中国电机工程学报2025，Vol.45Issue(17)：6649-6663,中插5-中插6,17.DOI:10.13334/j.0258-8013.pcsee.240344
基于频带能量特征的暂态电流差动保护
Transient Current Differential Protection Based on Frequency Band Energy Characteristics
摘要
Abstract
During the transient phase of faults,the observation window is short,constrained by few parameters,and is full of fault details.Fully exploring these transient fault features is crucial for enhancing the protection performance of modern power systems.This paper proposes a novel principle for the differential protection of AC line currents,based on frequency band energy characteristics.Firstly,the frequency composition of transient differential currents in AC lines is analyzed.Then the practical calculation method for the transient dominant frequency is proposed.Secondly,the disparities in high-and low-frequency energy composition of internal and external faults are analyzed.Based on this analysis,a new principle for transient current differential protection is proposed,which effectively accelerates the speed of current differential protection while ensuring the reliability of the protection scheme.Finally,the proposed protection scheme has been tested by simulation results,RTDS hardware experiments,and actual on-site waveform data,respectively.关键词
继电保护/暂态主频/交流输电线路Key words
relay protection/transient dominant frequency/AC transmission lines分类
信息技术与安全科学引用本文复制引用
王增平,王柄然,王彤..基于频带能量特征的暂态电流差动保护[J].中国电机工程学报,2025,45(17):6649-6663,中插5-中插6,17.基金项目
国家自然科学基金集成项目(U22B6006).Project Supported by National Natural Science Foundation of China(Integration Project)(U22B6006). （U22B6006）
