2020 IEEE Electrical Insulation Conference (EIC)最新文献_第10页

Method to Profile the Maintenance Needs of a Fleet of Rotating Machine Assets using Partial Discharge Data 利用局部放电数据分析旋转机械资产维修需求的方法

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158577

R. Kuppuswamy

{"title":"Method to Profile the Maintenance Needs of a Fleet of Rotating Machine Assets using Partial Discharge Data","authors":"R. Kuppuswamy","doi":"10.1109/eic47619.2020.9158577","DOIUrl":"https://doi.org/10.1109/eic47619.2020.9158577","url":null,"abstract":"Online partial discharge (PD) measurements have long been used as an effective means to evaluate the condition of the stator windings of generators and motors. Those who manage a fleet of such assets have the responsibility to minimize the risk of disruption in service. The efficient way of managing is to allocate maintenance funds only to the asset(s) that needs immediate attention and to delay or skip maintenance for the rest in the population. The common practice to shortlist the worst performing assets is to use preset criteria based on PD pulse magnitude, its repetition rate or its derivatives. These metrics are unreliable as PD activity inside electrical insulation can accelerate or decelerate without a change in the physical condition of the electric insulation. Using them to shortlist the worst performing assets often results in incorrect identification and wastage of time and resources investigating the wrong bunch. Therefore, a better method to identify and profile the maintenance needs of an asset is needed. In the paper, a method to identify the worst performing assets in a fleet and determine if maintenance action is needed using PD measurement data is described. The fleet screening tool is based on the estimation of a sampling of destructive energy absorbed by the electrical insulation from PD activity and comparing its longterm accumulated values against a base distribution which is effectively a historical database of annual averages of actual power dissipated by a large population of similar assets. This tool provides a quick and usable result: what percent of similar assets in the population have suffered more damage than any given asset. This allows the asset owner to prioritize the asset for maintenance and minimize the risk of disruption in service. An example of the implementation is illustrated.","PeriodicalId":286019,"journal":{"name":"2020 IEEE Electrical Insulation Conference (EIC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127043523","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

The definition of RPDIV in impulsive testing and the effect of the electrical conditioning on the variability of the results 介绍了脉冲试验中RPDIV的定义以及电调节对试验结果变异性的影响

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158761

A. Caprara, G. Ciotti, A. Cavallini, A. Rumi

{"title":"The definition of RPDIV in impulsive testing and the effect of the electrical conditioning on the variability of the results","authors":"A. Caprara, G. Ciotti, A. Cavallini, A. Rumi","doi":"10.1109/eic47619.2020.9158761","DOIUrl":"https://doi.org/10.1109/eic47619.2020.9158761","url":null,"abstract":"This paper investigates the effect of preconditioning on the variability of the results when measuring the Repetitive Partial Discharges Inception Voltage (RPDIV) of electrical insulation systems subjected to impulsive voltage stresses. The reference International Standard considered in the following (IEC 60034-18-41 [1]) defines the RPDIV as the minimum voltage at which at least five Partial Discharges (PD) occurs in ten voltage impulses applied. Many testing devices have been designed according to such definition: they inject ten voltage impulses and, if five of them trigger PD events, the voltage is recorded as the RPDIV. Otherwise, the voltage is increased until the RPDIV condition is met. On the other hand, other systems focus their analysis on the time behavior of the PD probability in the course of the tests. They do not simply record the RPDIV at the ratio where the number of PDs is greater than 0.5 times the voltage surges, but when it is persistently larger than such threshold. It has been noted that the PD probability (i.e. the number of PD per number of voltage pulses) shows a non-monotone behavior during the RPDIV measurements and consistent variations above and below the 50% threshold occur. Therefore, results coming from the types of equipment having the two different approaches are often noticeably different and, as a consequence, the RPDIV results using different measurement systems might vary depending on how this parameter is calculated. This paper proposes the electrical conditioning as a possible procedure to reduce this variation, and thus to have results independent from the measuring apparatus.","PeriodicalId":286019,"journal":{"name":"2020 IEEE Electrical Insulation Conference (EIC)","volume":"58 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116544734","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

Analysis of the results of on-line Partial Discharge Monitoring and the impact of the maintenance actions on a 30 MVA synchronous generator 30mva同步发电机局部放电在线监测结果及检修措施影响分析

