Dc fault protection of multi-terminal VSC-HVDC system with hybrid dc circuit breaker

2016 ◽  
Author(s):  
Yalong Li ◽  
Xiaojie Shi ◽  
Fred Wang ◽  
Leon M. Tolbert ◽  
Jin Liu
Keyword(s):  
Circuit Breaker ◽  
Hvdc System ◽  
Fault Protection ◽  
Dc Fault ◽  
Dc Circuit Breaker

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.

A Series-Type Hybrid Circuit Breaker (S-HCB) Concept for Ultrafast DC Fault Protection

2022 ◽  
pp. 1-1
Author(s):  
Zheng John Shen ◽  
Yuanfeng Zhou ◽  
Risha Na ◽  
Triston Cooper ◽  
Mahmoud Al Ashi ◽  
...  
Keyword(s):  
Circuit Breaker ◽  
Fault Protection ◽  
Dc Fault ◽  
Series Type ◽  
Hybrid Circuit

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.

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