基于PSCAD电力机车建模与谐波分析

Modeling and Harmonic Analysis of Electric Locomotive Based on PSCAD

牵引系统电力机车是电力系统谐波的重要产生来源,准确分析机车多工况下的谐波特征有利于实施有效的谐波治理措施。论文以最小二乘法拟合牵引电机空载特性为基础,利用PSCAD建立了SS4型机车实时动态仿真模型。以陕西省某牵引系统为例进行了PSCAD软件建模仿真计算,不同工况下的谐波计算结果符合牵引网实际谐波机理特征,且典型工况下的现场实测分析结果亦与论文仿真计算结果一致。大量的分析结果表明所建立的机车模型的有效性和正确性,能够离线建模准确计算牵引系统的不同工况下的谐波特征,为现场谐波治理提供了有益的参考依据。

Traction system electric locomotive is an important harmonic generation to power system,accurate analysis of the characteristics of the harmonic characteristics of multi-working conditions is conducive to the implementation of effective harmonic control measures.In this paper,based on the least square method to fit the no-load characteristics of traction motor,a real-time dynamic simulation model of SS4locomotive is established by using PSCAD.Taking a traction system in Shanxi Province as an example,the PSCAD software modeling and simulation calculation is carried out.The harmonic calculation results under different working conditions are in line with the characteristics of the actual harmonic of traction network,and the results of the field test under typical conditions are consistent with the simulation results of the paper.A large number of analysis results show that the model is effective and accurate,and can accurately calculate the harmonic characteristics of traction system under different operating conditions which provides a useful reference for the field of harmonic control.