A State-of-the-Art 500-kV Hybrid Circuit Breaker for a dc Grid: The World's Largest Capacity High-Voltage dc Circuit Breaker

2020 ◽  
Vol 14 (2) ◽  
pp. 15-27
Author(s):  
Xiangyu Zhang ◽  
Zhanqing Yu ◽  
Rong Zeng ◽  
Yulong Huang ◽  
Biao Zhao ◽  
...  
Keyword(s):  
High Voltage ◽  
State Of The Art ◽  
Circuit Breaker ◽  
Dc Circuit Breaker ◽  
Hybrid Circuit

scholarly journals Capacitor Commutation Method for MVDC Hybrid Circuit Breakers

Designs ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 28
Author(s):  
Hyosung Kim
Keyword(s):  
Short Circuit ◽  
Circuit Breaker ◽  
Reverse Current ◽  
Resonant Circuit ◽  
Power Circuit ◽  
Power Sources ◽  
Semiconductor Switch ◽  
Current Commutation ◽  
Dc Circuit Breaker ◽  
Hybrid Circuit

The medium voltage DC (MVDC) type system can connect multiple terminals to a common MVDC bus, so it is possible to connect several renewable DC power sources to the common MVDC bus, but a DC circuit breaker is needed to isolate short circuit accidents that may occur in the MVDC bus. For this purpose, the concept of a hybrid DC circuit breaker that takes advantage of a low conduction loss contact type switch and an arcless-breaking semiconductor switch has been proposed. During break the hybrid switch, a dedicated current commutation device is required to temporarily bypass the load current flowing through the main switch into a semiconductor switch branch. Existing current commutation methods include a proactive method and a reverse current injection method by a LC (Inductor-capacitor) resonant circuit. This paper proposes a power circuit of a new MVDC hybrid circuit breaker using a low withstanding voltage capacitor branch for commutation and a sequence controller according to it, and verifies its operation through an experiment.

A Contribution to the Development of High-Voltage dc Circuit Breaker Technologies: A Review of New Considerations

2021 ◽  
pp. 2-19
Author(s):  
Zhou Liu ◽  
Seyed Mirhosseini ◽  
Lian Liu ◽  
Marjan Popov ◽  
Kaiqi Ma ◽  
...  
Keyword(s):  
High Voltage ◽  
Circuit Breaker ◽  
Dc Circuit Breaker

Application of Genetic Algorithms on Parameter Estimation of HVDC Circuit Breaker

2011 ◽  
Vol 52-54 ◽  
pp. 1009-1014 ◽  
Author(s):  
Tao Jin ◽  
Wei Chen ◽  
Tao Ning
Keyword(s):  
Genetic Algorithm ◽  
Genetic Algorithms ◽  
Parameter Estimation ◽  
High Voltage ◽  
Curve Fitting ◽  
Circuit Breaker ◽  
High Voltage Circuit Breaker ◽  
Oscillation Circuit ◽  
Dc Circuit Breaker

In order to estimate the parameters of capacitance, inductance and resistance in oscillation circuit DC circuit breaker a method of parameter estimation of High-Voltage circuit break based on genetic algorithms is proposed and which can properly assess the performance of DC circuit breaker. In this paper A genetic algorithm is introduced and applied in parameter estimation of High-Voltage circuit breaker and then compare it with the traditional MATLAB curve fitting, the result clearly reveal the advantages of genetic algorithm.

scholarly journals Switching Behaviour of a Series Connection of a Vacuum Interrupter and a Gas Circuit Breaker

2019 ◽  
Vol 6 (3) ◽  
pp. 223-226 ◽  
Author(s):  
N. Götte ◽  
M. Bendig ◽  
T. Krampert ◽  
P. G. Nikolic
Keyword(s):  
High Voltage ◽  
Circuit Breaker ◽  
Dielectric Strength ◽  
Switching Behavior ◽  
Voltage Distribution ◽  
Natural Gases ◽  
Vacuum Interrupter ◽  
New Challenges ◽  
Hybrid Circuit ◽  
Transmission Level

After being in the focus of sciences' and industry's research and development activities for many years, the investigation of possible SF<sub>6</sub> gas-alternatives has been even more intensified after the revision of the European F-Gas regulation 517/2014. As natural gases yield a significantly lower dielectric strength in comparison to SF<sub>6</sub>, new challenges arise for the design of high voltage switchgear. Vacuum interrupters are environmentally friendly, reliable and able to withstand steep rising transient recovery voltages. In the last years, first installations of switchgear based on vacuum switching technology in sub-transmission level are in operation. One option for the realization of a SF<sub>6</sub> free high voltage switchgear for transmission level is the combination of a gas circuit breaker filled with an atmospheric gas with a vacuum interrupter in a hybrid switchgear. In this contribution the voltage distribution and switching behavior of a hybrid circuit breaker is experimentally investigated.

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