论文部分内容阅读
提出利用Laguerre多项式的逼近函数进行电力机车谐波电流估计。根据机车不同的运行方式建立机车模型,通过随机变量矩的合成求出机车电流的k阶原点矩,利用Laguerre多项式展开拟合其概率密度函数PDF(ProbabilityDensityFunction)。根据机车谐波电流与负荷电流的比例关系,求得谐波电流的95%概率估计值。最后,对SS1型机车产生的谐波电流进行估计,证明了该方法的有效性。
It is proposed that the approximation function of Laguerre polynomial can be used to estimate the harmonic current of electric locomotives. The locomotive model is established according to the different operation modes of the locomotive. The k-th origin moment of the locomotive current is obtained through the synthesis of the random variable moment. ProbabilityDensityFunction (PDF) is fitted by Laguerre polynomial expansion. According to locomotive harmonic current and load current proportional relationship, get the harmonic current 95% probability estimate. Finally, the harmonic currents generated by SS1 locomotives are estimated, which proves the effectiveness of the method.