IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第2页

Editorial Condition Monitoring and Diagnostics of Electrical Insulation 电气绝缘的编辑状态监测和诊断

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-12-20 DOI: 10.1109/TDEI.2024.3496012

Marek Florkowski;Cheng Pan

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IEEE Transactions on Dielectrics and Electrical Insulation Publication Information IEEE电介质与电绝缘学报

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-12-20 DOI: 10.1109/TDEI.2024.3497460

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A Practice of Sensory Cooperation for Insulation Diagnosis of Electrical Apparatus: Probabilistic Identification and Risk Assessment

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-12-11 DOI: 10.1109/TDEI.2024.3515920

Kai Wang;Ming Ren;Chongxing Zhang;Ming Dong

{"title":"A Practice of Sensory Cooperation for Insulation Diagnosis of Electrical Apparatus: Probabilistic Identification and Risk Assessment","authors":"Kai Wang;Ming Ren;Chongxing Zhang;Ming Dong","doi":"10.1109/TDEI.2024.3515920","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3515920","url":null,"abstract":"In this study, a set of algorithms is tailored to achieve insulation defect probability identification and risk assessment based on multiphysical detections of partial discharges (PDs). Initially, three types of PD detection units are integrated into the flange to achieve a relatively uniform detection distance. Also, the synchronous PD detection platform is constructed based on intelligent sensor units, achieving extraction of sequential PD impulse information. Then, the multiphysics energy release power (ERP) is extrapolated based on the amplitude of the measurement signal amplitude. Also, three ERP values are normalized to analyze the proportional relationship of energy releases at different stages of discharge, which is further mapped in a ternary power pattern. In addition, we develop a probability recognition model based on the ternary error-correcting output coding (ECOC) united with a support vector machine (SVM). Meanwhile, by introducing discharge data of the same type with different defect scales, it can be verified that the proposed model possesses significant robustness. Besides, Gaussian process regression (GPR) is applied to fit the relationship between the ternary power pattern and apparent discharge energy (ADE). Also, the risk index and risk level are defined based on the temporal information of ADE during the entire discharge process, which is incorporated with the pulse repetition rate to achieve the visualization of discharge risk assessment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"55-62"},"PeriodicalIF":2.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Condition Diagnosis of Composite Insulator Based on Knowledge Graph

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-12-02 DOI: 10.1109/TDEI.2024.3510219

Hua Jin;Yufang Zhang;Yuxuan Jia;Zhikang Yuan;Youping Tu

{"title":"Condition Diagnosis of Composite Insulator Based on Knowledge Graph","authors":"Hua Jin;Yufang Zhang;Yuxuan Jia;Zhikang Yuan;Youping Tu","doi":"10.1109/TDEI.2024.3510219","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3510219","url":null,"abstract":"Composite insulators have been widely used in power transmission system for the lightweight, high strength, and great hydrophobicity. However, the aging of the polymers in composite insulators is a key issue affecting the reliable operation, posing challenges for the condition diagnosis of composite insulators. Knowledge graph is an emerging technique for structuring existing experience and knowledge, which shows promising prospects on maintenance efficiency enhancement for composite insulators. This article introduces the condition diagnosis approach for composite insulators based on knowledge graph. First, the annotated corpus of composite insulator was constructed based on the technical reports, handbooks, open published articles, and standards. This work defined nine types of entities and nine types of relations. Then, the a lite bidirectional encoder representations from transformer (ALBERT)–bidirectional long short-term memory (BiLSTM)–conditional random field (CRF) model and the ALBERT-bidirectional gated recurrent unit (BiGRU)–attention model are employed to realize the entities and relations recognition and the <inline-formula> <tex-math>${F}1$ </tex-math></inline-formula> scores of which reach 92.49% and 92.36%, respectively, exhibiting better performance than any other models. At last, the first knowledge graph on composite insulator was constructed. There are 820 entity-relation–entity triplets, covering the basic information, environmental conditions, test methods, fault mechanisms, and so on. This work will provide an artificial intelligence tool for condition diagnosis of composite insulators.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"28-35"},"PeriodicalIF":2.9,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Partial Discharge Aging of Epoxy Insulation at Different High-Frequency Pulse Parameters and Environmental Stresses

