Results 21 to 30 of about 202,483 (295)

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

Improved DFIG Capability during Asymmetrical Grid Faults [PDF]

, 2015
In the wind power application, different asymmetrical types of the grid fault can be categorized after the Y/d transformer, and the positive and negative components of a single-phase fault, phase-to-phase fault, and two-phase fault can be summarized. Due
Blaabjerg, Frede, Zhou, Dao
core   +2 more sources

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

Modeling and Recognition of Smart Grid Faults by a Combined Approach of Dissimilarity Learning and One-Class Classification

, 2014
Detecting faults in electrical power grids is of paramount importance, either from the electricity operator and consumer viewpoints. Modern electric power grids (smart grids) are equipped with smart sensors that allow to gather real-time information ...
De Santis, Enrico, Livi, Lorenzo, Rizzi, Antonello, Sadeghian, Alireza   +3 more
core   +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

SPARCS: Stream-processing architecture applied in real-time cyber-physical security [PDF]

, 2019
In this paper, we showcase a complete, end-To-end, fault tolerant, bandwidth and latency optimized architecture for real time utilization of data from multiple sources that allows the collection, transport, storage, processing, and display of both raw ...
Boverhof, J, Gentz, R, Gunter, D, Peisert, S   +3 more
core   +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

Handling of unbalanced faults in HVDC-connected wind power plants [PDF]

, 2017
High-voltage DC (HVDC) connections enable integration of wind power plants located very far from shore. The decoupled AC offshore grid comprises multiple WT converters, and the voltage magnitude and frequency is primarily controlled by the offshore high ...
Gomis Bellmunt, Oriol, Prieto Araujo, Eduardo, Ratés Palau, Sergi, Schönleber, Kevin   +3 more
core   +2 more sources

A method for locating fault sections of power optical communication network intelligent operation and maintenance equipment off-grid based on Dijkstra algorithm

Dianxin kexue, 2023
In order to determine the mapping relationship between the off grid fault section and the fault current distribution, and find the shortest path between the off grid fault section and the fault current distribution, an off grid fault section location ...
Hailong ZHANG, Bo LI, Najuan JIA
doaj   +2 more sources

An adaptive reclosing scheme for flexible DC grid based on residual voltage S-transformation

Scientific Reports
When a fault occurs on a line, it is necessary to quickly isolate the fault to improve the safety and reliability of the transmission system. Due to the lack of effective ability to identify the nature of faults, the traditional automatic reclosing ...
Yue Dai, Hongchun Shu, Na An, Yutao Tang, Yiming Han   +4 more
doaj   +1 more source