Results 61 to 70 of about 1,814,391 (304)

Fault response comparison of LCC–MMC hybrid topologies and conventional HVDC topology

The Journal of Engineering, 2018
The modular multilevel converter (MMC) can be used to upgrade conventional line commutated converter-based HVDC systems (LCC-HVDC), construct the hybrid topologies of LCC and MMC to acquire better fault responses.
Boliang Lou, Hua Zhou, Zheng Xu, Shijia Wang, Yuzhe Xu   +4 more
doaj   +1 more source

Offshore DC Grids as an Interconnection of Radial Systems : Protection and Control aspects [PDF]

, 2015
Peer ...
Jovcic, Dragan, Nguefeu, S., Taherbaneh, Mohsen, Taisne, J.P.   +3 more
core   +1 more source

Research and experiment of a current-limiting HVDC circuit breaker

The Journal of Engineering, 2019
Existing mechanical HVDC circuit breakers (CB) are capable of interrupting HVDC currents within several tens of milliseconds, but this is too slow to satisfy the requirements of a reliable HVDC grid.
Yi Du, Junpeng Deng, Hongyang Lin, Huan Zheng, Kangli Xiang, Yu Shen   +5 more
doaj   +1 more source

The Alternate Arm Converter: A New Hybrid Multilevel Converter With DC-Fault Blocking Capability

, 2013
This paper explains the working principles, supported by simulation results, of a new converter topology intended for HVDC applications, called the alternate arm converter (AAC).
Critchley, R, Crookes, W, Green, TC, Hassan, F, Merlin, MMC, Mitcheson, PD, Trainer, DR   +6 more
core   +1 more source

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks [PDF]

, 2019
In the last decade, distribution systems are experiencing a drastic transformation with the advent of new technologies. In fact, distribution networks are no longer passive systems, considering the current integration rates of new agents such as ...
Barragán Villarejo, Manuel, Demoulias, Charis, Gómez Expósito, Antonio, Mauricio Ferramola, Juan Manuel, Maza Ortega, José María   +4 more
core   +1 more source

A Fault Identification Method of Hybrid HVDC System Based on Wavelet Packet Energy Spectrum and CNN

Electronics
Aiming at the shortcomings of traditional fault identification methods in fault information acquisition, In the scenario of hybrid HVDC transmission system, a new fault identification method is proposed by using wavelet packet energy spectrum and ...
Yan Liang, Junwei Zhang, Zheng Shi, Haibo Zhao, Yao Wang, Yahong Xing, Xiaowei Zhang, Yujin Wang, Haixiao Zhu   +8 more
semanticscholar   +1 more source

Evaluation of a Local Fault Detection Algorithm for HVDC Systems [PDF]

, 2019
A great increase in the amount of energy generated from clean and renewable sources integrated in the electric power system is expected worldwide in the coming years.
Eguia Lopez, P., Larruskain Eskobal, M., Perez Molina, M.J., Rodriguez Sanchez, R., Santos Mugica, M.   +4 more
core   +2 more sources

A Commutation Failure Suppression Control Method Based on the Controllable Operation Region of Hybrid Dual-Infeed HVDC System

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, Xiaofu Xiong, Jinxin Ouyang, Getu Ma, Di Zheng, Ting Tang   +5 more
doaj   +1 more source

Study on the characteristic of the grounding fault on the cascaded midpoint side of the hybrid cascaded HVDC system

Frontiers in Energy Research, 2023
The hybrid cascaded high-voltage direct current (HVDC) system combines the system support capabilities of the modular multilevel converter (MMC) with the capacity of the line-mutated converter’s (LCC’s) advantage of high-power transmission.
Yonghao Ren, Huadong Sun, Shanshan Wang, Bing Zhao, Shiyun Xu, Min Liu, Panjie Lian   +6 more
doaj   +1 more source

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