IET Nanodielectrics最新文献

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Experimental Study on Creeping Flashover Characteristics Along Dielectric Surfaces in Oil-Filled Transformer Using Electro-Optic Coupling Method 用电光耦合方法研究充油变压器介质表面蠕变闪络特性
IF 3.8
IET Nanodielectrics Pub Date : 2025-04-15 DOI: 10.1049/nde2.70004
Lei Yao, Jianan Weng, Muzi Li, Maomao Zhang
{"title":"Experimental Study on Creeping Flashover Characteristics Along Dielectric Surfaces in Oil-Filled Transformer Using Electro-Optic Coupling Method","authors":"Lei Yao,&nbsp;Jianan Weng,&nbsp;Muzi Li,&nbsp;Maomao Zhang","doi":"10.1049/nde2.70004","DOIUrl":"https://doi.org/10.1049/nde2.70004","url":null,"abstract":"<p>Winding deformations and insulation dampness are the two main causes for the creeping flashover along the dielectric surfaces of oil-immersed power transformers, which could lead to main insulation failures and explosions. In this paper, these two types of insulation defects are modelled by evaluating creeping discharge tests due to moisture dripping and local electric field enhancement in a transformer protype. The completed creeping process along the dielectric interface, from partial discharge initiation to eventual flashover, was observed using an SLR camera and electro-optical coupled sensors. The results indicate that the evolution of the two types of discharges can be divided into four stages, that is, initial weak discharge at the tip of the high voltage side, appearance of carbonised traces at the tip, strong arc discharge in the gap between the high and low voltage sides and eventual flashover. Creeping discharges caused by insulation dampness grow faster than that caused by winding deformations, in terms of discharge intensity and carbonised pressboard areas. Therefore, the more serious surface discharge phenomenon under the condition of insulation and humidity in this paper is mainly caused by the more obvious space charge accumulation brought by low-density areas such as bubbles.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revitalising DC-Aged Silicone Rubber Composites: Hybrid-Silica/Alumina Triumph Over Multi-Stress Ageing 再生直流老化硅橡胶复合材料:混合二氧化硅/氧化铝战胜多应力老化
IF 3.8
IET Nanodielectrics Pub Date : 2025-02-23 DOI: 10.1049/nde2.70003
Rahmat Ullah, Israr Ullah, Rizwan Ahmed, Alistair Reid, Manu Haddad
{"title":"Revitalising DC-Aged Silicone Rubber Composites: Hybrid-Silica/Alumina Triumph Over Multi-Stress Ageing","authors":"Rahmat Ullah,&nbsp;Israr Ullah,&nbsp;Rizwan Ahmed,&nbsp;Alistair Reid,&nbsp;Manu Haddad","doi":"10.1049/nde2.70003","DOIUrl":"https://doi.org/10.1049/nde2.70003","url":null,"abstract":"<p>In this study, various concentrations of high-temperature vulcanised silicone rubber composites filled with nano/micro silica and alumina were manufactured. In this work, all test specimens were subjected to a variety of environmental stresses as well as DC voltage for 5000 h. Then, different diagnostic methods were used to look at the changes that happened on their surfaces and in their bulk properties. These included hydrophobicity classification, X-ray photoelectron spectroscopy (XPS) analysis, Fourier transform infrared spectroscopy (FTIR) analysis, thermogravimetric analysis (TGA) analysis, leakage current analysis and mechanical strength analysis. The composite with 2% nano silica and 10% micro alumina had the smoothest surface and the best hydrophobicity (HC-3). It also had the lowest leakage current (3.1 μA), the least amount of strength loss (31.3%), and good thermal stability compared to the other samples that were studied. Aged samples show a considerable increase in the concentration of the O element and a significant drop in the proportion of the Si component relative to the virgin specimen, which points to the oxidation of chemical bonds during HTV SR and their composites during ageing but with different concentrations. However, two samples (SP2 and SP3) showed comparatively lower concentrations of oxygen degradation in Si contents. This can be attributed to the strong molecular interaction between the fillers and the base matrix.