Research on Application and Challenges of Large Data in Smart Grid

In recent years, the research work of smart grid has been carried out in all countries in the world. Smart grid has the basic characteristics of information technology, digitization, automation and interaction, its ultimate goal is to become the construction of power system covering the whole production process, including power generation, transmission, substation, distribution, power dispatching and other aspects. It is a security, self-healing, green, reliable system. To achieve safe and reliable operation of smart grid, we must rely on powerful data collection, analysis and processing technology. With the development of Internet technology, especially in recent years, cloud computing, Internet of things and modern communication technology have been rapidly developing to show the arrival of the era of big data. The development of large data technology has injected great vitality into the smart grid, and the convergence of the two is also the trend of the times. This paper introduces the basic concept and characteristics of big data and smart grid, and the key technology of large data acquisition and data fusion technology, protocol technology, data display technology three aspects of big data technology in smart grid application are discussed, and an overview of big data grid applications can face in intellectual challenges. 1 THE RELATIONSHIP BETWEEN BIG DATA AND SMART GRID Smart grid is the direction and development trend of the power industry. Smart grid is a new power grid based on the physical grid, which is highly 1 Haike Liu, Yubao Ren , Lulu Wang, Yuanyuan Xu, State Grid of China Technology College, Second Ring Road No. 500 Jinan Shandong, China integrated with modern advanced sensing measurement technology, communication technology, information technology, computer technology, control technology and physical grid. It covers all aspects of power generation, transmission, transmission, distribution, electricity use and scheduling. In order to ensure efficient operation of all parts of the system, reduce operation costs and environmental impact, we need to coordinate the needs and functions of all stakeholders in the power market, so as to improve system reliability, self-healing and stability. The smart grid is based on high-speed bidirectional communication network integration, manufacturing equipment through advanced sensing and measurement technology, advanced technology, advanced control methods and the application of advanced decision support technology, power grid to achieve reliable and safe, economic, efficient, environmental friendly and safe target. It is generally believed that the characteristics of smart grid include strong, selfhealing, compatibility, economy, integration and optimization. The intelligence of smart grid is highly observable and controllable. The foundation of observation and control is to get information and data reflecting the operation state of the system, and to analyze, process, judge and predict the information and data quickly. The ultimate goal of the smart grid is to provide better services for users (including users of power generation and side users) to meet the needs of user diversity. Moreover, with the development of information and communication technology, smart grid will integrate with the Internet, Internet of things, intelligent mobile terminals and so on to meet users' needs wider. The major data are mainly used in business, finance and other fields, and then gradually extended to transportation, medical, energy and other fields. With the rapid development of smart grid, the large-scale deployment of smart meters and the wide application of sensing and measuring technology, the power industry has produced a lot of data with various structures and complex sources. How to use these data to provide scientific decisions for the development and operation of power grid is the urgent demand for smart grid development, and also the only way to achieve strong, self-healing, compatible, economic, integrated and optimized features of smart grid. It can be said that large data is an important tool for intelligent power grid to be "intelligentized" KEY TECHNOLOGIES OF LARGE DATA APPLICATIONS IN SMART