配电变压器过电压的研究

2017 18th International Scientific Conference on Electric Power Engineering (EPE) Pub Date : 2017-05-01 DOI:10.1109/EPE.2017.7967288

M. Florkowski, M. Kuniewski, J. Furgał, P. Pająk

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引用次数: 0

摘要

目前，电力系统中的电压瞬态与畸变源的特性和系统中出现的物理现象有关，可以呈现出不同的形状。过电压通常包含不同频率的振荡分量，这些振荡分量沿着到达变压器端子的线路传播。过电压影响电力变压器绝缘系统，尽管使用过电压保护。绕组绝缘系统过电压分析对变压器正常、可靠工作具有重要意义。由于变压器绕组结构复杂，绕组内的过电压与绕组端子处的过电压水平不同。本文介绍了配电变压器绕组内部过电压的研究。分析基于暂态电压和频率特性的测量结果。对基于绕组导纳测量的谐振频率进行了研究。

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Investigation of overvoltages in distribution transformers

Nowadays voltage transients in electrical power systems can take different shapes related to properties of distortion source and physical phenomenon appearing in systems. Usually overvoltages contain oscillation components of different frequencies, which are propagating along lines reaching transformer terminals. Overvoltages impact power transformer insulation systems in spite of used overvoltage protection. Analysis of overvoltages in winding insulation systems have strong importance in proper and reliable work of transformers. Due to complex configuration of transformer winding different overvoltages levels can occur inside winding than at winding terminals. This article presents investigation of internal overvoltages in distribution transformer windings. Analysis was based on measurements results of transient voltages and frequency characteristics. Investigation of resonance frequencies based on winding admittance measurements was made also.

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2017 18th International Scientific Conference on Electric Power Engineering (EPE)

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