Abstract
Smart grids (SGs) have been widely recognized as an enabling technology for delivering sustainable energy transitions. SGs have a positive effect on the development of the world economy and society. SG construction plays an important role in responding to global climate change and promoting the sustainable development of the world economy and society. Under such a background, this paper attempts to investigate patent collaborations of the SG field in China. Based on the application data of collaborative patents from State Intellectual Property Office (SIPO) in China, this study employs complex network theory and social network analysis (SNA) method and conducts in-depth research on the patent collaboration network of SG field in China. The trend of patent collaboration was examined, the collaboration network of SG-related patents was investigated, the network characteristics, and the network structure were also explored. The results show that the proportion of enterprises participating in patent collaboration is relatively large for SG field in China, the percentage of collaboration relationships formed by different patent applicants varies greatly, and that the State Grid Corporation of China (SGCC) plays an important role in patent collaboration in SG field currently. It can also be found that patent collaboration is an effective form of cooperative innovation among different entities. Finally, three suggestions are provided in response to the existing problems.
Highlights
With the rapid development of the global economy, the pressures on resources, environment, and the ecological environment are increasing
The patent data used in this paper are derived from the patent retrieval and analysis system built by the State Intellectual Property Office of China (SIPO), the official department in charge of all the intellectual property of the country
2955 registered collaborative patents are statistically analyzed in chronological order, as shIonwtnhiisnpFaipguerr,e219.5I5t craegnisbteerfeoduncdoltlahbaot rfarotimve2p0a0t7entots2a0r1e6,stthateisntuicmalblyeraonfalcyozoepderinaticvheropnaotelongtsicianl SoGrdfiere,ldashsahsoswhnowinnFaiggurraed1u.aIltucpanwbaerdfotruennddt,hinadt ficroatmin2g0t0h7attoth2e01in6,ntohveantiuomn bcoeor poefrcaotoiopneriantitvheispfiaetledntiss cinonStGinfuieoludshlyassstrheonwgtnhaengirnagd,uaanldupthweanrdumtrbenerdo, ifnidnivceantitniognthpaatttehnetsinenxoceveadtisountciloiotypemraotdioenl pinattehnistsfiteolda liasrcgoenetixnteunotu. sly strengthening, and the number of invention patents exceeds utility model patents to a large extent
Summary
With the rapid development of the global economy, the pressures on resources, environment, and the ecological environment are increasing. The major countries have set up ambitious goals relating to constructing an economical, efficient, safe, and reliable green power grid [3]. In 2006, the green paper “A European Strategy for Sustainable, Competitive and Secure Energy” issued by the European council emphasized that smart grid technology is a key technology and development direction to ensure the power quality of the European grid [10]. In 2008, the U.S Department of Energy indicated that a smart grid uses digital technology to improve reliability, security, and efficiency of the electric system [11]. In the “Made in China 2025” strategic plan, SG construction is once again being emphasized, and SGs are being developed as a key target. It can be seen that developing SGs is of certain importance and inevitability, and it is of strategic significance for promoting social and economic development
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