China Southern Power Grid: Digital Power Grid promotes the construction of a new power system with new energy as the main body

Polaris power transmission and distribution network: On April 24, China Southern Power Grid Corporation released the White Paper on Digital Power Grid Promoting the Construction of New Power Systems with New Energy as the Main Body (hereinafter referred to as the White Paper) in Guangzhou.

"The digital grid will become the best form to carry the new power system." In the white paper, China Southern Power Grid Corporation systematically elaborated the background and significance of the new power system with new energy as the main body, the new requirements of the new situation and the three prominent features of "digital empowerment, flexible and open, green and efficient". China Southern Power Grid Corporation will rely on the construction of the digital grid and take multiple measures to build a new power system with new energy as the main body, Serve the realization of carbon peak and carbon neutral strategic objectives.

Digital empowerment: provide "core algorithm" for efficient consumption of new energy

The white paper believes that the new power system will present the deep integration of digital and physical systems, and lead and optimize the energy flow and business flow with data flow. With data as the core production factor, the information of power supply, power grid, load and energy storage can be accessed, and the power generation side (power plant, etc.) can achieve "comprehensive and observable, accurate and measurable, and highly controllable". The power grid side (power grid enterprise) forms a control system integrating cloud and edge, and the power consumption side (power user) effectively aggregates massive adjustable resources to support real-time dynamic response.

According to the white paper, China Southern Power Grid Corporation studied and proposed the strategic deployment of digital power grid construction in 2019. The digital grid is a new energy ecosystem formed by taking cloud computing, big data, the Internet of Things, mobile Internet, artificial intelligence, blockchain and other new generation digital technologies as the core driving force, taking data as the key production factor, taking modern electric power energy network and the new generation information network as the basis, and continuously improving the level of digitalization, networking and intelligence through the deep integration of digital technology and energy enterprise business and management, It has the characteristics of flexibility, openness, interactivity, economy and sharing, making the power grid more safe, reliable, green, efficient and intelligent.

Digital power grid will become the best form to carry the new power system. Relying on the powerful "power+computing power", China Southern Power Grid discovers the operation rules and potential risks of the power grid through massive information data analysis and high-performance computing technology through data relations, and realizes the safe and stable operation of the power system and the large-scale optimal allocation of resources, so that the power grid has strong perception ability, intelligent decision-making ability and rapid implementation ability. This has pushed the "fast forward" button for the consumption and consumption of clean energy in Guangdong, Guangxi, Yunnan, Guizhou and Hainan.

By the end of 2020, the proportion of non-fossil energy installed capacity and electricity in five provinces and regions will reach 56% and 53% respectively, ranking the top in the world. The utilization rate of wind power and photovoltaic power generation will reach 99.7%, and the transformation of regional energy structure has achieved remarkable results.

The white paper proposes that China Southern Power Grid Corporation will accelerate the construction of digital power grid, continue to build and improve a series of digital business technology platforms, and make them have strong data management capabilities, super computing capabilities and data-driven business capabilities; Accelerate the digital transformation of power grid management, promote the efficient collaboration of power grid planning, construction, operation and maintenance, materials, dispatching, marketing and other disciplines, improve the operation efficiency of enterprises, and ensure the efficient service level for many new energy customers; Increase the supporting investment in the construction of new infrastructure such as 5G base stations, the Internet of Things and electric vehicle charging piles; Connect well with the national industrial internet and digital government, make full use of the advantages of power grid enterprises in computing power, algorithms and data resources, promote the close interaction between the government, upstream and downstream of the industry and users, guide the orderly flow of energy, data and services, and promote the open cooperation, mutual benefit, symbiosis and collaborative innovation of stakeholders in the energy ecosystem.

Flexible and open: support new energy as the main power source

According to the white paper, in the new power system, the power grid plays a more prominent role as the core hub for absorbing high proportion of new energy. The flexible interconnection form and digital control technology of "trans-provincial trunk power grid+small and medium-sized regional power grid+distribution network and microgrid" will make the power grid more flexible and controllable, and realize the wide access of new energy according to resource endowment and local conditions. The flexible interconnection of the large power grid promotes the further improvement of the ability of mutual aid and sharing of resources. The distribution network presents a trend of coordinated development in various forms, such as the AC/DC hybrid flexible grid and the microgrid. As an important solution to improve the reliability of power supply and the high permeability of distributed power grid connection, the smart microgrid will be gradually promoted and applied in urban centers, industrial parks, remote areas, etc. In addition, new models of multiple coordinated development such as new energy+energy storage, new energy+load+energy storage will also emerge.

