Results 1 to 10 of about 21,120 (228)
Development and Application of a 10 kV Mechanical DC Circuit Breaker [PDF]
Energies, 2019 A DC circuit breaker is piece of core equipment for DC grid construction and can achieve fast isolation of DC faults in the grid. In this paper, based on the fault characteristics and protection requirements of an AC/DC hybrid distribution network, the ...
Lu Qu +5 more
doaj +5 more sources
Experimental investigations on the post-arc current of the vacuum circuit breaker in an active mechanical DC circuit breaker [PDF]
AIP Advances, 2021 Vacuum circuit breakers (VCB) are commonly used in active mechanical direct current circuit breakers (DC CBs) to accomplish the interruption of the fault current.
Shenli Jia +3 more
doaj +3 more sources
Mechanical DC circuit breaker model for real time simulations
International Journal of Electrical Power and Energy Systems, 2019 Abstract The main goal of the paper is the modeling of the mechanical circuit breaker (MCB) that can replicate the breaker characteristics in real time environment. The proposed MCB with active current injection is modelled for a system level, which provides adequate representation of the circuit breakers for system analysis studies. External current-
Zhou Liu +2 more
exaly +5 more sources
A Medium-Voltage Hybrid DC Circuit Breaker—Part II: Ultrafast Mechanical Switch
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2017 This paper presents the test results of an ultrafast (less than 2 ms) medium-voltage hybrid dc circuit breaker prototype that consists of three switching devices: a 15-kV silicon carbide (SiC) emitter turn-off thyristor as the main breaker (MB), a fast acting mechanical switch, and a commutating switch (CS) to quickly divert the primary current to the ...
Chang Peng +2 more
exaly +3 more sources
Energies, 2021 DC systems are modernly starting to come into the spotlight again due to the carbon-neutral policy, the development of semiconductor devices for power, and the increase in digital loads.
Sang-Yong Park, Hyo-Sang Choi
doaj +2 more sources
Successful fault current interruption on DC circuit breaker [PDF]
IET Power Electronics, 2016 This study focus on the interruption capability of the DC circuit breaker employing a current commutation approach and evaluates the two main factors that determine the success rate for breaker current interruption, namely the current slope di/dt before ...
Barry W Williams, Stephen J Finney
exaly +2 more sources
Modeling and Simulation of ±10 kV DC Transmission System based on Mechanical DC Circuit Breaker
IOP Conference Series: Materials Science and Engineering, 2020 Abstract In order to simulate the interruption process of mechanical DC circuit breaker in actual DC power grid and obtain various stress characteristics of DC circuit breaker in actual interruption process, it is necessary to establish a stable and effective flexible DC system model with good dynamic performance.
Jiashuo Cui +3 more
openaire +2 more sources
The Journal of Engineering, 2019 Recently, there has been significant interest in developing the modular multilevel converter (MMC) based DC grids in the power industry. However, the immature DC circuit breaker (DCCB) technology hampers the development of DC grids in overhead lines ...
Binye Ni +4 more
doaj +2 more sources
High Voltage, 2019 The article proposes a mechanical DC circuit breaker (CB) based on a series LC circuit. It requires two switches (a fast disconnector and an AC circuit breaker), an inductor and a capacitor, and therefore the cost is expected to be low.
Dragan Jovcic
doaj +3 more sources
International Journal of Electrical Power & Energy Systems, 2021 Abstract With rated voltage of multi-terminal direct current (MTDC) power transmission system varying from ±160 kV to ±500 kV and even ±800 kV, high-voltage direct current circuit breaker (DCCB) is in urgent demand. With remarkable features of low operating losses, free-maintenance, and relative small investment, DCCBs based on mechanical vacuum ...
Pengyu Li +5 more
openaire +2 more sources