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and characterisation of Cu 0.5 Mg 0.5 Fe 2 O 4 ${text{Cu}}_{mathbf{0.5}}{text{Mg}}_{mathbf{0.5}}{text{Fe}}_{mathbf{2}}{mathbf{O}}_{mathbf{4}}$ nanoparticles doped with cadmium by co-precipitation method for acetonitrile, acetone, and ethanol gas detection with deep learning-based methods Cu 0.5 Mg 0.5 Fe 2 O 4 ${text{Cu}}_{mathbf{0.5}}{text{Mg}}_{mathbf{0.5}}{text{Fe}}_{mathbf{2}}{mathbf{O}}_{mathbf{4}}$掺杂纳米粒子的合成与表征镉共沉淀法用于乙腈、丙酮和乙醇气体的深度学习检测
IF 3.8
IET Nanodielectrics Pub Date : 2025-02-14 DOI: 10.1049/nde2.70001
Alireza Ghasemi, Mohsen Ashourian, Gholam Reza Amiri
{"title":"Synthesis and characterisation of \u0000 \u0000 \u0000 \u0000 Cu\u0000 0.5\u0000 \u0000 \u0000 Mg\u0000 0.5\u0000 \u0000 \u0000 Fe\u0000 2\u0000 \u0000 \u0000 O\u0000 4\u0000 \u0000 \u0000 ${text{Cu}}_{mathbf{0.5}}{text{Mg}}_{mathbf{0.5}}{text{Fe}}_{mathbf{2}}{mathbf{O}}_{mathbf{4}}$\u0000 nanoparticles doped with cadmium by co-precipitation method for acetonitrile, acetone, and ethanol gas detection with deep learning-based methods","authors":"Alireza Ghasemi,&nbsp;Mohsen Ashourian,&nbsp;Gholam Reza Amiri","doi":"10.1049/nde2.70001","DOIUrl":"https://doi.org/10.1049/nde2.70001","url":null,"abstract":"<p>In this study, a magnetic disk was prepared using nanoparticles with a diameter of less than 15 nm. The morphological and structural characteristics of these nanoparticles were systematically examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and alternating force gradient magnetometry (AGFM). XRD analysis confirmed that the average diameter of the copper–magnesium ferrite nanoparticles doped with cadmium was approximately 12 nm, consistent with TEM results, which also showed uniform particle distribution and a tendency to form clusters in powdered form. AGFM measurements revealed that the magnetic property of the powder sample was 15.83 emu/g, which increased to 22.70 emu/g after compression, highlighting the influence of particle density and morphology on magnetic behaviour. Gas sensing tests demonstrated that the fabricated sensors achieved exceptional sensitivity, particularly to acetonitrile, with a maximum sensitivity of 92.3%. A hybrid deep learning model, Bi-LSTM, was utilised to enhance the precision of gas classification. The proposed methodology was benchmarked against traditional machine learning models, including LSTM and RNN, and demonstrated superior performance. The accuracy of gas detection reached an impressive 99.89%, as validated by ROC analysis, underscoring the efficacy of the deep learning-based approach. These findings highlight the potential of cadmium-doped ferrite nanoparticles for high-performance gas sensing applications, suitable for both industrial and medical uses.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Trace-level fuel contaminant detection using an ultrasensitive HC-photonic crystal fibre sensor 使用超灵敏的hc -光子晶体光纤传感器进行痕量燃料污染物检测
IF 3.8
IET Nanodielectrics Pub Date : 2025-02-04 DOI: 10.1049/nde2.12096
Md. Galib Hasan, Ariyan Haque Joy, A. H. M. Iftekharul Ferdous, Kayab Khandakar, Khalid Sifulla Noor, Ahmed Nabih Zaki Rashed
