|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 电晕放电脉冲电流波形和相位分布的测量、分析与仿真(英文)显示文摘Partial discharge(PD) is one of the most important phenomenon in high voltage insulations.In most cases, the appearance of partial discharges is related to insulation defects.Understanding partial discharges is important for diagnosis on insulation condition.Corona discharges appear when extremely high electric field appears on the conductor surface exceeding the electric field strength of the gas.The high electric field may occur at around protrusion with very sharp tip.This paper reported a holistic approach of corona discharge investigation.The needle-plane electrode system was used.The medium between the electrodes was air.The needle was made from steel with radius of curvature of 3μm(Ogura needle).Sinusoidal as well as triangular applied voltages were used.The waveform of the corona discharges was measured using a digital oscilloscope.The corona discharge pulses were measured using a phase-resolved PD measurement system.The system was able to measure the magnitude(q) and phase angle position(φ) of each PD pulses,as well as the number of discharge pulses(n).The role of applied voltage was investigated using phase-resolved analysis of corona discharge pulses through pulse sequence,pulse magnitude and pulse number analysis. Experimental results indicated that corona discharge current waveform was an impulse with rise time of about several ns and the impulse width of about 100 ns.The Fast Fourier Transform analysis indicated that the corona discharge current waveform had several spectrum peaks at frequency of 7.8 MHz,85.9 MHz,109.4 MHz and 195.3 MHz.The experimental results also showed that discharge pulses were concentrated around the peak of applied voltage for both sinusoidal and triangular voltages.The discharge magnitude,as well as its probability of occurrence,was strongly dependent on the instantaneous applied voltage.The shape ofφ-n,as well asφ-q-n PD patterns,were strongly reflected by the shape of applied voltage.In order to get deep understanding of the corona discharge,by utilizing results of the phase-resolved analysis,electrical equivalent circuits of corona discharges were proposed.The electrical equivalent circuit contained capacitances and a spark gap.For deeply understanding of PD phenomenon,computer simulation was done by using the proposed electrical equivalent circuits.The similarity of the measured and simulated PD patterns was assessed by comparing measured and simulated theφ-q-n andφ-n PD patterns.The results indicated that simulated PD patterns similar to those obtained from experiment. | Suwarno | 2011 | 高电压技术2011，37，11： | 3 |
| 2 | Time Sequential and Phase-resolved Measurement and Analysis of Corona Discharge in Air and Streamer Discharge in Insulating Liquid显示文摘Insulation is one of the most important parts in a high voltage equipment.There are gaseous,liquid and solid insulations which are commonly used.In a high voltage transformer for example the insulating materials are all used.During operation of a high voltage equipment high electric stress may occur.Under extreme condition failure of the insulation may take place.Excessive electric field in air may cause corona discharges while in liquid insulation discharges may take place in the form of streamer.This paper reports experimental results on the corona and streamer discharges in air and silicone oil.The discharges were artificially generated around a needle tip in a needle-plane electrode system with gap length of 4 mm under sinusoidal and triangular voltages.The needle was made of steel with tip radius of 3 μm and curvature angle of 30°.The needle was made by Ogura Jewelry.The discharge pulses were measured using personal-computer based partial discharge(PD)measurement system with sensitivity of better than 0.5 pC.The system is able to measure discharge in time sequential.Phase-resolved analysis of the discharges was done to interpret the physical processes behind the discharges.The experimental results showed that corona discharges took place at negative