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-19 DOI: 10.1109/TDEI.2024.3502581

Xingyu Shang;Lei Pang;Qinhao Bu;Qiaogen Zhang

{"title":"Partial Discharge Aging of Epoxy Insulation at Different High-Frequency Pulse Parameters and Environmental Stresses","authors":"Xingyu Shang;Lei Pang;Qinhao Bu;Qiaogen Zhang","doi":"10.1109/TDEI.2024.3502581","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3502581","url":null,"abstract":"The voltage stress on high-frequency transformers (HFTs) features higher levels of repetition frequency, operating voltage, voltage dV/dt, and grid voltage superposition, which challenges the epoxy insulation of HFTs exposed to partial discharges (PDs). Wide ranges of voltage parameters (frequency, voltage, rising edge, and dc bias) and environmental stresses (temperature, humidity, gas, and pressure) are applied to the sphere-gap-insulation-plate structure for PD aging analysis. New patterns are found in this study. For example, the shape of the rising edge affects the lifetime, and the influences of humidity and dc bias are nonmonotonic. Surface charge decay and voltage dV/dt have key effects on the discharge pattern. Early failures with pulse frequencies of 50 and 100 kHz are attributed to the interaction of humidity and electric field. The erosion rate is lower at oxygen-free ambient, while higher with CO2 gas. PD parameters (PD number, PD amplitude, PD delay, PD ignition voltage, and PD frequency) and phase-resolved PD (PRPD) patterns are measured with the ultrahigh-frequency (UHF) method and discussed for all aging conditions. Cumulative PD amplitude and cumulative PD energy have a good correlation to experimental lifetime values. However, due to the transition of the PD regime, the fit model has less explainability on the influence of voltage, humidity, gas, and pressure on the lifetime, which is rarely revealed before.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"45-54"},"PeriodicalIF":2.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accelerated Laboratory Aging of Synthetic Ester Dielectric Liquid

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-18 DOI: 10.1109/TDEI.2024.3501995

Veronika Haramija;Dijana Vrsaljko;Vedran Ðurina;Domagoj Vrsaljko

{"title":"Accelerated Laboratory Aging of Synthetic Ester Dielectric Liquid","authors":"Veronika Haramija;Dijana Vrsaljko;Vedran Ðurina;Domagoj Vrsaljko","doi":"10.1109/TDEI.2024.3501995","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3501995","url":null,"abstract":"Synthetic esters are liquids used in the lubricant industry, but also in the electrical industry for insulation and heat transfer. In this work, the synthetic ester is exposed to high temperatures to initiate and propagate the degradation reactions, study the degradation process, and investigate the effect of paper and water on thermal degradation. After 672 h of thermal exposure, there is no sludge, but the color of the samples is significantly changed. Fourier transform infrared spectroscopy (FTIR) is used to assess the occurrence of degradation products, the neutralization value is used to determine the total acidity, and the relative permittivity is used to correlate the influence of degradation products on the dielectric properties of the synthetic ester. Nuclear magnetic resonance (NMR) and color analysis are used to investigate the appearance and composition of the degradation products of seven selected samples. The NMR study shows that the change observed in the FTIR spectra, the neutralization value, and the relative permittivity as a function of aging conditions correspond very well with the size and shape of the 1 H NMR peak of 3.51 ppm, confirming that the formation of alcohols, ethers, and cross-links is responsible for the aging of the ester. It is found that the color change is misleading when it comes to the degradation of the synthetic ester dielectric liquid.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"367-374"},"PeriodicalIF":2.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effects of Thermo-Oxidative Aging on the Dielectric Property and Electrical Breakdown of Epoxy Resin Using in High-Voltage Equipment

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-18 DOI: 10.1109/TDEI.2024.3501997