{"title":"Trace-level fuel contaminant detection using an ultrasensitive HC-photonic crystal fibre sensor","authors":"Md. Galib Hasan,&nbsp;Ariyan Haque Joy,&nbsp;A. H. M. Iftekharul Ferdous,&nbsp;Kayab Khandakar,&nbsp;Khalid Sifulla Noor,&nbsp;Ahmed Nabih Zaki Rashed","doi":"10.1049/nde2.12096","DOIUrl":"https://doi.org/10.1049/nde2.12096","url":null,"abstract":"<p>Fuel adulteration involving the illicit mixing of substances such as kerosene and diesel with petrol poses significant risks to engine performance, environmental safety and consumer health. This paper presents a novel HC-PCF sensor designed to accurately detect and identify adulterants in petroleum-based fuels with unprecedented sensitivity and selectivity. The proposed HC-PCF sensor features a unique circular core structure surrounded by a carefully engineered square cladding region, enabling highly sensitive detection of refractive index changes caused by the presence of adulterants. Through rigorous numerical simulations and optimisation, our design achieves remarkable maximum relative sensitivities of 98.56%, 98.95%, and 99.32% for petrol, kerosene, and diesel, respectively, outperforming many previously reported techniques. A comprehensive analysis of the sensor's performance reveals an ultra-low confinement loss of 4.08 × 10<sup>−10</sup> dB/m, 1.08 × 10<sup>−13</sup> dB/m, and 2.95 × 10<sup>−12</sup> dB/m and effective material loss of 0.0040 cm<sup>−1</sup>, 0.0036 cm<sup>−1</sup>, and 0.0034 cm<sup>−1</sup>, highlighting its exceptional light-guiding capabilities and sensitivity. The sensor's high responsiveness facilitates the detection of even trace levels of adulterants by capturing minute refractive index variations as low as possible, enabling real-time monitoring and timely intervention in adulteration incidents. The proposed HC-PCF sensor exhibits high selectivity, precisely targeting the refractive index signatures of fuels, ensuring accurate detection even in complex chemical environments. Its compact size and robust design make it suitable for deployment in various fuel quality control applications, from transportation to industrial settings. Overall, this work introduces cutting-edge HC-PCF sensor technology that addresses the critical need for reliable fuel adulteration detection with unparalleled sensitivity and selectivity, contributing to enhanced product quality, consumer protection, and environmental sustainability in the energy sector.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on optimisation methods for production processes of composite insulator sheath and GRP rod 复合绝缘子护套和玻璃钢棒生产工艺优化方法研究
IF 3.8
IET Nanodielectrics Pub Date : 2025-02-01 DOI: 10.1049/nde2.70000
Haowen Luo, Sida Zhang, Li Cheng, Zhiyi Li
{"title":"Study on optimisation methods for production processes of composite insulator sheath and GRP rod","authors":"Haowen Luo,&nbsp;Sida Zhang,&nbsp;Li Cheng,&nbsp;Zhiyi Li","doi":"10.1049/nde2.70000","DOIUrl":"https://doi.org/10.1049/nde2.70000","url":null,"abstract":"<p>Water diffusion significantly contributes to the abnormal heating in composite insulators. At the same time, the material performance shortcomings caused by the composite insulator production process can further increase water diffusion. To optimise the production process of composite insulators to prevent or reduce such abnormal heating, the fillers of the composite insulator sheath and the production of glass-fibre-reinforced plastic (GRP) rods are analysed. Based on the water absorption model of the sheath and the fibre infiltration model of the rod, it is identified that the flame retardant particle size is a factor that affects the water absorption of the sheath, whereas the epoxy resin liquid viscosity and the fibre volume fraction are factors that affect the porosity of the GRP rod. The experimental results show that the use of modified large-particle-size flame retardants can reduce the water absorption rate of the sheath, whereas low-viscosity liquids and high-fibre volume fractions can reduce the porosity of the GRP rod. The sheath and GRP rod produced using the optimised process continue to meet the standards.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation of metal–organic framework nanosheets with electron-rich groups for SO2 adsorption 富电子基金属有机骨架纳米片的制备及其对二氧化硫的吸附