At present, China Southern Power Grid has formed a "eight alternating current and ten continuous" transmission channel, with a power transmission scale of more than 58 million kilowatts and an annual power transmission capacity of more than 230 billion kilowatt-hours. China Southern Power Grid has developed its own large-capacity UHV multi-terminal flexible DC transmission technology, and is in a leading position in the planning, construction and operation technology and practice of large AC and DC power grids. At the same time, we will promote the construction of digital scenes such as unmanned aerial vehicle inspection of power transmission and distribution lines, digital substations, intelligent distribution rooms, smart micro-grid, smart parks, etc. AI is widely used in power grid equipment inspection, intelligent customer service, load forecasting and other businesses.

China Southern Power Grid Corporation will rely on digital technology to enhance the "observable, measurable and controllable" level of new energy, promote the power system to have a sharper "five senses" and a smarter "brain", and support new energy power generation equipment to participate in the power system regulation process as the main power source.

According to the white paper, China Southern Power Grid will continue to use digital technology to build a strong main grid and flexible distribution network; Make overall use of regional distributed energy resources such as wind power, photovoltaic, biomass, etc., build AC/DC hybrid distribution network and smart microgrid according to local conditions, continue to strengthen the level of digitalization and flexibility of distribution network, and improve the bearing capacity of distributed power.

During the "Fourteenth Five-Year Plan" and "Fifteenth Five-Year Plan", China Southern Power Grid Corporation will promote the installation of 100 million kilowatts of wind and new energy in the five provinces and regions of the South respectively, and the installed capacity of new energy will increase from 50 million kilowatts to 250 million kilowatts by 2030, supporting the realization of carbon peak ahead of schedule.

The white paper also proposes that China Southern Power Grid Corporation will vigorously implement the innovation-driven strategy to strengthen the scientific and technological support and industrial belt power of building a new power system. China Southern Power Grid Corporation will actively carry out basic research on the operation mechanism and development form of the new power system, the basic theory and method of the analysis and control of the new power system based on data-driven, and achieve breakthroughs in the large-scale grid connection and consumption of new energy generation, digital grid, power dedicated chips, flexible interconnection of power grids, advanced energy storage technology, virtual power plants, and other aspects, and promote the deep integration of digital technology and power technology, Build a national-level innovation platform to support the new power system, and form a key technology and standard system of the new power system with China's independent intellectual property rights. Accelerate the realization of independence and upgrading of core technologies in key fields, and promote the formation of a complete and world-class power industry chain.

Green and efficient: Big data technology helps users tap energy saving potential

It is predicted that by 2030 and 2060, the proportion of new energy power generation in China will exceed 25% and 60% respectively, and the power supply will move towards zero carbonization. The white paper believes that new energy will become the main body of new power supply and play a leading role in the power supply structure.

The "new electrification" process of terminal energy consumption will also be accelerated. The electrification level of terminal energy use in industry, construction and transportation will increase from 30%, 30% and 5% at present to about 50%, 75% and 50% by 2060. The rapid development of digital economy will also promote the further improvement of the electrification level of terminal energy use.

With the transformation of the role of new energy and traditional power sources, effective and complete power market support is needed to more effectively coordinate the interests of different market entities and realize the full investment and optimal allocation of all factor resources.

The white paper proposes that China Southern Power Grid Corporation will use digital technology to boost the energy consumption revolution and promote the widespread formation of green production and lifestyle. During the "13th Five-Year Plan" period, China Southern Power Grid continued to promote the substitution of electric energy, and made positive progress in key areas such as electric boilers, electric cooling storage, and port electricity. During the "13th Five-Year Plan" period, the cumulative substitution of electric energy was about 100 billion kilowatt-hours. In 2020, the proportion of electric energy in the five provinces and regions accounted for 32% of the terminal energy consumption, up 4 percentage points from 2015. At the same time, the southern region (starting from Guangdong) power spot market and regional FM auxiliary service market took the lead in carrying out settlement and trial operation in the country, and the construction of power market took the lead in the country.

China Southern Power Grid Corporation will use digital technology to build a modern power supply service system adapted to the new power system, improve service efficiency and customer experience, support business innovation, and help users continuously release their demand potential; Through the Internet of Things and blockchain technology, we can aggregate massive user-side adjustable resources, vigorously build virtual power plants, guide users to use electricity reasonably, and promote two-way interaction between the generation side and the load side.

China Southern Power Grid will also help users tap energy conservation potential through big data technology, promote the transformation of energy consumption from a single, passive and universal utilization mode to a highly efficient utilization mode that integrates multiple needs, active participation and customization, and promote the development of electric vehicles, electric energy substitution, energy conservation and emission reduction, and comprehensive energy services; We will accelerate the construction of a unified power market in the southern region, enrich the variety of power market transactions, and explore flexible and diverse market-based demand response trading models.