摘要
针对雷击输电系统发生雷击干扰和雷击故障时无法快速、准确的识别雷击类型,做出有针对性的防雷措施,提出一种综合的雷击类型识别方法。首先,根据雷击暂态电压信号波形的单调性和对称性构造积分判据的方法来识别非故障和故障性雷击;然后,结合暂态电压信号能量特征值的分布特点构造高低频能量比值判据,识别非雷击,雷击和短路故障;针对希尔伯特一黄变换(Hilbert-Huang Transform,HHT)中经验模态分解(Empirical Mode Decomposition,EMD)对原始信号分层时存在的边际效应,模态混叠等问题。将变分模态分解(Variational Mode decomposition,VMD)并与希尔伯特黄变换(Hilbert-Huang Transform,HHT)相结合改进了HHT算法。最后,通过PSCAD仿真验证了改进HHT算法的有效性和雷击类型识别的准确性。
Aiming at the lightning strike and lightning strike failure of lightning strike transmission system,it is difficult to quickly and accurately identify the type of lightning strike,and make targeted lightning protection measures. A comprehensive lightning strike type identification method is proposed. Firstly,the method of constructing the integral criterion based on the monotonicity and symmetry of the lightning transient voltage signal waveform is used to identify the non-fault and fault lightning strikes. Then,the high and low frequency energy ratio criterion is constructed based on the distribution characteristics of the energy characteristic values of the transient voltage signal. Identify non-lightning strikes,lightning strikes,and short-circuit faults;for the marginal effects of the modal layering of the original signal for the Empirical Mode Decomposition( EMD) in Hilbert-Huang Transform( HHT),State aliasing and other issues. The Variational Mode Decomposition( VMD) is combined with the Hilbert-Huang Transform( HHT) to improve the HHT algorithm. Finally,the effectiveness of the improved HHT algorithm and the accuracy of lightning strike type identification are verified by PSCAD simulation.
作者
宋晓星
高艳丰
丁光彬
闫红艳
SONG Xiaoxing;GAO Yanfeng;DING Guangbin;YAN Hongyan(School of Water Conservancy and Hydropower Hebei University of Engineering,Handan 056038,China)
出处
《电瓷避雷器》
CAS
北大核心
2021年第1期96-102,110,共8页
Insulators and Surge Arresters
基金
邯郸市科学技术研究与发展计划项目(编号:1721203048-1)
河北工程大学创新基金项目(编号:17129033052)。
关键词
输电系统
雷击识别
积分判据
能量比值
改进HHT算法
transmission system
lightning strike identification
integral criterion
energy ratio
improved HHT algorithm
作者简介
宋晓星(1993-),男,硕士,研究方向:电气设备状态监测与故障诊断。E-mail:1055877670@qq.com;通讯作者:高艳丰(1979_),男,博士,副教授,研究方向:电气设备状态监测与故障诊断、电力系统运行分析和控制。E-mail:gaoyanfeng01@126.com;丁光彬(1964-),男,教授,研究方向:电气设备状态监测与故障诊断、电力系统运行分析和控制。E-mail:1055877670@qq.com;闫红艳(1980-),女,博士,讲师,研究方向:电气设备状态监测与故障诊断。E-mail:1055877670@qq.com。
