电力谐波检测迭代变权最小二乘快速基波提取方法

发布时间：2018-01-16 09:04

本文关键词：电力谐波检测迭代变权最小二乘快速基波提取方法　出处：《系统仿真学报》2014年12期 　论文类型：期刊论文

【摘要】：电力有源滤波器是电力谐波治理的主要设备。提出一种迭代变权最小二乘支持向量机检测的电力电流基波检测算法,结合结构风险最小和均方最小求解基波系数,可以避免不必要的谐波检测,检测参数降低至2个,加快了检测速度。该方法具有检测精度高、计算量小、抗干扰能力强的特点。根据基波半周期对称性,构造检测信号,将检测时滞缩短至半基波周期。通过仿真检验该算法的检测精度,其相对误差在±0.02%内,分析了基波信号突变及谐波信息突变对检测的影响。仿真结果表明了该方法在较大干扰下基波检测的有效性。
[Abstract]:Active power filter (APF) is the main equipment for harmonic control. An iterative and variable weight least square support vector machine (LS-SVM) detection algorithm for fundamental wave detection of power current is proposed. Combined with minimum structural risk and minimum mean square to solve fundamental wave coefficients, unnecessary harmonic detection can be avoided, detection parameters can be reduced to 2, and the detection speed is accelerated. This method has high detection accuracy and less calculation. The characteristic of strong anti-jamming ability. According to the fundamental semi-periodic symmetry, the detection signal is constructed, and the detection delay is shortened to the half-fundamental period. The accuracy of the algorithm is verified by simulation. The relative error is within 卤0.02%. The effects of the fundamental signal mutation and harmonic information mutation on the detection are analyzed. The simulation results show that the method is effective in detecting the fundamental wave with large interference.
【作者单位】：河南理工大学电气工程与自动化学院;
【分类号】：TN713.8;TM761
【正文快照】： 引言1要实现APF(Active Power Filter)的谐波补偿,谐波检测是前提。在早期的APF中,广泛采用“p?q”算法进行谐波检测,它需经坐标变换、滤波和反变换形成APF的参考轨迹,该方法仅适用于对称三相系统。许多学者对该缺点进行了改进。文献[1]将“p?q”法推广到了三相四线制系统。在

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