变压器励磁涌流的抑制方法综述

Ｒeview of Attenuation Methods for Transformer Inrush Current

摘要:

变压器作为电力系统中的关键设备，其运行状态能否正确、稳定会影响到电网供电的可靠性。而变压器的励 磁涌流不仅容易影响到变压器差动保护的正确率，严重时还会对电力系统的其他设备造成严重的电气污染。这里指 出了励磁涌流产生的原因以及影响，并对当前抑制励磁涌流的措施，如一次侧串电阻法、电压侧并联电容法、选相合 闸法等方法的原理进行了综述，从经济和技术上对各方法的优缺点进行了分析，并对这些方法在国内外的实际应用 进行了介绍，展望了今后励磁涌流的抑制方法研究的发展趋势及研究方向。

Abstract:

As the key equipment in power system，whether the operation status of transformer is correct or stable will affect the reliability of power supply． The inrush current of transformer can not only affect the correct rate of differential protection of transformer，but also cause serious electrical pollution to other equipment of power system． The occurring causes and influence of inrush current are pointed out． The current measures for the suppression of inrush current are reviewed，such as series resistance method in primary side，shunt capacitance method in voltage side and phase selection method． The advantages and disadvantages of each method are analyzed from the economic and technical aspects，the practical application of these methods at home and abroad is introduced，and the developing trend and research direction of the future attenuation methods for inrush current are prospected．