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Power Quality Problems Due to Transformer Inrush Current

机译:变压器涌入电流引起的电能质量问题

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Transformer energization can produce a large nonsinuoidal inrush current which contains both odd and higher order harmonic components that can put transformer winding under mechanical stress. Additionally, they can cause irregular tripping of harmonic protection relays. Furthermore, in relatively weak power systems, such as is the Bosnian system, the superposition of harmonic components with system resonance frequencies may produce temporary overvoltages (TOV). Transformer winding failures and metal oxide surge arrester (MOA) energy stresses can occur due to TOV. The paper demonstrates a case study of an energization of a 220/110 kV transformer and power quality problems that can appear due to higher harmonics. Energy stresses of MOA provoked by transformer energization are considered in the paper.
机译:变压器通电会产生大的非正弦浪涌电流,其中包含奇次谐波和高次谐波分量,这些谐波分量会使变压器绕组承受机械应力。此外,它们还会引起谐波保护继电器的不规则跳闸。此外,在相对较弱的电力系统(例如波斯尼亚系统)中,谐波分量与系统谐振频率的叠加可能会产生暂时的过电压(TOV)。 TOV可能会导致变压器绕组故障和金属氧化物电涌放电器(MOA)能量应力。本文演示了一个220/110 kV变压器通电和由于高次谐波而出现的电能质量问题的案例研究。本文考虑了变压器通电引起的MOA的能量应力。

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