IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第7页

Ultrasonic Testing of Glass Fiber-Reinforced Polymer Composites Used in High-Voltage Insulating Components 高压绝缘元件用玻璃纤维增强聚合物复合材料的超声检测

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-10-10 DOI: 10.1109/TDEI.2024.3478132

Aleksandra Ziaja-Sujdak;Tomasz Nowak;Chau Hon Ho;Pawel Bobrowski

{"title":"Ultrasonic Testing of Glass Fiber-Reinforced Polymer Composites Used in High-Voltage Insulating Components","authors":"Aleksandra Ziaja-Sujdak;Tomasz Nowak;Chau Hon Ho;Pawel Bobrowski","doi":"10.1109/TDEI.2024.3478132","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3478132","url":null,"abstract":"Due to their high strength-to-weight ratio and good dielectric properties fiber-reinforced polymers have gained significant interest in different industrial fields, including the automotive, aerospace, and energy sectors. Despite this attention, the evaluation of the properties of polymer-based composite components, both as part of post-manufacturing control and in-service checks, remains challenging. In this article, ultrasonic testing is investigated as a nondestructive approach for the quality evaluation of high-voltage composite insulators. Classical phase array ultrasonic testing is compared with the total focusing method. The results are validated using computed tomography and a destructive testing approach. It was demonstrated that the proposed ultrasonic testing (UT) technique detected microcracks and small voids in the analyzed samples similar to the reference testing approaches. It was also proved that the water immersion total focusing method can be successfully implemented in a full-scale production process if the scanning and data analysis tasks are properly automated. Since the pilot solution was developed to evaluate objects with relatively simple shapes, further work is needed to cope with more complex geometries.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"83-91"},"PeriodicalIF":2.9,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106455","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

Comparison of Initial Voltage Distributions in Layer and Disc Type Power Transformer Windings 层式和盘式电力变压器绕组初始电压分布的比较

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-10-07 DOI: 10.1109/TDEI.2024.3473893

Bartłomiej Adamczyk;Piotr Pająk;Marek Florkowski

{"title":"Comparison of Initial Voltage Distributions in Layer and Disc Type Power Transformer Windings","authors":"Bartłomiej Adamczyk;Piotr Pająk;Marek Florkowski","doi":"10.1109/TDEI.2024.3473893","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3473893","url":null,"abstract":"Power transformers are subjected to surge overvoltages which can lead to failure of the windings insulation system. The amplitude of the overvoltages in the windings is dependent on the parameters of the surge voltage (duration, waveform, steepness, etc.) and the design of the windings, thus various winding designs perform differently when surge voltage is applied to their terminals. The transformer winding vulnerability to surge phenomena can be estimated based on the initial voltage distribution. In practice, the initial voltage distribution can be improved by increasing the series or decreasing the ground capacitance of the winding, by design changes, or by application of electrostatic shields. This article presents the analysis of the initial voltage distributions in power transformer windings, comparing layer and disk designs. The analysis was done based on the results of measurements of surge voltage waveforms in real-scale winding models, while a lightning impulse is applied to their terminals. The experimental analysis was extended by simulations of the electrostatic potential distribution in the winding models, and the influence of selected factors (shielding, interleaving turns) on the initial voltage distribution was analyzed and discussed. The article is focused on the comparison of initial voltage distribution in transformer windings of disk and layer designs based on quantitative and qualitative analysis.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"73-82"},"PeriodicalIF":2.9,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106322","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

Detection of SF₆ Decomposition Components H₂S and CO₂ Based on WDM and CRDS 基于WDM和CRDS的SF₆分解组分H₂S和CO₂检测

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-10-03 DOI: 10.1109/TDEI.2024.3472002

Haonan Lv;Xinran Zhang;Anhao Jiang;Wenchao Qian;Chaohai Zhang;Xiaoxing Zhang

{"title":"Detection of SF₆ Decomposition Components H₂S and CO₂ Based on WDM and CRDS","authors":"Haonan Lv;Xinran Zhang;Anhao Jiang;Wenchao Qian;Chaohai Zhang;Xiaoxing Zhang","doi":"10.1109/TDEI.2024.3472002","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3472002","url":null,"abstract":"H2S and CO2 are the SF6 decomposition components indicative of severe partial discharge (PD) faults and decomposition of organic insulation materials in partial over thermal (POT) faults, and their detection requires methods with high sensitivity and the capability for long-term online monitoring. In this article, wavelength division multiplexing (WDM) and cavity ring-down spectroscopy (CRDS) were combined to achieve the synchronous and accurate detection of H2S/CO2, which was executed by multiplexing the optical paths of two distributed feedback (DFB) lasers in the 1578/1600 nm wavelength band. To avoid instrument redundancy, a self-developed high-precision laser diode controller (LDC) board was implemented for the current and temperature modulation of dual-laser. By combining the CO2/H\u0000<inline-formula> <tex-math>$_{mathbf {2}}$ </tex-math></inline-formula>\u0000S wavelength band with a high absorption coefficient ratio at 1600 nm, which is less interfered with by other components, and the 1578 nm wavelength band, the sensitivity of the CO\u0000<inline-formula> <tex-math>$_{mathbf {2}}$ </tex-math></inline-formula>\u0000 detection was improved compared with that of the single-beam CRDS system. Utilizing Allan variance analysis for system limit of detection (LoD) analysis, the system achieves a LoD of 0.02/0.31 ppmv (volume fraction \u0000<inline-formula> <tex-math>$1times 10^{text {-6}}$ </tex-math></inline-formula>\u0000) for H2S/CO2 within 28 s. Compared to existing absorption spectroscopy techniques, the detection error of the system for H2S/CO2 is 3.4%/2.4%, with both sensitivity and time efficiency at an advantageous level.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"2922-2929"},"PeriodicalIF":2.9,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859334","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

