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.

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.

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 A New Topology of a Fast Proactive Hybrid DC Circuit Breaker for MT-HVDC Grids

2019 ◽  
Vol 11 (16) ◽  
pp. 4493 ◽  
Author(s):  
Fazel Mohammadi ◽  
Gholam-Abbas Nazri ◽  
Mehrdad Saif
Keyword(s):  
Circuit Breaker ◽  
Injection Technique ◽  
Fault Current ◽  
Current Interruption ◽  
Hvdc System ◽  
Switching Power ◽  
Dc Fault ◽  
Simulation Based ◽  
Dc Circuit Breaker ◽  
Converter Topology

One of the major challenges toward the reliable and safe operation of the Multi-Terminal HVDC (MT-HVDC) grids arises from the need for a very fast DC-side protection system to detect, identify, and interrupt the DC faults. Utilizing DC Circuit Breakers (CBs) to isolate the faulty line and using a converter topology to interrupt the DC fault current are the two practical ways to clear the DC fault without causing a large loss of power infeed. This paper presents a new topology of a fast proactive Hybrid DC Circuit Breaker (HDCCB) to isolate the DC faults in MT-HVDC grids in case of fault current interruption, along with lowering the conduction losses and lowering the interruption time. The proposed topology is based on the inverse current injection technique using a diode and a capacitor to enforce the fault current to zero. Also, in case of bidirectional fault current interruption, the diode and capacitor prevent changing their polarities after identifying the direction of fault current, and this can be used to reduce the interruption time accordingly. Different modes of operation of the proposed topology are presented in detail and tested in a simulation-based system. Compared to the conventional DC CB, the proposed topology has increased the breaking current capability, and reduced the interruption time, as well as lowering the on-state switching power losses. To check and verify the performance and efficiency of the proposed topology, a DC-link representing a DC-pole of an MT-HVDC system is simulated and analyzed in the PSCAD/EMTDC environment. The simulation results verify the robustness and effectiveness of the proposed HDCCB in improving the overall performance of MT-HVDC systems and increasing the reliability of the DC grids.

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.

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 DC Fault Current Analyzing, Limiting, and Clearing in DC Microgrid Clusters

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6337
Author(s):  
Navid Bayati ◽  
Hamid Reza Baghaee ◽  
Mehdi Savaghebi ◽  
Amin Hajizadeh ◽  
Mohsen N. Soltani ◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Low Complexity ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Dc Microgrid ◽  
Dc Fault ◽  
In Series ◽  
Dc Circuit Breaker ◽  
Complexity Cost ◽  
Analytical Expressions

A new DC fault current limiter (FCL)-based circuit breaker (CB) for DC microgrid (MG) clusters is proposed in this paper. The analytical expressions of the DC fault current of a bidirectional interlink DC/DC converter in the interconnection line of two nearby DC MGs are analyzed in detail. Meanwhile, a DC fault clearing solution (based on using a DC FCL in series with a DC circuit breaker) is proposed. This structure offers low complexity, cost, and power losses. To assess the performance of the proposed method, time-domain simulation studies are carried out on a test DC MG cluster in a MATLAB/Simulink environment. The results of the proposed analytical expressions are compared with simulation results. The obtained results verify the analytical expression of the fault current and prove the effectiveness of the proposed DC fault current limiting and clearing strategy.

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