电力系统自动化2017，Vol.41Issue(7)：81-87,7.
基于快速近似联合对角化的谐波发射水平评估方法
Assessment Method of Harmonic Emission Level Based on Fast Approximate Joint Diagonalization
摘要
Abstract
A method based on fast approximate joint diagonalization (FAJD) is proposed to estimate the system-side harmonic impedance and calculate the harmonic emission level.Under Cartesian coordinates,according to the basic principle of harmonic Norton equivalent circuit,the relationships between the harmonic voltage and current at the point of common coupling (PCC) and the system-side and user-side current of the harmonic source are deduced.Considering basic conditions that both sides of harmonic current source are independent,the FAJD method is used to obtain the mixed matrix and the both sides' components of harmonic current source.Then the real and imaginary parts of the system-side harmonic impedance are obtained by comparing the basic circuit equation after getting mixed coefficient matrix by the least squares method.Hence the harmonic emission level is assessed.The method is based on the measured harmonic voltage and current at point of common coupling (PCC),without matching priori data or requiring observation target matrix to be an orthogonal matrix.So it has higher separation accuracy and better performance of anti-interference of background harmonic without pre-whitening while avoiding introducing unnecessary errors.Finally,based on the result of simulation and measured data,the feasibility and effectiveness of the proposed method is verified.关键词
盲源分离/快速近似联合对角化/系统侧谐波阻抗/谐波发射水平Key words
blind source separation/fast approximate joint diagonalization(FAJD)/system-side harmonic impedance/harmonic emission level引用本文复制引用
袁林,杨洪耕,王智琦,肖楚鹏..基于快速近似联合对角化的谐波发射水平评估方法[J].电力系统自动化,2017,41(7):81-87,7.基金项目
国家自然科学基金资助项目(51477105) （51477105）
This work is supported by National Natural Science Foundation of China (No.51477105). （No.51477105）