Dissolved Gas Analysis for Power Transformer Fault Diagnosis Based on Deep Zero-Shot Learning 基于深度零点学习的电力变压器故障诊断中溶解气体分析

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-10-01 DOI: 10.1109/TDEI.2024.3469913

Leixiao Lei;Yigang He;Zhikai Xing

{"title":"Dissolved Gas Analysis for Power Transformer Fault Diagnosis Based on Deep Zero-Shot Learning","authors":"Leixiao Lei;Yigang He;Zhikai Xing","doi":"10.1109/TDEI.2024.3469913","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3469913","url":null,"abstract":"Rapid and accurate fault diagnosis methods of power transformers are essential to ensure power systems’ safe and stable operation. However, the problem of limited fault data and missing data leads to inadequate feature learning, mapping offset, and low accuracy of fault diagnosis. To solve this problem, this study presents a deep zero-shot learning (DZSL) model to diagnose the unseen class fault for the dissolved gas analysis (DGA). First, a specific attribute matrix is presented to build a relationship between fault states and the attribute. Then, the channel-space-time attention network extracts the significant features from the dissolved gas in oil. The multiscale deep residual contraction networks (MDRNs) learn the connection between the attribute matrix and the main features. Finally, the cosine similarity comparison method obtains the transformer fault status. The performance of the proposed model is verified by the measured data of dissolved gas in the oil of the power transformer. The experimental results show that the model has a better performance than other compared methods.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3011-3020"},"PeriodicalIF":2.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859263","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

Surface Electric Field Measurement of Composite Insulator Using an Optical Waveguide Sensor 基于光波导传感器的复合绝缘体表面电场测量

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-10-01 DOI: 10.1109/TDEI.2024.3471744

Jiahong Zhang;Weichang Li;Jiali Shi;Jing Zhang

{"title":"Surface Electric Field Measurement of Composite Insulator Using an Optical Waveguide Sensor","authors":"Jiahong Zhang;Weichang Li;Jiali Shi;Jing Zhang","doi":"10.1109/TDEI.2024.3471744","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3471744","url":null,"abstract":"In this article, an integrated optical waveguide sensor is designed and developed to comprehensively analyze the surface electric field distribution characteristics of composite insulators. Based on the optical waveguide electric field sensor, an experimental system is set up for measuring the axial and radial electric fields along the surface of composite insulators under normal, damaged, and internally defective conditions. The experimental results show that when a 10kV power frequency voltage is connected, the radial and axial electric fields at the low and high voltage (HV) ends of the normal insulator are 21.53, 53.07 kV/m and 47.55, 105.12 kV/m, respectively. When the insulator surface is damaged, the radial and axial electric field intensities at the damaged locations increase by 37.59%–204.85% and 12.89%–32.69%, respectively. When an internal defect occurred, the radial and axial electric fields along the defect area increase by 18% and decrease by 127.72%, respectively. The radial electric field is more affected by the defect. The comparison with the calculation results shows that the integrated optical waveguide electric field sensor has great potential capability to be used for measuring the surface electric field of insulators.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1218-1227"},"PeriodicalIF":2.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783203","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

Prediction of Dissolved Alcohol Concentrations in Transformer Oil and Aging Evaluation of Cellulose Insulation 变压器油中溶解酒精浓度预测及纤维素绝缘老化评价

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-30 DOI: 10.1109/TDEI.2024.3470753

Heng Zhang;Yuan Zhang;Zaijun Jiang;Xianhao Fan;Wen Li;Chuying Liu;Enze Zhang;Thomas Wu;Jiefeng Liu

