2017 IEEE 21st International Conference on Pulsed Power (PPC)最新文献

Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage 交流电压下用空气中电极间隙预先测定电力电缆局部放电起始电压

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-10-10 DOI: 10.1109/PPC.2017.8291314

F. P. Mohamed, W. H. Siew, B. Sheng, B. Stewart, E. Morris

{"title":"Pre-determination of partial discharge inception voltage in power cables using electrode gaps in air under AC voltage","authors":"F. P. Mohamed, W. H. Siew, B. Sheng, B. Stewart, E. Morris","doi":"10.1109/PPC.2017.8291314","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291314","url":null,"abstract":"The breakdown of insulation in cables while in service can cause considerable damage to equipment and the accessories to which they are connected. PD in cables arises due to the overstressing of cable insulation resulting from electric field enhancement caused by imperfections in cable core and screen. The nature and magnitude of PD activity depends upon the type of defect, aging, environmental factors, applied voltage and cable loading. Reduction in system voltage can potentially reduce PD, which will correspondingly extend the service life of the cable. Currently, industry voltage statutory requirements permit ±6% tolerance setting on nominal voltage on distribution networks. This ±6% voltage reduction on may have little or an adverse effect on PD magnitude depending on the nature of defect present in the cable. Hence there is a clear requirement to pre-determine the PD inception voltage in cables through laboratory experiments to understand the significance of voltage reduction. This means to verify the effect of voltage reduction on extinguishing or minimizing PD activity in cables. In this paper, range of voltages at which PD incepts termed as partial discharge inception voltage(PDIV) is measured using a test cell containing different types of electrode configuration having different spacing. PDIV measured using the test cell is verified by conducting partial discharge testing in paper insulated lead covered (PILC) and cross-linked poly ethylene(XLPE) cables. It has been found that PDIV measured using the test cell and cable are in good agreement.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133848862","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

Development and testing of a 200kA, 10/350μs lightning impulse current generator switch module 200kA、10/350μs雷电冲击电流发生器开关模块的研制与测试

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291096

J. Koutsoubis, J. Gray, N. Kokkinos, D. Kokkinos

引用次数: 2

PULSE forming networks development for a 60–380 ns pulsed power supply for 2 ka 20 mev linear induction accelerator 用于2 ka 20 mev线性感应加速器的60-380 ns脉冲电源脉冲形成网络的开发

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291090

A. Akimov, P. Bak, M. Egorychev, P. Kolesnikov, V. Logunov, O. Nikitin

引用次数: 2

Periodic GW level microwave pulses in X-band from a combination of a relativistic backward wave oscillator and a helical waveguide compressor 由相对论反向波振荡器和螺旋波导压缩器组合产生的x波段周期GW级微波脉冲

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291306

P. Macinnes, V. Bratman, L. Zhang, G. Denisov, W. He, N. G. Kolganov, M. McStravick, S. Mishakin, C. Robertson, S. Samsonov, C. Whyte, A. Young, K. Ronald, A. Phelps, A. Cross

