电力系统及其自动化学报2017，Vol.29Issue(4)：55-59,5.DOI:10.3969/j.issn.1003-8930.2017.04.009
考虑波动系数筛选的谐波发射水平估计
Assessment on Harmonic Emission Level Considering Volatility Coefficient Screening
摘要
Abstract
In this paper,a new method to estimate the system harmonic impedance and harmonic voltage emission level is proposed considering volatility coefficient screening.First,based on the basic principle of fluctuation method,it can be inferred that the key to the improvement of the accuracy of fluctuation method is to filter out the harmonic samples when the background harmonic maintains stable.Second,through studying the correlation between the fluctuations of harmonic voltage and current at the point of common coupling,a model is built with the correlation coefficient in probability theory.Moreover,volatility coefficient is proposed as a screening index to measure the background harmonic fluctuation.Finally,the system harmonic impedance and harmonic voltage emission level can be estimated by the qualified samples after screening.Through the simulation of experimental circuit and the verification of practical engineering applications,it is proved that the proposed method is accurate and effective.关键词
电能质量/谐波阻抗/谐波发射水平/波动系数/筛选Key words
power quality/harmonic impedance/harmonic emission level/volatility coefficient/screening分类
信息技术与安全科学引用本文复制引用
邱思语,杨洪耕..考虑波动系数筛选的谐波发射水平估计[J].电力系统及其自动化学报,2017,29(4):55-59,5.
