the "Four Foundations" of a Strong Power Grid

At present, the development and evolution of new energy systems and new power systems are characterized by a long time span and strong uncertainty. It is a complex systematic project to coordinate the safe supply of energy and power with high quality and clean and low-carbon transition, and multi-objective coordination is crucial in the transition period. The new power grid is the core platform for the construction of a new power system and a new energy system. Centering on the construction of the backbone grid, the coordination of power grids at all levels, the drive of information technology and the empowerment of digital intelligence development, it continues to consolidate its four major foundations and is the key to creating a strong digital intelligence power grid.

First, strengthen the construction of UHV and UHV backbone grids, that is, guided by the concept of large energy, based on the energy demand and energy resource endowment characteristics of high-quality economic and social development, continue to improve the backbone grids that meet the requirements of optimizing the allocation of multi-energy resources in a large range and flexible scheduling, and consolidate the physical foundation of digital intelligent power grid construction.

On the one hand, continue to improve the backbone grid structure, and give full play to the value of UHV power grid energy allocation platform. Implement the requirements and deployment of the national development plan for large-scale wind power photovoltaic bases focusing on desert, Gobi and desert areas, adhere to the "trinity" of large-scale wind power photovoltaic bases, advanced coal power and UHV channels, make every effort to do a good job in the study of base delivery and power grid development pattern, extend the main grid frame in North China and Northwest to the desert base, and improve the main grid structure in Northwest and Northeast. Speed up the construction of Sichuan-Chongqing UHV AC main grid to support the safe and efficient operation of cross-region DC. On the other hand, it is necessary to coordinate the grid and renewable energy planning, strengthen the coordination of conventional power supply and grid structure supporting construction, and optimize the layout, scale and timely sequence of renewable energy development. In combination with factors such as renewable energy resource endowments, safe operation of power grids, and equipment and technology levels, the development of centralized and distributed energy should be scientifically planned to support extensive and flexible access to centralized and distributed energy sources. Optimize pumped storage, electrochemical energy storage and other flexible power supply planning and configuration, and enhance the power grid's capacity to absorb renewable energy. We will continue to improve trans-provincial and trans-regional power transmission capacity, realize the allocation of renewable energy resources in a wider range, and improve the level of consumption and utilization. Improve the level of grid-connected management of distributed power sources, improve the quality and efficiency of transaction management, implement differentiated management of grid-connected service processes and grid-connected operation technical requirements, and guide the optimal layout of distributed renewable energy sources.

Second, promote the coordinated development of power grids at all levels, that is, to adapt to the high proportion of renewable energy power system "source and load interaction" balance mode as the goal, optimize the development rhythm and layout of power grids at all levels, improve the capacity of carrying high proportion of renewable energy transmission and consumption, multi-DC feed capacity, distributed new energy grid connection capacity, etc., to achieve flexible mutual benefit and coordinated operation of transmission grid, distribution grid and micro-grid.

On the one hand, promote the realization of a clear structure and a clear function of the power grid architecture at all levels. Construction, expansion and improvement of UHV backbone network, optimization of 500 (750) kV power grid, achieve reasonable stratification, improve the transmission capacity of important sections, improve the 220 (330) kV power grid, gradually form a double-circuit power supply and ring network structure around the load center, improve the power supply capacity and reliability level, and achieve flexible and reliable power supply. And accelerate the construction of water and fire landscape resource optimization allocation platform, improve the acceptance of clean energy capacity. On the other hand, improve the ability of power grids at all levels to support the convergence and integration of various innovative factors and resources. As the energy system evolves to the energy Internet, it is necessary to give full play to the advantages of deep coupling between the digital industry and the energy and power industry, rely on market mechanism optimization and other ways to stimulate the interconnection of various resources and innovative factors, synchronously strengthen data sharing and value mining, and build energy big data centers and energy industry cloud networks. We will expand new businesses, models and formats such as multi-energy and complementary clean energy bases, source-grid, charge-storage integration projects, comprehensive energy services, smart microgrids, and virtual power plants.

Third, to realize the comprehensive drive of modern information technology such as "big cloud material transfer intelligent chain", that is, relying on modern information technology, to realize the information sharing and capacity complementation of various subjects in all links of the source network, fully release the huge efficiency and benefit space contained therein, effectively implement the comprehensive saving strategy, and build a strong digital intelligent power grid in a more efficient way

On the one hand, comprehensively improve the dispatching and control ability of large power grids. The wide application of digital technology can realize the all-round perception of the electricity volume, state quantity, physical quantity, environmental quantity, spatial quantity and behavioral quantity of massive new energy equipment, and effectively improve the prediction accuracy of new energy power generation output, the intelligent level of operation regulation and operation and maintenance ability through big data analysis and intelligent decision-making, so as to ensure the safe and stable operation of the new power system. It is necessary to establish a complex large-scale power grid simulation platform with multiple time scales, wide geographical scope and fast response speed, and build a dispatching control system with panoramic perception and global control, and effective coordination among main network, distribution network and distributed microgrid. On the other hand, to improve the digital level to help new energy friendly grid connection. The use of modern information technology to build new energy cloud and other industrial Internet platforms, through the scientific analysis and rational utilization of new energy power generation data, effectively promote the scientific planning, reasonable development, efficient construction, safe operation, and full consumption of new energy power generation such as wind power, solar power generation. Relying on the green electricity trading platform, support the green electricity trading business, meet the green electricity consumption needs of market players, stimulate the enthusiasm of market players to participate in green electricity trading, and effectively support the realization of the "double carbon" goal.

