Features of new power system with new energy as the main body

3, highly electrified terminal load multiple interaction

In the future terminal energy consumption structure, the level of electrification continues to improve, and electric energy has gradually become the most important energy consumption variety. According to the forecast of relevant agencies, the dominant position of 2025 fees, the proportion of electric energy in terminal energy consumption is expected to reach about 45% and 70% in 2035 and 2060. Around to meet the people's yearning for a better life, the wide application of electric energy replacement, electric vehicles, clean heating, rooftop photovoltaic, household energy storage equipment and smart home electricity load is developing in a diversified direction.

In the context of the energy Internet, the new model of both consumers and producers has changed the form of energy and power services, and demand side response, virtual power plants and distributed transactions have become more and more new choices for users. Under the new consumption of energy Internet, in addition to universal services, green power, customized services, high-quality power supply, accurate metering, and value-added services of power big data have become new needs of users.

4, infrastructure multi-network integration digital empowerment

The energy Internet being built in our country is a technological path to promote the energy revolution. At the physical level, the energy Internet needs to build a comprehensive energy network that is based on a new generation of power systems and interconnected with many fields such as natural gas, transportation, and construction.

On the production side, various types of energy need to combine their own characteristics, give play to their strengths, carry out interconnection and complement each other's advantages; On the transmission side, the smart grid interconnects with the heat pipe network, natural gas pipe network and transportation network to coordinate scheduling;

On the consumption side, electric cooling, hot gas and water are integrated energy supply. Power Internet of Things has become a key link in network security. Construction of "security chip - terminal authentication - data trust - network encryption - application key" At the information layer, the power network is gradually integrated with the modern communication network to jointly build an active global network security protection system of the information physical society, and create an open and secure iot network with holographic panoramic perception, efficient information processing, data digital security, convenient and flexible application.

At the data level, the power industry carries out digital transformation and builds a dynamic electric power digital ecology. Power big data serves social governance and economic development, enables digital grid platform, and cultivates new electric power digital industry; Connecting with the industrial Internet, serving the digital government and smart city; Docking the resources of all links of the energy value chain, giving play to the advantages of mutual benefit and symbiosis among enterprises, and building an industrial chain cooperation platform and a new energy power ecology.

In general, the core feature of the new power system in the future is that new energy plays a dominant role. At the same time, around to meet the people's yearning for a better life, the wide application of electric vehicles, clean heating, roof PV, home energy storage, smart home and electric energy replacement has made the electricity load develop in a diversified direction. In the face of major changes at both ends of the source and load, the function and form of the power grid also need to carry out profound changes. In order to promote the strategy of energy revolution, the implementation of carbon peak by 2030 and 2060 to build a "clean, low-carbon, safe and efficient" new power system. This historic task is of great significance.

Ii. Mission and Challenge

To carry the crown, must bear its weight, to hold the rose, must bear its pain. The new power system bearing the high hopes of the Party and the state is not only a historical mission, but also a major challenge. The existing power system is not a simple energy system, and the construction of a new power system that ADAPTS to the wide access of a high proportion of new energy and evolves to a higher stage in a linear development mode has a big difference between the two. To sum up the essential technology, its evolution process is three points:

(a) The evolution of technology from the existing power system to the new power system

1. From a deterministic system to a strongly uncertain system

First, the power supply side has strong uncertainty. China's power supply structure will be dominated by traditional thermal power units and gradually evolve into new energy units in the future. In the future, the installed capacity of wind power and photovoltaic power generation will show a continuous upward trend, and it is expected that the sum of the installed capacity of the two will reach about 60% in 2060, and the sum of the power generation will reach about 35%. The existing conventional thermal power, hydropower or nuclear power output shows a certain regularity and controllability; However, the output of new energy such as wind power and photovoltaic has strong uncertainty and uncontrollability in multiple time and space.