IEEE Transactions on Dielectrics and Electrical Insulation最新文献_第9页

A New Nondestructive Aging Characterization Method for Oil-Paper Insulation Based on the Transmission Characteristics of Complementary Split Ring Resonator 基于互补分环谐振器传输特性的油纸绝缘无损老化表征新方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-10 DOI: 10.1109/TDEI.2024.3457742

Mi Xiao;Gaoyan Yang;Wei Zhang

{"title":"A New Nondestructive Aging Characterization Method for Oil-Paper Insulation Based on the Transmission Characteristics of Complementary Split Ring Resonator","authors":"Mi Xiao;Gaoyan Yang;Wei Zhang","doi":"10.1109/TDEI.2024.3457742","DOIUrl":"10.1109/TDEI.2024.3457742","url":null,"abstract":"A novel method is proposed for the simple nondestructive characterization of the aging degree of oil-paper insulation materials based on a complementary split ring resonator (CSRR) in this article. Samples of oil-paper insulation are aged under different circumstances by accelerated thermal aging experiment. After that, the traditional characterization methods such as the acid value of insulating oil, the polymerization degree of insulating paper, the Raman spectra test of the insulating oil, microscopic characterization of insulating paper, and dielectric constant of the samples are tested to characterize the aging degree of the samples. In order to find a new way to make the characterization more convenient, microstrip line sensors with CSRR are prepared, and the resonant frequency deviation (<inline-formula> <tex-math>$Delta {f},$ </tex-math></inline-formula>) of the sensor loaded with insulating oil and insulating cardboard samples before and after aging are tested to show the effect of aging time and temperature on the aging degree. The experimental results show that the method proposed in this article can reflect the aging trend of oil-paper insulation to a certain extent.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"334-341"},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212870","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

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-10 DOI: 10.1109/TDEI.2024.3457594

Zhihang Zhao;Zhen Wang;Zemin Duan;Yangyang Fu

{"title":"Dynamical Similarity of Streamer Propagation in Geometrically Similar Combined Air Gaps","authors":"Zhihang Zhao;Zhen Wang;Zemin Duan;Yangyang Fu","doi":"10.1109/TDEI.2024.3457594","DOIUrl":"10.1109/TDEI.2024.3457594","url":null,"abstract":"Similarity methods are useful tools for correlating gas discharge characteristics at different dimensional scales, which aid in designing tests using reduced models for extrapolating original full-dimensional scale discharges that are either experimentally expensive or practically unachievable. In this article, based on a 2-D fluid model, we investigated the validity of similarity laws for streamer propagation in combined air gaps, which have a floating metal structure between the high voltage and ground electrodes. The dynamic similarities of high-pressure streamer propagation inside combined air gaps are demonstrated by keeping the product of geometrical length and gas pressure constant in the original and downscaled gaps. The streamer propagation represented by the electron source term and the streamer velocity in single and combined gaps are obtained and compared, which also confirms the influence of floating metal on streamer characteristics. Temporal behaviors of the streamer propagation represented by the electron density distributions are found to be rather the same, which validates the dynamic streamer similarity. In addition, the simulation results show that similarity properties could be undermined by the photoionization effect whereas its impact can be excluded if the quenching pressure of the photoionization source term is linearized. By further excluding the nonlinear processes, such as the three-body electron attachment process, similarity laws are more rigorously verified. The results from this study confirm the applicability of similarity laws for streamer discharge in combined air gaps under designed conditions, which are beneficial for the exploration and conduction of downscaled aircraft ground tests for simulating lightning strike effects.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"1017-1026"},"PeriodicalIF":2.9,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212992","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

Nanosecond Current Waveforms With Small Discharge Gaps in Needle-Plane Electrode Over Three Kinds of Polymer Film 针平面电极在三种聚合物薄膜上的纳秒级电流波形与小放电间隙

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-09 DOI: 10.1109/TDEI.2024.3456104

