Results 21 to 30 of about 756 (255)
Applied Sciences, 2019 Since thyristor cannot turn off automatically, line commutated converter based high voltage direct current (LCC-HVDC) will inevitably fail to commutate and therefore auxiliary controls or voltage control devices are needed to improve the commutation ...
Jiangbo Sha +3 more
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Commutation failure caused by AC filter switching In HVDC system
The Journal of Engineering, 2019 Switching AC filter may cause harmonic impact, which may lead to commutation failure of HVDC system. Here, the commutation failure mechanism of HVDC system caused by AC filter switching is studied.
Meng Liu +3 more
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Studies of commutation failures in hybrid LCC/MMC HVDC systems
Global Energy Interconnection, 2020 A hybrid of line commutated converters (LCCs) and modular multi-level converters (MMCs) can provide the advantages of both the technologies. However, the commutation failure still exists if the LCC operates as an inverter in a hybrid LCC/MMC system.
Gen Li +6 more
doaj +1 more source
Criterion of single-phase fault nature of AC line considering the influence of commutation failure
电力工程技术, 2022 The amplitude of AC line current at the inverter side is affected by DC commutation failure and fluctuates for a short time after single-phase trip.The fluctuation range increases with the increase of the number of DC commutation failures,resulting in ...
LI Fengting +4 more
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Influence of single-phase circuit breaker tripping on inverter commutation
电力工程技术, 2022 If commutation failure does not occur when single-phase high resistance grounded in single-circuit AC line of inverter,then single-phase circuit breaker tripping may lead to commutation failure.
SONG Xinfu +4 more
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Research on commutation failure of Jinsu DC transmission project caused by a complex AC fault
The Journal of Engineering, 2019 Commutation failure is an important factor on safe and stable operation of the receiving-end power grid for high voltage direct current (HVDC) project. A commutation failure event in Jinsu DC transmission project caused by a complex AC failure was taken ...
Wei Peng +3 more
doaj +1 more source
The Journal of Engineering, 2018 Commutation failure caused by the fault of AC system at inverter side seriously affects the safety and stability of high-voltage direct current (HVDC) system.
Jinzhao Song +3 more
doaj +1 more source
Continuous commutation failure suppression strategy in hybrid multi-infeed HVDC transmission system
电力工程技术, 2022 For the wide application of high voltage direct current (HVDC) transmission engineering,the continuous commutation failure of line commutated converter HVDC (LCC-HVDC) has a seriously negative impact on the stable operation of the power system. Therefore,
ZHONG Mingming +4 more
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Quantitative Assessment for Commutation Security Based on Extinction Angle Trajectory
Journal of Modern Power Systems and Clean Energy, 2021 In order to reduce the risk of commutation failure (CF) in the AC/DC hybrid power system, the quantitative analysis on CF is required for on-line assessment and optimal control.
Qi Tao, Yusheng Xue
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Energies, 2018 With the increased use of high voltage direct current (HVDC) systems, line commutated converters (LCC-HVDC) and voltage source converters (VSC-HVDC) tend to feed into AC systems over short electrical distances.
Chao Xiao +5 more
doaj +1 more source