南方电网技术2025，Vol.19Issue(5)：102-110,9.DOI:10.13648/j.cnki.issn1674-0629.2025.05.010
基于多重分形谱多项式拟合的雷击与故障识别方法
Lightning Strike and Fault Identification Method Based on Polynomial Fitting of Multifractal Spectrum
摘要
Abstract
In order to solve the problem that the protection of high voltage direct current(DC)transmission lines is susceptible to lightning interferences,a new method for the identification of lightning interferences and faults on DC transmission lines based on the quadratic polynomial fitting of the multifractal spectrum is proposed,which is the first time that the multifractal algorithm is applied to distinguish between lightning strikes and in-area faults.The method achieves the identification of lightning interference and fault conditions by calculating the multifractal spectrum of the voltage transient signals and using the coefficients of the highest terms of its quadratic polynomial fitting function to characterise fluctuation of the voltage signals.Simulation results show that the method can not only accurately identify lightning interferences and faults,but also identify them quickly.In addition,the polynomial fitting coef-ficients can better characterise the fluctuation differences of different signals.Therefore,the method can be used as an auxiliary criterion for high voltage DC transmission lines protection,which is of great significance for further improving the reliability of DC transmission lines protection.关键词
雷击干扰/多重分形谱/多项式拟合/故障识别/辅助判据Key words
lightning interference/multifractal spectrum/polynomial fitting/fault identification/auxiliary criterion分类
动力与电气工程引用本文复制引用
刘艳云,贾文超,高岩,姜延卓,戴志辉,梁英..基于多重分形谱多项式拟合的雷击与故障识别方法[J].南方电网技术,2025,19(5):102-110,9.基金项目
国家自然科学基金资助项目(51877084) （51877084）
河北省自然科学基金资助项目(E2018502063).Supported by the National Nature Science Foundation of China(51877084) （E2018502063）
the Natural Science Foundation of Hebei Province(E2018502063). （E2018502063）
