换流变压器励磁涌流研究

Research on Inrush Current of Converter Transformer

首先基于云广±800 kV特高压直流输电系统的运行方式对可能产生励磁涌流的工况进行了分析,然后从变压器磁链的角度,理论分析了由于换流变与普通变的差异所导致的对换流变励磁涌流的影响,最后重点研究了换流变特殊励磁涌流的产生机理及特点。以云广±800 kV特高压直流输电系统楚雄换流站为例,通过仿真换流变压器励磁涌流,验证了理论分析的正确性。

Based on Yun-guang ±800 kV UHVDC system operation mode the operating condition that would lead to generate magnetizing inrush current is analyzed firstly. Then, from the aspect of magnetic flux linkage of transformers, the difference between a converter transformer and a common transformer is analyzed. And the influence of the difference on the magnetizing inrush current is analyzed in theory. Finally, the focus is placed on the analysis of the generation mechanism and characteristics of the special magnetizing inrush current of a converter transformer. With Yun-guang ±800 kV UHVDC system as an example, the validity of the theoretical analysis is verified by simulating the magnetizing inrush current of converter transformer.