Results 1 to 10 of about 23,181 (119)

Impact of Grid Topology on Pole-to-ground Fault Current in Bipolar DC Grids: Mechanism and Evaluation

Journal of Modern Power Systems and Clean Energy, 2023
The fault current level analysis is important for bipolar direct current (DC) grids, which determines the operation and protection requirements. The DC grid topology significantly impacts the current path and then the fault current level of the grid ...
Yingmin Zhang, Wenxin Zhang, Qiao Peng, Baohong Li, Yan Tao, Min Zhang, Tianqi Liu, Frede Blaabjerg   +7 more
doaj   +1 more source

A coordinated and steadily fault ride through strategy under short-circuit fault of the wind power grid connected system based on the grid-forming control

Energy Reports, 2022
With the continuous improvement of the penetration level of wind power in the power system, the grid-forming mode of wind turbine will gradually become one of the main modes of system synchronization.
Jianzu Hu, Yongning Chi, Xinshou Tian, Yunpeng Zhou, Wei He   +4 more
doaj   +1 more source

Grounding Grid Fault Diagnosis With Emphasis on Substation Electromagnetic Interference

IEEE Access, 2022
Grounding grid fault diagnosis is essential for the safe operation of a substation. However, the substation vicinity is highly electromagnetic. Therefore, the electromagnetic-based fault diagnosis is vulnerable to electromagnetic interference (EMI). This
Aamir Qamar, Ibrahim H. Al-Kharsan, Zahoor Uddin, Ahmed Alkhayyat   +3 more
doaj   +1 more source

Estimation of inertia demand in power systems considering wind power virtual inertia

International Journal of Electrical Power & Energy Systems
The high proportion of renewable energy integrated into the grid through numerous power electronic devices has reduced the overall system inertia level and operational stability and caused poor disturbance resistance.
Hongchun SHU, Haifei DONG, Jing CHEN, Guangxue WANG, Xi WANG, Botao SHI   +5 more
doaj   +1 more source

Fault Detecting and Isolating Schemes in a Low-Voltage DC Microgrid Network from a Remote Village

Energies, 2022
Fault detection and isolation are important tasks to improve the protection system of low voltage direct current (LVDC) networks. Nowadays, there are challenges related to the protection strategies in the LVDC systems. In this paper, two proposed methods
Pascal Hategekimana, Adria Junyent Ferre, Joan Marc Rodriguez Bernuz, Etienne Ntagwirumugara   +3 more
doaj   +1 more source

Pilot protection based on the quasi-directional element of LCL-tuned half-wavelength transmission line

International Journal of Electrical Power & Energy Systems
To create HWTL characteristics, the electrical distance of AC transmission lines is compensated to half the power frequency wavelength by utilizing tuned circuits.
Yutao Tang, Hongchun Shu, Yue Dai, Yu Zhang, Yiming Han   +4 more
doaj   +1 more source

The Architecture and Key Technologies of Fault Inversion System for Hybrid UHV AC/DC Power Grid

Zhongguo dianli, 2020
The security and stability problems of power grid have become increasingly prominent for the complexity and fragility of large-scale hybrid AC/DC. In order to quickly and accurately simulate the fault characteristics of power grid, a fault inversion ...
Bing WANG, Yupei JIA, Jianfeng YAN, Yiding JIN   +3 more
doaj   +1 more source

Grid voltage sensor fault‐tolerant control for single‐phase two‐level PWM rectifier

IET Electric Power Applications, 2022
The main purpose of this work is to address the problem of robust grid voltage sensor fault‐tolerant control for a single‐phase two‐level rectifier. First, considering a rectifier with disturbances and grid voltage sensor fault, the standard switched ...
Zifeng Gong, Deqing Huang, Lei Ma, Na Qin, Habib Ullah Khan Jadoon   +4 more
doaj   +1 more source

Calculation method of short-circuit fault current in flexible DC grid

Energy Reports, 2022
The flexible DC grid has the capability to transport and distribute electric energy in multiterminal power system, and avoid the adverse impact on AC power grid in reactive power consumption and current harmonic.
Shuai Yuan, Jun Yan, Yongjie Yu, Chengyong Zhao, Guoyun Su, Xuan Li   +5 more
doaj   +1 more source

Adaptability analysis of distance protection in flexible low frequency ac outgoing transmission line of wind power system

Results in Engineering
The extension of offshore wind power to medium and far seas has promoted the development of flexible low-frequency AC transmission (FLFAC) technology. However, the fault responses of the power electronic interface-type power sources (wind turbines and ...
Yue Dai, Hongchun Shu, Yutao Tang, Haoming Liu   +3 more
doaj   +1 more source