On April 24, the Southern Power Grid Company released the White Paper on Digital Grid to Promote the Construction of New Energy-based New Electricity System (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, Southern Power Grid Company systematically elaborates the background and significance of the new power system with new energy as the main body, the new situation and new requirements, as well as the three significant features of "digital empowerment, flexible and open, green and efficient". Southern Power Grid will build a new power system with new energy sources as the mainstay by relying on the digital grid construction and taking multiple measures to serve the carbon peak and carbon neutral strategic goals.

Digital empowerment: providing "core algorithm" for efficient new energy consumption

According to the white paper, the new power system will present a deep integration of digital and physical systems, with data flow leading and optimizing energy flow and business flow. With data as the core production factor, the power supply, grid, load, energy storage information, power generation side (power plants, etc.) to achieve a "comprehensive view, accurate measurement, highly controllable", power grid side (grid enterprises) to form a cloud and edge integration of regulation and control system, the power side (electricity users) to effectively aggregate a large number of adjustable resources to support Real-time dynamic response.

The white paper introduces the strategic deployment of the digital grid construction proposed by the Southern Power Grid Company in 2019. Digital grid is a new energy ecosystem formed by cloud computing, big data, Internet of Things, mobile Internet, artificial intelligence, blockchain and other new generation digital technologies as the core driver, data as the key production factor, modern power and energy network and new generation information network as the basis, through the deep integration of digital technology with energy enterprise business and management, and continuously improve the level of digitalization, networking and intelligence It is a new energy ecosystem with flexibility, openness, interactivity, economy and sharing, making the grid more secure, reliable, green, efficient and intelligent.

The digital grid will become the best form to carry the new power system. Southern Power Grid relies on strong "power + computing power", through massive information data analysis and high performance computing technology, through the data relationship to discover the grid operation rules and potential risks, to achieve safe and stable operation of the power system and the optimization of resource allocation, so that the grid with super perception, intelligent decision-making ability and fast implementation capabilities. This gives Guangdong, Guangxi, Yunnan, Guizhou, Hainan five provinces and regions of clean energy consumption and consumption pressed the "fast-forward button".

By the end of 2020, the proportion of installed non-fossil energy and electricity in the five provinces and regions will reach 56% and 53% respectively, ranking among the top in the world, and the utilization rate of wind power and photovoltaic power generation will reach 99.7%.

The white paper proposes that the Southern Power Grid Company will accelerate the construction of digital power grids, continue to build and improve a series of digital business technology platforms, so that they have strong data management capabilities, super computing power and the ability to drive business with data; accelerate the digital transformation of power grid management, promote efficient coordination of power grid planning, construction, operation and maintenance, materials, scheduling, marketing and other multi-professionals, improve the efficiency of business operations, to ensure that the level of service for We will increase investment in the construction of new infrastructure such as 5G base stations, Internet of Things and electric vehicle charging piles; connect to the national industrial Internet and digital government, make full use of the advantages of grid enterprises in computing power, algorithms and data resources, promote close interaction between the government, industry upstream and downstream and users, guide the orderly flow of energy, data and services, and promote the energy ecosystem Stakeholders open cooperation, mutual benefit and symbiosis, and collaborative innovation.

Flexible and open: supporting new energy to become the main power source

The white paper argues that in the new power system, the role of the grid as the core hub for consuming a high percentage of new energy is even more significant. The flexible interconnection form of "cross-provincial trunk grid + small and medium-sized regional grid + distribution network and micro-grid" and digital regulation technology will make the grid more flexible and controllable, so that new energy can be widely accessed according to the resource endowment. The flexible interconnection of large power grids will promote the further improvement of resource sharing ability, and the distribution grid will show a variety of forms of hybrid AC/DC flexible grid and micro-grid development, while the smart micro-grid, as an important solution to improve power supply reliability and high penetration of distributed power supply to the grid, will be gradually promoted and applied in urban centers, industrial parks and remote areas. In addition, new energy + energy storage, new energy + load + energy storage and other new modes of coordinated development will also continue to emerge.

