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The Unified Master Equation (UME) is a pre-geometric research framework built from two opposing vacuum sectors, Δ (contractive) and Σ (expansive), organized through an O→Q→S architecture in which spacetime is not assumed at the fundamental level but emerges from an underlying pre-geometric …
We present the Unified Master Equation (UME), a parameter-free framework in which the vacuum ratio α = Δ/Σ is not assumed but derived as the unique Ward-balanced, RG-stable fixed point. Only two opposite vacuum fields, Δ and Σ, are assumed, with no …
We present the Unified Master Equation (UME), a parameter-free framework in which the vacuum ratio α = Δ/Σ is not assumed but derived as the unique Ward-balanced, RG-stable fixed point. Only two opposite vacuum fields, Δ and Σ, are assumed, with no …
We present the Unified Master Equation (UME), a parameter-free framework in which the vacuum ratio α = Δ/Σ is not assumed but derived as the unique Ward-balanced, RG-stable fixed point. Only two opposite vacuum fields, Δ and Σ, are assumed, with no …
We present the Unified Master Equation (UME), a parameter-free framework in which the vacuum ratio α = Δ/Σ is not assumed but derived as the unique Ward-balanced, RG-stable fixed point. Only two opposite vacuum fields, Δ and Σ, are assumed, with no …
J. George Hwang, Markus Zahn, Leif A. A. Pettersson
Comprehensive modeling and analysis is presented for the charge generation, recombination, attachment, and transport of positive ions, negative ions, and electrons in transformer oil between a positive high voltage sharp needle electrode and a large spherical ground electrode. Case studies show that …
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T Fogelberg, D. Sjöberg, Michał Świątkowski, Eric Mortensen et autres
During the coming decades energy efficiency will be a critical factor in reducing carbon emissions and fighting global warming. The power generation industry and transmission and distribution industries (T&D) contribute to a large part of energy losses in the society. The losses …
Rongsheng Liu, Leif A. A. Pettersson, Tommaso Auletta, Olof Hjortstam
Nanotechnologies have potential to be used in transformer industry in enhancing material properties which may lead to a compact design of transformer and reduced manufacturing cost. In this publication, breakdown physics in nanofluids is studied for transformer insulation liquid. Several types of …
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J. George Hwang, Markus Zahn, Leif A. A. Pettersson
Generalized analysis is presented extending recent work of the charging of a perfectly conducting sphere from a single charge carrier to two charge carriers of opposite polarity, with different values of volume charge density and mobility and including an ohmic lossy dielectric …
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Rongsheng Liu, Christer Törnkvist, V. Chandramouli, Orlando Girlanda et autres
Lightning impulse voltage breakdown tests were made in needle/plane, needle/sphere and U-type electrode systems and compared between ester fluids and mineral oil. Results show that the geometry of electrode has significant impact on both breakdown voltage and the velocity of streamer. The …
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J. George Hwang, Markus Zahn, Francis O’Sullivan, Leif A. A. Pettersson et autres
Transformer oil-based nanofluids with conductive nanoparticle suspensions defy conventional wisdom as past experimental work showed that such nanofluids have substantially higher positive voltage breakdown levels with slower positive streamer velocities than that of pure transformer oil. This paradoxical superior electrical breakdown performance …
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J. George Hwang, Markus Zahn, Leif A. A. Pettersson, Olof Hjortstam et autres
This paper presents an electro-thermal hydrodynamic model that explains the development of different streamer modes in transformer oil. The focus is on the difference between the slow 2ndand fast 3rdmode streamers discussed in the literature. Through the use of numerical methods the …
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