Results 21 to 30 of about 311,533 (268)

A Novel Two-step Distance Protection for Flexible HVDC Transmission Lines [PDF]

E3S Web of Conferences, 2021
DC line fault is one of the key problems that must be solved in a flexible HVDC system. During quite a long time between the existing main protection and backup protection of the HVDC line, there is no line protection method to detect the fault, which ...
Fang Zeya, Wen Minghao, Zheng Junchao, Wen Minghao   +3 more
doaj   +1 more source

Geometry of Distance Protection

CoRR
Distance relays detect faults on transmission lines. They face uncertainty from the fault's location and resistance, as well as the current from the line's remote terminal. In this paper, we aggregate this uncertainty with the Minkowski sum. This allows us to explicitly model the power grid surrounding the relay's line, and in turn accommodate any mix ...
Josh A. Taylor, Alejandro D. Domínguez-García   +1 more
openaire   +2 more sources

Distance protection method applicable to renewable energy grid-connected systems

电力工程技术, 2023
To further improve the performance of distance protection in renewable energy systems, a distance protection method is proposed, which considers the effects of control system and the distributed capacitance effect of the line.
GUI Xiaozhi, SONG Guobing, CHANG Peng, CHANG Zhongxue   +3 more
doaj   +1 more source

An Enhanced Algorithm for Conventional Protection Devices of Transmission Lines With DTLR

IEEE Access, 2021
As the installed capacity of renewable generation continues to increase nowadays to satisfy both emissions and economic requirements, the nature of intermittent generation results in a need to further increase transmission capacity.
Elsaeed Ali, Andrew M. Knight
doaj   +1 more source

Key technologies for relay protection of bulk renewable energy transmission lines

Zhejiang dianli
This paper examines the declining adaptability of conventional relay protection systems caused by large-scale renewable energy integration. A systematic review is conducted on fault characteristics of different renewable energy sources and corresponding ...
LI Zhenxing, YANG Zikang, YANG Guang, WENG Hanli, TAN Hong, WANG Qiujie   +5 more
doaj   +1 more source

A Setting Method of the Second-zone Grounding Distance Protection for 110 kV Lines Applicable to Distributed Wind Power Integration

Zhejiang dianli, 2022
On the 110 kV lines connected to the distributed wind power， following the conventional protection configuration requirements， the distributed wind power side is usually not equipped with protection. However， since the distributed wind power is connected，
ZHANG Anlong, CHENG Yaoyu, HUANG Fuquan, ZENG Xiang, LIU Zijun, QIAN Kun, WEN Minghao   +6 more
doaj   +1 more source

A Streamlined Fault Detection and Selectivity Method Based on a Normalized Current Difference Criterion and Apparent Impedance for Onshore Wind Farm Collector Grids

IEEE Access
The large-scale integration of inverter-based resources (IBRs) has substantially altered the magnitude, phase-angle behavior, and transient evolution of fault currents in modern power systems.
Raphael Toshio Sakai, Silvio Giuseppe Di Santo, Nelson Kagan, Celestino Paulo Tchipongue Kalueyo, Carlos Frederico Meschini Almeida   +4 more
doaj   +1 more source

Serum Myonectin Levels Are Positively Associated With Physical Function and Lower Frailty‐Related Limitation in Maintenance Hemodialysis Patients: A Cross‐Sectional Study

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Maintenance hemodialysis (MHD) patients frequently suffer from frailty, characterized by reduced physical function and poor prognosis. Myokines, such as myonectin, secreted by muscle, are emerging regulators of systemic health. This study investigated the relationship between serum myonectin, adipokines (adiponectin, omentin), and ...
Kenichi Kono, Yoshifumi Moriyama, Koji Ohashi, Naoya Otaka, Minako Tatsumi, Toyoaki Murohara, Noriyuki Ouchi, Satoru Oshima   +7 more
wiley   +1 more source

Transient Impedance Fitting-Based Distance Protection for Transmission Lines with Hybrid Renewable Integration

Energies
The hybrid operation of grid-following (GFL) and grid-forming (GFM) renewable energy units can lead to phase-reference inconsistencies and distorted transient impedance trajectories, which in turn cause maloperation or failure-to-operate of conventional ...
Zhenxing Li, Dawei Cui, Jiaqi Qin, Xinghua Fu, Guang Yang   +4 more
doaj   +1 more source

Low-Latency Distance Protective Relay on FPGA

IEEE Transactions on Smart Grid, 2014
The need for high-speed multi-function protective relays in both traditional transmission systems and the new emerging paradigm of the smart grid is growing. As a widely used protective scheme for transmission lines, a distance relay’s high speed and reliable operation to clear faults is essential.
Yifan Wang, Venkata Dinavahi
openaire   +2 more sources