IF 3.8
IET Nanodielectrics Pub Date : 2025-01-10 DOI: 10.1049/nde2.12095
Hongsong Lian, Jin Huang, Yonghua Lai, Huixin Liu, Dongsheng Zheng, Song Xiao, Hongye Yuan
{"title":"Preparation of metal–organic framework nanosheets with electron-rich groups for SO2 adsorption","authors":"Hongsong Lian,&nbsp;Jin Huang,&nbsp;Yonghua Lai,&nbsp;Huixin Liu,&nbsp;Dongsheng Zheng,&nbsp;Song Xiao,&nbsp;Hongye Yuan","doi":"10.1049/nde2.12095","DOIUrl":"https://doi.org/10.1049/nde2.12095","url":null,"abstract":"<p>Metal–organic frameworks (MOFs), as a new type of porous crystalline materials, hold great promise for gas purification in electrical insulation equipment, especially for the selective capture of SO<sub>2</sub> produced from the decomposition of SF<sub>6</sub>. However, challenges remain in the design and synthesis of MOF-based adsorbents with salient SO<sub>2</sub> adsorption performance due to the limited effective interactions with SO<sub>2</sub> molecules. This study reports the successful direct synthesis of two-dimensional (2D) MOFs nanosheets coordinated by Zr<sup>4+</sup> and tridentate carboxylic organic ligands with nitrogen-containing electron-rich groups within the organic ligands. The resulting MOF nanosheets exhibit enhanced interactions with SO<sub>2</sub> molecules due to the spatial location and electronic properties of the nitrogen groups, thereby conducing to the adsorption of SO<sub>2</sub>. Additionally, by precisely controlling the positioning of nitrogen groups, the Zr-BTB-NH<sub>2</sub> (BTB-NH<sub>2</sub>: 1,1′:3′,1″-Terphenyl]-4,4″-dicarboxylic acid, 3,3″-diamino-5′-(3-amino-4-carboxyphenyl) and Zr-TPY (TPY: 4′-(4-carboxyphenyl)-[2,2′:6′,2″-terpyridine]-5,5″-dicarboxylic acid) MOFs synthesised in this study achieve differentiated SO<sub>2</sub> adsorption capacities of 39.3 cm³·g⁻<sup>1</sup> and 66.3 cm³·g⁻<sup>1</sup>, respectively, surpassing those of several previously reported MOFs. This strategy provides a novel design strategy for developing efficient SO<sub>2</sub> absorbents and lays a foundation for the further development of absorbents promising for gas remediation in electrical insulation equipment.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Monitoring high-temperature sensor with optical performance using graphene in power plant industries 利用石墨烯在电厂工业中监测光学性能的高温传感器
IF 3.8
IET Nanodielectrics Pub Date : 2025-01-10 DOI: 10.1049/nde2.12094
Hadi Sharifi, Aslan Nouri Moqadam, Omid Mohsen Daraei, Ali Pourziad, Mohammad Bemani
{"title":"Monitoring high-temperature sensor with optical performance using graphene in power plant industries","authors":"Hadi Sharifi,&nbsp;Aslan Nouri Moqadam,&nbsp;Omid Mohsen Daraei,&nbsp;Ali Pourziad,&nbsp;Mohammad Bemani","doi":"10.1049/nde2.12094","DOIUrl":"https://doi.org/10.1049/nde2.12094","url":null,"abstract":"<p>Optical sensors getting widespread usage in almost every field, especially industries. A high thermal optical sensor is proposed to predict the environmental temperature in power plants. A high sensitivity, accuracy, low cost, compact size, linear operation, and suitable transmission coefficient optical sensor in a wide thermal range is achieved that changing the surrounding temperature has a severe effect on the conductivity of graphene which changes the transmission power of the sensor. In this paper, the position of the graphene sheet affects the interaction of light and graphene, effectively. A maximum sensitivity of 17.47% is achieved in <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>500</mn>\u0000 </mrow>\u0000 <annotation> $mathbf{500}$</annotation>\u0000 </semantics></math> K temperature deviation. The Cylindrical diameter is 4.1 lambda, the smallest in size among the references checked and has the desired performance up to 2000 K, indicating the suitable efficiency of the sensor and the fibre optic sensor with graphene coating has great potential in the field of measurement, especially in the temperature of the surrounding atmosphere in the industry.