Fourth, adhere to the digital intelligent green development, that is, on the basis of digital transformation, with intelligent development as a means, with green development as the goal, to achieve scientific supply to meet the reasonable needs of economic and social development and people's production and life

On the one hand, electricity can fully reflect the production and life style of human society and development demands, adhere to the digital intelligent green development, will drive the energy field to achieve a comprehensive jump in value, reflecting more prominent data value, service value and platform ecological value. Based on the comprehensive transformation and enabling upgrade of the energy and power system based on digital technology, in the data interaction and sharing of the power and economic and social systems, the data is driven by new products and new models around the power big data operation, 5G and geographic information spatio-temporal services, and scene innovation applications based on blockchain technology. Based on the profound transformation from resource provider to service provider, electric power will promote the formation of a more open and flexible energy Internet development environment, and give birth to new market players such as data integrators, operating retailers, integrated service providers, and financial service providers, providing a series of energy and power services based on information value-added to meet the diversified, personalized and interactive needs of users. On this basis, to promote the formation of energy industry Internet, electric carbon resource comprehensive allocation platform and other new industrial ecology, fully stimulate the ecological value of the electric power platform. The open and inclusive power grid operation system with digital transformation will achieve effective aggregation of internal and external resources in key links, achieve optimal allocation of resources and efficient collaborative interaction of business, and stimulate the emergence of new models and new business forms of power grid development.

On the other hand, from the broader dimension of economy and society, more efficient coordination between supply and demand will be achieved, and effective advance guarantee and service capacity will be provided for economic and social development. Continue to strengthen the coordination of various types of energy such as vertical source network load and storage links, horizontal electric heating gas cooled hydrogen, etc., to meet the convenient access of various power facilities, plug and play, and take multiple measures to support the safe operation and effective consumption of renewable energy power generation. At the same time, through the real-time interaction between the development status quo, trends and outstanding demands of various economic and social fields and the power field, the digital intelligent strong grid can be promoted to become a leader in the comprehensive green transformation of economic and social development.

【 Practical Case 】

State Grid smart car networking platform

The State Grid Company resolutely implements the decision-making and deployment of the Party Central Committee, fully shoulders the responsibility of energy backbone central enterprises, fully invests in and promotes the layout of charging infrastructure, and actively serves the development of the new energy automobile industry. The "ten vertical and ten horizontal two ring" expressway fast charging network has been built, covering more than 50,000 kilometers of expressways; Build and operate the National Grid smart vehicle networking platform with the widest coverage and the strongest service capability in the world. As of August 2023, the smart car networking platform is providing convenient and intelligent charging and replacing services for more than 11.6 million users' green travel. The platform continues to improve its open and sharing capabilities, promote the interconnection of charging operators, and provide charging services such as intelligent recommendation, station (pile) navigation, plug and charge, non-inductive payment, and battery safety monitoring for car owners, achieving "one APP to travel all over China". By mining the high-quality development of the intelligent car networking platform's massive "car pile network" data service industry, it provides big data services such as station construction planning, operation analysis, and intelligent operation and maintenance for charging operators. Rely on the smart vehicle networking platform to build a load aggregation operation system, and provide channels for all kinds of charging facilities to participate in green electricity trading, demand response, and grid auxiliary service markets.

State Grid Fujian Electric Power has built a multi-component clean energy supply system

Relying on a complete range of clean resources in the province, State Grid Fujian Electric Power has formed a complementary supply system of water, nuclear, wind and light multiple clean energy sources, and has become an important clean energy base in the southeast coastal areas of China. In 2022, Fujian's installed clean energy capacity and power generation accounted for 60.3% and 54.5%, respectively, 4.1 and 12.9 percentage points higher than the national average, and maintained 100% clean energy consumption for many years in a row.

Jiangsu Sutong GIL integrated pipe corridor project

The project starts from Suzhou docking station on the south bank of the Yangtze River and ends at Nantong docking station on the north bank. It crosses the Yangtze River through two GIL laid in the pipeline corridor. The tunnel length is 5468.5 meters, the GIL length is 34.2 kilometers, and the project investment is 4.8 billion yuan. The project uses "compact UHV GIL+ large diameter long distance underwater tunnel" to cross the Yangtze River, representing the international leading level of UHV transmission research and development, electrical equipment manufacturing, deep water tunnel construction and other fields, and greatly improves the power receiving capacity of East China power grid.

Qinghai - Henan ±800 kV UHVDC transmission project

The project starts in Hainan Tibetan Autonomous Prefecture, Qinghai Province, and ends in Zhumadian, Henan Province, with a designed power transmission capacity of 8 million kilowatts and a transmission line length of 1578 kilometers, with an investment of 22.3 billion yuan. The project has set a number of world firths: the first large-scale transmission of electric energy based on new energy, the first entry into the construction of an altitude of 3,000 to 4,000 meters, the first research and development and application of the upgraded version of UHV transmission technology, the first use of 800 kV converter substation on-site assembly scheme.

We will deepen the construction and application of big data centers for energy

As a new production factor, data has been rapidly integrated into the production, circulation, consumption and other links in all walks of life, and has become one of the important resources in today's society. State Grid Corporation plays the role of "major power" and "pillar", deeply explores the potential value of data in the energy field, promotes the State Grid Henan, Chongqing, Ningxia, Xinjiang and other companies to continue to deepen the construction and application of energy big data centers, strengthens the integration and integration of big data in the energy field, and improves the ability of energy data convergence and sharing. To provide strong and reliable energy data support for the high-quality economic and social development of all regions.

Article source: China Energy storage network