Results 11 to 20 of about 101 (92)

Low-Voltage Ride Through Strategy for MMC With Y₀/Y₀ Arrangement Transformer Under Single-Line-to-Ground Fault

IEEE Access, 2021
In the offshore wind farm high-voltage direct-current (HVDC) system, the power delivery capability of the onshore modular multilevel converter (MMC) decreases severely under grid fault, which makes the DC-bus voltage increase rapidly and threatens the ...
Xiaohe Wang, Xu Cai, Qing Chen, Bin Lin, Rui Xie   +4 more
doaj   +1 more source

Hybrid flexible arc suppression device based on soft grid connection strategy for MV distribution systems

IET Generation, Transmission & Distribution, 2021
As an essential apparatus in resonance grounding systems, the arc suppression coil is widely used in rejecting the single‐line‐to‐ground (SLG) fault of distribution networks.
Ze‐Yin Zheng, Mou‐Fa Guo, Tao Jin, Jian‐Hong Liu   +3 more
doaj   +1 more source

IEC 61850-Based Centralized Protection against Single Line-To-Ground Faults in Ungrounded Distribution Systems

Energies, 2021
We developed an International Electrotechnical Commission (IEC) 61850-based centralized protection scheme to prevent single line-to-ground (SLG) faults in the feeders and busbars of ungrounded distribution systems.
Soon-Ryul Nam, Woong-Hie Ko, Sopheap Key, Sang-Hee Kang, Nam-Ho Lee   +4 more
doaj   +1 more source

Principle of Flexible Ground-Fault Arc Suppression Device Based on Zero-Sequence Voltage Regulation

IEEE Access, 2021
Single-line-to-ground (SLG) fault arcs cause the intermittent over-voltages, leading to short circuits within large-scale area. In this paper, a flexible arc suppression device is proposed, which adopts a zigzag grounding transformer, multi-terminal ...
Bishuang Fan, Ganzhou Yao, Kun Yu, Xiangjun Zeng, Wen Wang, Chao Zhuo, Josep M. Guerrero   +6 more
doaj   +1 more source

Stator single-line-to-ground fault protection for powerformers based on HSGC and CNN

Frontiers in Energy Research, 2022
It is necessary for powerformers running in parallel to identify which powerformer occurs at the stator single-line-to-ground (SLG) fault. Some state-of-the-art fusion discriminations are used to identify stator SLG fault, but these methods extract fault
Xiaohan Liu, Yuanyuan Wang, Xiaomin Luo, Chengjun Cao, Wei Li, Buming Wang, Jiabao Wang, Yin Wang   +7 more
doaj   +1 more source

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

IEEE Access, 2021
Under single-line-to-ground (SLG) faults, the voltages and currents in resonant grounded systems will inevitably be distorted. To locate the faults quickly and accurately, this paper proposes a location method based on fault distortions. The faulty phase
Yougen Chen, Junbo Yin, Zhiyong Li, Renyong Wei   +3 more
doaj   +1 more source

Transmission line fault classification based on spatiotemporal characteristic analysis with global and local discriminant analysis

Engineering Science and Technology, an International Journal, 2023
To ensure the reliability of power supply, ultra-fast and reliable fault classification of the transmission line is the critical stage of the wide-area transmission network protection.
Tong Zhang, Nan Wang
doaj   +1 more source

Accurate fault location method for distribution network in presence of DG using distributed time‐domain line model

IET Generation, Transmission & Distribution, 2022
In this paper a novel technique is presented for fault location in distribution networks in the presence of distributed generators (DGs). The proposed approach uses recorded voltage and current at the beginning of feeder and DG terminals.
Faeze Mohajer, Javad Sadeh
doaj   +1 more source

Space Vector Pulse-Width Modulation Control Strategy for Four-Leg Inverters Under Single Line-to-Ground Faults in Islanded Microgrids

IEEE Access, 2022
In this paper, we propose a novel switching modulation scheme for three-phase four-leg inverters that enables the separation of the fault points occurring in AC distribution networks.
Chang-Gyun An, Bong-Yeon Choi, Hoon Lee, Tae-Gyu Kim, Kyung-Min Kang, Mina Kim, Yoon-Seong Lee, Junsin Yi, Chung-Yuen Won   +8 more
doaj   +1 more source

Power Ripple Control Method for Modular Multilevel Converter under Grid Imbalances

Energies, 2022
Modular multilevel converters (MMCs) are primarily adopted for high-voltage applications, and are highly desired to be operated even under fault conditions.
Mohammed Alharbi, Semih Isik, Abdulaziz Alkuhayli, Subhashish Bhattacharya   +3 more
doaj   +1 more source