{"title":"Prediction of Dissolved Alcohol Concentrations in Transformer Oil and Aging Evaluation of Cellulose Insulation","authors":"Heng Zhang;Yuan Zhang;Zaijun Jiang;Xianhao Fan;Wen Li;Chuying Liu;Enze Zhang;Thomas Wu;Jiefeng Liu","doi":"10.1109/TDEI.2024.3470753","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3470753","url":null,"abstract":"Alcohol (methanol and ethanol) markers in transformer oil have progressively played a crucial role in assessing the aging state of cellulose paper. There is a lack of reported studies on the prediction of alcohol concentration in transformer oil. Given this, this work presents an approach that employs an atomic orbit search optimized support vector machine (AOS-SVM) to predict the alcohol concentration. Initially, oil-paper insulation samples are prepared, and the alcohol concentrations are determined. Furthermore, methanol and ethanol concentrations in oil were predicted using AOS-SVM, and the MSE of the prediction results reached 0.0428 and 0.0064, respectively. Eventually, a quantitative model combining methanol, ethanol, and degree of polymerization (DP) was constructed to evaluate the aging of insulating paper, which verified the reliability of the proposed model. In this regard, the proposed method exhibits reliable predictive performance in terms of alcohol concentration in oil, thereby contributing to the effective evaluation of the aging state of insulating paper.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1238-1245"},"PeriodicalIF":2.9,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783251","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

Transient Earth Voltage Sensor Measurements as a Nonintrusive Tool for Partial Discharge Analysis in Switchgears 瞬态接地电压传感器测量作为开关设备局部放电分析的非侵入式工具

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-30 DOI: 10.1109/TDEI.2024.3470755

F. Guastavino;L. Della Giovanna;F. Gallesi;E. Torello

{"title":"Transient Earth Voltage Sensor Measurements as a Nonintrusive Tool for Partial Discharge Analysis in Switchgears","authors":"F. Guastavino;L. Della Giovanna;F. Gallesi;E. Torello","doi":"10.1109/TDEI.2024.3470755","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3470755","url":null,"abstract":"Partial discharges (PDs) are a major cause of electrical stress and insulation failure, but their presence is also a symptom of insulation problems. Online PDs measurement allows for continuous monitoring of the insulation system. An online PDs measurement system for air-insulated switchgear (AIS) is developed, based on transient earth voltage (TEV) sensors, and evaluated for morphological analysis of insulation defects. The evaluation is conducted comparing the developed system with a conventional PD measurement system based on the IEC 60270 standard. The aim of the proposed system is to facilitate its integration with minimal retrofitting and operational disruption assuring the possibility to identify and analyze the defects. A pilot system, employing an AIS, is designed and tested. The results from both the PDs measurement systems are presented and discussed. Furthermore, the impact of a high capacitive load connected to the switchgear is investigated, and the possible effects of a capacitive load due to an MV cable is considered by simulating the realistic cable geometry.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"2930-2937"},"PeriodicalIF":2.9,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859276","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

Improved Dielectric and Energy Storage Performance of BOPP Film by Decreasing Ambient Temperature 降低环境温度可提高BOPP薄膜的介电和储能性能

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-30 DOI: 10.1109/TDEI.2024.3470757

Ke Chen;B. X. Du;Haoliang Liu;Meng Xiao

引用次数: 0

Partial Discharge Characteristics of Polyimide Under the High-Frequency Multilevel Stepped Waveform 聚酰亚胺在高频多级阶梯波形下的局部放电特性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-27 DOI: 10.1109/TDEI.2024.3469157

Ruitao Shao;Jun Jiang;Wu Chen;Zhibang Shen

{"title":"Partial Discharge Characteristics of Polyimide Under the High-Frequency Multilevel Stepped Waveform","authors":"Ruitao Shao;Jun Jiang;Wu Chen;Zhibang Shen","doi":"10.1109/TDEI.2024.3469157","DOIUrl":"https://doi.org/10.1109/TDEI.2024.3469157","url":null,"abstract":"High-power high-voltage high-frequency transformers (H3Ts) have been widely applied in the modular multilevel converter (MMC) due to their high efficiency and flexibility. However, the special electric stress for the insulation is introduced into this type of power converter, that is the high-frequency multilevel stepped waveform stresses generated by the converter’s switching actions. Therefore, it is important to investigate partial discharge (PD) characteristics in H3Ts under the stepped waveform. This article analyses the influence of frequency and voltage level numbers on the PD initial voltage (PDIV) and time-resolved PD (TRPD). Experimental results indicate that PDIV shows a decreasing trend within the frequency range of 10–100 kHz. Moreover, it is observed that the five-level stepped waveform results in a 50% reduction in PD numbers at 10 kHz when compared to the two-level stepped waveform. The space charge movement during platform time induces the production of PD, which is shown as two peaks on the TRPD pattern. These results provide experimental and theoretical support for the diagnosis of PD under MMC stepped waveforms for the application in H3Ts.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1113-1122"},"PeriodicalIF":2.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783204","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

Lambert W Function Applications in Electrical Insulation Engineering 朗伯特W函数在电气绝缘工程中的应用

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-27 DOI: 10.1109/TDEI.2024.3469154

Mariani Daniele;Arturo Popoli;Paolo Seri;Andrea Cavallini;Leonardo Gasperini;Giacomo Selleri;Alberto Rumi;Simone Vincenzo Suraci;Davide Fabiani

引用次数: 0