2019 IEEE Electrical Insulation Conference (EIC)最新文献

Partial Discharge Inception Voltage in DC insulation systems: a comparison with AC voltage supply 直流绝缘系统的局部放电起始电压:与交流电源的比较

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046630

P. Seri, L. Cirioni, H. Naderiallaf, G. Montanari, R. Hebner, A. Gattozzi, Xianyong Feng

引用次数: 17

Influence of Ambient Humidity on PDIV and Endurance of Inverter-fed Motor Insulation 环境湿度对逆变电机绝缘PDIV和寿命的影响

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046593

Peng Wang, Yanghao Gu, Qi Wu, A. Cavallini, Qin Zhang, Jiawei Zhang

引用次数: 5

Capacitive Transfer Cable and Its Performance in Comparison with Conventional Solid Insulated Cable 电容传输电缆及其与传统实绝缘电缆的性能比较

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046580

Yang Yang, M. Darwish, M. Moghadam, Dominic Quennell, Ashkan Hajiloo

引用次数: 1

Polymer-Impregnated Concrete Insulators/Insulating Structures 聚合物浸渍混凝土绝缘体/绝缘结构

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046588

M. Gunasekaran

引用次数: 0

Synthesis of Experiences using Resistive Temperature Detectors (RTD) as PD Sensors for Detecting and Locating Electrical Defects inside Generator Stator Windings 电阻式温度检测器(RTD)作为局部放电传感器检测和定位发电机定子绕组电气缺陷的经验综合

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046614

R. Kuppuswamy, Sandy Rainey

{"title":"Synthesis of Experiences using Resistive Temperature Detectors (RTD) as PD Sensors for Detecting and Locating Electrical Defects inside Generator Stator Windings","authors":"R. Kuppuswamy, Sandy Rainey","doi":"10.1109/EIC43217.2019.9046614","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046614","url":null,"abstract":"It is generally accepted within the industry that terminal partial discharge (PD) measurements are less sensitive to electrical discharges deep within the stator windings. Typically, on large generators, electrical defects beyond 10-15% from the line-end of the stator winding cannot be detected. This equates to first 2 to 3 coils from the line-end. Therefore, other measures are necessary to expand the zone of detection. Large generators and motors are typically equipped with 12 or more resistive temperature detectors (RTDs) embedded into the stator winding. The RTD acts as an RF-antenna placed into a winding that is sensitive to the high frequency component of an electromagnetic pulse caused by PD. The RTD is both capacitively and magnetically coupled to the PD pulse originated by a discharge. Calibration tests show that the RTD is useful in assessing PD levels within a few adjacent slots from its location. Using case examples, comparison between two forms of PD measurements is presented - (a) Conventional terminal PD measurements using three 80pF epoxy mica capacitors on the line-side of each stator winding-phase; (b) Deep winding PD monitoring using embedded resistive temperature detectors (RTDs) as PD sensors. For the latter case, few RTDs in each stator winding-phase were selected to cover high and low potential slots in the winding. Detecting PD at lower potential slots using RTDs allows to detect faults caused by loose bars in the slot, “vibration sparking”. This report synthesizes the overall PD monitoring experience using collection of experiences from hydro and turbo generators. The focus is placed on demonstrating how RTDs have helped catch faults close to the winding neutral. Defect location capability of RTD PD sensors is demonstrated and results compared with corona probe measurements, which is traditionally used for defect location.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122060604","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

Investigation of Partial Discharge in Aircraft Conformally-Coated Printed Circuit Boards 飞机共形涂层印刷电路板局部放电的研究

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046586

Ehsan Zeynali, Ryan Bridges, B. Kordi

{"title":"Investigation of Partial Discharge in Aircraft Conformally-Coated Printed Circuit Boards","authors":"Ehsan Zeynali, Ryan Bridges, B. Kordi","doi":"10.1109/EIC43217.2019.9046586","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046586","url":null,"abstract":"Printed circuit boards (PCB) are key components of any electronic system. The reliability of PCBs under operating conditions is an important factor to ensure the performance of the system. In recent years, the electrical power demand in more-electric aircraft has significantly increased. To provide more power, the operating voltage is increased which imposes a higher level of electrical stress on the insulation system of PCBs and, therefore, a higher risk of failure. Partial discharges in PCBs are more likely to happen within the air gap. To improve the insulation of PCBs, they are coated with an insulation material. In this study, test boards with two parallel traces were fabricated and coated based on aerospace industry approved standards. The boards were energized using a 60-Hz adjustable high voltage source. Partial discharges were measured for silicone-coated test boards under pollution and conductive particles conditions. The impact of pollution location on partial discharge was investigated. Besides, the breakdown voltage of test boards was measured under different coating conditions and low air pressure. An increased withstand voltage for coated boards was confirmed.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124241607","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: 5

