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A network scheme for process bus in smart substations without using external synchronization
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DOI：10.1016/j.ijepes.2014.07.066.png)
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Abstract
En 中文
The development of smart substations plays a crucial role in the development of smart grid. The major difference between a smart substation and an existing conventional substation lies in the process bus. Based on a thorough study over the network schemes of sampled values for process bus in smart substations, this paper summarizes and analyses major characteristics of existing network schemes. In order to overcome shortcomings of existing network schemes in time synchronization, the paper proposes a novel network scheme for process bus in smart substations without using external synchronizing clock. Compared to conventional network schemes, the proposed scheme does not need an external global synchronizing clock, thus can significantly improve the reliability of the process bus network. As a major research output of the key technological project, this work has been successfully applied to the 110 kV Shenxiang Substation in Suzhou, China. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords:
Smart grid
Smart substation
Process bus
Ethernet
Network scheme
IEEE 1588
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