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Extension of the empirical formula for pulsed electric strength of transformer oil

机译:变压器油脉冲电气强度经验公式的扩展

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摘要

Discharges in liquid obey time effect, pressure effect and scale effect. Traditional formulas are usually applied in a narrow range to keep the formula form consistent with Martin's formula. In this paper, we have developed a new empirical formula for the electric strength of transformer oil depending on pulse duration, hydrostatic pressure and gap geometry in form Ebr = κeat-beff Pγ A-β d-ξ to be applied in a wider range. In this formula, the time dependent pressure effect is represented by constant y, which can be expressed as γ = ape-bpt-cpeff. Time effect, area effect and distance effect are represented by eat-beff, β and ξ, respectively. For transformer oil, κ=0.42, a=0.53, b=0.23, ap=0.14, bp=0.93, cp=0.41, β=0.1 and ξ=0.25±0.06, with Ebr, teff, F, A and d in MV/cm, μs, MPa, cm2 and cm, respectively.
机译:排出液服从时间效应,压力效应和水垢效应。传统公式通常在狭窄的范围内使用,以使公式形式与Martin公式保持一致。在本文中,我们根据脉冲持续时间,静水压力和间隙几何形状开发了一种新的变压器油电气强度的经验公式,其形式为Ebr =κeat-beffPγA-βd-ξ,可在更大范围内应用。在该公式中,时间相关的压力效应由常数y表示,常数y可表示为γ= ape-bpt-cpeff。时间效应,面积效应和距离效应分别由Eat-beff,β和ξ表示。对于变压器油,κ= 0.42,a = 0.53,b = 0.23,ap = 0.14,bp = 0.93,cp = 0.41,β= 0.1和ξ= 0.25±0.06,MV中具有Ebr,teff,F,A和d / cm,μs,MPa,cm2和cm。

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