Results 81 to 90 of about 3,735 (200)

Intelligent Fault Detection of MV/HV Transformers Using Fuzzy Logic Based on DGA

Eng
Dissolved Gas Analysis (DGA) of power system transformers has emerged as one of the most effective transformer health diagnosing tools by analyzing the gases dissolved in the insulating oil.
Lone Larona Mogotsi, Akhtar Rasool, Edwin Matlotse, Sadaqat Ali, Ahmed Ali   +4 more
doaj   +1 more source

DEVELOPMENT OF FUZZY NEURAL NETWORK FOR THE INTERPRETATION OF THE RESULTS OF DISSOLVED IN OIL GASES ANALYSIS

Electrical engineering & Electromechanics, 2017
Purpose. The purpose of this paper is a diagnosis of power transformers on the basis of the results of the analysis of gases dissolved in oil. Methodology. To solve this problem a fuzzy neural network has been developed, tested and trained. Results.
V.Е. Bondarenko, O.V. Shutenko
doaj   +1 more source

Analisa Gas Terlarut pada Minyak Transformator Daya 150 KV dengan Menggunakan Metode Duval Pentagon [PDF]

, 2017
Transformer oil is one of the important components of a transformer, because in addition to its function as an insulator which provides the function of inter-winding insulation inside the transformer, as well as the cooling medium to absorb heat from the
Amalia, D. '. (Devita), Murdiya, F. '. (Fri)   +1 more
core  

Synthesis of Elastic Metallic Nickel by Solvent‐Ligand‐Mediated Reductive Assembly

Advanced Science, Volume 12, Issue 38, October 13, 2025.
The novel elastic metallic nickel, featuring ligands coordinating on the metal surface, is synthesized via rational selection of reduction and structure‐directing organic solvents. Moreover, by modulating solvent composition and incorporating acetic acid ligands, sufficient ligands are enabled to coordinate with the metal surface, thereby improving the
Haiyan An, Guoying Tan, Pingru Su, Yu Long, Deyan He, Yu Tang   +5 more
wiley   +1 more source

Fast Calculation of Transformer Hot Spot Temperature Based on Winding Equivalent Thermal Parameters

High Voltage, Volume 10, Issue 5, Page 1257-1271, October 2025.
ABSTRACT The hot spot temperature of a transformer is one of the critical indicators reflecting its operating status. Accurate and fast calculation of hot spot temperature is significant for the online monitoring of transformers. Considering the low computational efficiency of the transformer’s numerical full model (FM), this paper presents a model ...
Si Chen, Gehao Sheng, Yingting Luo, Junfei Jiang, Xiuchen Jiang   +4 more
wiley   +1 more source

Analysis of aged insulating oil for early detection of incipient fault inside the high voltage equipment [PDF]

, 2013
Ageing of the transformer depends on several factors especially electrical and thermal stresses. Due to which incipient faults occurs which in turn if left undetected will cause deterioration and eventually lead to failure of the transformer.
Hembrom , Shivani
core  

A Dedicated Genetic Algorithm for Two-Dimensional Non-Guillotine Strip Packing [PDF]

, 2007
This paper introduces DGA, a new dedicated genetic algorithm for a two-dimensional (2D) non-guillotine strip packing problem (2D-SPP). DGA integrates two key features: a hierarchical fitness function and a problem-specific crossover operator (WAX for ...
G. Gómez-Villouta, J.K. Hao, J.P. Hamiez   +2 more
core   +5 more sources

Photoallylation Mechanism of Dicyanobenzenes with Allyltrimethylsilane in Solution Investigated by Cold UV and IR Spectroscopy in the Gas Phase

Chemistry – An Asian Journal, Volume 20, Issue 18, September 15, 2025.
The structure of the chemical intermediate in photoallylation of dicyanobenzenes (DCBs) with allyltrimethylsilane (ATMS) in acetonitrile was determined by cold UV and IR spectroscopy in the gas phase. The reaction mechanism was discussed on the basis of the intermediate structure. It was found that the elimination of a CN group from the intermediate is
Ryosuke Goda, Yuma Kitamura, Go Nagamoto, Satoru Muramatsu, Manabu Abe, Yoshiya Inokuchi   +5 more
wiley   +1 more source

An adaptive multi-fuzzy logic model for diagnosing transformer faults using dynamic weight optimization

e-Prime: Advances in Electrical Engineering, Electronics and Energy
Dissolved gas analysis (DGA) is crucial for diagnosing early power transformer failures. Traditional DGA interpretation methods like Duval Triangle, IEC ratio, Roger ratio, Doernenburg ratio and Key Gas are inconsistent and vary in accuracy, especially ...
Kim-Anh Nguyen, Huy Hoang Le, Ba Tu Phung   +2 more
doaj   +1 more source

A Fault Diagnosis Model of Power Transformers Based on Dissolved Gas Analysis Features Selection and Improved Krill Herd Algorithm Optimized Support Vector Machine

IEEE Access, 2019
In this paper, a set of dissolved gas analysis (DGA) new feature combinations is selected as input from the mixed DGA feature quantity, and an improved krill herd (IKH) algorithm optimized support vector machine (SVM) transformer fault diagnosis model is
Yiyi Zhang, Xin Li, Hanbo Zheng, Huilu Yao, Jiefeng Liu, Chaohai Zhang, Hongbo Peng, Jian Jiao   +7 more
doaj   +1 more source