Results 41 to 50 of about 25,394,445 (190)

Determination of transformer performance index based on dissolved gas analysis [PDF]

, 2010
Dissolved Gas Analysis (DGA) is the single most widely used and most effective test to determine transformer’s operation conditions. The detection of gases generated in the transformer is the first available indication of the transformer malfunction ...
Md. Zain, Zainol Alam
core  

Mass Spectrometry in Authentication and Forensic Approaches for Determining the Origin of Hazardous Chemicals

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Identification of a chemical agent yields insights into its physicochemical properties. By examining the intrinsic characteristics and environment of a compound, information about its history can be gathered. The main objective of authentication/forensic approaches to chemicals is to trace the history of the compound's origin, regardless of ...
Carla Orlandi, Grégoire Delaporte, Christine Albaret, Emmanuel Joubert, Anne Bossée, Emilien L. Jamin, Laurent Debrauwer   +6 more
wiley   +1 more source

Feature Selection and Classification of Transformer Faults Based on Novel Meta-Heuristic Algorithm

Mathematics, 2022
Detecting transformer faults is critical to avoid the undesirable loss of transformers from service and ensure utility service continuity. Transformer faults diagnosis can be determined based on dissolved gas analysis (DGA).
El-Sayed M. El-kenawy, Fahad Albalawi, Sayed A. Ward, Sherif S. M. Ghoneim, Marwa M. Eid, Abdelaziz A. Abdelhamid, Nadjem Bailek, Abdelhameed Ibrahim   +7 more
doaj   +1 more source

Evaluation Methodology, Numerical Verification and Retrofilling Procedure for Power Transformers to Ensure K‐Class Flame Retardancy and Environmentally Friendly

High Voltage, EarlyView.
ABSTRACT With increasing demands for fire safety and environmental friendliness, retrofilling transformers with alternative insulating liquids has become a growing trend. However, retrofilling power transformers remains uncertain, as more residual mineral oil compromises K‐class flame retardancy, and its impact on environmental performance has yet to ...
Zhenfu Tang, Yihua Qian, Dan Zhou, Wei Hu, Feipeng Wang, Yang Xu   +5 more
wiley   +1 more source

ANALISIS KONDISI TRANSFORMATOR DAYA 20KV/150KV DENGAN METODE UJI DISSOLVED GAS ANALYSIS (DGA) DI PT.PJB PLTU REMBANG [PDF]

, 2021
Permasalahan yang umum terjadi pada transformator saat beroperasi adalah timbulnya gas yang terlarut dalam minyak transformator yang disebut dengan fault gas .Fault gas ini timbul karena akibat dari kegagalan transformator yang dipicu dari kenaikan ...
Tohari, Muhamad, Sukoco, Budi, Haddin, Muhammad   +2 more
core  

Analisis Kualitas Isolasi Minyak Transformator 375 MVA dengan Interpretasi Rasio Roger, Segitiga Duval, Breakdown Test, dan Water Content Test

Teknik, 2019
Transformator merupakan peralatan utama dalam pemasokan listrik dari unit pembangkitan menuju konsumen. Oleh karena itu, perlu perhatian khusus dalam pemeliharaan kinerja transformator agar tidak terjadi kerusakan pada transformator.
Abdul Syakur, Wildan Lazuardi
doaj   +1 more source

Diffusion of Characteristic Gases in Oil‐Immersed Transformer by Computational Fluid Dynamics Simulation and Experimental Verification

High Voltage, EarlyView.
ABSTRACT The complex diffusion of characteristic gases within oil‐immersed transformers significantly influences the timeliness between the fault occurrence and gas detection. So far, the gas transport processes and spatio‐temporal distributions remain inadequately understood.
Chunpeng Li, Yuan Li, Jianyi Wang, Zhengqin Zhou, Zhihao Liu, Zhiqiu Chen, Dongyang Zheng, Guanjun Zhang   +7 more
wiley   +1 more source

Power Transformer Fault Diagnosis Based on Dissolved Gas Analysis by Correlation Coefficient-DBSCAN

Applied Sciences, 2020
The transformers work in a complex environment, which makes them prone to failure. Dissolved gas analysis (DGA) is one of the most important methods for oil-immersed transformers’ internal insulation fault diagnosis.
Yongxin Liu, Bin Song, Linong Wang, Jiachen Gao, Rihong Xu   +4 more
doaj   +1 more source

Dissolved Gas Analysis and Application of Artificial Intelligence Technique for Fault Diagnosis in Power Transformers: A South African Case Study

Energies, 2022
In South Africa, the growing power demand, challenges of having idle infrastructure, and power delivery issues have become crucial problems. Reliability enhancement necessitates a life-cycle performance analysis of the electrical power transformers.
Bonginkosi A. Thango
doaj   +1 more source

Influence of Dissolved Oxygen on the Gassing Tendency of Biodegradable Insulating Liquids Under Thermal and Electrical Faults

High Voltage, EarlyView.
ABSTRACT Dissolved gas analysis (DGA), widely used for fault diagnosis, can be significantly influenced by the presence of oxygen. Oxygen not only accelerates fluid degradation but also alters the type and concentration of fault gases generated, potentially leading to misinterpretation of transformer conditions if conventional DGA models are applied ...
Moïse Agouassi, U. Mohan Rao, Issouf Fofana, Yazid Hadjadj, Fethi Maghnefi   +4 more
wiley   +1 more source