2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)最新文献_第2页

Investigation of central frequency and central loss factor values on dioctyl-phthalate (DOP) plasticized PVC films 邻苯二甲酸二辛酯(DOP)增塑型PVC薄膜中心频率和中心损耗因子的研究

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526029

G. Csányi, Z. A. Tamus, T. Iváncsy

引用次数: 2

Influence of Temperature on Electrical Properties of POSS/Mineral Oil based Nanofluids 温度对POSS/矿物油基纳米流体电性能的影响

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526086

Jawad Ahmad, Jian Li, Feipeng Wang, Zhengyong Huang, M. A. Mehmood

{"title":"Influence of Temperature on Electrical Properties of POSS/Mineral Oil based Nanofluids","authors":"Jawad Ahmad, Jian Li, Feipeng Wang, Zhengyong Huang, M. A. Mehmood","doi":"10.1109/DIAGNOSTIKA.2018.8526086","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526086","url":null,"abstract":"Polyhedral Oligomeric Silsesquioxane (POSS), a nanometric hybrid molecule, is being paid great attention in the field of polymeric micro and nanodielectrics, providing strong dispersion and dissolution power in solid and liquid dielectric materials which overcomes the sedimentation and agglomeration issues in nanocomposite insulation materials. This work presents the effect of temperature on electrical properties of Octa-isobutyl POSS (Oib-POSS) mineral based nanofluids prepared with two different concentrations 0.1 and 0.15 wt. % and the results are compared with fresh mineral oil. Dielectric properties that include relative permittivity, dissipation factor and volume resistivity along with the AC breakdown voltage are analyzed within a temperature range of 0-80°C in agreement with the IEC standards. Finally, 2-parameter Weibull analysis is performed over the AC breakdown voltage to validate the consistency of breakdown results. It is found that the POSS nanofluids show improved AC breakdown strength and dielectric properties e.g. relative permittivity, dissipation factor and volume resistivity compared with virgin mineral oil in entire temperature range. The results also show that the increase of POSS concentration not only improve the dielectric properties but also enhance the AC breakdown strength of mineral oil.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129956920","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

A hybrid compensation system for provision of ancillary services in medium voltage grids 一种用于提供中压电网辅助服务的混合补偿系统

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526100

Ralf Böhm, M. Steglich, Björn Baucrnschmitt, C. Rehtanz, J. Franke

引用次数: 4

Thermovision measurements on electric machines 电机热视觉测量

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526033

Milan Šimko, M. Chupáč, M. Gutten

引用次数: 5

A Review of Methods and Associated Models used in Return Voltage Measurement 回路电压测量方法及相关模型综述

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526127

E. Mustafa, Ramy S. A. Afia, Tamus Zoltán Ádám

{"title":"A Review of Methods and Associated Models used in Return Voltage Measurement","authors":"E. Mustafa, Ramy S. A. Afia, Tamus Zoltán Ádám","doi":"10.1109/DIAGNOSTIKA.2018.8526127","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526127","url":null,"abstract":"The measurement of dielectric properties of high voltage equipment insulations gives the basic information of the condition of the insulation. This helps in determine the aging process in the insulation. The diagnosis of the dielectric properties of the insulation materials can be performed either in time or frequency domain. In the time domain, measurement of voltage return was introduced by Endre Németh in the mid of 1960's to study the slow dielectric polarization process. This technique then gave birth to new techniques Return Voltage Measurement and Voltage Response method. Due to the non-destructive nature of the techniques, they gain the attention of the researchers for the study of the insulation diagnosis. Since their birth the methods have been used by many researchers to study the aging and dielectric relaxation processes in the insulations with the introduction of different dielectric models such as Debye and Maxwell models. In this research work some recent research work done in the measurement of return voltage technique is studied with suggesting some potential areas of the implementation of the technique.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122644084","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: 7

Application of frequency method for analysis of power auto transformers 频率法在电力自动变压器分析中的应用

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526031

M. Gutten, Milan Šimko, D. Korenčiak, M. Chupáč, J. Hornak

引用次数: 0

Parameter Identification of Electromagnetic Unit in Capacitive Voltage Transformer 电容式电压互感器电磁单元参数辨识

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526088

Zhongxiao Cong, Peng-cheng Li, Hongwei Xu, Chaoxiang Liu, Peng He, Lin Du

引用次数: 2

Corona Resistance of Direct Flourinated Epoxy/Al2O3 Nanocomposites 直接氟化环氧/Al2O3纳米复合材料的耐电晕性能

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526102

Feipeng Wang, Yushuang He, Tao Zhang, Jian Li, Li He

引用次数: 2

Thermal Ageing Condition Assessment for Transformer Using Natural Ester-Paper Insulation Based on Polarization and Depolarization Current 基于极化和去极化电流的天然酯纸绝缘变压器热老化状况评估

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526122

Gu Chao, Zhu Mengzhao, Zhu Wenbing, J. Hao, Runhao Zou

{"title":"Thermal Ageing Condition Assessment for Transformer Using Natural Ester-Paper Insulation Based on Polarization and Depolarization Current","authors":"Gu Chao, Zhu Mengzhao, Zhu Wenbing, J. Hao, Runhao Zou","doi":"10.1109/DIAGNOSTIKA.2018.8526122","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526122","url":null,"abstract":"Accurate diagnosis of transformer aging state is very important for ensuring safe operation of transformer. Polarization and Depolarization Current (PDC) behaviors of mineral oil-paper insulation have been widely investigated. With the popularization and application of natural ester, it is very important to diagnose the aging state of natural ester transformer. In this paper, thermal ageing condition assessment for natural ester-paper insulation based on PDC was investigated. Results show that the degradation of polymeric insulation systems increases the space charge density and the concentration of electrical dipoles. The longer the ageing time, the higher amplitude the depolarization current values of natural ester-paper insulation sample (NEP). There is no consistent change for the absorption ratio and the polarization index of the natural ester-paper insulation in the aging process. The polarization index changing behavior for NEP is the same to mineral oil-paper insulation sample (MOP). While the absorption ratio changing behavior for NEP is different to MOP. The MOP has higher polarization index than the NEP when the DP falling down to 500. The NEP has higher absorption ratio than the MOP when the DP falling down to 800. According to the ratio of depolarized total charge quantity growth, the aging stage can be clearly divided into four stages, which is DP>800, 800>DP>600, 600>DP>400, DP<400. It is found that the depolarized total charge quantity growth can be used to predict the ageing condition of oil-paper insulation.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131190131","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: 2

PD Inception and Electrical Treeing of Silicone Rubber at DC Voltage Using Electrical and Optical Measurement Equipment 用光电测量设备在直流电压下测量硅橡胶PD的建立和电气树

2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika) Pub Date : 2018-09-01 DOI: 10.1109/DIAGNOSTIKA.2018.8526131

K. Vaterrodt, A. Leistner, G. Heidmann

引用次数: 3