half cycles.The discharges were concentrated around 270° of phase angle of applied voltage.The discharge magnitude and discharge number of corona clearly dependent on the instantaneous of applied voltage.These were strongly supported by the application of triangular voltage.Streamer discharges occurred at both positive and negative half cycles.The discharges pulses concentrated around the peak of applied voltage at phase angle of 90° and 270°.Experimental results under sinusoidal and triangular voltages revealed that streamer discharge magnitude as well as probability of occurrence was strongly dependent on the instantaneous applied voltage. | Suwarno | 2008 | 高电压技术2008，34，12： | 2 |
| 3 | 快速凝固富钛Ti-V合金的微观组织和储氢性能(英文)显示文摘研究目的在于优化Ti0.8-0.9V0.2-0.1二元合金的相结构成分、微观组织和储氢性能。该合金主要用于从含有大量一氧化碳的高温气态混合物中吸收氢气。Ti0.8-0.9V0.2-0.1合金中的α-(HCP)和β-(BCC)相在纯氢气中基于氢化作用,形成单相FCC结构的氢化物,此过程与合金的化学成分无关。同步辐射X射线衍射的原位分析表明,在含有氢气和10%一氧化碳的混合气体中,只有β相转变成相应的氢化物。快速凝固(RS)处理细化了Ti0.8V0.2和Ti0.9V0.1合金的晶粒组织,而且,快速凝固处理增加了Ti0.9V0.1合金中的β相,其所占比例是普通熔铸条件下的两倍。扫描电子显微镜(SEM)分析表明,Ti0.9V0.1合金含有片状组织,层片的厚度约为300nm。热脱附谱(TDS)显示,微观组织的细化可以加快氢脱附的动力学过程。 | Suwarno SUWARNO Jan Ketil SOLBERG Jan Petter MAEHLEN Bente KROGH Bφrre Tore BφRRESEN Esther OCHOA-FERNANDEZ Erling RYTTER Mario WILLIAMS Roman DENYS Volodymyr A.YARTYS | 2012 | Transactions of Nonferrous Metals Society of China2012，22，8： | 2 |
| 4 | Oviposition preference of swallowtail butterfly, Papilio polytes (Lepidoptera Papilionidae) on four Rutaceae (Sapindales) host plant species显示文摘 | Suwarno M.R. Che Salmah Arshad Ali A. Abu Hassan | 2010 | Insect Science2010，17，4： | 1 |
| 5 | The Effects of Rapid Solidification on Microstructure and hydrogen Sorption Properties of Binary BCC Ti-V Alloys显示文摘 | Suwarno S Solberg J K Maehlen J P | 2014 | J Alloys Compd2014，582，： | 1 |
| 6 | Microstructure and Hydrogen Storage Properties of As-cast and Rapidly Solidified Ti-rich Ti-V Alloys 显示文摘 | Suwarno S Solberg J K Maehlen J P | 2012 | Trans Nonfer Met Soc China2012，22，8： | 1 |
| 7 | Influence of Cr on the hydrogen Storage Properties of Ti-rich Ti-V-Cr Alloys 显示文摘 | Suwarno S Solberg J K Maehlen J P | 2012 | Int J Hydrogen Energy2012，37，9： | 1 |
| 8 | The effects of rapid solidification on microstructure and hydrogen sorption prop- erties of binary BCC Ti-V alloys显示文摘 | SUWARNO S SOLBERG J K MAEHLEN J P | 2014 | Journal of Alloys and Com- pounds2014，582，： | 1 |
| 9 | Model of partial discharges in liquids and computersimulation显示文摘 | Suwarno | 2009 | Research Journal of Applied Sciences2009，4，4： | 1 |
| 10 | Partial discharges due to electrical treeing in polymers显示文摘 | Suwarno Suzuoki Y Mizutani T | 1996 | J Phys D: Appl Phys1996，29，11： | 1 |
| 11 | Development of new reactor fuel materials显示文摘 | Yamamoto T Suwarno H Kayano H | 1995 | Journal of Nuclear Science and Technology1995，32，3： | 1 |
| 12 | Dynamics of biofilm formation under different nutrient levels and the effect on biofouling of a reverse osmosis membrane system显示文摘 | Xi Chen Stanislaus Raditya Suwarno Tzyy Haur Chong Diane McDougald Staffan Kjelleberg Yehuda Cohen Anthony G. Fane Scott A. Rice | 2013 | Biofouling2013，，3： | 1 |
| 13 | Selective Hydrogen Absorption from Gaseous Mixtures by BCC Ti-V Alloys 显示文摘 | Suwarno S Gosselin Y Solberg J K | 2012 | Int J Hydrogen Energy2012，37，5： | 1 |
| 14 | High voltage power transformer condition assessment considering the health index value and its decreasing rate显示文摘A health index method is a useful tool for the transformer assessment condition.This method has been used in several previous studies.However,most of them have not observed the health index decreasing rate as an aspect to improve the transformer con-dition assessment.A health index method with different approaches is proposed,considering the values and decreasing rate to assess the transformer condition.Inspection data from in-service and out-of-service 150 kV power transformers provided by the Indonesian electric company are included.The correlation between operating age and Health Index value and Health Index decreasing rate was also observed.With increasing operation age,the Health Index