution of the short circuit fault current of the multi-terminal DC system is given. Then, the external characteristics of the cascaded hybrid DC circuit breaker are modeled. Based on the equivalent circuit of the fault current in different stages, the short circuit calculation method of four-terminal MMC system with DC circuit breaker is obtained. This method can effectively describe the overall trend of fault current and provide the basis for the configuration of DC line protection settings and DC circuit breaker related parameters.

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
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