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158739

A. Caprara, G. Ciotti, L. Paschini

{"title":"Analysis of the results of on-line Partial Discharge Monitoring and the impact of the maintenance actions on a 30 MVA synchronous generator","authors":"A. Caprara, G. Ciotti, L. Paschini","doi":"10.1109/eic47619.2020.9158739","DOIUrl":"https://doi.org/10.1109/eic47619.2020.9158739","url":null,"abstract":"Power utilities are lately investing in asset management systems and tools that provide them with analytical parameters from field data to properly evaluate the conditions of their electrical assets, in particular the ones connected into the generation and transmission networks. Any fault leading to an outage could result in huge monetary losses related not only to repair costs but also to lack of energy generation or availability. This is particularly true in the case of electrical assets such as power generators like the one hereafter described and analyzed. One of the tools available for the asset managers to perform such evaluation is the on-line monitoring of the Partial Discharge (PD) phenomena, a non-intrusive technique capable of evaluating in real-time the conditions of the electrical insulation system, commonly considered the weakest point of most electrical assets and the principal source of faults leading to electrical outages. In this paper, an example of the effectiveness in the usage of such technique is discussed about a 30 MVA synchronous generator. Data related to the PD phenomena detected in the insulation system are reported together with the relevant analysis and their behavior over monitoring sessions. Moreover, since during the monitoring period some maintenance actions have been carried out by the utility owning the power station, the relation with the detected PD phenomena will be shown and discussed. This allows performing some critical evaluation about the effectiveness of the maintenance actions carried out.","PeriodicalId":286019,"journal":{"name":"2020 IEEE Electrical Insulation Conference (EIC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114487144","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

Electron Scattering Cross Section Data of Supercritical CO2 Clusters 超临界CO2簇的电子散射截面数据

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/EIC47619.2020.9158748

F. Haque, Jia Wei, L. Graber, Chanyeop Park

引用次数: 2

Investigation of EHV Current Transformer Failure by Dielectric Frequency Response Technique 用介电频率响应技术研究超高压电流互感器故障

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158762

D. Robalino, Ismail Güner

{"title":"Investigation of EHV Current Transformer Failure by Dielectric Frequency Response Technique","authors":"D. Robalino, Ismail Güner","doi":"10.1109/eic47619.2020.9158762","DOIUrl":"https://doi.org/10.1109/eic47619.2020.9158762","url":null,"abstract":"HV and EHV systems operate in a reliable and safe manner thanks to a proactive operational strategy and qualified expert judgement taken by asset management specialists and equipment manufacturers. Nevertheless, failure during operation is a potential risk that may derive in catastrophic events. In the field, there is a large amount of HV and EHV equipment such as bushings and instrument transformers with paper and mineral oil as main insulation media. For these equipment, oil sampling might be an option but it is not desirable, and sometimes, not even recommended by manufacturers. Aiming to avoid any catastrophic event, Hydro Quebec has relied on a variety of testing techniques to evaluate the condition of instrument transformers and bushings. Hydro Quebec incorporated dielectric frequency response (DFR) for condition assessment of oil-paper and resin-paper insulation systems. Technology now is not limited to low voltage DFR but it incorporates high voltage DFR (HVDFR) and the individual temperature correction (ITC) algorithm which have opened the opportunity for qualitative and quantitative evaluation. HV DFR and ITC present an alternative to intrusive diagnostic techniques for condition assessment and failure analysis of the main insulation of HV and EHV bushings and instrument transformers. The dielectric responses obtained from “normally aged” and “faulty” HV and EHV Current Transformers (CT) are discussed throughout this document, in addition with the analysis of the ITC algorithm as applied to MV, HV and EHV OIP CTs. The work covers a 765 kV rated OIP type CT removed from service and fully dissected to correlate DGA, DFR and actual findings inside the insulation system of the CT.","PeriodicalId":286019,"journal":{"name":"2020 IEEE Electrical Insulation Conference (EIC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130538468","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

The Impact Of Thermal Aging On The Electrical Endurance Of Corona-Resistant Magnet Wires 热老化对抗电晕磁铁导线电气寿命的影响

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158680

T. Han, A. Caprara, G. Ciotti, A. Rumi, A. Cavallini

引用次数: 0

Simulation method for large current opening process of circuit breaker based on damped oscillating voltage 基于阻尼振荡电压的断路器大电流开断过程仿真方法

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/EIC47619.2020.9158587

Yi Ma, Guochao Qian, Hongming Ma, Wei Wang, Dingkai Xu, Zhongzheng Ning

引用次数: 0

Compatibility Analysis of Piezoelectric Actuators in Supercritical Carbon Dioxide 压电驱动器在超临界二氧化碳中的相容性分析

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158670

Chunmeng Xu, Jia Wei, L. Graber

引用次数: 3

Design and Development of an Integrated Software and Hardware System for the Measurement and Analysis of Partial Discharges 局部放电测量与分析软硬件集成系统的设计与开发

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158722

D. Manu, P. Basappa

引用次数: 1

Dielectric Characterization Study on Medium-Voltage Ethylene Propylene Rubber (EPR) and Tree-Retardant Cross-Linked Polyethylene (TR-XLPE) Cables under Varying Thermal Conditions 变热条件下中压乙丙橡胶(EPR)和树阻交联聚乙烯(TR-XLPE)电缆介电特性研究

2020 IEEE Electrical Insulation Conference (EIC) Pub Date : 2020-06-01 DOI: 10.1109/eic47619.2020.9158709

A. Gorji, S. Banerjee, S. Jayaram

引用次数: 1