Tatsuki Okamoto;Hiroaki Uehara

{"title":"Nanosecond Current Waveforms With Small Discharge Gaps in Needle-Plane Electrode Over Three Kinds of Polymer Film","authors":"Tatsuki Okamoto;Hiroaki Uehara","doi":"10.1109/TDEI.2024.3456104","DOIUrl":"10.1109/TDEI.2024.3456104","url":null,"abstract":"The nanosecond partial discharge (PD) currents have become increasingly important with the recent development of large power modules used in automobile drive mechanisms and other high-temperature equipment. Those modules are sometimes operated at frequencies higher than normal power frequencies, making it crucial to analyze the PD characteristics at these elevated frequencies. Measuring PD characteristics with a small gap, less than <inline-formula> <tex-math>$100~mu $ </tex-math></inline-formula> m, has also become essential due to system compactization. PD currents typically flow in a few tens of nanoseconds; hence, the wire length of the current measurement circuit should be sufficiently short. The electrode system employed in this study consists of a simple needle-plane electrode with small discharge gaps of 0, 12.5, 25, 50, 75, 100, and <inline-formula> <tex-math>$150~mu $ </tex-math></inline-formula> m. The needle diameter is 1 mm with a tip radius of <inline-formula> <tex-math>$300~mu $ </tex-math></inline-formula> m. The total length of the PD current-flow circuit is set to be less than approximately 150 mm. We measure nanosecond PD pulse current waveforms using a digital oscilloscope with an ac peak voltage of 2000 V at 50–1000 Hz. PD current forms were observed over polyimide (PI), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN) films, widely used as insulating films. The PD current waveforms over PI, PET, and PEN films exhibited approximately 5 ns peak time for both positive and negative pulses, with a pulsewidth time at half height of the peak value ranging from about 5–15 ns. These times vary depending on the material kind and discharge gap length. The frequency dependence of those times showed little change over applied voltage frequencies. Moreover, new time-domain NMR analyses correlate the current waveform differences with the dipole movement affected by the trapped charges.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 1","pages":"375-382"},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212898","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

Trap Distribution and Along-Surface Discharge Characterization of Aromatic Compound-Modified Silicone Gel 芳香族化合物改性硅凝胶的俘获分布和沿表面放电表征

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-09 DOI: 10.1109/TDEI.2024.3456096

Jian Wang;Wei Wu;Yuxuan Song;Chengzhi Hou;Hanwen Ren;Rakhmonov Ikromjon Usmonovich;Qingmin Li

{"title":"Trap Distribution and Along-Surface Discharge Characterization of Aromatic Compound-Modified Silicone Gel","authors":"Jian Wang;Wei Wu;Yuxuan Song;Chengzhi Hou;Hanwen Ren;Rakhmonov Ikromjon Usmonovich;Qingmin Li","doi":"10.1109/TDEI.2024.3456096","DOIUrl":"10.1109/TDEI.2024.3456096","url":null,"abstract":"Insulated gate bipolar transistor (IGBT) module is prone to the along-surface discharge at the silicone gel-metal electrode-AlN ceramic substrate, that is, the “triple bonding point,” resulting in insulation breakdown, so it is important to develop high-performance silicone gel. In this article, the composite materials with different contents of 4,4’-dichlorobenzophenone (DCBP) are prepared and their trap distribution and along-surface discharge characteristics are investigated. The results show that the introduction of DCBP reduces the density of deep trap, increases the density of shallow trap and the degree of crosslinking, is more conducive to the detrapping and migration of charge, and accelerates the attenuation of the surface potential of the composite. Under the condition of sinusoidal voltage of 7 kV and frequency of 10 kHz, the composite material can effectively inhibit the development of the along-surface discharge compared with PSG, and the total discharge times are reduced by 65.08%, 48.71%, and 18.27%, respectively. The total discharge range decreases by 69.15%, 62.87%, and 22.88%, and the average discharge range decreases by 25.61%, 27.63%, and 5.64%, respectively. The release of ultraviolet energy during along-surface discharge excites DCBP to a triplet state, promotes the improvement of crosslinking degree and the generation of new re-crosslinking products, prevents the growth of local low-density insulation region, and further inhibits the occurrence of the along-surface discharge, which enhances the insulation performance of the composite.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"823-832"},"PeriodicalIF":2.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212871","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

Small-Sample GIS Partial Discharge-Type Identification Method Based on Fusion of 1-D AT-DRSN and IDRN Models 基于一维 AT-DRSN 和 IDRN 模型融合的小样本 GIS 部分放电类型识别方法

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-06 DOI: 10.1109/TDEI.2024.3455314

