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4篇 您的检索式:作者名="M. Florkowski"
    题名 作者 年代 出处 被引量
1Modeling of PD Mechanism in Non-uniform Field at High Pressure显示文摘Partial discharges in air in non-uniform electric field occur in surroundings made of high curvature elements.The equivalent electrode system,needle-plane refers both to external components of high voltage insulating systems and to micro sharpness in the internal structure of those systems.The ionization zone,accumulation of space charge and formation of corresponding current pulses depend on electrode configuration,voltage level,pressure,temperature and humidity of air.The assessment of pressure influence on discharge mechanism in non-homogenous electric field has been performed on the basis of empirical density distributions of discharge charges at different voltage levels,electrode distance,curvature of high voltage electrode and taking into account solid dielectric barrier in serial configuration.The measurement results obtained at variable voltage level yield the influence of electric field strength in the needle electrode zone.While increasing voltage,a deviation from normal distribution may be observed that reveals other forms of discharge.B. Florkowska M. Florkowski J. Roehrich P. Zydron 2008高电压技术2008,34,12:3
2Transfer Function Based Recognition of Resonance Overvoltages Transformer Windings显示文摘Power transformer insulation systems are subjected to many stresses during normal operation due to lightning and switching.If the spectrum of incoming surge voltage matches the winding one,the corresponding resonance will be excited.Therefore external transients occurring in power systems might trigger internal overvoltages with large maximum value in transformer windings.Overvoltages having such characteristic have been the root cause of many power transformer failures.The paper presents an approach to the identification of sensitive zones in the transformer windings based on the measurements of overvoltages inside windings and frequency dependences of admittance of the power transformer.The frequency characteristic of the transformer winding may determine those regions in the frequency spectrum.The presented approach might be used both for design optimization and diagnostics of distribution and power transformers.M. Florkowski J. Furgal 2008高电压技术2008,34,12:1
32-Hour Accelerated Diagnostic Protocol to Assess Patients With Chest Pain Symptoms Using Contemporary Troponins as the Only Biomarker显示文摘Martin Than Louise Cullen Sally Aldous William A. Parsonage Christopher M. Reid Jaimi Greenslade Dylan Flaws Christopher J. Hammett Daren M. Beam Michael W. Ardagh Richard Troughton Anthony F.T. Brown Peter George Christopher M. Florkowski Jeffrey A. Klin 2012Journal of the American College of Cardiology2012,,23:1
42-Hour Accelerated Diagnostic Protocol to Assess Patients With Chest Pain Symptoms Using Contemporary Troponins as the Only Biomarker显示文摘Martin Than Louise Cullen Sally Aldous William A. Parsonage Christopher M. Reid Jaimi Greenslade Dylan Flaws Christopher J. Hammett Daren M. Beam Michael W. Ardagh Richard Troughton Anthony F.T. Brown Peter George Christopher M. Florkowski Jeffrey A. Klin 2012Journal of the American College of Cardiology2012,,23:1
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