The hottest smart grid is in the ascendant

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The development of smart electricity is in the ascendant

the construction of smart electricity will be the main direction of the development of CEC in the next decade. Traditional electricity cannot meet the requirements of the low-carbon economic era because it does not support the access of large-scale intermittent power and distributed power, the transmission loss is huge, and the user side cannot interact. As the full combination of advanced information technology and advanced physical electricity, smart electricity is an ideal solution to the problem of energy transmission in the future, and it is the general trend of future electricity development

the world energy development pattern is undergoing major and profound changes. The goal of the new round of world energy reform is to achieve a low-carbon economy with low-carbon energy as the core through scientific and technological innovation. Major developed countries in the world have taken the development of smart electricity as an important strategic measure to seize the commanding heights of the future low-carbon economy, setting off a global upsurge of smart electricity construction

with the rise of the concept of smart electricity around the world, China National Power Corporation quickly raised smart electricity to the strategic level. In May 2009, it proposed a unified smart electricity plan based on the comprehensive construction of strong electricity with UHV as the backbone and the coordinated development of electricity at all levels, and characterized by informatization, digitization, automation and interaction. In response to this plan, the state power has made a three-step plan, with 2009-2010 as the pilot stage, 2011-2015 as the comprehensive construction stage, and 2016-2020 as the leading and upgrading stage

in August 2009, the first phase of work has been fully launched, focusing on the planning of electric intelligence, the formulation of technical standards and management norms, the research of key technologies and the development of intelligent equipment, and the pilot work of all links. It is reported that certain progress has been made in the first phase of the work

according to the work deployment of national power in 2010, it is expected to invest 227.4 billion yuan in power construction in 2010, with smart power as the focus of investment. According to the goal outlined by the State Grid, by 2020, a strong and intelligent power will be basically built, forming a strong and intelligent power system in North China, East China Hua "3D printing is a new technology, in which UHV synchronous power is the receiving end and northeast and northwest power are the transmission ends, which is a strong power structure connecting the major coal-fired power, hydropower, nuclear power and renewable energy power generation bases in the country.

insiders pointed out that due to the extremely strong compatibility of smart power, it is convenient for wind power, photovoltaic and other new energy to generate electricity, so the bottleneck of wind power generation subject to power dispatching is expected to be broken. Once the bottleneck is overcome, wind power New energy power such as optoelectronics will usher in a new period of development. Therefore, strong smart electricity will become an important platform for China's power system in the future, integrating the future development direction of electricity. UHV, clean energy access, electric automation control and smart meters will all develop on this platform

Figure 1 the national power company held a unified and strong research symposium on smart power construction

UHV is the main theme

in recent years, China's power industry has developed rapidly, cross regional and cross provincial power construction has been promoted rapidly, and the power structure has been strengthened and improved. By the end of 2008, China's installed power generation capacity was 792million kW, and the electricity consumption of the whole society was 3.43 trillion kwh. It is predicted that by 2020, China's power demand will reach 7.7 trillion kWh and the installed power generation capacity will reach 1.6 billion kw, both doubling on the existing basis; At the same time, the distribution of resources and economic development in China are also different. Therefore, China is developing smart electricity to promote the optimal allocation of electric energy across the country and ensure a safe and reliable power supply

China's smart power will take ultra-high voltage power as the backbone. By building strong smart power, we will improve the ability of power to optimize the allocation of resources on a large scale, realize long-distance and large-scale transmission of power, and meet the demand of rapid economic development for power. It is expected that by 2020, China's UHV power will be basically completed, and the transmitted power will reach more than 200million kwh, accounting for 25% of the total installed capacity of the country

guide to complete the preparation of the national robot innovation center. China's vigorous development of UHV is determined by the stage of China's economic development and the characteristics of energy concentration and distribution. China's primary energy distribution and productivity layout are very uneven. The two energy pillars of coal and hydropower, as well as the land wind and solar energy resources that can be developed and utilized on a large scale, are mainly concentrated in the western and northern regions, which are the energy enabling departments for all enterprises in the ecosystem, while the energy consumption demand is mainly concentrated in the economically developed central and eastern regions, and the distance between the load center and large energy bases is mostly more than 1000 km, Moreover, due to the lack of power support in the middle, it is difficult to realize 500 kV AC relay transmission, and UHV transmission is an ideal choice

in addition, the biggest feature of UHV is large capacity and long-distance transmission, which puts forward higher requirements for the construction and characteristics of electricity. In the process of research and construction of UHV, China has constantly explored how to build UHV into electricity with high IQ, so that it is inherently safe, reliable and efficient, and intelligent electricity can meet its needs. Especially after the successful operation of China's first UHV test and demonstration project, China has gained more experience and achievements in the localization of UHV core transmission technology and equipment with long-distance, large capacity and low loss, which has laid a strong foundation for promoting the construction of smart electricity in the future

Figure 2 1000kV Southeast Shanxi Nanyang Jingmen UHV AC test demonstration project

in 2009, the smart power development plan released by the State Grid Corporation of China also stressed that China's smart power is first and foremost a strong power, in which UHV with long-distance and large-capacity transmission characteristics will become the core link. Liuzhenya, general manager of State Grid Corporation of China, said that actively developing smart electricity has become a new trend in the development of power in the world. Being strong is the foundation of smart electricity, and intelligence is the key to the full play of smart electricity. The two complement each other, coordinate and unify

in 2009, the state power started the construction of UHV AC transmission and transformation projects in Huainan Shanghai, Ximeng Shanghai and Northern Shaanxi Changsha, and promoted the construction of Xiangjiaba Shanghai and Jinping Sunan UHV DC projects; At the same time, we will actively promote the development of coal power bases in Huainan, Southeast Shanxi, Ximeng, Northern Shaanxi and Baoqing, hydropower bases in the lower reaches of the Jinsha River, the Yalong River and the upper reaches of the Yellow River, and the bundling and outward transmission of thermal power and wind power bases in Hami and Jiuquan, so as to promote the coordinated development of UHV and energy bases. In 2012, China's UHV AC backbone will begin to take shape

in the whole UHV project layout, Jindongnan Nanyang Jingmen line is only the beginning. According to the next step plan of state power, by the early stage of the 12th Five Year Plan, state power will build two vertical and two horizontal UHV backbone power to transmit the power from coal power bases in Northern Shaanxi and southeastern Shanxi to central and eastern China; Send the power from Mengxi coal power base to North and East China; Send southwest Hydropower to central and eastern China

Ge Zhengxiang, director of the Research Office of the State Power Corporation, said that the use of UHV to speed up the power transmission work of the energy base will soon be implemented. The total investment scale of smart electricity is expected to be close to 4trillion yuan. From 2009 to 2010, the investment was about 550 billion yuan, of which 83 billion yuan was invested in UHV power; The investment in the comprehensive construction stage is about 2trillion yuan, including 300billion yuan in UHV power; The investment in the basically completed stage is 1.7 trillion yuan, of which 250billion yuan is invested in UHV. With the technical support of UHV transmission, the construction of national smart electricity will be launched in a large area from 2010 to 2015, and it is planned to build a unified strong smart electricity by 2020. To this end, the national investment in UHV transmission will exceed 600billion yuan

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