At present, Southern Power Grid has formed "eight interchange and ten transmission channels", with a transmission scale of 58 million kilowatts and an annual electricity transmission of 230 billion kilowatt-hours, and has independent high-capacity ultra-high voltage multi-terminal flexible DC transmission technology. leading position in the planning, construction and operation technology and practice of large AC/DC power grids. At the same time, it is promoting the construction of digital scenarios such as transmission and distribution line drones, digital substations, smart distribution rooms, smart microgrids and smart parks, and artificial intelligence is widely used in grid equipment inspection, smart customer service, load forecasting and other businesses.

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

The white paper proposes that the Southern Power Grid Company will continue to use digital technology to build a strong main grid and flexible distribution network; coordinate the use of wind power, photovoltaic, biomass and other regional distributed energy resources, build AC-DC hybrid distribution networks and smart microgrids according to local conditions, continue to strengthen the digitalization and flexibility of the distribution network, and improve the carrying capacity of distributed power sources.

During the "14th Five-Year Plan" and "15th Five-Year Plan" period, the Southern Power Grid Company will promote the installation of 100 million kilowatts of new scenery energy in each of the five southern provinces and regions, and the installation of new energy will increase from the current 0.5 billion kilowatts to 250 million kilowatts by 2030, supporting the early realization of Carbon peaking.

The white paper also proposes that the Southern Power Grid Company vigorously implement the innovation-driven strategy to enhance the construction of a new power system of scientific and technological support and industrial power. Southern Power Grid Company will actively carry out basic research on new power system operation mechanism and development form, data-driven new power system analysis and control based on basic theories and methods, achieve breakthroughs in large-scale grid integration and consumption of new energy generation, digital power grid, special chips for power, flexible interconnection of power grid, advanced energy storage technology, virtual power plants, promote the deep integration of digital technology and power technology, and build Support the national innovation platform of new power system, and form the key technology and standard system of new power system with China's independent intellectual property rights. Accelerate the realization of key areas of core technology independence and upgrading, and promote the formation of a complete and international first-class level of the power industry chain.

Green and efficient: big data technology to help users tap the energy-saving potential

According to forecasts, by 2030 and 2060, China's new energy generation will account for more than 25% and 60%, respectively, and the power supply will move toward the gradual realization of zero carbon. According to the white paper, new energy will become the main source of new power and dominate the power supply structure.

The process of "new electrification" of terminal energy consumption will also be accelerated. The level of electrification of end-use energy in the three major fields of industry, construction and transportation will increase from the current 30%, 30% and 5% to about 50%, 75% and 50% by 2060, and the rapid development of the digital economy will also drive the level of electrification of end-use energy to further increase.

As the role of new energy and traditional power sources changes, an effective and complete power market is needed to coordinate the interests of different market players in a more efficient way and to realize the full input and optimal allocation of all factor resources.

The white paper proposes that the Southern Power Grid Company will use digital technology to promote the energy consumption revolution and the formation of a green production and lifestyle. During the "13th Five-Year Plan" period, Southern Power Grid continues to promote electric energy substitution, making positive progress in key areas such as electric boilers, electric storage and cooling, port shore power, etc. The total amount of electricity substituted in the "13th Five-Year Plan" will be about 100 billion kWh, and the share of electric energy in terminal energy consumption in five provinces and regions will reach 32% in 2020. The proportion of energy consumption in the five provinces and regions will reach 32% in 2020, 4 percentage points higher than in 2015. At the same time, the southern region (starting with Guangdong) power spot market and regional frequency regulation auxiliary services market in the country to take the lead in the trial operation of the settlement, power market construction in the forefront of the country.

Southern Power Grid will use digital technology to build a modern power supply service system to adapt 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 to aggregate a large amount of user-side adjustable resources, vigorously build virtual power plants, guide users to use electricity rationally, and promote two-way interaction between the power generation side and the load side.

Southern Power Grid Company will also assist users to explore energy saving potential through big data technology, promote energy consumption from a single, passive and generalized utilization mode to an efficient utilization mode that integrates multiple demands, active participation and customization, promote the development of electric vehicles, electric energy substitution, energy saving and emission reduction, and comprehensive energy services; accelerate the construction of a unified power market in the southern region, enrich the varieties of power market transactions, and explore Flexible and diversified market-oriented demand response transaction mode.