Xiaoxiao Kong;Chong Zhang;H. S. Du;H. Miyake;Y. Tanaka;Boxue Du

{"title":"Effects of Thermo-Oxidative Aging on the Dielectric Property and Electrical Breakdown of Epoxy Resin Using in High-Voltage Equipment","authors":"Xiaoxiao Kong;Chong Zhang;H. S. Du;H. Miyake;Y. Tanaka;Boxue Du","doi":"10.1109/TDEI.2024.3501997","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3501997","url":null,"abstract":"In this article, the effects of thermo-oxidative aging on the dielectric properties of epoxy resin are investigated at 180 °C under different durations. In the early stage of aging (0–168 h), the dielectric properties of epoxy resin are slightly improved, which are characterized by the reduction of dielectric loss and conductivity and the slightly enhancement of breakdown strength. These are attributed to the molecular rearrangement and postcuring reactions inside the epoxy resin, as evidenced by the improved glass transition temperature. With the continuous increase of thermal aging time, oxidative decomposition and scission reactions start to dominate. The cross-linked network of epoxy resin is gradually destroyed, leading to the increase of carrier quantity and the reduction of trap energy level and density. The dielectric polarization and charge injection are intensified, while the partial discharge initiation voltage (PDIV) and breakdown strength are decreased significantly. After aging for 1440 h, the conductivity could be increased by 59.64%, and the breakdown strength is decreased by 18.14%. The insulation performance of epoxy resin is determined by the competition results of the molecular rearrangement, postcuring, and oxidative cleavage reactions during thermal aging, which could provide a theoretical basis for the aging assessment of epoxy resin for high-voltage applications.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"254-262"},"PeriodicalIF":2.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acoustic Emission and Propagation Characteristics of Metal Particles in GIS

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-15 DOI: 10.1109/TDEI.2024.3499895

Hao Liu;Wei-Xing Han;Zhen-Xing Fan;Ji-Hang Sun;Wei-Qi Qin;Xiang-Dong Liao;Si-Han Wang;Guo-Ming Ma

{"title":"Acoustic Emission and Propagation Characteristics of Metal Particles in GIS","authors":"Hao Liu;Wei-Xing Han;Zhen-Xing Fan;Ji-Hang Sun;Wei-Qi Qin;Xiang-Dong Liao;Si-Han Wang;Guo-Ming Ma","doi":"10.1109/TDEI.2024.3499895","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3499895","url":null,"abstract":"Metal particle pollution was one of the significant factors that endangered the reliability of the gas-insulated switchgears (GISs). The detection of metal particles in GIS was crucial for ensuring the safe operation of GIS. This article established a calculation model for the cut-off frequency of acoustic emission (AE) generated by the metal particle collision with the GIS enclosure. The effects of metal particle materials, the Gaussian equivalent radius, and the bounce heights on the cut-off frequency of the AE signal were obtained. Through the AE measurement experiments of metal particle colliding with an aluminum plate, the accuracy of the cut-off frequency calculation model was verified. Besides, the experiment confirmed that the propagation mode of the AE signal on GIS enclosure was primarily the S0 mode Lamb wave. The attenuation of the AE signal was analyzed. The geometric attenuation and the energy loss attenuation were determined as the primary attenuation processes. A calculation model for the attenuation of AE signal was established. Based on this, the variation of the cut-off frequency after propagation on the GIS enclosure was clarified. The AE and propagation characteristic proposed in this article provided guidance for optimizing the frequency band of ultrasonic sensors and setting up the measurement points.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"20-27"},"PeriodicalIF":2.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Molecular Thermodynamic Evaluation of Various Cu-Doped ZIF-8 Ratios for SF6 Catalysis

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-11 DOI: 10.1109/TDEI.2024.3495588

