Abstract
In this paper, we propose a very effectively filtering approach (EFA) to enhance network traffic performance for high-availability seamless redundancy (HSR) protocol in smart grids. The EFA combines a novel filtering technique for QuadBox rings (FQR) with two existing filtering techniques, including quick removing (QR) and port locking (PL), to effectively reduce redundant unicast traffic within HSR networks. The EFA filters unicast traffic for both unused terminal rings by using the PL technique and unused QuadBox rings based on the newly-proposed FQR technique. In addition, by using the QR technique, the EFA prevents the unicast frames from being duplicated and circulated in rings; the EFA thus significantly reduces redundant unicast traffic in HSR networks compared with the standard HSR protocol and existing traffic filtering techniques. The EFA also reduces control overhead compared with the filtering HSR traffic (FHT) technique. In this study, the performance of EFA was analyzed, evaluated, and compared to that of the standard HSR protocol and existing techniques, and various simulations were conducted to validate the performance analysis. The analytical and simulation results showed that for the sample networks, the proposed EFA reduced network unicast traffic by 80% compared with the standard HSR protocol and by 26–62% compared with existing techniques. The proposed EFA also reduced control overhead by up to 90% compared with the FHT, thus decreasing control overhead, freeing up network bandwidth, and improving network traffic performance.
Highlights
The smart grid is a new concept of the next-generation electric power system that has emerged to address challenges of the existing power grid
The horizontal axis of the graph shows the number of unicast frames sent from the source to the destination, and the vertical axis shows the number of network traffic sent from the source to the destination, and the vertical axis shows the number of network traffic frames generated and delivered in the network when the source node sends the unicast frames to the frames generated and delivered in the network when the source node sends the unicast frames to the destination node
high-availability seamless redundancy (HSR) network, effectively filtering approach (EFA) reduces unicast network traffic by 80% compared with the standard HSR protocol, by ~62% compared with the quick removing (QR) technique, by ~60% compared with the port locking (PL) technique, and by ~26%
Summary
The smart grid is a modern electric power grid infrastructure for enhanced efficiency, reliability and safety, with smooth integration of renewable and alternative energy sources, through automated control and modern communications technologies [1]. Smart grids provide more electricity to meet rising demand, increase reliability and quality of power supplies, increase energy efficiency, be able to integrate low carbon energy sources into power networks [3]. The SAS system is used to control, supervise, and protect substations that are strategic nodes in power networks, which consist of large numbers of switchgears and measuring devices [5]. Functions of an SAS are control and supervision, as well as protection and monitoring of the primary equipment and of the grid.
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