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"8 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal analysis of mineral oil-based nanofluids of distribution transformers exposed to simultaneous current and voltage harmonics 同时电流和电压谐波作用下配电变压器矿物油基纳米流体的热分析
IF 3.8
IET Nanodielectrics Pub Date : 2024-12-07 DOI: 10.1049/nde2.12093
Ali Abdali, Kazem Mazlumi, Abbas Rabiee
{"title":"Thermal analysis of mineral oil-based nanofluids of distribution transformers exposed to simultaneous current and voltage harmonics","authors":"Ali Abdali,&nbsp;Kazem Mazlumi,&nbsp;Abbas Rabiee","doi":"10.1049/nde2.12093","DOIUrl":"https://doi.org/10.1049/nde2.12093","url":null,"abstract":"<p>The exact thermal evaluation of distribution transformers (DTs), which are critical and costly pieces of equipment for the power grids, may contribute to preventing the respective failures. Therefore, the present study non-uniformly investigated DT for correct anticipation of hotspot temperature (HST). Optical fibre sensors (OFSs) were applied for assessing our newly developed non-uniform 3D computational fluid dynamic (CFD)-based modelling while performing the temperature rise test (TRT). It should be noted that this new 3D CFD-based thermal analysis showed an error percentage of 0.11% (0.1°C) in comparison to the OFS measurement, reflecting the ideal efficiency and accuracy of the model. Moreover, thermography for both top-oil temperature (TOT) and bottom-oil temperature (BOT) was employed to validate the results from non-uniform 3D (three-dimensional) CFD-based thermal evaluations. The results indicated an acceptable level of relationship between thermography and thermal analysis of 3D CFD at the specified two spots, with an error percentage of &lt;0.65%, demonstrating the acceptable accuracy of the new non-uniform 3D CFD-based model. In the following, yet importantly, the new non-uniform 3D model was subjected to the total harmonic distortions (THD) for the current and voltage of 5%, 10%, and 15%, which raised the HST more than the original model without harmonics by 3.3°C, 7.1°C, and 10.3°C, respectively. Ultimately, different mineral oil-based nanofluids’, such as multi-walled carbon nanotubes (MWCNTs) and diamond nanoparticles, influence on the HST decrement of DT in simultaneous current and voltage harmonics was investigated.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"7 4","pages":"226-240"},"PeriodicalIF":3.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12093","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing power transformer health assessment through dimensional reduction and ensemble approaches in Dissolved Gas Analysis 溶解气体分析中采用降维和集合方法加强电力变压器健康评估
IF 3.8
IET Nanodielectrics Pub Date : 2024-11-08 DOI: 10.1049/nde2.12092
Abdelmoumene Hechifa, Saurabh Dutta, Abdelaziz Lakehal, Hazlee Azil Illias, Arnaud Nanfak, Chouaib Labiod
