scholarly journals A Resonant Hybrid DC Circuit Breaker for Multi-Terminal HVDC Systems

2020 ◽  
Vol 12 (18) ◽  
pp. 7771
Author(s):  
Ryo Miyara ◽  
Akito Nakadomari ◽  
Hidehito Matayoshi ◽  
Hiroshi Takahashi ◽  
Ashraf M. Hemeida ◽  
...  
Keyword(s):  
Direct Current ◽  
Circuit Breaker ◽  
Zero Point ◽  
Circuit Breakers ◽  
Transmission Systems ◽  
High Voltage Direct Current ◽  
Current Transmission ◽  
Dc Circuit Breaker ◽  
Current Zero ◽  
Hybrid Circuit

High-voltage direct current (DC) transmission systems and multi-terminal direct current transmission systems are attracting attention for expanding the grid to promote introduction of renewable energy. Fault clearing in DC systems is difficult because there is no zero point of current. Hybrid circuit breakers are suitable for fault clearing in DC systems. Conventional hybrid circuit breakers have a hard-switching path that damages the switch. Hard switching damages the device and produces emissions due to harmonic noise. A novel resonant hybrid DC circuit breaker is proposed in this paper. The proposed circuit breaker reduces the damage to the switching device using soft switching due to the current zero point. The proposed circuit breaker is compared with conventional hybrid circuit breakers using numerical simulations. Interruption times and switching types of circuit breakers were compared. The simulation results of the fault clearing characteristics of the proposed breakers show that the proposed breakers have sufficient performance and are capable of stable reconnections in multi-terminal direct current transmission systems.

scholarly journals Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct Current Transmission Systems

2014 ◽  
Vol 47 (3) ◽  
pp. 11910-11916 ◽  
Author(s):  
Martin Andreasson ◽  
Mohammad Nazari ◽  
Dimos V. Dimarogonas ◽  
Henrik Sandberg ◽  
Karl H. Johansson ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Current Control ◽  
Transmission Systems ◽  
High Voltage Direct Current ◽  
Current Transmission

scholarly journals Improved Two-Level Voltage Source Converter for High-Voltage Direct Current Transmission Systems

2017 ◽  
Vol 5 (4) ◽  
pp. 1670-1686 ◽  
Author(s):  
Grain Philip Adam ◽  
Ibrahim Abdelsalam ◽  
John Edward Fletcher ◽  
Lie Xu ◽  
Graeme M. Burt ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Transmission Systems ◽  
High Voltage Direct Current ◽  
Current Transmission

scholarly journals A Hybrid DC Circuit Breaker with Fault-Current-Limiting Capability for VSC-HVDC Transmission System

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2388 ◽  
Author(s):  
Muhammad Ahmad ◽  
Zhixin Wang
Keyword(s):  
Energy Absorption ◽  
Direct Current ◽  
Circuit Breaker ◽  
Good Alternative ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Fault Current ◽  
Circuit Breakers ◽  
Current Limiting ◽  
Hybrid Circuit

The direct current circuit breakers are considered a promising option to protect the transmission line against commonly appearing line-to-ground fault. However, the challenges of losses in the nonoperational stage, escalation of response against fault current, and large fault current handling capability remain the debatable issues for direct current circuit breakers. This paper introduces a novel topology of the hybrid circuit breaker with fault-current-limiting characteristics, which contains three branches: the main branch, fault-current-limiting branch, and energy absorption branch. The main branch includes a mechanical switch, breaker impedance, and bidirectional power electronics switches. In the fault-current-limiting branch, a fault-current-limiting circuit is introduced which contains n numbers of bidirectional switches and current-limiting inductors, which are connected in series to make the design modular in nature. During the normal working stage, the current flows through the main branch of the breaker. Once a fault in the system is confirmed, the fault current is transferred to the fault-current-limiting branch. At this stage, the intensity of the fault current is reduced significantly using the fault-current-limiting circuit, and finally, the residual current is shifted to the energy absorption branch. The working principle, design considerations, and parametric analysis concerning the design of hybrid circuit breakers are incorporated in this paper. The performance of the proposed breaker is evaluated using a three-terminal voltage-source converter-based high-voltage direct current transmission network; for this purpose, a PSCAD/EMTDC simulation tool is used. The performance of the proposed breaker is also compared with other topologies. The comparative analysis shows that the proposed breaker is a good alternative considering high fault current interruption requirements, response time against fault current, and power losses.

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