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

1. Morphological characteristics

1, a high proportion of new energy wide access

The core feature of the new power system is that new energy occupies a dominant position and becomes the main form of energy. With the proposal of China's carbon peak and carbon neutral goal, the proportion of new energy in primary energy consumption continues to increase, accelerating the replacement of fossil energy. In the future, the installed capacity of China's power supply will maintain steady and rapid growth, showing a "landscape leader, multi-source coordination" power generation will be the fastest growing power type in China, about 60% by 2060, and the sum of power generation will reach about 35%. Posture. In the total installed capacity of power supplies, the extensive access of onshore wind power and photovoltaic new energy in the future will also show a centralized and distributed trend. Large-scale scenery bases in Northwest, North and Northeast, hydropower bases in southwest, offshore wind power bases in eastern coastal areas, and distributed power sources adapted to local conditions and in considerable quantities and nearby, jointly alleviate the problem of reverse distribution of resources in China.

The extensive access of new energy in the future will also show the characteristics of intelligent flexibility, friendly grid-connection, efficient and environmental protection. Improve intelligence and flexibility through energy storage, AC/DC networking and multi-scenario integration; Through "wind, water and fire storage" multi-energy complementarity, cluster scheduling, meteorological big data power generation prediction, generalized virtual synchronization technology, improve the friendly grid-connection and active support performance; Improve efficiency and reliability through new wind energy capture and large impeller, new photovoltaic cells, digital intelligent operation and maintenance, and environmentally friendly materials; And build flexible thermal power units, natural gas and hydrogen storage peaking power station, heat storage and energy storage power station peaking power system.

2. Highly resilient power grid allocates resources flexibly and reliably

The new power system needs to solve the problems of strong uncertainty (i.e., randomness and volatility) and vulnerability under the high proportion of new energy access, and give full play to the power grid's ability of large-scale resource allocation. The future power grid will show the form of AC and DC long-distance transmission, regional grid interconnection, main network and micro-grid interaction.

Uhv AC and DC long-distance transmission has become an important means of clean energy allocation. The distributed power supply is connected in layers according to voltage level to achieve on-site consumption and balance. The rapid development of energy storage and demand side response, is expected to 2060 demand response scale is expected to reach about 360 million kilowatts, energy storage installed capacity will reach about 420 million kilowatts, the two will become the future power system important flexibility resources, to ensure the new energy consumption and system safe and stable operation. New generation scheduling system. It mainly includes:

1) From the traditional top-down scheduling mode, it has evolved into the "source network load and storage" whole-network coordinated scheduling mode;

2) From the traditional individual experience judgment to the intelligent scheduling of data-driven AI decision-making;

3) From the passive protection triggered by a single point of failure to the active defense of power iot global awareness in advance prevention;

4) Evolution to agile response (millisecond level) that combines power electronics with modern communications;

5) The core of highly resilient power grid lies in the establishment of rich scheduling and adjustment resources for new power electronic devices such as network coordination, data-driven, active defense, intelligent decision-making, composite power flow control and dynamic capacity increase.

6) From the slow response of traditional electromechanical action (second level) frequency modulation resources are insufficient to have flexible power supply, energy storage, demand-side response, and wide frequency oscillation suppression;

7) The foundation of the traditional high-elastic power grid is to build the power Internet of things with the interconnection of everything. Based on sensing devices such as Internet of Things intelligent sensing, edge computing fusion gateway, intelligent terminal and security chip, the whole process of data can be measured, collected and transmitted, and all kinds of terminals and devices can plug and play, secure access, and the Internet of everything; Fast data upload through modern communication networks such as 5G/ optical fiber/Internet of Things; Through artificial intelligence, big data and other advanced algorithms, based on the cloud platform to achieve intelligent power generation, intelligent scheduling, intelligent operation and maintenance of the whole scene and the whole chain intelligence.