基于全数字仿真系统对变压器和应涌流的影响因素及特性研究

摘要

The model of sympathetic inrush phenomena in transformers is established based on all digital simulation system, and the generation mechanism of parallel and cascade sympathetic inrush current is analysed. The factors influencing on amplitude and generating velocity of sympathetic inrush current are studied. It is concluded that electrical resistance is the main reason leading to the generation of sympathetic inrush and that the content of second harmonic generation remains high and stable. The conclusion lays a foundation for further research on sympathetic inrush current of transformer differential protection.%利用全数字仿真系统建立了变压器和应涌流电磁暂态仿真模型,对并联和级联和应涌流的产生机理做了详细分析,研究了电网以及变压器中各种因素对变压器和应涌流幅值和产生速度的影响,得出系统阻抗中电阻是和应涌流产生的主要因素以及和应涌流中二次谐波含量较高且稳定的特点,为进一步研究和应涌流对变压器差动保护影响奠定了基础.