2019 International Conference on High Voltage Engineering and Technology (ICHVET)最新文献_第2页

Estimation of Gas Discharge Rates in EHV Gas Circuit Breakers 超高压气体断路器气体放电速率的估算

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724214

S. Roy, R. Kiran, M. M. Rao

{"title":"Estimation of Gas Discharge Rates in EHV Gas Circuit Breakers","authors":"S. Roy, R. Kiran, M. M. Rao","doi":"10.1109/ICHVET.2019.8724214","DOIUrl":"https://doi.org/10.1109/ICHVET.2019.8724214","url":null,"abstract":"The basic philosophy of a two-stage blast interrupter is the combination of self-blast and puffer interrupting principles. Conventionally, analytical techniques are used to calculate thermodynamic properties, prior to simulation, in different zones of the interrupter model. It is important to validate these results on gas circuit breaker for various test duties specified by IEC prior to its evaluation at short circuit laboratory. In view of above, numerical techniques have been developed to calculate the SF6gas pressure-rise in various interrupter volumes and gas flow rate across different passages of interrupter with respect to time instant. In order to validate the analytical model developed in the study, an experimental set-up has been established to measure transient pressure-rise generated during circuit breaker operation. Further, to understand the gas flow pattern during circuit breaker operation, authors developed a CFX model. By using this numerical model, the gas flow rate distribution across various passages and through the insulated nozzle has been computed. Finally, the effect of nozzle profile and gas flow passage areas on transient pressure levels as well as its distribution across inter-electrode gap has been discussed in detail as part of the study.","PeriodicalId":165193,"journal":{"name":"2019 International Conference on High Voltage Engineering and Technology (ICHVET)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131883688","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

Dielectric and Thermal Properties of PTFE/CaCu3Ti4O12(CCTO) Nanocomposites 聚四氟乙烯/CaCu3Ti4O12(CCTO)纳米复合材料的介电和热性能

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724343

A. Ashokbabu, P. Thomas

引用次数: 4

Experimental Analysis for the Effect of Fe/Ti Oxides and Fe-Cu Nanoparticles on the Dielectric Strength of Transformer Oil Fe/Ti氧化物和Fe- cu纳米颗粒对变压器油介电强度影响的实验分析

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724311

Suhaib Ahmad Khan, A. A. Khan, M. Tariq

引用次数: 7

Influence of Shed Profile on the Pollution Performance of Porcelain Insulators 棚型对瓷绝缘子防污性能的影响

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ichvet.2019.8724350

Ramkumar N V, A.S Chandramouleeswaran, S.V Phaneesha

引用次数: 1

Flashover Performance of Composite and Porcelain Insulators 复合绝缘子和瓷绝缘子的闪络性能

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724328

K. A. Aravind, P. Rajamani, B. Krishna, K. Sandhya, P. Nirgude

引用次数: 3

Investigation of Particle Initiated Partial Discharges in Transformer Oil with Pressboard Barrier Under Divergent Fields 发散场下具有压板屏障的变压器油颗粒引发局部放电的研究

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724264

Muhammed Faisal Rahman, P. Nirgude

{"title":"Investigation of Particle Initiated Partial Discharges in Transformer Oil with Pressboard Barrier Under Divergent Fields","authors":"Muhammed Faisal Rahman, P. Nirgude","doi":"10.1109/ICHVET.2019.8724264","DOIUrl":"https://doi.org/10.1109/ICHVET.2019.8724264","url":null,"abstract":"Particle initiated partial discharge (PD) in oil is one of the significant problem associated with transformer. Among particles, conductive particles play very detrimental role. The existence of conducting particles is very difficult to avoid completely during the manufacturing process and also it can be developed during service period of the transformer. These free conductive particles can adhere to paper or pressboard insulation barrier or freely move in the bulk oil. In transformers divergent (non-uniform) fields are often present due to the geometry of the internal parts and may be due to sharp points. Therefore to understand and characterize the effect of conducting particle in oil with pressboard barrier under divergent fields are very critical for the life assessment of transformer. Sphere-plane and needle-plane electrodes are used to generate different non-uniform fields. The discharge measurements are carried out using partial discharge measurement technique according to IEC 60270. Phase resolved partial discharge (PRPD) pattern, discharge characteristics such as average and peak discharge magnitude, number of discharges per cycle, discharge power, rise and duration time of PD pulse due to conducting particle in oil with pressboard barrier under divergent fields are analyzed. The observed PRPD pattern were relatively similar regardless of applied divergent fields. The observed PD inception is much earlier in quasi uniform field compare to non-uniform filed, the PD inception voltage (PDIV) in non-uniform field is three times higher than that occur at quasi-uniform field.","PeriodicalId":165193,"journal":{"name":"2019 International Conference on High Voltage Engineering and Technology (ICHVET)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117104286","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

