Smart grid is the core of China’s power grid modernization

China’s smart grid is defined as a strong, smart grid. “Strong” and “smart” are the basic connotations of China’s smart grid construction. “Strong” means building grids with UHV grids as the backbone and coordinated development of all levels of grids. Strong grid, and "smart" is based on this to achieve the grid's informatization, digitization, automation and interaction. The gradual development of smart grid construction will bring a broad market space for domestic power equipment manufacturing companies. The smart grid is an incisive summary of the future development direction of the power grid. At present, China's digital power grid construction can be regarded as the embryonic form of the smart grid. It covers the points of dispatch, dispatch, power transmission, distribution, and users. The components include: Informatization platform. Dispatch automation system, stability control system, flexible AC transmission, substation automation system, microcomputer relay protection, distribution automation system, user management acquisition system, etc.

Smart grid construction is a huge project. The trillions of yuan of investment in the next few years will involve many links in the industry. The main features of the smart grid include digitization and information, distributed intelligence, and interactive dynamics. The digitalization and informationization of smart grids is mainly reflected in the collection and control devices and means of digital data. The online monitoring system of transmission lines can be said to be a microcosm of the development of high-voltage transmission lines in the modern era. The system includes 7 Sub-systems: transmission line video monitoring system, transmission line micro-meteorological online monitoring system, transmission line ice-covering on-line monitoring system, transmission line temperature online monitoring system, transmission line tower tilt on-line monitoring system, on-line monitoring of transmission line wire wind deviation, Transmission line insulator leakage current online monitoring system, etc., can monitor the various conditions of the high-voltage power transmission lines to ensure the safe and reliable operation of the grid, but also through the remote monitoring of the transmission line for effective management.

China will promote the construction of a strong smart grid in three phases. The total investment in the three phases is expected to exceed 4 trillion yuan. From 2009 to 2010, it was a pilot phase for planning, focusing on development planning for "strong smart grids", formulating technical and management standards, conducting key technology R&D and equipment development, and conducting trials for all links; 2011 to 2015 as a comprehensive construction phase Accelerate the construction of UHV power grids and urban and rural power distribution networks, initially form a smart grid operation control and interactive service system, achieve major breakthroughs and extensive application of key technologies and equipment; from 2016 to 2020, lead the upgrade phase and build a unified "strong "Smart grid", technology and equipment have reached the international advanced level.

At present, the Chinese government is studying the development strategy and investment plan of China's smart grid, and the State Grid is also actively preparing to build a smart grid. The smart grid is both the basic model of the next-generation global power grid and the core of the modernization of China's power grid.