Results 41 to 50 of about 3,375 (209)
Circuit Breaker Failure Protection Strategy for HVDC Grids
Energies, 2021 HVDC grids demand the fast and reliable operation of the protection system. The failure of any protection element should initialize a backup protection almost immediately in order to assure the system’s stability.
María José Pérez-Molina +3 more
doaj +1 more source
Determination of protection system requirements for DC UAV electrical power networks for enhanced capability and survivability [PDF]
, 2011 A growing number of designs of future Unmanned Aerial Vehicle (UAV) applications utilise dc for the primary power distribution method. Such systems typically employ large numbers of power electronic converters as interfaces for novel loads and generators.
Burt, Graeme +3 more
core +1 more source
Systematic Approach to HVDC Circuit Breaker Sizing [PDF]
IEEE Transactions on Power Delivery, 2020 High-voltage direct current (HVDC) grids can be protected by HVDC circuit breakers (DCCB) to selectively clear DC side faults and assure continuous operation of the healthy parts in the grid. Line inductors in series with DCCBs are essential to reduce the rate of rise of the fault current and to slow down the voltage decline in the healthy parts of the
Abedrabbo, Mudar +2 more
openaire +1 more source
Journal of Modern Power Systems and Clean Energy, 2020 The high-voltage direct current (HVDC) circuit breaker is becoming popular with the rapid development of the flexible HVDC grid for efficient DC fault ride-through purposes.
Jianzhong Xu, Moke Feng, Chengyong Zhao
doaj +1 more source
Frontiers in Energy Research, 2023 A massive number of DC circuit breaker is usually necessary to be installed to protect HVDC grids from DC faults, this will lead to high capital costs because large number of expensive IGBT-in-series are used.
Qingpeng Zeng +9 more
doaj +1 more source
High Voltage, 2017 Multi-terminal voltage-sourced converters (VSC) high-voltage direct current (HVDC) transmission system is expected to play a vital role in future power systems.
Bin Chang +6 more
doaj +1 more source
IEEE Access, 2021 In this study, a LCC-VSC hybrid HVDC transmission system was taken as an example. The valve and neutral overvoltage of the hybrid HVDC system were simulated and then calculated at the VSC converter station by installing a blocking diode and a DC circuit ...
Wang Dongju, Zhou Hao
doaj +1 more source
DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application [PDF]
, 2015 Fast isolation and detection of DC faults is currently a limiting factor in high power DC transmission grid development. Recent research has shown that the role of DC/DC converters is becoming increasingly important in solving various DC grid challenges ...
Aboushady, Ahmed A. +2 more
core +2 more sources
Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability [PDF]
, 2014 One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed.
Aboushady, A.A., Ahmed, K.H.
core +2 more sources
Experimental Modeling of Forward Recovery Characteristics of IGBT for DC Circuit Breaker
Zhongguo dianli, 2021 DC circuit breaker is the main means to clear the faults in VSC-HVDC power grid. Before action of the hybrid DC circuit breaker, the IGBT in the transfer branch is in a state of zero voltage and zero current.
Hong SHEN +4 more
doaj +1 more source