电力系统及其自动化学报2016，Vol.28Issue(10)：24-30,7.DOI:10.3969/j.issn.1003-8930.2016.10.005
基于改进ITD边际谱熵的单相自适应重合闸
Single-phase Adaptive Reclosure Based on Marginal Spectrum Entropy Using Improved ITD
摘要
Abstract
An improved intrinsic time-scale decomposition(ITD)algorithm is presented:for waveform distortion,ratio⁃nal spline function interpolation and extrapolation at extreme points are introduced;for false weight,the energy criteri⁃on is added as the termination condition for iteration. The improved ITD algorithm and marginal spectrum entropy are combined to distinguish the single-phase ground fault types for high-voltage transmission line:first,ITD decomposes two faults with arc voltage to obtain the marginal spectrum,then the characteristics of marginal spectrum are compared, and the difference in the marginal spectrum of fault phase voltages from time-frequency domain is revealed;according to the information entropy principle,the ITD marginal spectrum entropy can distinguish between two fault types rapidly and accurately. The results show that when the transmission line is with transient fault,the entropy value is greater than 0.2;and with permanent fault,the entropy value is less than 0.2. The simulation results of transmission line with single-phase ground fault demonstrate that the proposed algorithm is effective and feasible.关键词
单相自适应重合闸/固有时间尺度分解/边际谱熵/瞬时性故障/永久性故障Key words
single-phase adaptive reclosure/intrinsic time-scale decomposition(ITD)/singular spectrum entropy/transient fault/permanent fault分类
信息技术与安全科学引用本文复制引用
周超,黄纯,江亚群,杜培伟,朱永强,康志豪..基于改进ITD边际谱熵的单相自适应重合闸[J].电力系统及其自动化学报,2016,28(10):24-30,7.基金项目
国家高技术研究发展计划（863计划）资助项目(2012AA050215)；国家电网公司科技资助项目(5216A313500N) （2012AA050215）
