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Indexed by:期刊论文

Date of Publication:2012-07-01

Journal:International Journal of Advancements in Computing Technology

Included Journals:EI、Scopus

Volume:4

Issue:13

Page Number:217-224

ISSN No.:20058039

Abstract:Electronic current transformers (ECTs) and electronic voltage transformers (EVTs) play important roles in Substation Automation Systems (SAS). In this paper, we focus on the digital communication and the time synchronization relating to the electronic transformer. At the aspect of the digital communication, according to the limitation on the communication flexibility in the standard IEC 61850-9-2LE, the idea of the distributed sampled value control block (SVCB) is presented, as well as the communication protocol between the distributed systems is specified. In order to reach the highly accurate time synchronization, the digital phase-shifter and phase-equalizer are used to compensate the phase displacement of signal samples and ensure the maximum phase linearity and constant group delay. The test shows that the method proposed in this paper is feasible.