Results 1 to 10 of about 9,150 (262)

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

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

New Hybrid Machine Learning Method for Detecting Faults in Three-Phase Power Transformers

Energies, 2022
A novel hybrid machine learning technique is proposed for the protection of three-phase power transformers in this study. Here, the developed model was tested across several types of current signal fault cases from different fault conditions and examined
Othman Abdusalam, Alasmer Ibrahim, Fatih Anayi, Michael Packianather   +3 more
doaj   +1 more source

Efficient practical method for differential protection of power transformer in the presence of the fault current limiters

IET Generation, Transmission & Distribution, 2023
The algorithms of the present generation of practical differential relays are based on two methods. The first method is based on the ratio of the harmonic content of the differential current, and the second one is based on the length of the time interval
Ali Sahebi, Hossein Askarian‐Abyaneh, Seyed Hossein Hesamedin Sadeghi, Haidar Samet, Om Parkash Malik   +4 more
doaj   +1 more source

Evaluation of Filtered Spark Gap on the Lightning Protection of Distribution Transformers: Experimental and Simulation Study

Energies, 2020
Protection of transformers, as one of the most expensive equipment in the power system, against lightning overvoltage impulses is a vital task. This paper, for the first time so far, investigates the effects of a filtered spark gap on the protection ...
Mahdi Pourakbari-Kasmaei, Farhan Mahmood, Michal Krbal, Ludek Pelikan, Jaroslava Orságová, Petr Toman, Matti Lehtonen   +6 more
doaj   +1 more source

Primary Current Test Method for Transformer Protection Based on Transient Load

Zhongguo dianli, 2021
When test load is insufficient, the current transformer (TA) secondary circuit test by primary current cannot be completed, which often results in the failure of new transformer protection to be put into normal operation.
Jiyin SHI
doaj   +1 more source

A new criterion for inter-turn short-circuit fault recognition for new energy grid-connected transformer

电力工程技术, 2022
In order to increase the transmission capacity of the new energy grid-connected transformer,a two-voltage three-winding transformer with star-angle-angle connection form is adopted.
XING Wu, GUO Xiao, WANG Zhe, ZHAO Shiyuan   +3 more
doaj   +1 more source

Differential Protection of Transmission Transformer for Large-Scale Doubly-Fed Wind Farms Based on Detrended Analysis

Zhongguo dianli, 2023
Since the fault current output from the doubly-fed wind farm has frequency deviation characteristics and contains large harmonic components, when an internal fault occurs in the transmission transformer for the doubly-fed wind farm, the ratio of the ...
Yanchun XU, Zhongyao FAN, Sihan SUN, Lu MI   +3 more
doaj   +1 more source

Transformer Monitoring and Protection in Dynamic Power Systems – A Review

Frontiers in Energy Research, 2020
Increasing distributed energy resources, especially the renewable energy resources (RESs) are being installed across power systems these years. These RESs, including solar photovoltaic, wind turbines, etc., provide opportunities for operators to improve ...
Boqi Xie, Dongbo Zhao, Tianqi Hong
doaj   +1 more source

Induced Voltages Ratio-Based Algorithm for Fault Detection, and Faulted Phase and Winding Identification of a Three-Winding Power Transformer

Energies, 2014
This paper proposes an algorithm for fault detection, faulted phase and winding identification of a three-winding power transformer based on the induced voltages in the electrical power system.
Byung Eun Lee, Jung-Wook Park, Peter A. Crossley, Yong Cheol Kang   +3 more
doaj   +1 more source