变压器励磁涌流的Callahan数值计算及动态仿真

Dynamic Simulation and Numerical Calculation Based on Callahan Algorithm for Magnetizing Inrush Current of Transformer

探讨了不同期合闸空载变压器所致励磁涌流的产生机理 ,建立了用于电磁暂态过程计算的数值计算模型 ,运用半隐格式的Callahan算法深入计算分析了励磁涌流 ,得到了各相涌流波形 ,并通过Matlab动态仿真验证了Callahan算法数值计算结果的正确性。可供高阶非线性电路实际电磁暂态过程。

This paper discusses the mechanism of the generation of the magnetizing inrush current caused by asynchronously energizing in no-load three-phase transformer. A numerical calculation model is established for electromagnetic transient. A great deal of calculation of magnetizing inrush current based on the Callahan algorithm is carried out and its results are verified by Matlab dynamic simulation. The employed Callahan algorithm could provide valuable reference to research of electromagnetic transient process, design and operation of high voltage transformer and the selection of operation value or protection equipment.