{"title":"Periodic GW level microwave pulses in X-band from a combination of a relativistic backward wave oscillator and a helical waveguide compressor","authors":"P. Macinnes, V. Bratman, L. Zhang, G. Denisov, W. He, N. G. Kolganov, M. McStravick, S. Mishakin, C. Robertson, S. Samsonov, C. Whyte, A. Young, K. Ronald, A. Phelps, A. Cross","doi":"10.1109/PPC.2017.8291306","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291306","url":null,"abstract":"Backward Wave Oscillators (BWO's) utilizing moderately relativistic (~550kV), high-current (~10 kA) electron beams are capable of producing hundreds of MWs of pulsed radiation in the centimeter wavelength range. Such relativistic BWOs (RBWOs) allow for broadband, smooth, frequency-tuning via adjustment of the accelerating potential; making them an attractive source for use in frequency-swept pulse compression. This paper presents results of a 2.86m long 5-fold helically corrugated, dispersive pulse compressor where a maximum power compression ratio of 25 was achieved by compressing an input microwave pulse of 80 ns duration swept from 9.65 GHz to 9.05 GHz into a 1.6ns Gaussian-envelope pulse. For an average input power of 5.8 kW generated by a conventional traveling wave tube amplifier, a peak pulse output power of 145 kW was measured corresponding to an energy efficiency of 66%. An X-band relativistic BWO, designed to drive a 0.97m long 5-fold compressor, was built and tested using the accelerating potential generated by a SINUS-6 highcurrent accelerator. The experimental RBWO operated close to the predicted power of 700MW with its oscillation frequency varied from 10 to 9.6GHz via the falling edge of the voltage pulse. It was demonstrated that the ~15ns duration frequency-swept part of the RBWO pulse was effectively compressed resulting in a 4.5-fold peak power increase with a maximum power of 3.2 GW generated. The potential for a 5-fold helical waveguide to compress longer duration pulses generated by a RBWO is discussed.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124297264","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 comparison of AC and DC partial discharge activity in polymeric cable insulation 聚合物电缆绝缘交流和直流局部放电活度的比较

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291168

E. Morris, W. H. Siew

引用次数: 5

Cygnus performance on five Subcritical Experiments 天鹅座在五个亚临界实验中的表现

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291174

J. Smith, E. Ormond, K. Hogge

{"title":"Cygnus performance on five Subcritical Experiments","authors":"J. Smith, E. Ormond, K. Hogge","doi":"10.1109/PPC.2017.8291174","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291174","url":null,"abstract":"The Cygnus Dual Beam Radiographic Facility includes two identical radiographic sources — Cygnus 1 and Cygnus 2. Cygnus is the radiography source used in Subcritical Experiments (SCEs) at the Nevada National Security Site (NNSS). The machine specifications are: Electric 2.25 MV, 60 kA, 60 ns; Radiation 4 Rad, 1 mm, 50 ns; Operation single shot, 2-shots/day. Cygnus has operated at the NNSS since February 2004. In this period, it has participated on five SCE experiments — Armando, Bacchus, Barolo A, Barolo B, and Pollux. SCE projects typically require over a hundred preparatory shots culminating in a single high-fidelity or SCE shot, and typically take over a year for completion. Therefore, SCE shots are high risk and high value making reliability and reproducibility utmost priority. In this regard, major effort is focused on operational performance. A quantitative performance measurement is valuable for tracking and maintaining Cygnus preparedness. In this work, we present a new model for analysis of Cygnus performance. This model uses x-ray dose distribution as the basis for calculation of reliability, record, and reproducibility. It will be applied both to longterm (historical) and short-term (readiness) periods for each of the five SCEs.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"14 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124522544","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

Time-resolved measurements of Cygnus x-ray production using Aerogel Cherenkov Detector 使用气凝胶切伦科夫探测器对天鹅座x射线产生的时间分辨测量

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291173

Y. Kim, H. Herrmann, M. Kaufman, R. Howe, C. Young, R. Malone, J. A. Green, T. Haines

引用次数: 0

Effects of anode and cathode surface treatments on vacuum breakdown between metal electrodes with 50-ns high voltage pulses 阳极和阴极表面处理对金属电极间真空击穿的影响

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291278

R. J. Alleni, D. Hinshelwood, S. Jackson, P. Ottinger, H. M. Rittersdorf, J. Schumer

引用次数: 1

Modeling Marx generators for maximum pulse repetition rate estimation 最大脉冲重复率估计的马克思发生器建模

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291179

L. Lamy Rocha, H. Canacsinh, J. F. Silva, L. Redondo, T. Luciano

引用次数: 1

Armature shape optimization of an electromagnetic launcher using genetic algorithm 基于遗传算法的电磁发射器电枢形状优化

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-18 DOI: 10.1109/PPC.2017.8291202

D. Ceylan, M. U. Güdelek, O. Keysan

引用次数: 1