2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第9页

Electrical Power Dissipation on the Surface of a Ceramic Insulator under Pollution Condition 污染条件下陶瓷绝缘子表面的电功率损耗

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544830

C. Ilomuanya, S. Farokhi, A. Nekahi

{"title":"Electrical Power Dissipation on the Surface of a Ceramic Insulator under Pollution Condition","authors":"C. Ilomuanya, S. Farokhi, A. Nekahi","doi":"10.1109/CEIDP.2018.8544830","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544830","url":null,"abstract":"An investigation is carried out on a contaminated insulator to determine the effects of acid rain pollution on its performance. The polluted insulator is modelled using a Finite Element Analysis (FEA) software. Two cases of pollution condition and one case of unpolluted insulator condition were investigated. When voltage was applied to the insulators, it was observed that higher power dissipation characterized the narrow edges of the insulator as compared to other regions in both cases of pollution. Similarly, high electric field stress was experienced in these regions, confirming that the power dissipated in these parts is directly proportional to the electric field strength. Due to these conditions, these areas become prone to dry band formation and partial discharges (PD). This is not the same for the unpolluted insulator were low power dissipation was observed; implying that the conditions experienced were caused by the pollution. Results from this work are expected to be applied in asset management of high voltage (HV) equipment, in detection of PD and predictive maintenance activities, thereby mitigating insulator flashover resulting from pollution and increase the reliability of power transmission systems and railway catenary networks.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124680605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Development of Selective Sterilization System of Bacteria in Aqueous Solution by High Electric Field Pulse Application 高电场脉冲应用于水溶液细菌选择性灭菌系统的研制

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544760

Y. Murakami, Takunao Sato, Y. Muramoto

引用次数: 1

A Novel Archimedes Spiral Antenna Used for PD Measurement at Repetitive Square Wave Voltages 一种用于重复方波电压下PD测量的新型阿基米德螺旋天线

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544893

Yuanquan Gong, Peng Wang, Wanya Zhou, Jiawei Zhang, A. Cavallini

{"title":"A Novel Archimedes Spiral Antenna Used for PD Measurement at Repetitive Square Wave Voltages","authors":"Yuanquan Gong, Peng Wang, Wanya Zhou, Jiawei Zhang, A. Cavallini","doi":"10.1109/CEIDP.2018.8544893","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544893","url":null,"abstract":"Partial discharge(PD) measurements under repetitive impulsive voltages should be performed on insulation systems of rotating machines fed by voltage converters for type and qualification tests according to International Electrotechnical Commission (IEC) standard. Compared with well-established PD test technologies at sinusoidal voltages, more issues should be considered when PD detection are carried out using repetitive impulsive voltages, because PD pulses coming from the samples and the disturbance coming from impulsive voltage generator often have similar features in both time and frequency domains. Among all PD measurement methods, ultra-high frequency (UHF) technologies are recommended to be used under repetitive impulsive voltage conditions because the UHF sensors with appropriate bandwidth can receive PD energy in high frequency range with high signal to noise ratio (SNR). However, when performing PD tests using UHF method at impulsive voltages, the test sensitivity depends largely on the performance of the antenna in frequency domain. This paper, therefore, aims to present a design of a novel Archimedes Spiral Antenna (ASA) specially used for PD tests at impulsive voltages. Through the electromagnetic simulation, the optimized parameters of the antenna are selected and discussed. The PD tests at repetitive impulsive voltages show that the designed ASA can receive PD signals with high SNR and can be used for partial discharge inception voltage (PDIV) tests on insulation systems/models according to the IEC 60034-18-41 and IEC 60034-27-5.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122009029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electrical Field-Strength Dependent Space Charge and Charge Decay Characteristics at Silicone Rubber / Silicone Grease Interfaces 硅橡胶/硅脂界面电场强度相关的空间电荷和电荷衰减特性

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544843

S. Spelzhausen, Mario-Rafael Ionian, R. Plath

引用次数: 1

Research on Feature Reduction Method for Partial Discharge Pattern Recognition of Converter Transformer 换流变压器局部放电模式识别的特征约简方法研究