Localization of Incipient Discharge in Power Transformer Using UHF Sensor 利用超高频传感器定位电力变压器初放电

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724280

M. Chakravarthi, A. Giridhar, D. Sarma

引用次数: 4

Seismic Qualification of High Voltage Substation Equipment 高压变电所设备抗震鉴定

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724274

R. Selvam, Yamini Gupta

{"title":"Seismic Qualification of High Voltage Substation Equipment","authors":"R. Selvam, Yamini Gupta","doi":"10.1109/ICHVET.2019.8724274","DOIUrl":"https://doi.org/10.1109/ICHVET.2019.8724274","url":null,"abstract":"Earthquake causes simultaneous three dimensional ground shaking. Functioning of electrical equipment during and/or after seismic event is paramount for rescue operation and for safe and reliable power supply. High voltage substation equipment are tall and slender structures with low natural frequency. The natural frequency of high voltage substation equipment lies in the high energy band of earthquake signals, also ceramic insulators used in substation equipment are highly brittle which makes it vulnerable to seismic event. Performance of substation equipment under seismic dynamic loading condition should be evaluated to avoid failures. An electrical substation consists of set of equipment that are interconnected. In addition to design of individual substation equipment for seismic loading, interconnection of equipment should also be designed by considering relative displacement between equipment and dynamic load transfer between equipment. Central Power Research Institute (CPRI) is equipped with state-of-the-art tri-axial shake table facility for simulating true earthquake vibration. Seismic qualification methods, codal provisions and seismic performance evaluation of 245 kV Horizontal double break disconnector by shake table method are discussed in this paper. The seismic stresses at critical locations are presented along with relative displacement at the terminal of disconnector.","PeriodicalId":165193,"journal":{"name":"2019 International Conference on High Voltage Engineering and Technology (ICHVET)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127978111","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

Failure of Distribution-Class Surge Arresters and Preventive Measures 配电级避雷器故障及预防措施

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724320

Puneeth Bhurat, M. S, V. N

引用次数: 0

Comparison of Partial Discharge Performance of Identical Generator Transformers in a Thermal Power Station by Acoustic Emission Technique - Case Studies 用声发射技术比较某火电厂同一发电机变压器局部放电性能——以实例为例

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI: 10.1109/ICHVET.2019.8724340

T. B. Shanker, V. Vaidhyanathan, A. Mohamed

{"title":"Comparison of Partial Discharge Performance of Identical Generator Transformers in a Thermal Power Station by Acoustic Emission Technique - Case Studies","authors":"T. B. Shanker, V. Vaidhyanathan, A. Mohamed","doi":"10.1109/ICHVET.2019.8724340","DOIUrl":"https://doi.org/10.1109/ICHVET.2019.8724340","url":null,"abstract":"Generator transformers in thermal power stations are capital intensive and form a vital link between generation and transmission of bulk power to the grid stations of ac power system. Condition assessment of these transformers is very essential and important in order to avoid unforeseen breakdown, thereby causing inconvenience to the end user and financial loss. Insulation system of transformer is very complex and periodic condition assessment for partial discharges in the insulation is very crucial. There are several techniques like off-line and on-line techniques to assess the condition of these transformers for partial discharges. Except the tests on oil, all other tests are off-line and require outage of the transformers, thereby causing disruption of the power supply. Presently, a few on-line techniques have been developed to assess the condition of these transformers. Of several on-line techniques, acoustic emission technique is gaining focus among most of the researchers for monitoring the performance in terms of partial discharges in the insulation of the generator transformers. Acoustic emission technique for detecting partial discharges is being tried as a tool for assessment of the condition of the transformer insulation and also to compare the performance of identical generator transformers. The principle of acoustic emission technique along with in-situ findings of the performance of identical single phase generator transformers of 400kV class for partial discharges, in a thermal power station are discussed in this paper as case studies Some of the observations during the field trials are also discussed.","PeriodicalId":165193,"journal":{"name":"2019 International Conference on High Voltage Engineering and Technology (ICHVET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124185255","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