Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium最新文献_第10页

Wavelet Multi-Resolution Analysis Used for Partial Discharge Pattern Recognition 小波多分辨率分析用于局部放电模式识别

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365193

Ji Yang, Lin Du, You Yuanwang

{"title":"Wavelet Multi-Resolution Analysis Used for Partial Discharge Pattern Recognition","authors":"Ji Yang, Lin Du, You Yuanwang","doi":"10.1109/MODSYM.2006.365193","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365193","url":null,"abstract":"Partial discharge pattern recognition is considered as an effective tool for insulation fault diagnosis on high voltage electric apparatus. Based on the multi-resolution theory of wavelet, a new image recognition method is presented in this paper, which is used in gray intensity image recognition formed by partial discharge phase resolved distribution pattern. Firstly, the outstanding recognition image of partial discharge and the reference one are decomposed by wavelet, and then pattern similarity-degree and adjacency-degree are calculated from the correlation coefficients of low-frequency sub-image at the different scale. The discharge samples extracted from discharge model experiment are processed to pattern recognition by maximum pattern adjacency-degree. According to the recognition rate of multi-resolution image decomposition with four typical wavelet function, the influence of wavelet decomposition scale, wavelet orthogonality and its smoothing continuity to recognizing rate is analyzed. The results show that a satisfied recognition effect has reached through the new method by choosing orthogonal wavelet and suitable decomposition scale","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121100809","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

Optimization of the Spark Gap Parameters for High Power Ultrasound Applications 大功率超声应用中火花间隙参数的优化

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365244

Mark P. Wilson, L. balmer, M. Given, S. Macgregor, I. Timoshkin

{"title":"Optimization of the Spark Gap Parameters for High Power Ultrasound Applications","authors":"Mark P. Wilson, L. balmer, M. Given, S. Macgregor, I. Timoshkin","doi":"10.1109/MODSYM.2006.365244","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365244","url":null,"abstract":"There is considerable interest in the industrial and commercial applications of high power ultrasound (HPU) generated using pulsed power techniques. These applications include metal peening, the treatment of ores and minerals before extraction, drilling technologies and the comminution and recovery of waste materials. In all of these applications, it is important to optimise the parameters of the discharge causing the shock wave in the working medium to maximise the efficiency of the treatment. In a research project at the University of Strathclyde, some applications of HPU to the treatment of waste to assist in recycling have been investigated. Two systems have been considered, slag from the manufacture of stainless steel and bottle glass. With the slag material, it is intended to separate stainless steel from the silicate matrix to permit its recovery. With the bottle glass, the intention is comminution of the material to allow it to be recycled in a more valuable form. Measurements of the efficiency of these processes have been made in terms of the mass of material processed versus the energy input as the parameters of the discharge gap have been varied. In parallel with this work, measurements have been made using pinducer sensors to determine the energy in HPU pulses generated by discharges under identical conditions. Correlations are made between the efficiency of material treatment and the intensity of the HPU pulse measured in the far field. It is hoped that this approach will allow the optimal gap parameters to be determined using pinducer measurements rather than time consuming trials based around materials processing","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123645886","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 of 60kV Pulse Power Generator Based on IGBT Stacks for Wide Application 应用广泛的基于IGBT堆的60kV脉冲发电机的研制

