电测与仪表2016，Vol.53Issue(16)：45-49,5.
基于迭代稀疏分解的介损角测量方法
Dielectric loss angle measurement method based on interative sparese decomposition
摘要
Abstract
The non synchronous sampling and field noise have great influence on the accuracy of the dielectric loss tangent, for which, a new method for measuring dielectric loss angle (DLA) based on iterative sparse decomposition is proposed in this paper.To improve the calculation accuracy of the dielectric loss angle, the input signal can be ex-pressed as the signal component and form of a small amount of signals, and then, the fundamental phase is obtained by matching the optimal atom with the signal wave.In the situations, under the condition of fundamental frequency fluctuation, real value of DLA variance, changing of harmonic component and white noise influence, the DLA meas-urement results were obtained through simulation experiments by the method proposed in this paper, and the DLA re-sults were calculated by Blackman self -convolution window (BSCW) and triple-spectrum-line interpolation and high-er-order sine fitting algorithm with the Hanning-windowed interpolation.The results show that the DLA measurement method presented in this paper has a better accuracy and efficiently overcomes the shortage of spectrum leakage and fence effect.关键词
介损角/稀疏分解/迭代匹配追踪/测量方法Key words
dielectric loss angle/sparse decomposition/iterative matching pursuit/measurement method分类
信息技术与安全科学引用本文复制引用
律方成,李敏..基于迭代稀疏分解的介损角测量方法[J].电测与仪表,2016,53(16):45-49,5.基金项目
国家高技术研究发展计划（863计划）资助项目（2012AA050802）；中央高校基金项目（13MS73）；国家电网公司科技项目 （）