Baiqiang Yin;Yahong Zeng;Ruoyu Wang;Lei Zuo;Bing Li;Zhen Cheng

{"title":"Small-Sample GIS Partial Discharge-Type Identification Method Based on Fusion of 1-D AT-DRSN and IDRN Models","authors":"Baiqiang Yin;Yahong Zeng;Ruoyu Wang;Lei Zuo;Bing Li;Zhen Cheng","doi":"10.1109/TDEI.2024.3455314","DOIUrl":"10.1109/TDEI.2024.3455314","url":null,"abstract":"Different types of partial discharges (PDs) in gas-insulated switchgear (GIS) cause different degrees of GIS insulation damage, and correct PD identification is critical to GIS insulation status. This article proposes a multimodel fusion PD pattern recognition method based on 1-D adaptive transfer deep residual shrinkage network (AT-DRSN) and improved deep residual network (IDRN), which fully utilizes PD time-domain waveform images generated from field inspection. First, the finite-difference time-domain (FDTD) method and mathematical models are used to simulate GIS PDs, and the time-domain waveform image datasets of four typical PD defects are established. Second, the network model is built based on time-domain feature sequences and time-order feature parameters, respectively, and effectively combined with the transfer learning method, and finally, the AT-DRSN and IDRN models are weighted and fused for PD pattern recognition. The results show that the model proposed in this article can effectively achieve high-precision diagnosis of small-sample GIS PDs, with a recognition accuracy of 98.3%, and the accuracy under strong noise is still greater than 95%, which has higher accuracy and anti-interference performance compared with other methods and is of reference value for small-sample PD recognition in the field.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"877-886"},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212873","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 Property of Cylindrical Cavity Discharge in Power Cable 电力电缆中圆柱腔放电的声发射特性

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-06 DOI: 10.1109/TDEI.2024.3455321

Pengfei Wang;Hongjuan Zhang;Pengwei Guo;Juan Chen;Yan Gao;Yu Wang;Baoquan Jin

{"title":"Acoustic Emission Property of Cylindrical Cavity Discharge in Power Cable","authors":"Pengfei Wang;Hongjuan Zhang;Pengwei Guo;Juan Chen;Yan Gao;Yu Wang;Baoquan Jin","doi":"10.1109/TDEI.2024.3455321","DOIUrl":"10.1109/TDEI.2024.3455321","url":null,"abstract":"The acoustic emission property and transient process of cylindrical cavity discharge is comprehensively modeled and validated for power cable in this article. An electrostatic field model is established to analyze the discharge duration and power density varying with discharge magnitude and cylindrical cavity height. The relationship between the acoustic source and PD activity is constructed through discharge power density and duration. Furthermore, a transient model for acoustic wave propagation in a multilayer power cable is established. Numerical analysis with finite element analysis is conducted to analyze the effects of different discharge magnitudes under the same cavity height and different cavity heights under the same discharge magnitude on the acoustic waves at the surface of the power cable. The simulation reveals that higher discharge magnitude results in greater intensity of the acoustic wave and longer cavities result in lower acoustic frequencies. Ultimately, a series of validation experiments are implemented to acquire the statistical acoustic characteristics. The intensity of acoustic wave is positively correlated with the discharge magnitude in R-square of 0.9895, while the frequency is negatively correlated with cavity height in R-square of 0. 9589.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 5","pages":"2701-2710"},"PeriodicalIF":2.9,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212872","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

Influence of 16–30-kHz Sinusoidal Voltage on Surface Discharge Characteristics at Different Pressures 16 kHz-30 kHz 正弦电压对不同压力下表面放电特性的影响

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-05 DOI: 10.1109/TDEI.2024.3454565

