电力系统暂态仿真中输电路模型的选择

Selection of Transmission Line Models Used in Power System Transient Simulations

本文给出了电力系统暂态仿真中多π节输电线路模型的选择方法;提出了衡量输电线路模型精确度的指标。通过对不同电压等级,不同长度输电线路模型频率特性的分析,得出了根据所研究的频率范围,确定相应π节长度的和般性结论。

A method used for determining the number of equivalent sections of transmission line mod- el over the frequency range of interest,according to the model accuracy defined herein,is proposed. Factors influencing the discrepancies between continuous or distributed parameter and multiple π or lumped-parameter models are discussed. General Conclusions concerning the section lengths of line models used in transient stability, machine-network transient and switching over-voltage studies are drawn.