Affiliations: [a] State Grid Shanghai Electric Power Research Institute, Shanghai, China | [b] State Grid Shanghai Training Center, Shanghai, China | [c] State Grid Shanghai Maintenance Company, Shanghai, China
Correspondence:
[*]
Corresponding author: Ling Luo, State Grid Shanghai Electric Power Research Institute, Handan Rd 171, Shanghai, 200437, China. Tel.: +86 21 25650304; E-mail: luol@sh.sgcc.com.cn
Abstract: To meet the increasing challenges on global warming and customer demands, the current hierarchical structure of electric power grid is undergoing a rapid change by focusing on high efficiency, reliability and flexibility. To address such challenges, the new concept of smart grid with a sophisticated communication infrastructure has emerged. While power grid systems are based on traditional information architectures at present, the evolving smart grid has a strong need on communication connections among a huge amount of distributed elements, such as generators, substations, monitoring sensors and customers. However, the power industry is facing dilemma that communication resources are limited due to the lack of wireless spectrum resources and the restrictions of wired applications. This paper firstly provides the architecture of the wide-area monitoring system for smart grid by applying a spectrum sensing and sharing technique of cognitive radio, based on an overview of the current communication technologies. Afterwards, the paper presents the feasible application of cognitive communication architecture on the existing power quality monitoring system by combining long-term and short-term monitoring approaches.
Keywords: Smart grid, cognitive radio, communication infrastructure, wide-area monitoring system, power quality
