Results 1 to 10 of about 306,257 (169)

Weighted Minkowski distance-based differential protection for active distribution networks considering the uncertainty of frequency-domain characteristics

Frontiers in Energy Research, 2023
With the increasing use of DGs (distributed generators) in the power system, the distribution network is becoming more and more complicated. The rapid change of DG output power and the diversity of DG location make the computing calculation of relay ...
Wei Jin, Wei Jin, Jian Li, Shuo Zhang, Mengqiang Feng, Shiguang Feng   +5 more
doaj   +1 more source

Research on differential protection of low frequency transmission lines based on differential principle of sampling values

Zhejiang dianli, 2023
As a fault occurs in a low-frequency transmission line zone， the modular multilevel matrix converters （M3Cs） at both ends of the line limit the fault current amplitude and phase.
PAN Wulue, QIAN Zhengxu, SUN Zhipan, HONG Feng, CAO Wenbin, WANG Song, FANG Yudong   +6 more
doaj   +1 more source

Impact of large-scale photovoltaic-energy storage power generation system access on differential protection of main transformer under symmetrical faults

Frontiers in Energy Research, 2023
The low voltage ride-through (LVRT) requirements demand large-scale photovoltaic (PV) power generation system remain connected to the grid during faults. It results in considerable impact on the characteristics of fault current.
Guosheng Yang, Jiaqi Zhang, Hao Zhang, Congbo Wang, Yujia Zhu, Xiaolong Chen   +5 more
doaj   +1 more source

A Novel Differential Protection Scheme for Distribution Lines Under Weak Synchronization Conditions Considering DG Characteristics

IEEE Access, 2023
A large number of DGs(distributed generators) in the ADN (active distribution network) bring great uncertainty to the power systems, making it difficult to quantify fault characteristics.
Wei Jin, Shuo Zhang, Jian Li, Mengqiang Feng, Shiguang Feng, Yuping Lu   +5 more
doaj   +1 more source

An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study

Energies, 2022
Differential protection normally detects short circuits and ground faults in the windings of a power transformer and its terminals. Inter-turn faults refer to flashovers among the electrodes that arise only in a similar type of physical winding.
Muhammad Sheryar, Muhammad Ahsan Ali, Farhana Umer, Zeeshan Rashid, Muhammad Amjad, Zunaib Maqsood Haider, Muhammad Omer Khan   +6 more
doaj   +1 more source

Determination of modern reliability indicators of relay protection and automation devices

Известия высших учебных заведений: Проблемы энергетики, 2023
RELEVANCE. The reliability of power supply to consumers depends on the reliability of all elements of the power supply system, including relay protection and automation devices (RZiA).
A. V. Vinogradov, A. A. Lansberg, Yu. D. Volchkov, A. V. Vinogradova   +3 more
doaj   +1 more source

Research on Differential Protection of Generator Based on New Braking Mode

Energies, 2021
In view of the difficulties in coordination between reliability and sensitivity of conventional generator differential protection, this paper presents a novel generator differential protection scheme based on a new braking method.
Jingde Xia, Shaozhuo Li, Shuping Gao, Wenquan Shao, Guobing Song, Changjiang Chen   +5 more
doaj   +1 more source

A hybrid intelligent busbar protection strategy using hyperbolic S‐transforms and extreme learning machines

Engineering Reports, 2021
In power systems, busbars connect important components such as generators, transmission lines, and loads. A typical fault occurrence on the busbar may result in the isolation of faulty sections from other normally operating parts of the system resulting ...
Abolfazl Rahimnejad, Milad Gil, Aliakbar Abdoos, S. Andrew Gadsden   +3 more
doaj   +1 more source

Design of Hardware Setup Based on IEC 61850 Communication Protocol for Detection & Blocking of Harmonics in Power Transformer

Energies, 2021
In this paper, the authors have developed a hardware model for blocking even and odd harmonics of a power transformer. In the proposed hardware model, intelligent differential & over-current relays are used for the blocking of harmonics of a power ...
Abdul Azeem, Majid Jamil, Shamimul Qamar, Hasmat Malik, Rayees Ahmad Thokar   +4 more
doaj   +1 more source

HV Transformer Protection and Stabilization under Geomagnetically Induced Currents

Energies, 2020
This paper presents the results of research related to the issues arising from DC excitation of power transformers due to geomagnetically induced currents (GIC). First, the GIC phenomena and their influence on power system operation are discussed.
Daniel Bejmert, Klaus Boehme, Matthias Kereit, Waldemar Rebizant   +3 more
doaj   +1 more source