基于概率谐波电流源的交流电力机车模型研究  

Study on AC-DC-AC locomotive modeling based on probabilistic harmonic current source

作　　者：田钰笙[1] 姜齐荣[1] 田旭[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电工电能新技术》2012年第3期11-15,共5页Advanced Technology of Electrical Engineering and Energy

基　　金：国家科技支撑项目课题:高速列车牵引供电技术(2009BAG12A09);国家电网公司课题

摘　　要：本文基于大量实测数据,采用一种改进的最大熵法分析了交流机车负荷谐波的分布特性,并在PSCAD仿真平台上搭建了交流电力机车的等效电流源模型。电流源基波分量以三电平四象限整流桥模拟,用于仿真机车负荷的冲击性以及不对称性对电网的影响。谐波分量则利用MATLAB接口模块实现了概率谐波电流源,考虑了谐波受各种随机因素的影响。由于谐波电流源模型基于实测数据,故仿真结果更接近实际情况。The AC-DC-AC locomotives＇ load characteristics are very different from those of AC-DC locomotives, so it is of great significance to build a proper model of AC-DC-AC locomotive for power system safety analysis and relative power quality evaluation. On the basis of a large amount of measured data, this paper analyzes the probabilistic representation of harmonic current generated by AC-DC-AC locomotives, using an improved maximum entropy method, and a current source model is set up using the PSCAD/EMTDC software. The fundamental component, which can simulate the problems brought about by traction load to power system caused by its impact and asymme- try, is achieved from a three-level four-quadrant converter. The harmonic component is generated by a probabilistic harmonic current source with the use of MATLAB interface module, taking into consideration the effects many random factors have on harmonics. Since the harmonic current model is based on measured data, the simulation result has a better agreement with practical situation.

关 键 词：电气化铁道 交流电力机车建模 概率谐波电流源 改进的最大熵法 

分 类 号：TM714[电气工程—电力系统及自动化]