摘要
电气化机车由非线性大功率电力电子设备拖动,这种设备产生大量的谐波电流注入电网中,对电网的计量及安全运行造成了影响。基于PSCAD/EMTDC软件对目前常用的交直型及交直交型各类机车进行了特征谐波电流分析。在此基础上,基于Matlab软件,采用曲线拟合的方法得到了多机车同时运行的谐波电流评估因数,并通过与实测数据分析的对比,证明了这种方法的可行性,为电气化机车谐波电流评估及其他多非线性负荷汇集点谐波电流评估提供了一种参考方法。
The electrical locomotive is driven by the nonlinear power electronic equipment , which can generate much harmonic current , these harmonic current pours into power grid and causes serious impact on the measurement and the safe operation of power grid.Based on PSCAD/EMTDC, the harmonic current of AC -DC and AC-DC-AC electrical locomotive is ana-lyzed .And by means of the Maltab analysis tool , the curve fitting method is adopted to obtain the evaluation factor of the multi-locomotive which are running at the same time .Through the comparison with the measured curve , the result shows the feasi-bility of the proposed method , which provides a reference method for the harmonic current evaluation of electrical locomotive and the harmonic current evaluation at the accumulation point of other multiple nonlinear loads .
出处
《四川电力技术》
2014年第4期62-65,80,共5页
Sichuan Electric Power Technology
关键词
电气化机车
特征谐波电流
曲线拟合
多非线性负荷
electrical locomotive characteristic harmonic current curve fitting multiple nonlinear loads