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365298

H. Ryoo, J. Kim, G. Rim, D. Sytykh, G. Gussev

{"title":"Development of 60kV Pulse Power Generator Based on IGBT Stacks for Wide Application","authors":"H. Ryoo, J. Kim, G. Rim, D. Sytykh, G. Gussev","doi":"10.1109/MODSYM.2006.365298","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365298","url":null,"abstract":"In this paper, a novel new pulse power generator based on IGBT stacks is proposed for pulse power application. The proposed scheme consists of series connected 9 power stages to generate maximum 60 kV output pulse and one series resonant power inverter to charge DC capacitor voltage. Each power stage is configured as 8 series connected power cells and each power cell generates up to 850 V DC pulse. Finally pulse output voltage is applied using a total of 72 series connected IGBTs. The synchronization of gating signal is important for series operation of IGBTs. For gating signal synchronization, a full bridge inverter and a pulse transformer generates on-off signals of IGBT gating and specially designed gate power circuit was used. The proposed scheme has lots of advantages such as long lifecyle, compact size, flat topped pulse forming, small weight, protection for arc, high efficiency, and flexibility to generate various kinds of pulse output. The operation of proposed pulse power supply was tested for PSII application and is confirmed that the proposed scheme can effectively be used for wide pulse power applications","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122869783","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: 14

SNS* Ring Extraction Kicker System SNS*环萃取踢脚系统

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365283

K. Rust, J. Tang, M. Plum

引用次数: 1

Voltage Breakdown in RF Cavities, DC Vacuum Gaps, and Computer Simulations 电压击穿在射频腔，直流真空间隙，和计算机模拟

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365177

G. Werner

引用次数: 0

Observations of Stimulated Acoustic Events Concurrent with Partial Discharge Events 与局部放电事件同时发生的受激声事件的观测

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365182

A. Wilder, J. Murdock

引用次数: 1

Green-Laser-Triggered Water Switching at 1.6 MegaVolts 1.6兆伏特的绿色激光触发水开关

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365277

J. Woodworth, I. Molina, D. Nelson, J. Maenchen, G. Sarkisov, J. Blickem, R. Starbird, F. Wilkins, D. van de Valde, D.L. Johnson

{"title":"Green-Laser-Triggered Water Switching at 1.6 MegaVolts","authors":"J. Woodworth, I. Molina, D. Nelson, J. Maenchen, G. Sarkisov, J. Blickem, R. Starbird, F. Wilkins, D. van de Valde, D.L. Johnson","doi":"10.1109/MODSYM.2006.365277","DOIUrl":"https://doi.org/10.1109/MODSYM.2006.365277","url":null,"abstract":"Multiple water switches are used in the self-breaking mode in many large pulsed power systems. We are studying laser-triggering of water switches at voltages of up to 1.6 MV to see whether we can lower the command jitter of water switches. We have previously reported studies of 170-kV water switching with command jitters as low as plusmn2 ns. Our experiments are performed on a water switch in the middle of a 1.8-meter long 7.8-ohm coaxial water line that is directly charged by a 65-kJ Marx generator. The zero-to-peak risetime of the sinusoidal pulse impressed across the water switch is ~350 ns. To trigger the switch, we transport a green laser beam (0.4 J, 7-ns pulsewidth) radially inward through the water of the coaxial line to a box inside the inner coax line. There, the laser beam is turned 90 degrees and focused through a hole in one electrode to a breakdown arc in the water between the switch electrodes. Best results, of plusmn8.3 ns jitter and 100 ns delay at 60% of the self-break voltage, have been achieved using an axicon lens to focus the beam to a long narrow chain of point breakdowns between the switch electrodes","PeriodicalId":410776,"journal":{"name":"Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114491036","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

Virtual Cathode Oscillator Component Optimization 虚拟阴极振荡器元件优化

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365206

Y. Chen, J. Mankowski, J. Walter, M. Kristiansen

引用次数: 1

Evaluation of a 4 mm x 4 mm SiC GTO at Temperatures up to 150°C and Varying Pulse Width 在高达 150°C 的温度和不同脉冲宽度条件下对 4 mm x 4 mm SiC GTO 进行评估

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365219

H. O’Brien, W. Shaheen

引用次数: 6

Compact, Portable Pulsed Power Lessons Learned and Quo Vadis 紧凑，便携式脉冲电源的经验教训和现状

Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium Pub Date : 2006-05-14 DOI: 10.1109/MODSYM.2006.365170

E. Schamiloglu, K. Schoenbach, R. Vidmar

引用次数: 0