采用稳健独立分量分析的谐波发射水平评估方法  

A Method For Harmonic Emission Level Assessment Based on Robust Independent Component Analysis

作　　者：陈飞宇[1] 肖先勇[1] 汪颖[1] CHEN Feiyu;XIAO Xianyong;WANG Ying(College of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan Province,China)

机构地区：[1]四川大学电气工程学院,四川省成都市610065

出　　处：《电网技术》2020年第8期3007-3013,共7页Power System Technology

摘　　要：为有效评估系统侧和用户侧的谐波发射水平,提出一种采用稳健独立分量分析(robustindependentcomponent analysis,Robust ICA)的谐波阻抗估计及谐波发射水平评估方法。将公共连接点(point of common coupling,PCC)测量所得谐波电压与谐波电流数据的快速变化分量作为混合信号,通过稳健独立分量分析算法解混得到的独立信号与分离矩阵,利用诺顿等效电路方程的矩阵变换求解系统侧谐波阻抗值并进行两侧谐波电压发射水平的评估。利用Matlab软件基于诺顿等效电路及典型负荷曲线进行了仿真分析,验证了文中方法在不同背景谐波波动程度下均取得了优于传统方法的评估结果。工程实例应用亦验证了文中方法的正确性和实用性,具有较好的应用前景。To assess the harmonic emission level of both utility and customer sides effectively, a new method for harmonic impedance estimation and harmonic emission level assessment based on robust independent component analysis(Robust ICA) is proposed in this paper. The fast varying components of the harmonic voltage and current measured at point of common coupling(PCC) are extracted as mixed signals. By applying Robust ICA algorithm to the mixing matrix, separation matrix and independent components are obtained, and then harmonic impedance calculation and harmonic emission level assessment of both sides are performed utilizing matrix transformation of Norton equivalent circuit equations. Simulation with Matlab software based on Norton equivalent circuit and typical load curves proves that the proposed method can acquire better assessment results than traditional methods for different background harmonic fluctuation levels. Validity and practicability of the proposed method are also verified with field test data, proving its wide application prospect.

关 键 词：电能质量 谐波阻抗 谐波发射水平 独立分量分析 盲源分离 

分 类 号：TM721[电气工程—电力系统及自动化]