The influence of stray inductance of storage capacitor and load capacitance on transients in high voltage facilities with pulse transformers

Abstract

У статті розглядається вплив паразитних індуктивностей накопичувального конденсатора і ємності об'єкта контролю на струми в первинній та вторинній обмотках імпульсного трансформатора. Крім того розглядається вплив паразитних індуктивностей на напругу на навантажувальній ємності об'єкта контролю, а також на ємності накопичувального конденсатора. Згідно з результатами проведеного моделювання паразитна індуктивність об'єкта контролю має більш значний вплив на форму напруги на ємності навантаження ніж паразитна індуктивність накопичувального конденсатора.

High voltage facilities based on gaining of voltage pulses by means of applying various types of pulse transformers are widely used in various engineering applications. Such high voltage facilities can be used for the elaboration of particle accelerators and in practice of forming pulses of high voltage for the purposes of electrical equipment testing. Technical characteristics of such high voltage facilities are signi ficantly influenced by the technical characteristics of applied pulse transformer and, therefore, by the parameters of applied equivalent scheme of pulse transformer. Requirements to the obtained time dependencies of formed voltage pulses that arise in practice of testing high voltage insulation by applying pulses of high voltage demand to take into consideration the influence of parasitic parameters of equivalent scheme. This paper presents the results of consideration of the influence of parasitic inductances of storage capacitor and capacitance of tested object on currents in primary and secondary windings of pulse transformer. The influence of stray inductance on time dependence of voltage on load capacitance of tested object of control, as well as on time dependence of voltage on capacitance of storage capacitor is also considered. According to the results of carried out simulations, the inevitable parasitic inductance of tested object has more significant effect on time dependence of voltage on load capacitance than the parasitic inductance of storage capacitor.