Fuping Zeng;Kexin Zhu;Langlang Lv;Guangzhi Chen;Hua Jiang;Zichun Xue;Ju Tang

{"title":"Molecular Thermodynamic Evaluation of Various Cu-Doped ZIF-8 Ratios for SF6 Catalysis","authors":"Fuping Zeng;Kexin Zhu;Langlang Lv;Guangzhi Chen;Hua Jiang;Zichun Xue;Ju Tang","doi":"10.1109/TDEI.2024.3495588","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3495588","url":null,"abstract":"SF6 is a greenhouse gas with strong greenhouse effect. How to rationally deal with waste SF6 has become an extensive research topic for scholars at home and abroad. Studies have shown that ZIF-8 has certain superiority as a catalyst, while metal doping in ZIF-8 may promote its catalytic ability. In this article, the undoped ZIF-8 model and the Cu-doped ZIF-8 model (Zn:Cu =1:5; Zn:Cu =3:3) were constructed, and the most stable adsorption structures of SF6 at three typical sites were obtained based on density-functional theory (DFT), with the 6-membered ring (6MR) window as the optimal adsorption site. The stable adsorption energy was the largest in the Zn:Cu =5:1 doped model (−98.352 kcal/mol), and during the adsorption process, the SF6 molecular bond lengths changed most drastically, and even the bond breaking phenomenon appeared. The catalytic ability of the Zn:Cu =3:3 doping model was in between that of the ZIF-8 and Zn:Cu =1:5 doping models. The results of the Mulliken charge transfer and the HOMO-LUMO energy level showed that in the Zn:Cu =5:1 doping model, the Cu atom can both transfer a large number of electrons (−0.606 e) to SF6 and enhance the ability of Zn atoms to lose electrons, effectively weakening the S-F bond strength of SF6 gas molecules and thus promoting SF6 gas molecule catalysis. The highest occupied molecular orbital (HOMO) wave function in the system is mainly distributed around the doped Cu atoms, the energy gap is significantly reduced, and the catalyst reactivity is enhanced.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"408-415"},"PeriodicalIF":2.9,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insulation Failure Mechanism of Polyimide Under High-Frequency Electrical Stress: A Synergistic Analysis of Aging Experiments and Molecular Dynamics Simulations

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-11-01 DOI: 10.1109/TDEI.2024.3489602

Yiwei Wang;Huangkuan Xu;Bilal Iqbal Ayubi;Shengrui Zhou;Li Zhang

{"title":"Insulation Failure Mechanism of Polyimide Under High-Frequency Electrical Stress: A Synergistic Analysis of Aging Experiments and Molecular Dynamics Simulations","authors":"Yiwei Wang;Huangkuan Xu;Bilal Iqbal Ayubi;Shengrui Zhou;Li Zhang","doi":"10.1109/TDEI.2024.3489602","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3489602","url":null,"abstract":"Polyimide (PI), an insulating material extensively employed in high-frequency power transformers, encounters accelerated insulation deterioration under high-frequency electrical stress. This study elucidates the insulation failure process of PI under high-frequency electrical stress by employing a combined approach of aging experiments and reactive force field molecular dynamics (ReaxFF MDs) simulation, with scanning electron microscopy (SEM) analysis and Fourier transform infrared spectroscopy (FTIR) used. The investigation reveals that the primary causes of PI insulation failure are partial discharge (PD) erosion and electrothermal aging. PD progressively erodes the PI surface, with the erosion intensity initially intensifying before diminishing over the material’s lifespan. The synergistic impact of electrothermal stress instigates the fracture of various chemical bonds within PI molecules. These include the C-H and C-N bonds in the imide ring and C-C bonds connecting the imide structure to the benzene ring, leading to the generation of gaseous byproducts like CO and H2 O. Concurrently, the rupture of the C-O–C bond between the benzene ring and the disintegration of the imine ring result in the main chain’s fragmentation. This process leads to the continual degradation and recombination of molecular chains with varying polymerization degrees and a small hydrocarbon product C2 H2 is produced. The influence of electrical stress on PI’s molecular configuration manifests in the alteration of the electric dipole moment and the elongation of polar bonds, notably the C-N bond in the imine ring, which rapidly fractures under electric heating stress.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"246-253"},"PeriodicalIF":2.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0