Tianwei Wang;She Chen;Entong Xu;Yaoxun Zhao;Feng Wang;Qiaopo Xiong;Gen Long

{"title":"Influence of 16–30-kHz Sinusoidal Voltage on Surface Discharge Characteristics at Different Pressures","authors":"Tianwei Wang;She Chen;Entong Xu;Yaoxun Zhao;Feng Wang;Qiaopo Xiong;Gen Long","doi":"10.1109/TDEI.2024.3454565","DOIUrl":"10.1109/TDEI.2024.3454565","url":null,"abstract":"Due to the specific communication requirements of high-altitude platforms, such as research institutes and monitoring stations in mountainous areas, as well as aircraft, voltage sources operating within very low-frequency (VLF) range (specifically between 16 and 30 kHz) are frequently utilized. High-frequency and high-voltage conditions increase the risk of surface discharge, posing a significant threat to the normal operation of high-voltage equipment. The existing insulation designs often refer to power frequency test results under low-pressure conditions, which often lead to insulation failures. Previous research has primarily focused on the effects of power frequency or voltage below 2 kHz on insulation characteristics at atmospheric pressure. In this work, we have built an insulation test platform to conduct surface discharge experiments at both power frequency and VLF. The pressure range is 20–60 kPa. The surface discharge inception voltage (SDIV) and breakdown voltage (BDV) of epoxy resin and polytetrafluoroethylene (PTFE) boards are investigated under highly nonuniform fields. The experimental results show that the SDIV of epoxy resin under VLF voltage is lower than that at 50 Hz, while PTFE exhibits a similar SDIV under different frequencies. Both insulation materials exhibit significantly lower BDV at VLF compared to those at 50 Hz. As the pressure decreases, both the SDIV and BDV decrease. Furthermore, we have analyzed how pressure and frequency affect surface discharge in insulation boards by means of the equivalent capacitance-resistance model and ion transport model. This study provides a reference for the insulation design of high-voltage power supplies for VLF communication equipment under low-pressure conditions.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"32 2","pages":"833-840"},"PeriodicalIF":2.9,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212874","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

Discharge Characteristics of Roof Insulators in Strong Wind and Sand Environment: A Review 强风和风沙环境下屋顶隔热材料的放电特性：综述

IF 2.9 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-04 DOI: 10.1109/TDEI.2024.3454210

Chenguang Yang;Yujun Guo;Zhipeng Shi;Bingkun Li;Xueqin Zhang;Song Xiao;Guangning Wu

{"title":"Discharge Characteristics of Roof Insulators in Strong Wind and Sand Environment: A Review","authors":"Chenguang Yang;Yujun Guo;Zhipeng Shi;Bingkun Li;Xueqin Zhang;Song Xiao;Guangning Wu","doi":"10.1109/TDEI.2024.3454210","DOIUrl":"10.1109/TDEI.2024.3454210","url":null,"abstract":"There is frequent sandstorm weather in the northwest of China. Roof insulator is exposed to strong wind and sand environment for a long time. A large amount of sand will be deposited on the surface, resulting in a reduction of insulation strength along the insulator surface and a gap between the sheds. Also, affected by the abrasive action of sand, the roof insulator surface hydrophobicity decreases, which is easy to trigger the insulator flashover, threatening the safety of train operation. For this purpose, this article reviews the sand charging mechanism, sand accumulation characteristics, surface discharge characteristics, air-gap breakdown characteristics, flashover characteristics of the insulator, and the effects of surface abrasion on the insulation performance in wind and sand environment. Based on the train operating conditions, future research directions are proposed to be carried out. First, it is necessary to study the sand accumulation characteristics of roof insulators under multifactor coupling and establish a simulation model that reflects the distribution and content of sand. Secondly, it is necessary to carry out research on the flashover characteristics of real roof insulators and higher speed wind and sand environments, and to build the quantitative relationship between wind speed, sand particle size, sand concentration and the gap breakdown voltage. Finally, a method to evaluate the abrasion state of insulator surfaces needs to be proposed, as well as to explore new materials and structures for roof insulators in strong wind and sand environment.","PeriodicalId":13247,"journal":{"name":"IEEE Transactions on Dielectrics and Electrical Insulation","volume":"31 6","pages":"3231-3242"},"PeriodicalIF":2.9,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212875","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

A Novel Fast Coupled Algorithm for Analyzing the Dynamic Behavior of the Bubble in the Transformer Oil under the Electric Field 用于分析变压器油中气泡在电场作用下动态行为的新型快速耦合算法

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-03 DOI: 10.1109/tdei.2024.3453786

Yanxin Ren, Nana Duan, Yulu Fan, Xinyu Ma, Weijie Xu, Shuhong Wang

引用次数: 0

Random distribution and adsorption characteristics of metal particles and visualization algorithm for DC GIS/GIL 金属颗粒的随机分布和吸附特性以及直流 GIS/GIL 的可视化算法

IF 3.1 3区工程技术

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2024-09-03 DOI: 10.1109/tdei.2024.3454014

Yutong Zhang, Luming Xin, Chenbin Jin, Zehua Wu, Shengwu Tan, Jianwei Wei, Peng Liu, Zongren Peng

引用次数: 0