考虑背景谐波电压变化的多谐波源谐波责任划分

摘要

A harmonic contribution partiton method of multiple harmonic sources considering the fluctuation of the background harmonic voltage is proposed.First,the system harmonic impedance is estimated by the dominant fluctuation filtering principle.Secondly,the background harmonic voltage is clustered and divided into different data segments by the mean shift algorithm according to the fluctuation of the background harmonic voltage.Finally,the harmonic contribution of each segment is estimated by the partial least squares method,and its harmonic weighted sum is calculated to obtain the final harmonic contribution.The method proposed is tested on an experimental circuit and an IEEE 1 3-bus test system.The results show that the method proposed is able to improve the accuracy of harmonic contribution partition,and effectively overcome the influence of background harmonic voltage fluctuation on harmonic contribution partition.%提出了一种考虑背景谐波电压变化的多谐波源谐波责任划分方法。首先，利用主导波动量法估算出系统侧谐波阻抗，然后根据背景谐波电压的波动情况，采用均值漂移算法对背景谐波电压数据进行聚类处理，按照电压值分为不同的数据段。最后，利用偏最小二乘法计算各个数据段谐波责任，加权求和得到关注时间段的谐波责任。为验证方法的有效性，分别在实验电路和 IEEE 13节点测试系统上进行仿真分析，结果表明，所提方法提高了谐波责任划分的准确度，能有效克服背景谐波电压变化对责任划分的影响。