基于EMTPE的750kV空载变压器励磁涌流仿真研究

Simulation of 750 kV Unloaded Transformer Excitation Surge Based on Software EMTPE

笔者结合新疆地区750kV吐鲁番—巴州输变电工程,应用EMTPE程序建立变压器励磁涌流仿真计算模型,该模型考虑了变压器的磁滞饱和特性。在所建立的模型上对变压器空载合闸时励磁涌流进行仿真研究,并对涌流中的谐波成分进行分析。通过现场实测,证明了仿真计算的正确性。仿真计算和实测结果表明,该模型能较准确地仿真变压器的励磁涌流,为变压器保护设计提供依据。

Taking the 750 kV Turpan-Bazhou transmission project in Xinjiang Uigur Autonomous Region as an example, a simulation model of transformer excitation surge is established based on the software EMTPE, in which the magnetic hysteresis saturation characteristic of the transformer is considered. Then the excitation surge at closing of unloaded transformer is simulated with the model to analyze the harmonic components in the surge. Field measurement verifies the simulation. This study may be of benefit to protection design of transformers.