value tends to decrease with a correlation coefficient R2 of 0.631.Further analysis was conducted to power transformers with historical data of 3 years or more,which showed that the tendency of the Health Index value decreasing rate is higher with older transformers.This paper also illustrates the Health Index analysis of 35 out-of-service transformers,resulting in a more suitable Health Index value compared to the previous approach.This study proposes the transformer risk assessment based on its health index value and the decreasing rate. | Winanda Riga Tamma Rahman Azis Prasojo Suwarno | 2021 | High Voltage2021，6，2： | 1 |
| 15 | Genetic variation of Leptospira isolated from rats catched in Yogyakarta Indonesia显示文摘Objective: To detect genetic variations among pathogenic Leptospira isolated from rats using 16 S r RNA gen as chronometer. Methods: This is an observational study with cross sectional design. Rats saples were taken in Yogyakarta Special Region of Indonesia. Leptospira in the rats was detected by two methods ie. real time PCR(q PCR) by using primers correspond to16 S r RNA gene of Leptospira, and standard PCR by using dif erent set of primer correspond to the 16 S r RNA gene of Leptospira. The standard PCR amplicon then subjected for DNA sequencing. Analysis genetic variation was performed using MEGA 6.2. Software. Results:There were 99 DNA samples from rats included in this study. Detection of Leptospira by using q PCR revealed 25 samples positive for pathogenic Leptospira, while only 6 samples were able to be detected using standard PCR. The new primer set correspond to 16 S r RNA gene was able to detect specii cally pathogenic Leptospira in the rats. Sequencing analysis of 6 PCR amplicons showed that the Leptospira which infect the rats catched in Yogyakarta genetically close related with pathogenic Leptospira which were isolated from human, animal, rodents, and environment. Conclusions: It can be considered that rats are the most important vector and reservoir of Leptospira. | Hadi Sumanta Tri Wibawa Suwarno Hadisusanto Anik Nuryati Hari Kusnanto | 2015 | Asian Pacific Journal of Tropical Medicine2015，8，9： | 0 |
| 16 | A New Approach to Select Doubled Haploid Rice Lines under Salinity Stress Using Indirect Selection Index显示文摘This study determined the indirect selection index of doubled haploid(DH)rice using a multivariate analysis approach to select lines adaptive to salinity stress,comprising three experiments.The first experiment involved the selection of good agronomic characters in a field experiment conducted at an experimental station in Bogor,Indonesia.The second experiment involved salinity tolerance screening through hydroponic cultures using 0 and 120 mmol/L NaCl,conducted at a greenhouse in Bogor.The third experiment involved the validation of the indirect adaptability selection index(IASI)through a field experiment in Sukra(saline area).Field experiments followed a randomized complete block design(RCBD),whereas an RCBD nested factorial design was used for the greenhouse experiment.The first and second experiments used 56 DH lines and four check varieties with three replications.In the second experiment,Pokkali and IR29 varieties were also added as tolerant and sensitive checks of salinity,respectively.The third experiment used 28 selected DH lines,Inpari 29 and one sensitive DH line.The good agronomic index(GAI)was 0.465 yield+0.433 number of productive tillers+0.31 number of filled grains.This generated 24 DH rice lines with good agronomic traits.The salinity tolerance index(SaTI)was developed through the average of standardized salinity tolerance score and salinity selection index based on discriminant analysis.This generated 34 DH rice lines with good salinity stress tolerance.The IASI(IASI=GAI–SaTI)selected 28 DH rice lines adaptive to salinity stress and it was considered effective by Sukra validation. | Muhammad Fuad ANSHORI Bambang Sapta Purwoko Iswari Saraswati Dewi Sintho Wahyuning Ardie Willy Bayuardi SUWARNO | 2021 | Rice science2021，28，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员