{"title":"Enhancing power transformer health assessment through dimensional reduction and ensemble approaches in Dissolved Gas Analysis","authors":"Abdelmoumene Hechifa,&nbsp;Saurabh Dutta,&nbsp;Abdelaziz Lakehal,&nbsp;Hazlee Azil Illias,&nbsp;Arnaud Nanfak,&nbsp;Chouaib Labiod","doi":"10.1049/nde2.12092","DOIUrl":"https://doi.org/10.1049/nde2.12092","url":null,"abstract":"<p>Transformer health analysis using Dissolved Gas Analysis is crucial for diagnosing power transformer faults. This paper proposes an innovative approach to diagnose power transformer faults by integrating machine learning algorithms with Ensemble techniques. The method involves fusing reduced dimensional input features through Principal Component Analysis with Ensemble techniques such as Bagging, Decorate, and Boosting. Various machine learning algorithms, including Decision Tree (DT), K-Nearest Neighbours, Radial Basis Function Network, and Support Vector Machine, are employed in conjunction with Ensemble techniques. The long short-term memory algorithm was used to create synthetic data to solve the issue of data imbalance. A dataset of 683 samples is used in the study for training, testing, validation, and comparison with current techniques. The results highlight the effectiveness of Ensemble techniques, particularly Boosting, which demonstrates superior performance across all classification algorithms. The Boosting with DT algorithm achieves an impressive accuracy of 98.32%, surpassing alternative methods. In validation, the proposed Boosting Ensemble technique outperforms various approaches, showcasing its diagnostic accuracy and superiority over alternative methods. The research emphasises the model's effectiveness in smoothing input vectors, enhancing harmony with ensemble techniques, and overcoming limitations in prior methods.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"7 4","pages":"321-333"},"PeriodicalIF":3.8,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and optimization of photonic crystal fibre THz bio-sensor for extremely impressible identification of dengue 用于登革热极敏感识别的光子晶体光纤太赫兹生物传感器设计与优化
IF 3.8
IET Nanodielectrics Pub Date : 2024-10-29 DOI: 10.1049/nde2.12091
Abu Hena Mohammad Iftekharul Ferdous, Mohammad Rasel Miah, Khalid Sifulla Noor, Mohammad Asaduzzaman, Mohammad Azizul Haque, Mosammot Momtahina Bani, Diponkar Kundu, Mohammad Feroz Ali
{"title":"Design and optimization of photonic crystal fibre THz bio-sensor for extremely impressible identification of dengue","authors":"Abu Hena Mohammad Iftekharul Ferdous,&nbsp;Mohammad Rasel Miah,&nbsp;Khalid Sifulla Noor,&nbsp;Mohammad Asaduzzaman,&nbsp;Mohammad Azizul Haque,&nbsp;Mosammot Momtahina Bani,&nbsp;Diponkar Kundu,&nbsp;Mohammad Feroz Ali","doi":"10.1049/nde2.12091","DOIUrl":"https://doi.org/10.1049/nde2.12091","url":null,"abstract":"<p>The detection of human diseases is a major application for biosensors. During this work, a 2D photonic crystal fibre (PCF) biosensor design for dengue virus detection has been suggested. This work presents the decagonal hollow core PCF-based dengue virus bio-sensor and quantitatively investigates it over the terahertz regime. The suggested biosensor's performance is assessed using COMSOL Multiphysics, a professional tool that uses the Finite Element Method. The simulation's outcomes show that the suggested sensor performed better than earlier research, with a high sensitivity of 98.79%, 97.96%, 97.71%, 98.58%, 96.99% and 97.47% with more less confinement loss 1.2766 × 10<sup>−12</sup> dB/m, 1.6385 × 10<sup>−12</sup> dB/m, 2.8015 × 10<sup>−13</sup> dB/m, 1.1798 × 10<sup>−13</sup> dB/m, 7.0336 × 10<sup>−12</sup> dB/m and 0.00 dB/m respectively for infected Haemoglobin (Hgb), Normal Haemoglobin (Hgb), Infected Platelets (Plt), Normal Platelets (Plt), Infected Plasma (Psm) and Normal Plasma (Psm) at 3.0 THz using the ideal geometric configuration. Very soon, its remarkable sensitivity and guiding capabilities will be crucial to dengue virus detection technology.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"7 4","pages":"307-320"},"PeriodicalIF":3.8,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12091","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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