Results 61 to 70 of about 577 (206)

Comparative Assessment of Switching Overvoltages Suppression Measures in Different Wind Farm Topologies

IEEE Access, 2023
Mitigation techniques associating vacuum circuit breakers (VCB) were proven highly effective in reducing switching overvoltages (SOV) in wind farms. However, the structure of wind farms in modern-day power systems is not fixed to a certain topology. In this paper, the impact of changing the topology of the wind farm upon the capability of mitigation ...
Tamer Eliyan, Ibrahim B. M. Taha, Fady Wadie   +2 more
openaire   +2 more sources

The Impact of Various Contact Structures on the Microscopic Surface Condition of Vacuum Interrupters During Capacitive Switching

High Voltage, EarlyView.
ABSTRACT The double‐break vacuum circuit breakers (VCBs) that utilize series break technology effectively increase the switching capability for capacitive currents, elevate the withstand voltage level, and reduce the likelihood of restrike, all without compromising the breaking capacity for short‐circuit currents.
Yun Geng, Xiaofei Yao, Pu Chen, Rong Jia, Hannan Shan, Yingsan Geng, Zhiyuan Liu   +6 more
wiley   +1 more source

Comprehensive Design and Experimental Validation of 30 kV Ultra‐Fast Flexible Controllable Arresters for HVDC Systems

High Voltage, EarlyView.
ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang, Xiangyu Zhang, Sihang Wu, Lei Qi, Xiang Cui   +4 more
wiley   +1 more source

A novel method of overvoltage suppression due to de-energization of shunt reactor in high voltage system

, 2023
Substations usually employ shunt reactors to reduce the reactive power of systems. Due to current chopping when the shunt reactor is shut off, a high frequency and amplitude overvoltage is generated.
Al-Yozbaky, Omar Sh., Jamil, Mohamad Kamarol Mohd, Al-Tak, Mazyed A., Ain, Mohd Fadzil Bin   +3 more
core   +1 more source

Research on transient AC overvoltage suppression method of DC sending end based on novel fast-excitation MCR

International Journal of Electrical Power & Energy Systems
The growing reliance on high-power high-voltage direct current (HVDC) transmission systems has intensified challenges associated with transient AC overvoltage induced by commutation failures resulting from converter operation characteristics.
Xiyu Yin, Xiaoyue Chen, Linyu Zhang, Shan Li, Yujie Ding, Rui Song, Chunlai Li   +6 more
doaj   +1 more source

Self‐Assisted Charge Storage‐Release Mechanism Enabling Flexible Design of Biomimetic Triboelectric Nanogenerators

Advanced Science, Volume 13, Issue 34, 19 June 2026.
Inspired by the mimosa, this study develops a flexible triboelectric nanogenerator with a novel microneedle array and battery‐mimetic architecture. The device introduces a spontaneous charge self‐regulation mechanism that confines the electric field below the air breakdown threshold, and achieves an outstanding charge density of 396.50 µC m−2 ...
Hanpeng Gao, Yamin Hu, Li Li, Ana Sofia Oliveira Henriques Moita, Xi Wang, Zong Meng, Zhiwu Han, Yan Liu   +7 more
wiley   +1 more source

Principle and Control Design of Active Ground-Fault Arc Suppression Device for Full Compensation of Ground Current [PDF]

, 2017
Traditional ground-fault arc suppression devices mainly deal with capacitive component of ground current and have weak effect on the active and harmonic ones, which limits the arc suppression performance.
Yan, Lingjie, Guerrero, Josep M.; id_orcid, Xu, Xianyong, Wang, Wen, Zeng, Xiangjun   +4 more
core   +1 more source

IGBT Overvoltage Protection Based on Dynamic Voltage Feedback and Active Clamping

, 2023
In view of the stability of the unmanned aerial vehicle (UAV) power system, this paper found that the voltage spike generated by IGBT mainly occurs when the IGBT is turned off in the study of the power system interior and IGBT drive and overvoltage ...
Zhichao Xiong, Yuying Zhao, Mingfang Chen, Zunbo Ma, Yongxia Zhang, Enxiao Zhu   +5 more
core   +1 more source

Suppression of AC overvoltage at sending end under DC transmission system fault based on controllable energy dissipation

电力工程技术
In the conventional high voltage direct current transmission system with large-scale new energy access, when commutation failure or DC blocking occurs at the receiving end, the reactive power surplus at the sending converter station may cause overvoltage
Yongrui HUANG, Kun HAN, Qiuling HU, Wenbo ZHANG, Hongtao YUAN, Zhuke SHAO   +5 more
doaj   +1 more source

Coordinated DC Fault Ride‐Through Control for a Grid‐Forming Wind‐Storage System With VSC‐HVDC Integration Under Transmission Constraints

Engineering Reports, Volume 8, Issue 6, June 2026.
Due to complex wind farm conditions, a coordinated control system was designed. It manages DC power surges during AC faults by temporarily storing excess energy and regulating voltages. This strategy optimizes unbalanced power and enables effective fault recovery, resulting in minimal voltage fluctuations and superior performance.
Lei Chen, Qi Han
wiley   +1 more source