变压器线圈中特快速暂态仿真的建模

Modeling for Simulating Very Fast Transient in Transformer Windings

电力系统特快速暂态过电压（ＶＦＴＯ）对变压器等电力设备的危害极大。本文提出的由互有耦合的分布参数电路与集总参数电路组成的混合电路模型可以有效地应用于分析变压器等电力设备内特快速暂态的响应以及线圈内的局部电磁振荡。这个模型还可以用于精确计算变压器的入端阻抗，与ＥＭＴＰ连接，可以更精确地分析电力系统、变电站和变压器内的电磁暂态。

The model presented in this paper is worked out by combining multi-trasmission line model with lumped circuit model with mutually electromagnetic coupling taken into consideration.This model can be efficiently applied to simulate the very fast transient in the coil type of Power apparatus such as transformer and to simulate the local electromagnetic oscillations in windings. This model also can be used to calculate the impedance of transformers in establishing a high frequency model of a transformer for EMTP.