船电技术2025，Vol.45Issue(6)：99-104,6.
基于动态模态分解的电能质量检测方法研究
Research on power quality detection method based on dynamic modal decomposition
李俊逸 1张之宇 1郭嘉琪1
作者信息
- 1. 武汉船用电力推进装置研究所,武汉 430064
- 折叠
摘要
Abstract
To solve the problems caused by transient power quality disturbance,it is necessary to detect and analyze the disturbance signal first.The method proposed in this paper applies dynamic modal decomposition to power quality disturbance detection.It windows the input one-dimensional signal data and reconstructs it into the form of high-order matrix.The singular value decomposition is used to obtain the singular value and singular vector of the matrix to construct the low-dimensional approximate matrix of the system mapping matrix.The dynamic mode components of the signal and the eigenvalues of the corresponding mode components are obtained through the eigenvalue decomposition of the approximate matrix.The amplitude and frequency information of each component of the signal are contained in the mode components and eigenvalues.This method can change the length of window function and adapt to different signal analysis requirements.Small windows are more sensitive to abrupt signal but more susceptible to noise,while large windows have higher noise suppression ability but lower sensitivity to signal.The correctness of the proposed method is verified by simulation experiments.关键词
电能质量/检测分析/动态模态分解Key words
power quality/detection and analysis/dynamic mode decomposition分类
动力与电气工程引用本文复制引用
李俊逸,张之宇,郭嘉琪..基于动态模态分解的电能质量检测方法研究[J].船电技术,2025,45(6):99-104,6.
