谐波环境下基于时域特性分析的电能质量评估

在谐波环境下,电能质量容易发生畸变,电力系统极其不稳定,该研究采用时域特性分析的方法,构建出改进型的电能质量扰动分析模型.该模型能够提取电能扰动特征量、基波幅值变化特征量和加性扰动特征量等,通过Daubechies小波变换实现信号的放大,并对电能质量进行多角度分析.该研究通过对电能质量特征进行量化分析,及时获取谐波、间...

Power quality evaluation based on time-domain characteristic analysis in harmonic environment

In the harmonic environment,the power quality is prone to distortion and the power system is extremely unstable.This study adopts the time-domain characteristic analysis method to construct an improved and new power quality disturbance analysis model.This model can extract algorithm models such as power disturbance characteristic quantity,fundamental wave amplitude change characteristic quantity and additive disturbance characteristic quantity,realizes signal amplification through Daubechies wavelet transform,and conducts multi-angle analysis of power quality.In this study,through quantitative analysis of power quality characteristics,and through timely acquisition of harmonics,interharmonics and oscillation transient information,the characteristics of power quality are analyzed in a clutter environment.Experiments show that under the influence of different harmonic orders of the h-th order,the power quality evaluation error rate is relatively low,thereby the evaluation performance of the electric energy meter is improved.