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论文类型：期刊论文

发表时间：2012-07-15

发表刊物：Journal of Computational Information Systems

收录刊物：EI、Scopus

卷号：8

期号：14

页面范围：5885-5892

ISSN号：15539105

摘要：Electronic current transformers (ECTs) and electronic voltage transformers (EVTs) play important roles in Substation Automation Systems (SAS). In this paper, we focus on the time synchronization relating to the electronic transformer. In order to reach the highly accurate time synchronization, a two-stage synchronization scheme is proposed to overcome the signal delay. In the first stage, the digital phase- shifter and phase-equalizer are used to compensate the phase displacement of signal samples in a large range and ensure the maximum phase linearity and constant group delay. In the second stage, the signal phase angle is fine-tuned in a small range by employing a second-order interpolation algorithm. The test shows that the method proposed in this paper is feasible. ? 2011 by Binary Information Press.