Results 31 to 40 of about 577 (206)

Research on Coordinated Control of Dynamic Reactive Power Sources of DC Blocking and Commutation Failure Transient Overvoltage in New Energy Transmission

Energies
With the large-scale deployment of renewable energy, transmission systems for new energy sources are increasingly exposed to transient overvoltage issues induced by DC blockages and commutation failures. To address the challenges of an imprecise response
Shuqin Sun, Zhenghai Yuan, Dezhi Chen, Zaihua Li, Xiaojun Tang, Yunting Song, Guanghao Zhou   +6 more
doaj   +2 more sources

Evaluation of the efficacy of transient overvoltages suppression measures in different wind farm topologies using SF6 circuit breaker. [PDF]

Sci Rep, 2023
Various overvoltage mitigation schemes were used in literature in suppression of switching overvoltages in wind farms. However, the evaluation of how the effectiveness of these mitigation techniques would vary with the change of the wind farm topology is
Eliyan T, Wadie F.
europepmc   +2 more sources

Research on Overvoltage Suppression by Blocking Diode and DC Circuit Breaker in LCC-VSC Hybrid HVDC System

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

Overvoltage and Oscillation Suppression Circuit With Switching Losses Optimization and Clamping Energy Feedback for SiC MOSFET [PDF]

, 2021
The snubber circuit is a cost-effective solution to reduce the severe turn-off overvoltage and oscillation caused by the fast switching characteristics of SiC MOSFET.
Yang, Chengzi, Laili Wang, Yu, Longyang, Braham Ferreira, Chengzi Yang, Yunqing Pei, Fan Zhang, Longyang Yu, Ferreira, Braham, University, Xi'an, Wang, Laili, Zhang, Fan   +11 more
core   +1 more source

Energy Storage System Control Strategy for Restraining Overvoltage Caused by Switching Non-Load Power Transmission Lines

IEEE Access, 2021
During the switching operation of the non-load power transmission lines, the undisired switching overvoltage issue is inevitable, causing grid voltage oscillations, waveform distortion and other phenomena at the end of the non-load power transmission ...
Bo Yang, Haojie Yu, Guanjun Li, Anping Hu, Haoyuan Li   +4 more
doaj   +1 more source

Research on overvoltage characteristics and influencing factors of converter station under grounding fault

Energy Reports, 2022
In grounding fault of DC system, overvoltage will appear on equipment nodes in converter station. Due to different operation mode and equipment type, it is very different from overvoltage in AC system.
Zongyang Zhang, Zhiyuan Wang, Chao Kang, Fang Yu, Zixin Ma, Jie Guo   +5 more
doaj   +1 more source

Insulator fault feature extraction system of substation equipment based on machine vision

IET Networks, EarlyView., 2022
Abstract The artificial intelligence technology and intelligent automation are more and more widely used, the insulators play a supporting and insulating role in the operation of the grid. The use of machine vision inspection technology to detect insulator faults has become an inevitable trend of the times.
Keruo Jiang, Qiaoqun Xia, Lijun Ma, Xin Xu, Zhipeng Shao   +4 more
wiley   +1 more source

Multi DC coordinated transient overvoltage suppression strategy for high proportion new energy sending terminal area

电力工程技术, 2023
Aiming at the transient overvoltage problem of high proportion new energy multi direct current (DC) transmission system caused by DC blocking fault, the interaction mechanism between multiple DC lines is analyzed firstly and the multi-outfeed voltage ...
ZHANG Qirui, XIN Chaoshan, LI Fengting, YIN Chunya, LIU Jiangshan, LI Yuan   +5 more
doaj   +1 more source

Suppression of ferromagnetic resonance overvoltage in CVT and feature analysis of secondary voltage under different faults

Zhejiang dianli, 2023
Aiming at the problem of overvoltage caused by ferromagnetic resonance fault of 220 kV CVT （capacitive voltage transformer） and the problem of false alarm of 3U0 monitoring device， a simulation model is established based on actual parameters， and the ...
LI Bowen, HE Da, YANG Zhi, ZHENG Yiming, LIN Jiajun, ZHANG Qiaogen   +5 more
doaj   +1 more source

Application of MMC with Embedded Energy Storage for Overvoltage Suppression and Fault Ride-through Improvement in Series LCC-MMC Hybrid HVDC System

Journal of Modern Power Systems and Clean Energy, 2023
The series line-commutated converter (LCC) and modular multilevel converter (MMC) hybrid high-voltage direct current (HVDC) system provides a more economical and flexible alternative for ultra-HVDC (UHVDC) transmission, which is the so-called Baihetan ...
Xiaodong Li, Zheng Xu, Zheren Zhang
doaj   +1 more source