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544864

Shuangjing Zhu, B. Qi, Peng Zhang, C. Gao, Chengrong Li

{"title":"Research on Feature Reduction Method for Partial Discharge Pattern Recognition of Converter Transformer","authors":"Shuangjing Zhu, B. Qi, Peng Zhang, C. Gao, Chengrong Li","doi":"10.1109/CEIDP.2018.8544864","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544864","url":null,"abstract":"The effective identification of the partial discharge fault type of the converter transformer can significantly improve the power supply reliability of the HVDC transmission system. In the partial discharge pattern recognition, the feature extraction will directly affect the ability of the classifier to identify the fault type. So, it is a key problem to extract features that can reflect the essential characteristics of faults by adopting appropriate feature reduction methods currently. Therefore, in this paper, the feature reduction method is deeply studied, and the application results of several representative methods in partial discharge feature reduction are compared. Based on a large number of existing partial discharge test data, firstly, the fingerprint features of the partial discharge are extracted to construct the feature space. Then, three representative feature reduction methods are used to optimize and reduce dimension of feature space, including kernel principal component analysis(KPCA), rough set theory(RST) and correlation coefficient matrix respectively. Finally, the feature space with reduced dimensionality is taken as the input of the back propagation (BP) neural network. The advantages and disadvantages of the three different Feature reduction methods are comprehensively considered in terms of convergence time and recognition accuracy. This paper compares the commonly used feature reduction methods in the process of feature extraction, and combines it with BP neural network for partial discharge pattern recognition. It can be concluded from this paper that these methods can be applied to the feature reduction of the feature space of the partial discharge. Applying these methods to existing experimental data, we can find that the combination of feature space reduction method and BP neural network can significantly improve the accuracy of partial discharge pattern recognition.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128421476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discharge-Induced Ignition of Combustibles on Ac Power-Supply Cords 交流电源线上可燃物的放电引燃

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544789

Yv Lshikawa, K. Takenaka, Y. Mizuno, A. Yoshida

引用次数: 4

Mica Insulating Tape for Large Generators with High Thermal Conductivity 高导热大型发电机用云母绝缘胶带

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544886

Ryoh Takahashi, Y. Takezawa, K. Fukushima, K. Saito

{"title":"Mica Insulating Tape for Large Generators with High Thermal Conductivity","authors":"Ryoh Takahashi, Y. Takezawa, K. Fukushima, K. Saito","doi":"10.1109/CEIDP.2018.8544886","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544886","url":null,"abstract":"We have developed two types of mica tapes, a resin rich (RR) tape and a vacuum pressure impregnation (VPI) tape. A RR tape is little load to the environment and indicates highly thermal conductivity. On the other hand, conventional impregnation process can be used for a VPI tape. Generally, as a stator coil of a generator, a two-layered mica tape comprising a mica-layer and a glass fabric-layer is used. In order to satisfy high thermal conductivity, superior insulation properties and impregnation properties simultaneously, we designed the composition of a mica-layer and a glass fabric-layer. Both types of developed mica tapes show 2.2 times higher thermal conductivity and have a thermal resistance of 54-55%, comparing with the conventional ones. Furthermore, they showed superior insulation properties at practical use electrical intensity. In addition, impregnation properties for VPI tape is equivalent to conventional ones. Thus the developed highly thermal conductive mica insulating tape may be applicable to the high efficiency of the large-capacity thermal generators, contributing the reduction of the environmental load.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133992090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient Electric Field Calculation of Zinc oxide arrester under Lightning Impulse Voltage 雷电冲击电压下氧化锌避雷器瞬态电场计算

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544771

Shiyi Zhou, Haoran Wang, H. Tian, Zehua Wu, Jianwei Cheng, Peng Liu, Zongren Peng

{"title":"Transient Electric Field Calculation of Zinc oxide arrester under Lightning Impulse Voltage","authors":"Shiyi Zhou, Haoran Wang, H. Tian, Zehua Wu, Jianwei Cheng, Peng Liu, Zongren Peng","doi":"10.1109/CEIDP.2018.8544771","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544771","url":null,"abstract":"For a fast changing excitation like lightning impulse voltage which is applied to a zinc oxide arrester, its waveform in frequency domain contains many different frequency harmonic components and its response is the sum of the response of each harmonic component. Nevertheless, the existing simulation analysis of electric power equipment's lightning withstand performance almost doesn't consider the effects of some materials, like varistors, whose permittivity vary with frequency. Moreover, in the IEC, the lightning impulse withstand voltage test of zinc oxide arrester's polymeric house is without the varistors or with transformer oil instead of the varistors. In this paper, the variation of permittivity with frequency is considered, and material parameters for calculation are acquired from experiments. By using software MATLAB and Fourier analysis, the lightning wave is resolved into a sum of different frequency waveforms. The transient electric field (TEF) distribution of a zinc oxide arrester under lightning impulse voltage is computed with finite element software COMSOL. Other two same models without considering the variation of permittivity and with transformer oil instead of the varistors are computed separately. The three results are compared and the relative increase of maximum electric field strength can be as high as 20.18%. Therefore, this method for calculating the transient electric field (TEF) distribution of the zinc oxide arrester is more accurate and more meaningful, and can be promoted to other electric power equipment.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132587541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The Acoustic Wave Behavior Within the PEA Cell for Space Charge Measurement 用于空间电荷测量的PEA电池内声波行为

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544766

A. Imburgia, P. Romano, G. Chen, B. Huang, G. Ala, E. R. Sanseverino, F. Viola

引用次数: 6

Evidencing of the Capacitive Effects on the Development of Creeping Discharges at Solid/Fluid Interfaces 电容效应对固体/流体界面蠕变放电发展的影响

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544824

A. Beroual, U. Khaled

引用次数: 0