Observations from the Dissection of Several Aged Stator Coils from Different Hydrogenerators 不同水轮发电机定子线圈老化解剖观察

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046575

G. Stone, H. Sedding, R. Wheeler, Alastair Wilson

引用次数: 3

Fault Diagnosis in Rotor Windings in DFIG using Magnetic Flux Measurement Coil Antenna 磁通测量线圈天线在DFIG转子绕组故障诊断中的应用

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046638

A. Rehman, Yong Zhao, Guorui Huang, Yihan Zhao, Yu Chen, Yonghong Cheng, Toshikatsu Tanaka, Peng Wang

{"title":"Fault Diagnosis in Rotor Windings in DFIG using Magnetic Flux Measurement Coil Antenna","authors":"A. Rehman, Yong Zhao, Guorui Huang, Yihan Zhao, Yu Chen, Yonghong Cheng, Toshikatsu Tanaka, Peng Wang","doi":"10.1109/EIC43217.2019.9046638","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046638","url":null,"abstract":"Nowadays harnessing electric power through wind is one of the most important forms of sustainable power production. A doubly fed induction generator is commonly used in wind turbines, however short circuit fault of rotor windings severely affect its performance. So for this purpose, an experimental platform has been designed to detect the inter turn short circuit fault in rotor windings in doubly fed induction generator using a magnetic flux measuring coil antenna. The experimental platform has the following nameplate data: 100 kW wound rotor induction machine, supply voltage 400V, rated speed 1800 rpm, stator/rotor connection $Delta/mathbf{Y}$ and rated current 129/45 amp. The experimental setup comprises of the following subsystem: a motor to drive the generator, a condition monitoring system to acquire the date, a control system to regulate the speed and to perform the short circuit fault, a short circuit cabinet to make connection between the generator and control system. The experiment was performed at a no load, 25 kW and 50 kW load conditions. A magnetic field measuring coil antenna having a frequency range of 20 Hz - 500 kHz was placed on the axial side of the generator to acquire the output voltage. An obvious change in the amplitude of output voltage at frequencies of 250 Hz, 270 Hz and 280 Hz was observed, when the inter turn short circuit fault occurred. Which serves as a clear indication of the short circuit fault in the windings. The amplitude at these frequencies increases as the fault level increases, which is helpful for testing the fault severity. The results show that monitoring the search coil voltage is more effective and advance way than the motor current signature analysis to detect the inter turn short fault in rotor windings in doubly fed induction generator.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126424654","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

Estimation of Interphase Permittivity and Interphase Thickness in Epoxy based Nanocomposites using Electrostatic Force Microscopy 用静电力显微镜估计环氧基纳米复合材料的介电常数和厚度

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046552

Asha Sharma, S. Basu, N. Gupta

引用次数: 1

Scanning Individual Stator Bars and Coils with an Antenna to Detect Localized Partial Discharges 用天线扫描单个定子棒和线圈以检测局部局部放电

2019 IEEE Electrical Insulation Conference (EIC) Pub Date : 2019-06-01 DOI: 10.1109/EIC43217.2019.9046516

C. Hudon, M. Lévesque, S. Bernier, H. Provencher, É. Cloutier-Rioux, Yoon Duk Seol

{"title":"Scanning Individual Stator Bars and Coils with an Antenna to Detect Localized Partial Discharges","authors":"C. Hudon, M. Lévesque, S. Bernier, H. Provencher, É. Cloutier-Rioux, Yoon Duk Seol","doi":"10.1109/EIC43217.2019.9046516","DOIUrl":"https://doi.org/10.1109/EIC43217.2019.9046516","url":null,"abstract":"Partial discharge (PD) measurements have been carried out for years on generators, individual bars and form-wound coils. Even if the determination of quantitative criteria for what is considered normal and abnormal PD still represents a challenge in the industry, phase resolved partial discharge (PRPD) pattern recognition has been successfully used to recognize the nature of PD activity [1-3]. In the present work, conventional PD measurements using a capacitive coupler were compared with measurements made using an antenna to detect localized PD sites on individual bars and coils. The antenna was used to map localized PD sites along the entire length of the straight portion. The measurements were carried out on bars and coils of four different designs. The results revealed that the two measurement techniques give complementary information. It was found that the antenna had a limited sensitivity to PD occurring in micro-voids occluded within the groundwall insulation. For most of the bars and coils tested, the antenna did not detect any signal, even if there was always PD activity measured with the standard capacitive coupler. However, some of the specimens tested with the antenna revealed localized PD sites with distinctive PRPD patterns, suggesting that some anomalies were present at these sites. This information can thereafter be used to determine where to perform dissection of bars and coils.","PeriodicalId":340602,"journal":{"name":"2019 IEEE Electrical Insulation Conference (EIC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132215029","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: 4